Update version

Closes #1124

.docs/Docker.md

@@ -16,9 +16,9 @@ Note the `:stable` tag. DiscordChatExporter images are tagged according to the f
 
 - `stable`: Latest stable version release and maps to the latest GitHub release. This tag is updated with release of each new version. Recommended for personal use.
 - `latest`: Built from the latest commit and maps to the latest CI build on GitHub. This tag is updated with each new commit to `master` branch. Not recommended for everyday use, but you can use it if you want to try out some features that haven't been officially released yet.
-- `x.y.z` (e.g. `2.30.1`): Fixed version release and maps to the corresponding tag on GitHub. This tag is never updated once that version has been released. Recommended for use in various automation scenarios.
+- `x.y.z` (e.g. `2.30.1`): Fixed version release and maps to the corresponding tag on GitHub. This tag is never updated once that version has been released. Recommended for use in automation scenarios.
 
-You can see all available tags [here](https://hub.docker.com/r/tyrrrz/discordchatexporter/tags?page=1&ordering=name).
+You can see all available tags [here](https://hub.docker.com/r/tyrrrz/discordchatexporter/tags?ordering=name).
 
 ## Usage
 
@@ -34,7 +34,7 @@ To export a channel:
 docker run --rm -v /path/on/machine:/out tyrrrz/discordchatexporter:stable export -t TOKEN -c CHANNELID
 ```
 
-If you want colored output, real-time progress reporting, and some other stuff, pass `-it` (interactive) option:
+If you want colored output and real-time progress reporting, pass the `-it` (interactive) option:
 
 ```
 docker run --rm -it -v /path/on/machine:/out tyrrrz/discordchatexporter:stable export -t TOKEN -c CHANNELID
@@ -42,68 +42,30 @@ docker run --rm -it -v /path/on/machine:/out tyrrrz/discordchatexporter:stable e
 
 Note the `-v /path/on/machine:/out` option, which instructs Docker to bind the `/out` directory inside the container to a path on your host machine. Replace `/path/on/machine` with the directory you want the files to be saved at.
 
-**If you are running SELinux, you will need to add the `:z` option after `/out`, e.g.:**
-
-```
-docker run --rm -v /path/on/machine:/out:z tyrrrz/discordchatexporter:stable export -t TOKEN -c CHANNELID
-```
-
-For more information, refer to the [Docker docs SELinux labels for bind mounts page](https://docs.docker.com/storage/bind-mounts/#configure-the-selinux-label).
+> **Note**:
+> If you are running SELinux, you will need to add the `:z` option after `/out`, e.g.:
+>
+> ```
+> docker run --rm -v /path/on/machine:/out:z tyrrrz/discordchatexporter:stable export -t TOKEN -c CHANNELID
+> ```
+>
+> For more information, refer to the [Docker docs SELinux labels for bind mounts page](https://docs.docker.com/storage/bind-mounts/#configure-the-selinux-label).
 
 You can also use the current working directory as the output directory by specifying:
 
-- `-v $PWD:/out` in Mac/Linux
+- `-v $PWD:/out` in Bash
 - `-v $pwd.Path:/out` in PowerShell
 
-For more information, please refer to the [Dockerfile](https://github.com/Tyrrrz/DiscordChatExporter/blob/master/Dockerfile) and [Docker documentation](https://docs.docker.com/engine/reference/run/).
+For more information, please refer to the [Dockerfile](https://github.com/Tyrrrz/DiscordChatExporter/blob/master/DiscordChatExporter.Cli.dockerfile) and [Docker documentation](https://docs.docker.com/engine/reference/run).
 
 To get your Token and Channel IDs, please refer to [this page](https://github.com/Tyrrrz/DiscordChatExporter/blob/master/.docs/Token-and-IDs.md).
 
 ## Environment variables
 
-DiscordChatExpoter CLI accepts environment variables as fallbacks for the `--token` and `--bot` options.
+DiscordChatExpoter CLI accepts the `DISCORD_TOKEN` environment variable as a fallback for the `--token` option. You can set this variable either with the `--env` Docker option or with a combination of the `--env-file` Docker option and a `.env` file.
 
-- `DISCORD_TOKEN` to set the token
-- `DISCORD_TOKEN_BOT` to set whether it's a bot token (`true` or `false`)
-
-You can use these variables either with the `--env` Docker option or with a combination of the `--env-file` Docker option and a `.env` file.
-Please refer to the Docker documentation for more information:
-
-- [Docker run - Set environment variables](https://docs.docker.com/engine/reference/commandline/run/#set-environment-variables--e---env---env-file)
+Please refer to the [Docker documentation](https://docs.docker.com/engine/reference/commandline/run/#set-environment-variables--e---env---env-file) for more information.
 
 ## Permission issues with Linux hosts
 
 When bounding volumes between the container and the host, files mirrored from the Docker container will be owned by the Docker user (in most setups this is `root`). Please refer to this [issue comment](https://github.com/Tyrrrz/DiscordChatExporter/issues/800#issuecomment-1030471970) for instructions on how to override this behavior.
-
-## Build Docker images for arm on Raspberry Pi
-
-If you use the Docker image on arm (for example Raspberry Pi), you'd build the image as below.
-
-```bash
-$ git clone https://github.com/Tyrrrz/DiscordChatExporter.git
-$ cd DiscordChatExporter
-$ docker build -f DiscordChatExporter.Cli.dockerfile -t tyrrrz/discordchatexporter:latest .
-```
-
-After a while, some images are built like below.
-
-```bash
-$ docker image ls
-REPOSITORY                         TAG       IMAGE ID       CREATED              SIZE
-tyrrrz/discordchatexporter         latest    7c9ead725177   49 seconds ago       199MB
-<none>                             <none>    57f9f49d05af   About a minute ago   678MB
-mcr.microsoft.com/dotnet/sdk       5.0       72af6071941e   4 days ago           641MB
-mcr.microsoft.com/dotnet/runtime   3.1       6229bebd5a11   4 days ago           197MB
-```
-
-Among these, two images (`tyrrrz/discordchatexporter:latest` and `mcr.microsoft.com/dotnet/runtime:3.1`) are required, so you may delete the other two images.
-
-Now you can execute DiscordChatExporter:
-
-```bash
-$ docker run --rm tyrrrz/discordchatexporter:latest
-```
-
----
-
-Special thanks to [@simnalamburt](https://github.com/simnalamburt) (dockerize) and [@Nimja](https://github.com/nimja) (better instructions)

.docs/Message-filters.md

@@ -2,7 +2,7 @@
 
 You can use a special notation to filter messages that you want to have included in an export. The notation syntax is designed to mimic Discord's search query syntax, but with additional capabilities.
 
-To configure a filter, specify it in advanced export parameters when using the GUI or by passing the `--filter` option when using the CLI.
+To configure a filter, specify it in advanced export parameters when using the GUI or by passing the `--filter` option when using the CLI. For the CLI version, see also [caveats](#cli-caveats).
 
 ## Examples
 
@@ -84,10 +84,22 @@ from:Tyrrrz | from:"96-LB"
 from:96\-LB
 ```
 
-## CLI Caveat
+## CLI Caveats
 
-Negated filters (those that start with `-`) may cause parsing issues when using the CLI version of DiscordChatExporter. To avoid this, use the tilde (`~`) character instead of the dash (`-`):
+In most cases, you will need to enclose your filter in quotes (`"`) to escape characters that may have special meaning in your shell:
+
+```
+DiscordChatExporter.Cli export [...] --filter "from:Tyrrrz has:image"
+```
+
+If you need to include quotes inside the filter itself as well, use single quotes (`'`) for those instead:
+
+```
+DiscordChatExporter.Cli export [...] --filter "from:Tyrrrz 'hello world'"
+```
+
+Additionally, negated filters (those that start with `-`) may cause parsing issues even when enclosed in quotes. To avoid this, use the tilde (`~`) character instead of the dash (`-`):
 
 ```
 DiscordChatExporter.Cli export [...] --filter ~from:Tyrrrz
-```
+```

.docs/Readme.md

@@ -14,9 +14,9 @@
 - [How to get Token and Channel IDs](https://github.com/Tyrrrz/DiscordChatExporter/blob/master/.docs/Token-and-IDs.md)
 - [How to use message filters](https://github.com/Tyrrrz/DiscordChatExporter/blob/master/.docs/Message-filters.md)
 - Export scheduling with CLI:
-  - [Windows](https://github.com/Tyrrrz/DiscordChatExporter/blob/master/.docs/scheduling-windows.md)
-  - [macOS](https://github.com/Tyrrrz/DiscordChatExporter/blob/master/.docs/scheduling-MacOS.md)
-  - [Linux](https://github.com/Tyrrrz/DiscordChatExporter/blob/master/.docs/scheduling-Linux.md)
+  - [Windows](https://github.com/Tyrrrz/DiscordChatExporter/blob/master/.docs/Scheduling-Windows.md)
+  - [macOS](https://github.com/Tyrrrz/DiscordChatExporter/blob/master/.docs/Scheduling-MacOS.md)
+  - [Linux](https://github.com/Tyrrrz/DiscordChatExporter/blob/master/.docs/Scheduling-Linux.md)
 
 ## Video tutorial
 

.docs/Token-and-IDs.md

@@ -234,29 +234,9 @@ Prerequisite step: Navigate to [discord.com](https://discord.com) and login.
 
 ---
 
-## How to get a Server ID or a Server Channel ID
+## How to get a Server ID or a Channel ID
 
 1. Open Discord Settings
 2. Go to the **Advanced** section
 3. Enable **Developer Mode**
-4. Right-click on the desired server or channel and click Copy ID
-
-## How to get a Direct Message Channel ID
-
-1. Click the three dots next to any message in the channel you want to export.
-2. Paste the link into a text editor.
-3. Copy the text in the highlighted part of the link.
-
-> E.g. in https꞉//discord.com/channels/@me/**189716987098470**/0985709387059874, you should copy **189716987098470**
-
-Make sure you're not copying the user's ID.
-
-**Alternatively, you can also:**
-
-1. Open the desired direct message channel
-2. Press <kbd>Ctrl</kbd>+<kbd>Shift</kbd>+<kbd>I</kbd> (<kbd>⌥</kbd>+<kbd>⌘</kbd>+<kbd>I</kbd> on macOS) on Discord to show developer tools
-3. Navigate to the `Console` tab
-4. Type `window.location.href` and press Enter
-5. Copy the first long sequence of numbers inside the URL
-
-> E.g. in https꞉//discord.com/channels/@me/**84289740160**, you should copy **84289740160**
+4. Right-click on the desired server or channel and click Copy Server ID or Copy Channel ID

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -1,4 +1,4 @@
-name: 🐞 Bug report
+name: 🐛 Bug report
 description: Report broken functionality.
 labels: [bug]
 
@@ -6,26 +6,25 @@ body:
   - type: markdown
     attributes:
       value: |
-        🧐 **Guidelines:**
+        - Avoid generic or vague titles such as "Something's not working" or "A couple of problems" — be as descriptive as possible.
+        - Keep your issue focused on one single problem. If you have multiple bug reports, please create a separate issue for each of them.
+        - Issues should represent **complete and actionable** work items. If you are unsure about something or have a question, please start a [discussion](https://github.com/Tyrrrz/DiscordChatExporter/discussions/new) instead.
+        - Remember that **DiscordChatExporter** is an open-source project funded by the community. If you find it useful, **please consider [donating](https://tyrrrz.me/donate) to support its development**.
 
-        - Search through [existing issues](https://github.com/Tyrrrz/DiscordChatExporter/issues?q=is%3Aissue) first to ensure that this bug has not been reported before.
-        - Write a descriptive title for your issue. Avoid generic or vague titles such as "Something's not working" or "A couple of problems".
-        - Keep your issue focused on one single problem. If you have multiple bug reports, please create separate issues for each of them.
-        - Provide as much context as possible in the details section. Include screenshots, screen recordings, links, references, or anything else you may consider relevant.
-        - If you want to ask a question instead of reporting a bug, please use [discussions](https://github.com/Tyrrrz/DiscordChatExporter/discussions/new) instead.
+        ___
 
   - type: input
     attributes:
       label: Version
-      description: Which version of DiscordChatExporter does this bug affect?
-      placeholder: ver X.Y.Z
+      description: Which version of the application does this bug affect? Make sure you're not using an outdated version.
+      placeholder: v1.0.0
     validations:
       required: true
 
   - type: dropdown
     attributes:
       label: Flavor
-      description: Does this bug affect the GUI version, the CLI version, or both?
+      description: Which flavor(s) of the application does this bug affect?
       multiple: true
       options:
         - GUI (Graphical User Interface)
@@ -33,10 +32,18 @@ body:
     validations:
       required: true
 
+  - type: input
+    attributes:
+      label: Platform
+      description: Which platform do you experience this bug on?
+      placeholder: Docker / Windows 11
+    validations:
+      required: true
+
   - type: dropdown
     attributes:
       label: Export format
-      description: Does this bug affect specific export format(s)? If not applicable, leave this field blank.
+      description: Which export format(s) do you experience this bug with, if applicable?
       multiple: true
       options:
         - HTML
@@ -44,21 +51,57 @@ body:
         - JSON
         - CSV
 
-  - type: textarea
-    attributes:
-      label: Details
-      description: Clear and thorough explanation of the bug.
-      placeholder: I was doing X expecting Y to happen, but Z happened instead.
-    validations:
-      required: true
-
   - type: textarea
     attributes:
       label: Steps to reproduce
-      description: Minimum steps required to reproduce the bug.
+      description: >
+        Minimum steps required to reproduce the bug, including prerequisites, export settings, or other relevant items.
+        The information provided in this field must be readily actionable, meaning that anyone should be able to reproduce the bug by following these steps.
+        If the bug depends on external factors (such as a specific server, channel, or message), then this field must include the server invite and the corresponding link.
       placeholder: |
+        Server invite: https://discord.gg/...
+        Channel or message link: https://discord.com/channels/.../...
+
+        Export settings:
+        - ...
+
+        Application settings:
+        - ...
+
+        Steps:
         - Step 1
         - Step 2
         - Step 3
     validations:
       required: true
+
+  - type: textarea
+    attributes:
+      label: Details
+      description: Clear and thorough explanation of the bug, including any additional information you may find relevant.
+      placeholder: |
+        - Expected behavior: ...
+        - Actual behavior: ...
+    validations:
+      required: true
+
+  - type: checkboxes
+    attributes:
+      label: Checklist
+      description: Quick list of checks to ensure that everything is in order.
+      options:
+        - label: I have looked through existing issues to make sure that this bug has not been reported before
+          required: true
+        - label: I have provided a descriptive title for this issue
+          required: true
+        - label: I have made sure that that this bug is reproducible on the latest version of the application
+          required: true
+        - label: I have provided all the information needed to reproduce this bug as efficiently as possible
+          required: true
+        - label: I have sponsored this project
+          required: false
+
+  - type: markdown
+    attributes:
+      value: |
+        If you are struggling to provide actionable reproduction steps, or if something else is preventing you from creating a complete bug report, please start a [discussion](https://github.com/Tyrrrz/DiscordChatExporter/discussions/new) instead.

.github/ISSUE_TEMPLATE/config.yml

@@ -3,12 +3,12 @@ contact_links:
   - name: ⚠ Feature request
     url: https://github.com/Tyrrrz/.github/blob/master/docs/project-status.md
     about: Sorry, but this project is in maintenance mode and no longer accepts new feature requests.
-  - name: 💬 Discord server
-    url: https://discord.gg/2SUWKFnHSm
-    about: Chat with the project community.
   - name: 📖 Documentation
     url: https://github.com/Tyrrrz/DiscordChatExporter/blob/master/.docs
     about: Find usage guides and frequently asked questions.
   - name: 🗨 Discussions
     url: https://github.com/Tyrrrz/DiscordChatExporter/discussions/new
-    about: Ask and answer questions.
+    about: Ask and answer questions.
+  - name: 💬 Discord server
+    url: https://discord.gg/2SUWKFnHSm
+    about: Chat with the project community.

.github/workflows/docker.yml

@@ -5,51 +5,82 @@ on: [push, pull_request]
 jobs:
   build:
     runs-on: ubuntu-latest
+    permissions:
+      actions: write
+      contents: read
 
     steps:
       - name: Checkout
         uses: actions/checkout@v3
 
-      - name: Build container
-        run: docker build -f DiscordChatExporter.Cli.dockerfile .
+      - name: Install Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Build image
+        run: >
+          docker buildx build
+          --file DiscordChatExporter.Cli.dockerfile
+          --platform linux/amd64,linux/arm64
+          --output type=tar,dest=DiscordChatExporter.Cli.Docker.tar
+          .
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: DiscordChatExporter.Cli.Docker
+          path: DiscordChatExporter.Cli.Docker.tar
 
   deploy-latest:
     if: ${{ github.event_name == 'push' && github.ref_type == 'branch' && github.ref_name == 'master' }}
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
 
     steps:
       - name: Checkout
         uses: actions/checkout@v3
 
+      - name: Install Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
       - name: Login to DockerHub
-        run: docker login -u tyrrrz -p ${{ secrets.DOCKER_TOKEN }}
+        run: >
+          echo ${{ secrets.DOCKER_TOKEN }} |
+          docker login --username tyrrrz --password-stdin
 
-      - name: Build container
-        run: docker build -f DiscordChatExporter.Cli.dockerfile -t tyrrrz/discordchatexporter:latest .
-
-      - name: Push container
-        run: docker push tyrrrz/discordchatexporter:latest
+      - name: Build & push image
+        run: >
+          docker buildx build
+          --file DiscordChatExporter.Cli.dockerfile
+          --platform linux/amd64,linux/arm64
+          --push
+          --tag tyrrrz/discordchatexporter:latest
+          .
 
   deploy-stable:
     if: ${{ github.event_name == 'push' && github.ref_type == 'tag' }}
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
 
     steps:
       - name: Checkout
         uses: actions/checkout@v3
 
-      - name: Get release version
-        id: get_version
-        uses: dawidd6/action-get-tag@v1
+      - name: Install Docker Buildx
+        uses: docker/setup-buildx-action@v2
 
       - name: Login to DockerHub
-        run: docker login -u tyrrrz -p ${{ secrets.DOCKER_TOKEN }}
+        run: >
+          echo ${{ secrets.DOCKER_TOKEN }} |
+          docker login --username tyrrrz --password-stdin
 
-      - name: Build container
-        run: docker build -f DiscordChatExporter.Cli.dockerfile -t tyrrrz/discordchatexporter:stable -t tyrrrz/discordchatexporter:${{ steps.get_version.outputs.tag }} .
-
-      - name: Push container (stable)
-        run: docker push tyrrrz/discordchatexporter:stable
-
-      - name: Push container (${{ steps.get_version.outputs.tag }})
-        run: docker push tyrrrz/discordchatexporter:${{ steps.get_version.outputs.tag }}
+      - name: Build & push image
+        run: >
+          docker buildx build
+          --file DiscordChatExporter.Cli.dockerfile
+          --platform linux/amd64,linux/arm64
+          --push
+          --tag tyrrrz/discordchatexporter:stable
+          --tag tyrrrz/discordchatexporter:${{ github.ref_name }}
+          .

.github/workflows/main.yml

@@ -5,6 +5,8 @@ on: [push, pull_request]
 jobs:
   test:
     runs-on: windows-latest
+    permissions:
+      contents: read
 
     env:
       DOTNET_SKIP_FIRST_TIME_EXPERIENCE: true
@@ -23,7 +25,14 @@ jobs:
       - name: Run tests
         # Tests need access to secrets, so we can't run them against PRs because of limited trust
         if: ${{ github.event_name != 'pull_request' }}
-        run: dotnet test --configuration Release --logger GitHubActions --collect:"XPlat Code Coverage" -- DataCollectionRunSettings.DataCollectors.DataCollector.Configuration.Format=opencover
+        run: >
+          dotnet test
+          --configuration Release
+          --logger "GitHubActions;summary.includePassedTests=true;summary.includeSkippedTests=true"
+          --collect:"XPlat Code Coverage"
+          --
+          RunConfiguration.CollectSourceInformation=true
+          DataCollectionRunSettings.DataCollectors.DataCollector.Configuration.Format=opencover
         env:
           DISCORD_TOKEN: ${{ secrets.DISCORD_TOKEN }}
 
@@ -32,9 +41,12 @@ jobs:
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
 
-  package:
+  pack:
     needs: test
     runs-on: windows-latest
+    permissions:
+      actions: write
+      contents: read
 
     env:
       DOTNET_SKIP_FIRST_TIME_EXPERIENCE: true
@@ -51,27 +63,36 @@ jobs:
           dotnet-version: 7.0.x
 
       - name: Publish (CLI)
-        run: dotnet publish DiscordChatExporter.Cli/ -o DiscordChatExporter.Cli/bin/Publish/ --configuration Release
+        run: >
+          dotnet publish DiscordChatExporter.Cli
+          --output DiscordChatExporter.Cli/publish/
+          --configuration Release
 
       - name: Publish (GUI)
-        run: dotnet publish DiscordChatExporter.Gui/ -o DiscordChatExporter.Gui/bin/Publish/ --configuration Release
+        run: >
+          dotnet publish DiscordChatExporter.Gui
+          --output DiscordChatExporter.Gui/publish/
+          --configuration Release
 
       - name: Upload artifacts (CLI)
         uses: actions/upload-artifact@v3
         with:
           name: DiscordChatExporter.Cli
-          path: DiscordChatExporter.Cli/bin/Publish/
+          path: DiscordChatExporter.Cli/publish/
 
       - name: Upload artifacts (GUI)
         uses: actions/upload-artifact@v3
         with:
           name: DiscordChatExporter
-          path: DiscordChatExporter.Gui/bin/Publish/
+          path: DiscordChatExporter.Gui/publish/
 
   deploy:
     if: ${{ github.event_name == 'push' && github.ref_type == 'tag' }}
-    needs: package
+    needs: pack
     runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: write
 
     steps:
       - name: Download artifacts (CLI)
@@ -87,43 +108,49 @@ jobs:
           path: DiscordChatExporter.Gui
 
       - name: Create package (CLI)
-        run: Compress-Archive -Path DiscordChatExporter.Cli/* -DestinationPath DiscordChatExporter.Cli.zip -Force
         shell: pwsh
+        run: >
+          Compress-Archive
+          -Path DiscordChatExporter.Cli/*
+          -DestinationPath DiscordChatExporter.Cli.zip
+          -Force
 
       - name: Create package (GUI)
-        run: Compress-Archive -Path DiscordChatExporter.Gui/* -DestinationPath DiscordChatExporter.zip -Force
         shell: pwsh
+        run: >
+          Compress-Archive
+          -Path DiscordChatExporter.Gui/*
+          -DestinationPath DiscordChatExporter.zip
+          -Force
 
       - name: Create release
-        uses: softprops/action-gh-release@v1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          files: |
-            DiscordChatExporter.Cli.zip
-            DiscordChatExporter.zip
-          body: |
-            [Changelog](https://github.com/Tyrrrz/DiscordChatExporter/blob/master/Changelog.md)
+        run: >
+          gh release create "${{ github.ref_name }}"
+          "DiscordChatExporter.Cli.zip"
+          "DiscordChatExporter.zip"
+          --repo "${{ github.event.repository.full_name }}"
+          --title "${{ github.ref_name }}"
+          --notes "[Changelog](${{ github.event.repository.html_url }}/blob/${{ github.ref_name }}/Changelog.md)"
+          --verify-tag
 
   notify:
     needs: deploy
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
 
     steps:
-      - name: Get release version
-        id: get_version
-        uses: dawidd6/action-get-tag@v1
-
       - name: Notify Discord
-        uses: satak/webrequest-action@v1.2.4
+        uses: tyrrrz/action-http-request@v1
         with:
           url: ${{ secrets.DISCORD_WEBHOOK }}
           method: POST
           headers: |
+            Content-Type: application/json; charset=UTF-8
+          body: |
             {
-              "ContentType": "application/json; charset=UTF-8"
-            }
-          payload: |
-            {
-              "content": "**DiscordChatExporter** new version released!\nVersion: `${{ steps.get_version.outputs.tag }}`\nChangelog: <https://github.com/Tyrrrz/DiscordChatExporter/blob/${{ steps.get_version.outputs.tag }}/Changelog.md>"
+              "avatar_url": "https://raw.githubusercontent.com/${{ github.event.repository.full_name }}/${{ github.ref_name }}/favicon.png",
+              "content": "**${{ github.event.repository.name }}** new version released!\nVersion: `${{ github.ref_name }}`\nChangelog: <${{ github.event.repository.html_url }}/blob/${{ github.ref_name }}/Changelog.md>"
             }

Changelog.md

@@ -1,8 +1,74 @@
 # Changelog
 
+## v2.41 (15-Sep-2023)
+
+- General changes:
+  - Replaced the "date format" option with a "locale" option. Now, you can choose one of the locales supported by the Discord app, and DiscordChatExporter will infer all the required date, time, and number formats automatically. In GUI, the locale can be selected from the settings window. In CLI, the locale can be specified using the `--locale` option (e.g. `--locale "en-US"`). By default, the current system locale is used.
+  - Optimized the algorithm for fetching threads to improve performance. (Thanks [@slatinsky](https://github.com/slatinsky))
+- GUI changes:
+  - Improved the initial load time after submitting the token. Now, only the guilds are loaded initially, and the channels are loaded on-demand when the user selects a guild. This should significantly improve performance for accounts with many guilds.
+  - Added an option to include threads in the channel list, which is configurable in settings. When enabled, threads will appear at the bottom of the list, grouped by the parent channel. Note that pulling threads (especially archived threads) can be a very time-consuming process, depending on the guild size. By default, threads are not included.
+- CLI changes:
+  - Added a warning when using the `--bot` option, informing that it's obsolete and shouldn't be used.
+  - Changed the `--include-threads` option on the `channels` command from a switch (boolean) option, to an enum (choice) option. It now has possible values of `none`, `active`, or `all`, indicating which threads should be included. To include both active and archived threads, use `--include-threads all`. For backwards compatibility, the `--include-threads` option can still be used as a switch, in which case it will be treated as `--include-threads active`. Note that pulling threads (especially archived threads) can be a very time-consuming process, depending on the guild size.
+  - Added the `--include-threads` option to the `exportguild` and `exportall` commands. Using this option, you can specify whether to include threads (and which type) in the export. By default, threads are not included.
+  - Added the `--include-vc` option to the `channels` command. Using this option, you can specify whether to include voice-channel-accompanying text channels in the output. By default, these channels are included.
+  - Changed the progress reporting behavior of export commands such that tasks are now hidden on completion if parallelization is enabled (i.e. `--parallel` is set to `2` or higher). This should help improve visual clarity when exporting many channels in parallel.
+
+## v2.40.4 (11-Aug-2023)
+
+- HTML changes:
+  - Fixed an issue where the "call lasted for X minutes" system message was unnecessarily too precise. Now, it's rounded to the nearest minute.
+  - Fixed an issue where multi-line quote blocks with empty lines in the middle were rendered as separate blocks.
+- JSON changes:
+  - Added the `users` field to the reaction object, containing an array with limited information about the users that reacted with that particular emoji. (Thanks [@slatinsky](https://github.com/slatinsky))
+
+## v2.40.3 (29-Jul-2023)
+
+- GUI changes:
+  - Fixed an issue where guild categories were rendered with blank names.
+
+## v2.40.2 (27-Jul-2023)
+
+- General changes:
+  - Improved error reporting on unexpected HTTP errors.
+- CLI changes:
+  - Fixed an issue which caused a crash when trying to export a private (but accessible) channel inside a private (but not accessible) category.
+
+## v2.40.1 (21-Jul-2023)
+
+- General changes:
+  - Fixed an issue where the fallback avatar (i.e. the avatar used for when the user doesn't have a custom one set) was not resolved properly for users that don't have a discriminator.
+- CLI changes:
+  - Added the `--include-vc` option to the `exportall` and `exportguild` commands, which instructs whether to include voice-channel-accompanying text channels in the export. By default, this is set to `true` to match the previous behavior. To disable the option, use `--include-vc false`.
+- GUI changes:
+  - Replaced the blur effect applied to the token text box with a password mask.
+- JSON format changes:
+  - Added the `exportedAt` field to the export metadata, which contains the timestamp corresponding to when the export was created. (Thanks [@slatinsky](https://github.com/slatinsky))
+  - Added the `roles` field to the object describing a user. This field contains an array of objects that describe the roles assigned to the user. (Thanks [@slatinsky](https://github.com/slatinsky))
+
+## v2.40 (08-Jun-2023)
+
+- General changes:
+  - Added support for users that don't have discriminators.
+  - Added a precondition check that verifies whether the requested channel contains any messages for the specified period, before starting the export process. This check works by comparing the export bounds against the ID of the last message in the channel, which is provided by the Discord API as part of the channel metadata. When exporting many channels in batches (e.g. using the `exportall` command), this check may eliminate a significant number of unnecessary API calls and speed up the export process.
+- CLI changes:
+  - Extended the `channels` command with the `--include-threads` option. When this option is provided, the command will include channel threads in the output. (Thanks [@WAUthethird](https://github.com/WAUthethird))
+  - Simplified the information in the `guide` command related to the extraction of DM channel IDs. Discord now provides a native way of copying IDs of DM channels, so the previous devtools-based workaround is no longer necessary.
+- GUI changes:
+  - Added a blur effect to the token text box, which activates when the control loses focus. This is done to reduce the risk of accidentally exposing the token when taking screenshots.
+- HTML format changes:
+  - Added support for the header markdown syntax.
+  - Added support for the list markdown syntax.
+
+## v2.39.1 (10-Mar-2023)
+
+- Fixed an issue where messages containing mentions of users that left the server (but haven't deleted their account) were incorrectly rendered as `@Unknown`.
+- Fixed an issue where messages containing video links were not rendered correctly in the HTML export. Now, they are rendered using a video player and the referenced assets are pulled if the "download assets" option is enabled.
+
 ## v2.39 (25-Feb-2023)
 
-- Added an option to specify the directory path for downloaded assets. This can be used, in combination with the "reuse assets" option, to have a shared asset directory for multiple exports. In GUI, this option can be found in the advanced setion of the export dialog. In CLI, it's available as `--media-dir <path>`. (Thanks [@96-LB](https://github.com/96-LB))
+- Added an option to specify the directory path for downloaded assets. This can be used, in combination with the "reuse assets" option, to have a shared asset directory for multiple exports. In GUI, this option can be found in the advanced section of the export dialog. In CLI, it's available as `--media-dir <path>`. (Thanks [@96-LB](https://github.com/96-LB))
 - Added support for server-level user avatars. If a user has a custom avatar set on the server, it will be rendered instead of their main avatar.
 - CLI changes:
   - Extended the `exportall` command with the `--data-package` option. You can use this option to provide the path to your personal data package (`package.zip` file), requested from Discord. When provided, the command will pull channels listed in the package instead of using the Discord API to query them. This can be particularly useful if you want to export DM channels that have been closed, as the personal data package should still contain their IDs.
@@ -21,7 +87,7 @@
   - Updated the usage guide with additional steps required to retrieve the user token.
   - Fixed an issue where certain user mentions were incorrectly rendered as `@Unknown`.
   - Fixed an issue where some embed images were rendered using their actual URLs instead of Discord proxy URLs.
-- GUI changes: 
+- GUI changes:
   - Added a text box for specifying the output path when exporting channels. It can be used to set an output path that uses template tokens, which previously required hacky workarounds. This text box can be left empty, in which case clicking on the "Export" button will open the file or folder picker dialog, matching the previous behavior.
   - Added a notification when the application is updated to a new version, containing the changelog link.
   - Moved the "reuse assets" option from the settings dialog to the export dialog.
@@ -29,7 +95,7 @@
   - Minor cosmetic improvements.
 - CLI changes:
   - Changed the behavior of the `export` command when providing IDs of category channels. Now, instead of displaying an error, the command will export all channels contained within the corresponding categories.
-- HTML format changes: 
+- HTML format changes:
   - Added proper support for more system notification messages.
   - Added support for rendering server invites. Now, if the message contains an invite link, the export will show the server icon and include additional information, such as the name of the server and the target channel.
   - Changed the preamble part of the export to show the channel icon when available, instead of the default Discord logo. This is only available for group DM channels. (Thanks [@CanePlayz](https://github.com/CanePlayz))
@@ -524,4 +590,4 @@ Please note that CSV export is most likely not going to receive future updates a
 - Added support for user and role mentions.
 - Added support for channel mentions.
 - Fixed text in pre blocks not being wrapped correctly.
-- Added workaround for non-default message types.
+- Added workaround for non-default message types.

Directory.Build.props

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>net7.0</TargetFramework>
-    <Version>2.39</Version>
+    <Version>2.41</Version>
     <Company>Tyrrrz</Company>
     <Copyright>Copyright (c) Oleksii Holub</Copyright>
     <LangVersion>preview</LangVersion>

DiscordChatExporter.Cli.Tests/DiscordChatExporter.Cli.Tests.csproj

@@ -8,22 +8,22 @@
 
   <ItemGroup>
     <Content Include="xunit.runner.json" CopyToOutputDirectory="PreserveNewest" />
-    <None Include="*.secret" CopyToOutputDirectory="PreserveNewest" />
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="AngleSharp" Version="1.0.1" />
-    <PackageReference Include="FluentAssertions" Version="6.10.0" />
-    <PackageReference Include="GitHubActionsTestLogger" Version="2.0.1" PrivateAssets="all" />
+    <PackageReference Include="AngleSharp" Version="1.0.4" />
+    <PackageReference Include="CSharpier.MsBuild" Version="0.25.0" PrivateAssets="all" />
+    <PackageReference Include="FluentAssertions" Version="6.11.0" />
+    <PackageReference Include="GitHubActionsTestLogger" Version="2.3.2" PrivateAssets="all" />
     <PackageReference Include="JsonExtensions" Version="1.2.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration" Version="7.0.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="7.0.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration.UserSecrets" Version="7.0.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.5.0" />
-    <PackageReference Include="ReflectionMagic" Version="4.1.0" />
-    <PackageReference Include="xunit" Version="2.4.2" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5" PrivateAssets="all" />
-    <PackageReference Include="coverlet.collector" Version="3.2.0" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.0" />
+    <PackageReference Include="ReflectionMagic" Version="5.0.0" />
+    <PackageReference Include="xunit" Version="2.5.0" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.0" PrivateAssets="all" />
+    <PackageReference Include="coverlet.collector" Version="6.0.0" PrivateAssets="all" />
   </ItemGroup>
 
   <ItemGroup>

DiscordChatExporter.Cli.Tests/Infra/ChannelIds.cs

@@ -23,4 +23,4 @@ public static class ChannelIds
     public static Snowflake SelfContainedTestCases { get; } = Snowflake.Parse("887441432678379560");
 
     public static Snowflake StickerTestCases { get; } = Snowflake.Parse("939668868253769729");
-}
+}

DiscordChatExporter.Cli.Tests/Infra/ExportWrapper.cs

@@ -19,14 +19,16 @@ namespace DiscordChatExporter.Cli.Tests.Infra;
 
 public static class ExportWrapper
 {
-    private static readonly AsyncKeyedLocker<string> Locker = new(o =>
-    {
-        o.PoolSize = 20;
-        o.PoolInitialFill = 1;
-    });
+    private static readonly AsyncKeyedLocker<string> Locker =
+        new(o =>
+        {
+            o.PoolSize = 20;
+            o.PoolInitialFill = 1;
+        });
 
     private static readonly string DirPath = Path.Combine(
-        Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location) ?? Directory.GetCurrentDirectory(),
+        Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location)
+            ?? Directory.GetCurrentDirectory(),
         "ExportCache"
     );
 
@@ -36,9 +38,7 @@ public static class ExportWrapper
         {
             Directory.Delete(DirPath, true);
         }
-        catch (DirectoryNotFoundException)
-        {
-        }
+        catch (DirectoryNotFoundException) { }
 
         Directory.CreateDirectory(DirPath);
     }
@@ -48,32 +48,31 @@ public static class ExportWrapper
         var fileName = channelId.ToString() + '.' + format.GetFileExtension();
         var filePath = Path.Combine(DirPath, fileName);
 
-        // Lock separately for each channel and format
-        using (await Locker.LockAsync(filePath))
-        {
-            // Perform export only if it hasn't been done before
-            if (!File.Exists(filePath))
-            {
-                await new ExportChannelsCommand
-                {
-                    Token = Secrets.DiscordToken,
-                    ChannelIds = new[] { channelId },
-                    ExportFormat = format,
-                    OutputPath = filePath
-                }.ExecuteAsync(new FakeConsole());
-            }
+        using var _ = await Locker.LockAsync(filePath);
+        using var console = new FakeConsole();
 
-            return await File.ReadAllTextAsync(filePath);
+        // Perform the export only if it hasn't been done before
+        if (!File.Exists(filePath))
+        {
+            await new ExportChannelsCommand
+            {
+                Token = Secrets.DiscordToken,
+                ChannelIds = new[] { channelId },
+                ExportFormat = format,
+                OutputPath = filePath,
+                Locale = "en-US",
+                IsUtcNormalizationEnabled = true
+            }.ExecuteAsync(console);
         }
+
+        return await File.ReadAllTextAsync(filePath);
     }
 
-    public static async ValueTask<IHtmlDocument> ExportAsHtmlAsync(Snowflake channelId) => Html.Parse(
-        await ExportAsync(channelId, ExportFormat.HtmlDark)
-    );
+    public static async ValueTask<IHtmlDocument> ExportAsHtmlAsync(Snowflake channelId) =>
+        Html.Parse(await ExportAsync(channelId, ExportFormat.HtmlDark));
 
-    public static async ValueTask<JsonElement> ExportAsJsonAsync(Snowflake channelId) => Json.Parse(
-        await ExportAsync(channelId, ExportFormat.Json)
-    );
+    public static async ValueTask<JsonElement> ExportAsJsonAsync(Snowflake channelId) =>
+        Json.Parse(await ExportAsync(channelId, ExportFormat.Json));
 
     public static async ValueTask<string> ExportAsPlainTextAsync(Snowflake channelId) =>
         await ExportAsync(channelId, ExportFormat.PlainText);
@@ -81,27 +80,27 @@ public static class ExportWrapper
     public static async ValueTask<string> ExportAsCsvAsync(Snowflake channelId) =>
         await ExportAsync(channelId, ExportFormat.Csv);
 
-    public static async ValueTask<IReadOnlyList<IElement>> GetMessagesAsHtmlAsync(Snowflake channelId) =>
-        (await ExportAsHtmlAsync(channelId))
-        .QuerySelectorAll("[data-message-id]")
-        .ToArray();
+    public static async ValueTask<IReadOnlyList<IElement>> GetMessagesAsHtmlAsync(
+        Snowflake channelId
+    ) => (await ExportAsHtmlAsync(channelId)).QuerySelectorAll("[data-message-id]").ToArray();
 
-    public static async ValueTask<IReadOnlyList<JsonElement>> GetMessagesAsJsonAsync(Snowflake channelId) =>
-        (await ExportAsJsonAsync(channelId))
-        .GetProperty("messages")
-        .EnumerateArray()
-        .ToArray();
+    public static async ValueTask<IReadOnlyList<JsonElement>> GetMessagesAsJsonAsync(
+        Snowflake channelId
+    ) => (await ExportAsJsonAsync(channelId)).GetProperty("messages").EnumerateArray().ToArray();
 
-    public static async ValueTask<IElement> GetMessageAsHtmlAsync(Snowflake channelId, Snowflake messageId)
+    public static async ValueTask<IElement> GetMessageAsHtmlAsync(
+        Snowflake channelId,
+        Snowflake messageId
+    )
     {
-        var message = (await GetMessagesAsHtmlAsync(channelId))
-            .SingleOrDefault(e =>
+        var message = (await GetMessagesAsHtmlAsync(channelId)).SingleOrDefault(
+            e =>
                 string.Equals(
                     e.GetAttribute("data-message-id"),
                     messageId.ToString(),
                     StringComparison.OrdinalIgnoreCase
                 )
-            );
+        );
 
         if (message is null)
         {
@@ -113,16 +112,19 @@ public static class ExportWrapper
         return message;
     }
 
-    public static async ValueTask<JsonElement> GetMessageAsJsonAsync(Snowflake channelId, Snowflake messageId)
+    public static async ValueTask<JsonElement> GetMessageAsJsonAsync(
+        Snowflake channelId,
+        Snowflake messageId
+    )
     {
-        var message = (await GetMessagesAsJsonAsync(channelId))
-            .SingleOrDefault(j =>
+        var message = (await GetMessagesAsJsonAsync(channelId)).SingleOrDefault(
+            j =>
                 string.Equals(
                     j.GetProperty("id").GetString(),
                     messageId.ToString(),
                     StringComparison.OrdinalIgnoreCase
                 )
-            );
+        );
 
         if (message.ValueKind == JsonValueKind.Undefined)
         {
@@ -133,4 +135,4 @@ public static class ExportWrapper
 
         return message;
     }
-}
+}

DiscordChatExporter.Cli.Tests/Infra/Secrets.cs

@@ -12,6 +12,6 @@ internal static class Secrets
         .Build();
 
     public static string DiscordToken =>
-        Configuration["DISCORD_TOKEN"] ??
-        throw new InvalidOperationException("Discord token not provided for tests.");
-}
+        Configuration["DISCORD_TOKEN"]
+        ?? throw new InvalidOperationException("Discord token not provided for tests.");
+}

DiscordChatExporter.Cli.Tests/Specs/CsvContentSpecs.cs

@@ -8,22 +8,24 @@ namespace DiscordChatExporter.Cli.Tests.Specs;
 public class CsvContentSpecs
 {
     [Fact]
-    public async Task Messages_are_exported_correctly()
+    public async Task I_can_export_a_channel_in_the_CSV_format()
     {
         // Act
         var document = await ExportWrapper.ExportAsCsvAsync(ChannelIds.DateRangeTestCases);
 
         // Assert
-        document.Should().ContainAll(
-            "Tyrrrz#5447",
-            "Hello world",
-            "Goodbye world",
-            "Foo bar",
-            "Hurdle Durdle",
-            "One",
-            "Two",
-            "Three",
-            "Yeet"
-        );
+        document
+            .Should()
+            .ContainAll(
+                "tyrrrz",
+                "Hello world",
+                "Goodbye world",
+                "Foo bar",
+                "Hurdle Durdle",
+                "One",
+                "Two",
+                "Three",
+                "Yeet"
+            );
     }
-}
+}

DiscordChatExporter.Cli.Tests/Specs/DateRangeSpecs.cs

@@ -17,7 +17,7 @@ namespace DiscordChatExporter.Cli.Tests.Specs;
 public class DateRangeSpecs
 {
     [Fact]
-    public async Task Messages_filtered_after_specific_date_only_include_messages_sent_after_that_date()
+    public async Task I_can_filter_the_export_to_only_include_messages_sent_after_the_specified_date()
     {
         // Arrange
         var after = new DateTimeOffset(2021, 07, 24, 0, 0, 0, TimeSpan.Zero);
@@ -34,8 +34,7 @@ public class DateRangeSpecs
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
-        var timestamps = Json
-            .Parse(await File.ReadAllTextAsync(file.Path))
+        var timestamps = Json.Parse(await File.ReadAllTextAsync(file.Path))
             .GetProperty("messages")
             .EnumerateArray()
             .Select(j => j.GetProperty("timestamp").GetDateTimeOffset())
@@ -43,25 +42,32 @@ public class DateRangeSpecs
 
         timestamps.All(t => t > after).Should().BeTrue();
 
-        timestamps.Should().BeEquivalentTo(new[]
-        {
-            new DateTimeOffset(2021, 07, 24, 13, 49, 13, TimeSpan.Zero),
-            new DateTimeOffset(2021, 07, 24, 14, 52, 38, TimeSpan.Zero),
-            new DateTimeOffset(2021, 07, 24, 14, 52, 39, TimeSpan.Zero),
-            new DateTimeOffset(2021, 07, 24, 14, 52, 40, TimeSpan.Zero),
-            new DateTimeOffset(2021, 09, 08, 14, 26, 35, TimeSpan.Zero)
-        }, o =>
-        {
-            return o
-                .Using<DateTimeOffset>(ctx =>
-                    ctx.Subject.Should().BeCloseTo(ctx.Expectation, TimeSpan.FromSeconds(1))
-                )
-                .WhenTypeIs<DateTimeOffset>();
-        });
+        timestamps
+            .Should()
+            .BeEquivalentTo(
+                new[]
+                {
+                    new DateTimeOffset(2021, 07, 24, 13, 49, 13, TimeSpan.Zero),
+                    new DateTimeOffset(2021, 07, 24, 14, 52, 38, TimeSpan.Zero),
+                    new DateTimeOffset(2021, 07, 24, 14, 52, 39, TimeSpan.Zero),
+                    new DateTimeOffset(2021, 07, 24, 14, 52, 40, TimeSpan.Zero),
+                    new DateTimeOffset(2021, 09, 08, 14, 26, 35, TimeSpan.Zero)
+                },
+                o =>
+                {
+                    return o.Using<DateTimeOffset>(
+                            ctx =>
+                                ctx.Subject
+                                    .Should()
+                                    .BeCloseTo(ctx.Expectation, TimeSpan.FromSeconds(1))
+                        )
+                        .WhenTypeIs<DateTimeOffset>();
+                }
+            );
     }
 
     [Fact]
-    public async Task Messages_filtered_before_specific_date_only_include_messages_sent_before_that_date()
+    public async Task I_can_filter_the_export_to_only_include_messages_sent_before_the_specified_date()
     {
         // Arrange
         var before = new DateTimeOffset(2021, 07, 24, 0, 0, 0, TimeSpan.Zero);
@@ -78,8 +84,7 @@ public class DateRangeSpecs
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
-        var timestamps = Json
-            .Parse(await File.ReadAllTextAsync(file.Path))
+        var timestamps = Json.Parse(await File.ReadAllTextAsync(file.Path))
             .GetProperty("messages")
             .EnumerateArray()
             .Select(j => j.GetProperty("timestamp").GetDateTimeOffset())
@@ -87,23 +92,30 @@ public class DateRangeSpecs
 
         timestamps.All(t => t < before).Should().BeTrue();
 
-        timestamps.Should().BeEquivalentTo(new[]
-        {
-            new DateTimeOffset(2021, 07, 19, 13, 34, 18, TimeSpan.Zero),
-            new DateTimeOffset(2021, 07, 19, 15, 58, 48, TimeSpan.Zero),
-            new DateTimeOffset(2021, 07, 19, 17, 23, 58, TimeSpan.Zero)
-        }, o =>
-        {
-            return o
-                .Using<DateTimeOffset>(ctx =>
-                    ctx.Subject.Should().BeCloseTo(ctx.Expectation, TimeSpan.FromSeconds(1))
-                )
-                .WhenTypeIs<DateTimeOffset>();
-        });
+        timestamps
+            .Should()
+            .BeEquivalentTo(
+                new[]
+                {
+                    new DateTimeOffset(2021, 07, 19, 13, 34, 18, TimeSpan.Zero),
+                    new DateTimeOffset(2021, 07, 19, 15, 58, 48, TimeSpan.Zero),
+                    new DateTimeOffset(2021, 07, 19, 17, 23, 58, TimeSpan.Zero)
+                },
+                o =>
+                {
+                    return o.Using<DateTimeOffset>(
+                            ctx =>
+                                ctx.Subject
+                                    .Should()
+                                    .BeCloseTo(ctx.Expectation, TimeSpan.FromSeconds(1))
+                        )
+                        .WhenTypeIs<DateTimeOffset>();
+                }
+            );
     }
 
     [Fact]
-    public async Task Messages_filtered_between_specific_dates_only_include_messages_sent_between_those_dates()
+    public async Task I_can_filter_the_export_to_only_include_messages_sent_between_the_specified_dates()
     {
         // Arrange
         var after = new DateTimeOffset(2021, 07, 24, 0, 0, 0, TimeSpan.Zero);
@@ -122,8 +134,7 @@ public class DateRangeSpecs
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
-        var timestamps = Json
-            .Parse(await File.ReadAllTextAsync(file.Path))
+        var timestamps = Json.Parse(await File.ReadAllTextAsync(file.Path))
             .GetProperty("messages")
             .EnumerateArray()
             .Select(j => j.GetProperty("timestamp").GetDateTimeOffset())
@@ -131,19 +142,26 @@ public class DateRangeSpecs
 
         timestamps.All(t => t < before && t > after).Should().BeTrue();
 
-        timestamps.Should().BeEquivalentTo(new[]
-        {
-            new DateTimeOffset(2021, 07, 24, 13, 49, 13, TimeSpan.Zero),
-            new DateTimeOffset(2021, 07, 24, 14, 52, 38, TimeSpan.Zero),
-            new DateTimeOffset(2021, 07, 24, 14, 52, 39, TimeSpan.Zero),
-            new DateTimeOffset(2021, 07, 24, 14, 52, 40, TimeSpan.Zero)
-        }, o =>
-        {
-            return o
-                .Using<DateTimeOffset>(ctx =>
-                    ctx.Subject.Should().BeCloseTo(ctx.Expectation, TimeSpan.FromSeconds(1))
-                )
-                .WhenTypeIs<DateTimeOffset>();
-        });
+        timestamps
+            .Should()
+            .BeEquivalentTo(
+                new[]
+                {
+                    new DateTimeOffset(2021, 07, 24, 13, 49, 13, TimeSpan.Zero),
+                    new DateTimeOffset(2021, 07, 24, 14, 52, 38, TimeSpan.Zero),
+                    new DateTimeOffset(2021, 07, 24, 14, 52, 39, TimeSpan.Zero),
+                    new DateTimeOffset(2021, 07, 24, 14, 52, 40, TimeSpan.Zero)
+                },
+                o =>
+                {
+                    return o.Using<DateTimeOffset>(
+                            ctx =>
+                                ctx.Subject
+                                    .Should()
+                                    .BeCloseTo(ctx.Expectation, TimeSpan.FromSeconds(1))
+                        )
+                        .WhenTypeIs<DateTimeOffset>();
+                }
+            );
     }
-}
+}

DiscordChatExporter.Cli.Tests/Specs/FilterSpecs.cs

@@ -16,7 +16,7 @@ namespace DiscordChatExporter.Cli.Tests.Specs;
 public class FilterSpecs
 {
     [Fact]
-    public async Task Messages_filtered_by_text_only_include_messages_that_contain_that_text()
+    public async Task I_can_filter_the_export_to_only_include_messages_that_contain_the_specified_text()
     {
         // Arrange
         using var file = TempFile.Create();
@@ -32,8 +32,7 @@ public class FilterSpecs
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
-        Json
-            .Parse(await File.ReadAllTextAsync(file.Path))
+        Json.Parse(await File.ReadAllTextAsync(file.Path))
             .GetProperty("messages")
             .EnumerateArray()
             .Select(j => j.GetProperty("content").GetString())
@@ -42,7 +41,7 @@ public class FilterSpecs
     }
 
     [Fact]
-    public async Task Messages_filtered_by_author_only_include_messages_sent_by_that_author()
+    public async Task I_can_filter_the_export_to_only_include_messages_that_were_sent_by_the_specified_author()
     {
         // Arrange
         using var file = TempFile.Create();
@@ -58,17 +57,16 @@ public class FilterSpecs
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
-        Json
-            .Parse(await File.ReadAllTextAsync(file.Path))
+        Json.Parse(await File.ReadAllTextAsync(file.Path))
             .GetProperty("messages")
             .EnumerateArray()
             .Select(j => j.GetProperty("author").GetProperty("name").GetString())
             .Should()
-            .AllBe("Tyrrrz");
+            .AllBe("tyrrrz");
     }
 
     [Fact]
-    public async Task Messages_filtered_by_content_only_include_messages_that_have_that_content()
+    public async Task I_can_filter_the_export_to_only_include_messages_that_contain_the_specified_content()
     {
         // Arrange
         using var file = TempFile.Create();
@@ -84,8 +82,7 @@ public class FilterSpecs
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
-        Json
-            .Parse(await File.ReadAllTextAsync(file.Path))
+        Json.Parse(await File.ReadAllTextAsync(file.Path))
             .GetProperty("messages")
             .EnumerateArray()
             .Select(j => j.GetProperty("content").GetString())
@@ -94,7 +91,7 @@ public class FilterSpecs
     }
 
     [Fact]
-    public async Task Messages_filtered_by_pin_only_include_messages_that_have_been_pinned()
+    public async Task I_can_filter_the_export_to_only_include_messages_that_have_been_pinned()
     {
         // Arrange
         using var file = TempFile.Create();
@@ -110,8 +107,7 @@ public class FilterSpecs
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
-        Json
-            .Parse(await File.ReadAllTextAsync(file.Path))
+        Json.Parse(await File.ReadAllTextAsync(file.Path))
             .GetProperty("messages")
             .EnumerateArray()
             .Select(j => j.GetProperty("content").GetString())
@@ -120,7 +116,7 @@ public class FilterSpecs
     }
 
     [Fact]
-    public async Task Messages_filtered_by_mention_only_include_messages_that_have_that_mention()
+    public async Task I_can_filter_the_export_to_only_include_messages_that_contain_the_specified_mention()
     {
         // Arrange
         using var file = TempFile.Create();
@@ -136,12 +132,11 @@ public class FilterSpecs
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
-        Json
-            .Parse(await File.ReadAllTextAsync(file.Path))
+        Json.Parse(await File.ReadAllTextAsync(file.Path))
             .GetProperty("messages")
             .EnumerateArray()
             .Select(j => j.GetProperty("content").GetString())
             .Should()
             .ContainSingle("This has mention");
     }
-}
+}

DiscordChatExporter.Cli.Tests/Specs/HtmlAttachmentSpecs.cs

@@ -11,7 +11,7 @@ namespace DiscordChatExporter.Cli.Tests.Specs;
 public class HtmlAttachmentSpecs
 {
     [Fact]
-    public async Task Message_with_a_generic_attachment_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_generic_attachment()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsHtmlAsync(
@@ -20,11 +20,7 @@ public class HtmlAttachmentSpecs
         );
 
         // Assert
-        message.Text().Should().ContainAll(
-            "Generic file attachment",
-            "Test.txt",
-            "11 bytes"
-        );
+        message.Text().Should().ContainAll("Generic file attachment", "Test.txt", "11 bytes");
 
         message
             .QuerySelectorAll("a")
@@ -36,7 +32,7 @@ public class HtmlAttachmentSpecs
     }
 
     [Fact]
-    public async Task Message_with_an_image_attachment_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_an_image_attachment()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsHtmlAsync(
@@ -57,7 +53,7 @@ public class HtmlAttachmentSpecs
     }
 
     [Fact]
-    public async Task Message_with_a_video_attachment_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_video_attachment()
     {
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/333
 
@@ -71,13 +67,15 @@ public class HtmlAttachmentSpecs
         message.Text().Should().Contain("Video attachment");
 
         var videoUrl = message.QuerySelector("video source")?.GetAttribute("src");
-        videoUrl.Should().Be(
-            "https://cdn.discordapp.com/attachments/885587741654536192/885655761512968233/file_example_MP4_640_3MG.mp4"
-        );
+        videoUrl
+            .Should()
+            .Be(
+                "https://cdn.discordapp.com/attachments/885587741654536192/885655761512968233/file_example_MP4_640_3MG.mp4"
+            );
     }
 
     [Fact]
-    public async Task Message_with_an_audio_attachment_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_an_audio_attachment()
     {
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/333
 
@@ -91,8 +89,10 @@ public class HtmlAttachmentSpecs
         message.Text().Should().Contain("Audio attachment");
 
         var audioUrl = message.QuerySelector("audio source")?.GetAttribute("src");
-        audioUrl.Should().Be(
-            "https://cdn.discordapp.com/attachments/885587741654536192/885656175348187146/file_example_MP3_1MG.mp3"
-        );
+        audioUrl
+            .Should()
+            .Be(
+                "https://cdn.discordapp.com/attachments/885587741654536192/885656175348187146/file_example_MP3_1MG.mp3"
+            );
     }
-}
+}

DiscordChatExporter.Cli.Tests/Specs/HtmlContentSpecs.cs

@@ -2,7 +2,6 @@
 using System.Threading.Tasks;
 using AngleSharp.Dom;
 using DiscordChatExporter.Cli.Tests.Infra;
-using DiscordChatExporter.Core.Discord;
 using FluentAssertions;
 using Xunit;
 
@@ -11,49 +10,38 @@ namespace DiscordChatExporter.Cli.Tests.Specs;
 public class HtmlContentSpecs
 {
     [Fact]
-    public async Task Messages_are_exported_correctly()
+    public async Task I_can_export_a_channel_in_the_HTML_format()
     {
         // Act
         var messages = await ExportWrapper.GetMessagesAsHtmlAsync(ChannelIds.DateRangeTestCases);
 
         // Assert
-        messages.Select(e => e.GetAttribute("data-message-id")).Should().Equal(
-            "866674314627121232",
-            "866710679758045195",
-            "866732113319428096",
-            "868490009366396958",
-            "868505966528835604",
-            "868505969821364245",
-            "868505973294268457",
-            "885169254029213696"
-        );
+        messages
+            .Select(e => e.GetAttribute("data-message-id"))
+            .Should()
+            .Equal(
+                "866674314627121232",
+                "866710679758045195",
+                "866732113319428096",
+                "868490009366396958",
+                "868505966528835604",
+                "868505969821364245",
+                "868505973294268457",
+                "885169254029213696"
+            );
 
-        messages.SelectMany(e => e.Text()).Should().ContainInOrder(
-            "Hello world",
-            "Goodbye world",
-            "Foo bar",
-            "Hurdle Durdle",
-            "One",
-            "Two",
-            "Three",
-            "Yeet"
-        );
+        messages
+            .SelectMany(e => e.Text())
+            .Should()
+            .ContainInOrder(
+                "Hello world",
+                "Goodbye world",
+                "Foo bar",
+                "Hurdle Durdle",
+                "One",
+                "Two",
+                "Three",
+                "Yeet"
+            );
     }
-
-    [Fact]
-    public async Task Messages_cross_posted_from_other_guilds_are_rendered_with_the_server_tag()
-    {
-        // https://github.com/Tyrrrz/DiscordChatExporter/issues/633
-
-        // Act
-        var message = await ExportWrapper.GetMessageAsHtmlAsync(
-            ChannelIds.ReplyTestCases,
-            Snowflake.Parse("1072165330853576876")
-        );
-
-        // Assert
-        message.Text().Should().Contain("This is a test message from an announcement channel on another server");
-        message.Text().Should().Contain("SERVER");
-        message.QuerySelector(".chatlog__reply-link").Should().BeNull();
-    }
-}
+}

DiscordChatExporter.Cli.Tests/Specs/HtmlEmbedSpecs.cs

@@ -3,6 +3,7 @@ using System.Threading.Tasks;
 using AngleSharp.Dom;
 using DiscordChatExporter.Cli.Tests.Infra;
 using DiscordChatExporter.Core.Discord;
+using DiscordChatExporter.Core.Utils.Extensions;
 using FluentAssertions;
 using Xunit;
 
@@ -11,7 +12,7 @@ namespace DiscordChatExporter.Cli.Tests.Specs;
 public class HtmlEmbedSpecs
 {
     [Fact]
-    public async Task Message_with_an_embed_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_rich_embed()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsHtmlAsync(
@@ -20,19 +21,25 @@ public class HtmlEmbedSpecs
         );
 
         // Assert
-        message.Text().Should().ContainAll(
-            "Embed author",
-            "Embed title",
-            "Embed description",
-            "Field 1", "Value 1",
-            "Field 2", "Value 2",
-            "Field 3", "Value 3",
-            "Embed footer"
-        );
+        message
+            .Text()
+            .Should()
+            .ContainAll(
+                "Embed author",
+                "Embed title",
+                "Embed description",
+                "Field 1",
+                "Value 1",
+                "Field 2",
+                "Value 2",
+                "Field 3",
+                "Value 3",
+                "Embed footer"
+            );
     }
 
     [Fact]
-    public async Task Message_with_an_image_link_is_rendered_with_an_image_embed()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_an_image_embed()
     {
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/537
 
@@ -46,13 +53,14 @@ public class HtmlEmbedSpecs
         message
             .QuerySelectorAll("img")
             .Select(e => e.GetAttribute("src"))
-            .Where(s => s?.EndsWith("i.redd.it/f8w05ja8s4e61.png") ?? false)
+            .WhereNotNull()
+            .Where(s => s.EndsWith("f8w05ja8s4e61.png"))
             .Should()
             .ContainSingle();
     }
 
     [Fact]
-    public async Task Message_with_an_image_link_and_nothing_else_is_rendered_without_text_content()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_an_image_embed_and_the_text_is_hidden_if_it_only_contains_the_image_link()
     {
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/682
 
@@ -68,7 +76,31 @@ public class HtmlEmbedSpecs
     }
 
     [Fact]
-    public async Task Message_with_a_GIFV_link_is_rendered_with_a_video_embed()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_video_embed()
+    {
+        // Act
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
+            ChannelIds.EmbedTestCases,
+            Snowflake.Parse("1083751036596002856")
+        );
+
+        // Assert
+        message
+            .QuerySelectorAll("source")
+            .Select(e => e.GetAttribute("src"))
+            .WhereNotNull()
+            .Where(
+                s =>
+                    s.EndsWith(
+                        "i_am_currently_feeling_slight_displeasure_of_what_you_have_just_sent_lqrem.mp4"
+                    )
+            )
+            .Should()
+            .ContainSingle();
+    }
+
+    [Fact]
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_GIFV_embed()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsHtmlAsync(
@@ -80,13 +112,14 @@ public class HtmlEmbedSpecs
         message
             .QuerySelectorAll("source")
             .Select(e => e.GetAttribute("src"))
-            .Where(s => s?.EndsWith("media.tenor.com/DDAJeW6BQKkAAAPo/tooncasm-test-copy.mp4") ?? false)
+            .WhereNotNull()
+            .Where(s => s.EndsWith("tooncasm-test-copy.mp4"))
             .Should()
             .ContainSingle();
     }
 
     [Fact]
-    public async Task Message_with_a_GIFV_link_and_nothing_else_is_rendered_without_text_content()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_GIFV_embed_and_the_text_is_hidden_if_it_only_contains_the_video_link()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsHtmlAsync(
@@ -100,7 +133,7 @@ public class HtmlEmbedSpecs
     }
 
     [Fact]
-    public async Task Message_with_a_Spotify_track_link_is_rendered_with_a_track_embed()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_Spotify_track_embed()
     {
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/657
 
@@ -116,7 +149,7 @@ public class HtmlEmbedSpecs
     }
 
     [Fact]
-    public async Task Message_with_a_YouTube_video_link_is_rendered_with_a_video_embed()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_YouTube_video_embed()
     {
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/570
 
@@ -132,7 +165,7 @@ public class HtmlEmbedSpecs
     }
 
     [Fact]
-    public async Task Message_with_a_Twitter_post_link_with_multiple_images_is_rendered_as_a_single_embed()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_Twitter_post_embed_that_includes_multiple_images()
     {
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/695
 
@@ -158,7 +191,7 @@ public class HtmlEmbedSpecs
     }
 
     [Fact]
-    public async Task Message_with_a_guild_invite_link_is_rendered_with_a_widget()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_guild_invite()
     {
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/649
 
@@ -171,4 +204,4 @@ public class HtmlEmbedSpecs
         // Assert
         message.Text().Should().Contain("DiscordChatExporter TestServer");
     }
-}
+}

DiscordChatExporter.Cli.Tests/Specs/HtmlGroupingSpecs.cs

@@ -15,7 +15,7 @@ namespace DiscordChatExporter.Cli.Tests.Specs;
 public class HtmlGroupingSpecs
 {
     [Fact]
-    public async Task Messages_are_grouped_correctly()
+    public async Task I_can_export_a_channel_and_the_messages_are_grouped_according_to_their_author_and_timestamps()
     {
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/152
 
@@ -32,8 +32,7 @@ public class HtmlGroupingSpecs
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
-        var messageGroups = Html
-            .Parse(await File.ReadAllTextAsync(file.Path))
+        var messageGroups = Html.Parse(await File.ReadAllTextAsync(file.Path))
             .QuerySelectorAll(".chatlog__message-group");
 
         messageGroups.Should().HaveCount(2);
@@ -59,12 +58,6 @@ public class HtmlGroupingSpecs
             .QuerySelectorAll(".chatlog__content")
             .Select(e => e.Text())
             .Should()
-            .ContainInOrder(
-                "Eleventh",
-                "Twelveth",
-                "Thirteenth",
-                "Fourteenth",
-                "Fifteenth"
-            );
+            .ContainInOrder("Eleventh", "Twelveth", "Thirteenth", "Fourteenth", "Fifteenth");
     }
-}
+}

DiscordChatExporter.Cli.Tests/Specs/HtmlMarkdownSpecs.cs

@@ -1,8 +1,6 @@
-using System;
-using System.Threading.Tasks;
+using System.Threading.Tasks;
 using AngleSharp.Dom;
 using DiscordChatExporter.Cli.Tests.Infra;
-using DiscordChatExporter.Cli.Tests.Utils;
 using DiscordChatExporter.Core.Discord;
 using FluentAssertions;
 using Xunit;
@@ -12,217 +10,130 @@ namespace DiscordChatExporter.Cli.Tests.Specs;
 public class HtmlMarkdownSpecs
 {
     [Fact]
-    public async Task Message_with_a_timestamp_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_timestamp_marker()
     {
-        // Date formatting code relies on the local time zone, so we need to set it to a fixed value
-        TimeZoneInfoEx.SetLocal(TimeSpan.FromHours(+2));
+        // Act
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
+            ChannelIds.MarkdownTestCases,
+            Snowflake.Parse("1074323136411078787")
+        );
 
-        try
-        {
-            // Act
-            var message = await ExportWrapper.GetMessageAsHtmlAsync(
-                ChannelIds.MarkdownTestCases,
-                Snowflake.Parse("1074323136411078787")
-            );
-
-            // Assert
-            message.Text().Should().Contain("Default timestamp: 02/12/2023 3:36 PM");
-            message.InnerHtml.Should().Contain("Sunday, February 12, 2023 3:36 PM");
-        }
-        finally
-        {
-            TimeZoneInfo.ClearCachedData();
-        }
+        // Assert
+        message.Text().Should().Contain("Default timestamp: 2/12/2023 1:36 PM");
+        message.InnerHtml.Should().Contain("Sunday, February 12, 2023 1:36 PM");
     }
 
     [Fact]
-    public async Task Message_with_a_short_time_timestamp_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_timestamp_marker_in_the_short_format()
     {
-        // Date formatting code relies on the local time zone, so we need to set it to a fixed value
-        TimeZoneInfoEx.SetLocal(TimeSpan.FromHours(+2));
+        // Act
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
+            ChannelIds.MarkdownTestCases,
+            Snowflake.Parse("1074323205268967596")
+        );
 
-        try
-        {
-            // Act
-            var message = await ExportWrapper.GetMessageAsHtmlAsync(
-                ChannelIds.MarkdownTestCases,
-                Snowflake.Parse("1074323205268967596")
-            );
-
-            // Assert
-            message.Text().Should().Contain("Short time timestamp: 3:36 PM");
-            message.InnerHtml.Should().Contain("Sunday, February 12, 2023 3:36 PM");
-        }
-        finally
-        {
-            TimeZoneInfo.ClearCachedData();
-        }
+        // Assert
+        message.Text().Should().Contain("Short time timestamp: 1:36 PM");
+        message.InnerHtml.Should().Contain("Sunday, February 12, 2023 1:36 PM");
     }
 
     [Fact]
-    public async Task Message_with_a_long_time_timestamp_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_timestamp_marker_in_the_long_format()
     {
-        // Date formatting code relies on the local time zone, so we need to set it to a fixed value
-        TimeZoneInfoEx.SetLocal(TimeSpan.FromHours(+2));
+        // Act
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
+            ChannelIds.MarkdownTestCases,
+            Snowflake.Parse("1074323235342139483")
+        );
 
-        try
-        {
-            // Act
-            var message = await ExportWrapper.GetMessageAsHtmlAsync(
-                ChannelIds.MarkdownTestCases,
-                Snowflake.Parse("1074323235342139483")
-            );
-
-            // Assert
-            message.Text().Should().Contain("Long time timestamp: 3:36:12 PM");
-            message.InnerHtml.Should().Contain("Sunday, February 12, 2023 3:36 PM");
-        }
-        finally
-        {
-            TimeZoneInfo.ClearCachedData();
-        }
+        // Assert
+        message.Text().Should().Contain("Long time timestamp: 1:36:12 PM");
+        message.InnerHtml.Should().Contain("Sunday, February 12, 2023 1:36 PM");
     }
 
     [Fact]
-    public async Task Message_with_a_short_date_timestamp_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_timestamp_marker_in_the_short_date_format()
     {
-        // Date formatting code relies on the local time zone, so we need to set it to a fixed value
-        TimeZoneInfoEx.SetLocal(TimeSpan.FromHours(+2));
+        // Act
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
+            ChannelIds.MarkdownTestCases,
+            Snowflake.Parse("1074323326727634984")
+        );
 
-        try
-        {
-            // Act
-            var message = await ExportWrapper.GetMessageAsHtmlAsync(
-                ChannelIds.MarkdownTestCases,
-                Snowflake.Parse("1074323326727634984")
-            );
-
-            // Assert
-            message.Text().Should().Contain("Short date timestamp: 02/12/2023");
-            message.InnerHtml.Should().Contain("Sunday, February 12, 2023 3:36 PM");
-        }
-        finally
-        {
-            TimeZoneInfo.ClearCachedData();
-        }
+        // Assert
+        message.Text().Should().Contain("Short date timestamp: 2/12/2023");
+        message.InnerHtml.Should().Contain("Sunday, February 12, 2023 1:36 PM");
     }
 
     [Fact]
-    public async Task Message_with_a_long_date_timestamp_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_timestamp_marker_in_the_long_date_format()
     {
-        // Date formatting code relies on the local time zone, so we need to set it to a fixed value
-        TimeZoneInfoEx.SetLocal(TimeSpan.FromHours(+2));
+        // Act
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
+            ChannelIds.MarkdownTestCases,
+            Snowflake.Parse("1074323350731640863")
+        );
 
-        try
-        {
-            // Act
-            var message = await ExportWrapper.GetMessageAsHtmlAsync(
-                ChannelIds.MarkdownTestCases,
-                Snowflake.Parse("1074323350731640863")
-            );
-
-            // Assert
-            message.Text().Should().Contain("Long date timestamp: February 12, 2023");
-            message.InnerHtml.Should().Contain("Sunday, February 12, 2023 3:36 PM");
-        }
-        finally
-        {
-            TimeZoneInfo.ClearCachedData();
-        }
+        // Assert
+        message.Text().Should().Contain("Long date timestamp: Sunday, February 12, 2023");
+        message.InnerHtml.Should().Contain("Sunday, February 12, 2023 1:36 PM");
     }
 
     [Fact]
-    public async Task Message_with_a_full_timestamp_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_timestamp_marker_in_the_full_format()
     {
-        // Date formatting code relies on the local time zone, so we need to set it to a fixed value
-        TimeZoneInfoEx.SetLocal(TimeSpan.FromHours(+2));
+        // Act
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
+            ChannelIds.MarkdownTestCases,
+            Snowflake.Parse("1074323374379118593")
+        );
 
-        try
-        {
-            // Act
-            var message = await ExportWrapper.GetMessageAsHtmlAsync(
-                ChannelIds.MarkdownTestCases,
-                Snowflake.Parse("1074323374379118593")
-            );
-
-            // Assert
-            message.Text().Should().Contain("Full timestamp: February 12, 2023 3:36 PM");
-            message.InnerHtml.Should().Contain("Sunday, February 12, 2023 3:36 PM");
-        }
-        finally
-        {
-            TimeZoneInfo.ClearCachedData();
-        }
+        // Assert
+        message.Text().Should().Contain("Full timestamp: Sunday, February 12, 2023 1:36 PM");
+        message.InnerHtml.Should().Contain("Sunday, February 12, 2023 1:36 PM");
     }
 
     [Fact]
-    public async Task Message_with_a_full_long_timestamp_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_timestamp_marker_in_the_full_long_format()
     {
-        // Date formatting code relies on the local time zone, so we need to set it to a fixed value
-        TimeZoneInfoEx.SetLocal(TimeSpan.FromHours(+2));
+        // Act
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
+            ChannelIds.MarkdownTestCases,
+            Snowflake.Parse("1074323409095376947")
+        );
 
-        try
-        {
-            // Act
-            var message = await ExportWrapper.GetMessageAsHtmlAsync(
-                ChannelIds.MarkdownTestCases,
-                Snowflake.Parse("1074323409095376947")
-            );
-
-            // Assert
-            message.Text().Should().Contain("Full long timestamp: Sunday, February 12, 2023 3:36 PM");
-            message.InnerHtml.Should().Contain("Sunday, February 12, 2023 3:36 PM");
-        }
-        finally
-        {
-            TimeZoneInfo.ClearCachedData();
-        }
+        // Assert
+        message
+            .Text()
+            .Should()
+            .Contain("Full long timestamp: Sunday, February 12, 2023 1:36:12 PM");
+        message.InnerHtml.Should().Contain("Sunday, February 12, 2023 1:36 PM");
     }
 
     [Fact]
-    public async Task Message_with_a_relative_timestamp_is_rendered_as_the_default_timestamp()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_timestamp_marker_in_the_relative_format()
     {
-        // Date formatting code relies on the local time zone, so we need to set it to a fixed value
-        TimeZoneInfoEx.SetLocal(TimeSpan.FromHours(+2));
+        // Act
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
+            ChannelIds.MarkdownTestCases,
+            Snowflake.Parse("1074323436853285004")
+        );
 
-        try
-        {
-            // Act
-            var message = await ExportWrapper.GetMessageAsHtmlAsync(
-                ChannelIds.MarkdownTestCases,
-                Snowflake.Parse("1074323436853285004")
-            );
-
-            // Assert
-            message.Text().Should().Contain("Relative timestamp: 02/12/2023 3:36 PM");
-            message.InnerHtml.Should().Contain("Sunday, February 12, 2023 3:36 PM");
-        }
-        finally
-        {
-            TimeZoneInfo.ClearCachedData();
-        }
+        // Assert
+        message.Text().Should().Contain("Relative timestamp: 2/12/2023 1:36 PM");
+        message.InnerHtml.Should().Contain("Sunday, February 12, 2023 1:36 PM");
     }
 
     [Fact]
-    public async Task Message_with_an_invalid_timestamp_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_an_invalid_timestamp_marker()
     {
-        // Date formatting code relies on the local time zone, so we need to set it to a fixed value
-        TimeZoneInfoEx.SetLocal(TimeSpan.FromHours(+2));
+        // Act
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
+            ChannelIds.MarkdownTestCases,
+            Snowflake.Parse("1074328534409019563")
+        );
 
-        try
-        {
-            // Act
-            var message = await ExportWrapper.GetMessageAsHtmlAsync(
-                ChannelIds.MarkdownTestCases,
-                Snowflake.Parse("1074328534409019563")
-            );
-
-            // Assert
-            message.Text().Should().Contain("Invalid timestamp: Invalid date");
-        }
-        finally
-        {
-            TimeZoneInfo.ClearCachedData();
-        }
+        // Assert
+        message.Text().Should().Contain("Invalid timestamp: Invalid date");
     }
-}
+}

DiscordChatExporter.Cli.Tests/Specs/HtmlMentionSpecs.cs

@@ -10,7 +10,7 @@ namespace DiscordChatExporter.Cli.Tests.Specs;
 public class HtmlMentionSpecs
 {
     [Fact]
-    public async Task Message_with_a_user_mention_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_user_mention()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsHtmlAsync(
@@ -20,11 +20,11 @@ public class HtmlMentionSpecs
 
         // Assert
         message.Text().Should().Contain("User mention: @Tyrrrz");
-        message.InnerHtml.Should().Contain("Tyrrrz#5447");
+        message.InnerHtml.Should().Contain("tyrrrz");
     }
 
     [Fact]
-    public async Task Message_with_a_text_channel_mention_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_text_channel_mention()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsHtmlAsync(
@@ -37,7 +37,7 @@ public class HtmlMentionSpecs
     }
 
     [Fact]
-    public async Task Message_with_a_voice_channel_mention_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_voice_channel_mention()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsHtmlAsync(
@@ -50,7 +50,7 @@ public class HtmlMentionSpecs
     }
 
     [Fact]
-    public async Task Message_with_a_role_mention_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_role_mention()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsHtmlAsync(
@@ -61,4 +61,4 @@ public class HtmlMentionSpecs
         // Assert
         message.Text().Should().Contain("Role mention: @Role 1");
     }
-}
+}

DiscordChatExporter.Cli.Tests/Specs/HtmlReplySpecs.cs

@@ -10,7 +10,7 @@ namespace DiscordChatExporter.Cli.Tests.Specs;
 public class HtmlReplySpecs
 {
     [Fact]
-    public async Task Message_with_a_reply_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_that_replies_to_another_message()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsHtmlAsync(
@@ -24,7 +24,7 @@ public class HtmlReplySpecs
     }
 
     [Fact]
-    public async Task Message_with_a_reply_to_a_deleted_message_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_that_replies_to_a_deleted_message()
     {
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/645
 
@@ -36,13 +36,15 @@ public class HtmlReplySpecs
 
         // Assert
         message.Text().Should().Contain("reply to deleted");
-        message.QuerySelector(".chatlog__reply-link")?.Text().Should().Contain(
-            "Original message was deleted or could not be loaded."
-        );
+        message
+            .QuerySelector(".chatlog__reply-link")
+            ?.Text()
+            .Should()
+            .Contain("Original message was deleted or could not be loaded.");
     }
 
     [Fact]
-    public async Task Message_with_a_reply_to_an_empty_message_with_attachment_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_that_replies_to_an_empty_message_with_an_attachment()
     {
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/634
 
@@ -54,11 +56,15 @@ public class HtmlReplySpecs
 
         // Assert
         message.Text().Should().Contain("reply to attachment");
-        message.QuerySelector(".chatlog__reply-link")?.Text().Should().Contain("Click to see attachment");
+        message
+            .QuerySelector(".chatlog__reply-link")
+            ?.Text()
+            .Should()
+            .Contain("Click to see attachment");
     }
 
     [Fact]
-    public async Task Message_with_a_reply_to_an_interaction_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_that_replies_to_an_interaction()
     {
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/569
 
@@ -71,4 +77,24 @@ public class HtmlReplySpecs
         // Assert
         message.Text().Should().Contain("used /poll");
     }
-}
+
+    [Fact]
+    public async Task I_can_export_a_channel_that_contains_a_message_cross_posted_from_another_guild()
+    {
+        // https://github.com/Tyrrrz/DiscordChatExporter/issues/633
+
+        // Act
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
+            ChannelIds.ReplyTestCases,
+            Snowflake.Parse("1072165330853576876")
+        );
+
+        // Assert
+        message
+            .Text()
+            .Should()
+            .Contain("This is a test message from an announcement channel on another server");
+        message.Text().Should().Contain("SERVER");
+        message.QuerySelector(".chatlog__reply-link").Should().BeNull();
+    }
+}

DiscordChatExporter.Cli.Tests/Specs/HtmlStickerSpecs.cs

@@ -9,7 +9,7 @@ namespace DiscordChatExporter.Cli.Tests.Specs;
 public class HtmlStickerSpecs
 {
     [Fact]
-    public async Task Message_with_a_PNG_based_sticker_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_PNG_sticker()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsHtmlAsync(
@@ -23,7 +23,7 @@ public class HtmlStickerSpecs
     }
 
     [Fact]
-    public async Task Message_with_a_Lottie_based_sticker_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_Lottie_sticker()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsHtmlAsync(
@@ -32,7 +32,9 @@ public class HtmlStickerSpecs
         );
 
         // Assert
-        var stickerUrl = message.QuerySelector("[title='Yikes'] [data-source]")?.GetAttribute("data-source");
+        var stickerUrl = message
+            .QuerySelector("[title='Yikes'] [data-source]")
+            ?.GetAttribute("data-source");
         stickerUrl.Should().Be("https://cdn.discordapp.com/stickers/816087132447178774.json");
     }
-}
+}

DiscordChatExporter.Cli.Tests/Specs/JsonAttachmentSpecs.cs

@@ -10,7 +10,7 @@ namespace DiscordChatExporter.Cli.Tests.Specs;
 public class JsonAttachmentSpecs
 {
     [Fact]
-    public async Task Message_with_a_generic_attachment_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_generic_attachment()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsJsonAsync(
@@ -23,15 +23,20 @@ public class JsonAttachmentSpecs
 
         var attachments = message.GetProperty("attachments").EnumerateArray().ToArray();
         attachments.Should().HaveCount(1);
-        attachments.Single().GetProperty("url").GetString().Should().Be(
-            "https://cdn.discordapp.com/attachments/885587741654536192/885587844964417596/Test.txt"
-        );
-        attachments.Single().GetProperty("fileName").GetString().Should().Be("Test.txt");
-        attachments.Single().GetProperty("fileSizeBytes").GetInt64().Should().Be(11);
+
+        attachments[0]
+            .GetProperty("url")
+            .GetString()
+            .Should()
+            .Be(
+                "https://cdn.discordapp.com/attachments/885587741654536192/885587844964417596/Test.txt"
+            );
+        attachments[0].GetProperty("fileName").GetString().Should().Be("Test.txt");
+        attachments[0].GetProperty("fileSizeBytes").GetInt64().Should().Be(11);
     }
 
     [Fact]
-    public async Task Message_with_an_image_attachment_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_an_image_attachment()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsJsonAsync(
@@ -44,15 +49,20 @@ public class JsonAttachmentSpecs
 
         var attachments = message.GetProperty("attachments").EnumerateArray().ToArray();
         attachments.Should().HaveCount(1);
-        attachments.Single().GetProperty("url").GetString().Should().Be(
-            "https://cdn.discordapp.com/attachments/885587741654536192/885654862430359613/bird-thumbnail.png"
-        );
-        attachments.Single().GetProperty("fileName").GetString().Should().Be("bird-thumbnail.png");
-        attachments.Single().GetProperty("fileSizeBytes").GetInt64().Should().Be(466335);
+
+        attachments[0]
+            .GetProperty("url")
+            .GetString()
+            .Should()
+            .Be(
+                "https://cdn.discordapp.com/attachments/885587741654536192/885654862430359613/bird-thumbnail.png"
+            );
+        attachments[0].GetProperty("fileName").GetString().Should().Be("bird-thumbnail.png");
+        attachments[0].GetProperty("fileSizeBytes").GetInt64().Should().Be(466335);
     }
 
     [Fact]
-    public async Task Message_with_a_video_attachment_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_video_attachment()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsJsonAsync(
@@ -65,15 +75,24 @@ public class JsonAttachmentSpecs
 
         var attachments = message.GetProperty("attachments").EnumerateArray().ToArray();
         attachments.Should().HaveCount(1);
-        attachments.Single().GetProperty("url").GetString().Should().Be(
-            "https://cdn.discordapp.com/attachments/885587741654536192/885655761512968233/file_example_MP4_640_3MG.mp4"
-        );
-        attachments.Single().GetProperty("fileName").GetString().Should().Be("file_example_MP4_640_3MG.mp4");
-        attachments.Single().GetProperty("fileSizeBytes").GetInt64().Should().Be(3114374);
+
+        attachments[0]
+            .GetProperty("url")
+            .GetString()
+            .Should()
+            .Be(
+                "https://cdn.discordapp.com/attachments/885587741654536192/885655761512968233/file_example_MP4_640_3MG.mp4"
+            );
+        attachments[0]
+            .GetProperty("fileName")
+            .GetString()
+            .Should()
+            .Be("file_example_MP4_640_3MG.mp4");
+        attachments[0].GetProperty("fileSizeBytes").GetInt64().Should().Be(3114374);
     }
 
     [Fact]
-    public async Task Message_with_an_audio_attachment_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_an_audio_attachment()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsJsonAsync(
@@ -86,10 +105,15 @@ public class JsonAttachmentSpecs
 
         var attachments = message.GetProperty("attachments").EnumerateArray().ToArray();
         attachments.Should().HaveCount(1);
-        attachments.Single().GetProperty("url").GetString().Should().Be(
-            "https://cdn.discordapp.com/attachments/885587741654536192/885656175348187146/file_example_MP3_1MG.mp3"
-        );
-        attachments.Single().GetProperty("fileName").GetString().Should().Be("file_example_MP3_1MG.mp3");
-        attachments.Single().GetProperty("fileSizeBytes").GetInt64().Should().Be(1087849);
+
+        attachments[0]
+            .GetProperty("url")
+            .GetString()
+            .Should()
+            .Be(
+                "https://cdn.discordapp.com/attachments/885587741654536192/885656175348187146/file_example_MP3_1MG.mp3"
+            );
+        attachments[0].GetProperty("fileName").GetString().Should().Be("file_example_MP3_1MG.mp3");
+        attachments[0].GetProperty("fileSizeBytes").GetInt64().Should().Be(1087849);
     }
-}
+}

DiscordChatExporter.Cli.Tests/Specs/JsonContentSpecs.cs

@@ -9,32 +9,38 @@ namespace DiscordChatExporter.Cli.Tests.Specs;
 public class JsonContentSpecs
 {
     [Fact]
-    public async Task Messages_are_exported_correctly()
+    public async Task I_can_export_a_channel_in_the_JSON_format()
     {
         // Act
         var messages = await ExportWrapper.GetMessagesAsJsonAsync(ChannelIds.DateRangeTestCases);
 
         // Assert
-        messages.Select(j => j.GetProperty("id").GetString()).Should().Equal(
-            "866674314627121232",
-            "866710679758045195",
-            "866732113319428096",
-            "868490009366396958",
-            "868505966528835604",
-            "868505969821364245",
-            "868505973294268457",
-            "885169254029213696"
-        );
+        messages
+            .Select(j => j.GetProperty("id").GetString())
+            .Should()
+            .Equal(
+                "866674314627121232",
+                "866710679758045195",
+                "866732113319428096",
+                "868490009366396958",
+                "868505966528835604",
+                "868505969821364245",
+                "868505973294268457",
+                "885169254029213696"
+            );
 
-        messages.Select(j => j.GetProperty("content").GetString()).Should().Equal(
-            "Hello world",
-            "Goodbye world",
-            "Foo bar",
-            "Hurdle Durdle",
-            "One",
-            "Two",
-            "Three",
-            "Yeet"
-        );
+        messages
+            .Select(j => j.GetProperty("content").GetString())
+            .Should()
+            .Equal(
+                "Hello world",
+                "Goodbye world",
+                "Foo bar",
+                "Hurdle Durdle",
+                "One",
+                "Two",
+                "Three",
+                "Yeet"
+            );
     }
-}
+}

DiscordChatExporter.Cli.Tests/Specs/JsonEmbedSpecs.cs

@@ -10,7 +10,7 @@ namespace DiscordChatExporter.Cli.Tests.Specs;
 public class JsonEmbedSpecs
 {
     [Fact]
-    public async Task Message_with_an_embed_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_rich_embed()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsJsonAsync(
@@ -52,4 +52,4 @@ public class JsonEmbedSpecs
         embedFields[2].GetProperty("value").GetString().Should().Be("Value 3");
         embedFields[2].GetProperty("isInline").GetBoolean().Should().BeTrue();
     }
-}
+}

DiscordChatExporter.Cli.Tests/Specs/JsonMentionSpecs.cs

@@ -10,7 +10,7 @@ namespace DiscordChatExporter.Cli.Tests.Specs;
 public class JsonMentionSpecs
 {
     [Fact]
-    public async Task Message_with_a_user_mention_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_user_mention()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsJsonAsync(
@@ -30,7 +30,7 @@ public class JsonMentionSpecs
     }
 
     [Fact]
-    public async Task Message_with_a_text_channel_mention_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_text_channel_mention()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsJsonAsync(
@@ -39,11 +39,15 @@ public class JsonMentionSpecs
         );
 
         // Assert
-        message.GetProperty("content").GetString().Should().Be("Text channel mention: #mention-tests");
+        message
+            .GetProperty("content")
+            .GetString()
+            .Should()
+            .Be("Text channel mention: #mention-tests");
     }
 
     [Fact]
-    public async Task Message_with_a_voice_channel_mention_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_voice_channel_mention()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsJsonAsync(
@@ -52,11 +56,15 @@ public class JsonMentionSpecs
         );
 
         // Assert
-        message.GetProperty("content").GetString().Should().Be("Voice channel mention: #general [voice]");
+        message
+            .GetProperty("content")
+            .GetString()
+            .Should()
+            .Be("Voice channel mention: #general [voice]");
     }
 
     [Fact]
-    public async Task Message_with_a_role_mention_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_role_mention()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsJsonAsync(
@@ -67,4 +75,4 @@ public class JsonMentionSpecs
         // Assert
         message.GetProperty("content").GetString().Should().Be("Role mention: @Role 1");
     }
-}
+}

DiscordChatExporter.Cli.Tests/Specs/JsonStickerSpecs.cs

@@ -10,7 +10,7 @@ namespace DiscordChatExporter.Cli.Tests.Specs;
 public class JsonStickerSpecs
 {
     [Fact]
-    public async Task Message_with_a_PNG_based_sticker_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_PNG_sticker()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsJsonAsync(
@@ -19,19 +19,20 @@ public class JsonStickerSpecs
         );
 
         // Assert
-        var sticker = message
-            .GetProperty("stickers")
-            .EnumerateArray()
-            .Single();
+        var sticker = message.GetProperty("stickers").EnumerateArray().Single();
 
         sticker.GetProperty("id").GetString().Should().Be("904215665597120572");
         sticker.GetProperty("name").GetString().Should().Be("rock");
         sticker.GetProperty("format").GetString().Should().Be("Apng");
-        sticker.GetProperty("sourceUrl").GetString().Should().Be("https://cdn.discordapp.com/stickers/904215665597120572.png");
+        sticker
+            .GetProperty("sourceUrl")
+            .GetString()
+            .Should()
+            .Be("https://cdn.discordapp.com/stickers/904215665597120572.png");
     }
 
     [Fact]
-    public async Task Message_with_a_Lottie_based_sticker_is_rendered_correctly()
+    public async Task I_can_export_a_channel_that_contains_a_message_with_a_Lottie_sticker()
     {
         // Act
         var message = await ExportWrapper.GetMessageAsJsonAsync(
@@ -40,14 +41,15 @@ public class JsonStickerSpecs
         );
 
         // Assert
-        var sticker = message
-            .GetProperty("stickers")
-            .EnumerateArray()
-            .Single();
+        var sticker = message.GetProperty("stickers").EnumerateArray().Single();
 
         sticker.GetProperty("id").GetString().Should().Be("816087132447178774");
         sticker.GetProperty("name").GetString().Should().Be("Yikes");
         sticker.GetProperty("format").GetString().Should().Be("Lottie");
-        sticker.GetProperty("sourceUrl").GetString().Should().Be("https://cdn.discordapp.com/stickers/816087132447178774.json");
+        sticker
+            .GetProperty("sourceUrl")
+            .GetString()
+            .Should()
+            .Be("https://cdn.discordapp.com/stickers/816087132447178774.json");
     }
-}
+}

DiscordChatExporter.Cli.Tests/Specs/PartitioningSpecs.cs

@@ -14,7 +14,7 @@ namespace DiscordChatExporter.Cli.Tests.Specs;
 public class PartitioningSpecs
 {
     [Fact]
-    public async Task Messages_partitioned_by_count_are_split_into_a_corresponding_number_of_files()
+    public async Task I_can_export_a_channel_with_partitioning_based_on_message_count()
     {
         // Arrange
         using var dir = TempDir.Create();
@@ -31,13 +31,11 @@ public class PartitioningSpecs
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
-        Directory.EnumerateFiles(dir.Path, "output*")
-            .Should()
-            .HaveCount(3);
+        Directory.EnumerateFiles(dir.Path, "output*").Should().HaveCount(3);
     }
 
     [Fact]
-    public async Task Messages_partitioned_by_file_size_are_split_into_a_corresponding_number_of_files()
+    public async Task I_can_export_a_channel_with_partitioning_based_on_file_size()
     {
         // Arrange
         using var dir = TempDir.Create();
@@ -54,8 +52,6 @@ public class PartitioningSpecs
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
-        Directory.EnumerateFiles(dir.Path, "output*")
-            .Should()
-            .HaveCount(8);
+        Directory.EnumerateFiles(dir.Path, "output*").Should().HaveCount(8);
     }
-}
+}

DiscordChatExporter.Cli.Tests/Specs/PlainTextContentSpecs.cs

@@ -8,22 +8,24 @@ namespace DiscordChatExporter.Cli.Tests.Specs;
 public class PlainTextContentSpecs
 {
     [Fact]
-    public async Task Messages_are_exported_correctly()
+    public async Task I_can_export_a_channel_in_the_TXT_format()
     {
         // Act
         var document = await ExportWrapper.ExportAsPlainTextAsync(ChannelIds.DateRangeTestCases);
 
         // Assert
-        document.Should().ContainAll(
-            "Tyrrrz#5447",
-            "Hello world",
-            "Goodbye world",
-            "Foo bar",
-            "Hurdle Durdle",
-            "One",
-            "Two",
-            "Three",
-            "Yeet"
-        );
+        document
+            .Should()
+            .ContainAll(
+                "tyrrrz",
+                "Hello world",
+                "Goodbye world",
+                "Foo bar",
+                "Hurdle Durdle",
+                "One",
+                "Two",
+                "Three",
+                "Yeet"
+            );
     }
-}
+}

DiscordChatExporter.Cli.Tests/Specs/SelfContainedSpecs.cs

@@ -14,7 +14,7 @@ namespace DiscordChatExporter.Cli.Tests.Specs;
 public class SelfContainedSpecs
 {
     [Fact]
-    public async Task Messages_in_self_contained_export_only_reference_local_file_resources()
+    public async Task I_can_export_a_channel_and_download_all_referenced_assets()
     {
         // Arrange
         using var dir = TempDir.Create();
@@ -31,8 +31,7 @@ public class SelfContainedSpecs
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
-        Html
-            .Parse(await File.ReadAllTextAsync(filePath))
+        Html.Parse(await File.ReadAllTextAsync(filePath))
             .QuerySelectorAll("body [src]")
             .Select(e => e.GetAttribute("src")!)
             .Select(f => Path.GetFullPath(f, dir.Path))
@@ -40,4 +39,4 @@ public class SelfContainedSpecs
             .Should()
             .BeTrue();
     }
-}
+}

DiscordChatExporter.Cli.Tests/Utils/Html.cs

@@ -8,4 +8,4 @@ internal static class Html
     private static readonly IHtmlParser Parser = new HtmlParser();
 
     public static IHtmlDocument Parse(string source) => Parser.ParseDocument(source);
-}
+}

DiscordChatExporter.Cli.Tests/Utils/TempDir.cs

@@ -9,8 +9,7 @@ internal partial class TempDir : IDisposable
 {
     public string Path { get; }
 
-    public TempDir(string path) =>
-        Path = path;
+    public TempDir(string path) => Path = path;
 
     public void Dispose()
     {
@@ -18,9 +17,7 @@ internal partial class TempDir : IDisposable
         {
             Directory.Delete(Path, true);
         }
-        catch (DirectoryNotFoundException)
-        {
-        }
+        catch (DirectoryNotFoundException) { }
     }
 }
 
@@ -29,7 +26,8 @@ internal partial class TempDir
     public static TempDir Create()
     {
         var dirPath = PathEx.Combine(
-            PathEx.GetDirectoryName(Assembly.GetExecutingAssembly().Location) ?? Directory.GetCurrentDirectory(),
+            PathEx.GetDirectoryName(Assembly.GetExecutingAssembly().Location)
+                ?? Directory.GetCurrentDirectory(),
             "Temp",
             Guid.NewGuid().ToString()
         );
@@ -38,4 +36,4 @@ internal partial class TempDir
 
         return new TempDir(dirPath);
     }
-}
+}

DiscordChatExporter.Cli.Tests/Utils/TempFile.cs

@@ -9,8 +9,7 @@ internal partial class TempFile : IDisposable
 {
     public string Path { get; }
 
-    public TempFile(string path) =>
-        Path = path;
+    public TempFile(string path) => Path = path;
 
     public void Dispose()
     {
@@ -18,9 +17,7 @@ internal partial class TempFile : IDisposable
         {
             File.Delete(Path);
         }
-        catch (FileNotFoundException)
-        {
-        }
+        catch (FileNotFoundException) { }
     }
 }
 
@@ -29,17 +26,15 @@ internal partial class TempFile
     public static TempFile Create()
     {
         var dirPath = PathEx.Combine(
-            PathEx.GetDirectoryName(Assembly.GetExecutingAssembly().Location) ?? Directory.GetCurrentDirectory(),
+            PathEx.GetDirectoryName(Assembly.GetExecutingAssembly().Location)
+                ?? Directory.GetCurrentDirectory(),
             "Temp"
         );
 
         Directory.CreateDirectory(dirPath);
 
-        var filePath = PathEx.Combine(
-            dirPath,
-            Guid.NewGuid() + ".tmp"
-        );
+        var filePath = PathEx.Combine(dirPath, Guid.NewGuid() + ".tmp");
 
         return new TempFile(filePath);
     }
-}
+}

DiscordChatExporter.Cli.Tests/Utils/TimeZoneInfoEx.cs

@@ -1,14 +0,0 @@
-using System;
-using ReflectionMagic;
-
-namespace DiscordChatExporter.Cli.Tests.Utils;
-
-internal static class TimeZoneInfoEx
-{
-    // https://stackoverflow.com/a/63700512/2205454
-    public static void SetLocal(TimeZoneInfo timeZone) =>
-        typeof(TimeZoneInfo).AsDynamicType().s_cachedData._localTimeZone = timeZone;
-
-    public static void SetLocal(TimeSpan offset) =>
-        SetLocal(TimeZoneInfo.CreateCustomTimeZone("test-tz", offset, "test-tz", "test-tz"));
-}

DiscordChatExporter.Cli.dockerfile

@@ -1,44 +1,46 @@
 # -- Build
-FROM mcr.microsoft.com/dotnet/sdk:7.0-alpine AS build
+# Specify the platform here so that we pull the SDK image matching the host platform,
+# instead of the target platform specified during build by the `--platform` option.
+# Use the .NET 8.0 preview because the `--arch` option is only available in that version.
+# https://github.com/dotnet/dotnet-docker/issues/4388#issuecomment-1459038566
+# TODO: switch images to Alpine once .NET 8.0 is released.
+# Currently, the correct preview version is only available on Debian.
+# https://github.com/dotnet/dotnet-docker/blob/main/samples/selecting-tags.md
+FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/sdk:8.0-preview AS build
+
+# Expose the target architecture set by the `docker build --platform` option, so that
+# we can build the assembly for the correct platform.
+ARG TARGETARCH
 
 WORKDIR /build
 
-COPY favicon.ico ./
-COPY NuGet.config ./
-COPY Directory.Build.props ./
-COPY DiscordChatExporter.Core ./DiscordChatExporter.Core
-COPY DiscordChatExporter.Cli ./DiscordChatExporter.Cli
+COPY favicon.ico .
+COPY NuGet.config .
+COPY Directory.Build.props .
+COPY DiscordChatExporter.Core DiscordChatExporter.Core
+COPY DiscordChatExporter.Cli DiscordChatExporter.Cli
 
+# Publish a self-contained assembly so we can use a slimmer runtime image
 RUN dotnet publish DiscordChatExporter.Cli \
+    --configuration Release \
+    -p:CSharpier_Bypass=true \
     --self-contained \
     --use-current-runtime \
-    --configuration Release \
-    --output ./publish
+    --arch $TARGETARCH \
+    --output publish/
 
 # -- Run
-FROM mcr.microsoft.com/dotnet/runtime-deps:7.0-alpine
+# Use `runtime-deps` instead of `runtime` because we have a self-contained assembly
+FROM --platform=$TARGETPLATFORM mcr.microsoft.com/dotnet/runtime-deps:7.0 AS run
 
-# Alpine dotnet image doesn't include timezone data, which is needed
-# for certain date/time operations.
-RUN apk add --no-cache tzdata
-
-# Create a non-root user to run the app, so that the output files
-# can be accessed by the host.
+# Create a non-root user to run the app, so that the output files can be accessed by the host
 # https://github.com/Tyrrrz/DiscordChatExporter/issues/851
-RUN adduser \
-    --disabled-password \
-    --no-create-home \
-    dce
-
+RUN adduser --disabled-password --no-create-home dce
 USER dce
 
-COPY --from=build /build/publish /opt/dce
-
-# Need to keep this as /out for backwards compatibility with documentation.
-# A lot of people have this directory mounted in their scripts files, so
-# changing it would break existing workflows.
+# This directory is exposed to the user for mounting purposes, so it's important that it always
+# stays the same for backwards compatibility.
 WORKDIR /out
 
-# Add the app directory to PATH so that it's easier to debug using a shell
-ENV PATH="$PATH:/opt/dce"
-ENTRYPOINT ["DiscordChatExporter.Cli"]
+COPY --from=build /build/publish /opt/dce
+ENTRYPOINT ["/opt/dce/DiscordChatExporter.Cli"]

DiscordChatExporter.Cli/Commands/Base/DiscordCommandBase.cs

@@ -24,10 +24,28 @@ public abstract class DiscordCommandBase : ICommand
         EnvironmentVariable = "DISCORD_TOKEN_BOT",
         Description = "This option doesn't do anything. Kept for backwards compatibility."
     )]
-    public bool IsBotToken { get; init; }
+    public bool IsBotToken { get; init; } = false;
 
     private DiscordClient? _discordClient;
     protected DiscordClient Discord => _discordClient ??= new DiscordClient(Token);
 
-    public abstract ValueTask ExecuteAsync(IConsole console);
-}
+    public virtual ValueTask ExecuteAsync(IConsole console)
+    {
+#pragma warning disable CS0618
+        // Warn if the bot option is used
+        if (IsBotToken)
+        {
+            using (console.WithForegroundColor(ConsoleColor.DarkYellow))
+            {
+                console.Error.WriteLine(
+                    "Warning: Option --bot is deprecated and should not be used. "
+                        + "The type of the provided token is now inferred automatically. "
+                        + "Please update your workflows as this option may be completely removed in a future version."
+                );
+            }
+        }
+#pragma warning restore CS0618
+
+        return default;
+    }
+}

DiscordChatExporter.Cli/Commands/Base/ExportCommandBase.cs

@@ -1,12 +1,14 @@
 using System;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
+using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Threading.Tasks;
 using CliFx.Attributes;
 using CliFx.Exceptions;
 using CliFx.Infrastructure;
+using DiscordChatExporter.Cli.Commands.Converters;
 using DiscordChatExporter.Cli.Utils.Extensions;
 using DiscordChatExporter.Core.Discord;
 using DiscordChatExporter.Core.Discord.Data;
@@ -17,6 +19,7 @@ using DiscordChatExporter.Core.Exporting.Partitioning;
 using DiscordChatExporter.Core.Utils;
 using DiscordChatExporter.Core.Utils.Extensions;
 using Gress;
+using Spectre.Console;
 
 namespace DiscordChatExporter.Cli.Commands.Base;
 
@@ -27,11 +30,10 @@ public abstract class ExportCommandBase : DiscordCommandBase
     [CommandOption(
         "output",
         'o',
-        Description =
-            "Output file or directory path. " +
-            "If a directory is specified, file names will be generated automatically based on the channel names and other parameters. " +
-            "Directory path should end with a slash to avoid ambiguity. " +
-            "Supports template tokens, see the documentation for more info."
+        Description = "Output file or directory path. "
+            + "Directory path must end with a slash to avoid ambiguity. "
+            + "If a directory is specified, file names will be generated automatically. "
+            + "Supports template tokens, see the documentation for more info."
     )]
     public string OutputPath
     {
@@ -41,11 +43,7 @@ public abstract class ExportCommandBase : DiscordCommandBase
         init => _outputPath = Path.GetFullPath(value);
     }
 
-    [CommandOption(
-        "format",
-        'f',
-        Description = "Export format."
-    )]
+    [CommandOption("format", 'f', Description = "Export format.")]
     public ExportFormat ExportFormat { get; init; } = ExportFormat.HtmlDark;
 
     [CommandOption(
@@ -63,14 +61,15 @@ public abstract class ExportCommandBase : DiscordCommandBase
     [CommandOption(
         "partition",
         'p',
-        Description =
-            "Split output into partitions, each limited to this number of messages (e.g. '100') or file size (e.g. '10mb')."
+        Description = "Split the output into partitions, each limited to the specified "
+            + "number of messages (e.g. '100') or file size (e.g. '10mb')."
     )]
     public PartitionLimit PartitionLimit { get; init; } = PartitionLimit.Null;
 
     [CommandOption(
         "filter",
-        Description = "Only include messages that satisfy this filter (e.g. 'from:foo#1234' or 'has:image')."
+        Description = "Only include messages that satisfy this filter. "
+            + "See the documentation for more info."
     )]
     public MessageFilter MessageFilter { get; init; } = MessageFilter.Null;
 
@@ -96,13 +95,14 @@ public abstract class ExportCommandBase : DiscordCommandBase
         "reuse-media",
         Description = "Reuse previously downloaded assets to avoid redundant requests."
     )]
-    public bool ShouldReuseAssets { get; init; }
+    public bool ShouldReuseAssets { get; init; } = false;
 
     private readonly string? _assetsDirPath;
 
     [CommandOption(
         "media-dir",
-        Description = "Download assets to this directory. If not specified, the asset directory path will be derived from the output path."
+        Description = "Download assets to this directory. "
+            + "If not specified, the asset directory path will be derived from the output path."
     )]
     public string? AssetsDirPath
     {
@@ -112,156 +112,172 @@ public abstract class ExportCommandBase : DiscordCommandBase
         init => _assetsDirPath = value is not null ? Path.GetFullPath(value) : null;
     }
 
+    [Obsolete("This option doesn't do anything. Kept for backwards compatibility.")]
     [CommandOption(
         "dateformat",
-        Description = "Format used when writing dates."
+        Description = "This option doesn't do anything. Kept for backwards compatibility."
     )]
     public string DateFormat { get; init; } = "MM/dd/yyyy h:mm tt";
 
+    [CommandOption("locale", Description = "Locale to use when formatting dates and numbers.")]
+    public string Locale { get; init; } = CultureInfo.CurrentCulture.Name;
+
+    [CommandOption("utc", Description = "Normalize all timestamps to UTC+0.")]
+    public bool IsUtcNormalizationEnabled { get; init; } = false;
+
     [CommandOption(
         "fuck-russia",
-        Description = "Don't print the Support Ukraine message to the console."
+        EnvironmentVariable = "FUCK_RUSSIA",
+        Description = "Don't print the Support Ukraine message to the console.",
+        // Use a converter to accept '1' as 'true' to reuse the existing environment variable
+        Converter = typeof(TruthyBooleanBindingConverter)
     )]
-    public bool IsUkraineSupportMessageDisabled { get; init; }
+    public bool IsUkraineSupportMessageDisabled { get; init; } = false;
 
     private ChannelExporter? _channelExporter;
     protected ChannelExporter Exporter => _channelExporter ??= new ChannelExporter(Discord);
 
-    protected async ValueTask ExecuteAsync(IConsole console, IReadOnlyList<Channel> channels)
+    protected async ValueTask ExportAsync(IConsole console, IReadOnlyList<Channel> channels)
     {
-        // Reuse assets option should only be used when the download assets option is set.
+        // Asset reuse can only be enabled if the download assets option is set
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/425
         if (ShouldReuseAssets && !ShouldDownloadAssets)
         {
-            throw new CommandException(
-                "Option --reuse-media cannot be used without --media."
-            );
+            throw new CommandException("Option --reuse-media cannot be used without --media.");
         }
 
-        // Assets directory should only be specified when the download assets option is set
+        // Assets directory can only be specified if the download assets option is set
         if (!string.IsNullOrWhiteSpace(AssetsDirPath) && !ShouldDownloadAssets)
         {
-            throw new CommandException(
-                "Option --media-dir cannot be used without --media."
-            );
+            throw new CommandException("Option --media-dir cannot be used without --media.");
         }
 
-        // Make sure the user does not try to export all channels into a single file.
-        // Output path must either be a directory, or contain template tokens.
+        // Make sure the user does not try to export multiple channels into one file.
+        // Output path must either be a directory or contain template tokens for this to work.
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/799
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/917
         var isValidOutputPath =
             // Anything is valid when exporting a single channel
-            channels.Count <= 1 ||
+            channels.Count <= 1
             // When using template tokens, assume the user knows what they're doing
-            OutputPath.Contains('%') ||
+            || OutputPath.Contains('%')
             // Otherwise, require an existing directory or an unambiguous directory path
-            Directory.Exists(OutputPath) || PathEx.IsDirectoryPath(OutputPath);
+            || Directory.Exists(OutputPath)
+            || PathEx.IsDirectoryPath(OutputPath);
 
         if (!isValidOutputPath)
         {
             throw new CommandException(
-                "Attempted to export multiple channels, but the output path is neither a directory nor a template. " +
-                "If the provided output path is meant to be treated as a directory, make sure it ends with a slash."
+                "Attempted to export multiple channels, but the output path is neither a directory nor a template. "
+                    + "If the provided output path is meant to be treated as a directory, make sure it ends with a slash."
             );
         }
 
-        var cancellationToken = console.RegisterCancellationHandler();
-        var errors = new ConcurrentDictionary<Channel, string>();
-
         // Export
+        var cancellationToken = console.RegisterCancellationHandler();
+        var errorsByChannel = new ConcurrentDictionary<Channel, string>();
+
         await console.Output.WriteLineAsync($"Exporting {channels.Count} channel(s)...");
-        await console.CreateProgressTicker().StartAsync(async progressContext =>
-        {
-            await Parallel.ForEachAsync(
-                channels,
-                new ParallelOptions
-                {
-                    MaxDegreeOfParallelism = Math.Max(1, ParallelLimit),
-                    CancellationToken = cancellationToken
-                },
-                async (channel, innerCancellationToken) =>
-                {
-                    try
+        await console
+            .CreateProgressTicker()
+            .HideCompleted(
+                // When exporting multiple channels in parallel, hide the completed tasks
+                // because it gets hard to visually parse them as they complete out of order.
+                // https://github.com/Tyrrrz/DiscordChatExporter/issues/1124
+                ParallelLimit > 1
+            )
+            .StartAsync(async progressContext =>
+            {
+                await Parallel.ForEachAsync(
+                    channels,
+                    new ParallelOptions
                     {
-                        await progressContext.StartTaskAsync(
-                            $"{channel.Category.Name} / {channel.Name}",
-                            async progress =>
-                            {
-                                var guild = await Discord.GetGuildAsync(channel.GuildId, innerCancellationToken);
-
-                                var request = new ExportRequest(
-                                    guild,
-                                    channel,
-                                    OutputPath,
-                                    AssetsDirPath,
-                                    ExportFormat,
-                                    After,
-                                    Before,
-                                    PartitionLimit,
-                                    MessageFilter,
-                                    ShouldFormatMarkdown,
-                                    ShouldDownloadAssets,
-                                    ShouldReuseAssets,
-                                    DateFormat
-                                );
-
-                                await Exporter.ExportChannelAsync(
-                                    request,
-                                    progress.ToPercentageBased(),
-                                    innerCancellationToken
-                                );
-                            }
-                        );
-                    }
-                    catch (DiscordChatExporterException ex) when (!ex.IsFatal)
+                        MaxDegreeOfParallelism = Math.Max(1, ParallelLimit),
+                        CancellationToken = cancellationToken
+                    },
+                    async (channel, innerCancellationToken) =>
                     {
-                        errors[channel] = ex.Message;
-                    }
-                }
-            );
-        });
+                        try
+                        {
+                            await progressContext.StartTaskAsync(
+                                channel.GetHierarchicalName(),
+                                async progress =>
+                                {
+                                    var guild = await Discord.GetGuildAsync(
+                                        channel.GuildId,
+                                        innerCancellationToken
+                                    );
 
-        // Print result
+                                    var request = new ExportRequest(
+                                        guild,
+                                        channel,
+                                        OutputPath,
+                                        AssetsDirPath,
+                                        ExportFormat,
+                                        After,
+                                        Before,
+                                        PartitionLimit,
+                                        MessageFilter,
+                                        ShouldFormatMarkdown,
+                                        ShouldDownloadAssets,
+                                        ShouldReuseAssets,
+                                        Locale,
+                                        IsUtcNormalizationEnabled
+                                    );
+
+                                    await Exporter.ExportChannelAsync(
+                                        request,
+                                        progress.ToPercentageBased(),
+                                        innerCancellationToken
+                                    );
+                                }
+                            );
+                        }
+                        catch (DiscordChatExporterException ex) when (!ex.IsFatal)
+                        {
+                            errorsByChannel[channel] = ex.Message;
+                        }
+                    }
+                );
+            });
+
+        // Print the result
         using (console.WithForegroundColor(ConsoleColor.White))
         {
             await console.Output.WriteLineAsync(
-                $"Successfully exported {channels.Count - errors.Count} channel(s)."
+                $"Successfully exported {channels.Count - errorsByChannel.Count} channel(s)."
             );
         }
 
         // Print errors
-        if (errors.Any())
+        if (errorsByChannel.Any())
         {
             await console.Output.WriteLineAsync();
 
             using (console.WithForegroundColor(ConsoleColor.Red))
             {
-                await console.Output.WriteLineAsync(
-                    $"Failed to export {errors.Count} channel(s):"
+                await console.Error.WriteLineAsync(
+                    $"Failed to export {errorsByChannel.Count} channel(s):"
                 );
             }
 
-            foreach (var (channel, error) in errors)
+            foreach (var (channel, error) in errorsByChannel)
             {
-                await console.Output.WriteAsync($"{channel.Category.Name} / {channel.Name}: ");
-
+                await console.Error.WriteAsync($"{channel.GetHierarchicalName()}: ");
                 using (console.WithForegroundColor(ConsoleColor.Red))
-                    await console.Output.WriteLineAsync(error);
+                    await console.Error.WriteLineAsync(error);
             }
 
-            await console.Output.WriteLineAsync();
+            await console.Error.WriteLineAsync();
         }
 
         // Fail the command only if ALL channels failed to export.
-        // Having some of the channels fail to export is expected.
-        if (errors.Count >= channels.Count)
-        {
+        // If only some channels failed to export, it's okay.
+        if (errorsByChannel.Count >= channels.Count)
             throw new CommandException("Export failed.");
-        }
     }
 
-    protected async ValueTask ExecuteAsync(IConsole console, IReadOnlyList<Snowflake> channelIds)
+    protected async ValueTask ExportAsync(IConsole console, IReadOnlyList<Snowflake> channelIds)
     {
         var cancellationToken = console.RegisterCancellationHandler();
 
@@ -275,15 +291,15 @@ public abstract class ExportCommandBase : DiscordCommandBase
             var channel = await Discord.GetChannelAsync(channelId, cancellationToken);
 
             // Unwrap categories
-            if (channel.Kind == ChannelKind.GuildCategory)
+            if (channel.IsCategory)
             {
                 var guildChannels =
-                    channelsByGuild.GetValueOrDefault(channel.GuildId) ??
-                    await Discord.GetGuildChannelsAsync(channel.GuildId, cancellationToken);
+                    channelsByGuild.GetValueOrDefault(channel.GuildId)
+                    ?? await Discord.GetGuildChannelsAsync(channel.GuildId, cancellationToken);
 
                 foreach (var guildChannel in guildChannels)
                 {
-                    if (guildChannel.Category.Id == channel.Id)
+                    if (guildChannel.Parent?.Id == channel.Id)
                         channels.Add(guildChannel);
                 }
 
@@ -296,26 +312,44 @@ public abstract class ExportCommandBase : DiscordCommandBase
             }
         }
 
-        await ExecuteAsync(console, channels);
+        await ExportAsync(console, channels);
     }
 
-    public override ValueTask ExecuteAsync(IConsole console)
+    public override async ValueTask ExecuteAsync(IConsole console)
     {
         // Support Ukraine callout
         if (!IsUkraineSupportMessageDisabled)
         {
-            console.Output.WriteLine("┌────────────────────────────────────────────────────────────────────┐");
-            console.Output.WriteLine("│   Thank you for supporting Ukraine <3                              │");
-            console.Output.WriteLine("│                                                                    │");
-            console.Output.WriteLine("│   As Russia wages a genocidal war against my country,              │");
-            console.Output.WriteLine("│   I'm grateful to everyone who continues to                        │");
-            console.Output.WriteLine("│   stand with Ukraine in our fight for freedom.                     │");
-            console.Output.WriteLine("│                                                                    │");
-            console.Output.WriteLine("│   Learn more: https://tyrrrz.me/ukraine                            │");
-            console.Output.WriteLine("└────────────────────────────────────────────────────────────────────┘");
+            console.Output.WriteLine(
+                "┌────────────────────────────────────────────────────────────────────┐"
+            );
+            console.Output.WriteLine(
+                "│   Thank you for supporting Ukraine <3                              │"
+            );
+            console.Output.WriteLine(
+                "│                                                                    │"
+            );
+            console.Output.WriteLine(
+                "│   As Russia wages a genocidal war against my country,              │"
+            );
+            console.Output.WriteLine(
+                "│   I'm grateful to everyone who continues to                        │"
+            );
+            console.Output.WriteLine(
+                "│   stand with Ukraine in our fight for freedom.                     │"
+            );
+            console.Output.WriteLine(
+                "│                                                                    │"
+            );
+            console.Output.WriteLine(
+                "│   Learn more: https://tyrrrz.me/ukraine                            │"
+            );
+            console.Output.WriteLine(
+                "└────────────────────────────────────────────────────────────────────┘"
+            );
             console.Output.WriteLine("");
         }
 
-        return default;
+        await base.ExecuteAsync(console);
     }
-}
+}

DiscordChatExporter.Cli/Commands/Converters/ThreadInclusionModeBindingConverter.cs

@@ -0,0 +1,22 @@
+using System;
+using CliFx.Extensibility;
+using DiscordChatExporter.Cli.Commands.Shared;
+
+namespace DiscordChatExporter.Cli.Commands.Converters;
+
+internal class ThreadInclusionModeBindingConverter : BindingConverter<ThreadInclusionMode>
+{
+    public override ThreadInclusionMode Convert(string? rawValue)
+    {
+        // Empty or unset value is treated as 'active' to match the previous behavior
+        if (string.IsNullOrWhiteSpace(rawValue))
+            return ThreadInclusionMode.Active;
+
+        // Boolean 'true' is treated as 'active', boolean 'false' is treated as 'none'
+        if (bool.TryParse(rawValue, out var boolValue))
+            return boolValue ? ThreadInclusionMode.Active : ThreadInclusionMode.None;
+
+        // Otherwise, fall back to regular enum parsing
+        return Enum.Parse<ThreadInclusionMode>(rawValue, true);
+    }
+}

DiscordChatExporter.Cli/Commands/Converters/TruthyBooleanBindingConverter.cs

@@ -0,0 +1,21 @@
+using System.Globalization;
+using CliFx.Extensibility;
+
+namespace DiscordChatExporter.Cli.Commands.Converters;
+
+internal class TruthyBooleanBindingConverter : BindingConverter<bool>
+{
+    public override bool Convert(string? rawValue)
+    {
+        // Empty or unset value is treated as 'true', to match the regular boolean behavior
+        if (string.IsNullOrWhiteSpace(rawValue))
+            return true;
+
+        // Number '1' is treated as 'true', other numbers are treated as 'false'
+        if (int.TryParse(rawValue, CultureInfo.InvariantCulture, out var intValue))
+            return intValue == 1;
+
+        // Otherwise, fall back to regular boolean parsing
+        return bool.Parse(rawValue);
+    }
+}

DiscordChatExporter.Cli/Commands/ExportAllCommand.cs

@@ -6,6 +6,8 @@ using CliFx.Attributes;
 using CliFx.Exceptions;
 using CliFx.Infrastructure;
 using DiscordChatExporter.Cli.Commands.Base;
+using DiscordChatExporter.Cli.Commands.Converters;
+using DiscordChatExporter.Cli.Commands.Shared;
 using DiscordChatExporter.Core.Discord;
 using DiscordChatExporter.Core.Discord.Data;
 using DiscordChatExporter.Core.Exceptions;
@@ -13,24 +15,29 @@ using JsonExtensions.Reading;
 
 namespace DiscordChatExporter.Cli.Commands;
 
-[Command("exportall", Description = "Export all accessible channels.")]
+[Command("exportall", Description = "Exports all accessible channels.")]
 public class ExportAllCommand : ExportCommandBase
 {
-    [CommandOption(
-        "include-dm",
-        Description = "Include direct message channels."
-    )]
+    [CommandOption("include-dm", Description = "Include direct message channels.")]
     public bool IncludeDirectChannels { get; init; } = true;
 
-    [CommandOption(
-        "include-guilds",
-        Description = "Include guild channels."
-    )]
+    [CommandOption("include-guilds", Description = "Include guild channels.")]
     public bool IncludeGuildChannels { get; init; } = true;
 
+    [CommandOption("include-vc", Description = "Include voice channels.")]
+    public bool IncludeVoiceChannels { get; init; } = true;
+
+    [CommandOption(
+        "include-threads",
+        Description = "Which types of threads should be included.",
+        Converter = typeof(ThreadInclusionModeBindingConverter)
+    )]
+    public ThreadInclusionMode ThreadInclusionMode { get; init; } = ThreadInclusionMode.None;
+
     [CommandOption(
         "data-package",
-        Description = "Path to the personal data package (ZIP file) requested from Discord. If provided, only channels referenced in the dump will be exported."
+        Description = "Path to the personal data package (ZIP file) requested from Discord. "
+            + "If provided, only channels referenced in the dump will be exported."
     )]
     public string? DataPackageFilePath { get; init; }
 
@@ -48,10 +55,36 @@ public class ExportAllCommand : ExportCommandBase
 
             await foreach (var guild in Discord.GetUserGuildsAsync(cancellationToken))
             {
-                await foreach (var channel in Discord.GetGuildChannelsAsync(guild.Id, cancellationToken))
+                // Regular channels
+                await foreach (
+                    var channel in Discord.GetGuildChannelsAsync(guild.Id, cancellationToken)
+                )
                 {
+                    if (channel.IsCategory)
+                        continue;
+
+                    if (!IncludeVoiceChannels && channel.IsVoice)
+                        continue;
+
                     channels.Add(channel);
                 }
+
+                // Threads
+                if (ThreadInclusionMode != ThreadInclusionMode.None)
+                {
+                    await foreach (
+                        var thread in Discord.GetGuildThreadsAsync(
+                            guild.Id,
+                            ThreadInclusionMode == ThreadInclusionMode.All,
+                            Before,
+                            After,
+                            cancellationToken
+                        )
+                    )
+                    {
+                        channels.Add(thread);
+                    }
+                }
             }
         }
         // Pull from the data package
@@ -62,7 +95,7 @@ public class ExportAllCommand : ExportCommandBase
 
             var entry = archive.GetEntry("messages/index.json");
             if (entry is null)
-                throw new CommandException("Cannot find channel index inside the data package.");
+                throw new CommandException("Could not find channel index inside the data package.");
 
             await using var stream = entry.Open();
             using var document = await JsonDocument.ParseAsync(stream, default, cancellationToken);
@@ -76,7 +109,9 @@ public class ExportAllCommand : ExportCommandBase
                 if (channelName is null)
                     continue;
 
-                await console.Output.WriteLineAsync($"Fetching channel '{channelName}' ({channelId})...");
+                await console.Output.WriteLineAsync(
+                    $"Fetching channel '{channelName}' ({channelId})..."
+                );
 
                 try
                 {
@@ -85,17 +120,25 @@ public class ExportAllCommand : ExportCommandBase
                 }
                 catch (DiscordChatExporterException)
                 {
-                    await console.Output.WriteLineAsync($"Channel '{channelName}' ({channelId}) is inaccessible.");
+                    await console.Error.WriteLineAsync(
+                        $"Channel '{channelName}' ({channelId}) is inaccessible."
+                    );
                 }
             }
         }
 
         // Filter out unwanted channels
         if (!IncludeDirectChannels)
-            channels.RemoveAll(c => c.Kind.IsDirect());
+            channels.RemoveAll(c => c.IsDirect);
         if (!IncludeGuildChannels)
-            channels.RemoveAll(c => c.Kind.IsGuild());
+            channels.RemoveAll(c => c.IsGuild);
+        if (!IncludeVoiceChannels)
+            channels.RemoveAll(c => c.IsVoice);
+        if (ThreadInclusionMode == ThreadInclusionMode.None)
+            channels.RemoveAll(c => c.IsThread);
+        if (ThreadInclusionMode != ThreadInclusionMode.All)
+            channels.RemoveAll(c => c is { IsThread: true, IsArchived: true });
 
-        await base.ExecuteAsync(console, channels);
+        await ExportAsync(console, channels);
     }
-}
+}

DiscordChatExporter.Cli/Commands/ExportChannelsCommand.cs

@@ -7,20 +7,21 @@ using DiscordChatExporter.Core.Discord;
 
 namespace DiscordChatExporter.Cli.Commands;
 
-[Command("export", Description = "Export one or multiple channels.")]
+[Command("export", Description = "Exports one or multiple channels.")]
 public class ExportChannelsCommand : ExportCommandBase
 {
     // TODO: change this to plural (breaking change)
     [CommandOption(
         "channel",
         'c',
-        Description = "Channel ID(s). If provided with category IDs, all channels inside those categories will be exported."
+        Description = "Channel ID(s). "
+            + "If provided with category ID(s), all channels inside those categories will be exported."
     )]
     public required IReadOnlyList<Snowflake> ChannelIds { get; init; }
 
     public override async ValueTask ExecuteAsync(IConsole console)
     {
         await base.ExecuteAsync(console);
-        await base.ExecuteAsync(console, ChannelIds);
+        await ExportAsync(console, ChannelIds);
     }
-}
+}

DiscordChatExporter.Cli/Commands/ExportDirectMessagesCommand.cs

@@ -7,7 +7,7 @@ using DiscordChatExporter.Core.Utils.Extensions;
 
 namespace DiscordChatExporter.Cli.Commands;
 
-[Command("exportdm", Description = "Export all direct message channels.")]
+[Command("exportdm", Description = "Exports all direct message channels.")]
 public class ExportDirectMessagesCommand : ExportCommandBase
 {
     public override async ValueTask ExecuteAsync(IConsole console)
@@ -17,8 +17,11 @@ public class ExportDirectMessagesCommand : ExportCommandBase
         var cancellationToken = console.RegisterCancellationHandler();
 
         await console.Output.WriteLineAsync("Fetching channels...");
-        var channels = await Discord.GetGuildChannelsAsync(Guild.DirectMessages.Id, cancellationToken);
+        var channels = await Discord.GetGuildChannelsAsync(
+            Guild.DirectMessages.Id,
+            cancellationToken
+        );
 
-        await base.ExecuteAsync(console, channels);
+        await ExportAsync(console, channels);
     }
-}
+}

DiscordChatExporter.Cli/Commands/ExportGuildCommand.cs

@@ -1,36 +1,69 @@
-using System.Linq;
+using System.Collections.Generic;
 using System.Threading.Tasks;
 using CliFx.Attributes;
 using CliFx.Infrastructure;
 using DiscordChatExporter.Cli.Commands.Base;
+using DiscordChatExporter.Cli.Commands.Converters;
+using DiscordChatExporter.Cli.Commands.Shared;
 using DiscordChatExporter.Core.Discord;
 using DiscordChatExporter.Core.Discord.Data;
-using DiscordChatExporter.Core.Utils.Extensions;
 
 namespace DiscordChatExporter.Cli.Commands;
 
-[Command("exportguild", Description = "Export all channels within specified guild.")]
+[Command("exportguild", Description = "Exports all channels within the specified guild.")]
 public class ExportGuildCommand : ExportCommandBase
 {
-    [CommandOption(
-        "guild",
-        'g',
-        Description = "Guild ID."
-    )]
+    [CommandOption("guild", 'g', Description = "Guild ID.")]
     public required Snowflake GuildId { get; init; }
 
+    [CommandOption("include-vc", Description = "Include voice channels.")]
+    public bool IncludeVoiceChannels { get; init; } = true;
+
+    [CommandOption(
+        "include-threads",
+        Description = "Which types of threads should be included.",
+        Converter = typeof(ThreadInclusionModeBindingConverter)
+    )]
+    public ThreadInclusionMode ThreadInclusionMode { get; init; } = ThreadInclusionMode.None;
+
     public override async ValueTask ExecuteAsync(IConsole console)
     {
         await base.ExecuteAsync(console);
 
         var cancellationToken = console.RegisterCancellationHandler();
+        var channels = new List<Channel>();
 
         await console.Output.WriteLineAsync("Fetching channels...");
 
-        var channels = (await Discord.GetGuildChannelsAsync(GuildId, cancellationToken))
-            .Where(c => c.Kind != ChannelKind.GuildCategory)
-            .ToArray();
+        // Regular channels
+        await foreach (var channel in Discord.GetGuildChannelsAsync(GuildId, cancellationToken))
+        {
+            if (channel.IsCategory)
+                continue;
 
-        await base.ExecuteAsync(console, channels);
+            if (!IncludeVoiceChannels && channel.IsVoice)
+                continue;
+
+            channels.Add(channel);
+        }
+
+        // Threads
+        if (ThreadInclusionMode != ThreadInclusionMode.None)
+        {
+            await foreach (
+                var thread in Discord.GetGuildThreadsAsync(
+                    GuildId,
+                    ThreadInclusionMode == ThreadInclusionMode.All,
+                    Before,
+                    After,
+                    cancellationToken
+                )
+            )
+            {
+                channels.Add(thread);
+            }
+        }
+
+        await ExportAsync(console, channels);
     }
-}
+}

DiscordChatExporter.Cli/Commands/GetChannelsCommand.cs

@@ -4,6 +4,8 @@ using System.Threading.Tasks;
 using CliFx.Attributes;
 using CliFx.Infrastructure;
 using DiscordChatExporter.Cli.Commands.Base;
+using DiscordChatExporter.Cli.Commands.Converters;
+using DiscordChatExporter.Cli.Commands.Shared;
 using DiscordChatExporter.Core.Discord;
 using DiscordChatExporter.Core.Discord.Data;
 using DiscordChatExporter.Core.Utils.Extensions;
@@ -13,37 +15,101 @@ namespace DiscordChatExporter.Cli.Commands;
 [Command("channels", Description = "Get the list of channels in a guild.")]
 public class GetChannelsCommand : DiscordCommandBase
 {
-    [CommandOption(
-        "guild",
-        'g',
-        Description = "Guild ID."
-    )]
+    [CommandOption("guild", 'g', Description = "Guild ID.")]
     public required Snowflake GuildId { get; init; }
 
+    [CommandOption("include-vc", Description = "Include voice channels.")]
+    public bool IncludeVoiceChannels { get; init; } = true;
+
+    [CommandOption(
+        "include-threads",
+        Description = "Which types of threads should be included.",
+        Converter = typeof(ThreadInclusionModeBindingConverter)
+    )]
+    public ThreadInclusionMode ThreadInclusionMode { get; init; } = ThreadInclusionMode.None;
+
     public override async ValueTask ExecuteAsync(IConsole console)
     {
+        await base.ExecuteAsync(console);
+
         var cancellationToken = console.RegisterCancellationHandler();
 
         var channels = (await Discord.GetGuildChannelsAsync(GuildId, cancellationToken))
-            .Where(c => c.Kind != ChannelKind.GuildCategory)
-            .OrderBy(c => c.Category.Position)
+            .Where(c => !c.IsCategory)
+            .Where(c => IncludeVoiceChannels || !c.IsVoice)
+            .OrderBy(c => c.Parent?.Position)
             .ThenBy(c => c.Name)
             .ToArray();
 
+        var channelIdMaxLength = channels
+            .Select(c => c.Id.ToString().Length)
+            .OrderDescending()
+            .FirstOrDefault();
+
+        var threads =
+            ThreadInclusionMode != ThreadInclusionMode.None
+                ? (
+                    await Discord.GetGuildThreadsAsync(
+                        GuildId,
+                        ThreadInclusionMode == ThreadInclusionMode.All,
+                        null,
+                        null,
+                        cancellationToken
+                    )
+                )
+                    .OrderBy(c => c.Name)
+                    .ToArray()
+                : Array.Empty<Channel>();
+
         foreach (var channel in channels)
         {
             // Channel ID
             await console.Output.WriteAsync(
-                channel.Id.ToString().PadRight(18, ' ')
+                channel.Id.ToString().PadRight(channelIdMaxLength, ' ')
             );
 
             // Separator
             using (console.WithForegroundColor(ConsoleColor.DarkGray))
                 await console.Output.WriteAsync(" | ");
 
-            // Channel category / name
+            // Channel name
             using (console.WithForegroundColor(ConsoleColor.White))
-                await console.Output.WriteLineAsync($"{channel.Category.Name} / {channel.Name}");
+                await console.Output.WriteLineAsync(channel.GetHierarchicalName());
+
+            var channelThreads = threads.Where(t => t.Parent?.Id == channel.Id).ToArray();
+            var channelThreadIdMaxLength = channelThreads
+                .Select(t => t.Id.ToString().Length)
+                .OrderDescending()
+                .FirstOrDefault();
+
+            foreach (var channelThread in channelThreads)
+            {
+                // Indent
+                await console.Output.WriteAsync(" * ");
+
+                // Thread ID
+                await console.Output.WriteAsync(
+                    channelThread.Id.ToString().PadRight(channelThreadIdMaxLength, ' ')
+                );
+
+                // Separator
+                using (console.WithForegroundColor(ConsoleColor.DarkGray))
+                    await console.Output.WriteAsync(" | ");
+
+                // Thread name
+                using (console.WithForegroundColor(ConsoleColor.White))
+                    await console.Output.WriteAsync($"Thread / {channelThread.Name}");
+
+                // Separator
+                using (console.WithForegroundColor(ConsoleColor.DarkGray))
+                    await console.Output.WriteAsync(" | ");
+
+                // Thread status
+                using (console.WithForegroundColor(ConsoleColor.White))
+                    await console.Output.WriteLineAsync(
+                        channelThread.IsArchived ? "Archived" : "Active"
+                    );
+            }
         }
     }
-}
+}

DiscordChatExporter.Cli/Commands/GetDirectChannelsCommand.cs

@@ -9,33 +9,41 @@ using DiscordChatExporter.Core.Utils.Extensions;
 
 namespace DiscordChatExporter.Cli.Commands;
 
-[Command("dm", Description = "Get the list of direct message channels.")]
+[Command("dm", Description = "Gets the list of all direct message channels.")]
 public class GetDirectChannelsCommand : DiscordCommandBase
 {
     public override async ValueTask ExecuteAsync(IConsole console)
     {
+        await base.ExecuteAsync(console);
+
         var cancellationToken = console.RegisterCancellationHandler();
 
-        var channels = (await Discord.GetGuildChannelsAsync(Guild.DirectMessages.Id, cancellationToken))
-            .Where(c => c.Kind != ChannelKind.GuildCategory)
+        var channels = (
+            await Discord.GetGuildChannelsAsync(Guild.DirectMessages.Id, cancellationToken)
+        )
             .OrderByDescending(c => c.LastMessageId)
             .ThenBy(c => c.Name)
             .ToArray();
 
+        var channelIdMaxLength = channels
+            .Select(c => c.Id.ToString().Length)
+            .OrderDescending()
+            .FirstOrDefault();
+
         foreach (var channel in channels)
         {
             // Channel ID
             await console.Output.WriteAsync(
-                channel.Id.ToString().PadRight(18, ' ')
+                channel.Id.ToString().PadRight(channelIdMaxLength, ' ')
             );
 
             // Separator
             using (console.WithForegroundColor(ConsoleColor.DarkGray))
                 await console.Output.WriteAsync(" | ");
 
-            // Channel category / name
+            // Channel name
             using (console.WithForegroundColor(ConsoleColor.White))
-                await console.Output.WriteLineAsync($"{channel.Category.Name} / {channel.Name}");
+                await console.Output.WriteLineAsync(channel.GetHierarchicalName());
         }
     }
-}
+}

DiscordChatExporter.Cli/Commands/GetGuildsCommand.cs

@@ -9,24 +9,30 @@ using DiscordChatExporter.Core.Utils.Extensions;
 
 namespace DiscordChatExporter.Cli.Commands;
 
-[Command("guilds", Description = "Get the list of accessible guilds.")]
+[Command("guilds", Description = "Gets the list of accessible guilds.")]
 public class GetGuildsCommand : DiscordCommandBase
 {
     public override async ValueTask ExecuteAsync(IConsole console)
     {
+        await base.ExecuteAsync(console);
+
         var cancellationToken = console.RegisterCancellationHandler();
 
         var guilds = (await Discord.GetUserGuildsAsync(cancellationToken))
             // Show direct messages first
             .OrderByDescending(g => g.Id == Guild.DirectMessages.Id)
-            .ThenBy(g => g.Name);
+            .ThenBy(g => g.Name)
+            .ToArray();
+
+        var guildIdMaxLength = guilds
+            .Select(g => g.Id.ToString().Length)
+            .OrderDescending()
+            .FirstOrDefault();
 
         foreach (var guild in guilds)
         {
             // Guild ID
-            await console.Output.WriteAsync(
-                guild.Id.ToString().PadRight(18, ' ')
-            );
+            await console.Output.WriteAsync(guild.Id.ToString().PadRight(guildIdMaxLength, ' '));
 
             // Separator
             using (console.WithForegroundColor(ConsoleColor.DarkGray))
@@ -37,4 +43,4 @@ public class GetGuildsCommand : DiscordCommandBase
                 await console.Output.WriteLineAsync(guild.Name);
         }
     }
-}
+}

DiscordChatExporter.Cli/Commands/GuideCommand.cs

@@ -6,7 +6,7 @@ using CliFx.Infrastructure;
 
 namespace DiscordChatExporter.Cli.Commands;
 
-[Command("guide", Description = "Explains how to obtain token, guild or channel ID.")]
+[Command("guide", Description = "Explains how to obtain the token, guild or channel ID.")]
 public class GuideCommand : ICommand
 {
     public ValueTask ExecuteAsync(IConsole console)
@@ -15,14 +15,18 @@ public class GuideCommand : ICommand
         using (console.WithForegroundColor(ConsoleColor.White))
             console.Output.WriteLine("To get user token:");
 
-        console.Output.WriteLine(" *  Automating user accounts is technically against TOS — USE AT YOUR OWN RISK!");
+        console.Output.WriteLine(
+            " *  Automating user accounts is technically against TOS — USE AT YOUR OWN RISK!"
+        );
         console.Output.WriteLine(" 1. Open Discord in your web browser and login");
         console.Output.WriteLine(" 2. Open any server or direct message channel");
         console.Output.WriteLine(" 3. Press Ctrl+Shift+I to show developer tools");
         console.Output.WriteLine(" 4. Navigate to the Network tab");
         console.Output.WriteLine(" 5. Press Ctrl+R to reload");
         console.Output.WriteLine(" 6. Switch between random channels to trigger network requests");
-        console.Output.WriteLine(" 7. Search for a request containing \"messages?limit=50\" or similar");
+        console.Output.WriteLine(
+            " 7. Search for a request containing \"messages?limit=50\" or similar"
+        );
         console.Output.WriteLine(" 8. Select the Headers tab on the right");
         console.Output.WriteLine(" 9. Scroll down to the Request Headers section");
         console.Output.WriteLine(" 10. Copy the value of the \"authorization\" header");
@@ -36,38 +40,34 @@ public class GuideCommand : ICommand
         console.Output.WriteLine(" 2. Open your application's settings");
         console.Output.WriteLine(" 3. Navigate to the Bot section on the left");
         console.Output.WriteLine(" 4. Under Token click Copy");
-        console.Output.WriteLine(" *  Your bot needs to have Message Content Intent enabled to read messages");
+        console.Output.WriteLine(
+            " *  Your bot needs to have Message Content Intent enabled to read messages"
+        );
         console.Output.WriteLine();
 
         // Guild or channel ID
         using (console.WithForegroundColor(ConsoleColor.White))
-            console.Output.WriteLine("To get guild ID or guild channel ID:");
+            console.Output.WriteLine("To get guild ID or channel ID:");
 
         console.Output.WriteLine(" 1. Open Discord");
         console.Output.WriteLine(" 2. Open Settings");
         console.Output.WriteLine(" 3. Go to Advanced section");
         console.Output.WriteLine(" 4. Enable Developer Mode");
-        console.Output.WriteLine(" 5. Right click on the desired guild or channel and click Copy ID");
-        console.Output.WriteLine();
-
-        // Direct message channel ID
-        using (console.WithForegroundColor(ConsoleColor.White))
-            console.Output.WriteLine("To get direct message channel ID:");
-
-        console.Output.WriteLine(" 1. Open Discord");
-        console.Output.WriteLine(" 2. Open the desired direct message channel");
-        console.Output.WriteLine(" 3. Press Ctrl+Shift+I to show developer tools");
-        console.Output.WriteLine(" 4. Navigate to the Console tab");
-        console.Output.WriteLine(" 5. Type \"window.location.href\" and press Enter");
-        console.Output.WriteLine(" 6. Copy the first long sequence of numbers inside the URL");
+        console.Output.WriteLine(
+            " 5. Right-click on the desired guild or channel and click Copy Server ID or Copy Channel ID"
+        );
         console.Output.WriteLine();
 
         // Docs link
         using (console.WithForegroundColor(ConsoleColor.White))
-            console.Output.WriteLine("If you have questions or issues, please refer to the documentation:");
+            console.Output.WriteLine(
+                "If you have questions or issues, please refer to the documentation:"
+            );
         using (console.WithForegroundColor(ConsoleColor.DarkCyan))
-            console.Output.WriteLine("https://github.com/Tyrrrz/DiscordChatExporter/blob/master/.docs");
+            console.Output.WriteLine(
+                "https://github.com/Tyrrrz/DiscordChatExporter/blob/master/.docs"
+            );
 
         return default;
     }
-}
+}

DiscordChatExporter.Cli/Commands/Shared/ThreadInclusionMode.cs

@@ -0,0 +1,8 @@
+namespace DiscordChatExporter.Cli.Commands.Shared;
+
+public enum ThreadInclusionMode
+{
+    None,
+    Active,
+    All
+}

DiscordChatExporter.Cli/DiscordChatExporter.Cli.csproj

@@ -6,11 +6,12 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="CliFx" Version="2.3.1" />
-    <PackageReference Include="FuckRussia" Version="1.0.1" PrivateAssets="all" />
-    <PackageReference Include="Spectre.Console" Version="0.46.0" />
-    <PackageReference Include="Gress" Version="2.0.1" />
-    <PackageReference Include="DotnetRuntimeBootstrapper" Version="2.4.0" PrivateAssets="all" />
+    <PackageReference Include="CliFx" Version="2.3.4" />
+    <PackageReference Include="CSharpier.MsBuild" Version="0.25.0" PrivateAssets="all" />
+    <PackageReference Include="Deorcify" Version="1.0.2" PrivateAssets="all" />
+    <PackageReference Include="DotnetRuntimeBootstrapper" Version="2.5.1" PrivateAssets="all" />
+    <PackageReference Include="Gress" Version="2.1.1" />
+    <PackageReference Include="Spectre.Console" Version="0.47.0" />
   </ItemGroup>
 
   <ItemGroup>

DiscordChatExporter.Cli/Program.cs

@@ -1,6 +1,3 @@
 using CliFx;
 
-return await new CliApplicationBuilder()
-    .AddCommandsFromThisAssembly()
-    .Build()
-    .RunAsync(args);
+return await new CliApplicationBuilder().AddCommandsFromThisAssembly().Build().RunAsync(args);

DiscordChatExporter.Cli/Utils/Extensions/ConsoleExtensions.cs

@@ -8,34 +8,38 @@ namespace DiscordChatExporter.Cli.Utils.Extensions;
 internal static class ConsoleExtensions
 {
     public static IAnsiConsole CreateAnsiConsole(this IConsole console) =>
-        AnsiConsole.Create(new AnsiConsoleSettings
-        {
-            Ansi = AnsiSupport.Detect,
-            ColorSystem = ColorSystemSupport.Detect,
-            Out = new AnsiConsoleOutput(console.Output)
-        });
-
-    public static Progress CreateProgressTicker(this IConsole console) => console
-        .CreateAnsiConsole()
-        .Progress()
-        .AutoClear(false)
-        .AutoRefresh(true)
-        .HideCompleted(false)
-        .Columns(
-            new TaskDescriptionColumn {Alignment = Justify.Left},
-            new ProgressBarColumn(),
-            new PercentageColumn()
+        AnsiConsole.Create(
+            new AnsiConsoleSettings
+            {
+                Ansi = AnsiSupport.Detect,
+                ColorSystem = ColorSystemSupport.Detect,
+                Out = new AnsiConsoleOutput(console.Output)
+            }
         );
 
+    public static Progress CreateProgressTicker(this IConsole console) =>
+        console
+            .CreateAnsiConsole()
+            .Progress()
+            .AutoClear(false)
+            .AutoRefresh(true)
+            .HideCompleted(false)
+            .Columns(
+                new TaskDescriptionColumn { Alignment = Justify.Left },
+                new ProgressBarColumn(),
+                new PercentageColumn()
+            );
+
     public static async ValueTask StartTaskAsync(
         this ProgressContext progressContext,
         string description,
-        Func<ProgressTask, ValueTask> performOperationAsync)
+        Func<ProgressTask, ValueTask> performOperationAsync
+    )
     {
         var progressTask = progressContext.AddTask(
             // Don't recognize random square brackets as style tags
             Markup.Escape(description),
-            new ProgressTaskSettings {MaxValue = 1}
+            new ProgressTaskSettings { MaxValue = 1 }
         );
 
         try
@@ -48,4 +52,4 @@ internal static class ConsoleExtensions
             progressTask.StopTask();
         }
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/Attachment.cs

@@ -15,30 +15,31 @@ public partial record Attachment(
     string? Description,
     int? Width,
     int? Height,
-    FileSize FileSize) : IHasId
+    FileSize FileSize
+) : IHasId
 {
     public string FileExtension => Path.GetExtension(FileName);
 
     public bool IsImage =>
-        string.Equals(FileExtension, ".jpg", StringComparison.OrdinalIgnoreCase) ||
-        string.Equals(FileExtension, ".jpeg", StringComparison.OrdinalIgnoreCase) ||
-        string.Equals(FileExtension, ".png", StringComparison.OrdinalIgnoreCase) ||
-        string.Equals(FileExtension, ".gif", StringComparison.OrdinalIgnoreCase) ||
-        string.Equals(FileExtension, ".bmp", StringComparison.OrdinalIgnoreCase) ||
-        string.Equals(FileExtension, ".webp", StringComparison.OrdinalIgnoreCase);
+        string.Equals(FileExtension, ".jpg", StringComparison.OrdinalIgnoreCase)
+        || string.Equals(FileExtension, ".jpeg", StringComparison.OrdinalIgnoreCase)
+        || string.Equals(FileExtension, ".png", StringComparison.OrdinalIgnoreCase)
+        || string.Equals(FileExtension, ".gif", StringComparison.OrdinalIgnoreCase)
+        || string.Equals(FileExtension, ".bmp", StringComparison.OrdinalIgnoreCase)
+        || string.Equals(FileExtension, ".webp", StringComparison.OrdinalIgnoreCase);
 
     public bool IsVideo =>
-        string.Equals(FileExtension, ".gifv", StringComparison.OrdinalIgnoreCase) ||
-        string.Equals(FileExtension, ".mp4", StringComparison.OrdinalIgnoreCase) ||
-        string.Equals(FileExtension, ".webm", StringComparison.OrdinalIgnoreCase) ||
-        string.Equals(FileExtension, ".mov", StringComparison.OrdinalIgnoreCase);
+        string.Equals(FileExtension, ".gifv", StringComparison.OrdinalIgnoreCase)
+        || string.Equals(FileExtension, ".mp4", StringComparison.OrdinalIgnoreCase)
+        || string.Equals(FileExtension, ".webm", StringComparison.OrdinalIgnoreCase)
+        || string.Equals(FileExtension, ".mov", StringComparison.OrdinalIgnoreCase);
 
     public bool IsAudio =>
-        string.Equals(FileExtension, ".mp3", StringComparison.OrdinalIgnoreCase) ||
-        string.Equals(FileExtension, ".wav", StringComparison.OrdinalIgnoreCase) ||
-        string.Equals(FileExtension, ".ogg", StringComparison.OrdinalIgnoreCase) ||
-        string.Equals(FileExtension, ".flac", StringComparison.OrdinalIgnoreCase) ||
-        string.Equals(FileExtension, ".m4a", StringComparison.OrdinalIgnoreCase);
+        string.Equals(FileExtension, ".mp3", StringComparison.OrdinalIgnoreCase)
+        || string.Equals(FileExtension, ".wav", StringComparison.OrdinalIgnoreCase)
+        || string.Equals(FileExtension, ".ogg", StringComparison.OrdinalIgnoreCase)
+        || string.Equals(FileExtension, ".flac", StringComparison.OrdinalIgnoreCase)
+        || string.Equals(FileExtension, ".m4a", StringComparison.OrdinalIgnoreCase);
 
     public bool IsSpoiler => FileName.StartsWith("SPOILER_", StringComparison.Ordinal);
 }
@@ -57,4 +58,4 @@ public partial record Attachment
 
         return new Attachment(id, url, fileName, description, width, height, fileSize);
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/Channel.cs

@@ -1,4 +1,5 @@
-using System.Linq;
+using System.Collections.Generic;
+using System.Linq;
 using System.Text.Json;
 using DiscordChatExporter.Core.Discord.Data.Common;
 using DiscordChatExporter.Core.Utils.Extensions;
@@ -11,83 +12,104 @@ public partial record Channel(
     Snowflake Id,
     ChannelKind Kind,
     Snowflake GuildId,
-    ChannelCategory Category,
+    Channel? Parent,
     string Name,
     int? Position,
     string? IconUrl,
     string? Topic,
-    Snowflake? LastMessageId) : IHasId
+    bool IsArchived,
+    Snowflake? LastMessageId
+) : IHasId
 {
+    public bool IsDirect => Kind is ChannelKind.DirectTextChat or ChannelKind.DirectGroupTextChat;
+
+    public bool IsGuild => !IsDirect;
+
+    public bool IsCategory => Kind == ChannelKind.GuildCategory;
+
     public bool IsVoice => Kind is ChannelKind.GuildVoiceChat or ChannelKind.GuildStageVoice;
+
+    public bool IsThread =>
+        Kind
+            is ChannelKind.GuildNewsThread
+                or ChannelKind.GuildPublicThread
+                or ChannelKind.GuildPrivateThread;
+
+    public bool IsEmpty => LastMessageId is null;
+
+    public IEnumerable<Channel> GetParents()
+    {
+        var current = Parent;
+        while (current is not null)
+        {
+            yield return current;
+            current = current.Parent;
+        }
+    }
+
+    public Channel? TryGetRootParent() => GetParents().LastOrDefault();
+
+    public string GetHierarchicalName() =>
+        string.Join(" / ", GetParents().Reverse().Select(c => c.Name).Append(Name));
+
+    public bool MayHaveMessagesAfter(Snowflake messageId) => !IsEmpty && messageId < LastMessageId;
+
+    public bool MayHaveMessagesBefore(Snowflake messageId) => !IsEmpty && messageId > Id;
 }
 
 public partial record Channel
 {
-    private static ChannelCategory GetFallbackCategory(ChannelKind channelKind) => new(
-        Snowflake.Zero,
-        channelKind switch
-        {
-            ChannelKind.GuildTextChat => "Text",
-            ChannelKind.DirectTextChat => "Private",
-            ChannelKind.DirectGroupTextChat => "Group",
-            ChannelKind.GuildNews => "News",
-            _ => "Default"
-        },
-        null
-    );
-
-    public static Channel Parse(JsonElement json, ChannelCategory? categoryHint = null, int? positionHint = null)
+    public static Channel Parse(JsonElement json, Channel? parent = null, int? positionHint = null)
     {
         var id = json.GetProperty("id").GetNonWhiteSpaceString().Pipe(Snowflake.Parse);
         var kind = (ChannelKind)json.GetProperty("type").GetInt32();
 
         var guildId =
-            json.GetPropertyOrNull("guild_id")?.GetNonWhiteSpaceStringOrNull()?.Pipe(Snowflake.Parse) ??
-            Guild.DirectMessages.Id;
-
-        var category = categoryHint ?? GetFallbackCategory(kind);
+            json.GetPropertyOrNull("guild_id")
+                ?.GetNonWhiteSpaceStringOrNull()
+                ?.Pipe(Snowflake.Parse) ?? Guild.DirectMessages.Id;
 
         var name =
             // Guild channel
-            json.GetPropertyOrNull("name")?.GetNonWhiteSpaceStringOrNull() ??
-
+            json.GetPropertyOrNull("name")?.GetNonWhiteSpaceStringOrNull()
             // DM channel
-            json.GetPropertyOrNull("recipients")?
-                .EnumerateArrayOrNull()?
-                .Select(User.Parse)
-                .Select(u => u.Name)
-                .Pipe(s => string.Join(", ", s)) ??
-
+            ?? json.GetPropertyOrNull("recipients")
+                ?.EnumerateArrayOrNull()
+                ?.Select(User.Parse)
+                .Select(u => u.DisplayName)
+                .Pipe(s => string.Join(", ", s))
             // Fallback
-            id.ToString();
+            ?? id.ToString();
 
-        var position =
-            positionHint ??
-            json.GetPropertyOrNull("position")?.GetInt32OrNull();
+        var position = positionHint ?? json.GetPropertyOrNull("position")?.GetInt32OrNull();
 
         // Icons can only be set for group DM channels
-        var iconUrl = json
-            .GetPropertyOrNull("icon")?
-            .GetNonWhiteSpaceStringOrNull()?
-            .Pipe(h => ImageCdn.GetChannelIconUrl(id, h));
+        var iconUrl = json.GetPropertyOrNull("icon")
+            ?.GetNonWhiteSpaceStringOrNull()
+            ?.Pipe(h => ImageCdn.GetChannelIconUrl(id, h));
 
         var topic = json.GetPropertyOrNull("topic")?.GetStringOrNull();
 
-        var lastMessageId = json
-            .GetPropertyOrNull("last_message_id")?
-            .GetNonWhiteSpaceStringOrNull()?
-            .Pipe(Snowflake.Parse);
+        var isArchived =
+            json.GetPropertyOrNull("thread_metadata")
+                ?.GetPropertyOrNull("archived")
+                ?.GetBooleanOrNull() ?? false;
+
+        var lastMessageId = json.GetPropertyOrNull("last_message_id")
+            ?.GetNonWhiteSpaceStringOrNull()
+            ?.Pipe(Snowflake.Parse);
 
         return new Channel(
             id,
             kind,
             guildId,
-            category,
+            parent,
             name,
             position,
             iconUrl,
             topic,
+            isArchived,
             lastMessageId
         );
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/ChannelCategory.cs

@@ -1,24 +0,0 @@
-using System.Text.Json;
-using DiscordChatExporter.Core.Discord.Data.Common;
-using DiscordChatExporter.Core.Utils.Extensions;
-using JsonExtensions.Reading;
-
-namespace DiscordChatExporter.Core.Discord.Data;
-
-public record ChannelCategory(Snowflake Id, string Name, int? Position) : IHasId
-{
-    public static ChannelCategory Parse(JsonElement json, int? positionHint = null)
-    {
-        var id = json.GetProperty("id").GetNonWhiteSpaceString().Pipe(Snowflake.Parse);
-
-        var name =
-            json.GetPropertyOrNull("name")?.GetNonWhiteSpaceStringOrNull() ??
-            id.ToString();
-
-        var position =
-            positionHint ??
-            json.GetPropertyOrNull("position")?.GetInt32OrNull();
-
-        return new ChannelCategory(id, name, position);
-    }
-}

DiscordChatExporter.Core/Discord/Data/ChannelKind.cs

@@ -1,7 +1,6 @@
 namespace DiscordChatExporter.Core.Discord.Data;
 
 // https://discord.com/developers/docs/resources/channel#channel-object-channel-types
-// Order of enum fields needs to match the order in the docs.
 public enum ChannelKind
 {
     GuildTextChat = 0,
@@ -17,12 +16,3 @@ public enum ChannelKind
     GuildDirectory = 14,
     GuildForum = 15
 }
-
-public static class ChannelKindExtensions
-{
-    public static bool IsDirect(this ChannelKind kind) =>
-        kind is ChannelKind.DirectTextChat or ChannelKind.DirectGroupTextChat;
-
-    public static bool IsGuild(this ChannelKind kind) =>
-        !kind.IsDirect();
-}

DiscordChatExporter.Core/Discord/Data/Common/FileSize.cs

@@ -41,10 +41,13 @@ public readonly partial record struct FileSize(long TotalBytes)
 
     [ExcludeFromCodeCoverage]
     public override string ToString() =>
-        string.Create(CultureInfo.InvariantCulture, $"{GetLargestWholeNumberValue():0.##} {GetLargestWholeNumberSymbol()}");
+        string.Create(
+            CultureInfo.InvariantCulture,
+            $"{GetLargestWholeNumberValue():0.##} {GetLargestWholeNumberSymbol()}"
+        );
 }
 
 public partial record struct FileSize
 {
     public static FileSize FromBytes(long bytes) => new(bytes);
-}
+}

DiscordChatExporter.Core/Discord/Data/Common/IHasId.cs

@@ -3,4 +3,4 @@
 public interface IHasId
 {
     Snowflake Id { get; }
-}
+}

DiscordChatExporter.Core/Discord/Data/Common/IdBasedEqualityComparer.cs

@@ -1,12 +0,0 @@
-using System.Collections.Generic;
-
-namespace DiscordChatExporter.Core.Discord.Data.Common;
-
-public class IdBasedEqualityComparer : IEqualityComparer<IHasId>
-{
-    public static IdBasedEqualityComparer Instance { get; } = new();
-
-    public bool Equals(IHasId? x, IHasId? y) => x?.Id == y?.Id;
-
-    public int GetHashCode(IHasId obj) => obj.Id.GetHashCode();
-}

DiscordChatExporter.Core/Discord/Data/Common/ImageCdn.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Globalization;
 using System.Linq;
 using DiscordChatExporter.Core.Utils.Extensions;
 
@@ -21,7 +22,7 @@ public static class ImageCdn
 
         var twemojiId = string.Join(
             "-",
-            filteredRunes.Select(r => r.Value.ToString("x"))
+            filteredRunes.Select(r => r.Value.ToString("x", CultureInfo.InvariantCulture))
         );
 
         return $"https://cdn.jsdelivr.net/gh/twitter/twemoji@latest/assets/svg/{twemojiId}.svg";
@@ -47,14 +48,19 @@ public static class ImageCdn
             ? $"https://cdn.discordapp.com/avatars/{userId}/{avatarHash}.gif?size={size}"
             : $"https://cdn.discordapp.com/avatars/{userId}/{avatarHash}.png?size={size}";
 
-    public static string GetFallbackUserAvatarUrl(int discriminator) =>
-        $"https://cdn.discordapp.com/embed/avatars/{discriminator % 5}.png";
+    public static string GetFallbackUserAvatarUrl(int index = 0) =>
+        $"https://cdn.discordapp.com/embed/avatars/{index}.png";
 
-    public static string GetMemberAvatarUrl(Snowflake guildId, Snowflake userId, string avatarHash, int size = 512) =>
+    public static string GetMemberAvatarUrl(
+        Snowflake guildId,
+        Snowflake userId,
+        string avatarHash,
+        int size = 512
+    ) =>
         avatarHash.StartsWith("a_", StringComparison.Ordinal)
             ? $"https://cdn.discordapp.com/guilds/{guildId}/users/{userId}/avatars/{avatarHash}.gif?size={size}"
             : $"https://cdn.discordapp.com/guilds/{guildId}/users/{userId}/avatars/{avatarHash}.png?size={size}";
 
     public static string GetStickerUrl(Snowflake stickerId, string format = "png") =>
         $"https://cdn.discordapp.com/stickers/{stickerId}.{format}";
-}
+}

DiscordChatExporter.Core/Discord/Data/Embeds/Embed.cs

@@ -21,7 +21,8 @@ public partial record Embed(
     EmbedImage? Thumbnail,
     IReadOnlyList<EmbedImage> Images,
     EmbedVideo? Video,
-    EmbedFooter? Footer)
+    EmbedFooter? Footer
+)
 {
     // Embeds can only have one image according to the API model,
     // but the client can render multiple images in some cases.
@@ -41,24 +42,25 @@ public partial record Embed
         var title = json.GetPropertyOrNull("title")?.GetStringOrNull();
 
         var kind =
-            json.GetPropertyOrNull("type")?.GetStringOrNull()?.ParseEnumOrNull<EmbedKind>() ??
-            EmbedKind.Rich;
+            json.GetPropertyOrNull("type")?.GetStringOrNull()?.ParseEnumOrNull<EmbedKind>()
+            ?? EmbedKind.Rich;
 
         var url = json.GetPropertyOrNull("url")?.GetNonWhiteSpaceStringOrNull();
-        var timestamp = json.GetPropertyOrNull("timestamp")?.GetDateTimeOffset();
+        var timestamp = json.GetPropertyOrNull("timestamp")?.GetDateTimeOffsetOrNull();
 
-        var color = json
-            .GetPropertyOrNull("color")?
-            .GetInt32OrNull()?
-            .Pipe(System.Drawing.Color.FromArgb)
+        var color = json.GetPropertyOrNull("color")
+            ?.GetInt32OrNull()
+            ?.Pipe(System.Drawing.Color.FromArgb)
             .ResetAlpha();
 
         var author = json.GetPropertyOrNull("author")?.Pipe(EmbedAuthor.Parse);
         var description = json.GetPropertyOrNull("description")?.GetStringOrNull();
 
         var fields =
-            json.GetPropertyOrNull("fields")?.EnumerateArrayOrNull()?.Select(EmbedField.Parse).ToArray() ??
-            Array.Empty<EmbedField>();
+            json.GetPropertyOrNull("fields")
+                ?.EnumerateArrayOrNull()
+                ?.Select(EmbedField.Parse)
+                .ToArray() ?? Array.Empty<EmbedField>();
 
         var thumbnail = json.GetPropertyOrNull("thumbnail")?.Pipe(EmbedImage.Parse);
 
@@ -70,8 +72,10 @@ public partial record Embed
         // with this by merging related embeds at the end of the message parsing process.
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/695
         var images =
-            json.GetPropertyOrNull("image")?.Pipe(EmbedImage.Parse).Enumerate().ToArray() ??
-            Array.Empty<EmbedImage>();
+            json.GetPropertyOrNull("image")
+                ?.Pipe(EmbedImage.Parse)
+                .ToSingletonEnumerable()
+                .ToArray() ?? Array.Empty<EmbedImage>();
 
         var video = json.GetPropertyOrNull("video")?.Pipe(EmbedVideo.Parse);
 
@@ -92,4 +96,4 @@ public partial record Embed
             footer
         );
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/Embeds/EmbedAuthor.cs

@@ -4,11 +4,7 @@ using JsonExtensions.Reading;
 namespace DiscordChatExporter.Core.Discord.Data.Embeds;
 
 // https://discord.com/developers/docs/resources/channel#embed-object-embed-author-structure
-public record EmbedAuthor(
-    string? Name,
-    string? Url,
-    string? IconUrl,
-    string? IconProxyUrl)
+public record EmbedAuthor(string? Name, string? Url, string? IconUrl, string? IconProxyUrl)
 {
     public static EmbedAuthor Parse(JsonElement json)
     {
@@ -19,4 +15,4 @@ public record EmbedAuthor(
 
         return new EmbedAuthor(name, url, iconUrl, iconProxyUrl);
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/Embeds/EmbedField.cs

@@ -4,10 +4,7 @@ using JsonExtensions.Reading;
 namespace DiscordChatExporter.Core.Discord.Data.Embeds;
 
 // https://discord.com/developers/docs/resources/channel#embed-object-embed-field-structure
-public record EmbedField(
-    string Name,
-    string Value,
-    bool IsInline)
+public record EmbedField(string Name, string Value, bool IsInline)
 {
     public static EmbedField Parse(JsonElement json)
     {
@@ -17,4 +14,4 @@ public record EmbedField(
 
         return new EmbedField(name, value, isInline);
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/Embeds/EmbedFooter.cs

@@ -4,10 +4,7 @@ using JsonExtensions.Reading;
 namespace DiscordChatExporter.Core.Discord.Data.Embeds;
 
 // https://discord.com/developers/docs/resources/channel#embed-object-embed-footer-structure
-public record EmbedFooter(
-    string Text,
-    string? IconUrl,
-    string? IconProxyUrl)
+public record EmbedFooter(string Text, string? IconUrl, string? IconProxyUrl)
 {
     public static EmbedFooter Parse(JsonElement json)
     {
@@ -17,4 +14,4 @@ public record EmbedFooter(
 
         return new EmbedFooter(text, iconUrl, iconProxyUrl);
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/Embeds/EmbedImage.cs

@@ -4,11 +4,7 @@ using JsonExtensions.Reading;
 namespace DiscordChatExporter.Core.Discord.Data.Embeds;
 
 // https://discord.com/developers/docs/resources/channel#embed-object-embed-image-structure
-public record EmbedImage(
-    string? Url,
-    string? ProxyUrl,
-    int? Width,
-    int? Height)
+public record EmbedImage(string? Url, string? ProxyUrl, int? Width, int? Height)
 {
     public static EmbedImage Parse(JsonElement json)
     {
@@ -19,4 +15,4 @@ public record EmbedImage(
 
         return new EmbedImage(url, proxyUrl, width, height);
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/Embeds/EmbedKind.cs

@@ -8,4 +8,4 @@ public enum EmbedKind
     Video,
     Gifv,
     Link
-}
+}

DiscordChatExporter.Core/Discord/Data/Embeds/EmbedVideo.cs

@@ -4,11 +4,7 @@ using System.Text.Json;
 namespace DiscordChatExporter.Core.Discord.Data.Embeds;
 
 // https://discord.com/developers/docs/resources/channel#embed-object-embed-video-structure
-public record EmbedVideo(
-    string? Url,
-    string? ProxyUrl,
-    int? Width,
-    int? Height)
+public record EmbedVideo(string? Url, string? ProxyUrl, int? Width, int? Height)
 {
     public static EmbedVideo Parse(JsonElement json)
     {
@@ -19,4 +15,4 @@ public record EmbedVideo(
 
         return new EmbedVideo(url, proxyUrl, width, height);
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/Embeds/SpotifyTrackEmbedProjection.cs

@@ -12,7 +12,9 @@ public partial record SpotifyTrackEmbedProjection
     private static string? TryParseTrackId(string embedUrl)
     {
         // https://open.spotify.com/track/1LHZMWefF9502NPfArRfvP?si=3efac6ce9be04f0a
-        var trackId = Regex.Match(embedUrl, @"spotify\.com/track/(.*?)(?:\?|&|/|$)").Groups[1].Value;
+        var trackId = Regex.Match(embedUrl, @"spotify\.com/track/(.*?)(?:\?|&|/|$)").Groups[
+            1
+        ].Value;
         if (!string.IsNullOrWhiteSpace(trackId))
             return trackId;
 
@@ -33,4 +35,4 @@ public partial record SpotifyTrackEmbedProjection
 
         return new SpotifyTrackEmbedProjection(trackId);
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/Embeds/YouTubeVideoEmbedProjection.cs

@@ -1,6 +1,4 @@
-using System.Text.RegularExpressions;
-
-namespace DiscordChatExporter.Core.Discord.Data.Embeds;
+namespace DiscordChatExporter.Core.Discord.Data.Embeds;
 
 public partial record YouTubeVideoEmbedProjection(string VideoId)
 {
@@ -9,37 +7,6 @@ public partial record YouTubeVideoEmbedProjection(string VideoId)
 
 public partial record YouTubeVideoEmbedProjection
 {
-    // Adapted from YoutubeExplode
-    // https://github.com/Tyrrrz/YoutubeExplode/blob/bc700b631bd105d0be208a88116347034bdca88b/YoutubeExplode/Videos/VideoId.cs#L40-L62
-    private static string? TryParseVideoId(string embedUrl)
-    {
-        // Regular URL
-        // https://www.youtube.com/watch?v=yIVRs6YSbOM
-        var regularMatch = Regex.Match(embedUrl, @"youtube\..+?/watch.*?v=(.*?)(?:&|/|$)").Groups[1].Value;
-        if (!string.IsNullOrWhiteSpace(regularMatch))
-            return regularMatch;
-
-        // Short URL
-        // https://youtu.be/yIVRs6YSbOM
-        var shortMatch = Regex.Match(embedUrl, @"youtu\.be/(.*?)(?:\?|&|/|$)").Groups[1].Value;
-        if (!string.IsNullOrWhiteSpace(shortMatch))
-            return shortMatch;
-
-        // Embed URL
-        // https://www.youtube.com/embed/yIVRs6YSbOM
-        var embedMatch = Regex.Match(embedUrl, @"youtube\..+?/embed/(.*?)(?:\?|&|/|$)").Groups[1].Value;
-        if (!string.IsNullOrWhiteSpace(embedMatch))
-            return embedMatch;
-
-        // Shorts URL
-        // https://www.youtube.com/shorts/sKL1vjP0tIo
-        var shortsMatch = Regex.Match(embedUrl, @"youtube\..+?/shorts/(.*?)(?:\?|&|/|$)").Groups[1].Value;
-        if (!string.IsNullOrWhiteSpace(shortsMatch))
-            return shortsMatch;
-
-        return null;
-    }
-
     public static YouTubeVideoEmbedProjection? TryResolve(Embed embed)
     {
         if (embed.Kind != EmbedKind.Video)
@@ -48,10 +15,10 @@ public partial record YouTubeVideoEmbedProjection
         if (string.IsNullOrWhiteSpace(embed.Url))
             return null;
 
-        var videoId = TryParseVideoId(embed.Url);
-        if (string.IsNullOrWhiteSpace(videoId))
+        var videoId = YoutubeExplode.Videos.VideoId.TryParse(embed.Url);
+        if (videoId is null)
             return null;
 
         return new YouTubeVideoEmbedProjection(videoId);
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/Emoji.cs

@@ -14,12 +14,11 @@ public partial record Emoji(
     // Name of a custom emoji (e.g. LUL) or actual representation of a standard emoji (e.g. 🙂)
     string Name,
     bool IsAnimated,
-    string ImageUrl)
+    string ImageUrl
+)
 {
     // Name of a custom emoji (e.g. LUL) or name of a standard emoji (e.g. slight_smile)
-    public string Code => Id is not null
-        ? Name
-        : EmojiIndex.TryGetCode(Name) ?? Name;
+    public string Code => Id is not null ? Name : EmojiIndex.TryGetCode(Name) ?? Name;
 }
 
 public partial record Emoji
@@ -34,25 +33,22 @@ public partial record Emoji
         if (!string.IsNullOrWhiteSpace(name))
             return ImageCdn.GetStandardEmojiUrl(name);
 
-        // Either ID or name should be set
-        throw new ApplicationException("Emoji has neither ID nor name set.");
+        throw new InvalidOperationException("Either the emoji ID or name should be provided.");
     }
 
     public static Emoji Parse(JsonElement json)
     {
-        var id = json.GetPropertyOrNull("id")?.GetNonWhiteSpaceStringOrNull()?.Pipe(Snowflake.Parse);
+        var id = json.GetPropertyOrNull("id")
+            ?.GetNonWhiteSpaceStringOrNull()
+            ?.Pipe(Snowflake.Parse);
 
         // Names may be missing on custom emoji within reactions
-        var name = json.GetPropertyOrNull("name")?.GetNonWhiteSpaceStringOrNull() ?? "Unknown Emoji";
+        var name =
+            json.GetPropertyOrNull("name")?.GetNonWhiteSpaceStringOrNull() ?? "Unknown Emoji";
 
         var isAnimated = json.GetPropertyOrNull("animated")?.GetBooleanOrNull() ?? false;
         var imageUrl = GetImageUrl(id, name, isAnimated);
 
-        return new Emoji(
-            id,
-            name,
-            isAnimated,
-            imageUrl
-        );
+        return new Emoji(id, name, isAnimated, imageUrl);
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/Guild.cs

@@ -6,14 +6,16 @@ using JsonExtensions.Reading;
 namespace DiscordChatExporter.Core.Discord.Data;
 
 // https://discord.com/developers/docs/resources/guild#guild-object
-public record Guild(Snowflake Id, string Name, string IconUrl) : IHasId
+public partial record Guild(Snowflake Id, string Name, string IconUrl) : IHasId
+{
+    public bool IsDirect => Id == DirectMessages.Id;
+}
+
+public partial record Guild
 {
     // Direct messages are encapsulated within a special pseudo-guild for consistency
-    public static Guild DirectMessages { get; } = new(
-        Snowflake.Zero,
-        "Direct Messages",
-        ImageCdn.GetFallbackUserAvatarUrl(0)
-    );
+    public static Guild DirectMessages { get; } =
+        new(Snowflake.Zero, "Direct Messages", ImageCdn.GetFallbackUserAvatarUrl());
 
     public static Guild Parse(JsonElement json)
     {
@@ -21,12 +23,10 @@ public record Guild(Snowflake Id, string Name, string IconUrl) : IHasId
         var name = json.GetProperty("name").GetNonNullString();
 
         var iconUrl =
-            json
-                .GetPropertyOrNull("icon")?
-                .GetNonWhiteSpaceStringOrNull()?
-                .Pipe(h => ImageCdn.GetGuildIconUrl(id, h)) ??
-            ImageCdn.GetFallbackUserAvatarUrl(0);
+            json.GetPropertyOrNull("icon")
+                ?.GetNonWhiteSpaceStringOrNull()
+                ?.Pipe(h => ImageCdn.GetGuildIconUrl(id, h)) ?? ImageCdn.GetFallbackUserAvatarUrl();
 
         return new Guild(id, name, iconUrl);
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/Interaction.cs

@@ -15,4 +15,4 @@ public record Interaction(Snowflake Id, string Name, User User)
 
         return new Interaction(id, name, user);
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/Invite.cs

@@ -6,10 +6,7 @@ using JsonExtensions.Reading;
 namespace DiscordChatExporter.Core.Discord.Data;
 
 // https://discord.com/developers/docs/resources/invite#invite-object
-public record Invite(
-    string Code,
-    Guild Guild,
-    Channel? Channel)
+public record Invite(string Code, Guild Guild, Channel? Channel)
 {
     public static string? TryGetCodeFromUrl(string url) =>
         Regex.Match(url, @"^https?://discord\.gg/(\w+)/?$").Groups[1].Value.NullIfWhiteSpace();
@@ -22,4 +19,4 @@ public record Invite(
 
         return new Invite(code, guild, channel);
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/Member.cs

@@ -11,39 +11,37 @@ namespace DiscordChatExporter.Core.Discord.Data;
 // https://discord.com/developers/docs/resources/guild#guild-member-object
 public partial record Member(
     User User,
-    string? Nick,
+    string? DisplayName,
     string? AvatarUrl,
-    IReadOnlyList<Snowflake> RoleIds) : IHasId
+    IReadOnlyList<Snowflake> RoleIds
+) : IHasId
 {
     public Snowflake Id => User.Id;
 }
 
 public partial record Member
 {
+    public static Member CreateFallback(User user) =>
+        new(user, null, null, Array.Empty<Snowflake>());
+
     public static Member Parse(JsonElement json, Snowflake? guildId = null)
     {
         var user = json.GetProperty("user").Pipe(User.Parse);
-        var nick = json.GetPropertyOrNull("nick")?.GetNonWhiteSpaceStringOrNull();
+        var displayName = json.GetPropertyOrNull("nick")?.GetNonWhiteSpaceStringOrNull();
 
-        var roleIds = json
-            .GetPropertyOrNull("roles")?
-            .EnumerateArray()
-            .Select(j => j.GetNonWhiteSpaceString())
-            .Select(Snowflake.Parse)
-            .ToArray() ?? Array.Empty<Snowflake>();
+        var roleIds =
+            json.GetPropertyOrNull("roles")
+                ?.EnumerateArray()
+                .Select(j => j.GetNonWhiteSpaceString())
+                .Select(Snowflake.Parse)
+                .ToArray() ?? Array.Empty<Snowflake>();
 
         var avatarUrl = guildId is not null
-            ? json
-                .GetPropertyOrNull("avatar")?
-                .GetNonWhiteSpaceStringOrNull()?
-                .Pipe(h => ImageCdn.GetMemberAvatarUrl(guildId.Value, user.Id, h))
+            ? json.GetPropertyOrNull("avatar")
+                ?.GetNonWhiteSpaceStringOrNull()
+                ?.Pipe(h => ImageCdn.GetMemberAvatarUrl(guildId.Value, user.Id, h))
             : null;
 
-        return new Member(
-            user,
-            nick,
-            avatarUrl,
-            roleIds
-        );
+        return new Member(user, displayName, avatarUrl, roleIds);
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/Message.cs

@@ -27,9 +27,16 @@ public partial record Message(
     IReadOnlyList<User> MentionedUsers,
     MessageReference? Reference,
     Message? ReferencedMessage,
-    Interaction? Interaction) : IHasId
+    Interaction? Interaction
+) : IHasId
 {
-    public bool IsReplyLike => Kind == MessageKind.Reply || Interaction is not null;
+    public bool IsSystemNotification =>
+        Kind is >= MessageKind.RecipientAdd and <= MessageKind.ThreadCreated;
+
+    public bool IsReply => Kind == MessageKind.Reply;
+
+    // App interactions are rendered as replies in the Discord client, but they are not actually replies
+    public bool IsReplyLike => IsReply || Interaction is not null;
 
     public IEnumerable<User> GetReferencedUsers()
     {
@@ -70,22 +77,26 @@ public partial record Message
                 // Find embeds with the same URL that only contain a single image and nothing else
                 var trailingEmbeds = embeds
                     .Skip(i + 1)
-                    .TakeWhile(e =>
-                        e.Url == embed.Url &&
-                        e.Timestamp is null &&
-                        e.Author is null &&
-                        e.Color is null &&
-                        string.IsNullOrWhiteSpace(e.Description) &&
-                        !e.Fields.Any() &&
-                        e.Images.Count == 1 &&
-                        e.Footer is null
+                    .TakeWhile(
+                        e =>
+                            e.Url == embed.Url
+                            && e.Timestamp is null
+                            && e.Author is null
+                            && e.Color is null
+                            && string.IsNullOrWhiteSpace(e.Description)
+                            && !e.Fields.Any()
+                            && e.Images.Count == 1
+                            && e.Footer is null
                     )
                     .ToArray();
 
                 if (trailingEmbeds.Any())
                 {
                     // Concatenate all images into one embed
-                    var images = embed.Images.Concat(trailingEmbeds.SelectMany(e => e.Images)).ToArray();
+                    var images = embed.Images
+                        .Concat(trailingEmbeds.SelectMany(e => e.Images))
+                        .ToArray();
+
                     normalizedEmbeds.Add(embed with { Images = images });
 
                     i += trailingEmbeds.Length;
@@ -108,41 +119,49 @@ public partial record Message
     {
         var id = json.GetProperty("id").GetNonWhiteSpaceString().Pipe(Snowflake.Parse);
         var kind = (MessageKind)json.GetProperty("type").GetInt32();
-        var flags = (MessageFlags?)json.GetPropertyOrNull("flags")?.GetInt32() ?? MessageFlags.None;
+        var flags =
+            (MessageFlags?)json.GetPropertyOrNull("flags")?.GetInt32OrNull() ?? MessageFlags.None;
         var author = json.GetProperty("author").Pipe(User.Parse);
 
         var timestamp = json.GetProperty("timestamp").GetDateTimeOffset();
-        var editedTimestamp = json.GetPropertyOrNull("edited_timestamp")?.GetDateTimeOffset();
-        var callEndedTimestamp = json
-            .GetPropertyOrNull("call")?
-            .GetPropertyOrNull("ended_timestamp")?
-            .GetDateTimeOffset();
+        var editedTimestamp = json.GetPropertyOrNull("edited_timestamp")?.GetDateTimeOffsetOrNull();
+
+        var callEndedTimestamp = json.GetPropertyOrNull("call")
+            ?.GetPropertyOrNull("ended_timestamp")
+            ?.GetDateTimeOffsetOrNull();
 
         var isPinned = json.GetPropertyOrNull("pinned")?.GetBooleanOrNull() ?? false;
         var content = json.GetPropertyOrNull("content")?.GetStringOrNull() ?? "";
 
         var attachments =
-            json.GetPropertyOrNull("attachments")?.EnumerateArrayOrNull()?.Select(Attachment.Parse).ToArray() ??
-            Array.Empty<Attachment>();
+            json.GetPropertyOrNull("attachments")
+                ?.EnumerateArrayOrNull()
+                ?.Select(Attachment.Parse)
+                .ToArray() ?? Array.Empty<Attachment>();
 
         var embeds = NormalizeEmbeds(
-            json.GetPropertyOrNull("embeds")?.EnumerateArrayOrNull()?.Select(Embed.Parse).ToArray() ??
-            Array.Empty<Embed>()
+            json.GetPropertyOrNull("embeds")?.EnumerateArrayOrNull()?.Select(Embed.Parse).ToArray()
+                ?? Array.Empty<Embed>()
         );
 
         var stickers =
-            json.GetPropertyOrNull("sticker_items")?.EnumerateArrayOrNull()?.Select(Sticker.Parse).ToArray() ??
-            Array.Empty<Sticker>();
+            json.GetPropertyOrNull("sticker_items")
+                ?.EnumerateArrayOrNull()
+                ?.Select(Sticker.Parse)
+                .ToArray() ?? Array.Empty<Sticker>();
 
         var reactions =
-            json.GetPropertyOrNull("reactions")?.EnumerateArrayOrNull()?.Select(Reaction.Parse).ToArray() ??
-            Array.Empty<Reaction>();
+            json.GetPropertyOrNull("reactions")
+                ?.EnumerateArrayOrNull()
+                ?.Select(Reaction.Parse)
+                .ToArray() ?? Array.Empty<Reaction>();
 
         var mentionedUsers =
-            json.GetPropertyOrNull("mentions")?.EnumerateArrayOrNull()?.Select(User.Parse).ToArray() ??
-            Array.Empty<User>();
+            json.GetPropertyOrNull("mentions")?.EnumerateArrayOrNull()?.Select(User.Parse).ToArray()
+            ?? Array.Empty<User>();
 
-        var messageReference = json.GetPropertyOrNull("message_reference")?.Pipe(MessageReference.Parse);
+        var messageReference = json.GetPropertyOrNull("message_reference")
+            ?.Pipe(MessageReference.Parse);
         var referencedMessage = json.GetPropertyOrNull("referenced_message")?.Pipe(Parse);
         var interaction = json.GetPropertyOrNull("interaction")?.Pipe(Interaction.Parse);
 
@@ -166,4 +185,4 @@ public partial record Message
             interaction
         );
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/MessageFlags.cs

@@ -15,4 +15,4 @@ public enum MessageFlags
     HasThread = 32,
     Ephemeral = 64,
     Loading = 128
-}
+}

DiscordChatExporter.Core/Discord/Data/MessageKind.cs

@@ -14,8 +14,3 @@ public enum MessageKind
     ThreadCreated = 18,
     Reply = 19
 }
-
-public static class MessageKindExtensions
-{
-    public static bool IsSystemNotification(this MessageKind c) => (int)c is >= 1 and <= 18;
-}

DiscordChatExporter.Core/Discord/Data/MessageReference.cs

@@ -9,21 +9,18 @@ public record MessageReference(Snowflake? MessageId, Snowflake? ChannelId, Snowf
 {
     public static MessageReference Parse(JsonElement json)
     {
-        var messageId = json
-            .GetPropertyOrNull("message_id")?
-            .GetNonWhiteSpaceStringOrNull()?
-            .Pipe(Snowflake.Parse);
+        var messageId = json.GetPropertyOrNull("message_id")
+            ?.GetNonWhiteSpaceStringOrNull()
+            ?.Pipe(Snowflake.Parse);
 
-        var channelId = json
-            .GetPropertyOrNull("channel_id")?
-            .GetNonWhiteSpaceStringOrNull()?
-            .Pipe(Snowflake.Parse);
+        var channelId = json.GetPropertyOrNull("channel_id")
+            ?.GetNonWhiteSpaceStringOrNull()
+            ?.Pipe(Snowflake.Parse);
 
-        var guildId = json
-            .GetPropertyOrNull("guild_id")?
-            .GetNonWhiteSpaceStringOrNull()?
-            .Pipe(Snowflake.Parse);
+        var guildId = json.GetPropertyOrNull("guild_id")
+            ?.GetNonWhiteSpaceStringOrNull()
+            ?.Pipe(Snowflake.Parse);
 
         return new MessageReference(messageId, channelId, guildId);
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/Reaction.cs

@@ -13,4 +13,4 @@ public record Reaction(Emoji Emoji, int Count)
 
         return new Reaction(emoji, count);
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/Role.cs

@@ -15,13 +15,12 @@ public record Role(Snowflake Id, string Name, int Position, Color? Color) : IHas
         var name = json.GetProperty("name").GetNonNullString();
         var position = json.GetProperty("position").GetInt32();
 
-        var color = json
-            .GetPropertyOrNull("color")?
-            .GetInt32()
-            .Pipe(System.Drawing.Color.FromArgb)
+        var color = json.GetPropertyOrNull("color")
+            ?.GetInt32OrNull()
+            ?.Pipe(System.Drawing.Color.FromArgb)
             .ResetAlpha()
             .NullIf(c => c.ToRgb() <= 0);
 
         return new Role(id, name, position, color);
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/Sticker.cs

@@ -15,14 +15,17 @@ public record Sticker(Snowflake Id, string Name, StickerFormat Format, string So
         var name = json.GetProperty("name").GetNonNullString();
         var format = (StickerFormat)json.GetProperty("format_type").GetInt32();
 
-        var sourceUrl = ImageCdn.GetStickerUrl(id, format switch
-        {
-            StickerFormat.Png => "png",
-            StickerFormat.Apng => "png",
-            StickerFormat.Lottie => "json",
-            _ => throw new InvalidOperationException($"Unknown sticker format '{format}'.")
-        });
+        var sourceUrl = ImageCdn.GetStickerUrl(
+            id,
+            format switch
+            {
+                StickerFormat.Png => "png",
+                StickerFormat.Apng => "png",
+                StickerFormat.Lottie => "json",
+                _ => throw new InvalidOperationException($"Unknown sticker format '{format}'.")
+            }
+        );
 
         return new Sticker(id, name, format, sourceUrl);
     }
-}
+}

DiscordChatExporter.Core/Discord/Data/StickerFormat.cs

@@ -5,4 +5,4 @@ public enum StickerFormat
     Png = 1,
     Apng = 2,
     Lottie = 3
-}
+}

DiscordChatExporter.Core/Discord/Data/User.cs

@@ -9,13 +9,22 @@ namespace DiscordChatExporter.Core.Discord.Data;
 public partial record User(
     Snowflake Id,
     bool IsBot,
-    int Discriminator,
+    // Remove after Discord migrates all accounts to the new system.
+    // With that, also remove the DiscriminatorFormatted and FullName properties.
+    // Replace existing calls to FullName with Name (not DisplayName).
+    int? Discriminator,
     string Name,
-    string AvatarUrl) : IHasId
+    string DisplayName,
+    string AvatarUrl
+) : IHasId
 {
-    public string DiscriminatorFormatted => $"{Discriminator:0000}";
+    public string DiscriminatorFormatted =>
+        Discriminator is not null ? $"{Discriminator:0000}" : "0000";
 
-    public string FullName => $"{Name}#{DiscriminatorFormatted}";
+    // This effectively represents the user's true identity.
+    // In the old system, this is formed from the username and discriminator.
+    // In the new system, the username is already the user's unique identifier.
+    public string FullName => Discriminator is not null ? $"{Name}#{DiscriminatorFormatted}" : Name;
 }
 
 public partial record User
@@ -24,16 +33,24 @@ public partial record User
     {
         var id = json.GetProperty("id").GetNonWhiteSpaceString().Pipe(Snowflake.Parse);
         var isBot = json.GetPropertyOrNull("bot")?.GetBooleanOrNull() ?? false;
-        var discriminator = json.GetProperty("discriminator").GetNonWhiteSpaceString().Pipe(int.Parse);
+
+        var discriminator = json.GetPropertyOrNull("discriminator")
+            ?.GetNonWhiteSpaceStringOrNull()
+            ?.Pipe(int.Parse)
+            .NullIfDefault();
+
         var name = json.GetProperty("username").GetNonNullString();
+        var displayName =
+            json.GetPropertyOrNull("global_name")?.GetNonWhiteSpaceStringOrNull() ?? name;
+
+        var avatarIndex = discriminator % 5 ?? (int)((id.Value >> 22) % 6);
 
         var avatarUrl =
-            json
-                .GetPropertyOrNull("avatar")?
-                .GetNonWhiteSpaceStringOrNull()?
-                .Pipe(h => ImageCdn.GetUserAvatarUrl(id, h)) ??
-            ImageCdn.GetFallbackUserAvatarUrl(discriminator);
+            json.GetPropertyOrNull("avatar")
+                ?.GetNonWhiteSpaceStringOrNull()
+                ?.Pipe(h => ImageCdn.GetUserAvatarUrl(id, h))
+            ?? ImageCdn.GetFallbackUserAvatarUrl(avatarIndex);
 
-        return new User(id, isBot, discriminator, name, avatarUrl);
+        return new User(id, isBot, discriminator, name, displayName, avatarUrl);
     }
-}
+}

DiscordChatExporter.Core/Discord/DiscordClient.cs

@@ -30,48 +30,46 @@ public class DiscordClient
     private async ValueTask<HttpResponseMessage> GetResponseAsync(
         string url,
         TokenKind tokenKind,
-        CancellationToken cancellationToken = default)
+        CancellationToken cancellationToken = default
+    )
     {
-        return await Http.ResponseResiliencePolicy.ExecuteAsync(async innerCancellationToken =>
-        {
-            using var request = new HttpRequestMessage(HttpMethod.Get, new Uri(_baseUri, url));
-
-            // Don't validate because the token can have special characters
-            // https://github.com/Tyrrrz/DiscordChatExporter/issues/828
-            request.Headers.TryAddWithoutValidation(
-                "Authorization",
-                tokenKind == TokenKind.Bot
-                    ? $"Bot {_token}"
-                    : _token
-            );
-
-            var response = await Http.Client.SendAsync(
-                request,
-                HttpCompletionOption.ResponseHeadersRead,
-                innerCancellationToken
-            );
-
-            // If this was the last request available before hitting the rate limit,
-            // wait out the reset time so that future requests can succeed.
-            // This may add an unnecessary delay in case the user doesn't intend to
-            // make any more requests, but implementing a smarter solution would
-            // require properly keeping track of Discord's global/per-route/per-resource
-            // rate limits and that's just way too much effort.
-            // https://discord.com/developers/docs/topics/rate-limits
-            var remainingRequestCount = response
-                .Headers
-                .TryGetValue("X-RateLimit-Remaining")?
-                .Pipe(s => int.Parse(s, CultureInfo.InvariantCulture));
-
-            var resetAfterDelay = response
-                .Headers
-                .TryGetValue("X-RateLimit-Reset-After")?
-                .Pipe(s => double.Parse(s, CultureInfo.InvariantCulture))
-                .Pipe(TimeSpan.FromSeconds);
-
-            if (remainingRequestCount <= 0 && resetAfterDelay is not null)
+        return await Http.ResponseResiliencePolicy.ExecuteAsync(
+            async innerCancellationToken =>
             {
-                var delay =
+                using var request = new HttpRequestMessage(HttpMethod.Get, new Uri(_baseUri, url));
+
+                // Don't validate because the token can have special characters
+                // https://github.com/Tyrrrz/DiscordChatExporter/issues/828
+                request.Headers.TryAddWithoutValidation(
+                    "Authorization",
+                    tokenKind == TokenKind.Bot ? $"Bot {_token}" : _token
+                );
+
+                var response = await Http.Client.SendAsync(
+                    request,
+                    HttpCompletionOption.ResponseHeadersRead,
+                    innerCancellationToken
+                );
+
+                // If this was the last request available before hitting the rate limit,
+                // wait out the reset time so that future requests can succeed.
+                // This may add an unnecessary delay in case the user doesn't intend to
+                // make any more requests, but implementing a smarter solution would
+                // require properly keeping track of Discord's global/per-route/per-resource
+                // rate limits and that's just way too much effort.
+                // https://discord.com/developers/docs/topics/rate-limits
+                var remainingRequestCount = response.Headers
+                    .TryGetValue("X-RateLimit-Remaining")
+                    ?.Pipe(s => int.Parse(s, CultureInfo.InvariantCulture));
+
+                var resetAfterDelay = response.Headers
+                    .TryGetValue("X-RateLimit-Reset-After")
+                    ?.Pipe(s => double.Parse(s, CultureInfo.InvariantCulture))
+                    .Pipe(TimeSpan.FromSeconds);
+
+                if (remainingRequestCount <= 0 && resetAfterDelay is not null)
+                {
+                    var delay =
                     // Adding a small buffer to the reset time reduces the chance of getting
                     // rate limited again, because it allows for more requests to be released.
                     (resetAfterDelay.Value + TimeSpan.FromSeconds(1))
@@ -79,14 +77,18 @@ public class DiscordClient
                     // is not actually enforced by the server. So we cap it at a reasonable value.
                     .Clamp(TimeSpan.Zero, TimeSpan.FromSeconds(60));
 
-                await Task.Delay(delay, innerCancellationToken);
-            }
+                    await Task.Delay(delay, innerCancellationToken);
+                }
 
-            return response;
-        }, cancellationToken);
+                return response;
+            },
+            cancellationToken
+        );
     }
 
-    private async ValueTask<TokenKind> GetTokenKindAsync(CancellationToken cancellationToken = default)
+    private async ValueTask<TokenKind> GetTokenKindAsync(
+        CancellationToken cancellationToken = default
+    )
     {
         // Try authenticating as a user
         using var userResponse = await GetResponseAsync(
@@ -108,12 +110,13 @@ public class DiscordClient
         if (botResponse.StatusCode != HttpStatusCode.Unauthorized)
             return TokenKind.Bot;
 
-        throw DiscordChatExporterException.Unauthorized();
+        throw new DiscordChatExporterException("Authentication token is invalid.", true);
     }
 
     private async ValueTask<HttpResponseMessage> GetResponseAsync(
         string url,
-        CancellationToken cancellationToken = default)
+        CancellationToken cancellationToken = default
+    )
     {
         var tokenKind = _resolvedTokenKind ??= await GetTokenKindAsync(cancellationToken);
         return await GetResponseAsync(url, tokenKind, cancellationToken);
@@ -121,7 +124,8 @@ public class DiscordClient
 
     private async ValueTask<JsonElement> GetJsonResponseAsync(
         string url,
-        CancellationToken cancellationToken = default)
+        CancellationToken cancellationToken = default
+    )
     {
         using var response = await GetResponseAsync(url, cancellationToken);
 
@@ -129,10 +133,30 @@ public class DiscordClient
         {
             throw response.StatusCode switch
             {
-                HttpStatusCode.Unauthorized => DiscordChatExporterException.Unauthorized(),
-                HttpStatusCode.Forbidden => DiscordChatExporterException.Forbidden(),
-                HttpStatusCode.NotFound => DiscordChatExporterException.NotFound(url),
-                _ => DiscordChatExporterException.FailedHttpRequest(response)
+                HttpStatusCode.Unauthorized
+                    => throw new DiscordChatExporterException(
+                        "Authentication token is invalid.",
+                        true
+                    ),
+
+                HttpStatusCode.Forbidden
+                    => throw new DiscordChatExporterException(
+                        $"Request to '{url}' failed: forbidden."
+                    ),
+
+                HttpStatusCode.NotFound
+                    => throw new DiscordChatExporterException(
+                        $"Request to '{url}' failed: not found."
+                    ),
+
+                _
+                    => throw new DiscordChatExporterException(
+                        $"""
+                    Request to '{url}' failed: {response.StatusCode.ToString().ToSpaceSeparatedWords().ToLowerInvariant()}.
+                    Response content: {await response.Content.ReadAsStringAsync(cancellationToken)}
+                    """,
+                        true
+                    )
             };
         }
 
@@ -141,22 +165,31 @@ public class DiscordClient
 
     private async ValueTask<JsonElement?> TryGetJsonResponseAsync(
         string url,
-        CancellationToken cancellationToken = default)
+        CancellationToken cancellationToken = default
+    )
     {
         using var response = await GetResponseAsync(url, cancellationToken);
-
         return response.IsSuccessStatusCode
             ? await response.Content.ReadAsJsonAsync(cancellationToken)
             : null;
     }
 
+    public async ValueTask<User?> TryGetUserAsync(
+        Snowflake userId,
+        CancellationToken cancellationToken = default
+    )
+    {
+        var response = await TryGetJsonResponseAsync($"users/{userId}", cancellationToken);
+        return response?.Pipe(User.Parse);
+    }
+
     public async IAsyncEnumerable<Guild> GetUserGuildsAsync(
-        [EnumeratorCancellation] CancellationToken cancellationToken = default)
+        [EnumeratorCancellation] CancellationToken cancellationToken = default
+    )
     {
         yield return Guild.DirectMessages;
 
         var currentAfter = Snowflake.Zero;
-
         while (true)
         {
             var url = new UrlBuilder()
@@ -167,23 +200,25 @@ public class DiscordClient
 
             var response = await GetJsonResponseAsync(url, cancellationToken);
 
-            var isEmpty = true;
-            foreach (var guild in response.EnumerateArray().Select(Guild.Parse))
+            var count = 0;
+            foreach (var guildJson in response.EnumerateArray())
             {
+                var guild = Guild.Parse(guildJson);
                 yield return guild;
 
                 currentAfter = guild.Id;
-                isEmpty = false;
+                count++;
             }
 
-            if (isEmpty)
+            if (count <= 0)
                 yield break;
         }
     }
 
     public async ValueTask<Guild> GetGuildAsync(
         Snowflake guildId,
-        CancellationToken cancellationToken = default)
+        CancellationToken cancellationToken = default
+    )
     {
         if (guildId == Guild.DirectMessages.Id)
             return Guild.DirectMessages;
@@ -194,7 +229,8 @@ public class DiscordClient
 
     public async IAsyncEnumerable<Channel> GetGuildChannelsAsync(
         Snowflake guildId,
-        [EnumeratorCancellation] CancellationToken cancellationToken = default)
+        [EnumeratorCancellation] CancellationToken cancellationToken = default
+    )
     {
         if (guildId == Guild.DirectMessages.Id)
         {
@@ -204,49 +240,243 @@ public class DiscordClient
         }
         else
         {
-            var response = await GetJsonResponseAsync($"guilds/{guildId}/channels", cancellationToken);
+            var response = await GetJsonResponseAsync(
+                $"guilds/{guildId}/channels",
+                cancellationToken
+            );
 
-            var responseOrdered = response
+            var channelsJson = response
                 .EnumerateArray()
                 .OrderBy(j => j.GetProperty("position").GetInt32())
                 .ThenBy(j => j.GetProperty("id").GetNonWhiteSpaceString().Pipe(Snowflake.Parse))
                 .ToArray();
 
-            var categories = responseOrdered
-                .Where(j => j.GetProperty("type").GetInt32() == (int) ChannelKind.GuildCategory)
-                .Select((j, index) => ChannelCategory.Parse(j, index + 1))
-                .ToDictionary(j => j.Id.ToString(), StringComparer.Ordinal);
+            var parentsById = channelsJson
+                .Where(j => j.GetProperty("type").GetInt32() == (int)ChannelKind.GuildCategory)
+                .Select((j, i) => Channel.Parse(j, null, i + 1))
+                .ToDictionary(j => j.Id);
 
-            // Discord positions are not deterministic, so we need to normalize them
-            // because the user may refer to the channel position via file name template.
+            // Discord channel positions are relative, so we need to normalize them
+            // so that the user may refer to them more easily in file name templates.
             var position = 0;
 
-            foreach (var channelJson in responseOrdered)
+            foreach (var channelJson in channelsJson)
             {
-                var parentId = channelJson.GetPropertyOrNull("parent_id")?.GetNonWhiteSpaceStringOrNull();
-
-                var category = !string.IsNullOrWhiteSpace(parentId)
-                    ? categories.GetValueOrDefault(parentId)
-                    : null;
-
-                var channel = Channel.Parse(channelJson, category, position);
+                var parent = channelJson
+                    .GetPropertyOrNull("parent_id")
+                    ?.GetNonWhiteSpaceStringOrNull()
+                    ?.Pipe(Snowflake.Parse)
+                    .Pipe(parentsById.GetValueOrDefault);
 
+                yield return Channel.Parse(channelJson, parent, position);
                 position++;
+            }
+        }
+    }
 
-                yield return channel;
+    public async IAsyncEnumerable<Channel> GetGuildThreadsAsync(
+        Snowflake guildId,
+        bool includeArchived = false,
+        Snowflake? before = null,
+        Snowflake? after = null,
+        [EnumeratorCancellation] CancellationToken cancellationToken = default
+    )
+    {
+        if (guildId == Guild.DirectMessages.Id)
+            yield break;
+
+        var tokenKind = _resolvedTokenKind ??= await GetTokenKindAsync(cancellationToken);
+
+        var channels = (await GetGuildChannelsAsync(guildId, cancellationToken))
+            // Categories cannot have threads
+            .Where(c => !c.IsCategory)
+            // Voice channels cannot have threads
+            .Where(c => !c.IsVoice)
+            // Empty channels cannot have threads
+            .Where(c => !c.IsEmpty)
+            // If the 'before' boundary is specified, skip channels that don't have messages
+            // for that range, because thread-start event should always be accompanied by a message.
+            // Note that we don't perform a similar check for the 'after' boundary, because
+            // threads may have messages in range, even if the parent channel doesn't.
+            .Where(c => before is null || c.MayHaveMessagesBefore(before.Value))
+            .ToArray();
+
+        // User accounts can only fetch threads using the search endpoint
+        if (tokenKind == TokenKind.User)
+        {
+            // Active threads
+            foreach (var channel in channels)
+            {
+                var currentOffset = 0;
+                while (true)
+                {
+                    var url = new UrlBuilder()
+                        .SetPath($"channels/{channel.Id}/threads/search")
+                        .SetQueryParameter("sort_by", "last_message_time")
+                        .SetQueryParameter("sort_order", "desc")
+                        .SetQueryParameter("archived", "false")
+                        .SetQueryParameter("offset", currentOffset.ToString())
+                        .Build();
+
+                    // Can be null on channels that the user cannot access or channels without threads
+                    var response = await TryGetJsonResponseAsync(url, cancellationToken);
+                    if (response is null)
+                        break;
+
+                    var breakOuter = false;
+
+                    foreach (
+                        var threadJson in response.Value.GetProperty("threads").EnumerateArray()
+                    )
+                    {
+                        var thread = Channel.Parse(threadJson, channel);
+
+                        // If the 'after' boundary is specified, we can break early,
+                        // because threads are sorted by last message time.
+                        if (after is not null && !thread.MayHaveMessagesAfter(after.Value))
+                        {
+                            breakOuter = true;
+                            break;
+                        }
+
+                        yield return thread;
+                        currentOffset++;
+                    }
+
+                    if (breakOuter)
+                        break;
+
+                    if (!response.Value.GetProperty("has_more").GetBoolean())
+                        break;
+                }
+            }
+
+            // Archived threads
+            if (includeArchived)
+            {
+                foreach (var channel in channels)
+                {
+                    var currentOffset = 0;
+                    while (true)
+                    {
+                        var url = new UrlBuilder()
+                            .SetPath($"channels/{channel.Id}/threads/search")
+                            .SetQueryParameter("sort_by", "last_message_time")
+                            .SetQueryParameter("sort_order", "desc")
+                            .SetQueryParameter("archived", "true")
+                            .SetQueryParameter("offset", currentOffset.ToString())
+                            .Build();
+
+                        // Can be null on channels that the user cannot access or channels without threads
+                        var response = await TryGetJsonResponseAsync(url, cancellationToken);
+                        if (response is null)
+                            break;
+
+                        var breakOuter = false;
+
+                        foreach (
+                            var threadJson in response.Value.GetProperty("threads").EnumerateArray()
+                        )
+                        {
+                            var thread = Channel.Parse(threadJson, channel);
+
+                            // If the 'after' boundary is specified, we can break early,
+                            // because threads are sorted by last message time.
+                            if (after is not null && !thread.MayHaveMessagesAfter(after.Value))
+                            {
+                                breakOuter = true;
+                                break;
+                            }
+
+                            yield return thread;
+                            currentOffset++;
+                        }
+
+                        if (breakOuter)
+                            break;
+
+                        if (!response.Value.GetProperty("has_more").GetBoolean())
+                            break;
+                    }
+                }
+            }
+        }
+        // Bot accounts can only fetch threads using the threads endpoint
+        else
+        {
+            // Active threads
+            {
+                var parentsById = channels.ToDictionary(c => c.Id);
+
+                var response = await GetJsonResponseAsync(
+                    $"guilds/{guildId}/threads/active",
+                    cancellationToken
+                );
+
+                foreach (var threadJson in response.GetProperty("threads").EnumerateArray())
+                {
+                    var parent = threadJson
+                        .GetPropertyOrNull("parent_id")
+                        ?.GetNonWhiteSpaceStringOrNull()
+                        ?.Pipe(Snowflake.Parse)
+                        .Pipe(parentsById.GetValueOrDefault);
+
+                    yield return Channel.Parse(threadJson, parent);
+                }
+            }
+
+            // Archived threads
+            if (includeArchived)
+            {
+                foreach (var channel in channels)
+                {
+                    // Public archived threads
+                    {
+                        // Can be null on certain channels
+                        var response = await TryGetJsonResponseAsync(
+                            $"channels/{channel.Id}/threads/archived/public",
+                            cancellationToken
+                        );
+
+                        if (response is null)
+                            continue;
+
+                        foreach (
+                            var threadJson in response.Value.GetProperty("threads").EnumerateArray()
+                        )
+                            yield return Channel.Parse(threadJson, channel);
+                    }
+
+                    // Private archived threads
+                    {
+                        // Can be null on certain channels
+                        var response = await TryGetJsonResponseAsync(
+                            $"channels/{channel.Id}/threads/archived/private",
+                            cancellationToken
+                        );
+
+                        if (response is null)
+                            continue;
+
+                        foreach (
+                            var threadJson in response.Value.GetProperty("threads").EnumerateArray()
+                        )
+                            yield return Channel.Parse(threadJson, channel);
+                    }
+                }
             }
         }
     }
 
     public async IAsyncEnumerable<Role> GetGuildRolesAsync(
         Snowflake guildId,
-        [EnumeratorCancellation] CancellationToken cancellationToken = default)
+        [EnumeratorCancellation] CancellationToken cancellationToken = default
+    )
     {
         if (guildId == Guild.DirectMessages.Id)
             yield break;
 
         var response = await GetJsonResponseAsync($"guilds/{guildId}/roles", cancellationToken);
-
         foreach (var roleJson in response.EnumerateArray())
             yield return Role.Parse(roleJson);
     }
@@ -254,59 +484,62 @@ public class DiscordClient
     public async ValueTask<Member?> TryGetGuildMemberAsync(
         Snowflake guildId,
         Snowflake memberId,
-        CancellationToken cancellationToken = default)
+        CancellationToken cancellationToken = default
+    )
     {
         if (guildId == Guild.DirectMessages.Id)
             return null;
 
-        var response = await TryGetJsonResponseAsync($"guilds/{guildId}/members/{memberId}", cancellationToken);
+        var response = await TryGetJsonResponseAsync(
+            $"guilds/{guildId}/members/{memberId}",
+            cancellationToken
+        );
         return response?.Pipe(j => Member.Parse(j, guildId));
     }
 
-    public async ValueTask<Invite?> TryGetGuildInviteAsync(
+    public async ValueTask<Invite?> TryGetInviteAsync(
         string code,
-        CancellationToken cancellationToken = default)
+        CancellationToken cancellationToken = default
+    )
     {
         var response = await TryGetJsonResponseAsync($"invites/{code}", cancellationToken);
         return response?.Pipe(Invite.Parse);
     }
 
-    public async ValueTask<ChannelCategory> GetChannelCategoryAsync(
-        Snowflake channelId,
-        CancellationToken cancellationToken = default)
-    {
-        try
-        {
-            var response = await GetJsonResponseAsync($"channels/{channelId}", cancellationToken);
-            return ChannelCategory.Parse(response);
-        }
-        // In some cases, the Discord API returns an empty body when requesting channel category.
-        // Instead, we use an empty channel category as a fallback.
-        catch (DiscordChatExporterException)
-        {
-            return new ChannelCategory(channelId, "Unknown Category", 0);
-        }
-    }
-
     public async ValueTask<Channel> GetChannelAsync(
         Snowflake channelId,
-        CancellationToken cancellationToken = default)
+        CancellationToken cancellationToken = default
+    )
     {
         var response = await GetJsonResponseAsync($"channels/{channelId}", cancellationToken);
 
-        var parentId = response.GetPropertyOrNull("parent_id")?.GetNonWhiteSpaceStringOrNull()?.Pipe(Snowflake.Parse);
+        var parentId = response
+            .GetPropertyOrNull("parent_id")
+            ?.GetNonWhiteSpaceStringOrNull()
+            ?.Pipe(Snowflake.Parse);
 
-        var category = parentId is not null
-            ? await GetChannelCategoryAsync(parentId.Value, cancellationToken)
-            : null;
+        try
+        {
+            var parent = parentId is not null
+                ? await GetChannelAsync(parentId.Value, cancellationToken)
+                : null;
 
-        return Channel.Parse(response, category);
+            return Channel.Parse(response, parent);
+        }
+        // It's possible for the parent channel to be inaccessible, despite the
+        // child channel being accessible.
+        // https://github.com/Tyrrrz/DiscordChatExporter/issues/1108
+        catch (DiscordChatExporterException)
+        {
+            return Channel.Parse(response);
+        }
     }
 
     private async ValueTask<Message?> TryGetLastMessageAsync(
         Snowflake channelId,
         Snowflake? before = null,
-        CancellationToken cancellationToken = default)
+        CancellationToken cancellationToken = default
+    )
     {
         var url = new UrlBuilder()
             .SetPath($"channels/{channelId}/messages")
@@ -323,20 +556,21 @@ public class DiscordClient
         Snowflake? after = null,
         Snowflake? before = null,
         IProgress<Percentage>? progress = null,
-        [EnumeratorCancellation] CancellationToken cancellationToken = default)
+        [EnumeratorCancellation] CancellationToken cancellationToken = default
+    )
     {
-        // Get the last message in the specified range.
-        // This snapshots the boundaries, which means that messages posted after the export started
-        // will not appear in the output.
-        // Additionally, it provides the date of the last message, which is used to calculate progress.
+        // Get the last message in the specified range, so we can later calculate the
+        // progress based on the difference between message timestamps.
+        // This also snapshots the boundaries, which means that messages posted after
+        // the export started will not appear in the output.
         var lastMessage = await TryGetLastMessageAsync(channelId, before, cancellationToken);
         if (lastMessage is null || lastMessage.Timestamp < after?.ToDate())
             yield break;
 
-        // Keep track of first message in range in order to calculate progress
+        // Keep track of the first message in range in order to calculate the progress
         var firstMessage = default(Message);
-        var currentAfter = after ?? Snowflake.Zero;
 
+        var currentAfter = after ?? Snowflake.Zero;
         while (true)
         {
             var url = new UrlBuilder()
@@ -350,7 +584,8 @@ public class DiscordClient
             var messages = response
                 .EnumerateArray()
                 .Select(Message.Parse)
-                .Reverse() // reverse because messages appear newest first
+                // Messages are returned from newest to oldest, so we need to reverse them
+                .Reverse()
                 .ToArray();
 
             // Break if there are no messages (can happen if messages are deleted during execution)
@@ -361,23 +596,25 @@ public class DiscordClient
             {
                 firstMessage ??= message;
 
-                // Ensure messages are in range (take into account that last message could have been deleted)
+                // Ensure that the messages are in range
                 if (message.Timestamp > lastMessage.Timestamp)
                     yield break;
 
-                // Report progress based on the duration of exported messages divided by total
+                // Report progress based on timestamps
                 if (progress is not null)
                 {
                     var exportedDuration = (message.Timestamp - firstMessage.Timestamp).Duration();
                     var totalDuration = (lastMessage.Timestamp - firstMessage.Timestamp).Duration();
 
-                    progress.Report(Percentage.FromFraction(
-                        // Avoid division by zero if all messages have the exact same timestamp
-                        // (which may be the case if there's only one message in the channel)
-                        totalDuration > TimeSpan.Zero
-                            ? exportedDuration / totalDuration
-                            : 1
-                    ));
+                    progress.Report(
+                        Percentage.FromFraction(
+                            // Avoid division by zero if all messages have the exact same timestamp
+                            // (which happens when there's only one message in the channel)
+                            totalDuration > TimeSpan.Zero
+                                ? exportedDuration / totalDuration
+                                : 1
+                        )
+                    );
                 }
 
                 yield return message;
@@ -385,4 +622,47 @@ public class DiscordClient
             }
         }
     }
-}
+
+    public async IAsyncEnumerable<User> GetMessageReactionsAsync(
+        Snowflake channelId,
+        Snowflake messageId,
+        Emoji emoji,
+        [EnumeratorCancellation] CancellationToken cancellationToken = default
+    )
+    {
+        var reactionName = emoji.Id is not null
+            // Custom emoji
+            ? emoji.Name + ':' + emoji.Id
+            // Standard emoji
+            : emoji.Name;
+
+        var currentAfter = Snowflake.Zero;
+        while (true)
+        {
+            var url = new UrlBuilder()
+                .SetPath(
+                    $"channels/{channelId}/messages/{messageId}/reactions/{Uri.EscapeDataString(reactionName)}"
+                )
+                .SetQueryParameter("limit", "100")
+                .SetQueryParameter("after", currentAfter.ToString())
+                .Build();
+
+            var response = await GetJsonResponseAsync(url, cancellationToken);
+
+            var count = 0;
+            foreach (var userJson in response.EnumerateArray())
+            {
+                var user = User.Parse(userJson);
+                yield return user;
+
+                currentAfter = user.Id;
+                count++;
+            }
+
+            // Each batch can contain up to 100 users.
+            // If we got fewer, then it's definitely the last batch.
+            if (count < 100)
+                yield break;
+        }
+    }
+}

DiscordChatExporter.Core/Discord/Snowflake.cs

@@ -6,9 +6,10 @@ namespace DiscordChatExporter.Core.Discord;
 
 public readonly partial record struct Snowflake(ulong Value)
 {
-    public DateTimeOffset ToDate() => DateTimeOffset.FromUnixTimeMilliseconds(
-        (long)((Value >> 22) + 1420070400000UL)
-    ).ToLocalTime();
+    public DateTimeOffset ToDate() =>
+        DateTimeOffset
+            .FromUnixTimeMilliseconds((long)((Value >> 22) + 1420070400000UL))
+            .ToLocalTime();
 
     [ExcludeFromCodeCoverage]
     public override string ToString() => Value.ToString(CultureInfo.InvariantCulture);
@@ -18,9 +19,8 @@ public partial record struct Snowflake
 {
     public static Snowflake Zero { get; } = new(0);
 
-    public static Snowflake FromDate(DateTimeOffset instant) => new(
-        ((ulong)instant.ToUnixTimeMilliseconds() - 1420070400000UL) << 22
-    );
+    public static Snowflake FromDate(DateTimeOffset instant) =>
+        new(((ulong)instant.ToUnixTimeMilliseconds() - 1420070400000UL) << 22);
 
     public static Snowflake? TryParse(string? str, IFormatProvider? formatProvider = null)
     {
@@ -29,15 +29,11 @@ public partial record struct Snowflake
 
         // As number
         if (ulong.TryParse(str, NumberStyles.None, formatProvider, out var value))
-        {
             return new Snowflake(value);
-        }
 
         // As date
         if (DateTimeOffset.TryParse(str, formatProvider, DateTimeStyles.None, out var instant))
-        {
             return FromDate(instant);
-        }
 
         return null;
     }
@@ -59,4 +55,8 @@ public partial record struct Snowflake : IComparable<Snowflake>, IComparable
 
         return Value.CompareTo(other.Value);
     }
-}
+
+    public static bool operator >(Snowflake left, Snowflake right) => left.CompareTo(right) > 0;
+
+    public static bool operator <(Snowflake left, Snowflake right) => left.CompareTo(right) < 0;
+}

DiscordChatExporter.Core/Discord/TokenKind.cs

@@ -4,4 +4,4 @@ public enum TokenKind
 {
     User,
     Bot
-}
+}

DiscordChatExporter.Core/DiscordChatExporter.Core.csproj

@@ -1,17 +1,15 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
-  <PropertyGroup>
-    <EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
-  </PropertyGroup>
-
   <ItemGroup>
-    <PackageReference Include="AsyncKeyedLock" Version="6.1.1" />
-    <PackageReference Include="Gress" Version="2.0.1" />
+    <PackageReference Include="AsyncKeyedLock" Version="6.2.1" />
+    <PackageReference Include="CSharpier.MsBuild" Version="0.25.0" PrivateAssets="all" />
+    <PackageReference Include="Gress" Version="2.1.1" />
     <PackageReference Include="JsonExtensions" Version="1.2.0" />
-    <PackageReference Include="Polly" Version="7.2.3" />
-    <PackageReference Include="RazorBlade" Version="0.4.2" />
+    <PackageReference Include="Polly" Version="7.2.4" />
+    <PackageReference Include="RazorBlade" Version="0.4.3" />
     <PackageReference Include="Superpower" Version="3.0.0" />
-    <PackageReference Include="WebMarkupMin.Core" Version="2.13.8" />
+    <PackageReference Include="WebMarkupMin.Core" Version="2.14.0" />
+    <PackageReference Include="YoutubeExplode" Version="6.3.1" />
   </ItemGroup>
 
 </Project>

DiscordChatExporter.Core/Exceptions/DiscordChatExporterException.cs

@@ -1,9 +1,8 @@
 using System;
-using System.Net.Http;
 
 namespace DiscordChatExporter.Core.Exceptions;
 
-public partial class DiscordChatExporterException : Exception
+public class DiscordChatExporterException : Exception
 {
     public bool IsFatal { get; }
 
@@ -13,32 +12,3 @@ public partial class DiscordChatExporterException : Exception
         IsFatal = isFatal;
     }
 }
-
-public partial class DiscordChatExporterException
-{
-    internal static DiscordChatExporterException FailedHttpRequest(HttpResponseMessage response)
-    {
-        var message = $@"
-Failed to perform an HTTP request.
-
-[Request]
-{response.RequestMessage}
-
-[Response]
-{response}";
-
-        return new DiscordChatExporterException(message.Trim(), true);
-    }
-
-    internal static DiscordChatExporterException Unauthorized() =>
-        new("Authentication token is invalid.", true);
-
-    internal static DiscordChatExporterException Forbidden() =>
-        new("Access is forbidden.");
-
-    internal static DiscordChatExporterException NotFound(string resourceId) =>
-        new($"Requested resource ({resourceId}) does not exist.");
-
-    internal static DiscordChatExporterException ChannelIsEmpty() =>
-        new("Channel is empty or contains no messages for the specified period.");
-}

DiscordChatExporter.Core/Exporting/ChannelExporter.cs

@@ -2,6 +2,7 @@
 using System.Threading;
 using System.Threading.Tasks;
 using DiscordChatExporter.Core.Discord;
+using DiscordChatExporter.Core.Discord.Data;
 using DiscordChatExporter.Core.Exceptions;
 using Gress;
 
@@ -16,25 +17,55 @@ public class ChannelExporter
     public async ValueTask ExportChannelAsync(
         ExportRequest request,
         IProgress<Percentage>? progress = null,
-        CancellationToken cancellationToken = default)
+        CancellationToken cancellationToken = default
+    )
     {
+        // Forum channels don't have messages, they are just a list of threads
+        if (request.Channel.Kind == ChannelKind.GuildForum)
+            throw new DiscordChatExporterException("Channel is a forum.");
+
+        // Check if the channel is empty
+        if (request.Channel.IsEmpty)
+            throw new DiscordChatExporterException("Channel does not contain any messages.");
+
+        // Check if the 'after' boundary is valid
+        if (request.After is not null && !request.Channel.MayHaveMessagesAfter(request.After.Value))
+        {
+            throw new DiscordChatExporterException(
+                "Channel does not contain any messages within the specified period."
+            );
+        }
+
+        // Check if the 'before' boundary is valid
+        if (
+            request.Before is not null
+            && !request.Channel.MayHaveMessagesBefore(request.Before.Value)
+        )
+        {
+            throw new DiscordChatExporterException(
+                "Channel does not contain any messages within the specified period."
+            );
+        }
+
         // Build context
         var context = new ExportContext(_discord, request);
         await context.PopulateChannelsAndRolesAsync(cancellationToken);
 
         // Export messages
         await using var messageExporter = new MessageExporter(context);
-
-        await foreach (var message in _discord.GetMessagesAsync(
-                           request.Channel.Id,
-                           request.After,
-                           request.Before,
-                           progress,
-                           cancellationToken))
+        await foreach (
+            var message in _discord.GetMessagesAsync(
+                request.Channel.Id,
+                request.After,
+                request.Before,
+                progress,
+                cancellationToken
+            )
+        )
         {
             // Resolve members for referenced users
             foreach (var user in message.GetReferencedUsers())
-                await context.PopulateMemberAsync(user.Id, cancellationToken);
+                await context.PopulateMemberAsync(user, cancellationToken);
 
             // Export the message
             if (request.MessageFilter.IsMatch(message))
@@ -43,6 +74,10 @@ public class ChannelExporter
 
         // Throw if no messages were exported
         if (messageExporter.MessagesExported <= 0)
-            throw DiscordChatExporterException.ChannelIsEmpty();
+        {
+            throw new DiscordChatExporterException(
+                "Channel does not contain any matching messages within the specified period."
+            );
+        }
     }
-}
+}

DiscordChatExporter.Core/Exporting/CsvMessageWriter.cs

@@ -20,17 +20,20 @@ internal partial class CsvMessageWriter : MessageWriter
 
     private async ValueTask<string> FormatMarkdownAsync(
         string markdown,
-        CancellationToken cancellationToken = default) =>
+        CancellationToken cancellationToken = default
+    ) =>
         Context.Request.ShouldFormatMarkdown
             ? await PlainTextMarkdownVisitor.FormatAsync(Context, markdown, cancellationToken)
             : markdown;
 
-    public override async ValueTask WritePreambleAsync(CancellationToken cancellationToken = default) =>
-        await _writer.WriteLineAsync("AuthorID,Author,Date,Content,Attachments,Reactions");
+    public override async ValueTask WritePreambleAsync(
+        CancellationToken cancellationToken = default
+    ) => await _writer.WriteLineAsync("AuthorID,Author,Date,Content,Attachments,Reactions");
 
     private async ValueTask WriteAttachmentsAsync(
         IReadOnlyList<Attachment> attachments,
-        CancellationToken cancellationToken = default)
+        CancellationToken cancellationToken = default
+    )
     {
         var buffer = new StringBuilder();
 
@@ -48,7 +51,8 @@ internal partial class CsvMessageWriter : MessageWriter
 
     private async ValueTask WriteReactionsAsync(
         IReadOnlyList<Reaction> reactions,
-        CancellationToken cancellationToken = default)
+        CancellationToken cancellationToken = default
+    )
     {
         var buffer = new StringBuilder();
 
@@ -70,7 +74,8 @@ internal partial class CsvMessageWriter : MessageWriter
 
     public override async ValueTask WriteMessageAsync(
         Message message,
-        CancellationToken cancellationToken = default)
+        CancellationToken cancellationToken = default
+    )
     {
         await base.WriteMessageAsync(message, cancellationToken);
 
@@ -87,13 +92,15 @@ internal partial class CsvMessageWriter : MessageWriter
         await _writer.WriteAsync(',');
 
         // Message content
-        if (message.Kind.IsSystemNotification())
+        if (message.IsSystemNotification)
         {
             await _writer.WriteAsync(CsvEncode(message.GetFallbackContent()));
         }
         else
         {
-            await _writer.WriteAsync(CsvEncode(await FormatMarkdownAsync(message.Content, cancellationToken)));
+            await _writer.WriteAsync(
+                CsvEncode(await FormatMarkdownAsync(message.Content, cancellationToken))
+            );
         }
 
         await _writer.WriteAsync(',');
@@ -123,4 +130,4 @@ internal partial class CsvMessageWriter
         value = value.Replace("\"", "\"\"");
         return $"\"{value}\"";
     }
-}
+}

DiscordChatExporter.Core/Exporting/ExportAssetDownloader.cs

@@ -15,17 +15,18 @@ namespace DiscordChatExporter.Core.Exporting;
 
 internal partial class ExportAssetDownloader
 {
-    private static readonly AsyncKeyedLocker<string> Locker = new(o =>
-    {
-        o.PoolSize = 20;
-        o.PoolInitialFill = 1;
-    });
+    private static readonly AsyncKeyedLocker<string> Locker =
+        new(o =>
+        {
+            o.PoolSize = 20;
+            o.PoolInitialFill = 1;
+        });
 
     private readonly string _workingDirPath;
     private readonly bool _reuse;
 
     // File paths of the previously downloaded assets
-    private readonly Dictionary<string, string> _pathCache = new(StringComparer.Ordinal);
+    private readonly Dictionary<string, string> _previousPathsByUrl = new(StringComparer.Ordinal);
 
     public ExportAssetDownloader(string workingDirPath, bool reuse)
     {
@@ -33,72 +34,82 @@ internal partial class ExportAssetDownloader
         _reuse = reuse;
     }
 
-    public async ValueTask<string> DownloadAsync(string url, CancellationToken cancellationToken = default)
+    public async ValueTask<string> DownloadAsync(
+        string url,
+        CancellationToken cancellationToken = default
+    )
     {
         var fileName = GetFileNameFromUrl(url);
         var filePath = Path.Combine(_workingDirPath, fileName);
 
-        using (await Locker.LockAsync(filePath, cancellationToken))
+        using var _ = await Locker.LockAsync(filePath, cancellationToken);
+
+        if (_previousPathsByUrl.TryGetValue(url, out var cachedFilePath))
+            return cachedFilePath;
+
+        // Reuse existing files if we're allowed to
+        if (_reuse && File.Exists(filePath))
+            return _previousPathsByUrl[url] = filePath;
+
+        Directory.CreateDirectory(_workingDirPath);
+
+        await Http.ResiliencePolicy.ExecuteAsync(async () =>
         {
-            if (_pathCache.TryGetValue(url, out var cachedFilePath))
-                return cachedFilePath;
+            // Download the file
+            using var response = await Http.Client.GetAsync(url, cancellationToken);
+            await using (var output = File.Create(filePath))
+                await response.Content.CopyToAsync(output, cancellationToken);
 
-            // Reuse existing files if we're allowed to
-            if (_reuse && File.Exists(filePath))
-                return _pathCache[url] = filePath;
-
-            Directory.CreateDirectory(_workingDirPath);
-
-            await Http.ResiliencePolicy.ExecuteAsync(async () =>
+            // Try to set the file date according to the last-modified header
+            try
             {
-                // Download the file
-                using var response = await Http.Client.GetAsync(url, cancellationToken);
-                await using (var output = File.Create(filePath))
-                    await response.Content.CopyToAsync(output, cancellationToken);
-
-                // Try to set the file date according to the last-modified header
-                try
-                {
-                    var lastModified = response.Content.Headers.TryGetValue("Last-Modified")?.Pipe(s =>
-                        DateTimeOffset.TryParse(s, CultureInfo.InvariantCulture, DateTimeStyles.None, out var instant)
-                            ? instant
-                            : (DateTimeOffset?)null
+                var lastModified = response.Content.Headers
+                    .TryGetValue("Last-Modified")
+                    ?.Pipe(
+                        s =>
+                            DateTimeOffset.TryParse(
+                                s,
+                                CultureInfo.InvariantCulture,
+                                DateTimeStyles.None,
+                                out var instant
+                            )
+                                ? instant
+                                : (DateTimeOffset?)null
                     );
 
-                    if (lastModified is not null)
-                    {
-                        File.SetCreationTimeUtc(filePath, lastModified.Value.UtcDateTime);
-                        File.SetLastWriteTimeUtc(filePath, lastModified.Value.UtcDateTime);
-                        File.SetLastAccessTimeUtc(filePath, lastModified.Value.UtcDateTime);
-                    }
-                }
-                catch
+                if (lastModified is not null)
                 {
-                    // This can apparently fail for some reason.
-                    // https://github.com/Tyrrrz/DiscordChatExporter/issues/585
-                    // Updating file dates is not a critical task, so we'll just
-                    // ignore exceptions thrown here.
+                    File.SetCreationTimeUtc(filePath, lastModified.Value.UtcDateTime);
+                    File.SetLastWriteTimeUtc(filePath, lastModified.Value.UtcDateTime);
+                    File.SetLastAccessTimeUtc(filePath, lastModified.Value.UtcDateTime);
                 }
-            });
+            }
+            catch
+            {
+                // This can apparently fail for some reason.
+                // Updating the file date is not a critical task, so we'll just ignore exceptions thrown here.
+                // https://github.com/Tyrrrz/DiscordChatExporter/issues/585
+            }
+        });
 
-            return _pathCache[url] = filePath;
-        }
+        return _previousPathsByUrl[url] = filePath;
     }
 }
 
 internal partial class ExportAssetDownloader
 {
-    private static string GetUrlHash(string url) => SHA256
-        .HashData(Encoding.UTF8.GetBytes(url))
-        .ToHex()
-        // 5 chars ought to be enough for anybody
-        .Truncate(5);
+    private static string GetUrlHash(string url) =>
+        SHA256
+            .HashData(Encoding.UTF8.GetBytes(url))
+            .ToHex()
+            // 5 chars ought to be enough for anybody
+            .Truncate(5);
 
     private static string GetFileNameFromUrl(string url)
     {
         var urlHash = GetUrlHash(url);
 
-        // Try to extract file name from URL
+        // Try to extract the file name from URL
         var fileName = Regex.Match(url, @".+/([^?]*)").Groups[1].Value;
 
         // If it's not there, just use the URL hash as the file name
@@ -110,13 +121,15 @@ internal partial class ExportAssetDownloader
         var fileExtension = Path.GetExtension(fileName);
 
         // Probably not a file extension, just a dot in a long file name
-        // https://github.com/Tyrrrz/DiscordChatExporter/issues/708
+        // https://github.com/Tyrrrz/DiscordChatExporter/pull/812
         if (fileExtension.Length > 41)
         {
             fileNameWithoutExtension = fileName;
             fileExtension = "";
         }
 
-        return PathEx.EscapeFileName(fileNameWithoutExtension.Truncate(42) + '-' + urlHash + fileExtension);
+        return PathEx.EscapeFileName(
+            fileNameWithoutExtension.Truncate(42) + '-' + urlHash + fileExtension
+        );
     }
-}
+}

DiscordChatExporter.Core/Exporting/ExportContext.cs

@@ -14,16 +14,16 @@ namespace DiscordChatExporter.Core.Exporting;
 
 internal class ExportContext
 {
-    private readonly Dictionary<Snowflake, Member?> _members = new();
-    private readonly Dictionary<Snowflake, Channel> _channels = new();
-    private readonly Dictionary<Snowflake, Role> _roles = new();
+    private readonly Dictionary<Snowflake, Member?> _membersById = new();
+    private readonly Dictionary<Snowflake, Channel> _channelsById = new();
+    private readonly Dictionary<Snowflake, Role> _rolesById = new();
     private readonly ExportAssetDownloader _assetDownloader;
 
     public DiscordClient Discord { get; }
+
     public ExportRequest Request { get; }
 
-    public ExportContext(DiscordClient discord,
-        ExportRequest request)
+    public ExportContext(DiscordClient discord, ExportRequest request)
     {
         Discord = discord;
         Request = request;
@@ -34,58 +34,86 @@ internal class ExportContext
         );
     }
 
-    public async ValueTask PopulateChannelsAndRolesAsync(CancellationToken cancellationToken = default)
+    public DateTimeOffset NormalizeDate(DateTimeOffset instant) =>
+        Request.IsUtcNormalizationEnabled ? instant.ToUniversalTime() : instant.ToLocalTime();
+
+    public string FormatDate(DateTimeOffset instant, string format = "g") =>
+        NormalizeDate(instant).ToString(format, Request.CultureInfo);
+
+    public async ValueTask PopulateChannelsAndRolesAsync(
+        CancellationToken cancellationToken = default
+    )
     {
-        await foreach (var channel in Discord.GetGuildChannelsAsync(Request.Guild.Id, cancellationToken))
-            _channels[channel.Id] = channel;
+        await foreach (
+            var channel in Discord.GetGuildChannelsAsync(Request.Guild.Id, cancellationToken)
+        )
+        {
+            _channelsById[channel.Id] = channel;
+        }
 
         await foreach (var role in Discord.GetGuildRolesAsync(Request.Guild.Id, cancellationToken))
-            _roles[role.Id] = role;
+        {
+            _rolesById[role.Id] = role;
+        }
     }
 
-    // Because members are not pulled in bulk, we need to populate them on demand
-    public async ValueTask PopulateMemberAsync(Snowflake id, CancellationToken cancellationToken = default)
+    // Because members cannot be pulled in bulk, we need to populate them on demand
+    private async ValueTask PopulateMemberAsync(
+        Snowflake id,
+        User? fallbackUser,
+        CancellationToken cancellationToken = default
+    )
     {
-        if (_members.ContainsKey(id))
+        if (_membersById.ContainsKey(id))
             return;
 
         var member = await Discord.TryGetGuildMemberAsync(Request.Guild.Id, id, cancellationToken);
 
+        // User may have left the guild since they were mentioned.
+        // Create a dummy member object based on the user info.
+        if (member is null)
+        {
+            var user = fallbackUser ?? await Discord.TryGetUserAsync(id, cancellationToken);
+
+            // User may have been deleted since they were mentioned
+            if (user is not null)
+                member = Member.CreateFallback(user);
+        }
+
         // Store the result even if it's null, to avoid re-fetching non-existing members
-        _members[id] = member;
+        _membersById[id] = member;
     }
 
-    public string FormatDate(DateTimeOffset instant) => Request.DateFormat switch
-    {
-        "unix" => instant.ToUnixTimeSeconds().ToString(),
-        "unixms" => instant.ToUnixTimeMilliseconds().ToString(),
-        var format => instant.ToLocalString(format)
-    };
+    public async ValueTask PopulateMemberAsync(
+        Snowflake id,
+        CancellationToken cancellationToken = default
+    ) => await PopulateMemberAsync(id, null, cancellationToken);
 
-    public Member? TryGetMember(Snowflake id) => _members.GetValueOrDefault(id);
+    public async ValueTask PopulateMemberAsync(
+        User user,
+        CancellationToken cancellationToken = default
+    ) => await PopulateMemberAsync(user.Id, user, cancellationToken);
 
-    public Channel? TryGetChannel(Snowflake id) => _channels.GetValueOrDefault(id);
+    public Member? TryGetMember(Snowflake id) => _membersById.GetValueOrDefault(id);
 
-    public Role? TryGetRole(Snowflake id) => _roles.GetValueOrDefault(id);
+    public Channel? TryGetChannel(Snowflake id) => _channelsById.GetValueOrDefault(id);
 
-    public Color? TryGetUserColor(Snowflake id)
-    {
-        var member = TryGetMember(id);
+    public Role? TryGetRole(Snowflake id) => _rolesById.GetValueOrDefault(id);
 
-        var memberRoles = member?
-            .RoleIds
+    public IReadOnlyList<Role> GetUserRoles(Snowflake id) =>
+        TryGetMember(id)?.RoleIds
             .Select(TryGetRole)
             .WhereNotNull()
-            .ToArray();
-
-        return memberRoles?
-            .Where(r => r.Color is not null)
             .OrderByDescending(r => r.Position)
-            .Select(r => r.Color)
-            .FirstOrDefault();
-    }
+            .ToArray() ?? Array.Empty<Role>();
 
-    public async ValueTask<string> ResolveAssetUrlAsync(string url, CancellationToken cancellationToken = default)
+    public Color? TryGetUserColor(Snowflake id) =>
+        GetUserRoles(id).Where(r => r.Color is not null).Select(r => r.Color).FirstOrDefault();
+
+    public async ValueTask<string> ResolveAssetUrlAsync(
+        string url,
+        CancellationToken cancellationToken = default
+    )
     {
         if (!Request.ShouldDownloadAssets)
             return url;
@@ -96,10 +124,16 @@ internal class ExportContext
             var relativeFilePath = Path.GetRelativePath(Request.OutputDirPath, filePath);
 
             // Prefer relative paths so that the output files can be copied around without breaking references.
-            // If the assets path is outside of the export directory, use the absolute path instead.
+            // If the asset directory is outside of the export directory, use an absolute path instead.
             var optimalFilePath =
-                relativeFilePath.StartsWith(".." + Path.DirectorySeparatorChar, StringComparison.Ordinal) ||
-                relativeFilePath.StartsWith(".." + Path.AltDirectorySeparatorChar, StringComparison.Ordinal)
+                relativeFilePath.StartsWith(
+                    ".." + Path.DirectorySeparatorChar,
+                    StringComparison.Ordinal
+                )
+                || relativeFilePath.StartsWith(
+                    ".." + Path.AltDirectorySeparatorChar,
+                    StringComparison.Ordinal
+                )
                     ? filePath
                     : relativeFilePath;
 
@@ -117,9 +151,9 @@ internal class ExportContext
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/372
         catch (Exception ex) when (ex is HttpRequestException or OperationCanceledException)
         {
-            // TODO: add logging so we can be more liberal with catching exceptions
-            // We don't want this to crash the exporting process in case of failure
+            // We don't want this to crash the exporting process in case of failure.
+            // TODO: add logging so we can be more liberal with catching exceptions.
             return url;
         }
     }
-}
+}

DiscordChatExporter.Core/Exporting/ExportFormat.cs

@@ -13,23 +13,25 @@ public enum ExportFormat
 
 public static class ExportFormatExtensions
 {
-    public static string GetFileExtension(this ExportFormat format) => format switch
-    {
-        ExportFormat.PlainText => "txt",
-        ExportFormat.HtmlDark => "html",
-        ExportFormat.HtmlLight => "html",
-        ExportFormat.Csv => "csv",
-        ExportFormat.Json => "json",
-        _ => throw new ArgumentOutOfRangeException(nameof(format))
-    };
+    public static string GetFileExtension(this ExportFormat format) =>
+        format switch
+        {
+            ExportFormat.PlainText => "txt",
+            ExportFormat.HtmlDark => "html",
+            ExportFormat.HtmlLight => "html",
+            ExportFormat.Csv => "csv",
+            ExportFormat.Json => "json",
+            _ => throw new ArgumentOutOfRangeException(nameof(format))
+        };
 
-    public static string GetDisplayName(this ExportFormat format) => format switch
-    {
-        ExportFormat.PlainText => "TXT",
-        ExportFormat.HtmlDark => "HTML (Dark)",
-        ExportFormat.HtmlLight => "HTML (Light)",
-        ExportFormat.Csv => "CSV",
-        ExportFormat.Json => "JSON",
-        _ => throw new ArgumentOutOfRangeException(nameof(format))
-    };
-}
+    public static string GetDisplayName(this ExportFormat format) =>
+        format switch
+        {
+            ExportFormat.PlainText => "TXT",
+            ExportFormat.HtmlDark => "HTML (Dark)",
+            ExportFormat.HtmlLight => "HTML (Light)",
+            ExportFormat.Csv => "CSV",
+            ExportFormat.Json => "JSON",
+            _ => throw new ArgumentOutOfRangeException(nameof(format))
+        };
+}

DiscordChatExporter.Core/Exporting/ExportRequest.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Globalization;
 using System.IO;
 using System.Text;
 using System.Text.RegularExpressions;
@@ -38,7 +39,11 @@ public partial class ExportRequest
 
     public bool ShouldReuseAssets { get; }
 
-    public string DateFormat { get; }
+    public string Locale { get; }
+
+    public CultureInfo CultureInfo { get; }
+
+    public bool IsUtcNormalizationEnabled { get; }
 
     public ExportRequest(
         Guild guild,
@@ -53,7 +58,9 @@ public partial class ExportRequest
         bool shouldFormatMarkdown,
         bool shouldDownloadAssets,
         bool shouldReuseAssets,
-        string dateFormat)
+        string locale,
+        bool isUtcNormalizationEnabled
+    )
     {
         Guild = guild;
         Channel = channel;
@@ -65,28 +72,18 @@ public partial class ExportRequest
         ShouldFormatMarkdown = shouldFormatMarkdown;
         ShouldDownloadAssets = shouldDownloadAssets;
         ShouldReuseAssets = shouldReuseAssets;
-        DateFormat = dateFormat;
+        Locale = locale;
+        IsUtcNormalizationEnabled = isUtcNormalizationEnabled;
 
-        OutputFilePath = GetOutputBaseFilePath(
-            Guild,
-            Channel,
-            outputPath,
-            Format,
-            After,
-            Before
-        );
+        OutputFilePath = GetOutputBaseFilePath(Guild, Channel, outputPath, Format, After, Before);
 
         OutputDirPath = Path.GetDirectoryName(OutputFilePath)!;
 
         AssetsDirPath = !string.IsNullOrWhiteSpace(assetsDirPath)
-            ? FormatPath(
-                assetsDirPath,
-                Guild,
-                Channel,
-                After,
-                Before
-            )
+            ? FormatPath(assetsDirPath, Guild, Channel, After, Before)
             : $"{OutputFilePath}_Files{Path.DirectorySeparatorChar}";
+
+        CultureInfo = CultureInfo.GetCultureInfo(Locale);
     }
 }
 
@@ -97,12 +94,26 @@ public partial class ExportRequest
         Channel channel,
         ExportFormat format,
         Snowflake? after = null,
-        Snowflake? before = null)
+        Snowflake? before = null
+    )
     {
         var buffer = new StringBuilder();
 
-        // Guild and channel names
-        buffer.Append($"{guild.Name} - {channel.Category.Name} - {channel.Name} [{channel.Id}]");
+        // Guild name
+        buffer.Append(guild.Name);
+
+        // Parent name
+        if (channel.Parent is not null)
+            buffer.Append(" - ").Append(channel.Parent.Name);
+
+        // Channel name and ID
+        buffer
+            .Append(" - ")
+            .Append(channel.Name)
+            .Append(' ')
+            .Append('[')
+            .Append(channel.Id)
+            .Append(']');
 
         // Date range
         if (after is not null || before is not null)
@@ -112,7 +123,9 @@ public partial class ExportRequest
             // Both 'after' and 'before' are set
             if (after is not null && before is not null)
             {
-                buffer.Append($"{after.Value.ToDate():yyyy-MM-dd} to {before.Value.ToDate():yyyy-MM-dd}");
+                buffer.Append(
+                    $"{after.Value.ToDate():yyyy-MM-dd} to {before.Value.ToDate():yyyy-MM-dd}"
+                );
             }
             // Only 'after' is set
             else if (after is not null)
@@ -139,29 +152,46 @@ public partial class ExportRequest
         Guild guild,
         Channel channel,
         Snowflake? after,
-        Snowflake? before)
-    {
-        return Regex.Replace(
+        Snowflake? before
+    ) =>
+        Regex.Replace(
             path,
             "%.",
-            m => PathEx.EscapeFileName(m.Value switch
-            {
-                "%g" => guild.Id.ToString(),
-                "%G" => guild.Name,
-                "%t" => channel.Category.Id.ToString(),
-                "%T" => channel.Category.Name,
-                "%c" => channel.Id.ToString(),
-                "%C" => channel.Name,
-                "%p" => channel.Position?.ToString() ?? "0",
-                "%P" => channel.Category.Position?.ToString() ?? "0",
-                "%a" => after?.ToDate().ToString("yyyy-MM-dd") ?? "",
-                "%b" => before?.ToDate().ToString("yyyy-MM-dd") ?? "",
-                "%d" => DateTimeOffset.Now.ToString("yyyy-MM-dd"),
-                "%%" => "%",
-                _ => m.Value
-            })
+            m =>
+                PathEx.EscapeFileName(
+                    m.Value switch
+                    {
+                        "%g" => guild.Id.ToString(),
+                        "%G" => guild.Name,
+
+                        "%t" => channel.Parent?.Id.ToString() ?? "",
+                        "%T" => channel.Parent?.Name ?? "",
+
+                        "%c" => channel.Id.ToString(),
+                        "%C" => channel.Name,
+
+                        "%p" => channel.Position?.ToString(CultureInfo.InvariantCulture) ?? "0",
+                        "%P"
+                            => channel.Parent?.Position?.ToString(CultureInfo.InvariantCulture)
+                                ?? "0",
+
+                        "%a"
+                            => after?.ToDate().ToString("yyyy-MM-dd", CultureInfo.InvariantCulture)
+                                ?? "",
+                        "%b"
+                            => before?.ToDate().ToString("yyyy-MM-dd", CultureInfo.InvariantCulture)
+                                ?? "",
+                        "%d"
+                            => DateTimeOffset.Now.ToString(
+                                "yyyy-MM-dd",
+                                CultureInfo.InvariantCulture
+                            ),
+
+                        "%%" => "%",
+                        _ => m.Value
+                    }
+                )
         );
-    }
 
     private static string GetOutputBaseFilePath(
         Guild guild,
@@ -169,12 +199,16 @@ public partial class ExportRequest
         string outputPath,
         ExportFormat format,
         Snowflake? after = null,
-        Snowflake? before = null)
+        Snowflake? before = null
+    )
     {
         var actualOutputPath = FormatPath(outputPath, guild, channel, after, before);
 
         // Output is a directory
-        if (Directory.Exists(actualOutputPath) || string.IsNullOrWhiteSpace(Path.GetExtension(actualOutputPath)))
+        if (
+            Directory.Exists(actualOutputPath)
+            || string.IsNullOrWhiteSpace(Path.GetExtension(actualOutputPath))
+        )
         {
             var fileName = GetDefaultOutputFileName(guild, channel, format, after, before);
             return Path.Combine(actualOutputPath, fileName);
@@ -183,4 +217,4 @@ public partial class ExportRequest
         // Output is a file
         return actualOutputPath;
     }
-}
+}

DiscordChatExporter.Core/Exporting/Filtering/BinaryExpressionKind.cs

@@ -4,4 +4,4 @@ internal enum BinaryExpressionKind
 {
     Or,
     And
-}
+}

DiscordChatExporter.Core/Exporting/Filtering/BinaryExpressionMessageFilter.cs

@@ -9,17 +9,22 @@ internal class BinaryExpressionMessageFilter : MessageFilter
     private readonly MessageFilter _second;
     private readonly BinaryExpressionKind _kind;
 
-    public BinaryExpressionMessageFilter(MessageFilter first, MessageFilter second, BinaryExpressionKind kind)
+    public BinaryExpressionMessageFilter(
+        MessageFilter first,
+        MessageFilter second,
+        BinaryExpressionKind kind
+    )
     {
         _first = first;
         _second = second;
         _kind = kind;
     }
 
-    public override bool IsMatch(Message message) => _kind switch
-    {
-        BinaryExpressionKind.Or => _first.IsMatch(message) || _second.IsMatch(message),
-        BinaryExpressionKind.And => _first.IsMatch(message) && _second.IsMatch(message),
-        _ => throw new InvalidOperationException($"Unknown binary expression kind '{_kind}'.")
-    };
-}
+    public override bool IsMatch(Message message) =>
+        _kind switch
+        {
+            BinaryExpressionKind.Or => _first.IsMatch(message) || _second.IsMatch(message),
+            BinaryExpressionKind.And => _first.IsMatch(message) && _second.IsMatch(message),
+            _ => throw new InvalidOperationException($"Unknown binary expression kind '{_kind}'.")
+        };
+}

DiscordChatExporter.Core/Exporting/Filtering/ContainsMessageFilter.cs

@@ -17,25 +17,21 @@ internal class ContainsMessageFilter : MessageFilter
     // parentheses are not considered word characters.
     // https://github.com/Tyrrrz/DiscordChatExporter/issues/909
     private bool IsMatch(string? content) =>
-        !string.IsNullOrWhiteSpace(content) &&
-        Regex.IsMatch(
+        !string.IsNullOrWhiteSpace(content)
+        && Regex.IsMatch(
             content,
-            @"(?:\b|\s|^)" +
-            Regex.Escape(_text) +
-            @"(?:\b|\s|$)",
+            @"(?:\b|\s|^)" + Regex.Escape(_text) + @"(?:\b|\s|$)",
             RegexOptions.IgnoreCase | RegexOptions.CultureInvariant
         );
 
     public override bool IsMatch(Message message) =>
-        IsMatch(message.Content) ||
-        message.Embeds.Any(e =>
-            IsMatch(e.Title) ||
-            IsMatch(e.Author?.Name) ||
-            IsMatch(e.Description) ||
-            IsMatch(e.Footer?.Text) ||
-            e.Fields.Any(f =>
-                IsMatch(f.Name) ||
-                IsMatch(f.Value)
-            )
+        IsMatch(message.Content)
+        || message.Embeds.Any(
+            e =>
+                IsMatch(e.Title)
+                || IsMatch(e.Author?.Name)
+                || IsMatch(e.Description)
+                || IsMatch(e.Footer?.Text)
+                || e.Fields.Any(f => IsMatch(f.Name) || IsMatch(f.Value))
         );
-}
+}