Update version

Fix crash when parsing position on DM channels (#496 )
[CLI] Fix missing channel category bug when API returns empty string (#492 )
2026-07-07 06:39:33 +02:00 · 2021-02-06 21:22:42 +02:00 · 2021-02-06 17:00:29 +02:00 · 2021-02-02 14:42:04 +02:00 · 2021-01-31 17:23:46 +02:00 · 2021-01-28 22:01:13 +02:00
114 changed files with 2328 additions and 1485 deletions
@@ -1,63 +0,0 @@
-###############################################################################
-# Set default behavior to automatically normalize line endings.
-###############################################################################
-* text=auto
-
-###############################################################################
-# Set default behavior for command prompt diff.
-#
-# This is need for earlier builds of msysgit that does not have it on by
-# default for csharp files.
-# Note: This is only used by command line
-###############################################################################
-#*.cs     diff=csharp
-
-###############################################################################
-# Set the merge driver for project and solution files
-#
-# Merging from the command prompt will add diff markers to the files if there
-# are conflicts (Merging from VS is not affected by the settings below, in VS
-# the diff markers are never inserted). Diff markers may cause the following 
-# file extensions to fail to load in VS. An alternative would be to treat
-# these files as binary and thus will always conflict and require user
-# intervention with every merge. To do so, just uncomment the entries below
-###############################################################################
-#*.sln       merge=binary
-#*.csproj    merge=binary
-#*.vbproj    merge=binary
-#*.vcxproj   merge=binary
-#*.vcproj    merge=binary
-#*.dbproj    merge=binary
-#*.fsproj    merge=binary
-#*.lsproj    merge=binary
-#*.wixproj   merge=binary
-#*.modelproj merge=binary
-#*.sqlproj   merge=binary
-#*.wwaproj   merge=binary
-
-###############################################################################
-# behavior for image files
-#
-# image files are treated as binary by default.
-###############################################################################
-#*.jpg   binary
-#*.png   binary
-#*.gif   binary
-
-###############################################################################
-# diff behavior for common document formats
-# 
-# Convert binary document formats to text before diffing them. This feature
-# is only available from the command line. Turn it on by uncommenting the 
-# entries below.
-###############################################################################
-#*.doc   diff=astextplain
-#*.DOC   diff=astextplain
-#*.docx  diff=astextplain
-#*.DOCX  diff=astextplain
-#*.dot   diff=astextplain
-#*.DOT   diff=astextplain
-#*.pdf   diff=astextplain
-#*.PDF   diff=astextplain
-#*.rtf   diff=astextplain
-#*.RTF   diff=astextplain
@@ -3,64 +3,69 @@ name: CD
 on:
  push:
    tags:
-    - '*'
+      - "*"

 jobs:
  build:
    runs-on: windows-latest

    steps:
-    - name: Checkout
-      uses: actions/checkout@v2
+      - name: Checkout
+        uses: actions/checkout@v2.3.3

-    - name: Install .NET Core
-      uses: actions/setup-dotnet@v1.4.0
-      with:
-        dotnet-version: 3.1.100
+      - name: Install .NET (v3.1)
+        uses: actions/setup-dotnet@v1.7.2
+        with:
+          dotnet-version: 3.1.x

-    - name: Build & publish (CLI)
-      run: dotnet publish DiscordChatExporter.Cli/ -o DiscordChatExporter.Cli/bin/Publish/ --configuration Release
+      - name: Install .NET (v5.0)
+        uses: actions/setup-dotnet@v1.7.2
+        with:
+          dotnet-version: 5.0.x

-    - name: Build & publish (GUI)
-      run: dotnet publish DiscordChatExporter.Gui/ -o DiscordChatExporter.Gui/bin/Publish/ --configuration Release
+      - name: Build & publish (CLI)
+        run: dotnet publish DiscordChatExporter.Cli/ -o DiscordChatExporter.Cli/bin/Publish/ --configuration Release

-    - name: Pack (CLI)
-      run: Compress-Archive -Path DiscordChatExporter.Cli/bin/Publish/* -DestinationPath DiscordChatExporter.Cli/bin/Publish/Archive.zip -Force
-      shell: pwsh
+      - name: Build & publish (GUI)
+        run: dotnet publish DiscordChatExporter.Gui/ -o DiscordChatExporter.Gui/bin/Publish/ --configuration Release

-    - name: Pack (GUI)
-      run: Compress-Archive -Path DiscordChatExporter.Gui/bin/Publish/* -DestinationPath DiscordChatExporter.Gui/bin/Publish/Archive.zip -Force
-      shell: pwsh
+      - name: Pack (CLI)
+        run: Compress-Archive -Path DiscordChatExporter.Cli/bin/Publish/* -DestinationPath DiscordChatExporter.Cli/bin/Publish/Archive.zip -Force
+        shell: pwsh

-    - name: Create release
-      id: create_release
-      uses: actions/create-release@v1.0.1
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      with:
-        tag_name: ${{ github.ref }}
-        release_name: ${{ github.ref }}
-        body: |
-          [Changelog](https://github.com/Tyrrrz/DiscordChatExporter/blob/master/Changelog.md)
-        draft: false
-        prerelease: false
+      - name: Pack (GUI)
+        run: Compress-Archive -Path DiscordChatExporter.Gui/bin/Publish/* -DestinationPath DiscordChatExporter.Gui/bin/Publish/Archive.zip -Force
+        shell: pwsh

-    - name: Upload release asset (CLI)
-      uses: actions/upload-release-asset@v1.0.2
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      with:
-        upload_url: ${{ steps.create_release.outputs.upload_url }}
-        asset_path: DiscordChatExporter.Cli/bin/Publish/Archive.zip
-        asset_name: DiscordChatExporter.CLI.zip
-        asset_content_type: application/zip
+      - name: Create release
+        id: create_release
+        uses: actions/create-release@v1.0.1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: ${{ github.ref }}
+          body: |
+            [Changelog](https://github.com/Tyrrrz/DiscordChatExporter/blob/master/Changelog.md)
+          draft: false
+          prerelease: false

-    - name: Upload release asset (GUI)
-      uses: actions/upload-release-asset@v1.0.2
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      with:
-        upload_url: ${{ steps.create_release.outputs.upload_url }}
-        asset_path: DiscordChatExporter.Gui/bin/Publish/Archive.zip
-        asset_name: DiscordChatExporter.zip
-        asset_content_type: application/zip
+      - name: Upload release asset (CLI)
+        uses: actions/upload-release-asset@v1.0.2
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: DiscordChatExporter.Cli/bin/Publish/Archive.zip
+          asset_name: DiscordChatExporter.CLI.zip
+          asset_content_type: application/zip
+
+      - name: Upload release asset (GUI)
+        uses: actions/upload-release-asset@v1.0.2
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: DiscordChatExporter.Gui/bin/Publish/Archive.zip
+          asset_name: DiscordChatExporter.zip
+          asset_content_type: application/zip
@@ -7,28 +7,33 @@ jobs:
    runs-on: windows-latest

    steps:
-    - name: Checkout
-      uses: actions/checkout@v2
+      - name: Checkout
+        uses: actions/checkout@v2.3.3

-    - name: Install .NET Core
-      uses: actions/setup-dotnet@v1.4.0
-      with:
-        dotnet-version: 3.1.100
+      - name: Install .NET (v3.1)
+        uses: actions/setup-dotnet@v1.7.2
+        with:
+          dotnet-version: 3.1.x

-    - name: Build & publish (CLI)
-      run: dotnet publish DiscordChatExporter.Cli/ -o DiscordChatExporter.Cli/bin/Publish/ --configuration Release
+      - name: Install .NET (v5.0)
+        uses: actions/setup-dotnet@v1.7.2
+        with:
+          dotnet-version: 5.0.x

-    - name: Build & publish (GUI)
-      run: dotnet publish DiscordChatExporter.Gui/ -o DiscordChatExporter.Gui/bin/Publish/ --configuration Release
+      - name: Build & publish (CLI)
+        run: dotnet publish DiscordChatExporter.Cli/ -o DiscordChatExporter.Cli/bin/Publish/ --configuration Release

-    - name: Upload build artifacts (CLI)
-      uses: actions/upload-artifact@v1
-      with:
-        name: DiscordChatExporter.CLI
-        path: DiscordChatExporter.Cli/bin/Publish/
+      - name: Build & publish (GUI)
+        run: dotnet publish DiscordChatExporter.Gui/ -o DiscordChatExporter.Gui/bin/Publish/ --configuration Release

-    - name: Upload build artifact (GUI)
-      uses: actions/upload-artifact@v1
-      with:
-        name: DiscordChatExporter
-        path: DiscordChatExporter.Gui/bin/Publish/
+      - name: Upload build artifacts (CLI)
+        uses: actions/upload-artifact@v1
+        with:
+          name: DiscordChatExporter.CLI
+          path: DiscordChatExporter.Cli/bin/Publish/
+
+      - name: Upload build artifact (GUI)
+        uses: actions/upload-artifact@v1
+        with:
+          name: DiscordChatExporter
+          path: DiscordChatExporter.Gui/bin/Publish/
@@ -1,261 +1,22 @@
-## Ignore Visual Studio temporary files, build results, and
-## files generated by popular Visual Studio add-ons.
-
 # User-specific files
 *.suo
 *.user
 *.userosscache
 *.sln.docstates
-
-# User-specific files (MonoDevelop/Xamarin Studio)
-*.userprefs
+.idea/
+.vs/

 # Build results
 [Dd]ebug/
 [Dd]ebugPublic/
 [Rr]elease/
 [Rr]eleases/
-x64/
-x86/
+[Xx]64/
+[Xx]86/
+[Bb]uild/
 bld/
 [Bb]in/
 [Oo]bj/
-[Ll]og/

-# Visual Studio 2015 cache/options directory
-.vs/
-# Uncomment if you have tasks that create the project's static files in wwwroot
-#wwwroot/
-
-# MSTest test Results
-[Tt]est[Rr]esult*/
-[Bb]uild[Ll]og.*
-
-# NUNIT
-*.VisualState.xml
-TestResult.xml
-
-# Build Results of an ATL Project
-[Dd]ebugPS/
-[Rr]eleasePS/
-dlldata.c
-
-# DNX
-project.lock.json
-project.fragment.lock.json
-artifacts/
-
-*_i.c
-*_p.c
-*_i.h
-*.ilk
-*.meta
-*.obj
-*.pch
-*.pdb
-*.pgc
-*.pgd
-*.rsp
-*.sbr
-*.tlb
-*.tli
-*.tlh
-*.tmp
-*.tmp_proj
-*.log
-*.vspscc
-*.vssscc
-.builds
-*.pidb
-*.svclog
-*.scc
-
-# Chutzpah Test files
-_Chutzpah*
-
-# Visual C++ cache files
-ipch/
-*.aps
-*.ncb
-*.opendb
-*.opensdf
-*.sdf
-*.cachefile
-*.VC.db
-*.VC.VC.opendb
-
-# Visual Studio profiler
-*.psess
-*.vsp
-*.vspx
-*.sap
-
-# TFS 2012 Local Workspace
-$tf/
-
-# Guidance Automation Toolkit
-*.gpState
-
-# ReSharper is a .NET coding add-in
-_ReSharper*/
-*.[Rr]e[Ss]harper
-*.DotSettings.user
-
-# JustCode is a .NET coding add-in
-.JustCode
-
-# TeamCity is a build add-in
-_TeamCity*
-
-# DotCover is a Code Coverage Tool
-*.dotCover
-
-# NCrunch
-_NCrunch_*
-.*crunch*.local.xml
-nCrunchTemp_*
-
-# MightyMoose
-*.mm.*
-AutoTest.Net/
-
-# Web workbench (sass)
-.sass-cache/
-
-# Installshield output folder
-[Ee]xpress/
-
-# DocProject is a documentation generator add-in
-DocProject/buildhelp/
-DocProject/Help/*.HxT
-DocProject/Help/*.HxC
-DocProject/Help/*.hhc
-DocProject/Help/*.hhk
-DocProject/Help/*.hhp
-DocProject/Help/Html2
-DocProject/Help/html
-
-# Click-Once directory
-publish/
-
-# Publish Web Output
-*.[Pp]ublish.xml
-*.azurePubxml
-# TODO: Comment the next line if you want to checkin your web deploy settings
-# but database connection strings (with potential passwords) will be unencrypted
-#*.pubxml
-*.publishproj
-
-# Microsoft Azure Web App publish settings. Comment the next line if you want to
-# checkin your Azure Web App publish settings, but sensitive information contained
-# in these scripts will be unencrypted
-PublishScripts/
-
-# NuGet Packages
-*.nupkg
-# The packages folder can be ignored because of Package Restore
-**/packages/*
-# except build/, which is used as an MSBuild target.
-!**/packages/build/
-# Uncomment if necessary however generally it will be regenerated when needed
-#!**/packages/repositories.config
-# NuGet v3's project.json files produces more ignoreable files
-*.nuget.props
-*.nuget.targets
-
-# Microsoft Azure Build Output
-csx/
-*.build.csdef
-
-# Microsoft Azure Emulator
-ecf/
-rcf/
-
-# Windows Store app package directories and files
-AppPackages/
-BundleArtifacts/
-Package.StoreAssociation.xml
-_pkginfo.txt
-
-# Visual Studio cache files
-# files ending in .cache can be ignored
-*.[Cc]ache
-# but keep track of directories ending in .cache
-!*.[Cc]ache/
-
-# Others
-ClientBin/
-~$*
-*~
-*.dbmdl
-*.dbproj.schemaview
-*.jfm
-*.pfx
-*.publishsettings
-node_modules/
-orleans.codegen.cs
-
-# Since there are multiple workflows, uncomment next line to ignore bower_components
-# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
-#bower_components/
-
-# RIA/Silverlight projects
-Generated_Code/
-
-# Backup & report files from converting an old project file
-# to a newer Visual Studio version. Backup files are not needed,
-# because we have git ;-)
-_UpgradeReport_Files/
-Backup*/
-UpgradeLog*.XML
-UpgradeLog*.htm
-
-# SQL Server files
-*.mdf
-*.ldf
-
-# Business Intelligence projects
-*.rdl.data
-*.bim.layout
-*.bim_*.settings
-
-# Microsoft Fakes
-FakesAssemblies/
-
-# GhostDoc plugin setting file
-*.GhostDoc.xml
-
-# Node.js Tools for Visual Studio
-.ntvs_analysis.dat
-
-# Visual Studio 6 build log
-*.plg
-
-# Visual Studio 6 workspace options file
-*.opt
-
-# Visual Studio LightSwitch build output
-**/*.HTMLClient/GeneratedArtifacts
-**/*.DesktopClient/GeneratedArtifacts
-**/*.DesktopClient/ModelManifest.xml
-**/*.Server/GeneratedArtifacts
-**/*.Server/ModelManifest.xml
-_Pvt_Extensions
-
-# Paket dependency manager
-.paket/paket.exe
-paket-files/
-
-# FAKE - F# Make
-.fake/
-
-# JetBrains Rider
-.idea/
-*.sln.iml
-
-# CodeRush
-.cr/
-
-# Python Tools for Visual Studio (PTVS)
-__pycache__/
-*.pyc
+# Coverage
+*.opencover.xml
@@ -1,3 +1,65 @@
+### v2.26.1 (06-Feb-2021)
+
+- [CLI] Added support for file name templates, which allow you to dynamically generate output file names based on channel and guild metadata. (Thanks [@Lucas LaBuff](https://github.com/96-LB))
+- Fixed an issue where the application sometimes crashed with `Invalid snowflake` message when exporting chat logs that contained invalid or outdated mentions. (Thanks [@Lucas LaBuff](https://github.com/96-LB))
+
+### v2.26 (29-Dec-2020)
+
+- [HTML] Added support for replies. (Thanks [@Sanqui](https://github.com/Sanqui))
+- [HTML] Improved styling of non-media attachments (regular files, i.e. not video, audio, or image). (Thanks [@Lucas LaBuff](https://github.com/96-LB))
+- [HTML] Improved initial export performance.
+- [JSON] Relaxed escaping rules for unicode characters. (Thanks [@Sanqui](https://github.com/Sanqui))
+- [JSON] Added support for replies. (Thanks [@Sanqui](https://github.com/Sanqui))
+- [CLI] Added channel names to errors shown on failures when exporting multiple channels. (Thanks [@Sanqui](https://github.com/Sanqui))
+- [CLI] Added support for passing message IDs (snowflakes) to `--after` and `--before` options. (Thanks [@Andrew Kolos](https://github.com/andrewkolos))
+- Files downloaded by the "download referenced media" option now have their dates set according to the `Last-Modified` header provided by Discord CDN. (Thanks [@Andrew Kolos](https://github.com/andrewkolos))
+- Fixed an issue where the application sometimes crashed with `NullReferenceException` when retrying a failed HTTP request.
+- Migrated to Discord API v8.
+
+### v2.25 (23-Nov-2020)
+
+- [JSON] Added `mentions` property to the output. This contains users referenced inside the message text, but doesn't include mentions in embeds. (Thanks [@Andrew Kolos](https://github.com/andrewkolos))
+- [HTML] Added better previews for attached video and audio. They are now rendered using a browser native player element. The actual file path can still be retrieved by right clicking and selecting "Copy file path". (Thanks [@sas41](https://github.com/sas41))
+- [CLI] Fixed an issue where using `--media` option without providing a rooted path via `--output` option triggered an error.
+- [CLI] Fixed an issue where using `--reuse-media` option without also providing `--media` option was accepted, but didn't actually do anything. Now this produces an error instead. (Thanks [@Andrew Kolos](https://github.com/andrewkolos))
+
+### v2.24 (24-Oct-2020)
+
+- [CLI] Updated to [CliFx v1.5](https://github.com/Tyrrrz/CliFx), which brings some UX improvements.
+- [GUI] Added dark mode, which can be enabled in settings. (Thanks [@Andrew Kolos](https://github.com/andrewkolos))
+- [GUI] Improved the UX in a few minor places.
+- [JSON] Added `embed.color` property to the output. (Thanks [@Andrew Kolos](https://github.com/andrewkolos))
+- Added additional date formats: `unix` to write dates as a unix timestamp and `unixms` for the milliseconds version. (Thanks [@Andrew Kolos](https://github.com/andrewkolos))
+- Added retry policy for downloading media content. This is mostly a workaround for transient failures that sometimes may occur when downloading assets referenced from embeds. (Thanks [@Andrew Kolos](https://github.com/andrewkolos))
+- Added an option to reuse already downloaded media to avoid redundant network requests. It can be enabled in settings in GUI, or by passing `--reuse-media` in CLI. To facilitate this feature, the file name strategy has been changed as well -- now instead of relying on the original file name and adding `(n)` to the end in case of duplicates, a URL hash is injected in every file name. This also means that when the "reuse media" option is disabled, existing files inside the media directory may be overwritten. (Thanks [@Andrew Kolos](https://github.com/andrewkolos))
+
+### v2.23 (14-Sep-2020)
+
+- [CLI] Added a command to export all channels across all servers. Use `exportall` to do it. (Thanks [@wyattscarpenter](https://github.com/wyattscarpenter))
+- [HTML] Fixed an issue where Whitney fonts were not being loaded properly, causing the browser to fall back to Helvetica.
+- Fixed an issue where self-contained export crashed occasionally. This usually happened when the server hosting the file did not serve the stream properly. Such files are now ignored after the first failed attempt.
+
+### v2.22 (12-Aug-2020)
+
+- [GUI] Improved the channel list by adding collapsible category groups. (Thanks [@CarJem Generations](https://github.com/CarJem))
+- [GUI] Improved exporting options by adding a set of controls that can be used to limit the date range of the export down to minutes. Previously it was only possible to configure the date range without the time component. (Thanks [@CarJem Generations](https://github.com/CarJem))
+- [HTML] Fixed an issue where the export didn't reflect changes in nicknames between messages sent by bots. This affected chat logs that contained interactions with the Tupperbox bot. (Thanks [@CarJem Generations](https://github.com/CarJem))
+- [CLI] Fixed an issue where the application crashed if there were two environment variables defined that had the same name but in different case.
+
+### v2.21.2 (30-Jul-2020)
+
+- [GUI] When copy-pasting token, any surrounding spaces are now discarded, in addition to double quotes.
+- [HTML] Changed underlying templating engine to provide higher performance and better error messages. New templating engine adds a small cold start, but any export after the first should be faster.
+- Changed naming schema for downloaded media so that it follows `<original filename> (nn)` format rather than `<original filename>-salt`.
+- [HTML] Fixed an issue where downloaded media was sometimes inaccessible due to reserved characters appearing in the URL.
+- Fixed an issue where the application crashed when trying to download media with a file name that exceeds system's maximum allowed length.
+- Fixed an issue where the application crashed when trying to download media with illegal characters in the file name.
+
+### v2.21.1 (19-Jul-2020)
+
+- Fixed an issue where the export crashed if an embedded image has been deleted. Such media files are now ignored.
+- Changed the naming convention for downloaded media files so that the original file names are used when possible.
+
 ### v2.21 (18-Jul-2020)

 - Added a new option that enables self-contained exports for all output formats. You can turn it on in the export setup dialog in GUI or using the `--media` option in CLI. When using this, the application will additionally download any media content directly referenced from the exported file instead of linking back to Discord CDN. The files which are downloaded include: guild icons, user avatars, attachments, embedded images, reaction emojis. Note that only files which are actually referenced by the export are downloaded, which means that, for example, user avatars will not be downloaded when using plain text export format. This option is not meant to enable complete offline viewing for HTML exports, but rather to make it easier to archive media content that may eventually get deleted from Discord servers. Also keep in mind that this option may make the export drastically slower and the total file size larger.
@@ -2,11 +2,12 @@

  <PropertyGroup>
    <TargetFramework>netcoreapp3.1</TargetFramework>
-    <Version>2.21</Version>
+    <Version>2.26.1</Version>
    <Company>Tyrrrz</Company>
    <Copyright>Copyright (c) Alexey Golub</Copyright>
-    <LangVersion>latest</LangVersion>
+    <LangVersion>preview</LangVersion>
    <Nullable>enable</Nullable>
+    <WarningsAsErrors>nullable</WarningsAsErrors>
  </PropertyGroup>

-</Project>
+</Project>
@@ -1,9 +1,10 @@
-using System;
-using System.IO;
+using System.IO;
 using System.Threading.Tasks;
 using CliFx;
 using CliFx.Attributes;
+using CliFx.Exceptions;
 using CliFx.Utilities;
+using DiscordChatExporter.Domain.Discord;
 using DiscordChatExporter.Domain.Discord.Models;
 using DiscordChatExporter.Domain.Exporting;

@@ -12,27 +13,30 @@ namespace DiscordChatExporter.Cli.Commands.Base
    public abstract class ExportCommandBase : TokenCommandBase
    {
        [CommandOption("output", 'o', Description = "Output file or directory path.")]
-        public string OutputPath { get; set; } = Directory.GetCurrentDirectory();
+        public string OutputPath { get; init; } = Directory.GetCurrentDirectory();

-        [CommandOption("format", 'f', Description = "Output file format.")]
-        public ExportFormat ExportFormat { get; set; } = ExportFormat.HtmlDark;
+        [CommandOption("format", 'f', Description = "Export format.")]
+        public ExportFormat ExportFormat { get; init; } = ExportFormat.HtmlDark;

-        [CommandOption("after", Description = "Limit to messages sent after this date.")]
-        public DateTimeOffset? After { get; set; }
+        [CommandOption("after", Description = "Only include messages sent after this date or message ID.")]
+        public Snowflake? After { get; init; }

-        [CommandOption("before", Description = "Limit to messages sent before this date.")]
-        public DateTimeOffset? Before { get; set; }
+        [CommandOption("before", Description = "Only include messages sent before this date or message ID.")]
+        public Snowflake? Before { get; init; }

        [CommandOption("partition", 'p', Description = "Split output into partitions limited to this number of messages.")]
-        public int? PartitionLimit { get; set; }
+        public int? PartitionLimit { get; init; }

        [CommandOption("media", Description = "Download referenced media content.")]
-        public bool ShouldDownloadMedia { get; set; }
+        public bool ShouldDownloadMedia { get; init; }

-        [CommandOption("dateformat", Description = "Date format used in output.")]
-        public string DateFormat { get; set; } = "dd-MMM-yy hh:mm tt";
+        [CommandOption("reuse-media", Description = "Reuse already existing media content to skip redundant downloads.")]
+        public bool ShouldReuseMedia { get; init; }

-        protected ChannelExporter GetChannelExporter() => new ChannelExporter(GetDiscordClient());
+        [CommandOption("dateformat", Description = "Format used when writing dates.")]
+        public string DateFormat { get; init; } = "dd-MMM-yy hh:mm tt";
+
+        protected ChannelExporter GetChannelExporter() => new(GetDiscordClient());

        protected async ValueTask ExportAsync(IConsole console, Guild guild, Channel channel)
        {
@@ -48,6 +52,7 @@ namespace DiscordChatExporter.Cli.Commands.Base
                Before,
                PartitionLimit,
                ShouldDownloadMedia,
+                ShouldReuseMedia,
                DateFormat
            );

@@ -63,10 +68,20 @@ namespace DiscordChatExporter.Cli.Commands.Base
            await ExportAsync(console, guild, channel);
        }

-        protected async ValueTask ExportAsync(IConsole console, string channelId)
+        protected async ValueTask ExportAsync(IConsole console, Snowflake channelId)
        {
            var channel = await GetDiscordClient().GetChannelAsync(channelId);
            await ExportAsync(console, channel);
        }
+
+        public override ValueTask ExecuteAsync(IConsole console)
+        {
+            if (ShouldReuseMedia && !ShouldDownloadMedia)
+            {
+                throw new CommandException("The --reuse-media option cannot be used without the --media option.");
+            }
+
+            return default;
+        }
    }
 }
@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
@@ -16,21 +17,22 @@ namespace DiscordChatExporter.Cli.Commands.Base
 {
    public abstract class ExportMultipleCommandBase : ExportCommandBase
    {
-        [CommandOption("parallel", Description = "Export this number of channels in parallel.")]
-        public int ParallelLimit { get; set; } = 1;
+        [CommandOption("parallel", Description = "Limits how many channels can be exported in parallel.")]
+        public int ParallelLimit { get; init; } = 1;

        protected async ValueTask ExportMultipleAsync(IConsole console, IReadOnlyList<Channel> channels)
        {
-            // HACK: this uses a separate route from ExportCommandBase because the progress ticker is not thread-safe
+            // This uses a different route from ExportCommandBase.ExportAsync() because it runs
+            // in parallel and needs another way to report progress to console.

            console.Output.Write($"Exporting {channels.Count} channels... ");
            var progress = console.CreateProgressTicker();

            var operations = progress.Wrap().CreateOperations(channels.Count);

-            var errors = new List<string>();
-
            var successfulExportCount = 0;
+            var errors = new ConcurrentBag<(Channel, string)>();
+
            await channels.Zip(operations).ParallelForEachAsync(async tuple =>
            {
                var (channel, operation) = tuple;
@@ -48,6 +50,7 @@ namespace DiscordChatExporter.Cli.Commands.Base
                        Before,
                        PartitionLimit,
                        ShouldDownloadMedia,
+                        ShouldReuseMedia,
                        DateFormat
                    );

@@ -57,7 +60,7 @@ namespace DiscordChatExporter.Cli.Commands.Base
                }
                catch (DiscordChatExporterException ex) when (!ex.IsCritical)
                {
-                    errors.Add(ex.Message);
+                    errors.Add((channel, ex.Message));
                }
                finally
                {
@@ -67,8 +70,8 @@ namespace DiscordChatExporter.Cli.Commands.Base

            console.Output.WriteLine();

-            foreach (var error in errors)
-                console.Error.WriteLine(error);
+            foreach (var (channel, error) in errors)
+                console.Error.WriteLine($"Channel '{channel}': {error}");

            console.Output.WriteLine($"Successfully exported {successfulExportCount} channel(s).");
        }
@@ -7,17 +7,20 @@ namespace DiscordChatExporter.Cli.Commands.Base
 {
    public abstract class TokenCommandBase : ICommand
    {
-        [CommandOption("token", 't', IsRequired = true, EnvironmentVariableName = "DISCORD_TOKEN",
-            Description = "Authorization token.")]
-        public string TokenValue { get; set; } = "";
+        [CommandOption("token", 't', IsRequired = true, EnvironmentVariableName = "DISCORD_TOKEN", Description = "Authorization token.")]
+        public string TokenValue { get; init; } = "";

-        [CommandOption("bot", 'b', EnvironmentVariableName = "DISCORD_TOKEN_BOT",
-            Description = "Whether this authorization token belongs to a bot.")]
-        public bool IsBotToken { get; set; }
+        [CommandOption("bot", 'b', EnvironmentVariableName = "DISCORD_TOKEN_BOT", Description = "Authorize as a bot.")]
+        public bool IsBotToken { get; init; }

-        protected AuthToken GetAuthToken() => new AuthToken(IsBotToken ? AuthTokenType.Bot : AuthTokenType.User, TokenValue);
+        protected AuthToken GetAuthToken() => new(
+            IsBotToken
+                ? AuthTokenType.Bot
+                : AuthTokenType.User,
+            TokenValue
+        );

-        protected DiscordClient GetDiscordClient() => new DiscordClient(GetAuthToken());
+        protected DiscordClient GetDiscordClient() => new(GetAuthToken());

        public abstract ValueTask ExecuteAsync(IConsole console);
    }
@@ -0,0 +1,36 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using CliFx;
+using CliFx.Attributes;
+using DiscordChatExporter.Cli.Commands.Base;
+using DiscordChatExporter.Domain.Discord.Models;
+
+namespace DiscordChatExporter.Cli.Commands
+{
+    [Command("exportall", Description = "Export all accessible channels.")]
+    public class ExportAllCommand : ExportMultipleCommandBase
+    {
+        [CommandOption("include-dm", Description = "Include direct message channels.")]
+        public bool IncludeDirectMessages { get; init; } = true;
+
+        public override async ValueTask ExecuteAsync(IConsole console)
+        {
+            var channels = new List<Channel>();
+
+            // Aggregate channels from all guilds
+            await foreach (var guild in GetDiscordClient().GetUserGuildsAsync())
+            {
+                // Skip DMs if instructed to
+                if (!IncludeDirectMessages && guild.Id == Guild.DirectMessages.Id)
+                    continue;
+
+                await foreach (var channel in GetDiscordClient().GetGuildChannelsAsync(guild.Id))
+                {
+                    channels.Add(channel);
+                }
+            }
+
+            await ExportMultipleAsync(console, channels);
+        }
+    }
+}
@@ -2,6 +2,7 @@
 using CliFx;
 using CliFx.Attributes;
 using DiscordChatExporter.Cli.Commands.Base;
+using DiscordChatExporter.Domain.Discord;

 namespace DiscordChatExporter.Cli.Commands
 {
@@ -9,8 +10,12 @@ namespace DiscordChatExporter.Cli.Commands
    public class ExportChannelCommand : ExportCommandBase
    {
        [CommandOption("channel", 'c', IsRequired = true, Description = "Channel ID.")]
-        public string ChannelId { get; set; } = "";
+        public Snowflake ChannelId { get; init; }

-        public override async ValueTask ExecuteAsync(IConsole console) => await ExportAsync(console, ChannelId);
+        public override async ValueTask ExecuteAsync(IConsole console)
+        {
+            await base.ExecuteAsync(console);
+            await ExportAsync(console, ChannelId);
+        }
    }
 }
@@ -12,8 +12,8 @@ namespace DiscordChatExporter.Cli.Commands
    {
        public override async ValueTask ExecuteAsync(IConsole console)
        {
-            var dmChannels = await GetDiscordClient().GetGuildChannelsAsync(Guild.DirectMessages.Id);
-            await ExportMultipleAsync(console, dmChannels);
+            var channels = await GetDiscordClient().GetGuildChannelsAsync(Guild.DirectMessages.Id);
+            await ExportMultipleAsync(console, channels);
        }
    }
 }
@@ -2,6 +2,7 @@
 using CliFx;
 using CliFx.Attributes;
 using DiscordChatExporter.Cli.Commands.Base;
+using DiscordChatExporter.Domain.Discord;
 using DiscordChatExporter.Domain.Utilities;

 namespace DiscordChatExporter.Cli.Commands
@@ -10,12 +11,12 @@ namespace DiscordChatExporter.Cli.Commands
    public class ExportGuildCommand : ExportMultipleCommandBase
    {
        [CommandOption("guild", 'g', IsRequired = true, Description = "Guild ID.")]
-        public string GuildId { get; set; } = "";
+        public Snowflake GuildId { get; init; }

        public override async ValueTask ExecuteAsync(IConsole console)
        {
-            var guildChannels = await GetDiscordClient().GetGuildChannelsAsync(GuildId);
-            await ExportMultipleAsync(console, guildChannels);
+            var channels = await GetDiscordClient().GetGuildChannelsAsync(GuildId);
+            await ExportMultipleAsync(console, channels);
        }
    }
 }
@@ -3,21 +3,23 @@ using System.Threading.Tasks;
 using CliFx;
 using CliFx.Attributes;
 using DiscordChatExporter.Cli.Commands.Base;
+using DiscordChatExporter.Domain.Discord;
+using DiscordChatExporter.Domain.Discord.Models.Common;
 using DiscordChatExporter.Domain.Utilities;

 namespace DiscordChatExporter.Cli.Commands
 {
-    [Command("channels", Description = "Get the list of channels in specified guild.")]
+    [Command("channels", Description = "Get the list of channels in a guild.")]
    public class GetChannelsCommand : TokenCommandBase
    {
        [CommandOption("guild", 'g', IsRequired = true, Description = "Guild ID.")]
-        public string GuildId { get; set; } = "";
+        public Snowflake GuildId { get; init; }

        public override async ValueTask ExecuteAsync(IConsole console)
        {
-            var guildChannels = await GetDiscordClient().GetGuildChannelsAsync(GuildId);
+            var channels = await GetDiscordClient().GetGuildChannelsAsync(GuildId);

-            foreach (var channel in guildChannels.OrderBy(c => c.Category).ThenBy(c => c.Name))
+            foreach (var channel in channels.OrderBy(c => c.Category, PositionBasedComparer.Instance).ThenBy(c => c.Name))
                console.Output.WriteLine($"{channel.Id} | {channel.Category} / {channel.Name}");
        }
    }
@@ -4,6 +4,7 @@ using CliFx;
 using CliFx.Attributes;
 using DiscordChatExporter.Cli.Commands.Base;
 using DiscordChatExporter.Domain.Discord.Models;
+using DiscordChatExporter.Domain.Discord.Models.Common;
 using DiscordChatExporter.Domain.Utilities;

 namespace DiscordChatExporter.Cli.Commands
@@ -13,9 +14,9 @@ namespace DiscordChatExporter.Cli.Commands
    {
        public override async ValueTask ExecuteAsync(IConsole console)
        {
-            var dmChannels = await GetDiscordClient().GetGuildChannelsAsync(Guild.DirectMessages.Id);
+            var channels = await GetDiscordClient().GetGuildChannelsAsync(Guild.DirectMessages.Id);

-            foreach (var channel in dmChannels.OrderBy(c => c.Category).ThenBy(c => c.Name))
+            foreach (var channel in channels.OrderBy(c => c.Name))
                console.Output.WriteLine($"{channel.Id} | {channel.Category} / {channel.Name}");
        }
    }
@@ -10,7 +10,9 @@ namespace DiscordChatExporter.Cli.Commands
    {
        public ValueTask ExecuteAsync(IConsole console)
        {
-            console.WithForegroundColor(ConsoleColor.White, () => console.Output.WriteLine("To get user token:"));
+            console.WithForegroundColor(ConsoleColor.White, () =>
+                console.Output.WriteLine("To get user token:")
+            );
            console.Output.WriteLine(" 1. Open Discord");
            console.Output.WriteLine(" 2. Press Ctrl+Shift+I to show developer tools");
            console.Output.WriteLine(" 3. Navigate to the Application tab");
@@ -20,14 +22,18 @@ namespace DiscordChatExporter.Cli.Commands
            console.Output.WriteLine(" *  Automating user accounts is technically against TOS, use at your own risk.");
            console.Output.WriteLine();

-            console.WithForegroundColor(ConsoleColor.White, () => console.Output.WriteLine("To get bot token:"));
+            console.WithForegroundColor(ConsoleColor.White, () =>
+                console.Output.WriteLine("To get bot token:")
+            );
            console.Output.WriteLine(" 1. Go to Discord developer portal");
            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();

-            console.WithForegroundColor(ConsoleColor.White, () => console.Output.WriteLine("To get guild ID or guild channel ID:"));
+            console.WithForegroundColor(ConsoleColor.White, () =>
+                console.Output.WriteLine("To get guild ID or guild channel ID:")
+            );
            console.Output.WriteLine(" 1. Open Discord");
            console.Output.WriteLine(" 2. Open Settings");
            console.Output.WriteLine(" 3. Go to Appearance section");
@@ -35,7 +41,9 @@ namespace DiscordChatExporter.Cli.Commands
            console.Output.WriteLine(" 5. Right click on the desired guild or channel and click Copy ID");
            console.Output.WriteLine();

-            console.WithForegroundColor(ConsoleColor.White, () => console.Output.WriteLine("To get direct message channel ID:"));
+            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");
@@ -44,8 +52,12 @@ namespace DiscordChatExporter.Cli.Commands
            console.Output.WriteLine(" 6. Copy the first long sequence of numbers inside the URL");
            console.Output.WriteLine();

-            console.Output.WriteLine("For more information, check out the wiki:");
-            console.Output.WriteLine("https://github.com/Tyrrrz/DiscordChatExporter/wiki");
+            console.WithForegroundColor(ConsoleColor.White,
+                () => console.Output.WriteLine("For more information, check out the wiki:")
+            );
+            console.WithForegroundColor(ConsoleColor.Blue,
+                () => console.Output.WriteLine("https://github.com/Tyrrrz/DiscordChatExporter/wiki")
+            );

            return default;
        }
@@ -1,5 +1,4 @@
 <Project Sdk="Microsoft.NET.Sdk">
-  <Import Project="../DiscordChatExporter.props" />

  <PropertyGroup>
    <OutputType>Exe</OutputType>
@@ -7,7 +6,7 @@
  </PropertyGroup>

  <ItemGroup>
-    <PackageReference Include="CliFx" Version="1.2.0" />
+    <PackageReference Include="CliFx" Version="1.6.0" />
    <PackageReference Include="Gress" Version="1.2.0" />
    <PackageReference Include="Tyrrrz.Extensions" Version="1.6.5" />
  </ItemGroup>
@@ -0,0 +1,9 @@
+// ReSharper disable CheckNamespace
+// TODO: remove after moving to .NET 5
+
+namespace System.Runtime.CompilerServices
+{
+    internal static class IsExternalInit
+    {
+    }
+}
@@ -8,51 +8,36 @@ using System.Threading.Tasks;
 using DiscordChatExporter.Domain.Discord.Models;
 using DiscordChatExporter.Domain.Exceptions;
 using DiscordChatExporter.Domain.Internal;
-using DiscordChatExporter.Domain.Internal.Extensions;
-using Polly;
+using DiscordChatExporter.Domain.Utilities;
+using JsonExtensions.Http;
+using JsonExtensions.Reading;

 namespace DiscordChatExporter.Domain.Discord
 {
    public class DiscordClient
    {
+        private readonly HttpClient _httpClient;
        private readonly AuthToken _token;
-        private readonly HttpClient _httpClient = Singleton.HttpClient;
-        private readonly IAsyncPolicy<HttpResponseMessage> _httpRequestPolicy;

-        private readonly Uri _baseUri = new Uri("https://discord.com/api/v6/", UriKind.Absolute);
+        private readonly Uri _baseUri = new("https://discord.com/api/v8/", UriKind.Absolute);

-        public DiscordClient(AuthToken token)
+        public DiscordClient(HttpClient httpClient, AuthToken token)
        {
+            _httpClient = httpClient;
            _token = token;
-
-            // Discord seems to always respond with 429 on the first request with unreasonable wait time (10+ minutes).
-            // For that reason the policy will ignore such errors at first, then wait a constant amount of time, and
-            // finally wait the specified amount of time, based on how many requests have failed in a row.
-            _httpRequestPolicy = Policy
-                .HandleResult<HttpResponseMessage>(m => m.StatusCode == HttpStatusCode.TooManyRequests)
-                .OrResult(m => m.StatusCode >= HttpStatusCode.InternalServerError)
-                .WaitAndRetryAsync(6,
-                    (i, result, ctx) =>
-                    {
-                        if (i <= 3)
-                            return TimeSpan.FromSeconds(2 * i);
-
-                        if (i <= 5)
-                            return TimeSpan.FromSeconds(5 * i);
-
-                        return result.Result.Headers.RetryAfter.Delta ?? TimeSpan.FromSeconds(10 * i);
-                    },
-                    (response, timespan, retryCount, context) => Task.CompletedTask
-                );
        }

-        private async ValueTask<HttpResponseMessage> GetResponseAsync(string url) => await _httpRequestPolicy.ExecuteAsync(async () =>
-        {
-            using var request = new HttpRequestMessage(HttpMethod.Get, new Uri(_baseUri, url));
-            request.Headers.Authorization = _token.GetAuthorizationHeader();
+        public DiscordClient(AuthToken token)
+            : this(Http.Client, token) {}

-            return await _httpClient.SendAsync(request, HttpCompletionOption.ResponseHeadersRead);
-        });
+        private async ValueTask<HttpResponseMessage> GetResponseAsync(string url) =>
+            await Http.ResponsePolicy.ExecuteAsync(async () =>
+            {
+                using var request = new HttpRequestMessage(HttpMethod.Get, new Uri(_baseUri, url));
+                request.Headers.Authorization = _token.GetAuthorizationHeader();
+
+                return await _httpClient.SendAsync(request, HttpCompletionOption.ResponseHeadersRead);
+            });

        private async ValueTask<JsonElement> GetJsonResponseAsync(string url)
        {
@@ -85,13 +70,14 @@ namespace DiscordChatExporter.Domain.Discord
        {
            yield return Guild.DirectMessages;

-            var afterId = "";
+            var currentAfter = Snowflake.Zero;
+
            while (true)
            {
                var url = new UrlBuilder()
                    .SetPath("users/@me/guilds")
                    .SetQueryParameter("limit", "100")
-                    .SetQueryParameter("after", afterId)
+                    .SetQueryParameter("after", currentAfter.ToString())
                    .Build();

                var response = await GetJsonResponseAsync(url);
@@ -101,7 +87,7 @@ namespace DiscordChatExporter.Domain.Discord
                {
                    yield return guild;

-                    afterId = guild.Id;
+                    currentAfter = guild.Id;
                    isEmpty = false;
                }

@@ -110,7 +96,7 @@ namespace DiscordChatExporter.Domain.Discord
            }
        }

-        public async ValueTask<Guild> GetGuildAsync(string guildId)
+        public async ValueTask<Guild> GetGuildAsync(Snowflake guildId)
        {
            if (guildId == Guild.DirectMessages.Id)
                return Guild.DirectMessages;
@@ -119,7 +105,7 @@ namespace DiscordChatExporter.Domain.Discord
            return Guild.Parse(response);
        }

-        public async IAsyncEnumerable<Channel> GetGuildChannelsAsync(string guildId)
+        public async IAsyncEnumerable<Channel> GetGuildChannelsAsync(Snowflake guildId)
        {
            if (guildId == Guild.DirectMessages.Id)
            {
@@ -131,32 +117,39 @@ namespace DiscordChatExporter.Domain.Discord
            {
                var response = await GetJsonResponseAsync($"guilds/{guildId}/channels");

-                var categories = response
+                var orderedResponse = response
                    .EnumerateArray()
-                    .ToDictionary(
-                        j => j.GetProperty("id").GetString(),
-                        j => j.GetProperty("name").GetString()
-                    );
+                    .OrderBy(j => j.GetProperty("position").GetInt32())
+                    .ThenBy(j => ulong.Parse(j.GetProperty("id").GetString()));

-                foreach (var channelJson in response.EnumerateArray())
+                var categories = orderedResponse
+                    .Where(j => j.GetProperty("type").GetInt32() == (int)ChannelType.GuildCategory)
+                    .Select((j, index) => ChannelCategory.Parse(j, index + 1))
+                    .ToDictionary(j => j.Id.ToString());
+
+                var position = 0;
+
+                foreach (var channelJson in orderedResponse)
                {
                    var parentId = channelJson.GetPropertyOrNull("parent_id")?.GetString();
                    var category = !string.IsNullOrWhiteSpace(parentId)
                        ? categories.GetValueOrDefault(parentId)
                        : null;
-
-                    var channel = Channel.Parse(channelJson, category);
+                    
+                    var channel = Channel.Parse(channelJson, category, position);

                    // Skip non-text channels
                    if (!channel.IsTextChannel)
                        continue;

+                    position++;
+
                    yield return channel;
                }
            }
        }

-        public async IAsyncEnumerable<Role> GetGuildRolesAsync(string guildId)
+        public async IAsyncEnumerable<Role> GetGuildRolesAsync(Snowflake guildId)
        {
            if (guildId == Guild.DirectMessages.Id)
                yield break;
@@ -167,7 +160,7 @@ namespace DiscordChatExporter.Domain.Discord
                yield return Role.Parse(roleJson);
        }

-        public async ValueTask<Member?> TryGetGuildMemberAsync(string guildId, User user)
+        public async ValueTask<Member?> TryGetGuildMemberAsync(Snowflake guildId, User user)
        {
            if (guildId == Guild.DirectMessages.Id)
                return Member.CreateForUser(user);
@@ -176,30 +169,43 @@ namespace DiscordChatExporter.Domain.Discord
            return response?.Pipe(Member.Parse);
        }

-        private async ValueTask<string> GetChannelCategoryAsync(string channelParentId)
+        public async ValueTask<ChannelCategory> GetChannelCategoryAsync(Snowflake channelId)
        {
-            var response = await GetJsonResponseAsync($"channels/{channelParentId}");
-            return response.GetProperty("name").GetString();
+            try
+            {
+                var response = await GetJsonResponseAsync($"channels/{channelId}");
+                return ChannelCategory.Parse(response);
+            }
+            /***
+             * In some cases, the Discord API returns an empty body when requesting some channel category info.
+             * Instead, we use an empty channel category as a fallback.
+             */
+            catch (DiscordChatExporterException)
+            {
+                return ChannelCategory.Empty;
+            }
+
        }

-        public async ValueTask<Channel> GetChannelAsync(string channelId)
+        public async ValueTask<Channel> GetChannelAsync(Snowflake channelId)
        {
            var response = await GetJsonResponseAsync($"channels/{channelId}");

-            var parentId = response.GetPropertyOrNull("parent_id")?.GetString();
-            var category = !string.IsNullOrWhiteSpace(parentId)
-                ? await GetChannelCategoryAsync(parentId)
+            var parentId = response.GetPropertyOrNull("parent_id")?.GetString().Pipe(Snowflake.Parse);
+
+            var category = parentId != null
+                ? await GetChannelCategoryAsync(parentId.Value)
                : null;

            return Channel.Parse(response, category);
        }

-        private async ValueTask<Message?> TryGetLastMessageAsync(string channelId, DateTimeOffset? before = null)
+        private async ValueTask<Message?> TryGetLastMessageAsync(Snowflake channelId, Snowflake? before = null)
        {
            var url = new UrlBuilder()
                .SetPath($"channels/{channelId}/messages")
                .SetQueryParameter("limit", "1")
-                .SetQueryParameter("before", before?.ToSnowflake())
+                .SetQueryParameter("before", before?.ToString())
                .Build();

            var response = await GetJsonResponseAsync(url);
@@ -207,9 +213,9 @@ namespace DiscordChatExporter.Domain.Discord
        }

        public async IAsyncEnumerable<Message> GetMessagesAsync(
-            string channelId,
-            DateTimeOffset? after = null,
-            DateTimeOffset? before = null,
+            Snowflake channelId,
+            Snowflake? after = null,
+            Snowflake? before = null,
            IProgress<double>? progress = null)
        {
            // Get the last message in the specified range.
@@ -217,19 +223,19 @@ namespace DiscordChatExporter.Domain.Discord
            // will not appear in the output.
            // Additionally, it provides the date of the last message, which is used to calculate progress.
            var lastMessage = await TryGetLastMessageAsync(channelId, before);
-            if (lastMessage == null || lastMessage.Timestamp < after)
+            if (lastMessage == null || lastMessage.Timestamp < after?.ToDate())
                yield break;

            // Keep track of first message in range in order to calculate progress
            var firstMessage = default(Message);
-            var afterId = after?.ToSnowflake() ?? "0";
+            var currentAfter = after ?? Snowflake.Zero;

            while (true)
            {
                var url = new UrlBuilder()
                    .SetPath($"channels/{channelId}/messages")
                    .SetQueryParameter("limit", "100")
-                    .SetQueryParameter("after", afterId)
+                    .SetQueryParameter("after", currentAfter.ToString())
                    .Build();

                var response = await GetJsonResponseAsync(url);
@@ -259,9 +265,9 @@ namespace DiscordChatExporter.Domain.Discord
                    );

                    yield return message;
-                    afterId = message.Id;
+                    currentAfter = message.Id;
                }
            }
        }
    }
-}
+}
@@ -1,16 +1,17 @@
 using System;
+using System.Collections.Generic;
 using System.IO;
-using System.Linq;
 using System.Text.Json;
 using DiscordChatExporter.Domain.Discord.Models.Common;
-using DiscordChatExporter.Domain.Internal.Extensions;
+using DiscordChatExporter.Domain.Utilities;
+using JsonExtensions.Reading;

 namespace DiscordChatExporter.Domain.Discord.Models
 {
    // https://discord.com/developers/docs/resources/channel#attachment-object
    public partial class Attachment : IHasId
    {
-        public string Id { get; }
+        public Snowflake Id { get; }

        public string Url { get; }

@@ -20,15 +21,18 @@ namespace DiscordChatExporter.Domain.Discord.Models

        public int? Height { get; }

-        public bool IsImage =>
-            ImageFileExtensions.Contains(Path.GetExtension(FileName), StringComparer.OrdinalIgnoreCase);
+        public bool IsImage => ImageFileExtensions.Contains(Path.GetExtension(FileName));
+
+        public bool IsVideo => VideoFileExtensions.Contains(Path.GetExtension(FileName));
+
+        public bool IsAudio => AudioFileExtensions.Contains(Path.GetExtension(FileName));

        public bool IsSpoiler =>
-            IsImage && FileName.StartsWith("SPOILER_", StringComparison.Ordinal);
+            (IsImage || IsVideo || IsAudio) && FileName.StartsWith("SPOILER_", StringComparison.Ordinal);

        public FileSize FileSize { get; }

-        public Attachment(string id, string url, string fileName, int? width, int? height, FileSize fileSize)
+        public Attachment(Snowflake id, string url, string fileName, int? width, int? height, FileSize fileSize)
        {
            Id = id;
            Url = url;
@@ -43,11 +47,18 @@ namespace DiscordChatExporter.Domain.Discord.Models

    public partial class Attachment
    {
-        private static readonly string[] ImageFileExtensions = {".jpg", ".jpeg", ".png", ".gif", ".bmp"};
+        private static readonly HashSet<string> ImageFileExtensions = new(StringComparer.OrdinalIgnoreCase)
+            {".jpg", ".jpeg", ".png", ".gif", ".bmp", ".webp"};
+
+        private static readonly HashSet<string> VideoFileExtensions = new(StringComparer.OrdinalIgnoreCase)
+            {".mp4", ".webm"};
+
+        private static readonly HashSet<string> AudioFileExtensions = new(StringComparer.OrdinalIgnoreCase)
+            {".mp3", ".wav", ".ogg", ".flac", ".m4a"};

        public static Attachment Parse(JsonElement json)
        {
-            var id = json.GetProperty("id").GetString();
+            var id = json.GetProperty("id").GetString().Pipe(Snowflake.Parse);
            var url = json.GetProperty("url").GetString();
            var width = json.GetPropertyOrNull("width")?.GetInt32();
            var height = json.GetPropertyOrNull("height")?.GetInt32();
@@ -1,7 +1,9 @@
-using System.Linq;
+using System;
+using System.Linq;
 using System.Text.Json;
 using DiscordChatExporter.Domain.Discord.Models.Common;
-using DiscordChatExporter.Domain.Internal.Extensions;
+using DiscordChatExporter.Domain.Utilities;
+using JsonExtensions.Reading;
 using Tyrrrz.Extensions;

 namespace DiscordChatExporter.Domain.Discord.Models
@@ -20,9 +22,9 @@ namespace DiscordChatExporter.Domain.Discord.Models
    }

    // https://discord.com/developers/docs/resources/channel#channel-object
-    public partial class Channel : IHasId
+    public partial class Channel : IHasIdAndPosition
    {
-        public string Id { get; }
+        public Snowflake Id { get; }

        public ChannelType Type { get; }

@@ -33,51 +35,61 @@ namespace DiscordChatExporter.Domain.Discord.Models
            Type == ChannelType.GuildNews ||
            Type == ChannelType.GuildStore;

-        public string GuildId { get; }
+        public Snowflake GuildId { get; }

-        public string Category { get; }
+        public ChannelCategory Category { get; }

        public string Name { get; }

+        public int? Position { get; }
+
        public string? Topic { get; }

-        public Channel(string id, ChannelType type, string guildId, string category, string name, string? topic)
+        public Channel(Snowflake id, ChannelType type, Snowflake guildId, ChannelCategory? category, string name, int? position, string? topic)
        {
            Id = id;
            Type = type;
            GuildId = guildId;
-            Category = category;
+            Category = category ?? GetDefaultCategory(type);
            Name = name;
+            Position = position;
            Topic = topic;
        }

        public override string ToString() => Name;
+
    }

    public partial class Channel
    {
-        private static string GetDefaultCategory(ChannelType channelType) => channelType switch
-        {
-            ChannelType.GuildTextChat => "Text",
-            ChannelType.DirectTextChat => "Private",
-            ChannelType.DirectGroupTextChat => "Group",
-            ChannelType.GuildNews => "News",
-            ChannelType.GuildStore => "Store",
-            _ => "Default"
-        };
+        private static ChannelCategory GetDefaultCategory(ChannelType channelType) => new(
+                Snowflake.Zero,
+                channelType switch
+                {
+                    ChannelType.GuildTextChat => "Text",
+                    ChannelType.DirectTextChat => "Private",
+                    ChannelType.DirectGroupTextChat => "Group",
+                    ChannelType.GuildNews => "News",
+                    ChannelType.GuildStore => "Store",
+                    _ => "Default"
+                },
+                0
+            );

-        public static Channel Parse(JsonElement json, string? category = null)
+        public static Channel Parse(JsonElement json, ChannelCategory? category = null, int? position = null)
        {
-            var id = json.GetProperty("id").GetString();
-            var guildId = json.GetPropertyOrNull("guild_id")?.GetString();
+            var id = json.GetProperty("id").GetString().Pipe(Snowflake.Parse);
+            var guildId = json.GetPropertyOrNull("guild_id")?.GetString().Pipe(Snowflake.Parse);
            var topic = json.GetPropertyOrNull("topic")?.GetString();

-            var type = (ChannelType) json.GetProperty("type").GetInt32();
+            var type = (ChannelType)json.GetProperty("type").GetInt32();

            var name =
                json.GetPropertyOrNull("name")?.GetString() ??
                json.GetPropertyOrNull("recipients")?.EnumerateArray().Select(User.Parse).Select(u => u.Name).JoinToString(", ") ??
-                id;
+                id.ToString();
+
+            position ??= json.GetPropertyOrNull("position")?.GetInt32();

            return new Channel(
                id,
@@ -85,6 +97,7 @@ namespace DiscordChatExporter.Domain.Discord.Models
                guildId ?? Guild.DirectMessages.Id,
                category ?? GetDefaultCategory(type),
                name,
+                position,
                topic
            );
        }
@@ -0,0 +1,50 @@
+using System;
+using System.Linq;
+using System.Text.Json;
+using DiscordChatExporter.Domain.Discord.Models.Common;
+using DiscordChatExporter.Domain.Utilities;
+using JsonExtensions.Reading;
+using Tyrrrz.Extensions;
+
+namespace DiscordChatExporter.Domain.Discord.Models
+{
+    public partial class ChannelCategory : IHasIdAndPosition
+    {
+        public Snowflake Id { get; }
+
+        public string Name { get; }
+
+        public int? Position { get; }
+
+        public ChannelCategory(Snowflake id, string name, int? position)
+        {
+            Id = id;
+            Name = name;
+            Position = position;
+        }
+
+        public override string ToString() => Name;
+
+    }
+
+    public partial class ChannelCategory
+    {
+        public static ChannelCategory Parse(JsonElement json, int? position = null)
+        {
+            var id = json.GetProperty("id").GetString().Pipe(Snowflake.Parse);
+            position ??= json.GetPropertyOrNull("position")?.GetInt32();
+
+            var name = json.GetPropertyOrNull("name")?.GetString() ??
+                json.GetPropertyOrNull("recipients")?.EnumerateArray().Select(User.Parse).Select(u => u.Name).JoinToString(", ") ??
+                id.ToString();
+
+            return new ChannelCategory(
+                id,
+                name,
+                position
+            );
+        }
+
+        public static ChannelCategory Empty { get; } = new(Snowflake.Zero, "Missing", 0);
+    }
+}
@@ -52,7 +52,7 @@ namespace DiscordChatExporter.Domain.Discord.Models.Common
            if (Math.Abs(TotalKiloBytes) >= 1)
                return "KB";

-            return "B";
+            return "bytes";
        }

        public override string ToString() => $"{GetLargestWholeNumberValue():0.##} {GetLargestWholeNumberSymbol()}";
@@ -60,6 +60,6 @@ namespace DiscordChatExporter.Domain.Discord.Models.Common

    public partial struct FileSize
    {
-        public static FileSize FromBytes(long bytes) => new FileSize(bytes);
+        public static FileSize FromBytes(long bytes) => new(bytes);
    }
 }
@@ -2,6 +2,6 @@
 {
    public interface IHasId
    {
-        string Id { get; }
+        Snowflake Id { get; }
    }
 }
@@ -0,0 +1,7 @@
+namespace DiscordChatExporter.Domain.Discord.Models.Common
+{
+    public interface IHasIdAndPosition : IHasId
+    {
+        int? Position { get; }
+    }
+}
@@ -5,13 +5,13 @@ namespace DiscordChatExporter.Domain.Discord.Models.Common
 {
    public partial class IdBasedEqualityComparer : IEqualityComparer<IHasId>
    {
-        public bool Equals(IHasId? x, IHasId? y) => StringComparer.Ordinal.Equals(x?.Id, y?.Id);
+        public bool Equals(IHasId? x, IHasId? y) => x?.Id == y?.Id;

-        public int GetHashCode(IHasId obj) => StringComparer.Ordinal.GetHashCode(obj.Id);
+        public int GetHashCode(IHasId obj) => obj.Id.GetHashCode();
    }

    public partial class IdBasedEqualityComparer
    {
-        public static IdBasedEqualityComparer Instance { get; } = new IdBasedEqualityComparer();
+        public static IdBasedEqualityComparer Instance { get; } = new();
    }
 }
@@ -0,0 +1,22 @@
+using System.Collections.Generic;
+
+namespace DiscordChatExporter.Domain.Discord.Models.Common
+{
+    public partial class PositionBasedComparer : IComparer<IHasIdAndPosition>
+    {
+        public int Compare(IHasIdAndPosition? x, IHasIdAndPosition? y)
+        {
+            int result = Comparer<int?>.Default.Compare(x?.Position, y?.Position);
+            if (result == 0)
+            {
+                result = Comparer<ulong?>.Default.Compare(x?.Id.Value, y?.Id.Value);
+            }
+            return result;
+        }
+    }
+
+    public partial class PositionBasedComparer
+    {
+        public static PositionBasedComparer Instance { get; } = new();
+    }
+}
@@ -4,6 +4,8 @@ using System.Drawing;
 using System.Linq;
 using System.Text.Json;
 using DiscordChatExporter.Domain.Internal.Extensions;
+using DiscordChatExporter.Domain.Utilities;
+using JsonExtensions.Reading;

 namespace DiscordChatExporter.Domain.Discord.Models
 {
@@ -1,5 +1,5 @@
 using System.Text.Json;
-using DiscordChatExporter.Domain.Internal.Extensions;
+using JsonExtensions.Reading;

 namespace DiscordChatExporter.Domain.Discord.Models
 {
@@ -1,5 +1,5 @@
 using System.Text.Json;
-using DiscordChatExporter.Domain.Internal.Extensions;
+using JsonExtensions.Reading;

 namespace DiscordChatExporter.Domain.Discord.Models
 {
@@ -1,5 +1,5 @@
 using System.Text.Json;
-using DiscordChatExporter.Domain.Internal.Extensions;
+using JsonExtensions.Reading;

 namespace DiscordChatExporter.Domain.Discord.Models
 {
@@ -1,5 +1,5 @@
 using System.Text.Json;
-using DiscordChatExporter.Domain.Internal.Extensions;
+using JsonExtensions.Reading;

 namespace DiscordChatExporter.Domain.Discord.Models
 {
@@ -2,7 +2,7 @@
 using System.Linq;
 using System.Text;
 using System.Text.Json;
-using DiscordChatExporter.Domain.Internal.Extensions;
+using JsonExtensions.Reading;
 using Tyrrrz.Extensions;

 namespace DiscordChatExporter.Domain.Discord.Models
@@ -1,18 +1,19 @@
 using System.Text.Json;
 using DiscordChatExporter.Domain.Discord.Models.Common;
+using DiscordChatExporter.Domain.Utilities;

 namespace DiscordChatExporter.Domain.Discord.Models
 {
    // https://discord.com/developers/docs/resources/guild#guild-object
    public partial class Guild : IHasId
    {
-        public string Id { get; }
+        public Snowflake Id { get; }

        public string Name { get; }

        public string IconUrl { get; }

-        public Guild(string id, string name, string iconUrl)
+        public Guild(Snowflake id, string name, string iconUrl)
        {
            Id = id;
            Name = name;
@@ -24,18 +25,17 @@ namespace DiscordChatExporter.Domain.Discord.Models

    public partial class Guild
    {
-        public static Guild DirectMessages { get; } =
-            new Guild("@me", "Direct Messages", GetDefaultIconUrl());
+        public static Guild DirectMessages { get; } = new(Snowflake.Zero, "Direct Messages", GetDefaultIconUrl());

        private static string GetDefaultIconUrl() =>
            "https://cdn.discordapp.com/embed/avatars/0.png";

-        private static string GetIconUrl(string id, string iconHash) =>
+        private static string GetIconUrl(Snowflake id, string iconHash) =>
            $"https://cdn.discordapp.com/icons/{id}/{iconHash}.png";

        public static Guild Parse(JsonElement json)
        {
-            var id = json.GetProperty("id").GetString();
+            var id = json.GetProperty("id").GetString().Pipe(Snowflake.Parse);
            var name = json.GetProperty("name").GetString();
            var iconHash = json.GetProperty("icon").GetString();

@@ -3,22 +3,23 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text.Json;
 using DiscordChatExporter.Domain.Discord.Models.Common;
-using DiscordChatExporter.Domain.Internal.Extensions;
+using DiscordChatExporter.Domain.Utilities;
+using JsonExtensions.Reading;

 namespace DiscordChatExporter.Domain.Discord.Models
 {
    // https://discord.com/developers/docs/resources/guild#guild-member-object
    public partial class Member : IHasId
    {
-        public string Id => User.Id;
+        public Snowflake Id => User.Id;

        public User User { get; }

        public string Nick { get; }

-        public IReadOnlyList<string> RoleIds { get; }
+        public IReadOnlyList<Snowflake> RoleIds { get; }

-        public Member(User user, string? nick, IReadOnlyList<string> roleIds)
+        public Member(User user, string? nick, IReadOnlyList<Snowflake> roleIds)
        {
            User = user;
            Nick = nick ?? user.Name;
@@ -30,8 +31,7 @@ namespace DiscordChatExporter.Domain.Discord.Models

    public partial class Member
    {
-        public static Member CreateForUser(User user) =>
-            new Member(user, null, Array.Empty<string>());
+        public static Member CreateForUser(User user) => new(user, null, Array.Empty<Snowflake>());

        public static Member Parse(JsonElement json)
        {
@@ -39,8 +39,8 @@ namespace DiscordChatExporter.Domain.Discord.Models
            var nick = json.GetPropertyOrNull("nick")?.GetString();

            var roleIds =
-                json.GetPropertyOrNull("roles")?.EnumerateArray().Select(j => j.GetString()).ToArray() ??
-                Array.Empty<string>();
+                json.GetPropertyOrNull("roles")?.EnumerateArray().Select(j => j.GetString().Pipe(Snowflake.Parse)).ToArray() ??
+                Array.Empty<Snowflake>();

            return new Member(
                user,
@@ -3,27 +3,29 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text.Json;
 using DiscordChatExporter.Domain.Discord.Models.Common;
-using DiscordChatExporter.Domain.Internal.Extensions;
+using DiscordChatExporter.Domain.Utilities;
+using JsonExtensions.Reading;

 namespace DiscordChatExporter.Domain.Discord.Models
 {
    // https://discord.com/developers/docs/resources/channel#message-object-message-types
    public enum MessageType
    {
-        Default,
-        RecipientAdd,
-        RecipientRemove,
-        Call,
-        ChannelNameChange,
-        ChannelIconChange,
-        ChannelPinnedMessage,
-        GuildMemberJoin
+        Default = 0,
+        RecipientAdd = 1,
+        RecipientRemove = 2,
+        Call = 3,
+        ChannelNameChange = 4,
+        ChannelIconChange = 5,
+        ChannelPinnedMessage = 6,
+        GuildMemberJoin = 7,
+        Reply = 19
    }

    // https://discord.com/developers/docs/resources/channel#message-object
    public partial class Message : IHasId
    {
-        public string Id { get; }
+        public Snowflake Id { get; }

        public MessageType Type { get; }

@@ -33,6 +35,8 @@ namespace DiscordChatExporter.Domain.Discord.Models

        public DateTimeOffset? EditedTimestamp { get; }

+        public DateTimeOffset? CallEndedTimestamp { get; }
+
        public bool IsPinned { get; }

        public string Content { get; }
@@ -45,30 +49,40 @@ namespace DiscordChatExporter.Domain.Discord.Models

        public IReadOnlyList<User> MentionedUsers { get; }

+        public MessageReference? Reference { get; }
+
+        public Message? ReferencedMessage { get; }
+
        public Message(
-            string id,
+            Snowflake id,
            MessageType type,
            User author,
            DateTimeOffset timestamp,
            DateTimeOffset? editedTimestamp,
+            DateTimeOffset? callEndedTimestamp,
            bool isPinned,
            string content,
            IReadOnlyList<Attachment> attachments,
            IReadOnlyList<Embed> embeds,
            IReadOnlyList<Reaction> reactions,
-            IReadOnlyList<User> mentionedUsers)
+            IReadOnlyList<User> mentionedUsers,
+            MessageReference? messageReference,
+            Message? referencedMessage)
        {
            Id = id;
            Type = type;
            Author = author;
            Timestamp = timestamp;
            EditedTimestamp = editedTimestamp;
+            CallEndedTimestamp = callEndedTimestamp;
            IsPinned = isPinned;
            Content = content;
            Attachments = attachments;
            Embeds = embeds;
            Reactions = reactions;
            MentionedUsers = mentionedUsers;
+            Reference = messageReference;
+            ReferencedMessage = referencedMessage;
        }

        public override string ToString() => Content;
@@ -78,18 +92,22 @@ namespace DiscordChatExporter.Domain.Discord.Models
    {
        public static Message Parse(JsonElement json)
        {
-            var id = json.GetProperty("id").GetString();
+            var id = json.GetProperty("id").GetString().Pipe(Snowflake.Parse);
            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 type = (MessageType) json.GetProperty("type").GetInt32();
            var isPinned = json.GetPropertyOrNull("pinned")?.GetBoolean() ?? false;
+            var messageReference = json.GetPropertyOrNull("message_reference")?.Pipe(MessageReference.Parse);
+            var referencedMessage = json.GetPropertyOrNull("referenced_message")?.Pipe(Message.Parse);

            var content = type switch
            {
                MessageType.RecipientAdd => "Added a recipient.",
                MessageType.RecipientRemove => "Removed a recipient.",
-                MessageType.Call => "Started a call.",
+                MessageType.Call =>
+                    $"Started a call that lasted {callEndedTimestamp?.Pipe(t => t - timestamp).Pipe(t => (int) t.TotalMinutes) ?? 0} minutes.",
                MessageType.ChannelNameChange => "Changed the channel name.",
                MessageType.ChannelIconChange => "Changed the channel icon.",
                MessageType.ChannelPinnedMessage => "Pinned a message.",
@@ -119,12 +137,15 @@ namespace DiscordChatExporter.Domain.Discord.Models
                author,
                timestamp,
                editedTimestamp,
+                callEndedTimestamp,
                isPinned,
                content,
                attachments,
                embeds,
                reactions,
-                mentionedUsers
+                mentionedUsers,
+                messageReference,
+                referencedMessage
            );
        }
    }
@@ -0,0 +1,37 @@
+using System.Text.Json;
+using DiscordChatExporter.Domain.Utilities;
+using JsonExtensions.Reading;
+
+namespace DiscordChatExporter.Domain.Discord.Models
+{
+    // https://discord.com/developers/docs/resources/channel#message-object-message-reference-structure
+    public partial class MessageReference
+    {
+        public Snowflake? MessageId { get; }
+
+        public Snowflake? ChannelId { get; }
+
+        public Snowflake? GuildId { get; }
+
+        public MessageReference(Snowflake? messageId, Snowflake? channelId, Snowflake? guildId)
+        {
+            MessageId = messageId;
+            ChannelId = channelId;
+            GuildId = guildId;
+        }
+
+        public override string ToString() => MessageId?.ToString() ?? "<unknown reference>";
+    }
+
+    public partial class MessageReference
+    {
+        public static MessageReference Parse(JsonElement json)
+        {
+            var messageId = json.GetPropertyOrNull("message_id")?.GetString().Pipe(Snowflake.Parse);
+            var channelId = json.GetPropertyOrNull("channel_id")?.GetString().Pipe(Snowflake.Parse);
+            var guildId = json.GetPropertyOrNull("guild_id")?.GetString().Pipe(Snowflake.Parse);
+
+            return new MessageReference(messageId, channelId, guildId);
+        }
+    }
+}
@@ -1,5 +1,5 @@
 using System.Text.Json;
-using DiscordChatExporter.Domain.Internal.Extensions;
+using DiscordChatExporter.Domain.Utilities;

 namespace DiscordChatExporter.Domain.Discord.Models
 {
@@ -1,13 +1,16 @@
 using System.Drawing;
 using System.Text.Json;
+using DiscordChatExporter.Domain.Discord.Models.Common;
 using DiscordChatExporter.Domain.Internal.Extensions;
+using DiscordChatExporter.Domain.Utilities;
+using JsonExtensions.Reading;

 namespace DiscordChatExporter.Domain.Discord.Models
 {
    // https://discord.com/developers/docs/topics/permissions#role-object
-    public partial class Role
+    public partial class Role : IHasId
    {
-        public string Id { get; }
+        public Snowflake Id { get; }

        public string Name { get; }

@@ -15,7 +18,7 @@ namespace DiscordChatExporter.Domain.Discord.Models

        public Color? Color { get; }

-        public Role(string id, string name, int position, Color? color)
+        public Role(Snowflake id, string name, int position, Color? color)
        {
            Id = id;
            Name = name;
@@ -30,7 +33,7 @@ namespace DiscordChatExporter.Domain.Discord.Models
    {
        public static Role Parse(JsonElement json)
        {
-            var id = json.GetProperty("id").GetString();
+            var id = json.GetProperty("id").GetString().Pipe(Snowflake.Parse);
            var name = json.GetProperty("name").GetString();
            var position = json.GetProperty("position").GetInt32();

@@ -1,14 +1,15 @@
 using System;
 using System.Text.Json;
 using DiscordChatExporter.Domain.Discord.Models.Common;
-using DiscordChatExporter.Domain.Internal.Extensions;
+using DiscordChatExporter.Domain.Utilities;
+using JsonExtensions.Reading;

 namespace DiscordChatExporter.Domain.Discord.Models
 {
    // https://discord.com/developers/docs/resources/user#user-object
    public partial class User : IHasId
    {
-        public string Id { get; }
+        public Snowflake Id { get; }

        public bool IsBot { get; }

@@ -20,7 +21,7 @@ namespace DiscordChatExporter.Domain.Discord.Models

        public string AvatarUrl { get; }

-        public User(string id, bool isBot, int discriminator, string name, string avatarUrl)
+        public User(Snowflake id, bool isBot, int discriminator, string name, string avatarUrl)
        {
            Id = id;
            IsBot = isBot;
@@ -37,7 +38,7 @@ namespace DiscordChatExporter.Domain.Discord.Models
        private static string GetDefaultAvatarUrl(int discriminator) =>
            $"https://cdn.discordapp.com/embed/avatars/{discriminator % 5}.png";

-        private static string GetAvatarUrl(string id, string avatarHash)
+        private static string GetAvatarUrl(Snowflake id, string avatarHash)
        {
            // Animated
            if (avatarHash.StartsWith("a_", StringComparison.Ordinal))
@@ -49,7 +50,7 @@ namespace DiscordChatExporter.Domain.Discord.Models

        public static User Parse(JsonElement json)
        {
-            var id = json.GetProperty("id").GetString();
+            var id = json.GetProperty("id").GetString().Pipe(Snowflake.Parse);
            var discriminator = json.GetProperty("discriminator").GetString().Pipe(int.Parse);
            var name = json.GetProperty("username").GetString();
            var avatarHash = json.GetProperty("avatar").GetString();
@@ -0,0 +1,68 @@
+using System;
+using System.Globalization;
+using System.Text.RegularExpressions;
+
+namespace DiscordChatExporter.Domain.Discord
+{
+    public readonly partial struct Snowflake
+    {
+        public ulong Value { get; }
+
+        public Snowflake(ulong value) => Value = value;
+
+        public DateTimeOffset ToDate() =>
+            DateTimeOffset.FromUnixTimeMilliseconds((long) ((Value >> 22) + 1420070400000UL)).ToLocalTime();
+
+        public override string ToString() => Value.ToString(CultureInfo.InvariantCulture);
+    }
+
+    public partial struct Snowflake
+    {
+        public static Snowflake Zero { get; } = new(0);
+
+        public static Snowflake FromDate(DateTimeOffset date)
+        {
+            var value = ((ulong) date.ToUnixTimeMilliseconds() - 1420070400000UL) << 22;
+            return new Snowflake(value);
+        }
+
+        public static Snowflake? TryParse(string? str, IFormatProvider? formatProvider = null)
+        {
+            if (string.IsNullOrWhiteSpace(str))
+                return null;
+
+            // As number
+            if (Regex.IsMatch(str, @"^\d{15,}$") &&
+                ulong.TryParse(str, NumberStyles.Number, formatProvider, out var value))
+            {
+                return new Snowflake(value);
+            }
+
+            // As date
+            if (DateTimeOffset.TryParse(str, formatProvider, DateTimeStyles.None, out var date))
+            {
+                return FromDate(date);
+            }
+
+            return null;
+        }
+
+        public static Snowflake Parse(string str, IFormatProvider? formatProvider) =>
+            TryParse(str, formatProvider) ?? throw new FormatException($"Invalid snowflake: {str}.");
+
+        public static Snowflake Parse(string str) => Parse(str, null);
+    }
+
+    public partial struct Snowflake : IEquatable<Snowflake>
+    {
+        public bool Equals(Snowflake other) => Value == other.Value;
+
+        public override bool Equals(object? obj) => obj is Snowflake other && Equals(other);
+
+        public override int GetHashCode() => Value.GetHashCode();
+
+        public static bool operator ==(Snowflake left, Snowflake right) => left.Equals(right);
+
+        public static bool operator !=(Snowflake left, Snowflake right) => !(left == right);
+    }
+}
@@ -1,18 +1,23 @@
 <Project Sdk="Microsoft.NET.Sdk">
-  <Import Project="../DiscordChatExporter.props" />
+
+  <PropertyGroup>
+    <EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
+  </PropertyGroup>

  <ItemGroup>
+    <PackageReference Include="JsonExtensions" Version="1.0.1" />
+    <PackageReference Include="MiniRazor" Version="2.0.3" />
    <PackageReference Include="Polly" Version="7.2.1" />
-    <PackageReference Include="Scriban" Version="2.1.2" />
    <PackageReference Include="Tyrrrz.Extensions" Version="1.6.5" />
  </ItemGroup>

  <ItemGroup>
    <EmbeddedResource Include="Exporting\Writers\Html\Core.css" />
    <EmbeddedResource Include="Exporting\Writers\Html\Dark.css" />
-    <EmbeddedResource Include="Exporting\Writers\Html\LayoutTemplate.html" />
    <EmbeddedResource Include="Exporting\Writers\Html\Light.css" />
-    <EmbeddedResource Include="Exporting\Writers\Html\MessageGroupTemplate.html" />
+    <AdditionalFiles Include="Exporting\Writers\Html\PreambleTemplate.cshtml" IsRazorTemplate="true" />
+    <AdditionalFiles Include="Exporting\Writers\Html\PostambleTemplate.cshtml" IsRazorTemplate="true" />
+    <AdditionalFiles Include="Exporting\Writers\Html\MessageGroupTemplate.cshtml" IsRazorTemplate="true" />
  </ItemGroup>

-</Project>
+</Project>
@@ -46,9 +46,9 @@ Failed to perform an HTTP request.
            return new DiscordChatExporterException(message);
        }

-        internal static DiscordChatExporterException ChannelIsEmpty(string channel)
+        internal static DiscordChatExporterException ChannelIsEmpty()
        {
-            var message = $"Channel '{channel}' contains no messages for the specified period.";
+            var message = $"No messages for the specified period.";
            return new DiscordChatExporterException(message);
        }
    }
@@ -59,7 +59,7 @@ namespace DiscordChatExporter.Domain.Exporting

            // Throw if no messages were exported
            if (!exportedAnything)
-                throw DiscordChatExporterException.ChannelIsEmpty(request.Channel.Name);
+                throw DiscordChatExporterException.ChannelIsEmpty();
        }
    }
 }
@@ -1,9 +1,14 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.Drawing;
 using System.IO;
 using System.Linq;
+using System.Net.Http;
 using System.Threading.Tasks;
+using DiscordChatExporter.Domain.Discord;
 using DiscordChatExporter.Domain.Discord.Models;
+using DiscordChatExporter.Domain.Internal.Extensions;
+using Tyrrrz.Extensions;

 namespace DiscordChatExporter.Domain.Exporting
 {
@@ -30,21 +35,25 @@ namespace DiscordChatExporter.Domain.Exporting
            Channels = channels;
            Roles = roles;

-            _mediaDownloader = new MediaDownloader(request.OutputMediaDirPath);
+            _mediaDownloader = new MediaDownloader(request.OutputMediaDirPath, request.ShouldReuseMedia);
        }

-        public Member? TryGetMember(string id) =>
-            Members.FirstOrDefault(m => m.Id == id);
-
-        public Channel? TryGetChannel(string id) =>
-            Channels.FirstOrDefault(c => c.Id == id);
-
-        public Role? TryGetRole(string id) =>
-            Roles.FirstOrDefault(r => r.Id == id);
-
-        public Color? TryGetUserColor(User user)
+        public string FormatDate(DateTimeOffset date) => Request.DateFormat switch
        {
-            var member = TryGetMember(user.Id);
+            "unix" => date.ToUnixTimeSeconds().ToString(),
+            "unixms" => date.ToUnixTimeMilliseconds().ToString(),
+            var dateFormat => date.ToLocalString(dateFormat)
+        };
+
+        public Member? TryGetMember(Snowflake id) => Members.FirstOrDefault(m => m.Id == id);
+
+        public Channel? TryGetChannel(Snowflake id) => Channels.FirstOrDefault(c => c.Id == id);
+
+        public Role? TryGetRole(Snowflake id) => Roles.FirstOrDefault(r => r.Id == id);
+
+        public Color? TryGetUserColor(Snowflake id)
+        {
+            var member = TryGetMember(id);
            var roles = member?.RoleIds.Join(Roles, i => i, r => r.Id, (_, role) => role);

            return roles?
@@ -54,16 +63,42 @@ namespace DiscordChatExporter.Domain.Exporting
                .FirstOrDefault();
        }

-        // HACK: ConfigureAwait() is crucial here to enable sync-over-async in HtmlMessageWriter
        public async ValueTask<string> ResolveMediaUrlAsync(string url)
        {
            if (!Request.ShouldDownloadMedia)
                return url;

-            var filePath = await _mediaDownloader.DownloadAsync(url).ConfigureAwait(false);
+            try
+            {
+                var filePath = await _mediaDownloader.DownloadAsync(url);

-            // Return relative path so that the output files can be copied around without breaking
-            return Path.GetRelativePath(Request.OutputBaseDirPath, filePath);
+                // We want relative path so that the output files can be copied around without breaking.
+                // Base directory path may be null if the file is stored at the root or relative to working directory.
+                var relativeFilePath = !string.IsNullOrWhiteSpace(Request.OutputBaseDirPath)
+                    ? Path.GetRelativePath(Request.OutputBaseDirPath, filePath)
+                    : filePath;
+
+                // HACK: for HTML, we need to format the URL properly
+                if (Request.Format == ExportFormat.HtmlDark || Request.Format == ExportFormat.HtmlLight)
+                {
+                    // Need to escape each path segment while keeping the directory separators intact
+                    return relativeFilePath
+                        .Split(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar)
+                        .Select(Uri.EscapeDataString)
+                        .JoinToString(Path.AltDirectorySeparatorChar.ToString());
+                }
+
+                return relativeFilePath;
+            }
+            // Try to catch only exceptions related to failed HTTP requests
+            // https://github.com/Tyrrrz/DiscordChatExporter/issues/332
+            // https://github.com/Tyrrrz/DiscordChatExporter/issues/372
+            catch (Exception ex) when (ex is HttpRequestException || ex is 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
+                return url;
+            }
        }
    }
 }
@@ -1,7 +1,10 @@
 using System;
 using System.IO;
 using System.Text;
+using System.Text.RegularExpressions;
+using DiscordChatExporter.Domain.Discord;
 using DiscordChatExporter.Domain.Discord.Models;
+using DiscordChatExporter.Domain.Internal;

 namespace DiscordChatExporter.Domain.Exporting
 {
@@ -21,14 +24,16 @@ namespace DiscordChatExporter.Domain.Exporting

        public ExportFormat Format { get; }

-        public DateTimeOffset? After { get; }
+        public Snowflake? After { get; }

-        public DateTimeOffset? Before { get; }
+        public Snowflake? Before { get; }

        public int? PartitionLimit { get; }

        public bool ShouldDownloadMedia { get; }

+        public bool ShouldReuseMedia { get; }
+
        public string DateFormat { get; }

        public ExportRequest(
@@ -36,10 +41,11 @@ namespace DiscordChatExporter.Domain.Exporting
            Channel channel,
            string outputPath,
            ExportFormat format,
-            DateTimeOffset? after,
-            DateTimeOffset? before,
+            Snowflake? after,
+            Snowflake? before,
            int? partitionLimit,
            bool shouldDownloadMedia,
+            bool shouldReuseMedia,
            string dateFormat)
        {
            Guild = guild;
@@ -50,6 +56,7 @@ namespace DiscordChatExporter.Domain.Exporting
            Before = before;
            PartitionLimit = partitionLimit;
            ShouldDownloadMedia = shouldDownloadMedia;
+            ShouldReuseMedia = shouldReuseMedia;
            DateFormat = dateFormat;

            OutputBaseFilePath = GetOutputBaseFilePath(
@@ -73,9 +80,29 @@ namespace DiscordChatExporter.Domain.Exporting
            Channel channel,
            string outputPath,
            ExportFormat format,
-            DateTimeOffset? after = null,
-            DateTimeOffset? before = null)
+            Snowflake? after = null,
+            Snowflake? before = null)
        {
+
+            // Formats path
+            outputPath = Regex.Replace(outputPath, "%.", m =>
+                PathEx.EscapePath(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 ?? Snowflake.Zero).ToDate().ToString("yyyy-MM-dd"),
+                    "%b" => (before?.ToDate() ?? DateTime.Now).ToString("yyyy-MM-dd"),
+                    "%%" => "%",
+                    _ => m.Value
+                })
+            );
+
            // Output is a directory
            if (Directory.Exists(outputPath) || string.IsNullOrWhiteSpace(Path.GetExtension(outputPath)))
            {
@@ -91,13 +118,13 @@ namespace DiscordChatExporter.Domain.Exporting
            Guild guild,
            Channel channel,
            ExportFormat format,
-            DateTimeOffset? after = null,
-            DateTimeOffset? before = null)
+            Snowflake? after = null,
+            Snowflake? before = null)
        {
            var buffer = new StringBuilder();

            // Guild and channel names
-            buffer.Append($"{guild.Name} - {channel.Category} - {channel.Name} [{channel.Id}]");
+            buffer.Append($"{guild.Name} - {channel.Category.Name} - {channel.Name} [{channel.Id}]");

            // Date range
            if (after != null || before != null)
@@ -107,17 +134,17 @@ namespace DiscordChatExporter.Domain.Exporting
                // Both 'after' and 'before' are set
                if (after != null && before != null)
                {
-                    buffer.Append($"{after:yyyy-MM-dd} to {before:yyyy-MM-dd}");
+                    buffer.Append($"{after?.ToDate():yyyy-MM-dd} to {before?.ToDate():yyyy-MM-dd}");
                }
                // Only 'after' is set
                else if (after != null)
                {
-                    buffer.Append($"after {after:yyyy-MM-dd}");
+                    buffer.Append($"after {after?.ToDate():yyyy-MM-dd}");
                }
                // Only 'before' is set
                else
                {
-                    buffer.Append($"before {before:yyyy-MM-dd}");
+                    buffer.Append($"before {before?.ToDate():yyyy-MM-dd}");
                }

                buffer.Append(")");
@@ -127,8 +154,7 @@ namespace DiscordChatExporter.Domain.Exporting
            buffer.Append($".{format.GetFileExtension()}");

            // Replace invalid chars
-            foreach (var invalidChar in Path.GetInvalidFileNameChars())
-                buffer.Replace(invalidChar, '_');
+            PathEx.EscapePath(buffer);

            return buffer.ToString();
        }
@@ -1,47 +1,106 @@
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 using System.IO;
 using System.Net.Http;
+using System.Security.Cryptography;
+using System.Text;
 using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 using DiscordChatExporter.Domain.Internal;
 using DiscordChatExporter.Domain.Internal.Extensions;
+using DiscordChatExporter.Domain.Utilities;

 namespace DiscordChatExporter.Domain.Exporting
 {
    internal partial class MediaDownloader
    {
-        private readonly HttpClient _httpClient = Singleton.HttpClient;
+        private readonly HttpClient _httpClient;
        private readonly string _workingDirPath;
+        private readonly bool _reuseMedia;

-        private readonly Dictionary<string, string> _mediaPathMap = new Dictionary<string, string>();
+        // URL -> Local file path
+        private readonly Dictionary<string, string> _pathCache = new(StringComparer.Ordinal);

-        public MediaDownloader(string workingDirPath)
+        public MediaDownloader(HttpClient httpClient, string workingDirPath, bool reuseMedia)
        {
+            _httpClient = httpClient;
            _workingDirPath = workingDirPath;
+            _reuseMedia = reuseMedia;
        }

-        // HACK: ConfigureAwait() is crucial here to enable sync-over-async in HtmlMessageWriter
+        public MediaDownloader(string workingDirPath, bool reuseMedia)
+            : this(Http.Client, workingDirPath, reuseMedia) {}
+
        public async ValueTask<string> DownloadAsync(string url)
        {
-            if (_mediaPathMap.TryGetValue(url, out var cachedFilePath))
+            if (_pathCache.TryGetValue(url, out var cachedFilePath))
                return cachedFilePath;

+            var fileName = GetFileNameFromUrl(url);
+            var filePath = Path.Combine(_workingDirPath, fileName);
+
+            // Reuse existing files if we're allowed to
+            if (_reuseMedia && File.Exists(filePath))
+                return _pathCache[url] = filePath;
+
            Directory.CreateDirectory(_workingDirPath);

-            var extension = Path.GetExtension(GetFileNameFromUrl(url));
-            var fileName = $"{Guid.NewGuid()}{extension}";
-            var filePath = Path.Combine(_workingDirPath, fileName);
+            // This catches IOExceptions which is dangerous as we're working also with files
+            await Http.ExceptionPolicy.ExecuteAsync(async () =>
+            {
+                // Download the file
+                using var response = await _httpClient.GetAsync(url);
+                await using (var output = File.Create(filePath))
+                {
+                    await response.Content.CopyToAsync(output);
+                }

-            await _httpClient.DownloadAsync(url, filePath).ConfigureAwait(false);
+                // Try to set the file date according to the last-modified header
+                var lastModified = response.Content.Headers.TryGetValue("Last-Modified")?.Pipe(s =>
+                    DateTimeOffset.TryParse(s, CultureInfo.InvariantCulture, DateTimeStyles.None, out var date)
+                        ? date
+                        : (DateTimeOffset?) null
+                );

-            return _mediaPathMap[url] = filePath;
+                if (lastModified != null)
+                {
+                    File.SetCreationTimeUtc(filePath, lastModified.Value.UtcDateTime);
+                    File.SetLastWriteTimeUtc(filePath, lastModified.Value.UtcDateTime);
+                    File.SetLastAccessTimeUtc(filePath, lastModified.Value.UtcDateTime);
+                }
+            });
+
+            return _pathCache[url] = filePath;
        }
    }

    internal partial class MediaDownloader
    {
-        private static string GetFileNameFromUrl(string url) =>
-            Regex.Match(url, @".+/([^?]*)").Groups[1].Value;
+        private static string GetUrlHash(string url)
+        {
+            using var hash = SHA256.Create();
+
+            var data = hash.ComputeHash(Encoding.UTF8.GetBytes(url));
+            return data.ToHex().Truncate(5); // 5 chars ought to be enough for anybody
+        }
+
+        private static string GetFileNameFromUrl(string url)
+        {
+            var urlHash = GetUrlHash(url);
+
+            // Try to extract 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
+            if (string.IsNullOrWhiteSpace(fileName))
+                return urlHash;
+
+            // Otherwise, use the original file name but inject the hash in the middle
+            var fileNameWithoutExtension = Path.GetFileNameWithoutExtension(fileName);
+            var fileExtension = Path.GetExtension(fileName);
+
+            return PathEx.EscapePath(fileNameWithoutExtension.Truncate(42) + '-' + urlHash + fileExtension);
+        }
    }
-}
+}
@@ -72,7 +72,9 @@ namespace DiscordChatExporter.Domain.Exporting

    internal partial class MessageExporter
    {
-        private static string GetPartitionFilePath(string baseFilePath, int partitionIndex)
+        private static string GetPartitionFilePath(
+            string baseFilePath,
+            int partitionIndex)
        {
            // First partition - don't change file name
            if (partitionIndex <= 0)
@@ -82,16 +84,17 @@ namespace DiscordChatExporter.Domain.Exporting
            var fileNameWithoutExt = Path.GetFileNameWithoutExtension(baseFilePath);
            var fileExt = Path.GetExtension(baseFilePath);
            var fileName = $"{fileNameWithoutExt} [part {partitionIndex + 1}]{fileExt}";
-
-            // Generate new path
            var dirPath = Path.GetDirectoryName(baseFilePath);
-            if (!string.IsNullOrWhiteSpace(dirPath))
-                return Path.Combine(dirPath, fileName);

-            return fileName;
+            return !string.IsNullOrWhiteSpace(dirPath)
+                ? Path.Combine(dirPath, fileName)
+                : fileName;
        }

-        private static MessageWriter CreateMessageWriter(string filePath, ExportFormat format, ExportContext context)
+        private static MessageWriter CreateMessageWriter(
+            string filePath,
+            ExportFormat format,
+            ExportContext context)
        {
            // Stream will be disposed by the underlying writer
            var stream = File.Create(filePath);
@@ -59,7 +59,7 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
        public override async ValueTask WriteMessageAsync(Message message)
        {
            // Author ID
-            await _writer.WriteAsync(CsvEncode(message.Author.Id));
+            await _writer.WriteAsync(CsvEncode(message.Author.Id.ToString()));
            await _writer.WriteAsync(',');

            // Author name
@@ -67,7 +67,7 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
            await _writer.WriteAsync(',');

            // Message timestamp
-            await _writer.WriteAsync(CsvEncode(message.Timestamp.ToLocalString(Context.Request.DateFormat)));
+            await _writer.WriteAsync(CsvEncode(Context.FormatDate(message.Timestamp)));
            await _writer.WriteAsync(',');

            // Message content
@@ -2,31 +2,31 @@

@font-face {
    font-family: Whitney;
-    src: url(https://discord.com/assets/6c6374bad0b0b6d204d8d6dc4a18d820.woff);
+    src: url(https://cdn.jsdelivr.net/gh/Tyrrrz/DiscordFonts@master/whitney-300.woff);
    font-weight: 300;
 }

@font-face {
    font-family: Whitney;
-    src: url(https://discord.com/assets/e8acd7d9bf6207f99350ca9f9e23b168.woff);
+    src: url(https://cdn.jsdelivr.net/gh/Tyrrrz/DiscordFonts@master/whitney-400.woff);
    font-weight: 400;
 }

@font-face {
    font-family: Whitney;
-    src: url(https://discord.com/assets/3bdef1251a424500c1b3a78dea9b7e57.woff);
+    src: url(https://cdn.jsdelivr.net/gh/Tyrrrz/DiscordFonts@master/whitney-500.woff);
    font-weight: 500;
 }

@font-face {
    font-family: Whitney;
-    src: url(https://discord.com/assets/be0060dafb7a0e31d2a1ca17c0708636.woff);
+    src: url(https://cdn.jsdelivr.net/gh/Tyrrrz/DiscordFonts@master/whitney-600.woff);
    font-weight: 600;
 }

@font-face {
    font-family: Whitney;
-    src: url(https://discord.com/assets/8e12fb4f14d9c4592eb8ec9f22337b04.woff);
+    src: url(https://cdn.jsdelivr.net/gh/Tyrrrz/DiscordFonts@master/whitney-700.woff);
    font-weight: 700;
 }

@@ -49,13 +49,18 @@ img {

 .markdown {
    max-width: 100%;
-    white-space: pre-wrap;
    line-height: 1.3;
    overflow-wrap: break-word;
 }

+.preserve-whitespace {
+    white-space: pre-wrap;
+}
+
 .spoiler {
-    width: fit-content;
+    /* width: fit-content; */
+    display: inline-block;
+    /* This is more consistent across browsers, the old attribute worked well under Chrome but not FireFox. */
 }

 .spoiler--hidden {
@@ -84,7 +89,7 @@ img {
    box-shadow: 0 0 1px 1px rgba(0, 0, 0, 0.1);
 }

-.spoiler--hidden .spoiler-image img {
+.spoiler--hidden .spoiler-image * {
    filter: blur(44px);
 }

@@ -97,7 +102,7 @@ img {
    top: 50%;
    transform: translate(-50%, -50%);
    font-weight: 600;
-    padding: 0.5em 0.7em;
+    padding: 100%;
    border-radius: 20px;
    letter-spacing: 0.05em;
    font-size: 0.9em;
@@ -202,6 +207,58 @@ img {
    grid-template-columns: auto 1fr;
 }

+.chatlog__reference-symbol {
+    grid-column: 1;
+    border-style: solid;
+    border-width: 2px 0 0 2px;
+    border-radius: 8px 0 0 0;
+    margin-left: 16px;
+    margin-top: 8px;
+}
+
+.chatlog__reference {
+    display: flex;
+    grid-column: 2;
+    margin-left: 1.2em;
+    margin-bottom: 0.25em;
+    font-size: 0.875em;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    align-items: center;
+}
+
+.chatlog__reference-avatar {
+    border-radius: 50%;
+    height: 16px;
+    width: 16px;
+    margin-right: 0.25em;
+}
+
+.chatlog__reference-name {
+    margin-right: 0.25em;
+    font-weight: 600;
+}
+
+.chatlog__reference-link {
+    flex-grow: 1;
+    overflow: hidden;
+    text-overflow: ellipsis;
+}
+
+.chatlog__reference-link:hover {
+    text-decoration: none;
+}
+
+.chatlog__reference-content > * {
+    display: inline;
+}
+
+.chatlog__reference-edited-timestamp {
+    margin-left: 0.25em;
+    font-size: 0.8em;
+}
+
 .chatlog__author-avatar-container {
    grid-column: 1;
    width: 40px;
@@ -257,6 +314,53 @@ img {
    border-radius: 3px;
 }

+.chatlog__attachment-container {
+    height: 40px;
+    width: 100%;
+    max-width: 520px;
+    padding: 10px;
+    border: 1px solid;
+    border-radius: 3px;
+    overflow: hidden;
+}
+
+.chatlog__attachment-icon {
+    float: left;
+    height: 100%;
+    margin-right: 10px;
+}
+
+.chatlog__attachment-icon > .a {
+    fill: #f4f5fb;
+    d: path("M50,935a25,25,0,0,1-25-25V50A25,25,0,0,1,50,25H519.6L695,201.32V910a25,25,0,0,1-25,25Z");
+}
+
+.chatlog__attachment-icon > .b {
+    fill: #7789c4;
+    d: path("M509.21,50,670,211.63V910H50V50H509.21M530,0H50A50,50,0,0,0,0,50V910a50,50,0,0,0,50,50H670a50,50,0,0,0,50-50h0V191Z");
+}
+
+.chatlog__attachment-icon > .c {
+    fill: #f4f5fb;
+    d: path("M530,215a25,25,0,0,1-25-25V50a25,25,0,0,1,16.23-23.41L693.41,198.77A25,25,0,0,1,670,215Z");
+}
+
+.chatlog__attachment-icon > .d {
+    fill: #7789c4;
+    d: path("M530,70.71,649.29,190H530V70.71M530,0a50,50,0,0,0-50,50V190a50,50,0,0,0,50,50H670a50,50,0,0,0,50-50Z");
+}
+
+.chatlog__attachment-filesize {
+    color: #72767d;
+    font-size: 12px;
+}
+
+.chatlog__attachment-filename {
+    overflow: hidden;
+    white-space: nowrap;
+    text-overflow: ellipsis;
+}
+
 .chatlog__embed {
    display: flex;
    margin-top: 0.3em;
@@ -46,6 +46,26 @@ a {
    border-color: rgba(255, 255, 255, 0.1);
 }

+.chatlog__reference-symbol {
+    border-color: #4f545c;
+}
+
+.chatlog__reference {
+    color: #b5b6b8;
+}
+
+.chatlog__reference-link {
+    color: #b5b6b8;
+}
+
+.chatlog__reference-link:hover {
+    color: #ffffff;
+}
+
+.chatlog__reference-edited-timestamp {
+    color: rgba(255, 255, 255, 0.2);
+}
+
 .chatlog__author-name {
    color: #ffffff;
 }
@@ -62,6 +82,11 @@ a {
    background-color: rgba(249, 168, 37, 0.05);
 }

+.chatlog__attachment-container {
+    background-color: #2f3136;
+    border-color: #292b2f;
+}
+
 .chatlog__edited-timestamp {
    color: rgba(255, 255, 255, 0.2);
 }
@@ -1,96 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-
-<head>
-    {{~ # Metadata ~}}
-    <title>{{ Context.Request.Guild.Name | html.escape }} - {{ Context.Request.Channel.Name | html.escape }}</title>
-    <meta charset="utf-8">
-    <meta name="viewport" content="width=device-width">
-
-    {{~ # Styles ~}}
-    <style>
-        {{ CoreStyleSheet }}
-    </style>
-    <style>
-        {{ ThemeStyleSheet }}
-    </style>
-
-    {{~ # Syntax highlighting ~}}
-    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.15.6/styles/{{HighlightJsStyleName}}.min.css">
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.15.6/highlight.min.js"></script>
-    <script>
-        document.addEventListener('DOMContentLoaded', () => {
-            document.querySelectorAll('.pre--multiline').forEach(block => hljs.highlightBlock(block));
-        });
-    </script>
-
-    {{~ # Local scripts ~}}
-    <script>
-        function scrollToMessage(event, id) {
-            var element = document.getElementById('message-' + id);
-
-            if (element) {
-                event.preventDefault();
-
-                element.classList.add('chatlog__message--highlighted');
-
-                window.scrollTo({
-                    top: element.getBoundingClientRect().top - document.body.getBoundingClientRect().top - (window.innerHeight / 2),
-                    behavior: 'smooth'
-                });
-
-                window.setTimeout(function() {
-                    element.classList.remove('chatlog__message--highlighted');
-                }, 2000);
-            }
-        }
-
-        function showSpoiler(event, element) {
-            if (element && element.classList.contains('spoiler--hidden')) {
-                event.preventDefault();
-                element.classList.remove('spoiler--hidden');
-            }
-        }
-    </script>
-</head>
-<body>
-
-{{~ # Preamble ~}}
-<div class="preamble">
-    <div class="preamble__guild-icon-container">
-        <img class="preamble__guild-icon" src="{{ Context.Request.Guild.IconUrl | ResolveUrl }}" alt="Guild icon">
-    </div>
-    <div class="preamble__entries-container">
-        <div class="preamble__entry">{{ Context.Request.Guild.Name | html.escape }}</div>
-        <div class="preamble__entry">{{ Context.Request.Channel.Category | html.escape }} / {{ Context.Request.Channel.Name | html.escape }}</div>
-
-        {{~ if Context.Request.Channel.Topic ~}}
-        <div class="preamble__entry preamble__entry--small">{{ Context.Request.Channel.Topic | html.escape }}</div>
-        {{~ end ~}}
-
-        {{~ if Context.Request.After || Context.Request.Before ~}}
-        <div class="preamble__entry preamble__entry--small">
-            {{~ if Context.Request.After && Context.Request.Before ~}}
-                Between {{ Context.Request.After | FormatDate | html.escape }} and {{ Context.Request.Before | FormatDate | html.escape }}
-            {{~ else if Context.Request.After ~}}
-                After {{ Context.Request.After | FormatDate | html.escape }}
-            {{~ else if Context.Request.Before ~}}
-                Before {{ Context.Request.Before | FormatDate | html.escape }}
-            {{~ end ~}}
-        </div>
-        {{~ end ~}}
-    </div>
-</div>
-
-{{~ # Log ~}}
-<div class="chatlog">
-    {{~ %SPLIT% ~}}
-</div>
-
-{{~ # Postamble ~}}
-<div class="postamble">
-    <div class="postamble__entry">Exported {{ MessageCount | object.format "N0" }} message(s)</div>
-</div>
-
-</body>
-</html>
@@ -0,0 +1,18 @@
+namespace DiscordChatExporter.Domain.Exporting.Writers.Html
+{
+    internal class LayoutTemplateContext
+    {
+        public ExportContext ExportContext { get; }
+
+        public string ThemeName { get; }
+
+        public long MessageCount { get; }
+
+        public LayoutTemplateContext(ExportContext exportContext, string themeName, long messageCount)
+        {
+            ExportContext = exportContext;
+            ThemeName = themeName;
+            MessageCount = messageCount;
+        }
+    }
+}
@@ -47,6 +47,26 @@ a {
    border-color: #eceeef;
 }

+.chatlog__reference-symbol {
+    border-color: #c7ccd1;
+}
+
+.chatlog__reference {
+    color: #5f5f60;
+}
+
+.chatlog__reference-link {
+    color: #5f5f60;
+}
+
+.chatlog__reference-link:hover {
+    color: #2f3136;
+}
+
+.chatlog__reference-edited-timestamp {
+    color: #747f8d;
+}
+
 .chatlog__author-name {
    font-weight: 600;
    color: #2f3136;
@@ -64,6 +84,11 @@ a {
    background-color: rgba(249, 168, 37, 0.05);
 }

+.chatlog__attachment-container {
+    background-color: #f2f3f5;
+    border-color: #ebedef;
+}
+
 .chatlog__edited-timestamp {
    color: #747f8d;
 }
@@ -14,10 +14,21 @@ namespace DiscordChatExporter.Domain.Exporting.Writers.Html

        public IReadOnlyList<Message> Messages { get; }

-        public MessageGroup(User author, DateTimeOffset timestamp, IReadOnlyList<Message> messages)
+        public MessageReference? Reference { get; }
+
+        public Message? ReferencedMessage {get; }
+
+        public MessageGroup(
+            User author,
+            DateTimeOffset timestamp,
+            MessageReference? reference,
+            Message? referencedMessage,
+            IReadOnlyList<Message> messages)
        {
            Author = author;
            Timestamp = timestamp;
+            Reference = reference;
+            ReferencedMessage = referencedMessage;
            Messages = messages;
        }
    }
@@ -25,9 +36,10 @@ namespace DiscordChatExporter.Domain.Exporting.Writers.Html
    internal partial class MessageGroup
    {
        public static bool CanJoin(Message message1, Message message2) =>
-            string.Equals(message1.Author.Id, message2.Author.Id, StringComparison.Ordinal) &&
+            message1.Author.Id == message2.Author.Id &&
            string.Equals(message1.Author.FullName, message2.Author.FullName, StringComparison.Ordinal) &&
-            (message2.Timestamp - message1.Timestamp).Duration().TotalMinutes <= 7;
+            (message2.Timestamp - message1.Timestamp).Duration().TotalMinutes <= 7 &&
+            message2.Reference is null;

        public static MessageGroup Join(IReadOnlyList<Message> messages)
        {
@@ -36,6 +48,8 @@ namespace DiscordChatExporter.Domain.Exporting.Writers.Html
            return new MessageGroup(
                first.Author,
                first.Timestamp,
+                first.Reference,
+                first.ReferencedMessage,
                messages
            );
        }
@@ -0,0 +1,316 @@
+@using System
+@using System.Linq
+@using System.Threading.Tasks
+@namespace DiscordChatExporter.Domain.Exporting.Writers.Html
+@inherits MiniRazor.TemplateBase<DiscordChatExporter.Domain.Exporting.Writers.Html.MessageGroupTemplateContext>
+
+@{
+    string FormatDate(DateTimeOffset date) => Model.ExportContext.FormatDate(date);
+
+    string FormatMarkdown(string markdown) => Model.FormatMarkdown(markdown);
+
+    string FormatEmbedMarkdown(string markdown) => Model.FormatMarkdown(markdown, false);
+
+    ValueTask<string> ResolveUrlAsync(string url) => Model.ExportContext.ResolveMediaUrlAsync(url);
+
+    var userMember = Model.ExportContext.TryGetMember(Model.MessageGroup.Author.Id);
+
+    var userColor = Model.ExportContext.TryGetUserColor(Model.MessageGroup.Author.Id);
+
+    var userColorStyle = userColor != null
+        ? $"color: rgb({userColor?.R},{userColor?.G},{userColor?.B})"
+        : null;
+
+    var userNick = Model.MessageGroup.Author.IsBot
+        ? Model.MessageGroup.Author.Name
+        : userMember?.Nick ?? Model.MessageGroup.Author.Name;
+
+    var referencedUserMember = Model.MessageGroup.ReferencedMessage != null
+        ? Model.ExportContext.TryGetMember(Model.MessageGroup.ReferencedMessage.Author.Id)
+        : null;
+
+    var referencedUserColor = Model.MessageGroup.ReferencedMessage != null
+        ? Model.ExportContext.TryGetUserColor(Model.MessageGroup.ReferencedMessage.Author.Id)
+        : null;
+
+    var referencedUserColorStyle = referencedUserColor != null
+        ? $"color: rgb({referencedUserColor?.R},{referencedUserColor?.G},{referencedUserColor?.B})"
+        : null;
+
+    var referencedUserNick = Model.MessageGroup.ReferencedMessage != null
+        ? Model.MessageGroup.ReferencedMessage.Author.IsBot
+            ? Model.MessageGroup.ReferencedMessage.Author.Name
+            : referencedUserMember?.Nick ?? Model.MessageGroup.ReferencedMessage.Author.Name
+        : null;
+}
+
+<div class="chatlog__message-group">
+    @if (Model.MessageGroup.Reference != null)
+    {
+        <div class="chatlog__reference-symbol">
+        </div>
+        <div class="chatlog__reference">
+            @if (Model.MessageGroup.ReferencedMessage != null)
+            {
+                <img class="chatlog__reference-avatar" src="@await ResolveUrlAsync(Model.MessageGroup.ReferencedMessage.Author.AvatarUrl)" alt="Avatar">
+                <span class="chatlog__reference-name" title="@Model.MessageGroup.ReferencedMessage.Author.FullName" style="@referencedUserColorStyle">@referencedUserNick</span>
+                <a class="chatlog__reference-link" href="#" onclick="scrollToMessage(event, '@Model.MessageGroup.ReferencedMessage.Id')">
+                    <span class="chatlog__reference-content">
+                        @if (!string.IsNullOrWhiteSpace(Model.MessageGroup.ReferencedMessage.Content))
+                        {
+                            @Raw(FormatMarkdown(Model.MessageGroup.ReferencedMessage.Content))
+                        }
+                        else
+                        {
+                            <em>Click to see original message</em>
+                        }
+                    </span>
+
+                    @if (Model.MessageGroup.ReferencedMessage.EditedTimestamp != null)
+                    {
+                        <span class="chatlog__reference-edited-timestamp" title="@FormatDate(Model.MessageGroup.ReferencedMessage.EditedTimestamp.Value)">(edited)</span>
+                    }
+                </a>
+            }
+            else
+            {
+                <span class="chatlog__reference-unknown">
+                    Original message was deleted.
+                </span>
+            }
+        </div>
+    }
+    <div class="chatlog__author-avatar-container">
+        <img class="chatlog__author-avatar" src="@await ResolveUrlAsync(Model.MessageGroup.Author.AvatarUrl)" alt="Avatar">
+    </div>
+    <div class="chatlog__messages">
+        <span class="chatlog__author-name" title="@Model.MessageGroup.Author.FullName" data-user-id="@Model.MessageGroup.Author.Id" style="@userColorStyle">@userNick</span>
+
+        @if (Model.MessageGroup.Author.IsBot)
+        {
+            <span class="chatlog__bot-tag">BOT</span>
+        }
+
+        <span class="chatlog__timestamp">@FormatDate(Model.MessageGroup.Timestamp)</span>
+
+        @foreach (var message in Model.MessageGroup.Messages)
+        {
+            var isPinnedStyle = message.IsPinned ? "chatlog__message--pinned" : null;
+
+            <div class="chatlog__message @isPinnedStyle" data-message-id="@message.Id" id="message-@message.Id">
+                @if (!string.IsNullOrWhiteSpace(message.Content) || message.EditedTimestamp != null)
+                {
+                    <div class="chatlog__content">
+                        <div class="markdown">
+                            <span class="preserve-whitespace">@Raw(FormatMarkdown(message.Content))</span>
+
+                            @if (message.EditedTimestamp != null)
+                            {
+                                <span class="chatlog__edited-timestamp" title="@FormatDate(message.EditedTimestamp.Value)">(edited)</span>
+                            }
+                        </div>
+                    </div>
+                }
+
+                @foreach (var attachment in message.Attachments)
+                {
+                    <div class="chatlog__attachment">
+                        <div class="@(attachment.IsSpoiler ? "spoiler spoiler--hidden" : "")" onclick="@(attachment.IsSpoiler ? "showSpoiler(event, this)" : "")">
+                            <div class="@(attachment.IsSpoiler ? "spoiler-image" : "")">
+                                @if (attachment.IsImage)
+                                {
+                                    <a href="@await ResolveUrlAsync(attachment.Url)">
+                                        <img class="chatlog__attachment-thumbnail" src="@await ResolveUrlAsync(attachment.Url)" alt="Image attachment" title="@($"Image: {attachment.FileName} ({attachment.FileSize})")">
+                                    </a>
+                                }
+                                else if (attachment.IsVideo)
+                                {
+                                    <video controls class="chatlog__attachment-thumbnail">
+                                        <source src="@await ResolveUrlAsync(attachment.Url)" alt="Video attachment" title="@($"Video: {attachment.FileName} ({attachment.FileSize})")">
+                                    </video>
+                                }
+                                else if (attachment.IsAudio)
+                                {
+                                    <audio controls class="chatlog__attachment-thumbnail">
+                                        <source src="@await ResolveUrlAsync(attachment.Url)" alt="Audio attachment" title="@($"Audio: {attachment.FileName} ({attachment.FileSize})")">
+                                    </audio>
+                                }
+                                else
+                                {
+                                    <div class="chatlog__attachment-container">
+                                        <svg class="chatlog__attachment-icon" viewBox="0 0 720 960">
+                                            <path class="a"/>
+                                            <path class="b"/>
+                                            <path class="c"/>
+                                            <path class="d"/>
+                                        </svg>
+                                        <div class="chatlog__attachment-filename">
+                                            <a href="@await ResolveUrlAsync(attachment.Url)">
+                                                @attachment.FileName
+                                            </a>
+                                        </div>
+                                        <div class="chatlog__attachment-filesize">
+                                            @attachment.FileSize
+                                        </div>
+                                    </div>
+                                }
+                            </div>
+                        </div>
+                    </div>
+                }
+
+                @foreach (var embed in message.Embeds)
+                {
+                    <div class="chatlog__embed">
+                        @if (embed.Color != null)
+                        {
+                            var embedColorStyle = $"background-color: rgba({embed.Color?.R},{embed.Color?.G},{embed.Color?.B},{embed.Color?.A})";
+                            <div class="chatlog__embed-color-pill" style="@embedColorStyle"></div>
+                        }
+                        else
+                        {
+                            <div class="chatlog__embed-color-pill chatlog__embed-color-pill--default"></div>
+                        }
+
+                        <div class="chatlog__embed-content-container">
+                            <div class="chatlog__embed-content">
+                                <div class="chatlog__embed-text">
+                                    @if (embed.Author != null)
+                                    {
+                                        <div class="chatlog__embed-author">
+                                            @if (!string.IsNullOrWhiteSpace(embed.Author.IconUrl))
+                                            {
+                                                <img class="chatlog__embed-author-icon" src="@await ResolveUrlAsync(embed.Author.IconUrl)" alt="Author icon">
+                                            }
+
+                                            @if (!string.IsNullOrWhiteSpace(embed.Author.Name))
+                                            {
+                                                <span class="chatlog__embed-author-name">
+                                                    @if (!string.IsNullOrWhiteSpace(embed.Author.Url))
+                                                    {
+                                                        <a class="chatlog__embed-author-name-link" href="@embed.Author.Url">@embed.Author.Name</a>
+                                                    }
+                                                    else
+                                                    {
+                                                        @embed.Author.Name
+                                                    }
+                                                </span>
+                                            }
+                                        </div>
+                                    }
+
+                                    @if (!string.IsNullOrWhiteSpace(embed.Title))
+                                    {
+                                        <div class="chatlog__embed-title">
+                                            @if (!string.IsNullOrWhiteSpace(embed.Url))
+                                            {
+                                                <a class="chatlog__embed-title-link" href="@embed.Url">
+                                                    <div class="markdown preserve-whitespace">@Raw(FormatEmbedMarkdown(embed.Title))</div>
+                                                </a>
+                                            }
+                                            else
+                                            {
+                                                <div class="markdown preserve-whitespace">@Raw(FormatEmbedMarkdown(embed.Title))</div>
+                                            }
+                                        </div>
+                                    }
+
+                                    @if (!string.IsNullOrWhiteSpace(embed.Description))
+                                    {
+                                        <div class="chatlog__embed-description">
+                                            <div class="markdown preserve-whitespace">@Raw(FormatEmbedMarkdown(embed.Description))</div>
+                                        </div>
+                                    }
+
+                                    @if (embed.Fields.Any())
+                                    {
+                                        <div class="chatlog__embed-fields">
+                                            @foreach (var field in embed.Fields)
+                                            {
+                                                var isInlineStyle = field.IsInline ? "chatlog__embed-field--inline" : null;
+
+                                                <div class="chatlog__embed-field @isInlineStyle">
+                                                    @if (!string.IsNullOrWhiteSpace(field.Name))
+                                                    {
+                                                        <div class="chatlog__embed-field-name">
+                                                            <div class="markdown preserve-whitespace">@Raw(FormatEmbedMarkdown(field.Name))</div>
+                                                        </div>
+                                                    }
+
+                                                    @if (!string.IsNullOrWhiteSpace(field.Value))
+                                                    {
+                                                        <div class="chatlog__embed-field-value">
+                                                            <div class="markdown preserve-whitespace">@Raw(FormatEmbedMarkdown(field.Value))</div>
+                                                        </div>
+                                                    }
+                                                </div>
+                                            }
+                                        </div>
+                                    }
+                                </div>
+
+                                @if (embed.Thumbnail != null)
+                                {
+                                    <div class="chatlog__embed-thumbnail-container">
+                                        <a class="chatlog__embed-thumbnail-link" href="@await ResolveUrlAsync(embed.Thumbnail.Url)">
+                                            <img class="chatlog__embed-thumbnail" src="@await ResolveUrlAsync(embed.Thumbnail.Url)" alt="Thumbnail">
+                                        </a>
+                                    </div>
+                                }
+                            </div>
+
+                            @if (embed.Image != null)
+                            {
+                                <div class="chatlog__embed-image-container">
+                                    <a class="chatlog__embed-image-link" href="@await ResolveUrlAsync(embed.Image.Url)">
+                                        <img class="chatlog__embed-image" src="@await ResolveUrlAsync(embed.Image.Url)" alt="Image">
+                                    </a>
+                                </div>
+                            }
+
+                            @if (embed.Footer != null || embed.Timestamp != null)
+                            {
+                                <div class="chatlog__embed-footer">
+                                    @if (!string.IsNullOrWhiteSpace(embed.Footer?.IconUrl))
+                                    {
+                                        <img class="chatlog__embed-footer-icon" src="@await ResolveUrlAsync(embed.Footer.IconUrl)" alt="Footer icon">
+                                    }
+
+                                    <span class="chatlog__embed-footer-text">
+                                        @if (!string.IsNullOrWhiteSpace(embed.Footer?.Text))
+                                        {
+                                            @embed.Footer.Text
+                                        }
+
+                                        @if (!string.IsNullOrWhiteSpace(embed.Footer?.Text) && embed.Timestamp != null)
+                                        {
+                                            @(" • ")
+                                        }
+
+                                        @if (embed.Timestamp != null)
+                                        {
+                                            @FormatDate(embed.Timestamp.Value)
+                                        }
+                                    </span>
+                                </div>
+                            }
+                        </div>
+                    </div>
+                }
+
+                @if (message.Reactions.Any())
+                {
+                    <div class="chatlog__reactions">
+                        @foreach (var reaction in message.Reactions)
+                        {
+                            <div class="chatlog__reaction">
+                                <img class="emoji emoji--small" alt="@reaction.Emoji.Name" title="@reaction.Emoji.Name" src="@await ResolveUrlAsync(reaction.Emoji.ImageUrl)">
+                                <span class="chatlog__reaction-count">@reaction.Count</span>
+                            </div>
+                        }
+                    </div>
+                }
+            </div>
+        }
+    </div>
+</div>
@@ -1,184 +0,0 @@
-<div class="chatlog__message-group">
-    {{~ # Avatar ~}}
-    <div class="chatlog__author-avatar-container">
-        <img class="chatlog__author-avatar" src="{{ MessageGroup.Author.AvatarUrl | ResolveUrl }}" alt="Avatar">
-    </div>
-    <div class="chatlog__messages">
-        {{~ # Author name and timestamp ~}}
-        {{~ userColor = TryGetUserColor MessageGroup.Author | FormatColorRgb ~}}
-        <span class="chatlog__author-name" title="{{ MessageGroup.Author.FullName | html.escape }}" data-user-id="{{ MessageGroup.Author.Id | html.escape }}" {{ if userColor }} style="color: {{ userColor }}" {{ end }}>{{ (TryGetUserNick MessageGroup.Author ?? MessageGroup.Author.Name) | html.escape }}</span>
-
-        {{~ # Bot tag ~}}
-        {{~ if MessageGroup.Author.IsBot ~}}
-        <span class="chatlog__bot-tag">BOT</span>
-        {{~ end ~}}
-
-        <span class="chatlog__timestamp">{{ MessageGroup.Timestamp | FormatDate | html.escape }}</span>
-
-        {{~ # Messages ~}}
-        {{~ for message in MessageGroup.Messages ~}}
-            <div class="chatlog__message {{ if message.IsPinned }}chatlog__message--pinned{{ end }}" data-message-id="{{ message.Id }}" id="message-{{ message.Id }}">
-            {{~ # Content ~}}
-            {{~ if message.Content ~}}
-                <div class="chatlog__content">
-                    <div class="markdown">
-                        {{- message.Content | FormatMarkdown -}}
-
-                        {{- # Edited timestamp -}}
-                        {{- if message.EditedTimestamp -}}
-                            {{-}}<span class="chatlog__edited-timestamp" title="{{ message.EditedTimestamp | FormatDate | html.escape }}">(edited)</span>{{-}}
-                        {{- end -}}
-                    </div>
-                </div>
-            {{~ end ~}}
-
-            {{~ # Attachments ~}}
-            {{~ for attachment in message.Attachments ~}}
-                <div class="chatlog__attachment">
-                    {{ # Spoiler image }}
-                    {{~ if attachment.IsSpoiler ~}}
-                    <div class="spoiler spoiler--hidden" onclick="showSpoiler(event, this)">
-                        <div class="spoiler-image">
-                            <a href="{{ attachment.Url | ResolveUrl }}">
-                                <img class="chatlog__attachment-thumbnail" src="{{ attachment.Url | ResolveUrl }}" alt="Attachment">
-                            </a>
-                        </div>
-                    </div>
-                    {{~ else ~}}
-                    <a href="{{ attachment.Url | ResolveUrl }}">
-                        {{ # Non-spoiler image }}
-                        {{~ if attachment.IsImage ~}}
-                            <img class="chatlog__attachment-thumbnail" src="{{ attachment.Url | ResolveUrl }}" alt="Attachment">
-                        {{~ # Non-image ~}}
-                        {{~ else ~}}
-                            Attachment: {{ attachment.FileName }} ({{ attachment.FileSize }})
-                        {{~ end ~}}
-                    </a>
-                    {{~ end ~}}
-                </div>
-            {{~ end ~}}
-
-            {{~ # Embeds ~}}
-            {{~ for embed in message.Embeds ~}}
-            <div class="chatlog__embed">
-                {{~ if embed.Color ~}}
-                <div class="chatlog__embed-color-pill" style="background-color: rgba({{ embed.Color.R }},{{ embed.Color.G }},{{ embed.Color.B }},{{ embed.Color.A }})"></div>
-                {{~ else ~}}
-                <div class="chatlog__embed-color-pill chatlog__embed-color-pill--default"></div>
-                {{~ end ~}}
-                <div class="chatlog__embed-content-container">
-                    <div class="chatlog__embed-content">
-                        <div class="chatlog__embed-text">
-                            {{~ # Author ~}}
-                            {{~ if embed.Author ~}}
-                            <div class="chatlog__embed-author">
-                                {{~ if embed.Author.IconUrl ~}}
-                                <img class="chatlog__embed-author-icon" src="{{ embed.Author.IconUrl | ResolveUrl }}" alt="Author icon">
-                                {{~ end ~}}
-
-                                {{~ if embed.Author.Name ~}}
-                                <span class="chatlog__embed-author-name">
-                                    {{~ if embed.Author.Url ~}}
-                                    <a class="chatlog__embed-author-name-link" href="{{ embed.Author.Url }}">{{ embed.Author.Name | html.escape }}</a>
-                                    {{~ else ~}}
-                                    {{ embed.Author.Name | html.escape }}
-                                    {{~ end ~}}
-                                </span>
-                                {{~ end ~}}
-                            </div>
-                            {{~ end ~}}
-
-                            {{~ # Title ~}}
-                            {{~ if embed.Title ~}}
-                            <div class="chatlog__embed-title">
-                                {{~ if embed.Url ~}}
-                                <a class="chatlog__embed-title-link" href="{{ embed.Url }}"><div class="markdown">{{ embed.Title | FormatEmbedMarkdown }}</div></a>
-                                {{~ else ~}}
-                                <div class="markdown">{{ embed.Title | FormatEmbedMarkdown }}</div>
-                                {{~ end ~}}
-                            </div>
-                            {{~ end ~}}
-
-                            {{~ # Description ~}}
-                            {{~ if embed.Description ~}}
-                            <div class="chatlog__embed-description"><div class="markdown">{{ embed.Description | FormatEmbedMarkdown }}</div></div>
-                            {{~ end ~}}
-
-                            {{~ # Fields ~}}
-                            {{~ if embed.Fields | array.size > 0 ~}}
-                            <div class="chatlog__embed-fields">
-                                {{~ for field in embed.Fields ~}}
-                                <div class="chatlog__embed-field {{ if field.IsInline }} chatlog__embed-field--inline {{ end }}">
-                                    {{~ if field.Name ~}}
-                                    <div class="chatlog__embed-field-name"><div class="markdown">{{ field.Name | FormatEmbedMarkdown }}</div></div>
-                                    {{~ end ~}}
-                                    {{~ if field.Value ~}}
-                                    <div class="chatlog__embed-field-value"><div class="markdown">{{ field.Value | FormatEmbedMarkdown }}</div></div>
-                                    {{~ end ~}}
-                                </div>
-                                {{~ end ~}}
-                            </div>
-                            {{~ end ~}}
-                        </div>
-
-                        {{~ # Thumbnail ~}}
-                        {{~ if embed.Thumbnail ~}}
-                        <div class="chatlog__embed-thumbnail-container">
-                            <a class="chatlog__embed-thumbnail-link" href="{{ embed.Thumbnail.Url | ResolveUrl }}">
-                                <img class="chatlog__embed-thumbnail" src="{{ embed.Thumbnail.Url | ResolveUrl }}" alt="Thumbnail">
-                            </a>
-                        </div>
-                        {{~ end ~}}
-                    </div>
-
-                    {{~ # Image ~}}
-                    {{~ if embed.Image ~}}
-                    <div class="chatlog__embed-image-container">
-                        <a class="chatlog__embed-image-link" href="{{ embed.Image.Url | ResolveUrl }}">
-                            <img class="chatlog__embed-image" src="{{ embed.Image.Url | ResolveUrl }}" alt="Image">
-                        </a>
-                    </div>
-                    {{~ end ~}}
-
-                    {{~ # Footer ~}}
-                    {{~ if embed.Footer || embed.Timestamp ~}}
-                    <div class="chatlog__embed-footer">
-                        {{~ if embed.Footer ~}}
-                        {{~ if embed.Footer.Text && embed.Footer.IconUrl ~}}
-                        <img class="chatlog__embed-footer-icon" src="{{ embed.Footer.IconUrl | ResolveUrl }}" alt="Footer icon">
-                        {{~ end ~}}
-                        {{~ end ~}}
-
-                        <span class="chatlog__embed-footer-text">
-                            {{~ if embed.Footer ~}}
-                            {{~ if embed.Footer.Text ~}}
-                            {{ embed.Footer.Text | html.escape }}
-                            {{ if embed.Timestamp }} • {{ end }}
-                            {{~ end ~}}
-                            {{~ end ~}}
-
-                            {{~ if embed.Timestamp ~}}
-                            {{ embed.Timestamp | FormatDate | html.escape }}
-                            {{~ end ~}}
-                        </span>
-                    </div>
-                    {{~ end ~}}
-                </div>
-            </div>
-            {{~ end ~}}
-
-            {{~ # Reactions ~}}
-            {{~ if message.Reactions | array.size > 0 ~}}
-                <div class="chatlog__reactions">
-                    {{~ for reaction in message.Reactions ~}}
-                        <div class="chatlog__reaction">
-                            <img class="emoji emoji--small" alt="{{ reaction.Emoji.Name }}" title="{{ reaction.Emoji.Name }}" src="{{ reaction.Emoji.ImageUrl | ResolveUrl }}">
-                            <span class="chatlog__reaction-count">{{ reaction.Count }}</span>
-                        </div>
-                    {{~ end ~}}
-                </div>
-            {{~ end ~}}
-            </div>
-        {{~ end ~}}
-    </div>
-</div>
@@ -0,0 +1,20 @@
+using DiscordChatExporter.Domain.Exporting.Writers.MarkdownVisitors;
+
+namespace DiscordChatExporter.Domain.Exporting.Writers.Html
+{
+    internal class MessageGroupTemplateContext
+    {
+        public ExportContext ExportContext { get; }
+
+        public MessageGroup MessageGroup { get; }
+
+        public MessageGroupTemplateContext(ExportContext exportContext, MessageGroup messageGroup)
+        {
+            ExportContext = exportContext;
+            MessageGroup = messageGroup;
+        }
+
+        public string FormatMarkdown(string? markdown, bool isJumboAllowed = true) =>
+            HtmlMarkdownVisitor.Format(ExportContext, markdown ?? "", isJumboAllowed);
+    }
+}
@@ -0,0 +1,12 @@
+@namespace DiscordChatExporter.Domain.Exporting.Writers.Html
+@inherits MiniRazor.TemplateBase<DiscordChatExporter.Domain.Exporting.Writers.Html.LayoutTemplateContext>
+
+</div>
+
+<div class="postamble">
+    <div class="postamble__entry">Exported @Model.MessageCount.ToString("N0") message(s)</div>
+</div>
+
+</body>
+
+</html>
@@ -0,0 +1,101 @@
+@using System
+@using System.Threading.Tasks
+@using Tyrrrz.Extensions
+@namespace DiscordChatExporter.Domain.Exporting.Writers.Html
+@inherits MiniRazor.TemplateBase<DiscordChatExporter.Domain.Exporting.Writers.Html.LayoutTemplateContext>
+
+@{
+    string FormatDate(DateTimeOffset date) => Model.ExportContext.FormatDate(date);
+
+    ValueTask<string> ResolveUrlAsync(string url) => Model.ExportContext.ResolveMediaUrlAsync(url);
+
+    string GetStyleSheet(string name) => Model.GetType().Assembly.GetManifestResourceString($"DiscordChatExporter.Domain.Exporting.Writers.Html.{name}.css");
+}
+
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <title>@Model.ExportContext.Request.Guild.Name - @Model.ExportContext.Request.Channel.Name</title>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width">
+
+    <style>
+        @Raw(GetStyleSheet("Core"))
+    </style>
+    <style>
+        @Raw(GetStyleSheet(Model.ThemeName))
+    </style>
+
+    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.15.6/styles/solarized-@(Model.ThemeName.ToLowerInvariant()).min.css">
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.15.6/highlight.min.js"></script>
+    <script>
+        document.addEventListener('DOMContentLoaded', () => {
+            document.querySelectorAll('.pre--multiline').forEach(block => hljs.highlightBlock(block));
+        });
+    </script>
+
+    <script>
+        function scrollToMessage(event, id) {
+            var element = document.getElementById('message-' + id);
+
+            if (element) {
+                event.preventDefault();
+
+                element.classList.add('chatlog__message--highlighted');
+
+                window.scrollTo({
+                    top: element.getBoundingClientRect().top - document.body.getBoundingClientRect().top - (window.innerHeight / 2),
+                    behavior: 'smooth'
+                });
+
+                window.setTimeout(function() {
+                    element.classList.remove('chatlog__message--highlighted');
+                }, 2000);
+            }
+        }
+
+        function showSpoiler(event, element) {
+            if (element && element.classList.contains('spoiler--hidden')) {
+                event.preventDefault();
+                element.classList.remove('spoiler--hidden');
+            }
+        }
+    </script>
+</head>
+<body>
+
+<div class="preamble">
+    <div class="preamble__guild-icon-container">
+        <img class="preamble__guild-icon" src="@await ResolveUrlAsync(Model.ExportContext.Request.Guild.IconUrl)" alt="Guild icon">
+    </div>
+    <div class="preamble__entries-container">
+        <div class="preamble__entry">@Model.ExportContext.Request.Guild.Name</div>
+        <div class="preamble__entry">@Model.ExportContext.Request.Channel.Category / @Model.ExportContext.Request.Channel.Name</div>
+
+        @if (!string.IsNullOrWhiteSpace(Model.ExportContext.Request.Channel.Topic))
+        {
+            <div class="preamble__entry preamble__entry--small">@Model.ExportContext.Request.Channel.Topic</div>
+        }
+
+        @if (Model.ExportContext.Request.After != null || Model.ExportContext.Request.Before != null)
+        {
+            <div class="preamble__entry preamble__entry--small">
+            @if (Model.ExportContext.Request.After != null && Model.ExportContext.Request.Before != null)
+            {
+                @($"Between {FormatDate(Model.ExportContext.Request.After.Value.ToDate())} and {FormatDate(Model.ExportContext.Request.Before.Value.ToDate())}")
+            }
+            else if (Model.ExportContext.Request.After != null)
+            {
+                @($"After {FormatDate(Model.ExportContext.Request.After.Value.ToDate())}")
+            }
+            else if (Model.ExportContext.Request.Before != null)
+            {
+                @($"Before {FormatDate(Model.ExportContext.Request.Before.Value.ToDate())}")
+            }
+            </div>
+        }
+    </div>
+</div>
+
+<div class="chatlog">
@@ -1,30 +1,18 @@
-using System;
-using System.Collections.Generic;
-using System.Drawing;
+using System.Collections.Generic;
 using System.IO;
 using System.Linq;
-using System.Reflection;
 using System.Threading.Tasks;
 using DiscordChatExporter.Domain.Discord.Models;
 using DiscordChatExporter.Domain.Exporting.Writers.Html;
-using DiscordChatExporter.Domain.Exporting.Writers.MarkdownVisitors;
-using DiscordChatExporter.Domain.Internal.Extensions;
-using Scriban;
-using Scriban.Runtime;
-using Tyrrrz.Extensions;

 namespace DiscordChatExporter.Domain.Exporting.Writers
 {
-    internal partial class HtmlMessageWriter : MessageWriter
+    internal class HtmlMessageWriter : MessageWriter
    {
        private readonly TextWriter _writer;
        private readonly string _themeName;

-        private readonly List<Message> _messageGroupBuffer = new List<Message>();
-
-        private readonly Template _preambleTemplate;
-        private readonly Template _messageGroupTemplate;
-        private readonly Template _postambleTemplate;
+        private readonly List<Message> _messageGroupBuffer = new();

        private long _messageCount;

@@ -33,89 +21,24 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
        {
            _writer = new StreamWriter(stream);
            _themeName = themeName;
-
-            _preambleTemplate = Template.Parse(GetPreambleTemplateCode());
-            _messageGroupTemplate = Template.Parse(GetMessageGroupTemplateCode());
-            _postambleTemplate = Template.Parse(GetPostambleTemplateCode());
-        }
-
-        private TemplateContext CreateTemplateContext(IReadOnlyDictionary<string, object>? constants = null)
-        {
-            // Template context
-            var templateContext = new TemplateContext
-            {
-                MemberRenamer = m => m.Name,
-                MemberFilter = m => true,
-                LoopLimit = int.MaxValue,
-                StrictVariables = true
-            };
-
-            // Model
-            var scriptObject = new ScriptObject();
-
-            // Constants
-            scriptObject.SetValue("Context", Context, true);
-            scriptObject.SetValue("CoreStyleSheet", GetCoreStyleSheetCode(), true);
-            scriptObject.SetValue("ThemeStyleSheet", GetThemeStyleSheetCode(_themeName), true);
-            scriptObject.SetValue("HighlightJsStyleName", $"solarized-{_themeName.ToLowerInvariant()}", true);
-
-            // Additional constants
-            if (constants != null)
-            {
-                foreach (var (member, value) in constants)
-                    scriptObject.SetValue(member, value, true);
-            }
-
-            // Functions
-            scriptObject.Import("FormatDate",
-                new Func<DateTimeOffset, string>(d => d.ToLocalString(Context.Request.DateFormat)));
-
-            scriptObject.Import("FormatColorRgb",
-                new Func<Color?, string?>(c => c != null ? $"rgb({c?.R}, {c?.G}, {c?.B})" : null));
-
-            scriptObject.Import("TryGetUserColor",
-                new Func<User, Color?>(Context.TryGetUserColor));
-
-            scriptObject.Import("TryGetUserNick",
-                new Func<User, string?>(u => Context.TryGetMember(u.Id)?.Nick));
-
-            scriptObject.Import("FormatMarkdown",
-                new Func<string?, string>(m => FormatMarkdown(m)));
-
-            scriptObject.Import("FormatEmbedMarkdown",
-                new Func<string?, string>(m => FormatMarkdown(m, false)));
-
-            // HACK: Scriban doesn't support async, so we have to resort to this and be careful about deadlocks.
-            // TODO: move to Razor.
-            scriptObject.Import("ResolveUrl",
-                new Func<string, string>(u => Context.ResolveMediaUrlAsync(u).GetAwaiter().GetResult()));
-
-            // Push model
-            templateContext.PushGlobal(scriptObject);
-
-            // Push output
-            templateContext.PushOutput(new TextWriterOutput(_writer));
-
-            return templateContext;
-        }
-
-        private string FormatMarkdown(string? markdown, bool isJumboAllowed = true) =>
-            HtmlMarkdownVisitor.Format(Context, markdown ?? "", isJumboAllowed);
-
-        private async ValueTask WriteCurrentMessageGroupAsync()
-        {
-            var templateContext = CreateTemplateContext(new Dictionary<string, object>
-            {
-                ["MessageGroup"] = MessageGroup.Join(_messageGroupBuffer)
-            });
-
-            await templateContext.EvaluateAsync(_messageGroupTemplate.Page);
        }

        public override async ValueTask WritePreambleAsync()
        {
-            var templateContext = CreateTemplateContext();
-            await templateContext.EvaluateAsync(_preambleTemplate.Page);
+            var templateContext = new LayoutTemplateContext(Context, _themeName, _messageCount);
+
+            await _writer.WriteLineAsync(
+                await PreambleTemplate.RenderAsync(templateContext)
+            );
+        }
+
+        private async ValueTask WriteMessageGroupAsync(MessageGroup messageGroup)
+        {
+            var templateContext = new MessageGroupTemplateContext(Context, messageGroup);
+
+            await _writer.WriteLineAsync(
+                await MessageGroupTemplate.RenderAsync(templateContext)
+            );
        }

        public override async ValueTask WriteMessageAsync(Message message)
@@ -128,7 +51,7 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
            // Otherwise, flush the group and render messages
            else
            {
-                await WriteCurrentMessageGroupAsync();
+                await WriteMessageGroupAsync(MessageGroup.Join(_messageGroupBuffer));

                _messageGroupBuffer.Clear();
                _messageGroupBuffer.Add(message);
@@ -142,14 +65,13 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
        {
            // Flush current message group
            if (_messageGroupBuffer.Any())
-                await WriteCurrentMessageGroupAsync();
+                await WriteMessageGroupAsync(MessageGroup.Join(_messageGroupBuffer));

-            var templateContext = CreateTemplateContext(new Dictionary<string, object>
-            {
-                ["MessageCount"] = _messageCount
-            });
+            var templateContext = new LayoutTemplateContext(Context, _themeName, _messageCount);

-            await templateContext.EvaluateAsync(_postambleTemplate.Page);
+            await _writer.WriteLineAsync(
+                await PostambleTemplate.RenderAsync(templateContext)
+            );
        }

        public override async ValueTask DisposeAsync()
@@ -158,32 +80,4 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
            await base.DisposeAsync();
        }
    }
-
-    internal partial class HtmlMessageWriter
-    {
-        private static readonly Assembly ResourcesAssembly = typeof(HtmlMessageWriter).Assembly;
-        private static readonly string ResourcesNamespace = $"{ResourcesAssembly.GetName().Name}.Exporting.Writers.Html";
-
-        private static string GetCoreStyleSheetCode() =>
-            ResourcesAssembly
-                .GetManifestResourceString($"{ResourcesNamespace}.Core.css");
-
-        private static string GetThemeStyleSheetCode(string themeName) =>
-            ResourcesAssembly
-                .GetManifestResourceString($"{ResourcesNamespace}.{themeName}.css");
-
-        private static string GetPreambleTemplateCode() =>
-            ResourcesAssembly
-                .GetManifestResourceString($"{ResourcesNamespace}.LayoutTemplate.html")
-                .SubstringUntil("{{~ %SPLIT% ~}}");
-
-        private static string GetMessageGroupTemplateCode() =>
-            ResourcesAssembly
-                .GetManifestResourceString($"{ResourcesNamespace}.MessageGroupTemplate.html");
-
-        private static string GetPostambleTemplateCode() =>
-            ResourcesAssembly
-                .GetManifestResourceString($"{ResourcesNamespace}.LayoutTemplate.html")
-                .SubstringAfter("{{~ %SPLIT% ~}}");
-    }
 }
@@ -1,9 +1,11 @@
 using System.IO;
 using System.Text.Json;
 using System.Threading.Tasks;
+using System.Text.Encodings.Web;
 using DiscordChatExporter.Domain.Discord.Models;
 using DiscordChatExporter.Domain.Exporting.Writers.MarkdownVisitors;
 using DiscordChatExporter.Domain.Internal.Extensions;
+using JsonExtensions.Writing;

 namespace DiscordChatExporter.Domain.Exporting.Writers
 {
@@ -18,6 +20,7 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
        {
            _writer = new Utf8JsonWriter(stream, new JsonWriterOptions
            {
+                Encoder = JavaScriptEncoder.UnsafeRelaxedJsonEscaping,
                Indented = true
            });
        }
@@ -29,7 +32,7 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
        {
            _writer.WriteStartObject();

-            _writer.WriteString("id", attachment.Id);
+            _writer.WriteString("id", attachment.Id.ToString());
            _writer.WriteString("url", await Context.ResolveMediaUrlAsync(attachment.Url));
            _writer.WriteString("fileName", attachment.FileName);
            _writer.WriteNumber("fileSizeBytes", attachment.FileSize.TotalBytes);
@@ -114,6 +117,9 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
            _writer.WriteString("timestamp", embed.Timestamp);
            _writer.WriteString("description", FormatMarkdown(embed.Description));

+            if (embed.Color != null)
+                _writer.WriteString("color", embed.Color.Value.ToHex());
+
            if (embed.Author != null)
                await WriteEmbedAuthorAsync(embed.Author);

@@ -156,6 +162,20 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
            await _writer.FlushAsync();
        }

+        private async ValueTask WriteMentionAsync(User mentionedUser)
+        {
+            _writer.WriteStartObject();
+
+            _writer.WriteString("id", mentionedUser.Id.ToString());
+            _writer.WriteString("name", mentionedUser.Name);
+            _writer.WriteNumber("discriminator", mentionedUser.Discriminator);
+            _writer.WriteString("nickname", Context.TryGetMember(mentionedUser.Id)?.Nick ?? mentionedUser.Name);
+            _writer.WriteBoolean("isBot", mentionedUser.IsBot);
+
+            _writer.WriteEndObject();
+            await _writer.FlushAsync();
+        }
+
        public override async ValueTask WritePreambleAsync()
        {
            // Root object (start)
@@ -163,24 +183,24 @@ namespace DiscordChatExporter.Domain.Exporting.Writers

            // Guild
            _writer.WriteStartObject("guild");
-            _writer.WriteString("id", Context.Request.Guild.Id);
+            _writer.WriteString("id", Context.Request.Guild.Id.ToString());
            _writer.WriteString("name", Context.Request.Guild.Name);
            _writer.WriteString("iconUrl", await Context.ResolveMediaUrlAsync(Context.Request.Guild.IconUrl));
            _writer.WriteEndObject();

            // Channel
            _writer.WriteStartObject("channel");
-            _writer.WriteString("id", Context.Request.Channel.Id);
+            _writer.WriteString("id", Context.Request.Channel.Id.ToString());
            _writer.WriteString("type", Context.Request.Channel.Type.ToString());
-            _writer.WriteString("category", Context.Request.Channel.Category);
+            _writer.WriteString("category", Context.Request.Channel.Category.Name);
            _writer.WriteString("name", Context.Request.Channel.Name);
            _writer.WriteString("topic", Context.Request.Channel.Topic);
            _writer.WriteEndObject();

            // Date range
            _writer.WriteStartObject("dateRange");
-            _writer.WriteString("after", Context.Request.After);
-            _writer.WriteString("before", Context.Request.Before);
+            _writer.WriteString("after", Context.Request.After?.ToDate());
+            _writer.WriteString("before", Context.Request.Before?.ToDate());
            _writer.WriteEndObject();

            // Message array (start)
@@ -193,10 +213,11 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
            _writer.WriteStartObject();

            // Metadata
-            _writer.WriteString("id", message.Id);
+            _writer.WriteString("id", message.Id.ToString());
            _writer.WriteString("type", message.Type.ToString());
            _writer.WriteString("timestamp", message.Timestamp);
            _writer.WriteString("timestampEdited", message.EditedTimestamp);
+            _writer.WriteString("callEndedTimestamp", message.CallEndedTimestamp);
            _writer.WriteBoolean("isPinned", message.IsPinned);

            // Content
@@ -204,7 +225,7 @@ namespace DiscordChatExporter.Domain.Exporting.Writers

            // Author
            _writer.WriteStartObject("author");
-            _writer.WriteString("id", message.Author.Id);
+            _writer.WriteString("id", message.Author.Id.ToString());
            _writer.WriteString("name", message.Author.Name);
            _writer.WriteString("discriminator", $"{message.Author.Discriminator:0000}");
            _writer.WriteBoolean("isBot", message.Author.IsBot);
@@ -235,6 +256,24 @@ namespace DiscordChatExporter.Domain.Exporting.Writers

            _writer.WriteEndArray();

+            // Mentions
+            _writer.WriteStartArray("mentions");
+
+            foreach (var mention in message.MentionedUsers)
+                await WriteMentionAsync(mention);
+
+            _writer.WriteEndArray();
+
+            // Message reference
+            if (message.Reference != null)
+            {
+                _writer.WriteStartObject("reference");
+                _writer.WriteString("messageId", message.Reference.MessageId?.ToString());
+                _writer.WriteString("channelId", message.Reference.ChannelId?.ToString());
+                _writer.WriteString("guildId", message.Reference.GuildId?.ToString());
+                _writer.WriteEndObject();
+            }
+
            _writer.WriteEndObject();
            await _writer.FlushAsync();

@@ -3,9 +3,11 @@ using System.Linq;
 using System.Net;
 using System.Text;
 using System.Text.RegularExpressions;
+using DiscordChatExporter.Domain.Discord;
 using DiscordChatExporter.Domain.Discord.Models;
 using DiscordChatExporter.Domain.Markdown;
 using DiscordChatExporter.Domain.Markdown.Ast;
+using DiscordChatExporter.Domain.Utilities;

 namespace DiscordChatExporter.Domain.Exporting.Writers.MarkdownVisitors
 {
@@ -75,6 +77,7 @@ namespace DiscordChatExporter.Domain.Exporting.Writers.MarkdownVisitors

        protected override MarkdownNode VisitMention(MentionNode mention)
        {
+            var mentionId = Snowflake.TryParse(mention.Id);
            if (mention.Type == MentionType.Meta)
            {
                _buffer
@@ -84,7 +87,7 @@ namespace DiscordChatExporter.Domain.Exporting.Writers.MarkdownVisitors
            }
            else if (mention.Type == MentionType.User)
            {
-                var member = _context.TryGetMember(mention.Id);
+                var member = mentionId?.Pipe(_context.TryGetMember);
                var fullName = member?.User.FullName ?? "Unknown";
                var nick = member?.Nick ?? "Unknown";

@@ -95,7 +98,7 @@ namespace DiscordChatExporter.Domain.Exporting.Writers.MarkdownVisitors
            }
            else if (mention.Type == MentionType.Channel)
            {
-                var channel = _context.TryGetChannel(mention.Id);
+                var channel = mentionId?.Pipe(_context.TryGetChannel);
                var name = channel?.Name ?? "deleted-channel";

                _buffer
@@ -105,7 +108,7 @@ namespace DiscordChatExporter.Domain.Exporting.Writers.MarkdownVisitors
            }
            else if (mention.Type == MentionType.Role)
            {
-                var role = _context.TryGetRole(mention.Id);
+                var role = mentionId?.Pipe(_context.TryGetRole);
                var name = role?.Name ?? "deleted-role";
                var color = role?.Color;

@@ -1,6 +1,8 @@
 using System.Text;
+using DiscordChatExporter.Domain.Discord;
 using DiscordChatExporter.Domain.Markdown;
 using DiscordChatExporter.Domain.Markdown.Ast;
+using DiscordChatExporter.Domain.Utilities;

 namespace DiscordChatExporter.Domain.Exporting.Writers.MarkdownVisitors
 {
@@ -23,27 +25,28 @@ namespace DiscordChatExporter.Domain.Exporting.Writers.MarkdownVisitors

        protected override MarkdownNode VisitMention(MentionNode mention)
        {
+            var mentionId = Snowflake.TryParse(mention.Id);
            if (mention.Type == MentionType.Meta)
            {
                _buffer.Append($"@{mention.Id}");
            }
            else if (mention.Type == MentionType.User)
            {
-                var member = _context.TryGetMember(mention.Id);
+                var member = mentionId?.Pipe(_context.TryGetMember);
                var name = member?.User.Name ?? "Unknown";

                _buffer.Append($"@{name}");
            }
            else if (mention.Type == MentionType.Channel)
            {
-                var channel = _context.TryGetChannel(mention.Id);
+                var channel = mentionId?.Pipe(_context.TryGetChannel);
                var name = channel?.Name ?? "deleted-channel";

                _buffer.Append($"#{name}");
            }
            else if (mention.Type == MentionType.Role)
            {
-                var role = _context.TryGetRole(mention.Id);
+                var role = mentionId?.Pipe(_context.TryGetRole);
                var name = role?.Name ?? "deleted-role";

                _buffer.Append($"@{name}");
@@ -4,7 +4,6 @@ using System.Linq;
 using System.Threading.Tasks;
 using DiscordChatExporter.Domain.Discord.Models;
 using DiscordChatExporter.Domain.Exporting.Writers.MarkdownVisitors;
-using DiscordChatExporter.Domain.Internal.Extensions;
 using Tyrrrz.Extensions;

 namespace DiscordChatExporter.Domain.Exporting.Writers
@@ -27,7 +26,7 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
        private async ValueTask WriteMessageHeaderAsync(Message message)
        {
            // Timestamp & author
-            await _writer.WriteAsync($"[{message.Timestamp.ToLocalString(Context.Request.DateFormat)}]");
+            await _writer.WriteAsync($"[{Context.FormatDate(message.Timestamp)}]");
            await _writer.WriteAsync($" {message.Author.FullName}");

            // Whether the message is pinned
@@ -114,16 +113,16 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
        {
            await _writer.WriteLineAsync('='.Repeat(62));
            await _writer.WriteLineAsync($"Guild: {Context.Request.Guild.Name}");
-            await _writer.WriteLineAsync($"Channel: {Context.Request.Channel.Category} / {Context.Request.Channel.Name}");
+            await _writer.WriteLineAsync($"Channel: {Context.Request.Channel.Category.Name} / {Context.Request.Channel.Name}");

            if (!string.IsNullOrWhiteSpace(Context.Request.Channel.Topic))
                await _writer.WriteLineAsync($"Topic: {Context.Request.Channel.Topic}");

            if (Context.Request.After != null)
-                await _writer.WriteLineAsync($"After: {Context.Request.After.Value.ToLocalString(Context.Request.DateFormat)}");
+                await _writer.WriteLineAsync($"After: {Context.FormatDate(Context.Request.After.Value.ToDate())}");

            if (Context.Request.Before != null)
-                await _writer.WriteLineAsync($"Before: {Context.Request.Before.Value.ToLocalString(Context.Request.DateFormat)}");
+                await _writer.WriteLineAsync($"Before: {Context.FormatDate(Context.Request.Before.Value.ToDate())}");

            await _writer.WriteLineAsync('='.Repeat(62));
            await _writer.WriteLineAsync();
@@ -0,0 +1,19 @@
+using System.Text;
+
+namespace DiscordChatExporter.Domain.Internal.Extensions
+{
+    internal static class BinaryExtensions
+    {
+        public static string ToHex(this byte[] data)
+        {
+            var buffer = new StringBuilder();
+
+            foreach (var t in data)
+            {
+                buffer.Append(t.ToString("X2"));
+            }
+
+            return buffer.ToString();
+        }
+    }
+}
@@ -9,5 +9,7 @@ namespace DiscordChatExporter.Domain.Internal.Extensions
        public static Color ResetAlpha(this Color color) => color.WithAlpha(255);

        public static int ToRgb(this Color color) => color.ToArgb() & 0xffffff;
+
+        public static string ToHex(this Color color) => $"#{color.R:X2}{color.G:X2}{color.B:X2}";
    }
 }
@@ -5,12 +5,6 @@ namespace DiscordChatExporter.Domain.Internal.Extensions
 {
    internal static class DateExtensions
    {
-        public static string ToSnowflake(this DateTimeOffset dateTime)
-        {
-            var value = ((ulong) dateTime.ToUnixTimeMilliseconds() - 1420070400000UL) << 22;
-            return value.ToString();
-        }
-
        public static string ToLocalString(this DateTimeOffset dateTime, string format) =>
            dateTime.ToLocalTime().ToString(format, CultureInfo.InvariantCulture);
    }
@@ -4,8 +4,6 @@ namespace DiscordChatExporter.Domain.Internal.Extensions
 {
    internal static class GenericExtensions
    {
-        public static TOut Pipe<TIn, TOut>(this TIn input, Func<TIn, TOut> transform) => transform(input);
-
        public static T? NullIf<T>(this T value, Func<T, bool> predicate) where T : struct =>
            !predicate(value)
                ? value
@@ -1,28 +0,0 @@
-using System.IO;
-using System.Net.Http;
-using System.Text.Json;
-using System.Threading.Tasks;
-
-namespace DiscordChatExporter.Domain.Internal.Extensions
-{
-    internal static class HttpClientExtensions
-    {
-        // HACK: ConfigureAwait() is crucial here to enable sync-over-async in HtmlMessageWriter
-        public static async ValueTask DownloadAsync(this HttpClient httpClient, string uri, string outputFilePath)
-        {
-            await using var input = await httpClient.GetStreamAsync(uri).ConfigureAwait(false);
-            var output = File.Create(outputFilePath);
-
-            await input.CopyToAsync(output).ConfigureAwait(false);
-            await output.DisposeAsync().ConfigureAwait(false);
-        }
-
-        public static async ValueTask<JsonElement> ReadAsJsonAsync(this HttpContent content)
-        {
-            await using var stream = await content.ReadAsStreamAsync();
-            using var doc = await JsonDocument.ParseAsync(stream);
-
-            return doc.RootElement.Clone();
-        }
-    }
-}
@@ -0,0 +1,12 @@
+using System.Net.Http.Headers;
+
+namespace DiscordChatExporter.Domain.Internal.Extensions
+{
+    internal static class HttpExtensions
+    {
+        public static string? TryGetValue(this HttpContentHeaders headers, string name) =>
+            headers.TryGetValues(name, out var values)
+                ? string.Concat(values)
+                : null;
+    }
+}
@@ -1,12 +0,0 @@
-using System.Text.Json;
-
-namespace DiscordChatExporter.Domain.Internal.Extensions
-{
-    internal static class JsonElementExtensions
-    {
-        public static JsonElement? GetPropertyOrNull(this JsonElement element, string propertyName) =>
-            element.TryGetProperty(propertyName, out var result) && result.ValueKind != JsonValueKind.Null
-                ? result
-                : (JsonElement?) null;
-    }
-}
@@ -4,6 +4,11 @@ namespace DiscordChatExporter.Domain.Internal.Extensions
 {
    internal static class StringExtensions
    {
+        public static string Truncate(this string str, int charCount) =>
+            str.Length > charCount
+                ? str.Substring(0, charCount)
+                : str;
+
        public static StringBuilder AppendIfNotEmpty(this StringBuilder builder, char value) =>
            builder.Length > 0
                ? builder.Append(value)
@@ -1,28 +0,0 @@
-using System;
-using System.Text.Json;
-
-namespace DiscordChatExporter.Domain.Internal.Extensions
-{
-    internal static class Utf8JsonWriterExtensions
-    {
-        public static void WriteString(this Utf8JsonWriter writer, string propertyName, DateTimeOffset? value)
-        {
-            writer.WritePropertyName(propertyName);
-
-            if (value != null)
-                writer.WriteStringValue(value.Value);
-            else
-                writer.WriteNullValue();
-        }
-
-        public static void WriteNumber(this Utf8JsonWriter writer, string propertyName, int? value)
-        {
-            writer.WritePropertyName(propertyName);
-
-            if (value != null)
-                writer.WriteNumberValue(value.Value);
-            else
-                writer.WriteNullValue();
-        }
-    }
-}
@@ -0,0 +1,61 @@
+using System;
+using System.Globalization;
+using System.IO;
+using System.Net;
+using System.Net.Http;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using Polly;
+
+namespace DiscordChatExporter.Domain.Internal
+{
+    internal static class Http
+    {
+        public static HttpClient Client { get; } = new();
+
+        public static IAsyncPolicy<HttpResponseMessage> ResponsePolicy { get; } =
+            Policy
+                .Handle<IOException>()
+                .Or<HttpRequestException>()
+                .OrResult<HttpResponseMessage>(m => m.StatusCode == HttpStatusCode.TooManyRequests)
+                .OrResult(m => m.StatusCode == HttpStatusCode.RequestTimeout)
+                .OrResult(m => m.StatusCode >= HttpStatusCode.InternalServerError)
+                .WaitAndRetryAsync(8,
+                    (i, result, _) =>
+                    {
+                        // If rate-limited, use retry-after as a guide
+                        if (result.Result?.StatusCode == HttpStatusCode.TooManyRequests)
+                        {
+                            // Only start respecting retry-after after a few attempts.
+                            // The reason is that Discord often sends unreasonable (20+ minutes) retry-after
+                            // on the very first request.
+                            if (i > 3)
+                            {
+                                var retryAfterDelay = result.Result.Headers.RetryAfter.Delta;
+                                if (retryAfterDelay != null)
+                                    return retryAfterDelay.Value + TimeSpan.FromSeconds(1); // margin just in case
+                            }
+                        }
+
+                        return TimeSpan.FromSeconds(Math.Pow(2, i) + 1);
+                    },
+                    (_, _, _, _) => Task.CompletedTask);
+
+        private static HttpStatusCode? TryGetStatusCodeFromException(HttpRequestException ex)
+        {
+            // This is extremely frail, but there's no other way
+            var statusCodeRaw = Regex.Match(ex.Message, @": (\d+) \(").Groups[1].Value;
+            return !string.IsNullOrWhiteSpace(statusCodeRaw)
+                ? (HttpStatusCode) int.Parse(statusCodeRaw, CultureInfo.InvariantCulture)
+                : (HttpStatusCode?) null;
+        }
+
+        public static IAsyncPolicy ExceptionPolicy { get; } =
+            Policy
+                .Handle<IOException>() // dangerous
+                .Or<HttpRequestException>(ex => TryGetStatusCodeFromException(ex) == HttpStatusCode.TooManyRequests)
+                .Or<HttpRequestException>(ex => TryGetStatusCodeFromException(ex) == HttpStatusCode.RequestTimeout)
+                .Or<HttpRequestException>(ex => TryGetStatusCodeFromException(ex) >= HttpStatusCode.InternalServerError)
+                .WaitAndRetryAsync(4, i => TimeSpan.FromSeconds(Math.Pow(2, i) + 1));
+    }
+}
@@ -0,0 +1,18 @@
+using System.IO;
+using System.Text;
+
+namespace DiscordChatExporter.Domain.Internal
+{
+    internal static class PathEx
+    {
+        public static StringBuilder EscapePath(StringBuilder pathBuffer)
+        {
+            foreach (var invalidChar in Path.GetInvalidFileNameChars())
+                pathBuffer.Replace(invalidChar, '_');
+
+            return pathBuffer;
+        }
+
+        public static string EscapePath(string path) => EscapePath(new StringBuilder(path)).ToString();
+    }
+}
@@ -1,23 +0,0 @@
-using System;
-using System.Net;
-using System.Net.Http;
-
-namespace DiscordChatExporter.Domain.Internal
-{
-    internal static class Singleton
-    {
-        private static readonly Lazy<HttpClient> LazyHttpClient = new Lazy<HttpClient>(() =>
-        {
-            var handler = new HttpClientHandler();
-
-            if (handler.SupportsAutomaticDecompression)
-                handler.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
-
-            handler.UseCookies = false;
-
-            return new HttpClient(handler, true);
-        });
-
-        public static HttpClient HttpClient { get; } = LazyHttpClient.Value;
-    }
-}
@@ -10,8 +10,7 @@ namespace DiscordChatExporter.Domain.Internal
    {
        private string _path = "";

-        private readonly Dictionary<string, string?> _queryParameters =
-            new Dictionary<string, string?>(StringComparer.OrdinalIgnoreCase);
+        private readonly Dictionary<string, string?> _queryParameters = new(StringComparer.OrdinalIgnoreCase);

        public UrlBuilder SetPath(string path)
        {
@@ -9,74 +9,92 @@ namespace DiscordChatExporter.Domain.Markdown
    // The following parsing logic is meant to replicate Discord's markdown grammar as close as possible
    internal static partial class MarkdownParser
    {
-        private const RegexOptions DefaultRegexOptions = RegexOptions.Compiled | RegexOptions.CultureInvariant | RegexOptions.Multiline;
+        private const RegexOptions DefaultRegexOptions =
+            RegexOptions.Compiled |
+            RegexOptions.CultureInvariant |
+            RegexOptions.Multiline;

        /* Formatting */

        // Capture any character until the earliest double asterisk not followed by an asterisk
        private static readonly IMatcher<MarkdownNode> BoldFormattedNodeMatcher = new RegexMatcher<MarkdownNode>(
            new Regex("\\*\\*(.+?)\\*\\*(?!\\*)", DefaultRegexOptions | RegexOptions.Singleline),
-            (p, m) => new FormattedNode(TextFormatting.Bold, Parse(p.Slice(m.Groups[1]))));
+            (p, m) => new FormattedNode(TextFormatting.Bold, Parse(p.Slice(m.Groups[1])))
+        );

        // Capture any character until the earliest single asterisk not preceded or followed by an asterisk
        // Opening asterisk must not be followed by whitespace
        // Closing asterisk must not be preceded by whitespace
        private static readonly IMatcher<MarkdownNode> ItalicFormattedNodeMatcher = new RegexMatcher<MarkdownNode>(
            new Regex("\\*(?!\\s)(.+?)(?<!\\s|\\*)\\*(?!\\*)", DefaultRegexOptions | RegexOptions.Singleline),
-            (p, m) => new FormattedNode(TextFormatting.Italic, Parse(p.Slice(m.Groups[1]))));
+            (p, m) => new FormattedNode(TextFormatting.Italic, Parse(p.Slice(m.Groups[1])))
+        );

        // Capture any character until the earliest triple asterisk not followed by an asterisk
        private static readonly IMatcher<MarkdownNode> ItalicBoldFormattedNodeMatcher = new RegexMatcher<MarkdownNode>(
            new Regex("\\*(\\*\\*.+?\\*\\*)\\*(?!\\*)", DefaultRegexOptions | RegexOptions.Singleline),
-            (p, m) => new FormattedNode(TextFormatting.Italic, Parse(p.Slice(m.Groups[1]), BoldFormattedNodeMatcher)));
+            (p, m) => new FormattedNode(TextFormatting.Italic, Parse(p.Slice(m.Groups[1]), BoldFormattedNodeMatcher))
+        );

        // Capture any character except underscore until an underscore
        // Closing underscore must not be followed by a word character
        private static readonly IMatcher<MarkdownNode> ItalicAltFormattedNodeMatcher = new RegexMatcher<MarkdownNode>(
            new Regex("_([^_]+)_(?!\\w)", DefaultRegexOptions | RegexOptions.Singleline),
-            (p, m) => new FormattedNode(TextFormatting.Italic, Parse(p.Slice(m.Groups[1]))));
+            (p, m) => new FormattedNode(TextFormatting.Italic, Parse(p.Slice(m.Groups[1])))
+        );

        // Capture any character until the earliest double underscore not followed by an underscore
        private static readonly IMatcher<MarkdownNode> UnderlineFormattedNodeMatcher = new RegexMatcher<MarkdownNode>(
            new Regex("__(.+?)__(?!_)", DefaultRegexOptions | RegexOptions.Singleline),
-            (p, m) => new FormattedNode(TextFormatting.Underline, Parse(p.Slice(m.Groups[1]))));
+            (p, m) => new FormattedNode(TextFormatting.Underline, Parse(p.Slice(m.Groups[1])))
+        );

        // Capture any character until the earliest triple underscore not followed by an underscore
-        private static readonly IMatcher<MarkdownNode> ItalicUnderlineFormattedNodeMatcher = new RegexMatcher<MarkdownNode>(
-            new Regex("_(__.+?__)_(?!_)", DefaultRegexOptions | RegexOptions.Singleline),
-            (p, m) => new FormattedNode(TextFormatting.Italic, Parse(p.Slice(m.Groups[1]), UnderlineFormattedNodeMatcher)));
+        private static readonly IMatcher<MarkdownNode> ItalicUnderlineFormattedNodeMatcher =
+            new RegexMatcher<MarkdownNode>(
+                new Regex("_(__.+?__)_(?!_)", DefaultRegexOptions | RegexOptions.Singleline),
+                (p, m) => new FormattedNode(TextFormatting.Italic,
+                    Parse(p.Slice(m.Groups[1]), UnderlineFormattedNodeMatcher))
+            );

        // Capture any character until the earliest double tilde
-        private static readonly IMatcher<MarkdownNode> StrikethroughFormattedNodeMatcher = new RegexMatcher<MarkdownNode>(
-            new Regex("~~(.+?)~~", DefaultRegexOptions | RegexOptions.Singleline),
-            (p, m) => new FormattedNode(TextFormatting.Strikethrough, Parse(p.Slice(m.Groups[1]))));
+        private static readonly IMatcher<MarkdownNode> StrikethroughFormattedNodeMatcher =
+            new RegexMatcher<MarkdownNode>(
+                new Regex("~~(.+?)~~", DefaultRegexOptions | RegexOptions.Singleline),
+                (p, m) => new FormattedNode(TextFormatting.Strikethrough, Parse(p.Slice(m.Groups[1])))
+            );

        // Capture any character until the earliest double pipe
        private static readonly IMatcher<MarkdownNode> SpoilerFormattedNodeMatcher = new RegexMatcher<MarkdownNode>(
            new Regex("\\|\\|(.+?)\\|\\|", DefaultRegexOptions | RegexOptions.Singleline),
-            (p, m) => new FormattedNode(TextFormatting.Spoiler, Parse(p.Slice(m.Groups[1]))));
+            (p, m) => new FormattedNode(TextFormatting.Spoiler, Parse(p.Slice(m.Groups[1])))
+        );

        // Capture any character until the end of the line
        // Opening 'greater than' character must be followed by whitespace
        private static readonly IMatcher<MarkdownNode> SingleLineQuoteNodeMatcher = new RegexMatcher<MarkdownNode>(
            new Regex("^>\\s(.+\n?)", DefaultRegexOptions),
-            (p, m) => new FormattedNode(TextFormatting.Quote, Parse(p.Slice(m.Groups[1]))));
+            (p, m) => new FormattedNode(TextFormatting.Quote, Parse(p.Slice(m.Groups[1])))
+        );

        // Repeatedly capture any character until the end of the line
        // This one is tricky as it ends up producing multiple separate captures which need to be joined
-        private static readonly IMatcher<MarkdownNode> RepeatedSingleLineQuoteNodeMatcher = new RegexMatcher<MarkdownNode>(
-            new Regex("(?:^>\\s(.+\n?)){2,}", DefaultRegexOptions),
-            (p, m) =>
-            {
-                var content = string.Concat(m.Groups[1].Captures.Select(c => c.Value));
-                return new FormattedNode(TextFormatting.Quote, Parse(content));
-            });
+        private static readonly IMatcher<MarkdownNode> RepeatedSingleLineQuoteNodeMatcher =
+            new RegexMatcher<MarkdownNode>(
+                new Regex("(?:^>\\s(.+\n?)){2,}", DefaultRegexOptions),
+                (_, m) =>
+                {
+                    var content = string.Concat(m.Groups[1].Captures.Select(c => c.Value));
+                    return new FormattedNode(TextFormatting.Quote, Parse(content));
+                }
+            );

        // Capture any character until the end of the input
        // Opening 'greater than' characters must be followed by whitespace
        private static readonly IMatcher<MarkdownNode> MultiLineQuoteNodeMatcher = new RegexMatcher<MarkdownNode>(
            new Regex("^>>>\\s(.+)", DefaultRegexOptions | RegexOptions.Singleline),
-            (p, m) => new FormattedNode(TextFormatting.Quote, Parse(p.Slice(m.Groups[1]))));
+            (p, m) => new FormattedNode(TextFormatting.Quote, Parse(p.Slice(m.Groups[1])))
+        );

        /* Code blocks */

@@ -85,41 +103,48 @@ namespace DiscordChatExporter.Domain.Markdown
        // There can be either one or two backticks, but equal number on both sides
        private static readonly IMatcher<MarkdownNode> InlineCodeBlockNodeMatcher = new RegexMatcher<MarkdownNode>(
            new Regex("(`{1,2})([^`]+)\\1", DefaultRegexOptions | RegexOptions.Singleline),
-            m => new InlineCodeBlockNode(m.Groups[2].Value.Trim('\r', '\n')));
+            m => new InlineCodeBlockNode(m.Groups[2].Value.Trim('\r', '\n'))
+        );

        // Capture language identifier and then any character until the earliest triple backtick
        // Language identifier is one word immediately after opening backticks, followed immediately by newline
        // Blank lines at the beginning and end of content are trimmed
        private static readonly IMatcher<MarkdownNode> MultiLineCodeBlockNodeMatcher = new RegexMatcher<MarkdownNode>(
            new Regex("```(?:(\\w*)\\n)?(.+?)```", DefaultRegexOptions | RegexOptions.Singleline),
-            m => new MultiLineCodeBlockNode(m.Groups[1].Value, m.Groups[2].Value.Trim('\r', '\n')));
+            m => new MultiLineCodeBlockNode(m.Groups[1].Value, m.Groups[2].Value.Trim('\r', '\n'))
+        );

        /* Mentions */

        // Capture @everyone
        private static readonly IMatcher<MarkdownNode> EveryoneMentionNodeMatcher = new StringMatcher<MarkdownNode>(
            "@everyone",
-            p => new MentionNode("everyone", MentionType.Meta));
+            _ => new MentionNode("everyone", MentionType.Meta)
+        );

        // Capture @here
        private static readonly IMatcher<MarkdownNode> HereMentionNodeMatcher = new StringMatcher<MarkdownNode>(
            "@here",
-            p => new MentionNode("here", MentionType.Meta));
+            _ => new MentionNode("here", MentionType.Meta)
+        );

        // Capture <@123456> or <@!123456>
        private static readonly IMatcher<MarkdownNode> UserMentionNodeMatcher = new RegexMatcher<MarkdownNode>(
            new Regex("<@!?(\\d+)>", DefaultRegexOptions),
-            m => new MentionNode(m.Groups[1].Value, MentionType.User));
+            m => new MentionNode(m.Groups[1].Value, MentionType.User)
+        );

        // Capture <#123456>
        private static readonly IMatcher<MarkdownNode> ChannelMentionNodeMatcher = new RegexMatcher<MarkdownNode>(
            new Regex("<#(\\d+)>", DefaultRegexOptions),
-            m => new MentionNode(m.Groups[1].Value, MentionType.Channel));
+            m => new MentionNode(m.Groups[1].Value, MentionType.Channel)
+        );

        // Capture <@&123456>
        private static readonly IMatcher<MarkdownNode> RoleMentionNodeMatcher = new RegexMatcher<MarkdownNode>(
            new Regex("<@&(\\d+)>", DefaultRegexOptions),
-            m => new MentionNode(m.Groups[1].Value, MentionType.Role));
+            m => new MentionNode(m.Groups[1].Value, MentionType.Role)
+        );

        /* Emojis */

@@ -129,30 +154,36 @@ namespace DiscordChatExporter.Domain.Markdown
        // ... or digit followed by enclosing mark
        // (this does not match all emojis in Discord but it's reasonably accurate enough)
        private static readonly IMatcher<MarkdownNode> StandardEmojiNodeMatcher = new RegexMatcher<MarkdownNode>(
-            new Regex("((?:[\\uD83C][\\uDDE6-\\uDDFF]){2}|[\\u2600-\\u26FF]|\\p{Cs}{2}|\\d\\p{Me})", DefaultRegexOptions),
-            m => new EmojiNode(m.Groups[1].Value));
+            new Regex("((?:[\\uD83C][\\uDDE6-\\uDDFF]){2}|[\\u2600-\\u26FF]|\\p{Cs}{2}|\\d\\p{Me})",
+                DefaultRegexOptions),
+            m => new EmojiNode(m.Groups[1].Value)
+        );

        // Capture <:lul:123456> or <a:lul:123456>
        private static readonly IMatcher<MarkdownNode> CustomEmojiNodeMatcher = new RegexMatcher<MarkdownNode>(
            new Regex("<(a)?:(.+?):(\\d+?)>", DefaultRegexOptions),
-            m => new EmojiNode(m.Groups[3].Value, m.Groups[2].Value, !string.IsNullOrWhiteSpace(m.Groups[1].Value)));
+            m => new EmojiNode(m.Groups[3].Value, m.Groups[2].Value, !string.IsNullOrWhiteSpace(m.Groups[1].Value))
+        );

        /* Links */

        // Capture [title](link)
        private static readonly IMatcher<MarkdownNode> TitledLinkNodeMatcher = new RegexMatcher<MarkdownNode>(
            new Regex("\\[(.+?)\\]\\((.+?)\\)", DefaultRegexOptions),
-            m => new LinkNode(m.Groups[2].Value, m.Groups[1].Value));
+            m => new LinkNode(m.Groups[2].Value, m.Groups[1].Value)
+        );

        // Capture any non-whitespace character after http:// or https:// until the last punctuation character or whitespace
        private static readonly IMatcher<MarkdownNode> AutoLinkNodeMatcher = new RegexMatcher<MarkdownNode>(
            new Regex("(https?://\\S*[^\\.,:;\"\'\\s])", DefaultRegexOptions),
-            m => new LinkNode(m.Groups[1].Value));
+            m => new LinkNode(m.Groups[1].Value)
+        );

        // Same as auto link but also surrounded by angular brackets
        private static readonly IMatcher<MarkdownNode> HiddenLinkNodeMatcher = new RegexMatcher<MarkdownNode>(
            new Regex("<(https?://\\S*[^\\.,:;\"\'\\s])>", DefaultRegexOptions),
-            m => new LinkNode(m.Groups[1].Value));
+            m => new LinkNode(m.Groups[1].Value)
+        );

        /* Text */

@@ -160,25 +191,29 @@ namespace DiscordChatExporter.Domain.Markdown
        // This escapes it from matching for formatting
        private static readonly IMatcher<MarkdownNode> ShrugTextNodeMatcher = new StringMatcher<MarkdownNode>(
            @"¯\_(ツ)_/¯",
-            p => new TextNode(p.ToString()));
+            p => new TextNode(p.ToString())
+        );

        // Capture some specific emojis that don't get rendered
        // This escapes it from matching for emoji
        private static readonly IMatcher<MarkdownNode> IgnoredEmojiTextNodeMatcher = new RegexMatcher<MarkdownNode>(
            new Regex("(\\u26A7|\\u2640|\\u2642|\\u2695|\\u267E|\\u00A9|\\u00AE|\\u2122)", DefaultRegexOptions),
-            m => new TextNode(m.Groups[1].Value));
+            m => new TextNode(m.Groups[1].Value)
+        );

        // Capture any "symbol/other" character or surrogate pair preceded by a backslash
        // This escapes it from matching for emoji
        private static readonly IMatcher<MarkdownNode> EscapedSymbolTextNodeMatcher = new RegexMatcher<MarkdownNode>(
            new Regex("\\\\(\\p{So}|\\p{Cs}{2})", DefaultRegexOptions),
-            m => new TextNode(m.Groups[1].Value));
+            m => new TextNode(m.Groups[1].Value)
+        );

        // Capture any non-whitespace, non latin alphanumeric character preceded by a backslash
        // This escapes it from matching for formatting or other tokens
        private static readonly IMatcher<MarkdownNode> EscapedCharacterTextNodeMatcher = new RegexMatcher<MarkdownNode>(
            new Regex("\\\\([^a-zA-Z0-9\\s])", DefaultRegexOptions),
-            m => new TextNode(m.Groups[1].Value));
+            m => new TextNode(m.Groups[1].Value)
+        );

        // Combine all matchers into one
        // Matchers that have similar patterns are ordered from most specific to least specific
@@ -25,7 +25,7 @@ namespace DiscordChatExporter.Domain.Markdown.Matching
        {
        }

-        public StringPart Slice(int newStartIndex, int newLength) => new StringPart(Target, newStartIndex, newLength);
+        public StringPart Slice(int newStartIndex, int newLength) => new(Target, newStartIndex, newLength);

        public StringPart Slice(int newStartIndex) => Slice(newStartIndex, EndIndex - newStartIndex);

@@ -9,7 +9,8 @@ namespace DiscordChatExporter.Domain.Utilities
 {
    public static class AsyncExtensions
    {
-        private static async ValueTask<IReadOnlyList<T>> AggregateAsync<T>(this IAsyncEnumerable<T> asyncEnumerable)
+        private static async ValueTask<IReadOnlyList<T>> AggregateAsync<T>(
+            this IAsyncEnumerable<T> asyncEnumerable)
        {
            var list = new List<T>();

@@ -19,10 +20,14 @@ namespace DiscordChatExporter.Domain.Utilities
            return list;
        }

-        public static ValueTaskAwaiter<IReadOnlyList<T>> GetAwaiter<T>(this IAsyncEnumerable<T> asyncEnumerable) =>
+        public static ValueTaskAwaiter<IReadOnlyList<T>> GetAwaiter<T>(
+            this IAsyncEnumerable<T> asyncEnumerable) =>
            asyncEnumerable.AggregateAsync().GetAwaiter();

-        public static async ValueTask ParallelForEachAsync<T>(this IEnumerable<T> source, Func<T, Task> handleAsync, int degreeOfParallelism)
+        public static async ValueTask ParallelForEachAsync<T>(
+            this IEnumerable<T> source,
+            Func<T, ValueTask> handleAsync,
+            int degreeOfParallelism)
        {
            using var semaphore = new SemaphoreSlim(degreeOfParallelism);

@@ -0,0 +1,9 @@
+using System;
+
+namespace DiscordChatExporter.Domain.Utilities
+{
+    public static class GeneralExtensions
+    {
+        public static TOut Pipe<TIn, TOut>(this TIn input, Func<TIn, TOut> transform) => transform(input);
+    }
+}
@@ -3,6 +3,7 @@
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:DiscordChatExporter.Gui"
+    xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
    xmlns:s="https://github.com/canton7/Stylet">
    <Application.Resources>
        <s:ApplicationLoader>
@@ -13,69 +14,15 @@

            <!--  Merged dictionaries  -->
            <ResourceDictionary.MergedDictionaries>
-                <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Light.xaml" />
+                <!--  Colors are irrelevant because they are overriden in runtime  -->
+                <materialDesign:BundledTheme
+                    BaseTheme="Light"
+                    PrimaryColor="Blue"
+                    SecondaryColor="Blue" />
+
                <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Defaults.xaml" />
            </ResourceDictionary.MergedDictionaries>

-            <!--  Colors  -->
-            <Color x:Key="PrimaryColor">#343838</Color>
-            <Color x:Key="PrimaryLightColor">#5E6262</Color>
-            <Color x:Key="PrimaryDarkColor">#0D1212</Color>
-            <Color x:Key="AccentColor">#F9A825</Color>
-            <Color x:Key="AccentDarkColor">#C17900</Color>
-            <Color x:Key="TextColor">#000000</Color>
-            <Color x:Key="InverseTextColor">#FFFFFF</Color>
-
-            <SolidColorBrush x:Key="PrimaryHueLightBrush" Color="{DynamicResource PrimaryLightColor}" />
-            <SolidColorBrush x:Key="PrimaryHueLightForegroundBrush" Color="{DynamicResource InverseTextColor}" />
-            <SolidColorBrush x:Key="PrimaryHueMidBrush" Color="{DynamicResource PrimaryColor}" />
-            <SolidColorBrush x:Key="PrimaryHueMidForegroundBrush" Color="{DynamicResource InverseTextColor}" />
-            <SolidColorBrush x:Key="PrimaryHueDarkBrush" Color="{DynamicResource PrimaryDarkColor}" />
-            <SolidColorBrush x:Key="PrimaryHueDarkForegroundBrush" Color="{DynamicResource InverseTextColor}" />
-            <SolidColorBrush x:Key="SecondaryAccentBrush" Color="{DynamicResource AccentColor}" />
-            <SolidColorBrush x:Key="SecondaryAccentForegroundBrush" Color="{DynamicResource TextColor}" />
-
-            <SolidColorBrush
-                x:Key="PrimaryTextBrush"
-                Opacity="0.87"
-                Color="{DynamicResource TextColor}" />
-            <SolidColorBrush
-                x:Key="SecondaryTextBrush"
-                Opacity="0.64"
-                Color="{DynamicResource TextColor}" />
-            <SolidColorBrush
-                x:Key="DimTextBrush"
-                Opacity="0.45"
-                Color="{DynamicResource TextColor}" />
-            <SolidColorBrush
-                x:Key="PrimaryInverseTextBrush"
-                Opacity="1"
-                Color="{DynamicResource InverseTextColor}" />
-            <SolidColorBrush
-                x:Key="SecondaryInverseTextBrush"
-                Opacity="0.7"
-                Color="{DynamicResource InverseTextColor}" />
-            <SolidColorBrush
-                x:Key="DimInverseTextBrush"
-                Opacity="0.52"
-                Color="{DynamicResource InverseTextColor}" />
-            <SolidColorBrush
-                x:Key="AccentTextBrush"
-                Opacity="1"
-                Color="{DynamicResource AccentColor}" />
-            <SolidColorBrush
-                x:Key="AccentDarkTextBrush"
-                Opacity="1"
-                Color="{DynamicResource AccentDarkColor}" />
-            <SolidColorBrush
-                x:Key="DividerBrush"
-                Opacity="0.12"
-                Color="{DynamicResource TextColor}" />
-            <SolidColorBrush
-                x:Key="InverseDividerBrush"
-                Opacity="0.12"
-                Color="{DynamicResource InverseTextColor}" />
-
            <!--  Styles  -->
            <Style x:Key="MaterialDesignRoot" TargetType="{x:Type Control}">
                <Setter Property="FontFamily" Value="{DynamicResource MaterialDesignFont}" />
@@ -83,7 +30,7 @@
                <Setter Property="SnapsToDevicePixels" Value="True" />
                <Setter Property="TextElement.FontSize" Value="13" />
                <Setter Property="TextElement.FontWeight" Value="Regular" />
-                <Setter Property="TextElement.Foreground" Value="{DynamicResource SecondaryTextBrush}" />
+                <Setter Property="TextElement.Foreground" Value="{DynamicResource MaterialDesignBody}" />
                <Setter Property="TextOptions.TextFormattingMode" Value="Ideal" />
                <Setter Property="TextOptions.TextRenderingMode" Value="Auto" />
                <Setter Property="UseLayoutRounding" Value="True" />
@@ -93,23 +40,20 @@

            <Style BasedOn="{StaticResource MaterialDesignLinearProgressBar}" TargetType="{x:Type ProgressBar}">
                <Setter Property="BorderThickness" Value="0" />
+                <Setter Property="Background" Value="Transparent" />
                <Setter Property="Foreground" Value="{DynamicResource SecondaryAccentBrush}" />
                <Setter Property="Height" Value="2" />
                <Setter Property="Maximum" Value="1" />
                <Setter Property="Minimum" Value="0" />
            </Style>

-            <Style BasedOn="{StaticResource MaterialDesignTextBox}" TargetType="{x:Type TextBox}">
-                <Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}" />
-            </Style>
+            <Style BasedOn="{StaticResource MaterialDesignTextBox}" TargetType="{x:Type TextBox}" />

-            <Style BasedOn="{StaticResource MaterialDesignComboBox}" TargetType="{x:Type ComboBox}">
-                <Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}" />
-            </Style>
+            <Style BasedOn="{StaticResource MaterialDesignComboBox}" TargetType="{x:Type ComboBox}" />

-            <Style BasedOn="{StaticResource MaterialDesignDatePicker}" TargetType="{x:Type DatePicker}">
-                <Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}" />
-            </Style>
+            <Style BasedOn="{StaticResource MaterialDesignDatePicker}" TargetType="{x:Type DatePicker}" />
+
+            <Style BasedOn="{StaticResource MaterialDesignTimePicker}" TargetType="{x:Type materialDesign:TimePicker}" />

            <Style
                x:Key="MaterialDesignFlatDarkButton"
@@ -136,6 +80,89 @@
                    </Trigger>
                </Style.Triggers>
            </Style>
+
+            <!--  Default MD Expander is incredibly slow (https://github.com/MaterialDesignInXAML/MaterialDesignInXamlToolkit/issues/1307)  -->
+            <Style BasedOn="{StaticResource MaterialDesignExpander}" TargetType="{x:Type Expander}">
+                <Setter Property="Template">
+                    <Setter.Value>
+                        <ControlTemplate TargetType="Expander">
+                            <Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}">
+                                <DockPanel Background="{TemplateBinding Background}">
+                                    <ToggleButton
+                                        Name="HeaderSite"
+                                        BorderThickness="0"
+                                        Content="{TemplateBinding Header}"
+                                        ContentStringFormat="{TemplateBinding HeaderStringFormat}"
+                                        ContentTemplate="{TemplateBinding HeaderTemplate}"
+                                        ContentTemplateSelector="{TemplateBinding HeaderTemplateSelector}"
+                                        Cursor="Hand"
+                                        DockPanel.Dock="Top"
+                                        Focusable="False"
+                                        Foreground="{TemplateBinding Foreground}"
+                                        IsChecked="{Binding Path=IsExpanded, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}"
+                                        IsTabStop="False"
+                                        Opacity=".87"
+                                        Style="{StaticResource MaterialDesignExpanderDownHeaderStyle}"
+                                        TextElement.FontSize="15" />
+                                    <Border
+                                        Name="ContentSite"
+                                        DockPanel.Dock="Bottom"
+                                        Visibility="Collapsed">
+                                        <StackPanel
+                                            Name="ContentPanel"
+                                            Margin="{TemplateBinding Padding}"
+                                            HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
+                                            VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
+                                            <ContentPresenter
+                                                Name="PART_Content"
+                                                ContentStringFormat="{TemplateBinding ContentStringFormat}"
+                                                ContentTemplate="{TemplateBinding ContentTemplate}"
+                                                ContentTemplateSelector="{TemplateBinding ContentTemplateSelector}"
+                                                Focusable="False" />
+                                        </StackPanel>
+                                    </Border>
+                                </DockPanel>
+                            </Border>
+                            <ControlTemplate.Triggers>
+                                <Trigger Property="IsExpanded" Value="true">
+                                    <Setter TargetName="ContentSite" Property="Visibility" Value="Visible" />
+                                </Trigger>
+                                <Trigger Property="ExpandDirection" Value="Right">
+                                    <Setter TargetName="HeaderSite" Property="DockPanel.Dock" Value="Left" />
+                                    <Setter TargetName="ContentSite" Property="DockPanel.Dock" Value="Right" />
+                                    <Setter TargetName="ContentPanel" Property="Orientation" Value="Horizontal" />
+                                    <Setter TargetName="ContentPanel" Property="Height" Value="Auto" />
+                                    <Setter TargetName="HeaderSite" Property="Style" Value="{StaticResource MaterialDesignExpanderRightHeaderStyle}" />
+                                </Trigger>
+
+                                <Trigger Property="ExpandDirection" Value="Left">
+                                    <Setter TargetName="HeaderSite" Property="DockPanel.Dock" Value="Right" />
+                                    <Setter TargetName="ContentSite" Property="DockPanel.Dock" Value="Left" />
+                                    <Setter TargetName="ContentPanel" Property="Orientation" Value="Horizontal" />
+                                    <Setter TargetName="ContentPanel" Property="Height" Value="Auto" />
+                                    <Setter TargetName="HeaderSite" Property="Style" Value="{StaticResource MaterialDesignExpanderLeftHeaderStyle}" />
+                                </Trigger>
+
+                                <Trigger Property="ExpandDirection" Value="Up">
+                                    <Setter TargetName="HeaderSite" Property="DockPanel.Dock" Value="Bottom" />
+                                    <Setter TargetName="ContentSite" Property="DockPanel.Dock" Value="Top" />
+                                    <Setter TargetName="ContentPanel" Property="Orientation" Value="Vertical" />
+                                    <Setter TargetName="ContentPanel" Property="Width" Value="Auto" />
+                                    <Setter TargetName="HeaderSite" Property="Style" Value="{StaticResource MaterialDesignExpanderUpHeaderStyle}" />
+                                </Trigger>
+
+                                <Trigger Property="ExpandDirection" Value="Down">
+                                    <Setter TargetName="HeaderSite" Property="DockPanel.Dock" Value="Top" />
+                                    <Setter TargetName="ContentSite" Property="DockPanel.Dock" Value="Bottom" />
+                                    <Setter TargetName="ContentPanel" Property="Orientation" Value="Vertical" />
+                                    <Setter TargetName="ContentPanel" Property="Width" Value="Auto" />
+                                    <Setter TargetName="HeaderSite" Property="Style" Value="{StaticResource MaterialDesignExpanderDownHeaderStyle}" />
+                                </Trigger>
+                            </ControlTemplate.Triggers>
+                        </ControlTemplate>
+                    </Setter.Value>
+                </Setter>
+            </Style>
        </s:ApplicationLoader>
    </Application.Resources>
 </Application>
@@ -1,16 +1,49 @@
 using System;
 using System.Reflection;
+using DiscordChatExporter.Gui.Internal;
+using MaterialDesignThemes.Wpf;

 namespace DiscordChatExporter.Gui
 {
    public partial class App
    {
-        private static readonly Assembly Assembly = typeof(App).Assembly;
+        private static Assembly Assembly { get; } = typeof(App).Assembly;

-        public static string Name => Assembly.GetName().Name!;
+        public static string Name { get; } = Assembly.GetName().Name!;

-        public static Version Version => Assembly.GetName().Version!;
+        public static Version Version { get; } = Assembly.GetName().Version!;

-        public static string VersionString => Version.ToString(3);
+        public static string VersionString { get; } = Version.ToString(3);
+
+        public static string GitHubProjectUrl { get; } = "https://github.com/Tyrrrz/DiscordChatExporter";
+
+        public static string GitHubProjectWikiUrl { get; } = GitHubProjectUrl + "/wiki";
+    }
+
+    public partial class App
+    {
+        private static Theme LightTheme { get; } = Theme.Create(
+            new MaterialDesignLightTheme(),
+            MediaColor.FromHex("#343838"),
+            MediaColor.FromHex("#F9A825")
+        );
+
+        private static Theme DarkTheme { get; } = Theme.Create(
+            new MaterialDesignDarkTheme(),
+            MediaColor.FromHex("#E8E8E8"),
+            MediaColor.FromHex("#F9A825")
+        );
+
+        public static void SetLightTheme()
+        {
+            var paletteHelper = new PaletteHelper();
+            paletteHelper.SetTheme(LightTheme);
+        }
+
+        public static void SetDarkTheme()
+        {
+            var paletteHelper = new PaletteHelper();
+            paletteHelper.SetTheme(DarkTheme);
+        }
    }
 }
@@ -31,9 +31,9 @@ namespace DiscordChatExporter.Gui.Behaviors
        private bool _viewHandled;
        private bool _modelHandled;

-        public IList SelectedItems
+        public IList? SelectedItems
        {
-            get => (IList) GetValue(SelectedItemsProperty);
+            get => (IList?) GetValue(SelectedItemsProperty);
            set => SetValue(SelectedItemsProperty, value);
        }

@@ -13,6 +13,15 @@ namespace DiscordChatExporter.Gui
 {
    public class Bootstrapper : Bootstrapper<RootViewModel>
    {
+        protected override void OnStart()
+        {
+            base.OnStart();
+
+            // Set default theme
+            // (preferred theme will be chosen later, once the settings are loaded)
+            App.SetLightTheme();
+        }
+
        protected override void ConfigureIoC(IStyletIoCBuilder builder)
        {
            base.ConfigureIoC(builder);
@@ -7,7 +7,7 @@ namespace DiscordChatExporter.Gui.Converters
    [ValueConversion(typeof(DateTimeOffset?), typeof(DateTime?))]
    public class DateTimeOffsetToDateTimeConverter : IValueConverter
    {
-        public static DateTimeOffsetToDateTimeConverter Instance { get; } = new DateTimeOffsetToDateTimeConverter();
+        public static DateTimeOffsetToDateTimeConverter Instance { get; } = new();

        public object? Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
@@ -8,7 +8,7 @@ namespace DiscordChatExporter.Gui.Converters
    [ValueConversion(typeof(ExportFormat), typeof(string))]
    public class ExportFormatToStringConverter : IValueConverter
    {
-        public static ExportFormatToStringConverter Instance { get; } = new ExportFormatToStringConverter();
+        public static ExportFormatToStringConverter Instance { get; } = new();

        public object? Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
@@ -18,9 +18,7 @@ namespace DiscordChatExporter.Gui.Converters
            return default(string);
        }

-        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
-        {
-            throw new NotImplementedException();
-        }
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) =>
+            throw new NotSupportedException();
    }
 }
@@ -7,7 +7,7 @@ namespace DiscordChatExporter.Gui.Converters
    [ValueConversion(typeof(bool), typeof(bool))]
    public class InverseBoolConverter : IValueConverter
    {
-        public static InverseBoolConverter Instance { get; } = new InverseBoolConverter();
+        public static InverseBoolConverter Instance { get; } = new();

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
@@ -0,0 +1,28 @@
+using System;
+using System.Globalization;
+using System.Windows.Data;
+
+namespace DiscordChatExporter.Gui.Converters
+{
+    [ValueConversion(typeof(TimeSpan?), typeof(DateTime?))]
+    public class TimeSpanToDateTimeConverter : IValueConverter
+    {
+        public static TimeSpanToDateTimeConverter Instance { get; } = new();
+
+        public object? Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value is TimeSpan timeSpanValue)
+                return DateTime.Today.Add(timeSpanValue);
+
+            return default(DateTime?);
+        }
+
+        public object? ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value is DateTime dateTimeValue)
+                return dateTimeValue.TimeOfDay;
+
+            return default(TimeSpan?);
+        }
+    }
+}
@@ -1,5 +1,4 @@
 <Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">
-  <Import Project="../DiscordChatExporter.props" />

  <PropertyGroup>
    <OutputType>WinExe</OutputType>
@@ -17,12 +16,12 @@
    <PackageReference Include="MaterialDesignColors" Version="1.2.2" />
    <PackageReference Include="MaterialDesignThemes" Version="3.0.1" />
    <PackageReference Include="Microsoft.Xaml.Behaviors.Wpf" Version="1.1.19" />
-    <PackageReference Include="Ookii.Dialogs.Wpf" Version="1.1.0" />
-    <PackageReference Include="Onova" Version="2.6.0" />
-    <PackageReference Include="Stylet" Version="1.3.3" />
+    <PackageReference Include="Ookii.Dialogs.Wpf" Version="3.1.0" />
+    <PackageReference Include="Onova" Version="2.6.2" />
+    <PackageReference Include="Stylet" Version="1.3.5" />
    <PackageReference Include="Tyrrrz.Extensions" Version="1.6.5" />
    <PackageReference Include="Tyrrrz.Settings" Version="1.3.4" />
-    <PackageReference Include="PropertyChanged.Fody" Version="3.2.8" PrivateAssets="all" />
+    <PackageReference Include="PropertyChanged.Fody" Version="3.3.1" PrivateAssets="all" />
  </ItemGroup>

  <ItemGroup>
@@ -11,6 +11,16 @@
                <xs:documentation>Used to control if the On_PropertyName_Changed feature is enabled.</xs:documentation>
              </xs:annotation>
            </xs:attribute>
+            <xs:attribute name="TriggerDependentProperties" type="xs:boolean">
+              <xs:annotation>
+                <xs:documentation>Used to control if the Dependent properties feature is enabled.</xs:documentation>
+              </xs:annotation>
+            </xs:attribute>
+            <xs:attribute name="EnableIsChangedProperty" type="xs:boolean">
+              <xs:annotation>
+                <xs:documentation>Used to control if the IsChanged property feature is enabled.</xs:documentation>
+              </xs:annotation>
+            </xs:attribute>
            <xs:attribute name="EventInvokerNames" type="xs:string">
              <xs:annotation>
                <xs:documentation>Used to change the name of the method that fires the notify event. This is a string that accepts multiple values in a comma separated form.</xs:documentation>
@@ -0,0 +1,9 @@
+using System.Windows.Media;
+
+namespace DiscordChatExporter.Gui.Internal
+{
+    internal static class MediaColor
+    {
+        public static Color FromHex(string hex) => (Color) ColorConverter.ConvertFromString(hex);
+    }
+}
@@ -11,8 +11,7 @@ namespace DiscordChatExporter.Gui.Internal
                UseShellExecute = true
            };

-            using (Process.Start(startInfo))
-            { }
+            using (Process.Start(startInfo)) {}
        }
    }
 }
@@ -6,14 +6,18 @@ namespace DiscordChatExporter.Gui.Services
 {
    public class SettingsService : SettingsManager
    {
-        public string DateFormat { get; set; } = "dd-MMM-yy hh:mm tt";
-
        public bool IsAutoUpdateEnabled { get; set; } = true;

+        public bool IsDarkModeEnabled { get; set; }
+
        public bool IsTokenPersisted { get; set; } = true;

+        public string DateFormat { get; set; } = "dd-MMM-yy hh:mm tt";
+
        public int ParallelLimit { get; set; } = 1;

+        public bool ShouldReuseMedia { get; set; }
+
        public AuthToken? LastToken { get; set; }

        public ExportFormat LastExportFormat { get; set; } = ExportFormat.HtmlDark;
@@ -10,7 +10,8 @@ namespace DiscordChatExporter.Gui.Services
    {
        private readonly IUpdateManager _updateManager = new UpdateManager(
            new GithubPackageResolver("Tyrrrz", "DiscordChatExporter", "DiscordChatExporter.zip"),
-            new ZipPackageExtractor());
+            new ZipPackageExtractor()
+        );

        private readonly SettingsService _settingsService;

@@ -1,8 +1,10 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using DiscordChatExporter.Domain.Discord;
 using DiscordChatExporter.Domain.Discord.Models;
 using DiscordChatExporter.Domain.Exporting;
+using DiscordChatExporter.Domain.Utilities;
 using DiscordChatExporter.Gui.Services;
 using DiscordChatExporter.Gui.ViewModels.Framework;

@@ -26,9 +28,23 @@ namespace DiscordChatExporter.Gui.ViewModels.Dialogs

        public ExportFormat SelectedFormat { get; set; }

-        public DateTimeOffset? After { get; set; }
+        // This date/time abomination is required because we use separate controls to set these

-        public DateTimeOffset? Before { get; set; }
+        public DateTimeOffset? AfterDate { get; set; }
+
+        public bool IsAfterDateSet => AfterDate != null;
+
+        public TimeSpan? AfterTime { get; set; }
+
+        public DateTimeOffset? After => AfterDate?.Add(AfterTime ?? TimeSpan.Zero);
+
+        public DateTimeOffset? BeforeDate { get; set; }
+
+        public bool IsBeforeDateSet => BeforeDate != null;
+
+        public TimeSpan? BeforeTime { get; set; }
+
+        public DateTimeOffset? Before => BeforeDate?.Add(BeforeTime ?? TimeSpan.Zero);

        public int? PartitionLimit { get; set; }

@@ -60,17 +76,17 @@ namespace DiscordChatExporter.Gui.ViewModels.Dialogs
            _settingsService.LastPartitionLimit = PartitionLimit;
            _settingsService.LastShouldDownloadMedia = ShouldDownloadMedia;

-            // Clamp 'after' and 'before' values
-            if (After > Before)
-                After = Before;
-            if (Before < After)
-                Before = After;
-
            // If single channel - prompt file path
-            if (IsSingleChannel)
+            if (Channels != null && IsSingleChannel)
            {
                var channel = Channels.Single();
-                var defaultFileName = ExportRequest.GetDefaultOutputFileName(Guild!, channel, SelectedFormat, After, Before);
+                var defaultFileName = ExportRequest.GetDefaultOutputFileName(
+                    Guild!,
+                    channel,
+                    SelectedFormat,
+                    After?.Pipe(Snowflake.FromDate),
+                    Before?.Pipe(Snowflake.FromDate)
+                );

                // Filter
                var ext = SelectedFormat.GetFileExtension();
@@ -84,11 +100,24 @@ namespace DiscordChatExporter.Gui.ViewModels.Dialogs
                OutputPath = _dialogManager.PromptDirectoryPath();
            }

-            // If canceled - return
            if (string.IsNullOrWhiteSpace(OutputPath))
                return;

            Close(true);
        }
    }
+
+    public static class ExportSetupViewModelExtensions
+    {
+        public static ExportSetupViewModel CreateExportSetupViewModel(this IViewModelFactory factory,
+            Guild guild, IReadOnlyList<Channel> channels)
+        {
+            var viewModel = factory.CreateExportSetupViewModel();
+
+            viewModel.Guild = guild;
+            viewModel.Channels = channels;
+
+            return viewModel;
+        }
+    }
 }
@@ -8,29 +8,41 @@ namespace DiscordChatExporter.Gui.ViewModels.Dialogs
    {
        private readonly SettingsService _settingsService;

-        public string DateFormat
-        {
-            get => _settingsService.DateFormat;
-            set => _settingsService.DateFormat = value;
-        }
-
        public bool IsAutoUpdateEnabled
        {
            get => _settingsService.IsAutoUpdateEnabled;
            set => _settingsService.IsAutoUpdateEnabled = value;
        }

+        public bool IsDarkModeEnabled
+        {
+            get => _settingsService.IsDarkModeEnabled;
+            set => _settingsService.IsDarkModeEnabled = value;
+        }
+
        public bool IsTokenPersisted
        {
            get => _settingsService.IsTokenPersisted;
            set => _settingsService.IsTokenPersisted = value;
        }

+        public string DateFormat
+        {
+            get => _settingsService.DateFormat;
+            set => _settingsService.DateFormat = value;
+        }
+
        public int ParallelLimit
        {
            get => _settingsService.ParallelLimit;
            set => _settingsService.ParallelLimit = value.Clamp(1, 10);
        }
+        
+        public bool ShouldReuseMedia
+        {
+            get => _settingsService.ShouldReuseMedia;
+            set => _settingsService.ShouldReuseMedia = value;
+        }

        public SettingsViewModel(SettingsService settingsService)
        {
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Tyrrrz	f22b048d32	Update version	2021-02-06 21:22:42 +02:00
Lucas LaBuff	a8031ad3aa	Fix crash when parsing position on DM channels (#496 )	2021-02-06 17:00:29 +02:00
Frederic Portaria-Janicki	e49cf997ea	[CLI] Fix missing channel category bug when API returns empty string (#492 )	2021-02-02 14:42:04 +02:00
Lucas LaBuff	8b9afe45b9	[CLI] Fix sorting by channel/category position (#490 )	2021-01-31 17:23:46 +02:00
Lucas LaBuff	77b7977324	Formatting output paths (#472 )	2021-01-28 22:01:13 +02:00
Lucas LaBuff	915f4c8d9f	Fix crash on encountering invalid snowflake (#479 )	2021-01-18 19:21:22 +02:00
Tyrrrz	0872d6d44b	Update screenshots	2020-12-29 21:06:45 +02:00
Tyrrrz	3aa90bb27b	Update version	2020-12-29 21:02:46 +02:00
Tyrrrz	51acffc92e	[HTML] Fix up replies	2020-12-29 20:49:34 +02:00
Tyrrrz	39a33538fe	Cleanup last PR	2020-12-28 22:10:46 +02:00
Sanqui	07ac805677	Add support for replies (#455 )	2020-12-28 22:03:30 +02:00
Alexey Golub	097a75e326	Update readme	2020-12-28 18:38:22 +02:00
Tyrrrz	3d9ee3b339	Embrace Snowflake as first class citizen	2020-12-27 19:42:21 +02:00
multisignature	4ff7990967	Fix grammar in readme (#466 )	2020-12-23 21:00:33 +02:00
Andrew Kolos	730fed075f	[CLI] Allow passing after and before message ids instead of dates (#462 )	2020-12-22 17:41:40 +02:00
Alexey Golub	600c354ab2	Use Discord API v8	2020-12-19 18:37:38 +02:00
Alexey Golub	d8dc12b3f7	Update readme	2020-12-19 18:22:03 +02:00
Alexey Golub	33a6d49d76	Use .NET 5.0 SDK in Docker	2020-12-19 18:11:31 +02:00
Tyrrrz	3861dba60c	Refactor last PR	2020-12-17 17:49:35 +02:00
Andrew Kolos	69acb5bf76	Set last write time on downloaded media to the value provided in the Last-Modified header (#459 )	2020-12-17 17:13:47 +02:00
Tyrrrz	0e67dcbf2e	Update readme	2020-12-15 17:47:00 +02:00
Tyrrrz	45d2be549d	Install dotnet 5 on CI/CD so that source generators work	2020-12-15 16:17:37 +02:00
Tyrrrz	9394824943	Update MiniRazor to use build-time template compilation	2020-12-15 03:44:13 +02:00
Sanqui	43c50324d8	[JSON] Don't escape Unicode characters when possible (#453 ) While UnsafeRelaxedJsonEscaping sounds scary, there is no risk here since the JSON data is saved directly into a file. See #450	2020-12-14 21:57:48 +02:00
Alexey Golub	a6353de2a7	Use preview language version	2020-12-14 18:48:34 +02:00
Sanqui	d020652f50	[CLI] Display channel name for errors during ExportMultipleAsync (#452 )	2020-12-14 18:48:11 +02:00
Tyrrrz	63803f98aa	Use C#9 features	2020-12-14 17:45:42 +02:00
Tyrrrz	9dda9cfc27	Use floating dotnet versions on CI/CD	2020-12-14 17:37:49 +02:00
Tyrrrz	61d0ddeced	Update project structure	2020-12-10 16:52:05 +02:00
Tyrrrz	4c64977b71	Expect null result in WaitAndRetry logic in http retry handler Fixes #447	2020-12-07 16:24:33 +02:00
Tyrrrz	8bc5b547ef	Remove gitattributes and simplify gitignore	2020-12-07 16:23:53 +02:00
Lucas LaBuff	286981d9f8	[HTML] Prettier attachment preview for non-media files (#448 )	2020-12-07 16:20:38 +02:00
Tyrrrz	5a62ce6af9	Update JsonExtensions to 1.0.1	2020-11-29 00:42:05 +02:00
Tyrrrz	d72fe594b4	Use JsonExtensions package	2020-11-29 00:17:58 +02:00
Tyrrrz	9df98b0405	Update version	2020-11-23 17:04:08 +02:00
Tyrrrz	0d2b9e8bc0	Refactor last PR	2020-11-23 16:53:22 +02:00
Andrew Kolos	53cebd82eb	[CLI] Print error and exit if reuse-media option is used without media option (#433 )	2020-11-22 20:45:19 +02:00
Tyrrrz	37fcee2f21	Fix relative path extraction in ExportContext when base directory is empty Fixes #437 Fixes #434	2020-11-20 16:56:30 +02:00
Tyrrrz	047dccef7f	Refactor last PR	2020-11-18 19:04:53 +02:00
sas41	cb47902d10	[HTML] Rich rendering support for audio and video embeds (#432 )	2020-11-16 15:49:57 +02:00
Alexey Golub	dca8b8ceb2	Update .NET runtime links	2020-11-11 15:23:43 +02:00
Tyrrrz	a8e7c85b99	Update docker image references	2020-11-11 01:56:53 +02:00
Tyrrrz	edd51e0838	Revert last change, .net5 doesn't work	2020-11-11 00:02:56 +02:00
Tyrrrz	5e04accdff	Update build infra	2020-11-10 23:58:05 +02:00
Andrew Kolos	547bf0a463	[JSON] Add core user mentions to output (#416 )	2020-10-25 23:00:30 +02:00
Tyrrrz	948fab7c86	Update readme	2020-10-25 01:53:32 +03:00
Tyrrrz	5038b8541e	Update version	2020-10-24 21:26:34 +03:00
Tyrrrz	1da80956dd	Refactor	2020-10-24 21:15:58 +03:00
Tyrrrz	0763a99765	[JSON] Fix incorrect embed color output	2020-10-24 17:45:54 +03:00
Tyrrrz	eda5b21684	Update github actions	2020-10-24 00:02:32 +03:00
Tyrrrz	2c7b054c24	Update nuget packages	2020-10-24 00:02:32 +03:00
Andrew Kolos	520e023aff	Stop redundantly downloading media when re-exporting (#395 )	2020-10-23 16:38:15 +03:00
Alexey Golub	949c9d3f1e	Update readme	2020-10-17 20:25:21 +03:00
Andrew Kolos	fa825fce47	[GUI] Fix content bg color on first screen to match the second screen (#411 )	2020-10-16 14:20:58 +03:00
Andrew Kolos	09acfcff59	Add retry policy to MediaDownloader to accommodate short network outages during download (#404 )	2020-10-12 23:03:14 +03:00
Andrew Kolos	ddb4856516	Add "unix" and "unixms" options for date format (#405 )	2020-10-12 13:41:49 +03:00
Andrew Kolos	c4007d4a80	[JSON] Add embed color (#403 )	2020-10-10 16:10:56 +03:00
Alexey Golub	2a432c0ed2	Treat nullability warnings as errors	2020-10-07 15:33:59 +03:00
Alexey Golub	c5eeb5f464	Update nuget packages	2020-10-07 15:33:47 +03:00
Alexey Golub	a6bf546e79	[GUI] Clean up the UI	2020-10-05 17:41:09 +03:00
Alexey Golub	239c47c06e	[GUI] Clean up theme management	2020-10-05 17:10:00 +03:00
Andrew Kolos	19f678ca01	[GUI] Add dark theme (#388 )	2020-10-05 16:31:37 +03:00
Pegasis	08442f21b7	Add AUR package to README (#379 )	2020-09-20 15:52:44 +03:00
Alexey Golub	921f348769	Update version	2020-09-14 15:37:36 +03:00
Alexey Golub	a25e809671	Extend try/catch in media downloading to OperationCanceledException Closes #372	2020-09-14 15:09:57 +03:00
Alexey Golub	fa80c82468	Cleanup	2020-09-05 17:10:15 +03:00
Alexey Golub	91f4f02a35	Refactor last commit	2020-09-05 17:05:18 +03:00
wyattscarpenter	6d2880ce26	[CLI] Add command to export all channels across all guilds (#373 )	2020-09-05 00:23:06 +03:00
Ahmed Massoud	355b8cb8cf	Add call time for call status messages (#365 )	2020-08-22 22:14:13 +03:00
Alexey Golub	82945ac3cf	[HTML] Use CDN for Whitney fonts Related to #322	2020-08-21 20:36:59 +03:00
Alexey Golub	5009b90a3e	Update screenshots	2020-08-15 13:47:47 +03:00
Alexey Golub	1495ed9b90	Update version	2020-08-12 19:21:24 +03:00
Alexey Golub	be66c74c08	Update nuget packages	2020-08-12 19:11:18 +03:00
Alexey Golub	6f54c09d96	[GUI] Refactor sorting	2020-08-12 19:09:12 +03:00
Alexey Golub	45926b0990	Refactor last commit	2020-08-07 21:41:10 +03:00
CarJem Generations	25d29dc079	[GUI] Add controls to configure export time limits in addition to dates (#355 )	2020-08-07 21:06:49 +03:00
Alexey Golub	efde9931c9	Refactor & optimize changes in last commit	2020-08-07 21:00:43 +03:00
CarJem Generations	2c3b461d49	[GUI] Make categories collapsible in channel list (#354 )	2020-08-07 19:42:59 +03:00
CarJem Generations	b405052fd6	[HTML] Workaround for Tupperbox nicknames (#352 )	2020-08-05 21:58:17 +03:00
Alexey Golub	da6d903f36	Update version	2020-07-30 16:03:27 +03:00
Alexey Golub	e1b1755fba	Don't escape media URL on non-HTML formats	2020-07-30 16:02:00 +03:00
Alexey Golub	1ff026eba6	[GUI] Trim spaces in token input	2020-07-29 20:58:49 +03:00
Alexey Golub	1fe4ecb3af	Truncate long file names in MediaDownloader Fixes #344	2020-07-29 20:58:38 +03:00
Alexey Golub	47a1518cd9	Update nuget packages	2020-07-29 20:49:08 +03:00
Alexey Golub	d78c10ebb7	Remove default cap on MakeUniqueFilePath	2020-07-29 20:47:58 +03:00
Alexey Golub	3db29b520c	Switch from RazorLight to MiniRazor	2020-07-29 20:08:51 +03:00
Alexey Golub	752003abc3	Fix media downloading	2020-07-28 23:07:31 +03:00
Alexey Golub	e26a0660d1	Use Razor instead of Scriban	2020-07-28 22:43:45 +03:00
Alexey Golub	7dfc3b2723	Add link to extra services in readme	2020-07-26 15:54:30 +03:00
Alexey Golub	06c33373de	Sanitize file names when exporting media Fixes #332	2020-07-25 21:17:05 +03:00
Alexey Golub	563f5cb67b	Update version	2020-07-19 19:09:45 +03:00
Alexey Golub	1f20915b4d	Use original file names for downloaded media Closes #327	2020-07-19 14:19:40 +03:00
Alexey Golub	e58c7aefff	Ignore failures when downloading media	2020-07-18 22:08:06 +03:00