Update version

Related to #929

.gitignore

@@ -5,6 +5,7 @@
 *.sln.docstates
 .idea/
 .vs/
+.vscode/
 
 # Build results
 [Dd]ebug/

Changelog.md

@@ -1,3 +1,9 @@
+### v2.36 (16-Sep-2022)
+
+- [HTML] Added support for rendering GIFV embeds. They will now render as videos that automatically play when you hover your mouse over them. (Thanks [@gan-of-culture](https://github.com/gan-of-culture))
+- [HTML] Added support for rendering system notification messages, such as when a user joins a server or when a messages gets pinned. Previously, such messages were rendered as regular text messages, but now they look similar to how they're presented in the Discord client. (Thanks [@gan-of-culture](https://github.com/gan-of-culture))
+- [CLI] Improved the wording of the error message that's shown when exporting multiple channels and the provided output path is ambiguous. It now mentions that you can resolve the ambiguity by adding a slash at the end of the path.
+
 ### v2.35.2 (08-Sep-2022)
 
 - Updated usage guide to mention the need to enable "Message Content Intent" to use a bot as a medium for exporting messages.

Directory.Build.props

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>net6.0</TargetFramework>
-    <Version>2.35.2</Version>
+    <Version>2.36</Version>
     <Company>Tyrrrz</Company>
     <Copyright>Copyright (c) Oleksii Holub</Copyright>
     <LangVersion>preview</LangVersion>

DiscordChatExporter.Cli.Tests/Specs/HtmlWriting/EmbedSpecs.cs

@@ -54,8 +54,9 @@ public class EmbedSpecs : IClassFixture<ExportWrapperFixture>
         message
             .QuerySelectorAll("img")
             .Select(e => e.GetAttribute("src"))
+            .Where(s => s?.EndsWith("i.redd.it/f8w05ja8s4e61.png") ?? false)
             .Should()
-            .Contain("https://i.redd.it/f8w05ja8s4e61.png");
+            .ContainSingle();
     }
 
     [Fact]
@@ -74,6 +75,38 @@ public class EmbedSpecs : IClassFixture<ExportWrapperFixture>
         content.Should().BeNullOrEmpty();
     }
 
+    [Fact]
+    public async Task Message_containing_a_gifv_link_is_rendered_with_a_video_embed()
+    {
+        // Act
+        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+            ChannelIds.EmbedTestCases,
+            Snowflake.Parse("1019234520349814794")
+        );
+
+        // Assert
+        message
+            .QuerySelectorAll("source")
+            .Select(e => e.GetAttribute("src"))
+            .Where(s => s?.EndsWith("media.tenor.com/DDAJeW6BQKkAAAPo/tooncasm-test-copy.mp4") ?? false)
+            .Should()
+            .ContainSingle();
+    }
+
+    [Fact]
+    public async Task Message_containing_a_gifv_link_and_nothing_else_is_rendered_without_text_content()
+    {
+        // Act
+        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+            ChannelIds.EmbedTestCases,
+            Snowflake.Parse("1019234520349814794")
+        );
+
+        // Assert
+        var content = message.QuerySelector(".chatlog__content")?.Text();
+        content.Should().BeNullOrEmpty();
+    }
+
     [Fact]
     public async Task Message_containing_a_Spotify_track_link_is_rendered_with_a_track_embed()
     {

DiscordChatExporter.Cli/Commands/Base/ExportCommandBase.cs

@@ -121,7 +121,8 @@ public abstract class ExportCommandBase : TokenCommandBase
         if (!isValidOutputPath)
         {
             throw new CommandException(
-                "Attempted to export multiple channels, but the output path is neither a directory nor a template."
+                "Attempted to export multiple channels, but the output path is neither a directory nor a template. " +
+                "If the provided output path is meant to be treated as a directory, make sure it ends with a slash."
             );
         }
 

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

@@ -11,6 +11,7 @@ namespace DiscordChatExporter.Core.Discord.Data.Embeds;
 // https://discord.com/developers/docs/resources/channel#embed-object
 public partial record Embed(
     string? Title,
+    EmbedKind Kind,
     string? Url,
     DateTimeOffset? Timestamp,
     Color? Color,
@@ -19,11 +20,9 @@ public partial record Embed(
     IReadOnlyList<EmbedField> Fields,
     EmbedImage? Thumbnail,
     IReadOnlyList<EmbedImage> Images,
+    EmbedVideo? Video,
     EmbedFooter? Footer)
 {
-    public PlainImageEmbedProjection? TryGetPlainImage() =>
-        PlainImageEmbedProjection.TryResolve(this);
-
     public SpotifyTrackEmbedProjection? TryGetSpotifyTrack() =>
         SpotifyTrackEmbedProjection.TryResolve(this);
 
@@ -36,9 +35,20 @@ public partial record Embed
     public static Embed Parse(JsonElement json)
     {
         var title = json.GetPropertyOrNull("title")?.GetStringOrNull();
+
+        var kind =
+            json.GetPropertyOrNull("type")?.GetStringOrNull()?.Pipe(s => Enum.Parse<EmbedKind>(s, true)) ??
+            EmbedKind.Rich;
+
         var url = json.GetPropertyOrNull("url")?.GetNonWhiteSpaceStringOrNull();
         var timestamp = json.GetPropertyOrNull("timestamp")?.GetDateTimeOffset();
-        var color = json.GetPropertyOrNull("color")?.GetInt32OrNull()?.Pipe(System.Drawing.Color.FromArgb).ResetAlpha();
+
+        var color = json
+            .GetPropertyOrNull("color")?
+            .GetInt32OrNull()?
+            .Pipe(System.Drawing.Color.FromArgb)
+            .ResetAlpha();
+
         var author = json.GetPropertyOrNull("author")?.Pipe(EmbedAuthor.Parse);
         var description = json.GetPropertyOrNull("description")?.GetStringOrNull();
 
@@ -59,10 +69,13 @@ public partial record Embed
             json.GetPropertyOrNull("image")?.Pipe(EmbedImage.Parse).Enumerate().ToArray() ??
             Array.Empty<EmbedImage>();
 
+        var video = json.GetPropertyOrNull("video")?.Pipe(EmbedVideo.Parse);
+
         var footer = json.GetPropertyOrNull("footer")?.Pipe(EmbedFooter.Parse);
 
         return new Embed(
             title,
+            kind,
             url,
             timestamp,
             color,
@@ -71,6 +84,7 @@ public partial record Embed
             fields,
             thumbnail,
             images,
+            video,
             footer
         );
     }

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

@@ -0,0 +1,12 @@
+namespace DiscordChatExporter.Core.Discord.Data.Embeds;
+
+// https://discord.com/developers/docs/resources/channel#embed-object-embed-types
+public enum EmbedKind
+{
+    Rich,
+    Image,
+    Video,
+    Gifv,
+    Article,
+    Link
+}

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

@@ -0,0 +1,22 @@
+using JsonExtensions.Reading;
+using System.Text.Json;
+
+namespace DiscordChatExporter.Core.Discord.Data.Embeds;
+
+// https://discord.com/developers/docs/resources/channel#embed-object-embed-video-structure
+public record EmbedVideo(
+    string? Url,
+    string? ProxyUrl,
+    int? Width,
+    int? Height)
+{
+    public static EmbedVideo Parse(JsonElement json)
+    {
+        var url = json.GetPropertyOrNull("url")?.GetNonWhiteSpaceStringOrNull();
+        var proxyUrl = json.GetPropertyOrNull("proxy_url")?.GetNonWhiteSpaceStringOrNull();
+        var width = json.GetPropertyOrNull("width")?.GetInt32OrNull();
+        var height = json.GetPropertyOrNull("height")?.GetInt32OrNull();
+
+        return new EmbedVideo(url, proxyUrl, width, height);
+    }
+}

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

@@ -1,33 +0,0 @@
-using System.IO;
-using System.Linq;
-using System.Text.RegularExpressions;
-using DiscordChatExporter.Core.Utils;
-
-namespace DiscordChatExporter.Core.Discord.Data.Embeds;
-
-public record PlainImageEmbedProjection(string Url)
-{
-    public static PlainImageEmbedProjection? TryResolve(Embed embed)
-    {
-        if (string.IsNullOrWhiteSpace(embed.Url))
-            return null;
-
-        // Has to be an embed without any data (except URL and image)
-        if (!string.IsNullOrWhiteSpace(embed.Title) ||
-            embed.Timestamp is not null ||
-            embed.Author is not null ||
-            !string.IsNullOrWhiteSpace(embed.Description) ||
-            embed.Fields.Any() ||
-            embed.Footer is not null)
-        {
-            return null;
-        }
-
-        // Has to be an image file
-        var fileName = Regex.Match(embed.Url, @".+/([^?]*)").Groups[1].Value;
-        if (string.IsNullOrWhiteSpace(fileName) || !FileFormat.IsImage(Path.GetExtension(fileName)))
-            return null;
-
-        return new PlainImageEmbedProjection(embed.Url);
-    }
-}

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

@@ -21,6 +21,9 @@ public partial record SpotifyTrackEmbedProjection
 
     public static SpotifyTrackEmbedProjection? TryResolve(Embed embed)
     {
+        if (embed.Kind != EmbedKind.Link)
+            return null;
+
         if (string.IsNullOrWhiteSpace(embed.Url))
             return null;
 

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

@@ -42,6 +42,9 @@ public partial record YouTubeVideoEmbedProjection
 
     public static YouTubeVideoEmbedProjection? TryResolve(Embed embed)
     {
+        if (embed.Kind != EmbedKind.Video)
+            return null;
+
         if (string.IsNullOrWhiteSpace(embed.Url))
             return null;
 

DiscordChatExporter.Core/Discord/Data/Message.cs

@@ -44,7 +44,7 @@ public record Message(
         {
             var embed = embeds[i];
 
-            if (embed.Url?.Contains("://twitter.com/") == true)
+            if (embed.Url?.Contains("://twitter.com/", StringComparison.OrdinalIgnoreCase) == true)
             {
                 // Find embeds with the same URL that only contain a single image and nothing else
                 var trailingEmbeds = embeds
@@ -107,6 +107,7 @@ public record Message(
             MessageKind.ChannelNameChange => "Changed the channel name.",
             MessageKind.ChannelIconChange => "Changed the channel icon.",
             MessageKind.ChannelPinnedMessage => "Pinned a message.",
+            MessageKind.ThreadCreated => "Started a thread.",
             MessageKind.GuildMemberJoin => "Joined the server.",
             _ => json.GetPropertyOrNull("content")?.GetStringOrNull() ?? ""
         };

DiscordChatExporter.Core/Discord/Data/MessageKind.cs

@@ -11,5 +11,12 @@ public enum MessageKind
     ChannelIconChange = 5,
     ChannelPinnedMessage = 6,
     GuildMemberJoin = 7,
+    ThreadCreated = 18,
     Reply = 19
 }
+
+public static class MessageKindExtensions
+{
+    public static bool IsSystemNotification(this MessageKind c) =>
+        c is not MessageKind.Default and not MessageKind.Reply;
+}

DiscordChatExporter.Core/DiscordChatExporter.Core.csproj

@@ -7,7 +7,7 @@
   <ItemGroup>
     <PackageReference Include="Gress" Version="2.0.1" />
     <PackageReference Include="JsonExtensions" Version="1.2.0" />
-    <PackageReference Include="MiniRazor.CodeGen" Version="2.2.1" />
+    <PackageReference Include="MiniRazor.CodeGen" Version="2.2.2" />
     <PackageReference Include="Polly" Version="7.2.3" />
     <PackageReference Include="Superpower" Version="3.0.0" />
     <PackageReference Include="WebMarkupMin.Core" Version="2.12.0" />

DiscordChatExporter.Core/Exporting/Writers/Html/MessageExtensions.cs

@@ -0,0 +1,22 @@
+using System;
+using DiscordChatExporter.Core.Discord.Data;
+using DiscordChatExporter.Core.Discord.Data.Embeds;
+
+namespace DiscordChatExporter.Core.Exporting.Writers.Html;
+
+internal static class MessageExtensions
+{
+    // Message content is hidden if it's a link to an embedded media
+    // https://github.com/Tyrrrz/DiscordChatExporter/issues/682
+    public static bool IsContentHidden(this Message message)
+    {
+        if (message.Embeds.Count != 1)
+            return false;
+
+        var embed = message.Embeds[0];
+
+        return
+            string.Equals(message.Content.Trim(), embed.Url, StringComparison.OrdinalIgnoreCase) &&
+            embed.Kind is EmbedKind.Image or EmbedKind.Gifv;
+    }
+}

DiscordChatExporter.Core/Exporting/Writers/Html/MessageGroupTemplate.cshtml

@@ -48,19 +48,48 @@
 {
     var isFirst = i == 0;
 
-    // Hide message content if it only contains a link to an image which is embedded, and nothing else
-    var isContentHidden =
-        message.Embeds.Count == 1 &&
-        message.Content.Trim() == PlainImageEmbedProjection.TryResolve(message.Embeds.Single())?.Url;
-
-    var isReferencedContentHidden =
-        message.ReferencedMessage is not null &&
-        message.ReferencedMessage.Embeds.Count == 1 &&
-        message.ReferencedMessage.Content.Trim() == PlainImageEmbedProjection.TryResolve(message.ReferencedMessage.Embeds.Single())?.Url;
-
     <div id="chatlog__message-container-@message.Id" class="chatlog__message-container @(message.IsPinned ? "chatlog__message-container--pinned" : null)" data-message-id="@message.Id">
         <div class="chatlog__message">
-            @{/* Left side */}
+            @{/* System notification */}
+            @if (message.Kind.IsSystemNotification())
+            {
+                // System notifications are grouped even if the message author is different.
+                // That's why we have to update the user values with the author of the current message.
+                userMember = Model.ExportContext.TryGetMember(message.Author.Id);
+                userColor = Model.ExportContext.TryGetUserColor(message.Author.Id);
+                userNick = message.Author.IsBot
+                    ? message.Author.Name
+                    : userMember?.Nick ?? message.Author.Name;
+
+                <div class="chatlog__message-aside">
+                    <svg class=chatlog__system-notification-icon><use href="#@message.Kind.ToString().ToDashCase().ToLowerInvariant()-icon"></use></svg>
+                </div>
+
+                <div class="chatlog__message-primary">
+                    <div class="chatlog__header">
+                        @{/* Author name */}
+                        <span class="chatlog__author" style="@(userColor is not null ? $"color: rgb({userColor.Value.R}, {userColor.Value.G}, {userColor.Value.B})" : null)" title="@message.Author.FullName" data-user-id="@message.Author.Id">@userNick</span>
+
+                        @{/* System notification content */}
+                        @if(message.Kind == MessageKind.ChannelPinnedMessage)
+                        {
+                            <span class="chatlog__system-notification"> pinned</span>
+                            <span class="chatlog__system-notification-reference-link chatlog__reference-link" onclick="scrollToMessage(event, '@message.Reference?.MessageId')"> a message</span>
+                            <span class="chatlog__system-notification"> to this channel.</span>
+                        }
+                        else
+                        {
+                            <span class="chatlog__system-notification">@(char.ToLowerInvariant(message.Content[0]) + message.Content[1..])</span>
+                        }
+
+                        @{/* Timestamp */}
+                        <span class="chatlog__timestamp"><a href="#chatlog__message-container-@message.Id">@FormatDate(message.Timestamp)</a></span>
+                    </div>
+                </div>
+            }
+            // Regular message
+            else
+            {
                 <div class="chatlog__message-aside">
                     @if (isFirst)
                     {
@@ -79,7 +108,6 @@
                     }
                 </div>
 
-            @{/* Right side */}
                 <div class="chatlog__message-primary">
                     @if (isFirst)
                     {
@@ -93,7 +121,7 @@
                                     <div class="chatlog__reference-author" style="@(referencedUserColor is not null ? $"color: rgb({referencedUserColor.Value.R}, {referencedUserColor.Value.G}, {referencedUserColor.Value.B})" : null)" title="@message.ReferencedMessage.Author.FullName">@referencedUserNick</div>
                                     <div class="chatlog__reference-content">
                                         <span class="chatlog__reference-link" onclick="scrollToMessage(event, '@message.ReferencedMessage.Id')">
-                                        @if (!string.IsNullOrWhiteSpace(message.ReferencedMessage.Content) && !isReferencedContentHidden)
+                                            @if (!string.IsNullOrWhiteSpace(message.ReferencedMessage.Content) && !message.ReferencedMessage.IsContentHidden())
                                             {
                                                 <!--wmm:ignore-->@Raw(FormatEmbedMarkdown(message.ReferencedMessage.Content))<!--/wmm:ignore-->
                                             }
@@ -144,7 +172,7 @@
                     {
                         <div class="chatlog__content chatlog__markdown">
                             @{/* Text */}
-                        @if (!isContentHidden)
+                            @if (!message.IsContentHidden())
                             {
                                 <span class="chatlog__markdown-preserve"><!--wmm:ignore-->@Raw(FormatMarkdown(message.Content))<!--/wmm:ignore--></span>
                             }
@@ -208,17 +236,8 @@
                     @{/* Embeds */}
                     @foreach (var embed in message.Embeds)
                     {
-                    // Plain image embed
-                    if (embed.TryGetPlainImage() is { } plainImageEmbed)
-                    {
-                        <div class="chatlog__embed">
-                            <a href="@await ResolveUrlAsync(plainImageEmbed.Url)">
-                                <img class="chatlog__embed-plainimage" src="@await ResolveUrlAsync(plainImageEmbed.Url)" alt="Embedded image" loading="lazy">
-                            </a>
-                        </div>
-                    }
                         // Spotify embed
-                    else if (embed.TryGetSpotifyTrack() is { } spotifyTrackEmbed)
+                        if (embed.TryGetSpotifyTrack() is { } spotifyTrackEmbed)
                         {
                             <div class="chatlog__embed">
                                 <div class="chatlog__embed-spotify-container">
@@ -294,7 +313,25 @@
                                 </div>
                             </div>
                         }
-                    // Generic embed
+                        // Generic image embed
+                        else if (embed.Kind == EmbedKind.Image && !string.IsNullOrWhiteSpace(embed.Url))
+                        {
+                            <div class="chatlog__embed">
+                                <a href="@await ResolveUrlAsync(embed.Url)">
+                                    <img class="chatlog__embed-generic-image" src="@await ResolveUrlAsync(embed.Url)" alt="Embedded image" loading="lazy">
+                                </a>
+                            </div>
+                        }
+                        // Generic gifv embed
+                        else if (embed.Kind == EmbedKind.Gifv && !string.IsNullOrWhiteSpace(embed.Video?.Url))
+                        {
+                            <div class="chatlog__embed">
+                                <video class="chatlog__embed-generic-gifv" loop width="@embed.Video.Width" height="@embed.Video.Height" onmouseover="this.play()" onmouseout="this.pause()">
+                                    <source src="@await ResolveUrlAsync(embed.Video.ProxyUrl ?? embed.Video.Url)" alt="Embedded video">
+                                </video>
+                            </div>
+                        }
+                        // Rich embed
                         else
                         {
                             <div class="chatlog__embed">
@@ -480,6 +517,7 @@
                         </div>
                     }
                 </div>
+            }
         </div>
     </div>
 }

DiscordChatExporter.Core/Exporting/Writers/Html/PreambleTemplate.cshtml

@@ -254,6 +254,20 @@
             unicode-bidi: bidi-override;
         }
 
+        .chatlog__system-notification {
+            color: @Themed("#96989d", "#5e6772")
+        }
+
+        .chatlog__system-notification-reference-link {
+            font-weight: 500;
+            color: @Themed("#ffffff", "#2f3136");
+        }
+
+        .chatlog__system-notification-icon {
+            width: 18px;
+            height: 18px;
+        }
+
         .chatlog__header {
             margin-bottom: 0.1rem;
         }
@@ -540,7 +554,14 @@
             font-weight: 500;
         }
 
-        .chatlog__embed-plainimage {
+        .chatlog__embed-generic-image {
+            max-width: 45vw;
+            max-height: 500px;
+            vertical-align: top;
+            border-radius: 3px;
+        }
+
+        .chatlog__embed-generic-gifv {
             max-width: 45vw;
             max-height: 500px;
             vertical-align: top;
@@ -779,13 +800,24 @@
     </script>
 
     @{/* Icons */}
-    <svg style="display: none">
+    <svg style="display: none" xmlns="http://www.w3.org/2000/svg">
+        <defs>
             <symbol id="attachment-icon" viewBox="0 0 720 960">
-            <path fill="#f4f5fb" d="M50,935a25,25,0,0,1-25-25V50A25,25,0,0,1,50,25H519.6L695,201.32V910a25,25,0,0,1-25,25Z"/>
+                <path fill="#f4f5fb" d="M50,935a25,25,0,0,1-25-25V50A25,25,0,0,1,50,25H519.6L695,201.32V910a25,25,0,0,1-25,25Z" />
-            <path fill="#7789c4" d="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"/>
+                <path fill="#7789c4" d="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" />
-            <path fill="#f4f5fb" d="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"/>
+                <path fill="#f4f5fb" d="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" />
-            <path fill="#7789c4" d="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"/>
+                <path fill="#7789c4" d="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" />
             </symbol>
+            <symbol id="channel-pinned-message-icon" viewBox="0 0 18 18">
+                <path fill="#b9bbbe" d="m16.908 8.39684-8.29587-8.295827-1.18584 1.184157 1.18584 1.18584-4.14834 4.1475v.00167l-1.18583-1.18583-1.185 1.18583 3.55583 3.55502-4.740831 4.74 1.185001 1.185 4.74083-4.74 3.55581 3.555 1.185-1.185-1.185-1.185 4.1475-4.14836h.0009l1.185 1.185z" />
+            </symbol>
+            <symbol id="call-icon" viewBox="0 0 18 18">
+                <path fill="#3ba55c" fill-rule="evenodd" d="M17.7163041 15.36645368c-.0190957.02699568-1.9039523 2.6680735-2.9957762 2.63320406-3.0676659-.09785935-6.6733809-3.07188394-9.15694343-5.548738C3.08002193 9.9740657.09772497 6.3791404 0 3.3061316v-.024746C0 2.2060575 2.61386252.3152347 2.64082114.2972376c.7110335-.4971705 1.4917101-.3149497 1.80959713.1372281.19320342.2744561 2.19712724 3.2811005 2.42290565 3.6489167.09884826.1608492.14714912.3554431.14714912.5702838 0 .2744561-.07975258.5770327-.23701117.8751101-.1527655.2902036-.65262318 1.1664385-.89862055 1.594995.2673396.3768148.94804468 1.26429792 2.351016 2.66357424 1.39173858 1.39027775 2.28923588 2.07641807 2.67002628 2.34187563.4302146-.2452108 1.3086162-.74238132 1.5972981-.89423205.5447887-.28682915 1.0907006-.31944893 1.4568885-.08661115.3459689.2182151 3.3383754 2.21027167 3.6225641 2.41611376.2695862.19234426.4144887.5399137.4144887.91672846 0 .2969525-.089862.61190215-.2808189.88523346" />
+            </symbol>
+            <symbol id="guild-member-join-icon" viewBox="0 0 18 18">
+                <path fill="#3ba55c" d="m0 8h14.2l-3.6-3.6 1.4-1.4 6 6-6 6-1.4-1.4 3.6-3.6h-14.2" />
+            </symbol>
+        </defs>
     </svg>
 </head>
 <body>

DiscordChatExporter.Core/Exporting/Writers/HtmlMessageWriter.cs

@@ -25,17 +25,46 @@ internal class HtmlMessageWriter : MessageWriter
         _themeName = themeName;
     }
 
-    private bool CanJoinGroup(Message message) =>
+    private bool CanJoinGroup(Message message)
-        // First message in the group can always join
+    {
-        _messageGroup.LastOrDefault() is not { } lastMessage ||
+        // If the group is empty, any message can join it
-        // Must be from the same author
+        if (_messageGroup.LastOrDefault() is not { } lastMessage)
-        lastMessage.Author.Id == message.Author.Id &&
+            return true;
-        // Author's name must not have changed between messages
+
-        string.Equals(lastMessage.Author.FullName, message.Author.FullName, StringComparison.Ordinal) &&
+        // Reply messages cannot join existing groups because they need to appear first
-        // Duration between messages must be 7 minutes or less
+        if (message.Kind == MessageKind.Reply)
-        (message.Timestamp - lastMessage.Timestamp).Duration().TotalMinutes <= 7 &&
+            return false;
-        // Other message must not be a reply
+
-        message.Reference is null;
+        // Grouping for system notifications
+        if (message.Kind.IsSystemNotification())
+        {
+            // Can only be grouped with other system notifications
+            if (!lastMessage.Kind.IsSystemNotification())
+                return false;
+        }
+        // Grouping for normal messages
+        else
+        {
+            // Can only be grouped with other normal messages
+            if (lastMessage.Kind.IsSystemNotification())
+                return false;
+
+            // Messages must be within 7 minutes of each other
+            if ((message.Timestamp - lastMessage.Timestamp).Duration().TotalMinutes > 7)
+                return false;
+
+            // Messages must be from the same author
+            if (message.Author.Id != lastMessage.Author.Id)
+                return false;
+
+            // If the user changed their name after the last message, their new messages
+            // cannot join an existing group.
+            if (!string.Equals(message.Author.FullName, lastMessage.Author.FullName, StringComparison.Ordinal))
+                return false;
+        }
+
+        return true;
+    }
 
     // Use <!--wmm:ignore--> to preserve blocks of code inside the templates
     private string Minify(string html) => _minifier
@@ -77,7 +106,7 @@ internal class HtmlMessageWriter : MessageWriter
         await base.WriteMessageAsync(message, cancellationToken);
 
         // If the message can be grouped, buffer it for now
-        if (CanJoinGroup( message))
+        if (CanJoinGroup(message))
         {
             _messageGroup.Add(message);
         }

DiscordChatExporter.Core/Utils/Extensions/StringExtensions.cs

@@ -1,5 +1,6 @@
 using System.Collections.Generic;
 using System.Text;
+using System.Text.RegularExpressions;
 
 namespace DiscordChatExporter.Core.Utils.Extensions;
 
@@ -25,6 +26,9 @@ public static class StringExtensions
         }
     }
 
+    public static string ToDashCase(this string str) =>
+        Regex.Replace(str, @"(\p{Ll})(\p{Lu})", "$1-$2");
+
     public static StringBuilder AppendIfNotEmpty(this StringBuilder builder, char value) =>
         builder.Length > 0
             ? builder.Append(value)

Readme.md

@@ -65,6 +65,7 @@ The following table lists all available download options:
           <li>🟠 <a href="https://github.com/Tyrrrz/DiscordChatExporter/actions/workflows/main.yml">CI build</a> (<code>DiscordChatExporter.CLI.zip</code>)</li>
           <li>🐋 <a href="https://hub.docker.com/r/tyrrrz/discordchatexporter">Docker</a> (<code>tyrrrz/discordchatexporter</code>)</li>
           <li>📦 <a href="https://aur.archlinux.org/packages/discord-chat-exporter-cli">AUR</a> (<code>discord-chat-exporter-cli</code>)</li>
+          <li>📦 <a href="https://search.nixos.org/packages?query=discordchatexporter-cli">Nix</a> (<code>discordchatexporter-cli</code>)</li>
         </ul>
       </td>
       <td>
@@ -79,15 +80,19 @@ The following table lists all available download options:
 </table>
 
 > **Note**:
-> **DiscordChatExporter**'s AUR package is maintained by the community.
+> AUR and Nix packages linked above are maintained by the community.
+> If you have any issues with them, please contact the corresponding maintainers.
 
 > **Warning**:
-> To run **DiscordChatExporter** on macOS or Linux, you will need to additionally install **.NET Runtime v6**:
+> To run **DiscordChatExporter** on macOS and Linux, you need to make sure that **.NET Runtime v6** is installed.
+> You can download it here:
+>
 > - [.NET Runtime v6 for **macOS x64**](https://dotnet.microsoft.com/en-us/download/dotnet/thank-you/runtime-6.0.6-macos-x64-installer)
 > - [.NET Runtime v6 for **macOS Arm64**](https://dotnet.microsoft.com/en-us/download/dotnet/thank-you/runtime-6.0.6-macos-arm64-installer)
 > - [.NET Runtime v6 for **Linux**](https://docs.microsoft.com/en-us/dotnet/core/install/linux) (find the correct download for your distro)
 >
-> This is not required if you installed **DiscordChatExporter** using a package manager, or if you plan to run **DiscordChatExporter** via Docker.
+> This should not be necessary if you install **DiscordChatExporter** using a package manager, as it should take care of the dependencies for you.
+> This is also not necessary if you are running **DiscordChatExporter** via Docker, because the image already contains the runtime.
 
 ## Features