Update version

Closes #936

.github/workflows/main.yml

@@ -18,8 +18,7 @@ jobs:
       - name: Install .NET
         uses: actions/setup-dotnet@v2
         with:
-          # Fixed version, workaround for https://github.com/dotnet/core/issues/7176
-          dotnet-version: 6.0.100
+          dotnet-version: 6.0.x
 
       - name: Run tests
         # Tests need access to secrets, so we can't run them against PRs because of limited trust
@@ -50,8 +49,7 @@ jobs:
       - name: Install .NET
         uses: actions/setup-dotnet@v2
         with:
-          # Fixed version, workaround for https://github.com/dotnet/core/issues/7176
-          dotnet-version: 6.0.100
+          dotnet-version: 6.0.x
 
       - name: Publish (CLI)
         run: dotnet publish DiscordChatExporter.Cli/ -o DiscordChatExporter.Cli/bin/Publish/ --configuration Release
@@ -151,4 +149,4 @@ jobs:
           payload: |
             {
               "content": "**DiscordChatExporter** new version released!\nVersion: `${{ steps.get_version.outputs.tag }}`\nChangelog: <https://github.com/Tyrrrz/DiscordChatExporter/blob/${{ steps.get_version.outputs.tag }}/Changelog.md>"
-            }
+            }

Changelog.md

@@ -1,3 +1,10 @@
+### v2.36.1 (24-Sep-2022)
+
+- Added a check which will trigger an error if the provided bot account does not have the message content intent enabled. Note, however, that this check is based on heuristics which may result in false negatives.
+- Fixed an issue where certain transient HTTP errors were not retried.
+- Fixed an issue which caused the export process to fail with the `IndexOutOfRangeException` exception on certain automated messages.
+- Fixed an issue which caused the export process to fail on unrecognized embed types.
+
 ### 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))

Directory.Build.props

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>net6.0</TargetFramework>
-    <Version>2.36</Version>
+    <Version>2.36.1</Version>
     <Company>Tyrrrz</Company>
     <Copyright>Copyright (c) Oleksii Holub</Copyright>
     <LangVersion>preview</LangVersion>

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

@@ -37,7 +37,7 @@ public partial record Embed
         var title = json.GetPropertyOrNull("title")?.GetStringOrNull();
 
         var kind =
-            json.GetPropertyOrNull("type")?.GetStringOrNull()?.Pipe(s => Enum.Parse<EmbedKind>(s, true)) ??
+            json.GetPropertyOrNull("type")?.GetStringOrNull()?.ParseEnumOrNull<EmbedKind>() ??
             EmbedKind.Rich;
 
         var url = json.GetPropertyOrNull("url")?.GetNonWhiteSpaceStringOrNull();

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

@@ -7,6 +7,5 @@ public enum EmbedKind
     Image,
     Video,
     Gifv,
-    Article,
     Link
 }

DiscordChatExporter.Core/Discord/Data/Message.cs

@@ -10,7 +10,7 @@ using JsonExtensions.Reading;
 namespace DiscordChatExporter.Core.Discord.Data;
 
 // https://discord.com/developers/docs/resources/channel#message-object
-public record Message(
+public partial record Message(
     Snowflake Id,
     MessageKind Kind,
     User Author,
@@ -26,6 +26,16 @@ public record Message(
     IReadOnlyList<User> MentionedUsers,
     MessageReference? Reference,
     Message? ReferencedMessage) : IHasId
+{
+    public bool IsEmpty =>
+        Kind == MessageKind.Default &&
+        string.IsNullOrEmpty(Content) &&
+        !Attachments.Any() &&
+        !Embeds.Any() &&
+        !Stickers.Any();
+}
+
+public partial record Message
 {
     private static IReadOnlyList<Embed> NormalizeEmbeds(IReadOnlyList<Embed> embeds)
     {

DiscordChatExporter.Core/Discord/Data/MessageKind.cs

@@ -17,6 +17,5 @@ public enum MessageKind
 
 public static class MessageKindExtensions
 {
-    public static bool IsSystemNotification(this MessageKind c) =>
-        c is not MessageKind.Default and not MessageKind.Reply;
+    public static bool IsSystemNotification(this MessageKind c) => (int)c is >= 1 and <= 18;
 }

DiscordChatExporter.Core/Discord/DiscordClient.cs

@@ -22,65 +22,67 @@ public class DiscordClient
     private readonly string _token;
     private readonly Uri _baseUri = new("https://discord.com/api/v9/", UriKind.Absolute);
 
-    private TokenKind _tokenKind = TokenKind.Unknown;
+    private TokenKind? _resolvedTokenKind;
 
     public DiscordClient(string token) => _token = token;
 
     private async ValueTask<HttpResponseMessage> GetResponseAsync(
         string url,
-        bool isBot,
+        TokenKind tokenKind,
         CancellationToken cancellationToken = default)
     {
-        using var request = new HttpRequestMessage(HttpMethod.Get, new Uri(_baseUri, url));
+        return await Http.ResponseResiliencePolicy.ExecuteAsync(async innerCancellationToken =>
+        {
+            using var request = new HttpRequestMessage(HttpMethod.Get, new Uri(_baseUri, url));
 
-        // Don't validate because token can have invalid characters
-        // https://github.com/Tyrrrz/DiscordChatExporter/issues/828
-        request.Headers.TryAddWithoutValidation(
-            "Authorization",
-            isBot ? $"Bot {_token}" : _token
-        );
+            // Don't validate because token can have invalid characters
+            // https://github.com/Tyrrrz/DiscordChatExporter/issues/828
+            request.Headers.TryAddWithoutValidation(
+                "Authorization",
+                tokenKind == TokenKind.Bot
+                    ? $"Bot {_token}"
+                    : _token
+            );
 
-        return await Http.Client.SendAsync(
-            request,
-            HttpCompletionOption.ResponseHeadersRead,
+            return await Http.Client.SendAsync(
+                request,
+                HttpCompletionOption.ResponseHeadersRead,
+                innerCancellationToken
+            );
+        }, cancellationToken);
+    }
+
+    private async ValueTask<TokenKind> GetTokenKindAsync(CancellationToken cancellationToken = default)
+    {
+        // Try authenticating as a user
+        using var userResponse = await GetResponseAsync(
+            "users/@me",
+            TokenKind.User,
             cancellationToken
         );
+
+        if (userResponse.StatusCode != HttpStatusCode.Unauthorized)
+            return TokenKind.User;
+
+        // Try authenticating as a bot
+        using var botResponse = await GetResponseAsync(
+            "users/@me",
+            TokenKind.Bot,
+            cancellationToken
+        );
+
+        if (botResponse.StatusCode != HttpStatusCode.Unauthorized)
+            return TokenKind.Bot;
+
+        throw DiscordChatExporterException.Unauthorized();
     }
 
     private async ValueTask<HttpResponseMessage> GetResponseAsync(
         string url,
         CancellationToken cancellationToken = default)
     {
-        return await Http.ResponseResiliencePolicy.ExecuteAsync(async innerCancellationToken =>
-        {
-            if (_tokenKind == TokenKind.User)
-                return await GetResponseAsync(url, false, innerCancellationToken);
-
-            if (_tokenKind == TokenKind.Bot)
-                return await GetResponseAsync(url, true, innerCancellationToken);
-
-            // Try to authenticate as user
-            var userResponse = await GetResponseAsync(url, false, innerCancellationToken);
-            if (userResponse.StatusCode != HttpStatusCode.Unauthorized)
-            {
-                _tokenKind = TokenKind.User;
-                return userResponse;
-            }
-
-            userResponse.Dispose();
-
-            // Otherwise, try to authenticate as bot
-            var botResponse = await GetResponseAsync(url, true, innerCancellationToken);
-            if (botResponse.StatusCode != HttpStatusCode.Unauthorized)
-            {
-                _tokenKind = TokenKind.Bot;
-                return botResponse;
-            }
-
-            // The token is probably invalid altogether.
-            // Return the last response anyway, upstream should handle the error.
-            return botResponse;
-        }, cancellationToken);
+        var tokenKind = _resolvedTokenKind ??= await GetTokenKindAsync(cancellationToken);
+        return await GetResponseAsync(url, tokenKind, cancellationToken);
     }
 
     private async ValueTask<JsonElement> GetJsonResponseAsync(
@@ -321,6 +323,11 @@ public class DiscordClient
                 if (message.Timestamp > lastMessage.Timestamp)
                     yield break;
 
+                // Make sure the messages are not empty when exporting via a bot
+                // https://github.com/Tyrrrz/DiscordChatExporter/issues/918
+                if (_resolvedTokenKind == TokenKind.Bot && message.IsEmpty && !message.Author.IsBot)
+                    throw DiscordChatExporterException.MessageContentIntentMissing();
+
                 // Report progress based on the duration of exported messages divided by total
                 if (progress is not null)
                 {

DiscordChatExporter.Core/Discord/TokenKind.cs

@@ -2,7 +2,6 @@
 
 public enum TokenKind
 {
-    Unknown,
     User,
     Bot
 }

DiscordChatExporter.Core/Exceptions/DiscordChatExporterException.cs

@@ -41,4 +41,7 @@ Failed to perform an HTTP request.
 
     internal static DiscordChatExporterException ChannelIsEmpty() =>
         new("No messages found for the specified period.");
+
+    internal static DiscordChatExporterException MessageContentIntentMissing() =>
+        new("Failed to retrieve message content because the bot doesn't have the Message Content Intent enabled.");
 }

DiscordChatExporter.Core/Exporting/ExportContext.cs

@@ -42,7 +42,7 @@ internal class ExportContext
     {
         "unix" => date.ToUnixTimeSeconds().ToString(),
         "unixms" => date.ToUnixTimeMilliseconds().ToString(),
-        var dateFormat => date.ToLocalString(dateFormat)
+        var format => date.ToLocalString(format)
     };
 
     public Member? TryGetMember(Snowflake id) => Members.FirstOrDefault(m => m.Id == id);

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

@@ -10,8 +10,6 @@
 @inherits MiniRazor.TemplateBase<MessageGroupTemplateContext>
 
 @{
-    var firstMessage = Model.Messages.First();
-
     ValueTask<string> ResolveUrlAsync(string url) => Model.ExportContext.ResolveMediaUrlAsync(url);
 
     string FormatDate(DateTimeOffset date) => Model.ExportContext.FormatDate(date);
@@ -20,6 +18,8 @@
 
     string FormatEmbedMarkdown(string markdown) => Model.FormatMarkdown(markdown, false);
 
+    var firstMessage = Model.Messages.First();
+
     var userMember = Model.ExportContext.TryGetMember(firstMessage.Author.Id);
 
     var userColor = Model.ExportContext.TryGetUserColor(firstMessage.Author.Id);
@@ -62,29 +62,31 @@
                     : 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>
+                    <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>
+                    @{/* Author name */}
+                    <span class="chatlog__system-notification-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)
+                    @{/* System notification content */}
+                    <span class="chatlog__system-notification-content">
+                        @if (message.Kind == MessageKind.ChannelPinnedMessage && message.Reference is not null)
                         {
-                            <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>
+                            <span> pinned</span>
+                            <a class="chatlog__system-notification-link" href="#chatlog__message-container-@message.Reference.MessageId"> a message</a>
+                            <span> to this channel.</span>
                         }
                         else
                         {
-                            <span class="chatlog__system-notification">@(char.ToLowerInvariant(message.Content[0]) + message.Content[1..])</span>
+                            <span>@message.Content.ToLowerInvariant()</span>
                         }
+                    </span>
 
-                        @{/* Timestamp */}
-                        <span class="chatlog__timestamp"><a href="#chatlog__message-container-@message.Id">@FormatDate(message.Timestamp)</a></span>
-                    </div>
+                    @{/* Timestamp */}
+                    <span class="chatlog__system-notification-timestamp">
+                        <a href="#chatlog__message-container-@message.Id">@FormatDate(message.Timestamp)</a>
+                    </span>
                 </div>
             }
             // Regular message
@@ -168,11 +170,11 @@
                     }
 
                     @{/* Content */}
-                    @if (!string.IsNullOrWhiteSpace(message.Content) || message.EditedTimestamp is not null)
+                    @if ((!string.IsNullOrWhiteSpace(message.Content) && !message.IsContentHidden()) || message.EditedTimestamp is not null)
                     {
                         <div class="chatlog__content chatlog__markdown">
                             @{/* Text */}
-                            @if (!message.IsContentHidden())
+                            @if (!string.IsNullOrWhiteSpace(message.Content) && !message.IsContentHidden())
                             {
                                 <span class="chatlog__markdown-preserve"><!--wmm:ignore-->@Raw(FormatMarkdown(message.Content))<!--/wmm:ignore--></span>
                             }

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

@@ -69,6 +69,7 @@
             font-family: Whitney, "Helvetica Neue", Helvetica, Arial, sans-serif;
             font-size: 17px;
             font-weight: @Themed("400", "500");
+            scroll-behavior: smooth;
         }
 
         a {
@@ -254,18 +255,36 @@
             unicode-bidi: bidi-override;
         }
 
-        .chatlog__system-notification {
+        .chatlog__system-notification-icon {
+            width: 18px;
+            height: 18px;
+        }
+
+        .chatlog__system-notification-author {
+            font-weight: @Themed("500", "600");
+            color: @Themed("#ffffff", "#2f3136");
+        }
+
+        .chatlog__system-notification-content {
             color: @Themed("#96989d", "#5e6772")
         }
 
-        .chatlog__system-notification-reference-link {
+        .chatlog__system-notification-link {
             font-weight: 500;
             color: @Themed("#ffffff", "#2f3136");
         }
 
-        .chatlog__system-notification-icon {
-            width: 18px;
-            height: 18px;
+        .chatlog__system-notification-timestamp {
+            margin-left: 0.3rem;
+            color: @Themed("#a3a6aa", "#5e6772");
+            font-size: 0.75rem;
+            font-weight: 500;
+            direction: ltr;
+            unicode-bidi: bidi-override;
+        }
+
+        .chatlog__system-notification-timestamp a {
+            color: inherit;
         }
 
         .chatlog__header {
@@ -300,7 +319,7 @@
         }
 
         .chatlog__timestamp a {
-            color: @Themed("#a3a6aa", "#5e6772");
+            color: inherit;
         }
 
         .chatlog__content {

DiscordChatExporter.Core/Utils/Extensions/StringExtensions.cs

@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.Text;
 using System.Text.RegularExpressions;
 
@@ -29,6 +30,11 @@ public static class StringExtensions
     public static string ToDashCase(this string str) =>
         Regex.Replace(str, @"(\p{Ll})(\p{Lu})", "$1-$2");
 
+    public static T? ParseEnumOrNull<T>(this string str, bool ignoreCase = true) where T : struct, Enum =>
+        Enum.TryParse<T>(str, ignoreCase, out var result)
+            ? result
+            : null;
+
     public static StringBuilder AppendIfNotEmpty(this StringBuilder builder, char value) =>
         builder.Length > 0
             ? builder.Append(value)

DiscordChatExporter.Core/Utils/Http.cs

@@ -3,6 +3,7 @@ using System.Linq;
 using System.Net;
 using System.Net.Http;
 using System.Net.Sockets;
+using System.Security.Authentication;
 using System.Threading.Tasks;
 using DiscordChatExporter.Core.Utils.Extensions;
 using Polly;
@@ -21,7 +22,7 @@ public static class Http
 
     private static bool IsRetryableException(Exception exception) =>
         exception.GetSelfAndChildren().Any(ex =>
-            ex is TimeoutException or SocketException ||
+            ex is TimeoutException or SocketException or AuthenticationException ||
             ex is HttpRequestException hrex && IsRetryableStatusCode(hrex.TryGetStatusCode() ?? HttpStatusCode.OK)
         );