Add eons of work because I forgot to push

1 files changed, 298 insertions, 0 deletions

diff --git a/MatrixUtils.DmSpaced/ModerationBot.cs b/MatrixUtils.DmSpaced/ModerationBot.cs
new file mode 100644
index 0000000..6e534fc
--- /dev/null
+++ b/MatrixUtils.DmSpaced/ModerationBot.cs
@@ -0,0 +1,298 @@
+using ArcaneLibs.Extensions;
+using LibMatrix;
+using LibMatrix.EventTypes.Spec;
+using LibMatrix.EventTypes.Spec.State;
+using LibMatrix.EventTypes.Spec.State.Policy;
+using LibMatrix.Helpers;
+using LibMatrix.Homeservers;
+using LibMatrix.RoomTypes;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+
+namespace ModerationBot;
+
+public class ModerationBot(AuthenticatedHomeserverGeneric hs, ILogger<ModerationBot> logger, ModerationBotConfiguration configuration, PolicyEngine engine) : IHostedService {
+    private Task _listenerTask;
+
+    // private GenericRoom _policyRoom;
+    private GenericRoom? _logRoom;
+    private GenericRoom? _controlRoom;
+
+    /// <summary>Triggered when the application host is ready to start the service.</summary>
+    /// <param name="cancellationToken">Indicates that the start process has been aborted.</param>
+    public async Task StartAsync(CancellationToken cancellationToken) {
+        _listenerTask = Run(cancellationToken);
+        logger.LogInformation("Bot started!");
+    }
+
+    private async Task Run(CancellationToken cancellationToken) {
+        if (Directory.Exists("bot_data/cache"))
+            Directory.GetFiles("bot_data/cache").ToList().ForEach(File.Delete);
+
+        BotData botData;
+
+        try {
+            logger.LogInformation("Fetching bot account data...");
+            botData = await hs.GetAccountDataAsync<BotData>("gay.rory.moderation_bot_data");
+            logger.LogInformation("Got bot account data...");
+        }
+        catch (Exception e) {
+            logger.LogInformation("Could not fetch bot account data... {}", e.Message);
+            if (e is not MatrixException { ErrorCode: "M_NOT_FOUND" }) {
+                logger.LogError("{}", e.ToString());
+                throw;
+            }
+
+            botData = null;
+        }
+
+        botData = await FirstRunTasks.ConstructBotData(hs, configuration, botData);
+
+        // _policyRoom = hs.GetRoom(botData.PolicyRoom ?? botData.ControlRoom);
+        _logRoom = hs.GetRoom(botData.LogRoom ?? botData.ControlRoom);
+        _controlRoom = hs.GetRoom(botData.ControlRoom);
+        foreach (var configurationAdmin in configuration.Admins) {
+            var pls = await _controlRoom.GetPowerLevelsAsync();
+            if (pls is null) {
+                await _logRoom?.SendMessageEventAsync(MessageFormatter.FormatWarning($"Control room has no m.room.power_levels?"));
+                continue;
+            }
+            pls.SetUserPowerLevel(configurationAdmin, pls.GetUserPowerLevel(hs.UserId));
+            await _controlRoom.SendStateEventAsync(RoomPowerLevelEventContent.EventId, pls);
+        }
+        var syncHelper = new SyncHelper(hs);
+
+        List<string> admins = new();
+
+#pragma warning disable CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
+        Task.Run(async () => {
+            while (!cancellationToken.IsCancellationRequested) {
+                var controlRoomMembers = _controlRoom.GetMembersEnumerableAsync();
+                var pls = await _controlRoom.GetPowerLevelsAsync();
+                await foreach (var member in controlRoomMembers) {
+                    if ((member.TypedContent as RoomMemberEventContent)?
+                        .Membership == "join" && pls.UserHasTimelinePermission(member.Sender, RoomMessageEventContent.EventId)) admins.Add(member.StateKey);
+                }
+
+                await Task.Delay(TimeSpan.FromMinutes(5), cancellationToken);
+            }
+        }, cancellationToken);
+#pragma warning restore CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
+
+        syncHelper.InviteReceivedHandlers.Add(async Task (args) => {
+            var inviteEvent =
+                args.Value.InviteState.Events.FirstOrDefault(x =>
+                    x.Type == "m.room.member" && x.StateKey == hs.UserId);
+            logger.LogInformation("Got invite to {RoomId} by {Sender} with reason: {Reason}", args.Key, inviteEvent!.Sender,
+                (inviteEvent.TypedContent as RoomMemberEventContent)!.Reason);
+            await _logRoom.SendMessageEventAsync(MessageFormatter.FormatSuccess($"Bot invited to {MessageFormatter.HtmlFormatMention(args.Key)} by {MessageFormatter.HtmlFormatMention(inviteEvent.Sender)}"));
+            if (admins.Contains(inviteEvent.Sender)) {
+                try {
+                    await _logRoom.SendMessageEventAsync(MessageFormatter.FormatSuccess($"Joining {MessageFormatter.HtmlFormatMention(args.Key)}..."));
+                    var senderProfile = await hs.GetProfileAsync(inviteEvent.Sender);
+                    await hs.GetRoom(args.Key).JoinAsync(reason: $"I was invited by {senderProfile.DisplayName ?? inviteEvent.Sender}!");
+                }
+                catch (Exception e) {
+                    logger.LogError("{}", e.ToString());
+                    await _logRoom.SendMessageEventAsync(MessageFormatter.FormatException("Could not join room", e));
+                    await hs.GetRoom(args.Key).LeaveAsync(reason: "I was unable to join the room: " + e);
+                }
+            }
+        });
+
+        syncHelper.TimelineEventHandlers.Add(async @event => {
+            var room = hs.GetRoom(@event.RoomId);
+            try {
+                logger.LogInformation(
+                    "Got timeline event in {}: {}", @event.RoomId, @event.ToJson(indent: true, ignoreNull: true));
+
+                if (@event != null && (
+                        @event.MappedType.IsAssignableTo(typeof(BasePolicy))
+                        || @event.MappedType.IsAssignableTo(typeof(PolicyRuleEventContent))
+                    )) {
+                    await LogPolicyChange(@event);
+                    await engine.ReloadActivePolicyListById(@event.RoomId);
+                }
+
+                var rules = await engine.GetMatchingPolicies(@event);
+                foreach (var matchedRule in rules) {
+                    await _logRoom.SendMessageEventAsync(MessageFormatter.FormatSuccessJson(
+                        $"{MessageFormatter.HtmlFormatMessageLink(eventId: @event.EventId, roomId: room.RoomId, displayName: "Event")} matched {MessageFormatter.HtmlFormatMessageLink(eventId: @matchedRule.OriginalEvent.EventId, roomId: matchedRule.PolicyList.Room.RoomId, displayName: "rule")}", @matchedRule.OriginalEvent.RawContent));
+                }
+
+                if (configuration.DemoMode) {
+                    // foreach (var matchedRule in rules) {
+                    // await room.SendMessageEventAsync(MessageFormatter.FormatSuccessJson(
+                    // $"{MessageFormatter.HtmlFormatMessageLink(eventId: @event.EventId, roomId: room.RoomId, displayName: "Event")} matched {MessageFormatter.HtmlFormatMessageLink(eventId: @matchedRule.EventId, roomId: matchedRule.RoomId, displayName: "rule")}", @matchedRule.RawContent));
+                    // }
+                    return;
+                }
+                //
+                //                 if (@event is { Type: "m.room.message", TypedContent: RoomMessageEventContent message }) {
+                //                     if (message is { MessageType: "m.image" }) {
+                //                         //check media
+                //                         // var matchedPolicy = await CheckMedia(@event);
+                //                         var matchedPolicy = rules.FirstOrDefault();
+                //                         if (matchedPolicy is null) return;
+                //                         var matchedpolicyData = matchedPolicy.TypedContent as MediaPolicyEventContent;
+                //                         await _logRoom.SendMessageEventAsync(
+                //                             new RoomMessageEventContent(
+                //                                 body:
+                //                                 $"User {MessageFormatter.HtmlFormatMention(@event.Sender)} posted an image in {MessageFormatter.HtmlFormatMention(room.RoomId)} that matched rule {matchedPolicy.StateKey}, applying action {matchedpolicyData.Recommendation}, as described in rule: {matchedPolicy.RawContent!.ToJson(ignoreNull: true)}",
+                //                                 messageType: "m.text") {
+                //                                 Format = "org.matrix.custom.html",
+                //                                 FormattedBody =
+                //                                     $"<font color=\"#FFFF00\">User {MessageFormatter.HtmlFormatMention(@event.Sender)} posted an image in {MessageFormatter.HtmlFormatMention(room.RoomId)} that matched rule {matchedPolicy.StateKey}, applying action {matchedpolicyData.Recommendation}, as described in rule: <pre>{matchedPolicy.RawContent!.ToJson(ignoreNull: true)}</pre></font>"
+                //                             });
+                //                         switch (matchedpolicyData.Recommendation) {
+                //                             case "warn_admins": {
+                //                                 await _controlRoom.SendMessageEventAsync(
+                //                                     new RoomMessageEventContent(
+                //                                         body: $"{string.Join(' ', admins)}\nUser {MessageFormatter.HtmlFormatMention(@event.Sender)} posted a banned image {message.Url}",
+                //                                         messageType: "m.text") {
+                //                                         Format = "org.matrix.custom.html",
+                //                                         FormattedBody = $"{string.Join(' ', admins.Select(u => MessageFormatter.HtmlFormatMention(u)))}\n" +
+                //                                                         $"<font color=\"#FF0000\">User {MessageFormatter.HtmlFormatMention(@event.Sender)} posted a banned image <a href=\"{message.Url}\">{message.Url}</a></font>"
+                //                                     });
+                //                                 break;
+                //                             }
+                //                             case "warn": {
+                //                                 await room.SendMessageEventAsync(
+                //                                     new RoomMessageEventContent(
+                //                                         body: $"Please be careful when posting this image: {matchedpolicyData.Reason ?? "No reason specified"}",
+                //                                         messageType: "m.text") {
+                //                                         Format = "org.matrix.custom.html",
+                //                                         FormattedBody =
+                //                                             $"<font color=\"#FFFF00\">Please be careful when posting this image: {matchedpolicyData.Reason ?? "No reason specified"}</a></font>"
+                //                                     });
+                //                                 break;
+                //                             }
+                //                             case "redact": {
+                //                                 await room.RedactEventAsync(@event.EventId, matchedpolicyData.Reason ?? "No reason specified");
+                //                                 break;
+                //                             }
+                //                             case "spoiler": {
+                //                                 // <blockquote>
+                //                                 //  <a href=\"https://matrix.to/#/@emma:rory.gay\">@emma:rory.gay</a><br>
+                //                                 //  <a href=\"https://codeberg.org/crimsonfork/CN\"></a>
+                //                                 //  <font color=\"#dc143c\" data-mx-color=\"#dc143c\">
+                //                                 //      <b>CN</b>
+                //                                 //  </font>:
+                //                                 //  <a href=\"https://the-apothecary.club/_matrix/media/v3/download/rory.gay/sLkdxUhipiQaFwRkXcPSRwdg\">test</a><br>
+                //                                 //  <span data-mx-spoiler=\"\"><a href=\"https://the-apothecary.club/_matrix/media/v3/download/rory.gay/sLkdxUhipiQaFwRkXcPSRwdg\">
+                //                                 //      <img src=\"mxc://rory.gay/sLkdxUhipiQaFwRkXcPSRwdg\" height=\"69\"></a>
+                //                                 //  </span>
+                //                                 // </blockquote>
+                //                                 await room.SendMessageEventAsync(
+                //                                     new RoomMessageEventContent(
+                //                                         body:
+                //                                         $"Please be careful when posting this image: {matchedpolicyData.Reason}, I have spoilered it for you:",
+                //                                         messageType: "m.text") {
+                //                                         Format = "org.matrix.custom.html",
+                //                                         FormattedBody =
+                //                                             $"<font color=\"#FFFF00\">Please be careful when posting this image: {matchedpolicyData.Reason}, I have spoilered it for you:</a></font>"
+                //                                     });
+                //                                 var imageUrl = message.Url;
+                //                                 await room.SendMessageEventAsync(
+                //                                     new RoomMessageEventContent(body: $"CN: {imageUrl}",
+                //                                         messageType: "m.text") {
+                //                                         Format = "org.matrix.custom.html",
+                //                                         FormattedBody = $"""
+                //                                                              <blockquote>
+                //                                                                 <font color=\"#dc143c\" data-mx-color=\"#dc143c\">
+                //                                                                     <b>CN</b>
+                //                                                                 </font>:
+                //                                                                 <a href=\"{imageUrl}\">{matchedpolicyData.Reason}</a><br>
+                //                                                                 <span data-mx-spoiler=\"\">
+                //                                                                     <a href=\"{imageUrl}\">
+                //                                                                         <img src=\"{imageUrl}\" height=\"69\">
+                //                                                                     </a>
+                //                                                                 </span>
+                //                                                              </blockquote>
+                //                                                          """
+                //                                     });
+                //                                 await room.RedactEventAsync(@event.EventId, "Automatically spoilered: " + matchedpolicyData.Reason);
+                //                                 break;
+                //                             }
+                //                             case "mute": {
+                //                                 await room.RedactEventAsync(@event.EventId, matchedpolicyData.Reason);
+                //                                 //change powerlevel to -1
+                //                                 var currentPls = await room.GetPowerLevelsAsync();
+                //                                 if (currentPls is null) {
+                //                                     logger.LogWarning("Unable to get power levels for {room}", room.RoomId);
+                //                                     await _logRoom.SendMessageEventAsync(
+                //                                         MessageFormatter.FormatError($"Unable to get power levels for {MessageFormatter.HtmlFormatMention(room.RoomId)}"));
+                //                                     return;
+                //                                 }
+                //
+                //                                 currentPls.Users ??= new();
+                //                                 currentPls.Users[@event.Sender] = -1;
+                //                                 await room.SendStateEventAsync("m.room.power_levels", currentPls);
+                //                                 break;
+                //                             }
+                //                             case "kick": {
+                //                                 await room.RedactEventAsync(@event.EventId, matchedpolicyData.Reason);
+                //                                 await room.KickAsync(@event.Sender, matchedpolicyData.Reason);
+                //                                 break;
+                //                             }
+                //                             case "ban": {
+                //                                 await room.RedactEventAsync(@event.EventId, matchedpolicyData.Reason);
+                //                                 await room.BanAsync(@event.Sender, matchedpolicyData.Reason);
+                //                                 break;
+                //                             }
+                //                             default: {
+                //                                 throw new ArgumentOutOfRangeException("recommendation",
+                //                                     $"Unknown response type {matchedpolicyData.Recommendation}!");
+                //                             }
+                //                         }
+                //                     }
+                //                 }
+            }
+            catch (Exception e) {
+                logger.LogError("{}", e.ToString());
+                await _controlRoom.SendMessageEventAsync(
+                    MessageFormatter.FormatException($"Unable to process event in {MessageFormatter.HtmlFormatMention(room.RoomId)}", e));
+                await _logRoom.SendMessageEventAsync(
+                    MessageFormatter.FormatException($"Unable to process event in {MessageFormatter.HtmlFormatMention(room.RoomId)}", e));
+                await using var stream = new MemoryStream(e.ToString().AsBytes().ToArray());
+                await _controlRoom.SendFileAsync("error.log.cs", stream);
+                await _logRoom.SendFileAsync("error.log.cs", stream);
+            }
+        });
+        await engine.ReloadActivePolicyLists();
+        await syncHelper.RunSyncLoopAsync();
+    }
+
+    private async Task LogPolicyChange(StateEventResponse changeEvent) {
+        var room = hs.GetRoom(changeEvent.RoomId!);
+        var message = MessageFormatter.FormatWarning($"Policy change detected in {MessageFormatter.HtmlFormatMessageLink(changeEvent.RoomId, changeEvent.EventId, [hs.ServerName], await room.GetNameOrFallbackAsync())}!");
+        message = message.ConcatLine(new RoomMessageEventContent(body: $"Policy type: {changeEvent.Type} -> {changeEvent.MappedType.Name}") {
+            FormattedBody = $"Policy type: {changeEvent.Type} -> {changeEvent.MappedType.Name}"
+        });
+        var isUpdated = changeEvent.Unsigned.PrevContent is { Count: > 0 };
+        var isRemoved = changeEvent.RawContent is not { Count: > 0 };
+        // if (isUpdated) {
+        //     message = message.ConcatLine(MessageFormatter.FormatSuccess("Rule updated!"));
+        //     message = message.ConcatLine(MessageFormatter.FormatSuccessJson("Old rule:", changeEvent.Unsigned.PrevContent!));
+        // }
+        // else if (isRemoved) {
+        //     message = message.ConcatLine(MessageFormatter.FormatWarningJson("Rule removed!", changeEvent.Unsigned.PrevContent!));
+        // }
+        // else {
+        //     message = message.ConcatLine(MessageFormatter.FormatSuccess("New rule added!"));
+        // }
+        message = message.ConcatLine(MessageFormatter.FormatSuccessJson($"{(isUpdated ? "Updated" : isRemoved ? "Removed" : "New")} rule: {changeEvent.StateKey}", changeEvent.RawContent!));
+        if (isRemoved || isUpdated) {
+            message = message.ConcatLine(MessageFormatter.FormatSuccessJson("Old content: ", changeEvent.Unsigned.PrevContent!));
+        }
+        
+        await _logRoom.SendMessageEventAsync(message);
+    }
+
+    /// <summary>Triggered when the application host is performing a graceful shutdown.</summary>
+    /// <param name="cancellationToken">Indicates that the shutdown process should no longer be graceful.</param>
+    public async Task StopAsync(CancellationToken cancellationToken) {
+        logger.LogInformation("Shutting down bot!");
+    }
+
+}