Moderation bot work

1 files changed, 275 insertions, 0 deletions

diff --git a/ModerationBot.cs b/ModerationBot.cs
new file mode 100644
index 0000000..79b05bf
--- /dev/null
+++ b/ModerationBot.cs
@@ -0,0 +1,275 @@
+using System.Security.Cryptography;
+using System.Text.RegularExpressions;
+using ArcaneLibs.Extensions;
+using LibMatrix;
+using LibMatrix.EventTypes.Spec;
+using LibMatrix.EventTypes.Spec.State;
+using LibMatrix.Helpers;
+using LibMatrix.Homeservers;
+using LibMatrix.Responses;
+using LibMatrix.RoomTypes;
+using LibMatrix.Services;
+using LibMatrix.Utilities.Bot.Interfaces;
+using ModerationBot.AccountData;
+using ModerationBot.StateEventTypes;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+using ModerationBot.StateEventTypes.Policies;
+
+namespace ModerationBot;
+
+public class ModerationBot(AuthenticatedHomeserverGeneric hs, ILogger<ModerationBot> logger, ModerationBotConfiguration configuration,
+    HomeserverResolverService hsResolver, PolicyEngine engine) : IHostedService {
+    private readonly IEnumerable<ICommand> _commands;
+
+    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();
+            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.GetMembersAsync();
+                await foreach (var member in controlRoomMembers) {
+                    if ((member.TypedContent as RoomMemberEventContent)?
+                        .Membership == "join") 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.GetType.IsAssignableTo(typeof(BasePolicy))
+                        || @event.GetType.IsAssignableTo(typeof(PolicyRuleEventContent))
+                    ))
+                    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();
+    }
+
+    /// <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!");
+    }
+
+}
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