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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!");
}
}
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