diff --git a/ExampleBots/MediaModeratorPoC/MediaModBot.cs b/ExampleBots/MediaModeratorPoC/MediaModBot.cs
deleted file mode 100644
index 0aacf61..0000000
--- a/ExampleBots/MediaModeratorPoC/MediaModBot.cs
+++ /dev/null
@@ -1,339 +0,0 @@
-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 MediaModeratorPoC.AccountData;
-using MediaModeratorPoC.StateEventTypes;
-using Microsoft.Extensions.Hosting;
-using Microsoft.Extensions.Logging;
-
-namespace MediaModeratorPoC;
-
-public class MediaModBot(AuthenticatedHomeserverGeneric hs, ILogger<MediaModBot> logger, MediaModBotConfiguration configuration,
- HomeserverResolverService hsResolver) : 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) {
- Directory.GetFiles("bot_data/cache").ToList().ForEach(File.Delete);
-
- BotData botData;
-
- try {
- botData = await hs.GetAccountDataAsync<BotData>("gay.rory.modbot_data");
- }
- catch (Exception e) {
- if (e is not MatrixException { ErrorCode: "M_NOT_FOUND" }) {
- logger.LogError("{}", e.ToString());
- throw;
- }
-
- botData = new BotData();
- var creationContent = CreateRoomRequest.CreatePrivate(hs, name: "Media Moderator PoC - Control room", roomAliasName: "media-moderator-poc-control-room");
- creationContent.Invite = configuration.Admins;
- creationContent.CreationContent["type"] = "gay.rory.media_moderator_poc.control_room";
-
- botData.ControlRoom = (await hs.CreateRoom(creationContent)).RoomId;
-
- //set access rules to allow joining via control room
- creationContent.InitialState.Add(new StateEvent {
- Type = "m.room.join_rules",
- StateKey = "",
- TypedContent = new RoomJoinRulesEventContent {
- JoinRule = "knock_restricted",
- Allow = new() {
- new RoomJoinRulesEventContent.AllowEntry {
- Type = "m.room_membership",
- RoomId = botData.ControlRoom
- }
- }
- }
- });
-
- creationContent.Name = "Media Moderator PoC - Log room";
- creationContent.RoomAliasName = "media-moderator-poc-log-room";
- creationContent.CreationContent["type"] = "gay.rory.media_moderator_poc.log_room";
- botData.LogRoom = (await hs.CreateRoom(creationContent)).RoomId;
-
- creationContent.Name = "Media Moderator PoC - Policy room";
- creationContent.RoomAliasName = "media-moderator-poc-policy-room";
- creationContent.CreationContent["type"] = "gay.rory.media_moderator_poc.policy_room";
- botData.PolicyRoom = (await hs.CreateRoom(creationContent)).RoomId;
-
- await hs.SetAccountData("gay.rory.modbot_data", botData);
- }
-
- _policyRoom = hs.GetRoom(botData.PolicyRoom ?? botData.ControlRoom);
- _logRoom = hs.GetRoom(botData.LogRoom ?? botData.ControlRoom);
- _controlRoom = hs.GetRoom(botData.ControlRoom);
- 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.UserId);
- }
-
- await Task.Delay(TimeSpan.FromSeconds(30), 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);
- if (inviteEvent.Sender.EndsWith(":rory.gay") || inviteEvent!.Sender.EndsWith(":conduit.rory.gay")) {
- try {
- 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 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 is { Type: "m.room.message", TypedContent: RoomMessageEventContent message }) {
- if (message is { MessageType: "m.image" }) {
- //check media
- var matchedPolicy = await CheckMedia(@event);
- if (matchedPolicy is null) return;
- var matchedpolicyData = matchedPolicy.TypedContent as MediaPolicyEventContent;
- var recommendation = matchedpolicyData.Recommendation;
- 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 (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 ban user in {MessageFormatter.HtmlFormatMention(room.RoomId)}", e));
- await _logRoom.SendMessageEventAsync(
- MessageFormatter.FormatException($"Unable to ban user in {MessageFormatter.HtmlFormatMention(room.RoomId)}", e));
- await using var stream = new MemoryStream(e.ToString().AsBytes().ToArray());
- await _controlRoom.SendFileAsync("error.log.cs", stream);
- await _logRoom.SendFileAsync("error.log.cs", stream);
- }
- });
- }
-
- /// <summary>Triggered when the application host is performing a graceful shutdown.</summary>
- /// <param name="cancellationToken">Indicates that the shutdown process should no longer be graceful.</param>
- public async Task StopAsync(CancellationToken cancellationToken) {
- logger.LogInformation("Shutting down bot!");
- }
-
- private async Task<StateEventResponse?> CheckMedia(StateEventResponse @event) {
- var stateList = _policyRoom.GetFullStateAsync();
- var hashAlgo = SHA3_256.Create();
-
- var mxcUri = @event.RawContent["url"].GetValue<string>();
- var resolvedUri = await hsResolver.ResolveMediaUri(mxcUri.Split('/')[2], mxcUri);
- var uriHash = hashAlgo.ComputeHash(mxcUri.AsBytes().ToArray());
- byte[]? fileHash = null;
-
- try {
- fileHash = await hashAlgo.ComputeHashAsync(await hs._httpClient.GetStreamAsync(resolvedUri));
- }
- catch (Exception ex) {
- await _logRoom.SendMessageEventAsync(
- MessageFormatter.FormatException($"Error calculating file hash for {mxcUri} via {mxcUri.Split('/')[2]} ({resolvedUri}), retrying via {hs.BaseUrl}...",
- ex));
- try {
- resolvedUri = await hsResolver.ResolveMediaUri(hs.BaseUrl, mxcUri);
- fileHash = await hashAlgo.ComputeHashAsync(await hs._httpClient.GetStreamAsync(resolvedUri));
- }
- catch (Exception ex2) {
- await _logRoom.SendMessageEventAsync(
- MessageFormatter.FormatException($"Error calculating file hash via {hs.BaseUrl} ({resolvedUri})!", ex2));
- }
- }
-
- logger.LogInformation("Checking media {url} with hash {hash}", resolvedUri, fileHash);
-
- await foreach (var state in stateList) {
- if (state.Type != "gay.rory.media_moderator_poc.rule.media" && state.Type != "gay.rory.media_moderator_poc.rule.server") continue;
- if (!state.RawContent.ContainsKey("entity")) {
- logger.LogWarning("Rule {rule} has no entity, this event was probably redacted!", state.StateKey);
- continue;
- }
-
- logger.LogInformation("Checking rule {rule}: {data}", state.StateKey, state.TypedContent.ToJson(ignoreNull: true, indent: false));
- var rule = state.TypedContent as MediaPolicyEventContent;
- if (state.Type == "gay.rory.media_moderator_poc.rule.server" && rule.ServerEntity is not null) {
- rule.ServerEntity = rule.ServerEntity.Replace("\\*", ".*").Replace("\\?", ".");
- var regex = new Regex($"mxc://({rule.ServerEntity})/.*", RegexOptions.Compiled | RegexOptions.IgnoreCase);
- if (regex.IsMatch(@event.RawContent["url"]!.GetValue<string>())) {
- logger.LogInformation("{url} matched rule {rule}", @event.RawContent["url"], rule.ToJson(ignoreNull: true));
- return state;
- }
- }
-
- if (rule.Entity is not null && uriHash.SequenceEqual(rule.Entity)) {
- logger.LogInformation("{url} matched rule {rule} by uri hash", @event.RawContent["url"], rule.ToJson(ignoreNull: true));
- return state;
- }
-
- logger.LogInformation("uri hash {uriHash} did not match rule's {ruleUriHash}", Convert.ToBase64String(uriHash), Convert.ToBase64String(rule.Entity));
-
- if (rule.FileHash is not null && fileHash is not null && rule.FileHash.SequenceEqual(fileHash)) {
- logger.LogInformation("{url} matched rule {rule} by file hash", @event.RawContent["url"], rule.ToJson(ignoreNull: true));
- return state;
- }
-
- logger.LogInformation("file hash {fileHash} did not match rule's {ruleFileHash}", Convert.ToBase64String(fileHash), Convert.ToBase64String(rule.FileHash));
-
- //check pixels every 10% of the way through the image using ImageSharp
- // var image = Image.Load(await _hs._httpClient.GetStreamAsync(resolvedUri));
- }
-
- logger.LogInformation("{url} did not match any rules", @event.RawContent["url"]);
-
- return null;
- }
-}
|
