Moderation bot work

1 files changed, 0 insertions, 339 deletions

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;
-    }
-}