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author | Emma [it/its]@Rory& <root@rory.gay> | 2023-11-23 05:42:33 +0100 |
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committer | Emma [it/its]@Rory& <root@rory.gay> | 2023-11-23 05:42:33 +0100 |
commit | 3e934eee892f69a8f78b94950993000522702769 (patch) | |
tree | 6aa0d3d26c9a07a7a3e097fe28abb785400bfbd6 /ExampleBots/ModerationBot/Commands/BanMediaCommand.cs | |
parent | Add license retroactively, matching where the code originated from (MatrixRoo... (diff) | |
download | LibMatrix-3e934eee892f69a8f78b94950993000522702769.tar.xz |
Moderation bot work
Diffstat (limited to 'ExampleBots/ModerationBot/Commands/BanMediaCommand.cs')
-rw-r--r-- | ExampleBots/ModerationBot/Commands/BanMediaCommand.cs | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/ExampleBots/ModerationBot/Commands/BanMediaCommand.cs b/ExampleBots/ModerationBot/Commands/BanMediaCommand.cs new file mode 100644 index 0000000..21e0a94 --- /dev/null +++ b/ExampleBots/ModerationBot/Commands/BanMediaCommand.cs @@ -0,0 +1,113 @@ +using System.Buffers.Text; +using System.Security.Cryptography; +using ArcaneLibs.Extensions; +using LibMatrix; +using LibMatrix.EventTypes.Spec; +using LibMatrix.Helpers; +using LibMatrix.Services; +using LibMatrix.Utilities.Bot.Interfaces; +using ModerationBot.AccountData; +using ModerationBot.StateEventTypes; +using ModerationBot.StateEventTypes.Policies.Implementations; + +namespace ModerationBot.Commands; + +public class BanMediaCommand(IServiceProvider services, HomeserverProviderService hsProvider, HomeserverResolverService hsResolver, PolicyEngine engine) : ICommand { + public string Name { get; } = "banmedia"; + public string Description { get; } = "Create a policy banning a piece of media, must be used in reply to a message"; + + public async Task<bool> CanInvoke(CommandContext ctx) { + //check if user is admin in control room + var botData = await ctx.Homeserver.GetAccountDataAsync<BotData>("gay.rory.moderation_bot_data"); + var controlRoom = ctx.Homeserver.GetRoom(botData.ControlRoom); + var isAdmin = (await controlRoom.GetPowerLevelsAsync())!.UserHasPermission(ctx.MessageEvent.Sender, "m.room.ban"); + if (!isAdmin) { + // await ctx.Reply("You do not have permission to use this command!"); + await ctx.Homeserver.GetRoom(botData.LogRoom!).SendMessageEventAsync( + new RoomMessageEventContent(body: $"User {ctx.MessageEvent.Sender} tried to use command {Name} but does not have permission!", messageType: "m.text")); + } + + return isAdmin; + } + + public async Task Invoke(CommandContext ctx) { + + var botData = await ctx.Homeserver.GetAccountDataAsync<BotData>("gay.rory.moderation_bot_data"); + var policyRoom = ctx.Homeserver.GetRoom(botData.DefaultPolicyRoom ?? botData.ControlRoom); + var logRoom = ctx.Homeserver.GetRoom(botData.LogRoom ?? botData.ControlRoom); + + //check if reply + var messageContent = ctx.MessageEvent.TypedContent as RoomMessageEventContent; + if (messageContent?.RelatesTo is { InReplyTo: not null }) { + try { + await logRoom.SendMessageEventAsync( + new RoomMessageEventContent( + body: $"User {MessageFormatter.HtmlFormatMention(ctx.MessageEvent.Sender)} is trying to ban media {messageContent!.RelatesTo!.InReplyTo!.EventId}", + messageType: "m.text")); + + //get replied message + var repliedMessage = await ctx.Room.GetEventAsync<StateEventResponse>(messageContent.RelatesTo!.InReplyTo!.EventId); + + //check if recommendation is in list + if (ctx.Args.Length < 2) { + await ctx.Room.SendMessageEventAsync(MessageFormatter.FormatError("You must specify a recommendation type and reason!")); + return; + } + + var recommendation = ctx.Args[0]; + + if (recommendation is not ("ban" or "kick" or "mute" or "redact" or "spoiler" or "warn" or "warn_admins")) { + await ctx.Room.SendMessageEventAsync( + MessageFormatter.FormatError( + $"Invalid recommendation type {recommendation}, must be `warn_admins`, `warn`, `spoiler`, `redact`, `mute`, `kick` or `ban`!")); + return; + } + + //hash file + var mxcUri = (repliedMessage.TypedContent as RoomMessageEventContent).Url!; + var resolvedUri = await hsResolver.ResolveMediaUri(mxcUri.Split('/')[2], mxcUri); + var hashAlgo = SHA3_256.Create(); + var uriHash = hashAlgo.ComputeHash(mxcUri.AsBytes().ToArray()); + byte[]? fileHash = null; + + try { + fileHash = await hashAlgo.ComputeHashAsync(await ctx.Homeserver.ClientHttpClient.GetStreamAsync(resolvedUri)); + } + catch (Exception ex) { + await logRoom.SendMessageEventAsync( + MessageFormatter.FormatException($"Error calculating file hash for {mxcUri} via {mxcUri.Split('/')[2]}, retrying via {ctx.Homeserver.BaseUrl}...", + ex)); + try { + resolvedUri = await hsResolver.ResolveMediaUri(ctx.Homeserver.BaseUrl, mxcUri); + fileHash = await hashAlgo.ComputeHashAsync(await ctx.Homeserver.ClientHttpClient.GetStreamAsync(resolvedUri)); + } + catch (Exception ex2) { + await ctx.Room.SendMessageEventAsync(MessageFormatter.FormatException("Error calculating file hash", ex2)); + await logRoom.SendMessageEventAsync( + MessageFormatter.FormatException($"Error calculating file hash via {ctx.Homeserver.BaseUrl}!", ex2)); + } + } + + MediaPolicyFile policy; + await policyRoom.SendStateEventAsync("gay.rory.moderation.rule.media", Guid.NewGuid().ToString(), policy = new MediaPolicyFile { + Entity = Convert.ToBase64String(uriHash), + FileHash = Convert.ToBase64String(fileHash), + Reason = string.Join(' ', ctx.Args[1..]), + Recommendation = recommendation, + }); + + await ctx.Room.SendMessageEventAsync(MessageFormatter.FormatSuccessJson("Media policy created", policy)); + await logRoom.SendMessageEventAsync(MessageFormatter.FormatSuccessJson("Media policy created", policy)); + } + catch (Exception e) { + await logRoom.SendMessageEventAsync(MessageFormatter.FormatException("Error creating policy", e)); + await ctx.Room.SendMessageEventAsync(MessageFormatter.FormatException("Error creating policy", e)); + await using var stream = new MemoryStream(e.ToString().AsBytes().ToArray()); + await logRoom.SendFileAsync("error.log.cs", stream); + } + } + else { + await ctx.Room.SendMessageEventAsync(MessageFormatter.FormatError("This command must be used in reply to a message!")); + } + } +} |