feat: add message update handler
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3 changed files with 159 additions and 0 deletions
125
Catalogger.Backend/Bot/Responders/MessageUpdateResponder.cs
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125
Catalogger.Backend/Bot/Responders/MessageUpdateResponder.cs
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@ -0,0 +1,125 @@
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using Catalogger.Backend.Cache;
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using Catalogger.Backend.Database;
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using Catalogger.Backend.Database.Queries;
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using Catalogger.Backend.Extensions;
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using Catalogger.Backend.Services;
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using Remora.Discord.API;
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using Remora.Discord.API.Abstractions.Gateway.Events;
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using Remora.Discord.API.Abstractions.Objects;
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using Remora.Discord.API.Gateway.Events;
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using Remora.Discord.API.Objects;
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using Remora.Discord.Extensions.Embeds;
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using Remora.Discord.Gateway.Responders;
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using Remora.Results;
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namespace Catalogger.Backend.Bot.Responders;
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public class MessageUpdateResponder(
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ILogger logger,
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DatabaseContext db,
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ChannelCacheService channelCache,
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UserCacheService userCache,
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MessageRepository messageRepository,
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WebhookExecutorService webhookExecutor) : IResponder<IMessageUpdate>
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{
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private readonly ILogger _logger = logger.ForContext<MessageUpdateResponder>();
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public async Task<Result> RespondAsync(IMessageUpdate evt, CancellationToken ct = default)
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{
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// Discord only *very* recently changed message update events to have all fields,
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// so we convert the event to a MessageCreate to avoid having to unwrap every single field
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var msg = ConvertToMessageCreate(evt);
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if (!msg.GuildID.IsDefined())
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{
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_logger.Debug("Received message create event for message {MessageId} despite it not being in a guild",
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msg.ID);
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return Result.Success;
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}
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_logger.Debug("Guild is {GuildId}", msg.GuildID.Value);
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var guildConfig = await db.GetGuildAsync(msg.GuildID.Value, ct);
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if (await messageRepository.IsMessageIgnoredAsync(msg.ID.Value, ct))
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{
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_logger.Debug("Message {MessageId} should be ignored", msg.ID);
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return Result.Success;
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}
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var logChannel = webhookExecutor.GetLogChannel(guildConfig, LogChannelType.MessageUpdate, msg.ChannelID,
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msg.Author.ID.Value);
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if (logChannel == null) return Result.Success;
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try
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{
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var oldMessage = await messageRepository.GetMessageAsync(msg.ID.Value, ct);
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if (oldMessage == null)
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{
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logger.Debug("Message {Id} was edited and should be logged but is not in the database", msg.ID);
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return Result.Success;
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}
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if (oldMessage.Content == msg.Content) return Result.Success;
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var user = msg.Author;
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if (msg.Author.ID != oldMessage.UserId)
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{
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var systemAccount = await userCache.GetUserAsync(DiscordSnowflake.New(oldMessage.UserId));
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if (systemAccount != null) user = systemAccount;
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}
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var embedBuilder = new EmbedBuilder()
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.WithAuthor(user.Tag(), null, user.AvatarUrl())
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.WithTitle("Message edited")
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.WithDescription(oldMessage.Content)
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.WithColour(DiscordUtils.Purple)
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.WithFooter($"ID: {msg.ID}")
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.WithTimestamp(msg.ID.Timestamp);
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var fields = Enumerable.Range(0, msg.Content.Length / 1000)
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.Select(i => msg.Content.Substring(i * 1000, 1000))
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.Select<string, IEmbedField>((s, i) =>
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new EmbedField($"New content{(i != 0 ? " (cont.)" : "")}", s, false))
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.ToList();
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embedBuilder.SetFields(fields);
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string channelMention;
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if (!channelCache.TryGet(msg.ChannelID, out var channel))
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channelMention = $"<#{msg.ChannelID}>";
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else if (channel.Type is ChannelType.AnnouncementThread or ChannelType.PrivateThread
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or ChannelType.PublicThread)
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channelMention =
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$"<#{channel.ParentID.Value}>\nID: {channel.ParentID.Value}\n\nThread: {channel.Name} (<#{channel.ID}>)";
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else channelMention = $"<#{channel.ID}>\nID: {channel.ID}";
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embedBuilder.AddField("Channel", channelMention, true);
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embedBuilder.AddField("Sender", $"<@{user.ID}>\n{user.Tag()}\nID: {user.ID}", true);
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if (oldMessage is { System: not null, Member: not null })
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{
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embedBuilder.WithTitle($"Message by {msg.Author.Username} edited");
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embedBuilder.AddField("\u200b", "**PluralKit information**", false);
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embedBuilder.AddField("System ID", oldMessage.System, true);
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embedBuilder.AddField("Member ID", oldMessage.Member, true);
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}
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embedBuilder.AddField("Link", $"https://discord.com/channels/{msg.GuildID}/{msg.ChannelID}/{msg.ID}");
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await webhookExecutor.QueueLogAsync(logChannel.Value, embedBuilder.Build().GetOrThrow());
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return Result.Success;
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}
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finally
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{
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await messageRepository.UpdateMessageAsync(msg, ct);
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}
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}
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private static MessageCreate ConvertToMessageCreate(IMessageUpdate evt) => new(evt.GuildID, evt.Member,
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evt.Mentions.GetOrThrow(), evt.ID.GetOrThrow(), evt.ChannelID.GetOrThrow(), evt.Author.GetOrThrow(),
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evt.Content.GetOrThrow(), evt.Timestamp.GetOrThrow(), evt.EditedTimestamp.GetOrThrow(), IsTTS: false,
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evt.MentionsEveryone.GetOrThrow(), evt.MentionedRoles.GetOrThrow(), evt.MentionedChannels,
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evt.Attachments.GetOrThrow(), evt.Embeds.GetOrThrow(), evt.Reactions, evt.Nonce, evt.IsPinned.GetOrThrow(),
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evt.WebhookID, evt.Type.GetOrThrow(), evt.Activity, evt.Application, evt.ApplicationID, evt.MessageReference,
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evt.Flags, evt.ReferencedMessage, evt.Interaction, evt.Thread, evt.Components, evt.StickerItems, evt.Position,
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evt.Resolved, evt.InteractionMetadata, evt.Poll);
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}
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@ -36,6 +36,37 @@ public class MessageRepository(ILogger logger, DatabaseContext db, IEncryptionSe
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await db.SaveChangesAsync(ct);
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}
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public async Task UpdateMessageAsync(IMessageCreate msg, CancellationToken ct = default)
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{
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_logger.Debug("Updating message {MessageId}", msg.ID);
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var tx = await db.Database.BeginTransactionAsync(ct);
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var (isStored, _) = await HasProxyInfoAsync(msg.ID.Value);
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if (!isStored)
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{
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await SaveMessageAsync(msg, ct);
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}
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else
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{
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var metadata = new Metadata(IsWebhook: msg.WebhookID.HasValue,
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msg.Attachments.Select(a => new Attachment(a.Filename, a.Size, a.ContentType.Value)));
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var dbMsg = await db.Messages.FindAsync(msg.ID.Value);
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if (dbMsg == null) throw new CataloggerError("Message was null despite HasProxyInfoAsync returning true");
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dbMsg.EncryptedContent = await Task.Run(
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() => encryptionService.Encrypt(string.IsNullOrWhiteSpace(msg.Content) ? "None" : msg.Content), ct);
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dbMsg.EncryptedUsername = await Task.Run(() => encryptionService.Encrypt(msg.Author.Tag()), ct);
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dbMsg.EncryptedMetadata =
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await Task.Run(() => encryptionService.Encrypt(JsonSerializer.Serialize(metadata)), ct);
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db.Update(dbMsg);
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await db.SaveChangesAsync(ct);
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}
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await tx.CommitAsync(ct);
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}
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public async Task<Message?> GetMessageAsync(ulong id, CancellationToken ct = default)
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{
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_logger.Debug("Retrieving message {MessageId}", id);
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@ -50,6 +50,9 @@ public static class DiscordExtensions
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return result.Entity;
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}
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public static T GetOrThrow<T>(this Optional<T> optional) =>
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optional.OrThrow(() => new CataloggerError("Optional<T> was unset"));
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public static async Task<T> GetOrThrow<T>(this Task<Result<T>> result) => (await result).GetOrThrow();
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public static async Task<Result> UpdateMessageAsync(this IDiscordRestInteractionAPI interactionApi,
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