feat: emoji update event

2024-10-14 17:09:12 +02:00 · 2024-10-14 17:09:12 +02:00 · 4f718cde20
commit 4f718cde20
parent f1c75124a8
7 changed files with 174 additions and 2 deletions
--- a/Catalogger.Backend/Bot/Responders/Guilds/GuildEmojisUpdateResponder.cs
+++ b/Catalogger.Backend/Bot/Responders/Guilds/GuildEmojisUpdateResponder.cs
@ -0,0 +1,128 @@
+// Copyright (C) 2021-present sam (starshines.gay)
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+using Catalogger.Backend.Cache.InMemoryCache;
+using Catalogger.Backend.Database;
+using Catalogger.Backend.Database.Queries;
+using Catalogger.Backend.Extensions;
+using Catalogger.Backend.Services;
+using Remora.Discord.API;
+using Remora.Discord.API.Abstractions.Gateway.Events;
+using Remora.Discord.API.Abstractions.Objects;
+using Remora.Discord.Extensions.Embeds;
+using Remora.Discord.Gateway.Responders;
+using Remora.Results;
+
+namespace Catalogger.Backend.Bot.Responders.Guilds;
+
+public class GuildEmojisUpdateResponder(
+    ILogger logger,
+    DatabaseContext db,
+    EmojiCache emojiCache,
+    WebhookExecutorService webhookExecutor
+) : IResponder<IGuildEmojisUpdate>
+{
+    private readonly ILogger _logger = logger.ForContext<GuildEmojisUpdateResponder>();
+
+    public async Task<Result> RespondAsync(IGuildEmojisUpdate evt, CancellationToken ct = default)
+    {
+        try
+        {
+            if (!emojiCache.TryGet(evt.GuildID, out var oldEmoji))
+            {
+                _logger.Information(
+                    "Previous emoji for {GuildId} were not in cache, ignoring event",
+                    evt.GuildID
+                );
+                return Result.Success;
+            }
+
+            IEmbed embed;
+
+            // As far as I know, only one emoji can be added or removed at once.
+            var added = evt.Emojis.FirstOrDefault(e => oldEmoji.All(o => o.ID != e.ID));
+            var removed = oldEmoji.FirstOrDefault(o => evt.Emojis.All(e => o.ID != e.ID));
+            var updated = evt.Emojis.FirstOrDefault(e =>
+                oldEmoji.Any(o => o.ID == e.ID && o.Name != e.Name)
+            );
+            if (added != null)
+            {
+                var url = CDN.GetEmojiUrl(added).GetOrThrow().ToString();
+                embed = new EmbedBuilder()
+                    .WithTitle("Emoji created")
+                    .WithDescription($"{FormatEmoji(added)} [{added.Name}]({url})")
+                    .WithThumbnailUrl(url)
+                    .WithFooter($"ID: {added.ID}")
+                    .WithColour(DiscordUtils.Green)
+                    .WithCurrentTimestamp()
+                    .Build()
+                    .GetOrThrow();
+            }
+            else if (removed != null)
+            {
+                var url = CDN.GetEmojiUrl(removed).GetOrThrow().ToString();
+                embed = new EmbedBuilder()
+                    .WithTitle("Emoji removed")
+                    .WithDescription($"[{removed.Name}]({url})")
+                    .WithThumbnailUrl(url)
+                    .WithFooter($"ID: {removed.ID}")
+                    .WithColour(DiscordUtils.Red)
+                    .WithCurrentTimestamp()
+                    .Build()
+                    .GetOrThrow();
+            }
+            else if (updated != null)
+            {
+                var url = CDN.GetEmojiUrl(updated).GetOrThrow().ToString();
+                var previous = oldEmoji.First(o => o.ID == updated.ID);
+                embed = new EmbedBuilder()
+                    .WithTitle("Emoji renamed")
+                    .WithDescription(
+                        $"""
+                        {FormatEmoji(updated)} [{updated.Name}]({url})
+                        {previous.Name} → {updated.Name}
+                        """
+                    )
+                    .WithThumbnailUrl(url)
+                    .WithFooter($"ID: {updated.ID}")
+                    .WithColour(DiscordUtils.Green)
+                    .WithCurrentTimestamp()
+                    .Build()
+                    .GetOrThrow();
+            }
+            else
+            {
+                _logger.Warning(
+                    "Received emoji update event for {GuildId} but all emoji were identical, not logging",
+                    evt.GuildID
+                );
+                return Result.Success;
+            }
+
+            var guildConfig = await db.GetGuildAsync(evt.GuildID, ct);
+            webhookExecutor.QueueLog(guildConfig, LogChannelType.GuildEmojisUpdate, embed);
+            return Result.Success;
+        }
+        finally
+        {
+            emojiCache.Set(evt.GuildID, evt.Emojis);
+        }
+    }
+
+    private static string FormatEmoji(IEmoji emoji) =>
+        emoji.IsAnimated.OrDefault(false)
+            ? $"<a:{emoji.Name}:{emoji.ID}>"
+            : $"<:{emoji.Name}:{emoji.ID}>";
+}