From 9e0e53a428b162b59fa8317949dcaeda6c1e1fdb Mon Sep 17 00:00:00 2001
From: sam <sam@starshines.gay>
Date: Mon, 2 Sep 2024 15:05:32 +0200
Subject: [PATCH] feat: add channel delete event

---
 .../Channels/ChannelDeleteResponder.cs        | 55 +++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 Catalogger.Backend/Bot/Responders/Channels/ChannelDeleteResponder.cs

diff --git a/Catalogger.Backend/Bot/Responders/Channels/ChannelDeleteResponder.cs b/Catalogger.Backend/Bot/Responders/Channels/ChannelDeleteResponder.cs
new file mode 100644
index 0000000..ecced61
--- /dev/null
+++ b/Catalogger.Backend/Bot/Responders/Channels/ChannelDeleteResponder.cs
@@ -0,0 +1,55 @@
+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.Abstractions.Gateway.Events;
+using Remora.Discord.Extensions.Embeds;
+using Remora.Discord.Gateway.Responders;
+using Remora.Results;
+
+namespace Catalogger.Backend.Bot.Responders.Channels;
+
+public class ChannelDeleteResponder(
+    ILogger logger,
+    DatabaseContext db,
+    ChannelCache channelCache,
+    WebhookExecutorService webhookExecutor) : IResponder<IChannelDelete>
+{
+    private readonly ILogger _logger = logger.ForContext<ChannelDeleteResponder>();
+
+    public async Task<Result> RespondAsync(IChannelDelete evt, CancellationToken ct = default)
+    {
+        if (!evt.GuildID.IsDefined())
+        {
+            _logger.Debug("Deleted channel {ChannelId} is not in a guild", evt.ID);
+            return Result.Success;
+        }
+
+        if (!channelCache.TryGet(evt.ID, out var channel))
+        {
+            _logger.Information("Deleted channel {ChannelId} not found in the cache", evt.ID);
+            channelCache.Remove(evt.GuildID.OrDefault(), evt.ID, out _);
+            return Result.Success;
+        }
+
+        var guildConfig = await db.GetGuildAsync(evt.GuildID.Value, ct);
+        var embed = new EmbedBuilder()
+            .WithTitle("Channel deleted")
+            .WithColour(DiscordUtils.Red)
+            .WithFooter($"ID: {evt.ID}")
+            .WithCurrentTimestamp()
+            .WithDescription($"**Name:** {channel.Name.Value}");
+
+        if (channel.ParentID.IsDefined(out var parentId) && channelCache.TryGet(parentId.Value, out var category))
+            embed.Description += $"\n**Category:** {category.Name}";
+        else
+            embed.Description += "\n**Category:** (none)";
+
+        if (channel.Topic.IsDefined(out var topic))
+            embed.AddField("Description", topic);
+
+        await webhookExecutor.QueueLogAsync(guildConfig, LogChannelType.ChannelDelete, embed.Build().GetOrThrow());
+        return Result.Success;
+    }
+}
\ No newline at end of file