add: delete thread functionality

src/helpers/channels/delete_channel.ts

@@ -1,27 +1,40 @@
 import { cacheHandlers } from "../../cache.ts";
 import { rest } from "../../rest/rest.ts";
 import { Errors } from "../../types/misc/errors.ts";
+import { ChannelTypes } from "../../types/mod.ts";
 import { endpoints } from "../../util/constants.ts";
 import { requireBotGuildPermissions } from "../../util/permissions.ts";
 
 /** Delete a channel in your server. Bot needs MANAGE_CHANNEL permissions in the server. */
 export async function deleteChannel(
-  guildId: string,
   channelId: string,
   reason?: string,
-): Promise<undefined> {
-  await requireBotGuildPermissions(guildId, ["MANAGE_CHANNELS"]);
+) {
+  const channel = await cacheHandlers.get("channels", channelId);
 
-  const guild = await cacheHandlers.get("guilds", guildId);
+  if (channel?.guildId) {
+    const guild = await cacheHandlers.get("guilds", channel.guildId);
     if (!guild) throw new Error(Errors.GUILD_NOT_FOUND);
 
-  if (guild?.rulesChannelId === channelId) {
+    // TODO(threads): check if this requires guild perms or channel is enough
+    await requireBotGuildPermissions(
+      guild,
+      [
+          ChannelTypes.GuildNewsThread,
+          ChannelTypes.GuildPivateThread,
+          ChannelTypes.GuildPublicThread,
+        ].includes(channel.type)
+        ? ["MANAGE_THREADS"]
+        : ["MANAGE_CHANNELS"],
+    );
+    if (guild.rulesChannelId === channelId) {
       throw new Error(Errors.RULES_CHANNEL_CANNOT_BE_DELETED);
     }
 
-  if (guild?.publicUpdatesChannelId === channelId) {
+    if (guild.publicUpdatesChannelId === channelId) {
       throw new Error(Errors.UPDATES_CHANNEL_CANNOT_BE_DELETED);
     }
+  }
 
   return await rest.runMethod<undefined>(
     "delete",