refactor(helpers): separate functions into files (#667)

* refactor(helpers): separate functions into files

* idk

* idk

src/helpers/channels/delete_channel.ts

@@ -0,0 +1,32 @@
+import { cacheHandlers } from "../../cache.ts";
+import { RequestManager } from "../../rest/request_manager.ts";
+import { Errors } 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,
+) {
+  await requireBotGuildPermissions(guildID, ["MANAGE_CHANNELS"]);
+
+  const guild = await cacheHandlers.get("guilds", guildID);
+  if (!guild) throw new Error(Errors.GUILD_NOT_FOUND);
+
+  if (guild?.rulesChannelID === channelID) {
+    throw new Error(Errors.RULES_CHANNEL_CANNOT_BE_DELETED);
+  }
+
+  if (guild?.publicUpdatesChannelID === channelID) {
+    throw new Error(Errors.UPDATES_CHANNEL_CANNOT_BE_DELETED);
+  }
+
+  const result = await RequestManager.delete(
+    endpoints.CHANNEL_BASE(channelID),
+    { reason },
+  );
+
+  return result;
+}