Merge pull request #858 from existentiality/main

feat: implement channel cloning

src/helpers/channels/clone_channel.ts

@@ -0,0 +1,38 @@
+import { cacheHandlers } from "../../cache.ts";
+import { createChannel } from "./create_channel.ts";
+import { Errors } from "../../types/misc/errors.ts";
+import { DiscordChannelTypes } from "../../types/channels/channel_types.ts";
+import { calculatePermissions } from "../../util/permissions.ts";
+import { Overwrite } from "../../types/channels/overwrite.ts";
+
+/** Create a copy of a channel */
+export async function cloneChannel(channelId: string, reason?: string) {
+  const channelToClone = await cacheHandlers.get("channels", channelId);
+  //Return undefined if channel is not cached
+  if (!channelToClone) throw new Error(Errors.CHANNEL_NOT_FOUND);
+
+  //Check for DM channel
+  if (
+    channelToClone.type === DiscordChannelTypes.DM ||
+    channelToClone.type === DiscordChannelTypes.GROUP_DM
+  ) {
+    throw new Error(Errors.CHANNEL_NOT_IN_GUILD);
+  }
+
+  //Convert channel permission
+  const newOverwrites: Overwrite[] = [];
+
+  channelToClone.permissionOverwrites.forEach((overwrite) => {
+    newOverwrites.push({
+      id: overwrite.id,
+      type: overwrite.type,
+      allow: calculatePermissions(BigInt(overwrite.allow)),
+      deny: calculatePermissions(BigInt(overwrite.deny)),
+    });
+  });
+
+  channelToClone.permissionOverwrites = newOverwrites;
+
+  //Create the channel (also handles permissions)
+  return createChannel(channelToClone.guildId!, channelToClone, reason);
+}