add: getThreadMembers

src/helpers/channels/threads/get_thread_members.ts

@@ -0,0 +1,26 @@
+import { cacheHandlers } from "../../../cache.ts";
+import { rest } from "../../../rest/rest.ts";
+import { ChannelTypes } from "../../../types/channels/channel_types.ts";
+import { Errors } from "../../../types/misc/errors.ts";
+import { endpoints } from "../../../util/constants.ts";
+
+// TODO(threads): it seems like the documented return type is wrong
+/** Returns array of thread members objects that are members of the thread. */
+export async function getThreadMembers(channelId: string) {
+  // TODO(threads): perm check
+  // TODO(threads): intents check
+  const channel = await cacheHandlers.get("channels", channelId);
+  if (channel) {
+    if (
+      ![
+        ChannelTypes.GuildNewsThread,
+        ChannelTypes.GuildPivateThread,
+        ChannelTypes.GuildPublicThread,
+      ].includes(channel.type)
+    ) {
+      throw new Error(Errors.NOT_A_THREAD_CHANNEL);
+    }
+  }
+
+  return await rest.runMethod("get", endpoints.THREAD_MEMBERS(channelId));
+}