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

* refactor(helpers): separate functions into files

* idk

* idk

src/helpers/messages/delete_messages.ts

@@ -0,0 +1,33 @@
+import { RequestManager } from "../../rest/request_manager.ts";
+import { Errors } from "../../types/mod.ts";
+import { endpoints } from "../../util/constants.ts";
+import { requireBotChannelPermissions } from "../../util/permissions.ts";
+
+/** Delete messages from the channel. 2-100. Requires the MANAGE_MESSAGES permission */
+export async function deleteMessages(
+  channelID: string,
+  ids: string[],
+  reason?: string,
+) {
+  await requireBotChannelPermissions(channelID, ["MANAGE_MESSAGES"]);
+
+  if (ids.length < 2) {
+    throw new Error(Errors.DELETE_MESSAGES_MIN);
+  }
+
+  if (ids.length > 100) {
+    console.warn(
+      `This endpoint only accepts a maximum of 100 messages. Deleting the first 100 message ids provided.`,
+    );
+  }
+
+  const result = await RequestManager.post(
+    endpoints.CHANNEL_BULK_DELETE(channelID),
+    {
+      messages: ids.splice(0, 100),
+      reason,
+    },
+  );
+
+  return result;
+}