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

* refactor(helpers): separate functions into files

* idk

* idk

src/helpers/invites/create_invite.ts

@@ -0,0 +1,33 @@
+import { RequestManager } from "../../rest/request_manager.ts";
+import { CreateInviteOptions } from "../../types/mod.ts";
+import { endpoints } from "../../util/constants.ts";
+import { requireBotChannelPermissions } from "../../util/permissions.ts";
+
+/** Creates a new invite for this channel. Requires CREATE_INSTANT_INVITE */
+export async function createInvite(
+  channelID: string,
+  options: CreateInviteOptions,
+) {
+  await requireBotChannelPermissions(channelID, ["CREATE_INSTANT_INVITE"]);
+
+  if (options.max_age && (options.max_age > 604800 || options.max_age < 0)) {
+    console.log(
+      `The max age for invite created in ${channelID} was not between 0-604800. Using default values instead.`,
+    );
+    options.max_age = undefined;
+  }
+
+  if (options.max_uses && (options.max_uses > 100 || options.max_uses < 0)) {
+    console.log(
+      `The max uses for invite created in ${channelID} was not between 0-100. Using default values instead.`,
+    );
+    options.max_uses = undefined;
+  }
+
+  const result = await RequestManager.post(
+    endpoints.CHANNEL_INVITES(channelID),
+    options,
+  );
+
+  return result;
+}