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

* refactor(helpers): separate functions into files

* idk

* idk

src/helpers/channels/get_channel.ts

@@ -0,0 +1,25 @@
+import { cacheHandlers } from "../../cache.ts";
+import { RequestManager } from "../../rest/request_manager.ts";
+import { structures } from "../../structures/mod.ts";
+import { ChannelCreatePayload } from "../../types/mod.ts";
+import { endpoints } from "../../util/constants.ts";
+
+/** Fetches a single channel object from the api.
+ *
+ * ⚠️ **If you need this, you are probably doing something wrong. This is not intended for use. Your channels will be cached in your guild.**
+ */
+export async function getChannel(channelID: string, addToCache = true) {
+  const result = (await RequestManager.get(
+    endpoints.CHANNEL_BASE(channelID),
+  )) as ChannelCreatePayload;
+
+  const channelStruct = await structures.createChannelStruct(
+    result,
+    result.guild_id,
+  );
+  if (addToCache) {
+    await cacheHandlers.set("channels", channelStruct.id, channelStruct);
+  }
+
+  return channelStruct;
+}