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

* refactor(helpers): separate functions into files

* idk

* idk

src/helpers/channels/is_channel_synced.ts

@@ -0,0 +1,20 @@
+import { cacheHandlers } from "../../cache.ts";
+
+/** Checks whether a channel is synchronized with its parent/category channel or not. */
+export async function isChannelSynced(channelID: string) {
+  const channel = await cacheHandlers.get("channels", channelID);
+  if (!channel?.parentID) return false;
+
+  const parentChannel = await cacheHandlers.get("channels", channel.parentID);
+  if (!parentChannel) return false;
+
+  return channel.permissionOverwrites?.every((overwrite) => {
+    const permission = parentChannel.permissionOverwrites?.find(
+      (ow) => ow.id === overwrite.id,
+    );
+    if (!permission) return false;
+    return !(
+      overwrite.allow !== permission.allow || overwrite.deny !== permission.deny
+    );
+  });
+}