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

* refactor(helpers): separate functions into files

* idk

* idk

src/helpers/guilds/get_prune_count.ts

@@ -0,0 +1,22 @@
+import { RequestManager } from "../../rest/request_manager.ts";
+import { Errors, PruneOptions, PrunePayload } from "../../types/mod.ts";
+import { endpoints } from "../../util/constants.ts";
+import { requireBotGuildPermissions } from "../../util/permissions.ts";
+import { camelKeysToSnakeCase, urlToBase64 } from "../../util/utils.ts";
+
+/** Check how many members would be removed from the server in a prune operation. Requires the KICK_MEMBERS permission */
+export async function getPruneCount(guildID: string, options?: PruneOptions) {
+  if (options?.days && options.days < 1) throw new Error(Errors.PRUNE_MIN_DAYS);
+  if (options?.days && options.days > 30) {
+    throw new Error(Errors.PRUNE_MAX_DAYS);
+  }
+
+  await requireBotGuildPermissions(guildID, ["KICK_MEMBERS"]);
+
+  const result = await RequestManager.get(
+    endpoints.GUILD_PRUNE(guildID),
+    camelKeysToSnakeCase(options ?? {}),
+  ) as PrunePayload;
+
+  return result.pruned;
+}