Added: js style docs for sublevel utils

src/controller/utils/sublevel.js

@@ -1,10 +1,26 @@
 const Sublevel = require("../../models/Sublevel");
-const Level = require("../../models/Level");
+// const Level = require("../../models/Level");
 
-// exports.moveSublevel = async (sub_level_id, under_sub_or_level_id, isMainLevel) => {
+/**
-  
+ * To move a sub level
-// };
+ * @param {string} sub_level_id The Sublevel to me moved
+ * @param {string} parent_sub_or_level_id The Level/Sublevel under which to be moved
+ * @returns {{success: boolean, message: string}}
+ */
+exports.moveSublevel = async (sub_level_id, parent_sub_or_level_id) => {
+  /**
+   * - Check if depths of parent_sub_level_id and parent_sub_or_level_id are same
+   * - Copy and add references
+   * - Delete and remove references
+   */
+  return { success: false, message: "not implemented" };
+};
 
+/**
+ * To delete a sub level and all corresponding sub levels under it
+ * @param {string} root_sub_level_id The root Sublevel ID
+ * @returns {string[]} The Sublevel IDs that have been deleted
+ */
 exports.deleteSubLevelTreeFromRoot = async (root_sub_level_id) => {
   let sub_level_ids = [];
   let temp_sub_level_ids = [root_sub_level_id];