Feature/backend/sorting projects in collection

backend/Controllers/collection.controller.js

@@ -118,6 +118,11 @@ export const deleteCollection = async(req,res)=>{
   try{
     const userID =req.user;
     const {collection_name} = req.body;
+
+    if (!collection_name) {
+      return res.status(400).json({ error: "Collection name is required" });
+    }
+
     const existingUser = await  User.findById(userID);
     if(!existingUser) return res.status(404).json("User not found");
 
@@ -133,3 +138,51 @@ export const deleteCollection = async(req,res)=>{
   }
 }
 
+//sorting by date and likes
+export const sortProject = async(req,res)=>{
+  try {
+    const userID = req.user;
+
+    if (!userID) return res.status(401).json({ message: "User not authenticated" });
+
+    const { sortBy } = req.query; //likes,newest,oldest
+
+    //for likes sorting
+    const savedProjects = await Collection.find({ userID });
+    const projectIds = savedProjects.map(p => p.project_id);
+
+    let objectIds = [];
+    let stringIds = [];
+
+    savedProjects.forEach(p => {
+      if (mongoose.Types.ObjectId.isValid(p.project_id)) objectIds.push(p.project_id);
+      else stringIds.push(p.project_id);
+    });
+
+    let query = Project.find({
+      $or: [
+        { _id: { $in: objectIds } },
+        { project_id: { $in: stringIds } }
+      ]
+    });
+
+
+    //sorting
+    if (sortBy === "likes") {
+      query = query.sort({ "activity.total_likes": -1 });
+    } else if (sortBy === "newest") {
+      query = query.sort({ createdAt: -1 });
+    } else if (sortBy === "oldest") {
+      query = query.sort({ createdAt: 1 });
+    }
+
+     const projects = await query.lean();
+
+    return res.status(200).json(projects);
+  } catch (err) {
+    console.error(err);
+    return res.status(400).json(err);
+  }
+}
+
+

backend/Routes/api/collections.routes.js

@@ -1,9 +1,12 @@
 import express from 'express';
-import { createNewCollection, deleteCollection, deleteProject, saveProject} from '../../Controllers/collection.controller.js';
+import { createNewCollection, deleteCollection, deleteProject, saveProject, sortProject} from '../../Controllers/collection.controller.js';
 import { authenticateUser } from '../../Middlewares/auth.middleware.js';
 const collectionRoutes = express.Router();
 collectionRoutes.post("/create-collection", authenticateUser, createNewCollection);
 collectionRoutes.post("/:id",  authenticateUser, saveProject);
+collectionRoutes.get("/sorted-project", authenticateUser, sortProject);
+collectionRoutes.delete("/saved-projects", authenticateUser, deleteProject);
+collectionRoutes.delete("/", authenticateUser, deleteCollection);
 collectionRoutes.delete("/saved-projects", authenticateUser, deleteProject);
 collectionRoutes.delete("/", authenticateUser, deleteCollection);
 

backend/package.json

@@ -43,6 +43,4 @@
   },
   "description": ""
 
-  }
-
 }