getGroup.js

const express = require("express");
const router = express.Router();
const Ad = require("../models/Ad");

// Route        POST api/getgroup
// Description  Search all ads with criteria
// Access       Public
router.post("/", async (req, res) => {
  const type = req.body.type;
  console.log("type", type);
  try {
    let result;
    switch (type) {
      case "popular":
        result = await Ad.find({})
          .sort({
            seenCount: 1,
          })
          .limit(15);
      case "new":
        result = await Ad.find({ mileage: { $lte: 500 } })
          .sort({
            mileage: -1,
          })
          .limit(15);
      case "expensive":
        result = await Ad.find({})
          .sort({
            price: -1,
          })
          .limit(15);
      default:
        result = await Ad.find({ featured: true })
          .sort({
            date: -1,
          })
          .limit(15);
    }

    res.json(result);
  } catch (error) {
    console.error(error.message);
    res.status(500).json("Server error");
  }
});

module.exports = router;