Initial Version

server/middlewares/user_actions/auth.js

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+const jwt = require('jsonwebtoken');
+const User = require('../../models/userModel');
+const ErrorHandler = require('../../utils/errorHandler');
+const asyncErrorHandler = require('../helpers/asyncErrorHandler');
+
+exports.isAuthenticatedUser = asyncErrorHandler(async (req, res, next) => {
+
+    const { token } = req.cookies;
+
+    if (!token) {
+        return next(new ErrorHandler("Please Login to Access", 401))
+    }
+
+    const decodedData = jwt.verify(token, process.env.JWT_SECRET);
+    req.user = await User.findById(decodedData.id);
+    next();
+});
+
+exports.authorizeRoles = (...roles) => {
+    return (req, res, next) => {
+
+        if (!roles.includes(req.user.role)) {
+            return next(new ErrorHandler(`Role: ${req.user.role} is not allowed`, 403));
+        }
+        next();
+    }
+}

server/middlewares/user_actions/getRatingInfo.js

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+const Review = require("../../models/Review")
+module.exports = async (product,newStar) => {
+    // const product = req.product
+    // if (!product.isVerified && product.isDeleted) {
+    //     return res.status(404).json({ error: 'Product not found' })
+    // }
+    let stars = await Review.find({ product: product._id }).select('star');
+    let fiveStars = 0, fourStars = 0, threeStars = 0, twoStars = 0, oneStars = 0;
+    stars.forEach(s => {
+        if (s.star === 5) fiveStars += 1
+        if (s.star === 4) fourStars += 1
+        if (s.star === 3) threeStars += 1
+        if (s.star === 2) twoStars += 1
+        if (s.star === 1) oneStars += 1
+    })
+    //this condition is executed during postReview and editReview
+    if (newStar === 5) fiveStars += 1
+    if (newStar === 4) fourStars += 1
+    if (newStar === 3) threeStars += 1
+    if (newStar === 2) twoStars += 1
+    if (newStar === 1) oneStars += 1
+
+
+    let totalRatingUsers = (fiveStars + fourStars + threeStars + twoStars + oneStars)
+    let averageStar = (5 * fiveStars + 4 * fourStars + 3 * threeStars + 2 * twoStars + oneStars) / totalRatingUsers
+
+    return stars = {
+        fiveStars,
+        fourStars,
+        threeStars,
+        twoStars,
+        oneStars,
+        averageStar,
+        totalRatingUsers
+    }
+}

server/middlewares/user_actions/userHas.js

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+const Cart = require("../../models/Cart")
+const Review = require("../../models/Review")
+const Order = require("../../models/Order")
+const Whislist = require("../../models/WishList")
+
+module.exports = async(product,user,type) =>{
+    let hasOnCart = null
+    let hasBought = null
+    let hasOnWishlist = null
+    let hasReviewed = null
+    if (user) {
+        //cart bahek aru ko lagi check gareko
+        if (type !=='carts') {
+            //has on cart?
+            hasOnCart = await Cart.findOne({ user: user._id, product: product._id, isDeleted: null })
+            if (!hasOnCart) hasOnCart = false
+        }
+
+        //wishlist bahek aru ko lagi check gareko
+        if (type !=='wishlists') {
+            // has on wishlist?
+            hasOnWishlist = await Whislist.findOne({ user: user._id, product: product._id, isDeleted: null })
+            if (!hasOnWishlist) hasOnWishlist = false
+        }
+
+        if (type==='product') {
+            //has bought?
+            hasBought = await Order.findOne({ user: user, $or: [{ 'status.currentStatus': 'complete' }, { 'status.currentStatus': 'tobereturned', 'status.currentStatus': 'return' }] })
+            hasBought ? hasBought = true : hasBought = false
+            
+            //has reviewed?
+            hasReviewed = await Review.findOne({ user: user, product: product._id }).select('comment star user')
+            if (!hasReviewed) hasReviewed = false
+        }
+    }
+    
+    return {hasBought,hasOnCart,hasOnWishlist,hasReviewed}
+}