cart.js

[KA2010]

const CART = require('mongoose').model('Cart'); const BOOK = require('mongoose').model('Book'); const USER = require('mongoose').model('User');

module.exports = { getCartSize: (req, res) => { let userId = req.user.id; CART.findOne({ user: userId }).then((cart) => { res.status(200).json({ message: '', data: cart.books.length }); }); },

getCart: (req, res) => {
    let userId = req.user.id;

    CART.findOne({ user: userId })
        .populate('books')
        .then((cart) => {
            res.status(200).json({
                message: '',
                data: cart
            });
        });
},

addToCart: (req, res) => {
    let userId = req.user.id;
    let bookId = req.params.bookId;

    BOOK.findById(bookId).then((book) => {
        if (!book) {
            return res.status(400).json({
                message: 'There is no book with the given id in our database.'
            });
        }

        CART.findOne({ user: userId }).then((cart) => {
            let bookIds = [];

            for (let b of cart.books) {
                bookIds.push(b.toString());
            }

            if (bookIds.indexOf(bookId) !== -1) {
                return res.status(400).json({
                    message: 'Book is already in your cart'
                });
            }

            cart.books.push(bookId);
            cart.totalPrice += book.price;
            cart.save();

            res.status(200).json({
                message: 'Book added to cart!',
                data: cart
            });
        });
    }).catch((err) => {
        console.log(err);
        return res.status(400).json({
            message: 'Something went wrong, please try again.'
        });
    });
},

removeFromCart: (req, res) => {
    let userId = req.user.id;
    let bookId = req.params.bookId;

    BOOK.findById(bookId).then((book) => {
        if (!book) {
            return res.status(400).json({
                message: 'There is no book with the given id in our database.'
            });
        }

        CART.findOne({ user: userId }).then((cart) => {
            cart.books = cart.books
                .map(b => b.toString())
                .filter(b => b !== bookId);
            cart.totalPrice -= book.price;
            cart.save();

            res.status(200).json({
                message: 'Book removed from cart!',
                data: cart
            });
        });
    }).catch((err) => {
        console.log(err);
        return res.status(400).json({
            message: 'Something went wrong, please try again.'
        });
    });
},

checkout: (req, res) => {
    let userId = req.user.id;
    let totalPrice = 0;
    let products = [];

    CART
        .findOne({ user: userId })
        .populate('books')
        .then((cart) => {
            for (let book of cart.books) {
                totalPrice += book.price * req.body[book._id.toString()];
                products.push({
                    id: book._id,
                    title: book.title,
                    author: book.author,
                    cover: book.cover,
                    price: book.price,
                    qty: req.body[book._id.toString()]
                });
            }

            RECEIPT.create({
                user: userId,
                productsInfo: products,
                totalPrice: totalPrice
            }).then((receipt) => {
                USER.update({ _id: userId }, { $push: { receipts: receipt._id } }).then(() => {
                    cart.books = [];
                    cart.totalPrice = 0;
                    cart.save();
                    return res.status(200).json({
                        message: 'Thank you for your order! Books will be sent to you as soon as possible!',
                        data: receipt
                    });
                });
            }).catch((err) => {
                console.log(err);
                return res.status(400).json({
                    message: 'Something went wrong, please try again.'
                });
            });
        });
}

};