expressCart/routes/payments/paypal.js

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let express = require('express');
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let common = require('../common');
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let paypal = require('paypal-rest-sdk');
let router = express.Router();
router.get('/checkout_cancel', (req, res, next) => {
// return to checkout for adjustment or repayment
res.redirect('/checkout');
});
router.get('/checkout_return', (req, res, next) => {
let db = req.app.db;
let config = common.getConfig();
let paymentId = req.session.paymentId;
let payerId = req.query['PayerID'];
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let details = {'payer_id': payerId};
paypal.payment.execute(paymentId, details, (error, payment) => {
let paymentApproved = false;
let paymentMessage = '';
let paymentDetails = '';
if(error){
paymentApproved = false;
if(error.response.name === 'PAYMENT_ALREADY_DONE'){
paymentApproved = false;
paymentMessage = error.response.message;
}else{
paymentApproved = false;
paymentDetails = error.response.error_description;
}
// set the error
req.session.messageType = 'danger';
req.session.message = error.response.error_description;
req.session.paymentApproved = paymentApproved;
req.session.paymentDetails = paymentDetails;
res.redirect('/payment/' + req.session.orderId);
return;
}
let paymentOrderId = req.session.orderId;
let paymentStatus = 'Approved';
// fully approved
if(payment.state === 'approved'){
paymentApproved = true;
paymentStatus = 'Paid';
paymentMessage = 'Your payment was successfully completed';
paymentDetails = '<p><strong>Order ID: </strong>' + paymentOrderId + '</p><p><strong>Transaction ID: </strong>' + payment.id + '</p>';
// clear the cart
if(req.session.cart){
req.session.cart = null;
req.session.orderId = null;
req.session.totalCartAmount = 0;
}
}
// failed
if(payment.failureReason){
paymentApproved = false;
paymentMessage = 'Your payment failed - ' + payment.failureReason;
paymentStatus = 'Declined';
}
// update the order status
db.orders.update({_id: common.getId(paymentOrderId)}, {$set: {orderStatus: paymentStatus}}, {multi: false}, (err, numReplaced) => {
if(err){
console.info(err.stack);
}
db.orders.findOne({_id: common.getId(paymentOrderId)}, (err, order) => {
if(err){
console.info(err.stack);
}
// add to lunr index
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common.indexOrders(req.app)
.then(() => {
// set the results
req.session.messageType = 'success';
req.session.message = paymentMessage;
req.session.paymentEmailAddr = order.orderEmail;
req.session.paymentApproved = paymentApproved;
req.session.paymentDetails = paymentDetails;
let paymentResults = {
message: req.session.message,
messageType: req.session.messageType,
paymentEmailAddr: req.session.paymentEmailAddr,
paymentApproved: req.session.paymentApproved,
paymentDetails: req.session.paymentDetails
};
// send the email with the response
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// TODO: Should fix this to properly handle result
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common.sendEmail(req.session.paymentEmailAddr, 'Your payment with ' + config.cartTitle, common.getEmailTemplate(paymentResults));
res.redirect('/payment/' + order._id);
});
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});
});
});
});
// The homepage of the site
router.post('/checkout_action', (req, res, next) => {
let db = req.app.db;
let config = common.getConfig();
let paypalConfig = common.getPaymentConfig();
// setup the payment object
let payment = {
'intent': 'sale',
'payer': {
'payment_method': 'paypal'
},
'redirect_urls': {
'return_url': config.baseUrl + '/paypal/checkout_return',
'cancel_url': config.baseUrl + '/paypal/checkout_cancel'
},
'transactions': [{
'amount': {
'total': req.session.totalCartAmount,
'currency': paypalConfig.paypalCurrency
},
'description': paypalConfig.paypalCartDescription
}]
};
// set the config
paypal.configure(paypalConfig);
// create payment
paypal.payment.create(payment, (error, payment) => {
if(error){
req.session.message = 'There was an error processing your payment. You have not been changed and can try again.';
req.session.messageType = 'danger';
res.redirect('/pay');
return;
}
if(payment.payer.payment_method === 'paypal'){
req.session.paymentId = payment.id;
let redirectUrl;
for(let i = 0; i < payment.links.length; i++){
let link = payment.links[i];
if(link.method === 'REDIRECT'){
redirectUrl = link.href;
}
}
// if there is no items in the cart then render a failure
if(!req.session.cart){
req.session.message = 'The are no items in your cart. Please add some items before checking out';
req.session.messageType = 'danger';
res.redirect('/');
return;
}
// new order doc
let orderDoc = {
orderPaymentId: payment.id,
orderPaymentGateway: 'Paypal',
orderTotal: req.session.totalCartAmount,
orderEmail: req.body.shipEmail,
orderFirstname: req.body.shipFirstname,
orderLastname: req.body.shipLastname,
orderAddr1: req.body.shipAddr1,
orderAddr2: req.body.shipAddr2,
orderCountry: req.body.shipCountry,
orderState: req.body.shipState,
orderPostcode: req.body.shipPostcode,
orderPhoneNumber: req.body.shipPhoneNumber,
orderStatus: payment.state,
orderDate: new Date(),
orderProducts: req.session.cart
};
if(req.session.orderId){
// we have an order ID (probably from a failed/cancelled payment previosuly) so lets use that.
// send the order to Paypal
res.redirect(redirectUrl);
}else{
// no order ID so we create a new one
db.orders.insert(orderDoc, (err, newDoc) => {
if(err){
console.info(err.stack);
}
// get the new ID
let newId = newDoc.insertedIds['0'];
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// set the order ID in the session
req.session.orderId = newId;
// send the order to Paypal
res.redirect(redirectUrl);
});
}
}
});
});
module.exports = router;