/
index.js
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index.js
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const functions = require('firebase-functions');
const stripe = require('stripe')(functions.config().keys.webhooks);
const admin = require('firebase-admin');
const cors = require('cors')({ origin: true });
const axios = require('axios');
const querystring = require('querystring');
const chance = require('chance').Chance();
const PastebinAPI = require('pastebin-js');
const pastebinSecret = functions.config().keys.pastebin;
const pastebin = new PastebinAPI(pastebinSecret);
const endpointSecret = functions.config().keys.signing;
const price = functions.config().keys.price;
admin.initializeApp();
exports.checkout_sessions = functions.https.onRequest((req, res) => {
cors(req, res, async () => {
if (req.method === 'POST') {
try {
// Create Checkout Sessions from body params.
const session = await stripe.checkout.sessions.create({
mode: 'payment',
payment_method_types: ['card'],
line_items: [{
price: price,
adjustable_quantity: {
enabled: true,
minimum: 1,
maximum: 99
},
quantity: 1,
}],
success_url: `${req.headers.origin}/?success=true&session_id={CHECKOUT_SESSION_ID}`,
cancel_url: `${req.headers.origin}/?canceled=true`,
});
res.redirect(303, session.url);
} catch (err) {
res.status(err.statusCode || 500).json(err.message);
}
} else {
res.setHeader('Allow', 'POST');
res.status(405).end('Method Not Allowed');
}
});
});
function generatePhoneNumber() {
return new Promise((resolve, reject) => {
const unformattedNumber = chance.phone({ formatted: false });
const formattedNumber = unformattedNumber.substr(0,3) +
'-' + unformattedNumber.substr(3,3) + '-' + unformattedNumber.substr(6);
const request = {
url: 'https://api.andpizza.com/handlers/phone-offers/gxresolve',
method: 'POST',
data: 'phone=' + formattedNumber,
headers: {
"accept": "*/*",
"accept-language": "en-US,en;q=0.9",
"cache-control": "max-age=0",
"content-type": "application/x-www-form-urlencoded",
"sec-ch-ua": "\"Google Chrome\";v=\"89\", \"Chromium\";v=\"89\", \";Not A Brand\";v=\"99\"",
"sec-ch-ua-mobile": "?0",
"sec-fetch-dest": "document",
"sec-fetch-mode": "navigate",
"sec-fetch-site": "same-site",
"sec-fetch-user": "?1",
"upgrade-insecure-requests": "1"
}
};
axios(request).catch(err => {
let res = err.response;
let params = querystring.parse(res.request.path.split("?").pop());
if (params.success === 'true') {
functions.logger.log(formattedNumber, 'worked to generate', params["offers[0]"]);
resolve(params["offers[0]"]);
} else if (params.error === 'Invalid phone number or configuration') {
functions.logger.log(formattedNumber, 'didn\'t work');
generatePhoneNumber().then(code => resolve(code));
} else {
reject(params);
}
});
});
}
function* generatePhoneNumberIterable(quantity) {
let iterationCount = 0;
for (let i = 0; i < quantity; i += 1) {
iterationCount++;
yield generatePhoneNumber();
}
return iterationCount;
}
function getOrderQuantity(event) {
return new Promise((resolve, reject) => {
stripe.checkout.sessions.listLineItems(event.data.object.id, { limit: 100 }, (err, lineItems) => {
if (err) { reject(err) }
resolve(lineItems.data[0].quantity);
});
});
}
function fulfillOrder(event, quantity, i) {
const dbCallback = e => {
if (e) {
functions.logger.error(e);
if (i < 10) {
functions.logger.warn(`Committing failed ${i + 1} times`);
fulfillOrder(event, quantity, i + 1);
} else {
functions.logger.warn(`Committing failed ${i + 1} times. Giving up.`);
}
} else {
functions.logger.log('Code saved successfully');
}
}
// Run this once every generatePhoneNumber promise resolves
Promise.all(generatePhoneNumberIterable(quantity)).then(async codes => {
functions.logger.log('Going to commit', codes, 'to orders');
// Generate a pastebin link to host the codes
if (quantity !== 1) {
pastebin.createPaste(codes.join('\n'), event.data.object.id, 'text', 1, 'N')
.then(async data => {
// Post the codes and its pastebin url
await admin.database().ref('/orders').child(event.data.object.id).set({
codes: codes,
pasteUrl: data,
created: event.created,
customerId: event.data.object.customer,
...event.data.object.customer_details
}, e => dbCallback(e));
}).fail(e => functions.logger.error(e));
} else { // Just post the one code
await admin.database().ref('/orders').child(event.data.object.id).set({
code: codes[0],
created: event.created,
customerId: event.data.object.customer,
...event.data.object.customer_details
}, e => dbCallback(e));
}
}).catch(e => functions.logger.error(e));
}
// realtime database and webhook endpoint in stripe on checkout.session.completed to associate checkout.id with the code
exports.generateCode = functions.https.onRequest((req, res) => {
// TODO: remove cors wrapper
cors(req, res, () => {
const sig = req.headers['stripe-signature'];
let event;
try {
event = stripe.webhooks.constructEvent(req.rawBody, sig, endpointSecret);
res.sendStatus(200);
} catch (err) {
return res.status(400).send(`Webhook Error: ${err.message}`);
}
switch (event.type) {
case 'checkout.session.completed': {
getOrderQuantity(event)
.then(quantity => fulfillOrder(event, quantity, 0))
.catch(e => functions.logger.error(e));
break;
}
case 'checkout.session.async_payment_succeeded': {
if (event.data.object.payment_status === 'paid') {
getOrderQuantity(event)
.then(quantity => fulfillOrder(event, quantity, 0))
.catch(e => functions.logger.error(e));
break;
}
}
}
});
});
// Get code from database to respond to polling
exports.getCode = functions.https.onRequest((req, res) => {
cors(req, res, () => {
functions.logger.log("key:", req.header('Authorization'));
admin.database().ref('orders')
.child(req.header('Authorization'))
.once('value', snapshot => {
try {
const data = snapshot.val();
if (data.hasOwnProperty('code')) {
return res.status(200).send({ code: data.code });
} else if (data.hasOwnProperty('pasteUrl')) {
return res.status(200).send({ pasteUrl: data.pasteUrl });
}
} catch (e) { functions.logger.info('1:', e) }
}).catch(e => functions.logger.info('2:', e));
});
});