expressCart/app.js

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const express = require('express');
const path = require('path');
const logger = require('morgan');
const cookieParser = require('cookie-parser');
const bodyParser = require('body-parser');
const session = require('express-session');
const moment = require('moment');
const _ = require('lodash');
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const MongoStore = require('connect-mongodb-session')(session);
const numeral = require('numeral');
const helmet = require('helmet');
const colors = require('colors');
const cron = require('node-cron');
const common = require('./lib/common');
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const { runIndexing } = require('./lib/indexing');
const { addSchemas } = require('./lib/schema');
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const { initDb } = require('./lib/db');
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let handlebars = require('express-handlebars');
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// Validate our settings schema
const Ajv = require('ajv');
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const ajv = new Ajv({ useDefaults: true });
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// get config
let config = common.getConfig();
const baseConfig = ajv.validate(require('./config/baseSchema'), config);
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if(baseConfig === false){
console.log(colors.red(`settings.json incorrect: ${ajv.errorsText()}`));
process.exit(2);
}
// Validate the payment gateway config
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switch(config.paymentGateway){
case'paypal':
const paypalConfig = ajv.validate(require('./config/paypalSchema'), require('./config/paypal.json'));
if(paypalConfig === false){
console.log(colors.red(`PayPal config is incorrect: ${ajv.errorsText()}`));
process.exit(2);
}
break;
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case'stripe':
const stripeConfig = ajv.validate(require('./config/stripeSchema'), require('./config/stripe.json'));
if(stripeConfig === false){
console.log(colors.red(`Stripe config is incorrect: ${ajv.errorsText()}`));
process.exit(2);
}
break;
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case'authorizenet':
const authorizenetConfig = ajv.validate(require('./config/authorizenetSchema'), require('./config/authorizenet.json'));
if(authorizenetConfig === false){
console.log(colors.red(`Authorizenet config is incorrect: ${ajv.errorsText()}`));
process.exit(2);
}
break;
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}
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// require the routes
const index = require('./routes/index');
const admin = require('./routes/admin');
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const product = require('./routes/product');
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const customer = require('./routes/customer');
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const order = require('./routes/order');
const user = require('./routes/user');
const paypal = require('./routes/payments/paypal');
const stripe = require('./routes/payments/stripe');
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const authorizenet = require('./routes/payments/authorizenet');
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const app = express();
// view engine setup
app.set('views', path.join(__dirname, '/views'));
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app.engine('hbs', handlebars({
extname: 'hbs',
layoutsDir: path.join(__dirname, 'views', 'layouts'),
defaultLayout: 'layout.hbs',
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partialsDir: [path.join(__dirname, 'views')]
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}));
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app.set('view engine', 'hbs');
// helpers for the handlebar templating platform
handlebars = handlebars.create({
helpers: {
perRowClass: (numProducts) => {
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if(parseInt(numProducts) === 1){
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return'col-md-12 col-xl-12 col m12 xl12 product-item';
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}
if(parseInt(numProducts) === 2){
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return'col-md-6 col-xl-6 col m6 xl6 product-item';
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}
if(parseInt(numProducts) === 3){
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return'col-md-4 col-xl-4 col m4 xl4 product-item';
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}
if(parseInt(numProducts) === 4){
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return'col-md-3 col-xl-3 col m3 xl3 product-item';
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}
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return'col-md-6 col-xl-6 col m6 xl6 product-item';
},
menuMatch: (title, search) => {
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if(!title || !search){
return'';
}
if(title.toLowerCase().startsWith(search.toLowerCase())){
return'class="navActive"';
}
return'';
},
getTheme: (view) => {
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return`themes/${config.theme}/${view}`;
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},
formatAmount: (amt) => {
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if(amt){
return numeral(amt).format('0.00');
}
return'0.00';
},
amountNoDecimal: (amt) => {
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if(amt){
return handlebars.helpers.formatAmount(amt).replace('.', '');
}
return handlebars.helpers.formatAmount(amt);
},
getStatusColor: (status) => {
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switch(status){
case'Paid':
return'success';
case'Approved':
return'success';
case'Approved - Processing':
return'success';
case'Failed':
return'danger';
case'Completed':
return'success';
case'Shipped':
return'success';
case'Pending':
return'warning';
default:
return'danger';
}
},
checkProductOptions: (opts) => {
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if(opts){
return'true';
}
return'false';
},
currencySymbol: (value) => {
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if(typeof value === 'undefined' || value === ''){
return'$';
}
return value;
},
objectLength: (obj) => {
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if(obj){
return Object.keys(obj).length;
}
return 0;
},
stringify: (obj) => {
if(obj){
return JSON.stringify(obj);
}
return'';
},
checkedState: (state) => {
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if(state === 'true' || state === true){
return'checked';
}
return'';
},
selectState: (state, value) => {
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if(state === value){
return'selected';
}
return'';
},
isNull: (value, options) => {
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if(typeof value === 'undefined' || value === ''){
return options.fn(this);
}
return options.inverse(this);
},
toLower: (value) => {
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if(value){
return value.toLowerCase();
}
return null;
},
formatDate: (date, format) => {
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return moment(date).format(format);
},
ifCond: (v1, operator, v2, options) => {
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switch(operator){
case'==':
return(v1 === v2) ? options.fn(this) : options.inverse(this);
case'!=':
return(v1 !== v2) ? options.fn(this) : options.inverse(this);
case'===':
return(v1 === v2) ? options.fn(this) : options.inverse(this);
case'<':
return(v1 < v2) ? options.fn(this) : options.inverse(this);
case'<=':
return(v1 <= v2) ? options.fn(this) : options.inverse(this);
case'>':
return(v1 > v2) ? options.fn(this) : options.inverse(this);
case'>=':
return(v1 >= v2) ? options.fn(this) : options.inverse(this);
case'&&':
return(v1 && v2) ? options.fn(this) : options.inverse(this);
case'||':
return(v1 || v2) ? options.fn(this) : options.inverse(this);
default:
return options.inverse(this);
}
},
isAnAdmin: (value, options) => {
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if(value === 'true' || value === true){
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return options.fn(this);
}
return options.inverse(this);
}
}
});
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// session store
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const store = new MongoStore({
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uri: config.databaseConnectionString,
collection: 'sessions'
});
app.enable('trust proxy');
app.use(helmet());
app.set('port', process.env.PORT || 1111);
app.use(logger('dev'));
app.use(bodyParser.json());
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app.use(bodyParser.urlencoded({ extended: false }));
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app.use(cookieParser('5TOCyfH3HuszKGzFZntk'));
app.use(session({
resave: true,
saveUninitialized: true,
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secret: 'UPDATE_TO_RANDOM_STRING',
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cookie: {
path: '/',
httpOnly: true,
maxAge: 900000
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},
store: store
}));
// serving static content
app.use(express.static(path.join(__dirname, 'public')));
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app.use(express.static(path.join(__dirname, 'views', 'themes')));
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// Make stuff accessible to our router
app.use((req, res, next) => {
req.handlebars = handlebars;
next();
});
// update config when modified
app.use((req, res, next) => {
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if(res.configDirty){
config = common.getConfig();
app.config = config;
}
next();
});
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// Ran on all routes
app.use((req, res, next) => {
res.setHeader('Cache-Control', 'no-cache, no-store');
next();
});
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// setup the routes
app.use('/', index);
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app.use('/', customer);
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app.use('/', product);
app.use('/', order);
app.use('/', user);
app.use('/', admin);
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app.use('/paypal', paypal);
app.use('/stripe', stripe);
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app.use('/authorizenet', authorizenet);
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// catch 404 and forward to error handler
app.use((req, res, next) => {
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const err = new Error('Not Found');
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err.status = 404;
next(err);
});
// error handlers
// development error handler
// will print stacktrace
if(app.get('env') === 'development'){
app.use((err, req, res, next) => {
console.error(colors.red(err.stack));
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: err,
helpers: handlebars.helpers
});
});
}
// production error handler
// no stacktraces leaked to user
app.use((err, req, res, next) => {
console.error(colors.red(err.stack));
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: {},
helpers: handlebars.helpers
});
});
// Nodejs version check
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const nodeVersionMajor = parseInt(process.version.split('.')[0].replace('v', ''));
if(nodeVersionMajor < 7){
console.log(colors.red(`Please use Node.js version 7.x or above. Current version: ${nodeVersionMajor}`));
process.exit(2);
}
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app.on('uncaughtException', (err) => {
console.error(colors.red(err.stack));
process.exit(2);
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});
initDb(config.databaseConnectionString, async (err, db) => {
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// On connection error we display then exit
if(err){
console.log(colors.red('Error connecting to MongoDB: ' + err));
process.exit(2);
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}
// add db to app for routes
app.db = db;
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app.config = config;
app.port = app.get('port');
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// Fire up the cron job to clear temp held stock
cron.schedule('*/1 * * * *', async () => {
const validSessions = await db.sessions.find({}).toArray();
const validSessionIds = [];
_.forEach(validSessions, (value) => {
validSessionIds.push(value._id);
});
// Remove any invalid cart holds
await db.cart.remove({
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sessionId: { $nin: validSessionIds }
});
});
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// Set trackStock for testing
if(process.env.NODE_ENV === 'test'){
config.trackStock = true;
}
// Process schemas
await addSchemas();
// We index when not in test env
if(process.env.NODE_ENV !== 'test'){
try{
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await runIndexing(app);
}catch(ex){
console.error(colors.red('Error setting up indexes:' + err));
}
}
// Start the app
try{
await app.listen(app.get('port'));
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app.emit('appStarted');
console.log(colors.green('expressCart running on host: http://localhost:' + app.get('port')));
}catch(ex){
console.error(colors.red('Error starting expressCart app:' + err));
process.exit(2);
}
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});
module.exports = app;