freeCodeCamp/server/server.js

require('dotenv').load();
var pmx = require('pmx');
pmx.init();

var assign = require('lodash').assign,
  loopback = require('loopback'),
  boot = require('loopback-boot'),
  expressState = require('express-state'),
  path = require('path'),
  passportProviders = require('./passport-providers');

var generateKey =
  require('loopback-component-passport/lib/models/utils').generateKey;
/**
 * Create Express server.
 */
var app = loopback();

expressState.extend(app);
app.set('state namespace', '__fcc__');

var PassportConfigurator =
  require('loopback-component-passport').PassportConfigurator;
var passportConfigurator = new PassportConfigurator(app);

app.set('port', process.env.PORT || 3000);
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');
app.disable('x-powered-by');

// adds passport initialization after session middleware phase is complete
passportConfigurator.init();

boot(app, {
  appRootDir: __dirname,
  dev: process.env.NODE_ENV
});


passportConfigurator.setupModels({
  userModel: app.models.user,
  userIdentityModel: app.models.userIdentity,
  userCredentialModel: app.models.userCredential
});

var passportOptions = {
  emailOptional: true,
  profileToUser: function(provider, profile) {
    var emails = profile.emails;
    // NOTE(berks): get email or set to null.
    // MongoDB indexs email but can be sparse(blank)
    var email = emails && emails[0] && emails[0].value ?
      emails[0].value :
      null;

    var username = (profile.username || profile.id);
    username = typeof username === 'string' ? username.toLowerCase() :
      username;
    var password = generateKey('password');
    var userObj = {
      username: username,
      password: password
    };

    if (email) {
      userObj.email = email;
    }
    return userObj;
  }
};

Object.keys(passportProviders).map(function(strategy) {
  var config = passportProviders[strategy];
  config.session = config.session !== false;
  passportConfigurator.configureProvider(
    strategy,
    assign(config, passportOptions)
  );
});

app.start = function() {
  app.listen(app.get('port'), function() {
    app.emit('started');
    console.log(
      'FreeCodeCamp server listening on port %d in %s mode',
      app.get('port'),
      app.get('env')
    );
  });
};

module.exports = app;

// start the server if `$ node server.js`
// in production use `$npm start-production`
// or `$node server/production` to start the server
// and wait for DB handshake
if (require.main === module) {
  app.start();
}