passportGoogleStrategy.js

var passport = require('passport');
var GoogleStrategy = require('passport-google-oauth20').Strategy;

var User = require('@models/user');
var config = require('@config');

passport.use(new GoogleStrategy({
  clientID: config.googleClientId,
  clientSecret: config.googleClientSecret,
  callbackURL: config.googleCallbackUrl,
  scope: ['profile', 'email'],
  passReqToCallback: true,
  state: true,
  },
  function(req, accessToken, refreshToken, profile, done) {
    try {
      var searchQuery = {
        name: profile.displayName
      };
  
      // update the user if s/he exists or add a new user
      User.findOne(searchQuery, function(err, user) {
        if(err) {
          console.log('[google] err: ', err);
          return done(err);
        } else if (user !== null) {
          console.log('google user already there');
          return done(null, user);
        }
        console.log("user not present, creating one...");
        user = new User({
          name: profile.displayName,
          email: profile['_json']['email'],
          profileId: profile.id,
          google: {
            accessToken,
            profileId: profile.id,
            email: profile['_json']['email']
          }
        });
        user.save(function(err) {
          if(err) {
            console.log('err occurred while saving google user: ', err);
            console.log(err);  // handle errors!
          } else {
            console.log("saving user ...");
          }
        });
      });
    } catch (verifyErr) {
      done(verifyErr);
    }
  }

));


module.exports = passport;