Building OAuth Strategies with passport.js Chapter 7module.exports.controller = (app) => {
// linkedin strategy
passport.use(new Strategy({
consumerKey: config.LINKEDIN_APP_ID,
consumerSecret: config.LINKEDIN_APP_SECRET,
callbackURL: '/login/linkedin/return',
profileFields: ['id', 'first-name', 'last-name', 'email-address'],
},
(accessToken, refreshToken, profile, cb) => {
const email = profile.emails[0].value;
User.getUserByEmail(email, (err, user) => {
if (!user) {
const newUser = new User({
fullname: profile.displayName,
email: profile.emails[0].value,
facebookId: profile.id,
});
User.createUser(newUser, (error) => {
if (error) {
// Handle error
}
return cb(null, user);
});
} else {
return cb(null, user);
}
return true;
});
}));app.get('/login/linkedin',
passport.authenticate('linkedin'));app.get('/login/linkedin/return',
passport.authenticate('linkedin', { failureRedirect: '/login' }),
(req, res) => {
res.redirect('/');
});
};With this, everything is ready to go for the LinkedIn login. We should be able to log in
successfully with the LOGIN WITH LINKEDIN button now.