Add linkedin support for login

app/models/user.js

@@ -23,7 +23,8 @@ var UserSchema = new Schema({
     facebook: {},
     twitter: {},
     github: {},
-    google: {}
+    google: {},
+    linkedin: {}
 });
 
 /**

app/routes/users.js

@@ -63,4 +63,14 @@ module.exports = function(app, passport) {
         failureRedirect: '/signin'
     }), users.authCallback);
 
+    // Setting the linkedin oauth routes
+    app.get('/auth/linkedin', passport.authenticate('linkedin', {
+        failureRedirect: '/signin',
+        scope: [ 'r_emailaddress' ]
+    }), users.signin);
+
+    app.get('/auth/linkedin/callback', passport.authenticate('linkedin', {
+        failureRedirect: '/siginin'
+    }), users.authCallback);
+
 };

app/views/users/auth.jade

@@ -11,6 +11,8 @@ block content
         img(src="/img/icons/twitter.png")
       a(href="/auth/google")
         img(src="/img/icons/google.png")
+      a(href="/auth/linkedin")
+        img(src="/img/icons/linkedin.png")
     .col-md-6
       if message && message.length
         .fade.in.alert.alert-error

config/env/development.js

@@ -24,5 +24,10 @@ module.exports = {
         clientID: "APP_ID",
         clientSecret: "APP_SECRET",
         callbackURL: "http://localhost:3000/auth/google/callback"
+    },
+    linkedin: {
+        clientID: "API_KEY",
+        clientSecret: "SECRET_KEY",
+        callbackURL: "http://localhost:3000/auth/linkedin/callback"
     }
 }

config/env/production.js

@@ -24,5 +24,10 @@ module.exports = {
         clientID: "APP_ID",
         clientSecret: "APP_SECRET",
         callbackURL: "http://localhost:3000/auth/google/callback"
+    },
+    linkedin: {
+        clientID: "API_KEY",
+        clientSecret: "SECRET_KEY",
+        callbackURL: "http://localhost:3000/auth/linkedin/callback"
     }
 }

config/passport.js

@@ -6,6 +6,7 @@ var mongoose = require('mongoose'),
     FacebookStrategy = require('passport-facebook').Strategy,
     GitHubStrategy = require('passport-github').Strategy,
     GoogleStrategy = require('passport-google-oauth').OAuth2Strategy,
+    LinkedinStrategy = require('passport-linkedin').Strategy,
     User = mongoose.model('User'),
     config = require('./config');
 
@@ -174,4 +175,33 @@ module.exports = function(passport) {
             });
         }
     ));
+
+    // use linkedin strategy
+    passport.use(new LinkedinStrategy({
+            consumerKey: config.linkedin.clientID,
+            consumerSecret: config.linkedin.clientSecret,
+            callbackURL: config.linkedin.callbackURL,
+            profileFields: ['id', 'first-name', 'last-name', 'email-address']
+        },
+        function(accessToken, refreshToken, profile, done) {
+          User.findOne({ 
+                'linkedin.id': profile.id 
+            }, function (err, user) {
+                if (!user) {
+                    user = new User({
+                        name: profile.displayName,
+                        email: profile.emails[0].value,
+                        username: profile.emails[0].value,
+                        provider: 'linkedin'
+                    });
+                    user.save(function (err) {
+                        if (err) console.log(err);
+                        return done(err, user);
+                    });
+                } else {
+                    return done(err, user)
+                }
+            });
+        }
+    ));
 };