Merge pull request #4 from omodauda/facebook_oauth

implemented user auth using google & facebook oauth

Controllers/auth.js

@@ -24,7 +24,8 @@ module.exports = {
     // Check if there is a user with the same email
     const foundUser = await User.findOne({ "local.email": email });
     const existingUser = await User.findOne({"google.email": email});
-    if (foundUser || existingUser) { 
+    const facebookUser = await User.findOne({"facebook.email": email});
+    if (foundUser || existingUser || facebookUser) { 
       return res.status(403).json({ error: 'Email is already in use'});
     } 
 
@@ -61,9 +62,16 @@ module.exports = {
 
   googleOAuth: async (req, res, next) => {
     // Generate token
-    console.log('got here');
+    // console.log('got here');
     const token = signToken(req.user);
     res.status(200).json({ token });
   },
 
+  facebookOAuth: async (req, res, next) => {
+    // console.log('got here');
+    // console.log('req.user', req.user);
+    const token = signToken(req.user);
+    res.status(200).json({ token });
+  }
+
 }

Routes/authRoute.js

@@ -17,5 +17,7 @@ router.route('/signin')
 router.route('/oauth/google')
   .post(passport.authenticate('googleToken', { session: false }), UsersController.googleOAuth);
 
+router.route('/oauth/facebook')
+  .post(passport.authenticate('facebookToken', { session: false}), UsersController.facebookOAuth);
 
 module.exports = router;

package.json

@@ -31,6 +31,7 @@
     "mongoose": "^5.9.19",
     "multer": "^1.4.2",
     "passport": "^0.4.1",
+    "passport-facebook-token": "^4.0.0",
     "passport-google-plus-token": "^2.1.0",
     "passport-jwt": "^4.0.0",
     "passport-local": "^1.0.0",

passport.js

@@ -4,6 +4,7 @@ const JwtStrategy = require('passport-jwt').Strategy;
 const { ExtractJwt } = require('passport-jwt');
 const LocalStrategy = require('passport-local').Strategy;
 const GooglePlusTokenStrategy = require('passport-google-plus-token');
+const FacebookTokenStrategy = require('passport-facebook-token');
 const User = require('./Models/authModel');
 
 // JSON WEB TOKENS STRATEGY
@@ -58,6 +59,37 @@ passport.use('googleToken', new GooglePlusTokenStrategy({
   }
 }));
 
+//FACEBOOK OAUTH STRATEGY
+passport.use('facebookToken', new FacebookTokenStrategy({
+  clientID: process.env.FACEBOOK_APP_ID,
+  clientSecret: process.env.FACEBOOK_APP_SECRET
+}, async (accessToken, refreshToken, profile, done) => {
+  try{
+    console.log('profile', profile);
+    console.log('accessToken', accessToken);
+    console.log('refreshToken', refreshToken);
+
+    const existingUser = await User.findOne({ "facebook.id": profile.id });
+    if (existingUser) {
+      return done(null, existingUser);
+    }
+
+    const newUser = new User({
+      method: 'facebook',
+      facebook: {
+        id: profile.id,
+        email: profile.emails[0].value
+      }
+    });
+
+    await newUser.save();
+    done(null, newUser)
+  } catch(error) {
+    done(error, false, error.message);
+  }
+}));
+
+
 // LOCAL STRATEGY
 passport.use(new LocalStrategy({
   usernameField: 'email'