facebook integration

config.default.js

@@ -21,6 +21,10 @@ var config = {
 	"google": {
 		"id": '',
 		"secret": ''
+	},
+	"facebook": {
+		"app_id": '',
+		"secret": ''
 	}
 }
 

package.json

@@ -22,6 +22,7 @@
       "passport-local": "0.1.6",
       "passport-twitter": "0.1.4",
       "passport-google-oauth": "0.1.5",
+      "passport-facebook": "0.1.5",
       "less-middleware": "0.1.11"
     },
   "devDependencies": {},

public/templates/login.tpl

@@ -17,6 +17,7 @@
 		<ul class="alt-logins">
 			<li data-url="/auth/twitter" class="twitter {twitter:display}"></li>
 			<li data-url="/auth/google" class="google {google:display}"></li>
+			<li data-url="/auth/facebook" class="facebook {facebook:display}">Login via Facebook</li>
 		</ul>
 	</div>
 </div>

src/user.js

@@ -174,6 +174,31 @@ var	config = require('../config.js'),
 		});
 	}
 
+	User.loginViaFacebook = function(fbid, name, email, callback) {
+		User.get_uid_by_fbid(fbid, function(uid) {
+			if (uid !== null) {
+				// Existing User
+				callback(null, {
+					uid: uid
+				});
+			} else {
+				// New User
+				User.create(name, null, email, function(err, uid) {
+					if (err !== null) {
+						callback(err);
+					} else {
+						// Save twitter-specific information to the user
+						RDB.set('uid:' + uid + ':fbid', fbid);
+						RDB.set('fbid:' + fbid + ':uid', uid);
+						callback(null, {
+							uid: uid
+						});
+					}
+				});
+			}
+		});
+	}
+
 	User.logout = function(sessionID, callback) {
 		User.get_uid_by_session(sessionID, function(uid) {
 			if (uid) {
@@ -257,6 +282,12 @@ var	config = require('../config.js'),
 		});	
 	}
 
+	User.get_uid_by_fbid = function(fbid, callback) {
+		RDB.get('fbid:' + fbid + ':uid', function(uid) {
+			callback(uid);
+		});	
+	}
+
 	User.session_ping = function(sessionID, uid) {
 		// Start, replace, or extend a session
 		RDB.get('sess:' + sessionID, function(session) {

src/webserver.js

@@ -10,6 +10,7 @@ var express = require('express'),
 	passportLocal = require('passport-local').Strategy,
 	passportTwitter = require('passport-twitter').Strategy,
 	passportGoogle = require('passport-google-oauth').OAuth2Strategy,
+	passportFacebook = require('passport-facebook').Strategy,
 	login_strategies = [];
 
 passport.use(new passportLocal(function(user, password, next) {
@@ -34,7 +35,7 @@ if (config.twitter && config.twitter.key && config.twitter.key.length > 0 && con
 	login_strategies.push('twitter');
 }
 
-if (config.google.id.length > 0 && config.google.secret.length > 0) {
+if (config.google && config.google.id.length > 0 && config.google.secret.length > 0) {
 	passport.use(new passportGoogle({
 		clientID: config.google.id,
 		clientSecret: config.google.secret,
@@ -44,11 +45,26 @@ if (config.google.id.length > 0 && config.google.secret.length > 0) {
 			if (err) { return done(err); }
 			done(null, user);
 		});
-	}))
+	}));
 
 	login_strategies.push('google');
 }
 
+if (config.facebook && config.facebook.app_id.length > 0 && config.facebook.secret.length > 0) {
+	passport.use(new passportFacebook({
+		clientID: config.facebook.app_id,
+		clientSecret: config.facebook.secret,
+		callbackURL: config.url + 'auth/facebook/callback'
+	}, function(accessToken, refreshToken, profile, done) {
+		global.modules.user.loginViaFacebook(profile.id, profile.displayName, profile.emails[0].value, function(err, user) {
+			if (err) { return done(err); }
+			done(null, user);
+		});
+	}));
+
+	login_strategies.push('facebook');
+}
+
 passport.serializeUser(function(user, done) {
 	done(null, user.uid);
 });
@@ -207,6 +223,15 @@ passport.deserializeUser(function(uid, done) {
 		}));
 	}
 
+	if (login_strategies.indexOf('facebook') !== -1) {
+		app.get('/auth/facebook', passport.authenticate('facebook', { scope: 'email' }));
+
+		app.get('/auth/facebook/callback', passport.authenticate('facebook', {
+			successRedirect: '/',
+			failureRedirect: '/login'
+		}));
+	}
+
 	app.get('/reset/:code', function(req, res) {
 		res.send(templates['header'] + templates['reset_code'].parse({ reset_code: req.params.code }) + templates['footer']);
 	});