Add support of google signin

lib/auth.js

@@ -6,6 +6,7 @@ var TwitterStrategy = require('passport-twitter').Strategy;
 var GithubStrategy = require('passport-github').Strategy;
 var GitlabStrategy = require('passport-gitlab2').Strategy;
 var DropboxStrategy = require('passport-dropbox-oauth2').Strategy;
+var GoogleStrategy = require('passport-google-oauth20').Strategy;
 
 //core
 var config = require('./config.js');
@@ -100,4 +101,12 @@ if (config.dropbox) {
         clientSecret: config.dropbox.clientSecret,
         callbackURL: config.serverurl + '/auth/dropbox/callback'
     }, callback));
+}
+//google
+if (config.google) {
+    passport.use(new GoogleStrategy({
+        clientID: config.google.clientID,
+        clientSecret: config.google.clientSecret,
+        callbackURL: config.serverurl + '/auth/google/callback'
+    }, callback));
 }

lib/config.js

@@ -61,6 +61,7 @@ var twitter = config.twitter || false;
 var github = config.github || false;
 var gitlab = config.gitlab || false;
 var dropbox = config.dropbox || false;
+var google = config.google || false;
 var imgur = config.imgur || false;
 
 function getserverurl() {
@@ -113,5 +114,6 @@ module.exports = {
     github: github,
     gitlab: gitlab,
     dropbox: dropbox,
+    google: google,
     imgur: imgur
 };

lib/models/user.js

@@ -76,6 +76,9 @@ module.exports = function (sequelize, DataTypes) {
                         //no image api provided, use gravatar
                         photo = 'https://www.gravatar.com/avatar/' + md5(profile.emails[0].value);
                         break;
+                    case "google":
+                        photo = profile.photos[0].value.replace(/(\?sz=)\d*$/i, '$196');
+                        break;
                 }
                 return photo;
             }

lib/response.js

@@ -96,7 +96,8 @@ function showIndex(req, res, next) {
         twitter: config.twitter,
         github: config.github,
         gitlab: config.gitlab,
-        dropbox: config.dropbox
+        dropbox: config.dropbox,
+        google: config.google
     });
     res.write(content);
     res.end();
@@ -127,7 +128,8 @@ function responseHackMD(res, note) {
         twitter: config.twitter,
         github: config.github,
         gitlab: config.gitlab,
-        dropbox: config.dropbox
+        dropbox: config.dropbox,
+        google: config.google
     });
     var buf = html;
     res.writeHead(200, {