Firebase authentication provider is implemented

package.json

@@ -23,6 +23,7 @@
     "commander": "2.9.0",
     "deepcopy": "0.6.3",
     "express": "4.14.0",
+    "firebase-admin": "^4.0.3",
     "intersect": "1.0.1",
     "lodash": "4.17.2",
     "lru-cache": "4.0.2",

src/authDataManager/firebase.js

@@ -0,0 +1,41 @@
+// Helper functions for accessing the qq Graph API.
+var Parse = require('parse/node').Parse;
+var admin = require("firebase-admin");
+
+
+var firebaseServiceAccount = process.env.FIREBASE_SERVICE_ACCOUNT;
+if (firebaseServiceAccount != null) {
+  admin.initializeApp({
+    credential: admin.credential.cert(require(firebaseServiceAccount))
+  });
+}
+
+
+// Returns a promise that fulfills iff this user id is valid.
+function validateAuthData(authData) {
+  if (firebaseServiceAccount == null || firebaseServiceAccount == "") {
+    throw new Parse.Error(Parse.Error.FILE_READ_ERROR, "Firebase service account file not exists");
+  }
+
+  return admin.auth().verifyIdToken(authData.access_token)
+      .then(function (decodedToken) {
+        if (decodedToken == null || decodedToken.uid == null || decodedToken.uid == "") {
+          throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, "Firebase user not found");
+        }
+        return;
+      }).catch(function (error) {
+        throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, error.message);
+      });
+
+}
+
+// Returns a promise that fulfills if this app id is valid.
+function validateAppId() {
+  return Promise.resolve();
+}
+
+
+module.exports = {
+  validateAppId,
+  validateAuthData
+};

src/authDataManager/index.js

@@ -13,6 +13,8 @@ let vkontakte = require("./vkontakte");
 let qq = require("./qq");
 let wechat = require("./wechat");
 let weibo = require("./weibo");
+let firebase = require("./firebase");
+
 
 let anonymous = {
   validateAuthData: () => {
@@ -39,7 +41,8 @@ let providers = {
   vkontakte,
   qq,
   wechat,
-  weibo
+  weibo,
+  firebase
 }
 
 module.exports = function(oauthOptions = {}, enableAnonymousUsers = true) {