Update to the lastmodified-tracking sample.
/**
 * Copyright 2015 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
'use strict';

var Firebase = require('firebase');
var env = require('./env');
var ref = new Firebase(env.get('firebase.database.url'), 'admin');
ref.auth(env.get('firebase.database.token'));

exports.touch = function(context) {
  console.log('Authenticated successfully with admin rights');
  ref.child('lastmodified').set(Firebase.ServerValue.TIMESTAMP, context.done);
};
/**
 * Copyright 2015 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
'use strict';

var Firebase = require('firebase');
var env = require('./env');
var ref = new Firebase(env.get('firebase.database.url'));

function touch(context) {
  ref.auth(env.get('firebase.database.token'), function(error) {
    if (error) {
      context.done(error);
    } else {
      console.log('Authenticated successfully with admin rights');
      ref.child('lastmodified').set(Firebase.ServerValue.TIMESTAMP);
      context.done();
    }
  });
}

module.exports = {
  touch: touch
}