ambari/ambari-web/app/controllers/wizard/step1_controller.js

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

var App = require('app');

App.WizardStep1Controller = Em.Controller.extend({
  name: 'wizardStep1Controller',

  hasSubmitted : false,

  loadStep: function () {
    this.set('hasSubmitted',false);
  },

  invalidClusterName : function(){
    if(!this.get('hasSubmitted')){
      this.set('clusterNameError', '');
      return false;
    }

    var clusterName = this.get('content.cluster.name');
    if (clusterName == '') {
      this.set('clusterNameError', Em.I18n.t('installer.step1.clusterName.error.required'));
      return true;
    } else if (/\s/.test(clusterName)) {
      this.set('clusterNameError', Em.I18n.t('installer.step1.clusterName.error.whitespaces'));
      return true;
    } else if (/[^\w\s]/gi.test(clusterName)) {
      this.set('clusterNameError', Em.I18n.t('installer.step1.clusterName.error.specialChar'));
      return true;
    } else {
      this.set('clusterNameError', '');
      return false;
    }
  }.property('hasSubmitted', 'content.cluster.name').cacheable(),

  /**
   * calculates by <code>invalidClusterName</code> property
   */
  clusterNameError: '',

  /**
   * Onclick handler for <code>next</code> button
   */
  submit: function () {
    this.set('hasSubmitted', true);
    if (!this.get('invalidClusterName')) {
      this.set('content.cluster.status', 'PENDING');
      this.set('content.cluster.isCompleted', false);
      App.router.send('next');
    }
  }

});