discourse/app/assets/javascripts/admin/views/admin_dashboard_view.js

/**
  The default view in the admin section

  @class AdminDashboardView
  @extends Em.View
  @namespace Discourse
  @module Discourse
**/
Discourse.AdminDashboardView = Discourse.View.extend({
  templateName: 'admin/templates/dashboard',

  updateIconClasses: function() {
    var classes;
    classes = "icon icon-warning-sign ";
    if (this.get('controller.versionCheck.critical_updates')) {
      classes += "critical-updates-available";
    } else {
      classes += "updates-available";
    }
    return classes;
  }.property('controller.versionCheck.critical_updates'),

  priorityClass: function() {
    if (this.get('controller.versionCheck.critical_updates')) {
      return 'version-check critical';
    }
    return 'version-check normal';
  }.property('controller.versionCheck.critical_updates')
});