discourse/app/assets/javascripts/admin/controllers/admin_site_settings_controller.js

/**
  This controller supports the interface for SiteSettings.

  @class AdminSiteSettingsController
  @extends Ember.ArrayController
  @namespace Discourse
  @module Discourse
**/
Discourse.AdminSiteSettingsController = Ember.ArrayController.extend(Discourse.Presence, {
  filter: null,
  onlyOverridden: false,

  /**
    The list of settings based on the current filters

    @property filteredContent
  **/
  filteredContent: (function() {

    // If we have no content, don't bother filtering anything
    if (!this.present('content')) return null;

    var filter;
    if (this.get('filter')) {
      filter = this.get('filter').toLowerCase();
    }

    var adminSettingsController = this;
    return this.get('content').filter(function(item, index, enumerable) {
      if (adminSettingsController.get('onlyOverridden') && !item.get('overridden')) return false;
      if (filter) {
        if (item.get('setting').toLowerCase().indexOf(filter) > -1) return true;
        if (item.get('description').toLowerCase().indexOf(filter) > -1) return true;
        if (item.get('value').toLowerCase().indexOf(filter) > -1) return true;
        return false;
      }

      return true;
    });
  }).property('filter', 'content.@each', 'onlyOverridden'),

  /**
    Reset a setting to its default value

    @method resetDefault
    @param {Discourse.SiteSetting} setting The setting we want to revert
  **/
  resetDefault: function(setting) {
    setting.set('value', setting.get('default'));
    setting.save();
  },

  /**
    Save changes to a site setting

    @method save
    @param {Discourse.SiteSetting} setting The setting we've changed
  **/
  save: function(setting) {
    setting.save();
  },

  /**
    Cancel changes to a site setting

    @method cancel
    @param {Discourse.SiteSetting} setting The setting we've changed but want to revert
  **/
  cancel: function(setting) {
    setting.resetValue();
  }

});