1: <?php
  2: /*****************************************************************************************
  3:  * X2Engine Open Source Edition is a customer relationship management program developed by
  4:  * X2Engine, Inc. Copyright (C) 2011-2016 X2Engine Inc.
  5:  * 
  6:  * This program is free software; you can redistribute it and/or modify it under
  7:  * the terms of the GNU Affero General Public License version 3 as published by the
  8:  * Free Software Foundation with the addition of the following permission added
  9:  * to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED WORK
 10:  * IN WHICH THE COPYRIGHT IS OWNED BY X2ENGINE, X2ENGINE DISCLAIMS THE WARRANTY
 11:  * OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 12:  * 
 13:  * This program is distributed in the hope that it will be useful, but WITHOUT
 14:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 15:  * FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
 16:  * details.
 17:  * 
 18:  * You should have received a copy of the GNU Affero General Public License along with
 19:  * this program; if not, see http://www.gnu.org/licenses or write to the Free
 20:  * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 21:  * 02110-1301 USA.
 22:  * 
 23:  * You can contact X2Engine, Inc. P.O. Box 66752, Scotts Valley,
 24:  * California 95067, USA. or at email address [email protected].
 25:  * 
 26:  * The interactive user interfaces in modified source and object code versions
 27:  * of this program must display Appropriate Legal Notices, as required under
 28:  * Section 5 of the GNU Affero General Public License version 3.
 29:  * 
 30:  * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
 31:  * these Appropriate Legal Notices must retain the display of the "Powered by
 32:  * X2Engine" logo. If the display of the logo is not reasonably feasible for
 33:  * technical reasons, the Appropriate Legal Notices must display the words
 34:  * "Powered by X2Engine".
 35:  *****************************************************************************************/
 36: 
 37: /**
 38:  * Custom extension of CAssetManager used by the app.
 39:  *
 40:  * @package application.components
 41:  */
 42: class X2AssetManager extends CAssetManager {
 43: 
 44:     public static $enableAssetDomains;
 45:     private $_baseUrl;
 46:     private $_baseUri;
 47:     protected $_staticAssetUrls;
 48:     private static $_assetUrlsRRIndex;
 49: 
 50:     /**
 51:      * Blacklist of assets to skip when considering using a static asset domain
 52:      */
 53:     public static $skipAssets = array(
 54:         'form.css',
 55:         'x2forms.css',
 56:         'main.css',
 57:         'layout.css',
 58:         'publisher.css',
 59:         'fontAwesome/css/font-awesome.css',
 60:     );
 61: 
 62:     /**
 63:      * Set the baseUri for generating URLs to static assets
 64:      * @param string $uri Base URI for web requests
 65:      */
 66:     public function setBaseUri($uri) {
 67:         $this->_baseUri = $uri;
 68:     }
 69: 
 70:     /**
 71:      * Enable use of static asset domains
 72:      */
 73:     public function enableAssetDomains() {
 74:         $assetDomains = Yii::app()->settings->assetBaseUrls;
 75:         $baseUri = Yii::app()->settings->externalBaseUri;
 76:         $this->baseUri = $baseUri;
 77:         $this->_staticAssetUrls = $assetDomains;
 78:         self::$enableAssetDomains = true;
 79:     }
 80: 
 81:     /**
 82:      * Return the next static asset baseUrl in a round-robin fashion
 83:      */
 84:     public function getNextRRAssetDomain() {
 85:         self::$_assetUrlsRRIndex = (self::$_assetUrlsRRIndex + 1) % count($this->_staticAssetUrls);
 86:         return $this->_staticAssetUrls[self::$_assetUrlsRRIndex].$this->_baseUri;
 87:     }
 88: 
 89:     /**
 90:      * Replace the baseUrl with an asset domain
 91:      * @param string $url Asset URL to substitute
 92:      * @returns string Replaced asset URL
 93:      */
 94:     public function substituteAssetDomain($url) {
 95:         $baseUrl = Yii::app()->request->baseUrl;
 96:         $assetDomain = $this->getNextRRAssetDomain();
 97: 
 98:         // Return if this asset is marked as skip, otherwise replace the base URL
 99:         foreach (self::$skipAssets as $asset)
100:             if (strpos ($url, $asset) !== false)
101:                 return $url;
102:         $url = str_replace ($baseUrl, $assetDomain, $url);
103:         return $url;
104:     }
105: }
106: