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 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Feed_Writer
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /**
  * @see Zend_Feed_Writer_Extension_RendererAbstract
  */
 // require_once 'Zend/Feed/Writer/Extension/RendererAbstract.php';
 
 /**
  * @category   Zend
  * @package    Zend_Feed_Writer
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Feed_Writer_Extension_ITunes_Renderer_Entry
     extends Zend_Feed_Writer_Extension_RendererAbstract
 {
     /**
      * Set to TRUE if a rendering method actually renders something. This
      * is used to prevent premature appending of a XML namespace declaration
      * until an element which requires it is actually appended.
      *
      * @var bool
      */
     protected $_called = false;
 
     /**
      * Render entry
      *
      * @return void
      */
     public function render()
     {
         $this->_setAuthors($this->_dom, $this->_base);
         $this->_setBlock($this->_dom, $this->_base);
         $this->_setDuration($this->_dom, $this->_base);
         $this->_setExplicit($this->_dom, $this->_base);
         $this->_setKeywords($this->_dom, $this->_base);
         $this->_setSubtitle($this->_dom, $this->_base);
         $this->_setSummary($this->_dom, $this->_base);
         if ($this->_called) {
             $this->_appendNamespaces();
         }
     }
 
     /**
      * Append namespaces to entry root
      *
      * @return void
      */
     protected function _appendNamespaces()
     {
         $this->getRootElement()->setAttribute('xmlns:itunes',
             'http://www.itunes.com/dtds/podcast-1.0.dtd');
     }
 
     /**
      * Set entry authors
      *
      * @param  DOMDocument $dom
      * @param  DOMElement $root
      * @return void
      */
     protected function _setAuthors(DOMDocument $dom, DOMElement $root)
     {
         $authors = $this->getDataContainer()->getItunesAuthors();
         if (!$authors || empty($authors)) {
             return;
         }
         foreach ($authors as $author) {
             $el = $dom->createElement('itunes:author');
             $text = $dom->createTextNode($author);
             $el->appendChild($text);
             $root->appendChild($el);
             $this->_called = true;
         }
     }
 
     /**
      * Set itunes block
      *
      * @param  DOMDocument $dom
      * @param  DOMElement $root
      * @return void
      */
     protected function _setBlock(DOMDocument $dom, DOMElement $root)
     {
         $block = $this->getDataContainer()->getItunesBlock();
         if ($block === null) {
             return;
         }
         $el = $dom->createElement('itunes:block');
         $text = $dom->createTextNode($block);
         $el->appendChild($text);
         $root->appendChild($el);
         $this->_called = true;
     }
 
     /**
      * Set entry duration
      *
      * @param  DOMDocument $dom
      * @param  DOMElement $root
      * @return void
      */
     protected function _setDuration(DOMDocument $dom, DOMElement $root)
     {
         $duration = $this->getDataContainer()->getItunesDuration();
         if (!$duration) {
             return;
         }
         $el = $dom->createElement('itunes:duration');
         $text = $dom->createTextNode($duration);
         $el->appendChild($text);
         $root->appendChild($el);
         $this->_called = true;
     }
 
     /**
      * Set explicit flag
      *
      * @param  DOMDocument $dom
      * @param  DOMElement $root
      * @return void
      */
     protected function _setExplicit(DOMDocument $dom, DOMElement $root)
     {
         $explicit = $this->getDataContainer()->getItunesExplicit();
         if ($explicit === null) {
             return;
         }
         $el = $dom->createElement('itunes:explicit');
         $text = $dom->createTextNode($explicit);
         $el->appendChild($text);
         $root->appendChild($el);
         $this->_called = true;
     }
 
     /**
      * Set entry keywords
      *
      * @param  DOMDocument $dom
      * @param  DOMElement $root
      * @return void
      */
     protected function _setKeywords(DOMDocument $dom, DOMElement $root)
     {
         $keywords = $this->getDataContainer()->getItunesKeywords();
         if (!$keywords || empty($keywords)) {
             return;
         }
         $el = $dom->createElement('itunes:keywords');
         $text = $dom->createTextNode(implode(',', $keywords));
         $el->appendChild($text);
         $root->appendChild($el);
         $this->_called = true;
     }
 
     /**
      * Set entry subtitle
      *
      * @param  DOMDocument $dom
      * @param  DOMElement $root
      * @return void
      */
     protected function _setSubtitle(DOMDocument $dom, DOMElement $root)
     {
         $subtitle = $this->getDataContainer()->getItunesSubtitle();
         if (!$subtitle) {
             return;
         }
         $el = $dom->createElement('itunes:subtitle');
         $text = $dom->createTextNode($subtitle);
         $el->appendChild($text);
         $root->appendChild($el);
         $this->_called = true;
     }
 
     /**
      * Set entry summary
      *
      * @param  DOMDocument $dom
      * @param  DOMElement $root
      * @return void
      */
     protected function _setSummary(DOMDocument $dom, DOMElement $root)
     {
         $summary = $this->getDataContainer()->getItunesSummary();
         if (!$summary) {
             return;
         }
         $el = $dom->createElement('itunes:summary');
         $text = $dom->createTextNode($summary);
         $el->appendChild($text);
         $root->appendChild($el);
         $this->_called = true;
     }
 }