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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_Renderer_RendererAbstract
  */
 // require_once 'Zend/Feed/Writer/Renderer/RendererAbstract.php';
 
 // require_once 'Zend/Feed/Writer/Renderer/Feed/Atom/Source.php';
 
 /** @see Zend_Xml_Security */
 // require_once 'Zend/Xml/Security.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_Renderer_Entry_Atom
     extends Zend_Feed_Writer_Renderer_RendererAbstract
     implements Zend_Feed_Writer_Renderer_RendererInterface
 {
     /**
      * Constructor
      *
      * @param  Zend_Feed_Writer_Entry $container
      * @return void
      */
     public function __construct (Zend_Feed_Writer_Entry $container)
     {
         parent::__construct($container);
     }
 
     /**
      * Render atom entry
      *
      * @return Zend_Feed_Writer_Renderer_Entry_Atom
      */
     public function render()
     {
         $this->_dom = new DOMDocument('1.0', $this->_container->getEncoding());
         $this->_dom->formatOutput = true;
         $entry = $this->_dom->createElementNS(Zend_Feed_Writer::NAMESPACE_ATOM_10, 'entry');
         $this->_dom->appendChild($entry);
 
         $this->_setSource($this->_dom, $entry);
         $this->_setTitle($this->_dom, $entry);
         $this->_setDescription($this->_dom, $entry);
         $this->_setDateCreated($this->_dom, $entry);
         $this->_setDateModified($this->_dom, $entry);
         $this->_setLink($this->_dom, $entry);
         $this->_setId($this->_dom, $entry);
         $this->_setAuthors($this->_dom, $entry);
         $this->_setEnclosure($this->_dom, $entry);
         $this->_setContent($this->_dom, $entry);
         $this->_setCategories($this->_dom, $entry);
 
         foreach ($this->_extensions as $ext) {
             $ext->setType($this->getType());
             $ext->setRootElement($this->getRootElement());
             $ext->setDomDocument($this->getDomDocument(), $entry);
             $ext->render();
         }
 
         return $this;
     }
 
     /**
      * Set entry title
      *
      * @param  DOMDocument $dom
      * @param  DOMElement $root
      * @return void
      */
     protected function _setTitle(DOMDocument $dom, DOMElement $root)
     {
         if(!$this->getDataContainer()->getTitle()) {
             // require_once 'Zend/Feed/Exception.php';
             $message = 'Atom 1.0 entry elements MUST contain exactly one'
             . ' atom:title element but a title has not been set';
             $exception = new Zend_Feed_Exception($message);
             if (!$this->_ignoreExceptions) {
                 throw $exception;
             } else {
                 $this->_exceptions[] = $exception;
                 return;
             }
         }
         $title = $dom->createElement('title');
         $root->appendChild($title);
         $title->setAttribute('type', 'html');
         $cdata = $dom->createCDATASection($this->getDataContainer()->getTitle());
         $title->appendChild($cdata);
     }
 
     /**
      * Set entry description
      *
      * @param  DOMDocument $dom
      * @param  DOMElement $root
      * @return void
      */
     protected function _setDescription(DOMDocument $dom, DOMElement $root)
     {
         if(!$this->getDataContainer()->getDescription()) {
             return; // unless src content or base64
         }
         $subtitle = $dom->createElement('summary');
         $root->appendChild($subtitle);
         $subtitle->setAttribute('type', 'html');
         $cdata = $dom->createCDATASection(
             $this->getDataContainer()->getDescription()
         );
         $subtitle->appendChild($cdata);
     }
 
     /**
      * Set date entry was modified
      *
      * @param  DOMDocument $dom
      * @param  DOMElement $root
      * @return void
      */
     protected function _setDateModified(DOMDocument $dom, DOMElement $root)
     {
         if(!$this->getDataContainer()->getDateModified()) {
             // require_once 'Zend/Feed/Exception.php';
             $message = 'Atom 1.0 entry elements MUST contain exactly one'
             . ' atom:updated element but a modification date has not been set';
             $exception = new Zend_Feed_Exception($message);
             if (!$this->_ignoreExceptions) {
                 throw $exception;
             } else {
                 $this->_exceptions[] = $exception;
                 return;
             }
         }
 
         $updated = $dom->createElement('updated');
         $root->appendChild($updated);
         $text = $dom->createTextNode(
             $this->getDataContainer()->getDateModified()->get(Zend_Date::ISO_8601)
         );
         $updated->appendChild($text);
     }
 
     /**
      * Set date entry was created
      *
      * @param  DOMDocument $dom
      * @param  DOMElement $root
      * @return void
      */
     protected function _setDateCreated(DOMDocument $dom, DOMElement $root)
     {
         if (!$this->getDataContainer()->getDateCreated()) {
             return;
         }
         $el = $dom->createElement('published');
         $root->appendChild($el);
         $text = $dom->createTextNode(
             $this->getDataContainer()->getDateCreated()->get(Zend_Date::ISO_8601)
         );
         $el->appendChild($text);
     }
 
     /**
      * Set entry authors
      *
      * @param  DOMDocument $dom
      * @param  DOMElement $root
      * @return void
      */
     protected function _setAuthors(DOMDocument $dom, DOMElement $root)
     {
         $authors = $this->_container->getAuthors();
         if ((!$authors || empty($authors))) {
             /**
              * This will actually trigger an Exception at the feed level if
              * a feed level author is not set.
              */
             return;
         }
         foreach ($authors as $data) {
             $author = $this->_dom->createElement('author');
             $name = $this->_dom->createElement('name');
             $author->appendChild($name);
             $root->appendChild($author);
             $text = $dom->createTextNode($data['name']);
             $name->appendChild($text);
             if (array_key_exists('email', $data)) {
                 $email = $this->_dom->createElement('email');
                 $author->appendChild($email);
                 $text = $dom->createTextNode($data['email']);
                 $email->appendChild($text);
             }
             if (array_key_exists('uri', $data)) {
                 $uri = $this->_dom->createElement('uri');
                 $author->appendChild($uri);
                 $text = $dom->createTextNode($data['uri']);
                 $uri->appendChild($text);
             }
         }
     }
 
     /**
      * Set entry enclosure
      *
      * @param  DOMDocument $dom
      * @param  DOMElement $root
      * @return void
      */
     protected function _setEnclosure(DOMDocument $dom, DOMElement $root)
     {
         $data = $this->_container->getEnclosure();
         if ((!$data || empty($data))) {
             return;
         }
         $enclosure = $this->_dom->createElement('link');
         $enclosure->setAttribute('rel', 'enclosure');
         if (isset($data['type'])) {
             $enclosure->setAttribute('type', $data['type']);
         }
         if (isset($data['length'])) {
             $enclosure->setAttribute('length', $data['length']);
         }
         $enclosure->setAttribute('href', $data['uri']);
         $root->appendChild($enclosure);
     }
 
     protected function _setLink(DOMDocument $dom, DOMElement $root)
     {
         if(!$this->getDataContainer()->getLink()) {
             return;
         }
         $link = $dom->createElement('link');
         $root->appendChild($link);
         $link->setAttribute('rel', 'alternate');
         $link->setAttribute('type', 'text/html');
         $link->setAttribute('href', $this->getDataContainer()->getLink());
     }
 
     /**
      * Set entry identifier
      *
      * @param  DOMDocument $dom
      * @param  DOMElement $root
      * @return void
      */
     protected function _setId(DOMDocument $dom, DOMElement $root)
     {
         if(!$this->getDataContainer()->getId()
         && !$this->getDataContainer()->getLink()) {
             // require_once 'Zend/Feed/Exception.php';
             $message = 'Atom 1.0 entry elements MUST contain exactly one '
             . 'atom:id element, or as an alternative, we can use the same '
             . 'value as atom:link however neither a suitable link nor an '
             . 'id have been set';
             $exception = new Zend_Feed_Exception($message);
             if (!$this->_ignoreExceptions) {
                 throw $exception;
             } else {
                 $this->_exceptions[] = $exception;
                 return;
             }
         }
 
         if (!$this->getDataContainer()->getId()) {
             $this->getDataContainer()->setId(
                 $this->getDataContainer()->getLink());
         }
         if (!Zend_Uri::check($this->getDataContainer()->getId()) &&
         !preg_match("#^urn:[a-zA-Z0-9][a-zA-Z0-9\-]{1,31}:([a-zA-Z0-9\(\)\+\,\.\:\=\@\;\$\_\!\*\-]|%[0-9a-fA-F]{2})*#",
             $this->getDataContainer()->getId()
         ) && !$this->_validateTagUri($this->getDataContainer()->getId())) {
             // require_once 'Zend/Feed/Exception.php';
             throw new Zend_Feed_Exception('Atom 1.0 IDs must be a valid URI/IRI');
         }
         $id = $dom->createElement('id');
         $root->appendChild($id);
         $text = $dom->createTextNode($this->getDataContainer()->getId());
         $id->appendChild($text);
     }
 
     /**
      * Validate a URI using the tag scheme (RFC 4151)
      *
      * @param string $id
      * @return bool
      */
     protected function _validateTagUri($id)
     {
         if (preg_match('/^tag:(?<name>.*),(?<date>\d{4}-?\d{0,2}-?\d{0,2}):(?<specific>.*)(.*:)*$/', $id, $matches)) {
             $dvalid = false;
             $nvalid = false;
             $date = $matches['date'];
             $d6 = strtotime($date);
             if ((strlen($date) == 4) && $date <= date('Y')) {
                 $dvalid = true;
             } elseif ((strlen($date) == 7) && ($d6 < strtotime("now"))) {
                 $dvalid = true;
             } elseif ((strlen($date) == 10) && ($d6 < strtotime("now"))) {
                 $dvalid = true;
             }
             $validator = new Zend_Validate_EmailAddress;
             if ($validator->isValid($matches['name'])) {
                 $nvalid = true;
             } else {
                 $nvalid = $validator->isValid('info@' . $matches['name']);
             }
             return $dvalid && $nvalid;
 
         }
         return false;
     }
 
     /**
      * Set entry content
      *
      * @param  DOMDocument $dom
      * @param  DOMElement $root
      * @return void
      */
     protected function _setContent(DOMDocument $dom, DOMElement $root)
     {
         $content = $this->getDataContainer()->getContent();
         if (!$content && !$this->getDataContainer()->getLink()) {
             // require_once 'Zend/Feed/Exception.php';
             $message = 'Atom 1.0 entry elements MUST contain exactly one '
             . 'atom:content element, or as an alternative, at least one link '
             . 'with a rel attribute of "alternate" to indicate an alternate '
             . 'method to consume the content.';
             $exception = new Zend_Feed_Exception($message);
             if (!$this->_ignoreExceptions) {
                 throw $exception;
             } else {
                 $this->_exceptions[] = $exception;
                 return;
             }
         }
         if (!$content) {
             return;
         }
         $element = $dom->createElement('content');
         $element->setAttribute('type', 'xhtml');
         $xhtmlElement = $this->_loadXhtml($content);
         $xhtml = $dom->importNode($xhtmlElement, true);
         $element->appendChild($xhtml);
         $root->appendChild($element);
     }
 
     /**
      * Load a HTML string and attempt to normalise to XML
      */
     protected function _loadXhtml($content)
     {
         $xhtml = '';
         if (class_exists('tidy', false)) {
             $tidy = new tidy;
             $config = array(
                 'output-xhtml' => true,
                 'show-body-only' => true,
                 'quote-nbsp' => false
             );
             $encoding = str_replace('-', '', $this->getEncoding());
             $tidy->parseString($content, $config, $encoding);
             $tidy->cleanRepair();
             $xhtml = (string) $tidy;
         } else {
             $xhtml = $content;
         }
         $xhtml = preg_replace(array(
             "/(<[\/]?)([a-zA-Z]+)/"
         ), '$1xhtml:$2', $xhtml);
         $dom = new DOMDocument('1.0', $this->getEncoding());
 
         $dom = Zend_Xml_Security::scan('<xhtml:div xmlns:xhtml="http://www.w3.org/1999/xhtml">'
             . $xhtml . '</xhtml:div>', $dom);
         return $dom->documentElement;
     }
 
     /**
      * Set entry cateories
      *
      * @param  DOMDocument $dom
      * @param  DOMElement $root
      * @return void
      */
     protected function _setCategories(DOMDocument $dom, DOMElement $root)
     {
         $categories = $this->getDataContainer()->getCategories();
         if (!$categories) {
             return;
         }
         foreach ($categories as $cat) {
             $category = $dom->createElement('category');
             $category->setAttribute('term', $cat['term']);
             if (isset($cat['label'])) {
                 $category->setAttribute('label', $cat['label']);
             } else {
                 $category->setAttribute('label', $cat['term']);
             }
             if (isset($cat['scheme'])) {
                 $category->setAttribute('scheme', $cat['scheme']);
             }
             $root->appendChild($category);
         }
     }
 
     /**
      * Append Source element (Atom 1.0 Feed Metadata)
      *
      * @param  DOMDocument $dom
      * @param  DOMElement $root
      * @return void
      */
     protected function _setSource(DOMDocument $dom, DOMElement $root)
     {
         $source = $this->getDataContainer()->getSource();
         if (!$source) {
             return;
         }
         $renderer = new Zend_Feed_Writer_Renderer_Feed_Atom_Source($source);
         $renderer->setType($this->getType());
         $element = $renderer->render()->getElement();
         $imported = $dom->importNode($element, true);
         $root->appendChild($imported);
     }
 }