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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_Date
  */
 // require_once 'Zend/Date.php';
 
 /**
  * @see Zend_Date
  */
 // require_once 'Zend/Uri.php';
 
 // require_once 'Zend/Feed/Writer/Source.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_Entry
 {
 
     /**
      * Internal array containing all data associated with this entry or item.
      *
      * @var array
      */
     protected $_data = array();
 
     /**
      * Registered extensions
      *
      * @var array
      */
     protected $_extensions = array();
 
     /**
      * Holds the value "atom" or "rss" depending on the feed type set when
      * when last exported.
      *
      * @var string
      */
     protected $_type = null;
 
     /**
      * Constructor: Primarily triggers the registration of core extensions and
      * loads those appropriate to this data container.
      *
      * @return void
      */
     public function __construct()
     {
         Zend_Feed_Writer::registerCoreExtensions();
         $this->_loadExtensions();
     }
 
     /**
      * Set a single author
      *
      * @param  int $index
      * @return string|null
      */
     public function addAuthor($name, $email = null, $uri = null)
     {
         $author = array();
         if (is_array($name)) {
             if (!array_key_exists('name', $name)
                 || empty($name['name'])
                 || !is_string($name['name'])
             ) {
                 // require_once 'Zend/Feed/Exception.php';
                 throw new Zend_Feed_Exception('Invalid parameter: author array must include a "name" key with a non-empty string value');
             }
             $author['name'] = $name['name'];
             if (isset($name['email'])) {
                 if (empty($name['email']) || !is_string($name['email'])) {
                     // require_once 'Zend/Feed/Exception.php';
                     throw new Zend_Feed_Exception('Invalid parameter: "email" array value must be a non-empty string');
                 }
                 $author['email'] = $name['email'];
             }
             if (isset($name['uri'])) {
                 if (empty($name['uri'])
                     || !is_string($name['uri'])
                     || !Zend_Uri::check($name['uri'])
                 ) {
                     // require_once 'Zend/Feed/Exception.php';
                     throw new Zend_Feed_Exception('Invalid parameter: "uri" array value must be a non-empty string and valid URI/IRI');
                 }
                 $author['uri'] = $name['uri'];
             }
         /**
          * @deprecated
          * Array notation (above) is preferred and will be the sole supported input from ZF 2.0
          */
         } else {
             if (empty($name) || !is_string($name)) {
                 // require_once 'Zend/Feed/Exception.php';
                 throw new Zend_Feed_Exception('Invalid parameter: "name" must be a non-empty string value');
             }
             $author['name'] = $name;
             if (isset($email)) {
                 if (empty($email) || !is_string($email)) {
                     // require_once 'Zend/Feed/Exception.php';
                     throw new Zend_Feed_Exception('Invalid parameter: "email" value must be a non-empty string');
                 }
                 $author['email'] = $email;
             }
             if (isset($uri)) {
                 if (empty($uri) || !is_string($uri) || !Zend_Uri::check($uri)) {
                     // require_once 'Zend/Feed/Exception.php';
                     throw new Zend_Feed_Exception('Invalid parameter: "uri" value must be a non-empty string and valid URI/IRI');
                 }
                 $author['uri'] = $uri;
             }
         }
         $this->_data['authors'][] = $author;
     }
 
     /**
      * Set an array with feed authors
      *
      * @return array
      */
     public function addAuthors(array $authors)
     {
         foreach($authors as $author) {
             $this->addAuthor($author);
         }
     }
 
     /**
      * Set the feed character encoding
      *
      * @return string|null
      */
     public function setEncoding($encoding)
     {
         if (empty($encoding) || !is_string($encoding)) {
             // require_once 'Zend/Feed/Exception.php';
             throw new Zend_Feed_Exception('Invalid parameter: parameter must be a non-empty string');
         }
         $this->_data['encoding'] = $encoding;
     }
 
     /**
      * Get the feed character encoding
      *
      * @return string|null
      */
     public function getEncoding()
     {
         if (!array_key_exists('encoding', $this->_data)) {
             return 'UTF-8';
         }
         return $this->_data['encoding'];
     }
 
     /**
      * Set the copyright entry
      *
      * @return string|null
      */
     public function setCopyright($copyright)
     {
         if (empty($copyright) || !is_string($copyright)) {
             // require_once 'Zend/Feed/Exception.php';
             throw new Zend_Feed_Exception('Invalid parameter: parameter must be a non-empty string');
         }
         $this->_data['copyright'] = $copyright;
     }
 
     /**
      * Set the entry's content
      *
      * @return string|null
      */
     public function setContent($content)
     {
         if (empty($content) || !is_string($content)) {
             // require_once 'Zend/Feed/Exception.php';
             throw new Zend_Feed_Exception('Invalid parameter: parameter must be a non-empty string');
         }
         $this->_data['content'] = $content;
     }
 
     /**
      * Set the feed creation date
      *
      * @return string|null
      */
     public function setDateCreated($date = null)
     {
         $zdate = null;
         if ($date === null) {
             $zdate = new Zend_Date;
         } elseif ($date instanceof Zend_Date) {
             $zdate = $date;
         } elseif (ctype_digit((string)$date)) {
             $zdate = new Zend_Date($date, Zend_Date::TIMESTAMP);
         } else {
             // require_once 'Zend/Feed/Exception.php';
             throw new Zend_Feed_Exception('Invalid Zend_Date object or UNIX Timestamp passed as parameter');
         }
         $this->_data['dateCreated'] = $zdate;
     }
 
     /**
      * Set the feed modification date
      *
      * @return string|null
      */
     public function setDateModified($date = null)
     {
         $zdate = null;
         if ($date === null) {
             $zdate = new Zend_Date;
         } elseif ($date instanceof Zend_Date) {
             $zdate = $date;
         } elseif (ctype_digit((string)$date)) {
             $zdate = new Zend_Date($date, Zend_Date::TIMESTAMP);
         } else {
             // require_once 'Zend/Feed/Exception.php';
             throw new Zend_Feed_Exception('Invalid Zend_Date object or UNIX Timestamp passed as parameter');
         }
         $this->_data['dateModified'] = $zdate;
     }
 
     /**
      * Set the feed description
      *
      * @return string|null
      */
     public function setDescription($description)
     {
         if (empty($description) || !is_string($description)) {
             // require_once 'Zend/Feed/Exception.php';
             throw new Zend_Feed_Exception('Invalid parameter: parameter must be a non-empty string');
         }
         $this->_data['description'] = $description;
     }
 
     /**
      * Set the feed ID
      *
      * @return string|null
      */
     public function setId($id)
     {
         if (empty($id) || !is_string($id)) {
             // require_once 'Zend/Feed/Exception.php';
             throw new Zend_Feed_Exception('Invalid parameter: parameter must be a non-empty string');
         }
         $this->_data['id'] = $id;
     }
 
     /**
      * Set a link to the HTML source of this entry
      *
      * @return string|null
      */
     public function setLink($link)
     {
         if (empty($link) || !is_string($link) || !Zend_Uri::check($link)) {
             // require_once 'Zend/Feed/Exception.php';
             throw new Zend_Feed_Exception('Invalid parameter: parameter must be a non-empty string and valid URI/IRI');
         }
         $this->_data['link'] = $link;
     }
 
     /**
      * Set the number of comments associated with this entry
      *
      * @return string|null
      */
     public function setCommentCount($count)
     {
         if ( !is_numeric($count) || (int) $count < 0) {
             // require_once 'Zend/Feed/Exception.php';
             throw new Zend_Feed_Exception('Invalid parameter: "count" must be a non-empty integer number');
         }
         $this->_data['commentCount'] = (int) $count;
     }
 
     /**
      * Set a link to a HTML page containing comments associated with this entry
      *
      * @return string|null
      */
     public function setCommentLink($link)
     {
         if (empty($link) || !is_string($link) || !Zend_Uri::check($link)) {
             // require_once 'Zend/Feed/Exception.php';
             throw new Zend_Feed_Exception('Invalid parameter: "link" must be a non-empty string and valid URI/IRI');
         }
         $this->_data['commentLink'] = $link;
     }
 
     /**
      * Set a link to an XML feed for any comments associated with this entry
      *
      * @return string|null
      */
     public function setCommentFeedLink(array $link)
     {
         if (!isset($link['uri']) || !is_string($link['uri']) || !Zend_Uri::check($link['uri'])) {
             // require_once 'Zend/Feed/Exception.php';
             throw new Zend_Feed_Exception('Invalid parameter: "link" must be a non-empty string and valid URI/IRI');
         }
         if (!isset($link['type']) || !in_array($link['type'], array('atom', 'rss', 'rdf'))) {
             // require_once 'Zend/Feed/Exception.php';
             throw new Zend_Feed_Exception('Invalid parameter: "type" must be one'
             . ' of "atom", "rss" or "rdf"');
         }
         if (!isset($this->_data['commentFeedLinks'])) {
             $this->_data['commentFeedLinks'] = array();
         }
         $this->_data['commentFeedLinks'][] = $link;
     }
 
     /**
      * Set a links to an XML feed for any comments associated with this entry.
      * Each link is an array with keys "uri" and "type", where type is one of:
      * "atom", "rss" or "rdf".
      *
      * @return string|null
      */
     public function setCommentFeedLinks(array $links)
     {
         foreach ($links as $link) {
             $this->setCommentFeedLink($link);
         }
     }
 
     /**
      * Set the feed title
      *
      * @return string|null
      */
     public function setTitle($title)
     {
         if (empty($title) || !is_string($title)) {
             // require_once 'Zend/Feed/Exception.php';
             throw new Zend_Feed_Exception('Invalid parameter: parameter must be a non-empty string');
         }
         $this->_data['title'] = $title;
     }
 
     /**
      * Get an array with feed authors
      *
      * @return array
      */
     public function getAuthors()
     {
         if (!array_key_exists('authors', $this->_data)) {
             return null;
         }
         return $this->_data['authors'];
     }
 
     /**
      * Get the entry content
      *
      * @return string
      */
     public function getContent()
     {
         if (!array_key_exists('content', $this->_data)) {
             return null;
         }
         return $this->_data['content'];
     }
 
     /**
      * Get the entry copyright information
      *
      * @return string
      */
     public function getCopyright()
     {
         if (!array_key_exists('copyright', $this->_data)) {
             return null;
         }
         return $this->_data['copyright'];
     }
 
     /**
      * Get the entry creation date
      *
      * @return string
      */
     public function getDateCreated()
     {
         if (!array_key_exists('dateCreated', $this->_data)) {
             return null;
         }
         return $this->_data['dateCreated'];
     }
 
     /**
      * Get the entry modification date
      *
      * @return string
      */
     public function getDateModified()
     {
         if (!array_key_exists('dateModified', $this->_data)) {
             return null;
         }
         return $this->_data['dateModified'];
     }
 
     /**
      * Get the entry description
      *
      * @return string
      */
     public function getDescription()
     {
         if (!array_key_exists('description', $this->_data)) {
             return null;
         }
         return $this->_data['description'];
     }
 
     /**
      * Get the entry ID
      *
      * @return string
      */
     public function getId()
     {
         if (!array_key_exists('id', $this->_data)) {
             return null;
         }
         return $this->_data['id'];
     }
 
     /**
      * Get a link to the HTML source
      *
      * @return string|null
      */
     public function getLink()
     {
         if (!array_key_exists('link', $this->_data)) {
             return null;
         }
         return $this->_data['link'];
     }
 
 
     /**
      * Get all links
      *
      * @return array
      */
     public function getLinks()
     {
         if (!array_key_exists('links', $this->_data)) {
             return null;
         }
         return $this->_data['links'];
     }
 
     /**
      * Get the entry title
      *
      * @return string
      */
     public function getTitle()
     {
         if (!array_key_exists('title', $this->_data)) {
             return null;
         }
         return $this->_data['title'];
     }
 
     /**
      * Get the number of comments/replies for current entry
      *
      * @return integer
      */
     public function getCommentCount()
     {
         if (!array_key_exists('commentCount', $this->_data)) {
             return null;
         }
         return $this->_data['commentCount'];
     }
 
     /**
      * Returns a URI pointing to the HTML page where comments can be made on this entry
      *
      * @return string
      */
     public function getCommentLink()
     {
         if (!array_key_exists('commentLink', $this->_data)) {
             return null;
         }
         return $this->_data['commentLink'];
     }
 
     /**
      * Returns an array of URIs pointing to a feed of all comments for this entry
      * where the array keys indicate the feed type (atom, rss or rdf).
      *
      * @return string
      */
     public function getCommentFeedLinks()
     {
         if (!array_key_exists('commentFeedLinks', $this->_data)) {
             return null;
         }
         return $this->_data['commentFeedLinks'];
     }
 
     /**
      * Add a entry category
      *
      * @param string $category
      */
     public function addCategory(array $category)
     {
         if (!isset($category['term'])) {
             // require_once 'Zend/Feed/Exception.php';
             throw new Zend_Feed_Exception('Each category must be an array and '
             . 'contain at least a "term" element containing the machine '
             . ' readable category name');
         }
         if (isset($category['scheme'])) {
             if (empty($category['scheme'])
                 || !is_string($category['scheme'])
                 || !Zend_Uri::check($category['scheme'])
             ) {
                 // require_once 'Zend/Feed/Exception.php';
                 throw new Zend_Feed_Exception('The Atom scheme or RSS domain of'
                 . ' a category must be a valid URI');
             }
         }
         if (!isset($this->_data['categories'])) {
             $this->_data['categories'] = array();
         }
         $this->_data['categories'][] = $category;
     }
 
     /**
      * Set an array of entry categories
      *
      * @param array $categories
      */
     public function addCategories(array $categories)
     {
         foreach ($categories as $category) {
             $this->addCategory($category);
         }
     }
 
     /**
      * Get the entry categories
      *
      * @return string|null
      */
     public function getCategories()
     {
         if (!array_key_exists('categories', $this->_data)) {
             return null;
         }
         return $this->_data['categories'];
     }
 
     /**
      * Adds an enclosure to the entry. The array parameter may contain the
      * keys 'uri', 'type' and 'length'. Only 'uri' is required for Atom, though the
      * others must also be provided or RSS rendering (where they are required)
      * will throw an Exception.
      *
      * @param array $enclosures
      */
     public function setEnclosure(array $enclosure)
     {
         if (!isset($enclosure['uri'])) {
             // require_once 'Zend/Feed/Exception.php';
             throw new Zend_Feed_Exception('Enclosure "uri" is not set');
         }
         if (!Zend_Uri::check($enclosure['uri'])) {
             // require_once 'Zend/Feed/Exception.php';
             throw new Zend_Feed_Exception('Enclosure "uri" is not a valid URI/IRI');
         }
         $this->_data['enclosure'] = $enclosure;
     }
 
     /**
      * Retrieve an array of all enclosures to be added to entry.
      *
      * @return array
      */
     public function getEnclosure()
     {
         if (!array_key_exists('enclosure', $this->_data)) {
             return null;
         }
         return $this->_data['enclosure'];
     }
 
     /**
      * Unset a specific data point
      *
      * @param string $name
      */
     public function remove($name)
     {
         if (isset($this->_data[$name])) {
             unset($this->_data[$name]);
         }
     }
 
     /**
      * Get registered extensions
      *
      * @return array
      */
     public function getExtensions()
     {
         return $this->_extensions;
     }
 
     /**
      * Return an Extension object with the matching name (postfixed with _Entry)
      *
      * @param string $name
      * @return object
      */
     public function getExtension($name)
     {
         if (array_key_exists($name . '_Entry', $this->_extensions)) {
             return $this->_extensions[$name . '_Entry'];
         }
         return null;
     }
 
     /**
      * Set the current feed type being exported to "rss" or "atom". This allows
      * other objects to gracefully choose whether to execute or not, depending
      * on their appropriateness for the current type, e.g. renderers.
      *
      * @param string $type
      */
     public function setType($type)
     {
         $this->_type = $type;
     }
 
     /**
      * Retrieve the current or last feed type exported.
      *
      * @return string Value will be "rss" or "atom"
      */
     public function getType()
     {
         return $this->_type;
     }
 
     /**
      * Method overloading: call given method on first extension implementing it
      *
      * @param  string $method
      * @param  array $args
      * @return mixed
      * @throws Zend_Feed_Exception if no extensions implements the method
      */
     public function __call($method, $args)
     {
         foreach ($this->_extensions as $extension) {
             try {
                 return call_user_func_array(array($extension, $method), $args);
             } catch (Zend_Feed_Writer_Exception_InvalidMethodException $e) {
             }
         }
         // require_once 'Zend/Feed/Exception.php';
         throw new Zend_Feed_Exception('Method: ' . $method
             . ' does not exist and could not be located on a registered Extension');
     }
 
     /**
      * Creates a new Zend_Feed_Writer_Source data container for use. This is NOT
      * added to the current feed automatically, but is necessary to create a
      * container with some initial values preset based on the current feed data.
      *
      * @return Zend_Feed_Writer_Source
      */
     public function createSource()
     {
         $source = new Zend_Feed_Writer_Source;
         if ($this->getEncoding()) {
             $source->setEncoding($this->getEncoding());
         }
         $source->setType($this->getType());
         return $source;
     }
 
     /**
      * Appends a Zend_Feed_Writer_Entry object representing a new entry/item
      * the feed data container's internal group of entries.
      *
      * @param Zend_Feed_Writer_Source $source
      */
     public function setSource(Zend_Feed_Writer_Source $source)
     {
         $this->_data['source'] = $source;
     }
 
     /**
      * @return Zend_Feed_Writer_Source
      */
     public function getSource()
     {
         if (isset($this->_data['source'])) {
             return $this->_data['source'];
         }
         return null;
     }
 
     /**
      * Load extensions from Zend_Feed_Writer
      *
      * @return void
      */
     protected function _loadExtensions()
     {
         $all = Zend_Feed_Writer::getExtensions();
         $exts = $all['entry'];
         foreach ($exts as $ext) {
             $className = Zend_Feed_Writer::getPluginLoader()->getClassName($ext);
             $this->_extensions[$ext] = new $className();
             $this->_extensions[$ext]->setEncoding($this->getEncoding());
         }
     }
 }