<?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_Reader

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 * @version    $Id: Rss.php 23170 2010-10-19 18:29:24Z mabe $

 */

/**

 * @see Zend_Feed_Reader_FeedAbstract

 */

require_once 'Zend/Feed/Reader/FeedAbstract.php';

/**

 * @see Zend_feed_Reader_Extension_Atom_Feed

 */

require_once 'Zend/Feed/Reader/Extension/Atom/Feed.php';

/**

 * @see Zend_Feed_Reader_Extension_DublinCore_Feed

 */

require_once 'Zend/Feed/Reader/Extension/DublinCore/Feed.php';

/**

 * @see Zend_Date

 */

require_once 'Zend/Date.php';

/**

 * @see Zend_Feed_Reader_Collection_Author

 */

require_once 'Zend/Feed/Reader/Collection/Author.php';

/**

 * @category   Zend

 * @package    Zend_Feed_Reader

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Feed_Reader_Feed_Rss extends Zend_Feed_Reader_FeedAbstract

{

    /**

     * Constructor

     *

     * @param  DOMDocument $dom

     * @param  string $type

     */

    public function __construct(DomDocument $dom, $type = null)

    {

        parent::__construct($dom, $type);

        $dublinCoreClass = Zend_Feed_Reader::getPluginLoader()->getClassName('DublinCore_Feed');

        $this->_extensions['DublinCore_Feed'] = new $dublinCoreClass($dom, $this->_data['type'], $this->_xpath);

        $atomClass = Zend_Feed_Reader::getPluginLoader()->getClassName('Atom_Feed');

        $this->_extensions['Atom_Feed'] = new $atomClass($dom, $this->_data['type'], $this->_xpath);

        if ($this->getType() !== Zend_Feed_Reader::TYPE_RSS_10 && $this->getType() !== Zend_Feed_Reader::TYPE_RSS_090) {

            $xpathPrefix = '/rss/channel';

        } else {

            $xpathPrefix = '/rdf:RDF/rss:channel';

        }

        foreach ($this->_extensions as $extension) {

            $extension->setXpathPrefix($xpathPrefix);

        }

    }

    /**

     * Get a single author

     *

     * @param  int $index

     * @return string|null

     */

    public function getAuthor($index = 0)

    {

        $authors = $this->getAuthors();

        if (isset($authors[$index])) {

            return $authors[$index];

        }

        return null;

    }

    /**

     * Get an array with feed authors

     *

     * @return array

     */

    public function getAuthors()

    {

        if (array_key_exists('authors', $this->_data)) {

            return $this->_data['authors'];

        }

        $authors = array();

        $authors_dc = $this->getExtension('DublinCore')->getAuthors();

        if (!empty($authors_dc)) {

            foreach ($authors_dc as $author) {

                $authors[] = array(

                    'name' => $author['name']

                );

            }

        }

        /**

         * Technically RSS doesn't specific author element use at the feed level

         * but it's supported on a "just in case" basis.

         */

        if ($this->getType() !== Zend_Feed_Reader::TYPE_RSS_10

        && $this->getType() !== Zend_Feed_Reader::TYPE_RSS_090) {

            $list = $this->_xpath->query('//author');

        } else {

            $list = $this->_xpath->query('//rss:author');

        }

        if ($list->length) {

            foreach ($list as $author) {

                $string = trim($author->nodeValue);

                $email = null;

                $name = null;

                $data = array();

                // Pretty rough parsing - but it's a catchall

                if (preg_match("/^.*@[^ ]*/", $string, $matches)) {

                    $data['email'] = trim($matches[0]);

                    if (preg_match("/\((.*)\)$/", $string, $matches)) {

                        $data['name'] = $matches[1];

                    }

                    $authors[] = $data;

                } 

            }

        }

        if (count($authors) == 0) {

            $authors = $this->getExtension('Atom')->getAuthors();

        } else {

            $authors = new Zend_Feed_Reader_Collection_Author(

                Zend_Feed_Reader::arrayUnique($authors)

            );

        }

        if (count($authors) == 0) {

            $authors = null;

        }

        $this->_data['authors'] = $authors;

        return $this->_data['authors'];

    }

    /**

     * Get the copyright entry

     *

     * @return string|null

     */

    public function getCopyright()

    {

        if (array_key_exists('copyright', $this->_data)) {

            return $this->_data['copyright'];

        }

        $copyright = null;

        if ($this->getType() !== Zend_Feed_Reader::TYPE_RSS_10 &&

            $this->getType() !== Zend_Feed_Reader::TYPE_RSS_090) {

            $copyright = $this->_xpath->evaluate('string(/rss/channel/copyright)');

        }

        if (!$copyright && $this->getExtension('DublinCore') !== null) {

            $copyright = $this->getExtension('DublinCore')->getCopyright();

        }

        if (empty($copyright)) {

            $copyright = $this->getExtension('Atom')->getCopyright();

        }

        if (!$copyright) {

            $copyright = null;

        }

        $this->_data['copyright'] = $copyright;

        return $this->_data['copyright'];

    }

    /**

     * Get the feed creation date

     *

     * @return string|null

     */

    public function getDateCreated()

    {

        return $this->getDateModified();

    }

    /**

     * Get the feed modification date

     *

     * @return Zend_Date

     */

    public function getDateModified()

    {

        if (array_key_exists('datemodified', $this->_data)) {

            return $this->_data['datemodified'];

        }

        $dateModified = null;

        $date = null;

        if ($this->getType() !== Zend_Feed_Reader::TYPE_RSS_10 &&

            $this->getType() !== Zend_Feed_Reader::TYPE_RSS_090) {

            $dateModified = $this->_xpath->evaluate('string(/rss/channel/pubDate)');

            if (!$dateModified) {

                $dateModified = $this->_xpath->evaluate('string(/rss/channel/lastBuildDate)');

            }

            if ($dateModified) {

                $dateModifiedParsed = strtotime($dateModified);

                if ($dateModifiedParsed) {

                    $date = new Zend_Date($dateModifiedParsed);

                } else {

                    $dateStandards = array(Zend_Date::RSS, Zend_Date::RFC_822,

                    Zend_Date::RFC_2822, Zend_Date::DATES);

                    $date = new Zend_Date;

                    foreach ($dateStandards as $standard) {

                        try {

                            $date->set($dateModified, $standard);

                            break;

                        } catch (Zend_Date_Exception $e) {

                            if ($standard == Zend_Date::DATES) {

                                require_once 'Zend/Feed/Exception.php';

                                throw new Zend_Feed_Exception(

                                    'Could not load date due to unrecognised'

                                    .' format (should follow RFC 822 or 2822):'

                                    . $e->getMessage(),

                                    0, $e

                                );

                            }

                        }

                    }

                }

            }

        }

        if (!$date) {

            $date = $this->getExtension('DublinCore')->getDate();

        }

        if (!$date) {

            $date = $this->getExtension('Atom')->getDateModified();

        }

        if (!$date) {

            $date = null;

        }

        $this->_data['datemodified'] = $date;

        return $this->_data['datemodified'];

    }

    /**

     * Get the feed lastBuild date

     *

     * @return Zend_Date

     */

    public function getLastBuildDate()

    {

        if (array_key_exists('lastBuildDate', $this->_data)) {

            return $this->_data['lastBuildDate'];

        }

        $lastBuildDate = null;

        $date = null;

        if ($this->getType() !== Zend_Feed_Reader::TYPE_RSS_10 &&

            $this->getType() !== Zend_Feed_Reader::TYPE_RSS_090) {

            $lastBuildDate = $this->_xpath->evaluate('string(/rss/channel/lastBuildDate)');

            if ($lastBuildDate) {

                $lastBuildDateParsed = strtotime($lastBuildDate);

                if ($lastBuildDateParsed) {

                    $date = new Zend_Date($lastBuildDateParsed);

                } else {

                    $dateStandards = array(Zend_Date::RSS, Zend_Date::RFC_822,

                    Zend_Date::RFC_2822, Zend_Date::DATES);

                    $date = new Zend_Date;

                    foreach ($dateStandards as $standard) {

                        try {

                            $date->set($lastBuildDate, $standard);

                            break;

                        } catch (Zend_Date_Exception $e) {

                            if ($standard == Zend_Date::DATES) {

                                require_once 'Zend/Feed/Exception.php';

                                throw new Zend_Feed_Exception(

                                    'Could not load date due to unrecognised'

                                    .' format (should follow RFC 822 or 2822):'

                                    . $e->getMessage(),

                                    0, $e

                                );

                            }

                        }

                    }

                }

            }

        }

        if (!$date) {

            $date = null;

        }

        $this->_data['lastBuildDate'] = $date;

        return $this->_data['lastBuildDate'];

    }

    /**

     * Get the feed description

     *

     * @return string|null

     */

    public function getDescription()

    {

        if (array_key_exists('description', $this->_data)) {

            return $this->_data['description'];

        }

        $description = null;

        if ($this->getType() !== Zend_Feed_Reader::TYPE_RSS_10 &&

            $this->getType() !== Zend_Feed_Reader::TYPE_RSS_090) {

            $description = $this->_xpath->evaluate('string(/rss/channel/description)');

        } else {

            $description = $this->_xpath->evaluate('string(/rdf:RDF/rss:channel/rss:description)');

        }

        if (!$description && $this->getExtension('DublinCore') !== null) {

            $description = $this->getExtension('DublinCore')->getDescription();

        }

        if (empty($description)) {

            $description = $this->getExtension('Atom')->getDescription();

        }

        if (!$description) {

            $description = null;

        }

        $this->_data['description'] = $description;

        return $this->_data['description'];

    }

    /**

     * Get the feed ID

     *

     * @return string|null

     */

    public function getId()

    {

        if (array_key_exists('id', $this->_data)) {

            return $this->_data['id'];

        }

        $id = null;

        if ($this->getType() !== Zend_Feed_Reader::TYPE_RSS_10 &&

            $this->getType() !== Zend_Feed_Reader::TYPE_RSS_090) {

            $id = $this->_xpath->evaluate('string(/rss/channel/guid)');

        }

        if (!$id && $this->getExtension('DublinCore') !== null) {

            $id = $this->getExtension('DublinCore')->getId();

        }

        if (empty($id)) {

            $id = $this->getExtension('Atom')->getId();

        }

        if (!$id) {

            if ($this->getLink()) {

                $id = $this->getLink();

            } elseif ($this->getTitle()) {

                $id = $this->getTitle();

            } else {

                $id = null;

            }

        }

        $this->_data['id'] = $id;

        return $this->_data['id'];

    }

    /**

     * Get the feed image data

     *

     * @return array|null

     */

    public function getImage()

    {

        if (array_key_exists('image', $this->_data)) {

            return $this->_data['image'];

        }

        if ($this->getType() !== Zend_Feed_Reader::TYPE_RSS_10 &&

            $this->getType() !== Zend_Feed_Reader::TYPE_RSS_090) {

            $list = $this->_xpath->query('/rss/channel/image');

            $prefix = '/rss/channel/image[1]';

        } else {

            $list = $this->_xpath->query('/rdf:RDF/rss:channel/rss:image');

            $prefix = '/rdf:RDF/rss:channel/rss:image[1]';

        }

        if ($list->length > 0) {

            $image = array();