<?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

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

 */

/**

 * @see Zend_Feed_Reader

 */

require_once 'Zend/Feed/Reader.php';

/**

 * @see Zend_Feed_Reader_Extension_EntryAbstract

 */

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

/**

 * @see Zend_Date

 */

require_once 'Zend/Date.php';

/**

 * @see Zend_Uri

 */

require_once 'Zend/Uri.php';

/**

 * @see Zend_Feed_Reader_Collection_Category

 */

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

/**

 * @see Zend_Feed_Reader_Feed_Atom_Source

 */

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

/**

 * @category   Zend

 * @package    Zend_Feed_Reader

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

 */

class Zend_Feed_Reader_Extension_Atom_Entry

    extends Zend_Feed_Reader_Extension_EntryAbstract

{

    /**

     * Get the specified 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();

        $list = $this->getXpath()->query($this->getXpathPrefix() . '//atom:author');

        if (!$list->length) {

            /**

             * TODO: Limit query to feed level els only!

             */

            $list = $this->getXpath()->query('//atom:author');

        }

        if ($list->length) {

            foreach ($list as $author) {

                $author = $this->_getAuthor($author);

                if (!empty($author)) {

                    $authors[] = $author;

                }

            }

        }

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

            $authors = null;

        } else {

            $authors = new Zend_Feed_Reader_Collection_Author(

                Zend_Feed_Reader::arrayUnique($authors)

            );

        }

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

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

    }

    /**

     * Get the entry content

     *

     * @return string

     */

    public function getContent()

    {

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

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

        }

        $content = null;

        $el = $this->getXpath()->query($this->getXpathPrefix() . '/atom:content');

        if($el->length > 0) {

            $el = $el->item(0);

            $type = $el->getAttribute('type');

            switch ($type) {

                case '':

                case 'text':

                case 'text/plain':

                case 'html':

                case 'text/html':

                    $content = $el->nodeValue;

                break;

                case 'xhtml':

                    $this->getXpath()->registerNamespace('xhtml', 'http://www.w3.org/1999/xhtml');

                    $xhtml = $this->getXpath()->query(

                        $this->getXpathPrefix() . '/atom:content/xhtml:div'

                    )->item(0);

                    //$xhtml->setAttribute('xmlns', 'http://www.w3.org/1999/xhtml');

                    $d = new DOMDocument('1.0', $this->getEncoding());

                    $xhtmls = $d->importNode($xhtml, true);

                    $d->appendChild($xhtmls);

                    $content = $this->_collectXhtml(

                        $d->saveXML(),

                        $d->lookupPrefix('http://www.w3.org/1999/xhtml')

                    );

                break;

            }

        }

        if (!$content) {

            $content = $this->getDescription();

        }

        $this->_data['content'] = trim($content);

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

    }

    /**

     * Parse out XHTML to remove the namespacing

     */

    protected function _collectXhtml($xhtml, $prefix)

    {

        if (!empty($prefix)) $prefix = $prefix . ':';

        $matches = array(

            "/<\?xml[^<]*>[^<]*<" . $prefix . "div[^<]*/",

            "/<\/" . $prefix . "div>\s*$/"

        );

        $xhtml = preg_replace($matches, '', $xhtml);

        if (!empty($prefix)) {

            $xhtml = preg_replace("/(<[\/]?)" . $prefix . "([a-zA-Z]+)/", '$1$2', $xhtml);

        }

        return $xhtml;

    }

    /**

     * Get the entry creation date

     *

     * @return string

     */

    public function getDateCreated()

    {

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

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

        }

        $date = null;

        if ($this->_getAtomType() === Zend_Feed_Reader::TYPE_ATOM_03) {

            $dateCreated = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:created)');

        } else {

            $dateCreated = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:published)');

        }

        if ($dateCreated) {

            $date = new Zend_Date;

            $date->set($dateCreated, Zend_Date::ISO_8601);

        }

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

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

    }

    /**

     * Get the entry modification date

     *

     * @return string

     */

    public function getDateModified()

    {

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

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

        }

        $date = null;

        if ($this->_getAtomType() === Zend_Feed_Reader::TYPE_ATOM_03) {

            $dateModified = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:modified)');

        } else {

            $dateModified = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:updated)');

        }

        if ($dateModified) {

            $date = new Zend_Date;

            $date->set($dateModified, Zend_Date::ISO_8601);

        }

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

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

    }

    /**

     * Get the entry description

     *

     * @return string

     */

    public function getDescription()

    {

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

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

        }

        $description = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:summary)');

        if (!$description) {

            $description = null;

        }

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

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

    }

    /**

     * Get the entry enclosure

     *

     * @return string

     */

    public function getEnclosure()

    {

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

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

        }

        $enclosure = null;

        $nodeList = $this->getXpath()->query($this->getXpathPrefix() . '/atom:link[@rel="enclosure"]');

        if ($nodeList->length > 0) {

            $enclosure = new stdClass();

            $enclosure->url    = $nodeList->item(0)->getAttribute('href');

            $enclosure->length = $nodeList->item(0)->getAttribute('length');

            $enclosure->type   = $nodeList->item(0)->getAttribute('type');

        }

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

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

    }

    /**

     * Get the entry ID

     *

     * @return string

     */

    public function getId()

    {

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

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

        }

        $id = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:id)');

        if (!$id) {

            if ($this->getPermalink()) {

                $id = $this->getPermalink();

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

                $id = $this->getTitle();

            } else {

                $id = null;

            }

        }

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

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

    }

    /**

     * Get the base URI of the feed (if set).

     *

     * @return string|null

     */

    public function getBaseUrl()

    {

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

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

        }

        $baseUrl = $this->getXpath()->evaluate('string('

            . $this->getXpathPrefix() . '/@xml:base[1]'

        . ')');

        if (!$baseUrl) {

            $baseUrl = $this->getXpath()->evaluate('string(//@xml:base[1])');

        }

        if (!$baseUrl) {

            $baseUrl = null;

        }

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

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

    }

    /**

     * Get a specific link

     *

     * @param  int $index

     * @return string

     */

    public function getLink($index = 0)

    {

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

            $this->getLinks();

        }

        if (isset($this->_data['links'][$index])) {

            return $this->_data['links'][$index];

        }

        return null;

    }

    /**

     * Get all links

     *

     * @return array

     */

    public function getLinks()

    {

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

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

        }

        $links = array();

        $list = $this->getXpath()->query(

            $this->getXpathPrefix() . '//atom:link[@rel="alternate"]/@href' . '|' .

            $this->getXpathPrefix() . '//atom:link[not(@rel)]/@href'

        );

        if ($list->length) {

            foreach ($list as $link) {

                $links[] = $this->_absolutiseUri($link->value);

            }

        }

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

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

    }

    /**

     * Get a permalink to the entry

     *

     * @return string

     */

    public function getPermalink()

    {

        return $this->getLink(0);

    }

    /**

     * Get the entry title

     *

     * @return string

     */

    public function getTitle()

    {

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

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

        }

        $title = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:title)');

        if (!$title) {

            $title = null;

        }

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

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

    }