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<?php

/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2006 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\Document;

use Joomla\CMS\Document\Feed\FeedImage;
use Joomla\CMS\Document\Feed\FeedItem;
use Joomla\CMS\Factory as CmsFactory;
use Joomla\CMS\Language\Text;

// phpcs:disable PSR1.Files.SideEffects
\defined('JPATH_PLATFORM') or die;
// phpcs:enable PSR1.Files.SideEffects

/**
 * FeedDocument class, provides an easy interface to parse and display any feed document
 *
 * @since  1.7.0
 */
class FeedDocument extends Document
{
    /**
     * Syndication URL feed element
     *
     * optional
     *
     * @var    string
     * @since  1.7.0
     */
    public $syndicationURL = '';

    /**
     * Image feed element
     *
     * optional
     *
     * @var    FeedImage
     * @since  1.7.0
     */
    public $image = null;

    /**
     * Copyright feed element
     *
     * optional
     *
     * @var    string
     * @since  1.7.0
     */
    public $copyright = '';

    /**
     * Published date feed element
     *
     * optional
     *
     * @var    string
     * @since  1.7.0
     */
    public $pubDate = '';

    /**
     * Lastbuild date feed element
     *
     * @var    \Joomla\CMS\Date\Date
     * @since  1.7.0
     */
    public $lastBuildDate;

    /**
     * Editor feed element
     *
     * optional
     *
     * @var    string
     * @since  1.7.0
     */
    public $editor = '';

    /**
     * Docs feed element
     *
     * @var    string
     * @since  1.7.0
     */
    public $docs = '';

    /**
     * Editor email feed element
     *
     * optional
     *
     * @var    string
     * @since  1.7.0
     */
    public $editorEmail = '';

    /**
     * Webmaster email feed element
     *
     * optional
     *
     * @var    string
     * @since  1.7.0
     */
    public $webmaster = '';

    /**
     * Category feed element
     *
     * optional
     *
     * @var    string
     * @since  1.7.0
     */
    public $category = '';

    /**
     * TTL feed attribute
     *
     * optional
     *
     * @var    string
     * @since  1.7.0
     */
    public $ttl = '';

    /**
     * Rating feed element
     *
     * optional
     *
     * @var    string
     * @since  1.7.0
     */
    public $rating = '';

    /**
     * Skiphours feed element
     *
     * optional
     *
     * @var    string
     * @since  1.7.0
     */
    public $skipHours = '';

    /**
     * Skipdays feed element
     *
     * optional
     *
     * @var    string
     * @since  1.7.0
     */
    public $skipDays = '';

    /**
     * The feed items collection
     *
     * @var    FeedItem[]
     * @since  1.7.0
     */
    public $items = [];

    /**
     * Class constructor
     *
     * @param   array  $options  Associative array of options
     *
     * @since  1.7.0
     */
    public function __construct($options = [])
    {
        parent::__construct($options);

        // Set document type
        $this->_type = 'feed';

        // Gets and sets timezone offset from site configuration
        $this->lastBuildDate = CmsFactory::getDate();
        $this->lastBuildDate->setTimezone(new \DateTimeZone(CmsFactory::getApplication()->get('offset', 'UTC')));
    }

    /**
     * Render the document
     *
     * @param   boolean  $cache   If true, cache the output
     * @param   array    $params  Associative array of attributes
     *
     * @return  string The rendered data
     *
     * @since   1.7.0
     * @throws  \Exception
     * @todo    Make this cacheable
     */
    public function render($cache = false, $params = [])
    {
        // Get the feed type
        $type = CmsFactory::getApplication()->getInput()->get('type', 'rss');

        // Instantiate feed renderer and set the mime encoding
        $renderer = $this->loadRenderer($type ?: 'rss');

        if (!($renderer instanceof DocumentRenderer)) {
            throw new \Exception(Text::_('JGLOBAL_RESOURCE_NOT_FOUND'), 404);
        }

        $this->setMimeEncoding($renderer->getContentType());

        // Output
        // Generate prolog
        $data = "<?xml version=\"1.0\" encoding=\"" . $this->_charset . "\"?>\n";
        $data .= "<!-- generator=\"" . $this->getGenerator() . "\" -->\n";

        // Generate stylesheet links
        foreach ($this->_styleSheets as $src => $attr) {
            $data .= "<?xml-stylesheet href=\"$src\" type=\"" . $attr['type'] . "\"?>\n";
        }

        // Render the feed
        $data .= $renderer->render();

        parent::render($cache, $params);

        return $data;
    }

    /**
     * Adds a FeedItem to the feed.
     *
     * @param   FeedItem  $item  The feeditem to add to the feed.
     *
     * @return  FeedDocument  instance of $this to allow chaining
     *
     * @since   1.7.0
     */
    public function addItem(FeedItem $item)
    {
        $item->source  = $this->link;
        $this->items[] = $item;

        return $this;
    }
}