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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2011 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\Document;

\defined('JPATH_PLATFORM') or die;

use Joomla\CMS\Document\Opensearch\OpensearchImage;
use Joomla\CMS\Document\Opensearch\OpensearchUrl;
use Joomla\CMS\Factory;
use Joomla\CMS\Router\Route;
use Joomla\CMS\Uri\Uri;

/**
 * Opensearch class, provides an easy interface to display an Opensearch document
 *
 * @link   http://www.opensearch.org/
 * @since  1.7.0
 */
class OpensearchDocument extends Document
{
	/**
	 * ShortName element
	 *
	 * required
	 *
	 * @var    string
	 * @since  1.7.0
	 */
	private $_shortName = '';

/**
	 * Images collection
	 *
	 * optional
	 *
	 * @var    object
	 * @since  1.7.0
	 */
	private $_images = array();

/**
	 * The url collection
	 *
	 * @var    array
	 * @since  1.7.0
	 */
	private $_urls = array();

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

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

// Set mime type
		$this->_mime = 'application/opensearchdescription+xml';

// Add the URL for self updating
		$update = new OpensearchUrl;
		$update->type = 'application/opensearchdescription+xml';
		$update->rel = 'self';
		$update->template = Route::_(Uri::getInstance());
		$this->addUrl($update);

// Add the favicon as the default image
		// Try to find a favicon by checking the template and root folder
		$app = Factory::getApplication();
		$dirs = array(JPATH_THEMES . '/' . $app->getTemplate(), JPATH_BASE);

foreach ($dirs as $dir)
		{
			if (is_file($dir . '/favicon.ico'))
			{
				$path = str_replace(JPATH_BASE, '', $dir);
				$path = str_replace('\\', '/', $path);
				$favicon = new OpensearchImage;

if ($path == '')
				{
					$favicon->data = Uri::base() . 'favicon.ico';
				}
				else
				{
					if ($path[0] == '/')
					{
						$path = substr($path, 1);
					}

$favicon->data = Uri::base() . $path . '/favicon.ico';
				}

$favicon->height = '16';
				$favicon->width = '16';
				$favicon->type = 'image/vnd.microsoft.icon';

$this->addImage($favicon);

break;
			}
		}
	}

/**
	 * Render the document
	 *
	 * @param   boolean  $cache   If true, cache the output
	 * @param   array    $params  Associative array of attributes
	 *
	 * @return  string  The rendered data
	 *
	 * @since   1.7.0
	 */
	public function render($cache = false, $params = array())
	{
		$xml = new \DOMDocument('1.0', 'utf-8');

if (\defined('JDEBUG') && JDEBUG)
		{
			$xml->formatOutput = true;
		}

// The Opensearch Namespace
		$osns = 'http://a9.com/-/spec/opensearch/1.1/';

// Create the root element
		$elOs = $xml->createElementNS($osns, 'OpenSearchDescription');

$elShortName = $xml->createElementNS($osns, 'ShortName');
		$elShortName->appendChild($xml->createTextNode(htmlspecialchars($this->_shortName)));
		$elOs->appendChild($elShortName);

$elDescription = $xml->createElementNS($osns, 'Description');
		$elDescription->appendChild($xml->createTextNode(htmlspecialchars($this->description)));
		$elOs->appendChild($elDescription);

// Always set the accepted input encoding to UTF-8
		$elInputEncoding = $xml->createElementNS($osns, 'InputEncoding');
		$elInputEncoding->appendChild($xml->createTextNode('UTF-8'));
		$elOs->appendChild($elInputEncoding);

foreach ($this->_images as $image)
		{
			$elImage = $xml->createElementNS($osns, 'Image');
			$elImage->setAttribute('type', $image->type);
			$elImage->setAttribute('width', $image->width);
			$elImage->setAttribute('height', $image->height);
			$elImage->appendChild($xml->createTextNode(htmlspecialchars($image->data)));
			$elOs->appendChild($elImage);
		}

foreach ($this->_urls as $url)
		{
			$elUrl = $xml->createElementNS($osns, 'Url');
			$elUrl->setAttribute('type', $url->type);

// Results is the default value so we don't need to add it
			if ($url->rel !== 'results')
			{
				$elUrl->setAttribute('rel', $url->rel);
			}

$elUrl->setAttribute('template', $url->template);
			$elOs->appendChild($elUrl);
		}

$xml->appendChild($elOs);
		parent::render($cache, $params);

return $xml->saveXML();
	}

/**
	 * Sets the short name
	 *
	 * @param   string  $name  The name.
	 *
	 * @return  OpensearchDocument instance of $this to allow chaining
	 *
	 * @since   1.7.0
	 */
	public function setShortName($name)
	{
		$this->_shortName = $name;

return $this;
	}

/**
	 * Adds a URL to the Opensearch description.
	 *
	 * @param   OpensearchUrl  $url  The url to add to the description.
	 *
	 * @return  OpensearchDocument instance of $this to allow chaining
	 *
	 * @since   1.7.0
	 */
	public function addUrl(OpensearchUrl $url)
	{
		$this->_urls[] = $url;

return $this;
	}

/**
	 * Adds an image to the Opensearch description.
	 *
	 * @param   OpensearchImage  $image  The image to add to the description.
	 *
	 * @return  OpensearchDocument instance of $this to allow chaining
	 *
	 * @since   1.7.0
	 */
	public function addImage(OpensearchImage $image)
	{
		$this->_images[] = $image;

return $this;
	}
}