<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  Copyright (C) 2005 - 2019 Open Source Matters, Inc. All rights reserved.
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\Document;

defined('JPATH_PLATFORM') or die;

use Joomla\CMS\Uri\Uri;

/**
 * Abstract class for a renderer
 *
 * @since  1.7.0
 */
class DocumentRenderer
{
	/**
	 * Reference to the Document object that instantiated the renderer
	 *
	 * @var    Document
	 * @since  1.7.0
	 */
	protected $_doc = null;

	/**
	 * Renderer mime type
	 *
	 * @var    string
	 * @since  1.7.0
	 */
	protected $_mime = 'text/html';

	/**
	 * Class constructor
	 *
	 * @param   Document  $doc  A reference to the Document object that instantiated the renderer
	 *
	 * @since   1.7.0
	 */
	public function __construct(Document $doc)
	{
		$this->_doc = $doc;
	}

	/**
	 * Renders a script and returns the results as a string
	 *
	 * @param   string  $name     The name of the element to render
	 * @param   array   $params   Array of values
	 * @param   string  $content  Override the output of the renderer
	 *
	 * @return  string  The output of the script
	 *
	 * @since   1.7.0
	 */
	public function render($name, $params = null, $content = null)
	{
	}

	/**
	 * Return the content type of the renderer
	 *
	 * @return  string  The contentType
	 *
	 * @since   1.7.0
	 */
	public function getContentType()
	{
		return $this->_mime;
	}

	/**
	 * Convert links in a text from relative to absolute
	 *
	 * @param   string  $text  The text processed
	 *
	 * @return  string   Text with converted links
	 *
	 * @since   1.7.0
	 */
	protected function _relToAbs($text)
	{
		$base = Uri::base();
		$text = preg_replace("/(href|src)=\"(?!http|ftp|https|mailto|data|\/\/)([^\"]*)\"/", "$1=\"$base\$2\"", $text);

		return $text;
	}
}