<?php

/**

 * CmsBaseRenderer class file.

 * @author Christoffer Niska <christoffer.niska@nordsoftware.com>

 * @copyright Copyright &copy; 2011, Nord Software Ltd

 * @license http://www.opensource.org/licenses/bsd-license.php New BSD License

 * @package cms.components

 */



/**

 * Cms renderer base class. All renderers must be extended from this class.

 */

class CmsBaseRenderer extends CComponent

{

	protected $_patterns = array(

		'email'=>'/{{email:([\w\d!#$%&\'*+\\/=?^_`{|}~-]+(?:\.[\w\d!#$%&\'*+\\/=?^_`{|}~-]+)*@(?:[\w\d](?:[\w\d-]*[\w\d])?\.)+[\w\d](?:[\w\d-]*[\w\d])?)}}/i',

		'file'=>'/{{file:([\d]+)}}/i',

		'image'=>'/{{image:([\d]+)}}/i',

		'link'=>'/{{(#?[\w\d\._-]+|https?:\/\/[\w\d_-]*(\.[\w\d_-]*)+.*)\|([\w\d\s-]+)}}/i',

		'node'=>'/{{node:([\w\d\._-]+)}}/i',

		'url'=>'/{{url:([\w\d\._-]+)}}/i',

	);



	/**

	 * Renders a specific node.

	 * @param CmsNode $node the node to render

	 * @return string the rendered node

	 */

	public function render($node)

	{

		$heading = str_replace('{heading}', $node->heading, Yii::app()->cms->headingTemplate);

		$content = $this->renderHeading($heading, $node->body);

		$content = $this->renderURLs($content);

		$content = $this->renderLinks($content);

		$content = $this->renderEmails($content);

		$content = $this->renderImages($content);

		$content = $this->renderAttachments($content);

		$content = $this->renderNodes($content);

		return $content;

	}



	/**

	 * Renders a specific node as a widget.

	 * @param CmsNode $node the node to render

	 * @return string the rendered node

	 */

	public function renderWidget($node)

	{

		$heading = str_replace('{heading}', $node->heading, Yii::app()->cms->widgetHeadingTemplate);

		$content = $this->renderHeading($heading, $node->body);

		$content = $this->renderURLs($content);

		$content = $this->renderLinks($content);

		$content = $this->renderEmails($content);

		$content = $this->renderImages($content);

		$content = $this->renderAttachments($content);

		$content = $this->removeNodes($content); // widgets do not render inline nodes

		return $content;

	}



	/**

	 * Renders the heading.

	 * @param string $heading the heading to render

	 * @param string $content the content being rendered

	 * @return string the content

	 */

	protected function renderHeading($heading, $content)

	{

		return str_replace('{{heading}}', $heading, $content);

	}



	/**

	 * Renders nodes within the given content.

	 * @param string $content the content being rendered

	 * @return string the content

	 */

	protected function renderNodes($content)

	{

		$matches = array();

		preg_match_all($this->_patterns['node'], $content, $matches);



		$pairs = array();

		foreach ($matches[1] as $index => $name)

		{

			/** @var CmsNode $node */

			$node = Yii::app()->cms->loadNode($name);

			$pairs[$matches[0][$index]] = $node instanceof CmsNode && $node->level === CmsNode::LEVEL_BLOCK

					? $node->renderWidget() : '';

		}



		if (!empty($pairs))

			$content = strtr($content, $pairs);



		return $content;

	}



	/**

	 * Renders links within the given content.

	 * @param string $content the content being rendered

	 * @return string the content

	 */

	protected function renderLinks($content)

	{

		$matches = array();

		preg_match_all($this->_patterns['link'], $content, $matches);



		$pairs = array();

		foreach ($matches[1] as $index => $target)

		{

			// If the target doesn't include 'http' it's treated as an internal link.

			if (strpos($target, '#') !== 0 && strpos($target, 'http') === false)

			{

				/** @var Cms $cms */

				$cms = Yii::app()->cms;



				/** @var CmsNode $node */

				$node = $cms->loadNode($target);

				$target = $node instanceof CmsNode ? $node->getUrl() : '#';

			}



			$text = $matches[3][$index];

			$pairs[$matches[0][$index]] = CHtml::link($text, $target);

		}



		if (!empty($pairs))

			$content = strtr($content, $pairs);



		return $content;

	}



	/**

	 * Renders URLS within the given content.

	 * @param string $content the content being rendered

	 * @return string the content

	 */

	protected function renderURLs($content)

	{

		$matches = array();

		preg_match_all($this->_patterns['url'], $content, $matches);



		$pairs = array();

		foreach ($matches[1] as $index => $target)

		{

			// If the target doesn't include 'http' it's treated as an internal link.

			if (strpos($target, '#') !== 0 && strpos($target, 'http') === false)

			{

				/** @var Cms $cms */

				$cms = Yii::app()->cms;



				/** @var CmsNode $node */

				$node = $cms->loadNode($target);

				$target = $node !== null ? $node->getUrl() : '#';

			}



			$pairs[$matches[0][$index]] = $target;

		}



		if (!empty($pairs))

			$content = strtr($content, $pairs);



		return $content;

	}



	/**

	 * Renders emails within the given content.

	 * @param string $content the content being rendered

	 * @return string the content

	 */

	protected function renderEmails($content)

	{

		$matches = array();

		preg_match_all($this->_patterns['email'], $content, $matches);



		$pairs = array();

		foreach ($matches[1] as $index => $id)

		{

			$email = str_rot13($matches[1][$index]);

			$pairs[$matches[0][$index]] = CHtml::mailto($email, $email, array('class'=>'email', 'rel'=>'nofollow'));

		}



		if (!empty($pairs))

		{

			$content = strtr($content, $pairs);



			/** @var CClientScript $cs */

			$cs = Yii::app()->getClientScript();



			$assetsUrl = Yii::app()->cms->getAssetsUrl();

			$cs->registerScriptFile($assetsUrl.'/js/cms-rot13.js');

			$cs->registerScript(__CLASS__.'#'.uniqid(true, true).'_emailObfuscation', "

				(function($) {

					$('.email').each(function() {

						var element = $(this);



						if (!element.attr('data-decoded')) {

							var	href = $(this).attr('href'),

								address = Cms.Rot13.decode(href.substring(href.indexOf(':') + 1)),

								value = Cms.Rot13.decode($(this).text());



							element.attr('href', 'mailto:' + address);

							element.text(value);

							element.attr('data-decoded', 1);

						}

					});

				})(jQuery);

			");

		}



		return $content;

	}



	/**

	 * Renders images within the given content.

	 * @param string $content the content being rendered

	 * @return string the content

	 */

	protected function renderImages($content)

	{

		$matches = array();

		preg_match_all($this->_patterns['image'], $content, $matches);



		$pairs = array();

		foreach ($matches[1] as $index => $id)

		{

			/** @var CmsAttachment $attachment */

			$attachment = CmsAttachment::model()->findByPk($id);

			if ($attachment instanceof CmsAttachment && strpos($attachment->mimeType, 'image') !== false)

			{

				$url = $attachment->getUrl();

				$name = $attachment->resolveName();

				$pairs[$matches[0][$index]] = CHtml::image($url, $name);



			}

		}



		if (!empty($pairs) )

			$content = strtr($content, $pairs);



		return $content;

	}



	/**

	 * Renders attachments within this node.

	 * @param string $content the content being rendered

	 * @return string the content

	 */

	protected function renderAttachments($content)

	{

		$matches = array();

		preg_match_all($this->_patterns['file'], $content, $matches);



		$pairs = array();

		foreach ($matches[1] as $index => $id)

		{

			/** @var CmsAttachment $attachment */

			$attachment = CmsAttachment::model()->findByPk($id);

			if ($attachment instanceof CmsAttachment)

			{

				$url = $attachment->getUrl();

				$name = $attachment->resolveName();

				$pairs[$matches[0][$index]] = CHtml::link($name, $url);

			}

		}



		if (!empty($pairs))

			$content = strtr($content, $pairs);



		return $content;

	}



	/**

	 * Removes the node tags within the given content.

	 * @param string $content the content being rendered

	 * @return string the content

	 */

	public function removeNodes($content)

	{

		return preg_replace($this->_patterns['node'], '', $content);

	}

}