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

defined('_JEXEC') or die;

use Joomla\CMS\Factory;
use Joomla\CMS\Helper\ModuleHelper;
use Joomla\CMS\Plugin\CMSPlugin;

/**
 * Plugin to enable loading modules into content (e.g. articles)
 * This uses the {loadmodule} syntax
 *
 * @since  1.5
 */
class PlgContentLoadmodule extends CMSPlugin
{
	protected static $modules = array();

protected static $mods = array();

/**
	 * Plugin that loads module positions within content
	 *
	 * @param   string   $context   The context of the content being passed to the plugin.
	 * @param   object   &$article  The article object.  Note $article->text is also available
	 * @param   mixed    &$params   The article params
	 * @param   integer  $page      The 'page' number
	 *
	 * @return  void
	 *
	 * @since   1.6
	 */
	public function onContentPrepare($context, &$article, &$params, $page = 0)
	{
		// Don't run this plugin when the content is being indexed
		if ($context === 'com_finder.indexer')
		{
			return;
		}

// Simple performance check to determine whether bot should process further
		if (strpos($article->text, 'loadposition') === false && strpos($article->text, 'loadmodule') === false)
		{
			return;
		}

// Expression to search for (positions)
		$regex = '/{loadposition\s(.*?)}/i';
		$style = $this->params->def('style', 'none');

// Expression to search for(modules)
		$regexmod = '/{loadmodule\s(.*?)}/i';
		$stylemod = $this->params->def('style', 'none');

// Expression to search for(id)
		$regexmodid = '/{loadmoduleid\s([1-9][0-9]*)}/i';

// Find all instances of plugin and put in $matches for loadposition
		// $matches[0] is full pattern match, $matches[1] is the position
		preg_match_all($regex, $article->text, $matches, PREG_SET_ORDER);

// No matches, skip this
		if ($matches)
		{
			foreach ($matches as $match)
			{
				$matcheslist = explode(',', $match[1]);

// We may not have a module style so fall back to the plugin default.
				if (!array_key_exists(1, $matcheslist))
				{
					$matcheslist[1] = $style;
				}

$position = trim($matcheslist[0]);
				$style    = trim($matcheslist[1]);

$output = $this->_load($position, $style);

// We should replace only first occurrence in order to allow positions with the same name to regenerate their content:
				if (($start = strpos($article->text, $match[0])) !== false)
				{
					$article->text = substr_replace($article->text, $output, $start, strlen($match[0]));
				}

$style = $this->params->def('style', 'none');
			}
		}

// Find all instances of plugin and put in $matchesmod for loadmodule
		preg_match_all($regexmod, $article->text, $matchesmod, PREG_SET_ORDER);

// If no matches, skip this
		if ($matchesmod)
		{
			foreach ($matchesmod as $matchmod)
			{
				$matchesmodlist = explode(',', $matchmod[1]);

// We may not have a specific module so set to null
				if (!array_key_exists(1, $matchesmodlist))
				{
					$matchesmodlist[1] = null;
				}

// We may not have a module style so fall back to the plugin default.
				if (!array_key_exists(2, $matchesmodlist))
				{
					$matchesmodlist[2] = $stylemod;
				}

$module = trim($matchesmodlist[0]);
				$name   = htmlspecialchars_decode(trim($matchesmodlist[1]));
				$stylemod  = trim($matchesmodlist[2]);

// $match[0] is full pattern match, $match[1] is the module,$match[2] is the title
				$output = $this->_loadmod($module, $name, $stylemod);

// We should replace only first occurrence in order to allow positions with the same name to regenerate their content:
				if (($start = strpos($article->text, $matchmod[0])) !== false)
				{
					$article->text = substr_replace($article->text, $output, $start, strlen($matchmod[0]));
				}

$stylemod = $this->params->def('style', 'none');
			}
		}

// Find all instances of plugin and put in $matchesmodid for loadmoduleid
		preg_match_all($regexmodid, $article->text, $matchesmodid, PREG_SET_ORDER);

// If no matches, skip this
		if ($matchesmodid)
		{
			foreach ($matchesmodid as $match)
			{
				$id     = trim($match[1]);
				$output = $this->_loadid($id);

$style = $this->params->def('style', 'none');
			}
		}
	}

/**
	 * Loads and renders the module
	 *
	 * @param   string  $position  The position assigned to the module
	 * @param   string  $style     The style assigned to the module
	 *
	 * @return  mixed
	 *
	 * @since   1.6
	 */
	protected function _load($position, $style = 'none')
	{
		self::$modules[$position] = '';
		$document = Factory::getDocument();
		$renderer = $document->loadRenderer('module');
		$modules  = ModuleHelper::getModules($position);
		$params   = array('style' => $style);
		ob_start();

foreach ($modules as $module)
		{
			echo $renderer->render($module, $params);
		}

self::$modules[$position] = ob_get_clean();

return self::$modules[$position];
	}

/**
	 * This is always going to get the first instance of the module type unless
	 * there is a title.
	 *
	 * @param   string  $module  The module title
	 * @param   string  $title   The title of the module
	 * @param   string  $style   The style of the module
	 *
	 * @return  mixed
	 *
	 * @since   1.6
	 */
	protected function _loadmod($module, $title, $style = 'none')
	{
		self::$mods[$module] = '';
		$document = Factory::getDocument();
		$renderer = $document->loadRenderer('module');
		$mod      = ModuleHelper::getModule($module, $title);

// If the module without the mod_ isn't found, try it with mod_.
		// This allows people to enter it either way in the content
		if (!isset($mod))
		{
			$name = 'mod_' . $module;
			$mod  = ModuleHelper::getModule($name, $title);
		}

$params = array('style' => $style);
		ob_start();

if ($mod->id)
		{
			echo $renderer->render($mod, $params);
		}

self::$mods[$module] = ob_get_clean();

return self::$mods[$module];
	}

/**
	 * Loads and renders the module
	 *
	 * @param   string  $id  The id of the module
	 *
	 * @return  mixed
	 *
	 * @since   3.9.0
	 */
	protected function _loadid($id)
	{
		self::$modules[$id] = '';
		$document = Factory::getDocument();
		$renderer = $document->loadRenderer('module');
		$modules  = ModuleHelper::getModuleById($id);
		$params   = array('style' => 'none');
		ob_start();

if ($modules->id > 0)
		{
			echo $renderer->render($modules, $params);
		}

self::$modules[$id] = ob_get_clean();

return self::$modules[$id];
	}
}