<?php
/**
 * Document Description
 *
 * Document Long Description
 *
 * PHP4/5
 *
 * Created on Jul 21, 2008
 *
 * @package   package_name
 * @author    Your Name <author@toowoombarc.qld.gov.au>
 * @author    Toowoomba Regional Council Information Management Branch
 * @license   GNU/GPL http://www.gnu.org/licenses/gpl.html
 * @copyright 2008 Toowoomba Regional Council/Developer Name
 * @version   SVN: $Id: alpha.scriptfile.php 16235 2010-04-20 04:13:25Z pasamio $
 * @see       http://joomlacode.org/gf/project/    JoomlaCode Project:
 */

class Mod_RokNavMenuInstallerScript
{

	public function install($parent)
	{
		if ($this->checkForExtender()) $this->registerExtenderPlugin($parent);
		$this->clearCache();
		return true;
	}

	public function update($parent)
	{
		if ($this->checkForExtender()) $this->registerExtenderPlugin($parent);
		$this->clearCache();
		return true;
	}

	public function uninstall($parent)
	{
		if ($this->checkForExtender()) $this->unregisterExtenderPlugin($parent);
	}

	public function preflight($type, $parent)
	{

	}

	/**
	 * @return bool
	 */
	protected function checkForExtender()
	{
		// if the class exists and is loaded just return
		if (class_exists('plgSystemRokExtender')) return true;
		$plugin_path = JPATH_ROOT . '/plugins/system/rokextender/rokextender.php';

		// if the plugin isnt installed
		if (!file_exists($plugin_path) || !is_file($plugin_path)) return false;

		require_once($plugin_path);

		if (!class_exists('plgSystemRokExtender')) {
			//TODO: add error message output
			return false;
		}
		return true;
	}

	protected function registerExtenderPlugin($parent)
	{
		$manifest = $parent->getParent()->getManifest();
		$basepath = str_replace(JPATH_ROOT, '', $parent->getParent()->getPath('extension_root'));

		foreach ($manifest->plugins->plugin as $plugin) {
			plgSystemRokExtender::registerExtenderPlugin($basepath . (string)$plugin);
		}
	}

	protected function unregisterExtenderPlugin($parent)
	{
		$manifest = $parent->getParent()->getManifest();
		$basepath = str_replace(JPATH_ROOT, '', $parent->getParent()->getPath('extension_root'));

		foreach ($manifest->plugins->plugin as $plugin) {
			plgSystemRokExtender::registerExtenderPlugin($basepath . (string)$plugin);
		}
	}

	protected function clearCache()
	{
		$conf = JFactory::getConfig();
		$options = array(
					'cachebase' => $conf->get('cache_path', JPATH_SITE.'/cache'));
		$cache = $cache = JCache::getInstance('callback', $options);

		$cache->clean('mod_roknavmenu');
	}
}