<?php

/**
 * @copyright (C) 2013 iJoomla, Inc. - All rights reserved.
 * @license GNU General Public License, version 2 (http://www.gnu.org/licenses/gpl-2.0.html)
 * @author iJoomla.com <webmaster@ijoomla.com>
 * @url https://www.jomsocial.com/license-agreement
 * The PHP code portions are distributed under the GPL license. If not otherwise stated, all images, manuals, cascading style sheets, and included JavaScript *are NOT GPL, and are released under the IJOOMLA Proprietary Use License v1.0
 * More info at https://www.jomsocial.com/license-agreement
 */

use Joomla\CMS\Factory;
use Joomla\CMS\Filesystem\File;
use Joomla\CMS\Language\Text;
use Joomla\CMS\Plugin\PluginHelper;
use Joomla\CMS\Table\Table;

// no direct access
defined('_JEXEC') or die('Restricted access');

require_once(JPATH_ROOT . '/components/com_community/libraries/core.php');

class CAppPlugins extends cobject
{
	var $name;
	var $triggerCount = 0;

	public function __construct($name)
	{
		$this->name = $name;
		parent::__construct($name);
	}

	private function CAppPlugins($name)
	{
		$this->__construct($name);
	}

	public static function &getInstance()
	{
		static $instance;
		if (!$instance) {
			$instance = new CAppPlugins('CAppPlugins');
		}
		return $instance;
	}

	public function getPlugin($appName)
	{
		return $this->_getPlgFromDispatcher($appName);
	}

	/**
	 * Used to include specific applications that are enabled on specific users.
	 * So that the page will be optimized because files will not be included.
	 **/
	public function loadApplications()
	{
		static $loaded = false;
		// Although JPluginHelper will load it only once, we need to track it to
		// enable a trigger to our plugins
		if (!$loaded) {
			PluginHelper::importPlugin('community');
			$this->triggerEvent('onAfterAppsLoad', null);
		}
		return true;
	}


	public function _getPlgFromDispatcher($appName)
	{
		$dispatcher =  CDispatcher::getInstanceStatic();
		$observers = $dispatcher->getObservers();
		foreach ($observers as $key => $val) {
			$obj = $observers[$key];
			if (is_object($obj)) {
				//wrapper object to access protected properties
				$plgObjWrapper = new CPluginWrapper($obj);
				if ((CStringHelper::strtolower($plgObjWrapper->getPluginName()) == CStringHelper::strtolower($appName))
					&& $plgObjWrapper->getPluginType() == 'community'
				) {

					return $obj;
				}
			}
		}

		return null;
	}

	/**
	 * @note to dev, internal use only. Subject to change in future revison
	 */
	public function renderPlugin($plgObj, $userid)
	{
		//wrapper for JPlugin to access protected properties
		$plgObjWrapper = new CPluginWrapper($plgObj);
		$arrayParams = null;

		$appsModel 	= CFactory::getModel('apps');
		$user = CFactory::getUser($userid);

		$app	= Table::getInstance('App', 'CTable');
		$app->loadUserApp($userid, $plgObjWrapper->getPluginName());

		$core			= $plgObj->params->get('coreapp', 0);

		// Format the applications with proper heading
		$obj			= new stdclass();
		$obj->title		= Text::_($appsModel->getAppTitle($plgObjWrapper->getPluginName()));
		$obj->name		= $plgObjWrapper->getPluginName();
		$obj->data		= $plgObj->onProfileDisplay($arrayParams);
		$obj->core		= false;

		if ($core) {
			$obj->position	= $plgObj->params->get('position', 'content');
		} else {
			$obj->position	= !empty($app->position) ? $app->position : $plgObj->params->get('position', 'content');
		}

		$obj->id		= !empty($app->id) ? $app->id : 0;
		$obj->hasConfig	= $appsModel->hasConfig($plgObjWrapper->getPluginName());

		return $obj;
	}

	/**
	 * Trigger a single plugin, support only onProfileDisplay for now
	 * @note to dev, internal use only. Subject to change in future revison
	 */
	public function triggerPlugin($triggerName, $pluginName, $userid)
	{
		$dispatcher =  CDispatcher::getInstanceStatic();
		$observers = $dispatcher->getObservers();
		// Load Core applications
		for ($i = 0; $i < count($observers); $i++) {
			$plgObj = $observers[$i];
			if (is_object($plgObj)) {
				//wrapper object to access protected properties
				$plgObjWrapper = new CPluginWrapper($plgObj);

				if (
					$plgObjWrapper->getPluginType() == 'community'
					&& ($plgObj->params != null)
					&& method_exists($plgObj, $triggerName)
					&& ($plgObjWrapper->getPluginName() == $pluginName)
				) {
					$obj = $this->renderPlugin($plgObj, $userid);
					return $obj;
				}
			}
		}
	}

	/**
	 * Used to trigger profile display event
	 * @param	string	eventName (will always be 'onProfileDisplay')
	 * @param	array	params to pass to the function
	 *
	 * returns	array of content string
	 **/
	public function _triggerOnProfileDisplay($event = 'onProfileDisplay')
	{
		$mainframe  = Factory::getApplication();
		$dispatcher =  CDispatcher::getInstanceStatic();
		$observers = $dispatcher->getObservers();
		$content = '';
		$jinput = Factory::getApplication()->input;

		$arrayParams = null;

		// @todo: Fix ordering so we only load according to user ordering or site wide plugin ordering.
		// as we cannot use the mainframe to trigger because all the data are already outputed, no way to manipulate it.
		if ($event == 'onProfileDisplay') {
			$appsModel = CFactory::getModel('apps');

			// Get the current viewed user
			$userid			= $jinput->getInt('userid', '');
			$user			= CFactory::getUser($userid);
			$applications	= $appsModel->getUserApps($user->id);

			// Just in case the apps are returning data to the view, we need to return them
			$content		= array();

			// Load Core applications
			for ($i = 0; $i < count($observers); $i++) {
				$plgObj = $observers[$i];
				if (is_object($plgObj)) {
					$plgObjWrapper = new CPluginWrapper($plgObj);
					if (
						$plgObjWrapper->getPluginType() == 'community'
						&& ($plgObj->params != null)
						&& ($plgObj->params->get('coreapp', 0) == 1)
						&& method_exists($plgObj, 'onProfileDisplay')
					) {

						// Need to skip 'walls' plugin for 2.2 upwards
						if ($plgObjWrapper->getPluginName() != 'walls') {
							$obj = $this->renderPlugin($plgObj, $userid);
							$obj->core = true;
							$content[] = $obj;
						}
					}
				}
			}

			// Load user application
			$appCount = count($applications);
			for ($i = 0; $i < $appCount; $i++) {
				$application =  $applications[$i];
				$plgObj 	 = $this->_getPlgFromDispatcher($application->apps);
				$plgObjWrapper = new CPluginWrapper($plgObj);
				// Don't load core apps
				if ($plgObj != null && $plgObj->params->get('coreapp', 0) != 1) {
					// Don't load core applications
					if (method_exists($plgObj, 'onProfileDisplay')) {
						// Need to skip 'walls' plugin for 2.2 upwards
						if ($plgObjWrapper->getPluginName() != 'walls') {
							$content[] = $this->renderPlugin($plgObj, $userid);
						}
					}
				}
			}
		}

		return $content;
	}

	/**
	 * Used to trigger onFormDisplay event trigger.
	 * @param	string	eventName (will always be 'onFormDisplay')
	 * @param	array	params to pass to the function
	 *
	 * returns	Array	result	An array of CFormElement objects.
	 **/
	public function _triggerOnFormDisplay($event, $arrayParams)
	{
		$dispatcher	= CDispatcher::getInstanceStatic();
		$observers = $dispatcher->getObservers();
		$systemObj	= new CEventTrigger();
		$result		= call_user_func_array(array(&$systemObj, $event), $arrayParams);
		$result		= is_null($result) ? array() : $result;

		for ($i = 0; $i < count($observers); $i++) {
			$plgObj = $observers[$i];
			if (is_object($plgObj)) {
				$plgObjWrapper = new CPluginWrapper($plgObj);
				if ($plgObjWrapper->getPluginType() == 'community' && method_exists($plgObj, $event)) {
					$content = call_user_func_array(array(&$plgObj, $event), $arrayParams);

					// Merge it to flatten the layers.
					if (is_array($content)) {
						$result	= array_merge($result, $content);
					}
				}
			}
		}

		return $result;
	}

	/**
	 * Used to trigger applications
	 * @param	string	eventName
	 * @param	array	params to pass to the function
	 * @param	bool	do we need to use custom user ordering ?
	 *
	 * returns	Array	An array of object that the caller can then manipulate later.
	 **/
	public function triggerEvent($event, $arrayParams = null, $needOrdering = false)
	{
		$mainframe	= Factory::getApplication();
		$dispatcher	= CDispatcher::getInstanceStatic();
		$content	= array();

		// Avoid problem with php 5.3
		if (is_null($arrayParams)) {
			$arrayParams = array();
		}

		// @todo: Fix ordering so we only load according to user ordering or site wide plugin ordering.
		// as we cannot use the mainframe to trigger because all the data are already outputed, no way to manipulate it.
		switch ($event) {
			case 'onProfileDisplay':
				$content	= $this->_triggerOnProfileDisplay($event);
				break;
			case 'onAllFieldsLoad':
				$content = $this->_triggerAllFieldsLoad($event, $arrayParams);
				break;
			case 'onFormDisplay':
				// We need to merge the arrays
				$content	= $this->_triggerOnFormDisplay($event, $arrayParams);
				break;
			case 'onProfileFieldLoad':
				$content	= $this->_triggerOnProfileFieldLoad($arrayParams);
				break;
			default:
				// Trigger system events
				$systemObj = new CEventTrigger();
				call_user_func_array(array(&$systemObj, $event), $arrayParams);
				$observers = $dispatcher->getObservers();
				//$dispatcher->trigger( $event , $arrayParams );
				for ($i = 0; $i < count($observers); $i++) {
					$plgObj = $observers[$i];
					if (is_object($plgObj)) {
						$plgObjWrapper = new CPluginWrapper($plgObj);
						if (
							$plgObjWrapper->getPluginType() == 'community'
							&& method_exists($plgObj, $event)
							&& ($plgObjWrapper->getPluginName() != 'input')
						) {
							// Format the applications with proper heading


							// Trigger external apps
							$content[] = call_user_func_array(array(&$plgObj, $event), $arrayParams);
						}
					}
				}

				break;
		}

		$this->triggerCount++;
		return $content;
	}

	/**
	 * Method to include the ajax function names
	 **/
	static public function loadAjaxPlugins()
	{
		//@todo: need to fetch plugins from database.
		$mainframe	= Factory::getApplication();
		$jinput 	= $mainframe->input;

		$ajaxCall	= $jinput->get('func', NULL, 'STRING');

		$func		= explode(',', $ajaxCall);

		// We expect the second argument is the plugin name so we use it as the plugin name.
		$func		= CStringHelper::trim($func[1]);

		$jaxFile	= JPATH_PLUGINS . '/community' . '/' . $func . '/jax.' . $func . '.php';

		//possible plugin path in Joomla 1.6
		$jaxFile16	= JPATH_PLUGINS . '/community' . '/' . $func . '/' . $func . '/jax.' . $func . '.php';

		jimport('joomla.filesystem.file');
		// Ajax file definitions should all be in JOOMLA/plugins/community/APPLICATION/jax.APPLICATION.php
		if (File::exists($jaxFile)) {
			require_once($jaxFile);
		} else if (File::exists($jaxFile16)) {
			require_once($jaxFile16);
		} else {
			// @todo: log any plugin not exists for debugging purposes?
		}
	}
	/**
	 * Calls the plugins AJAX methods
	 *
	 * @param none
	 **/
	public function ajax()
	{
	}

	/**
	 * Return the plugin object
	 * @param	string	app name
	 * @param	int		unique app id, unique per user
	 */
	public function get($pluginsName, $id = null)
	{
		static $pluginInstances;

		if (!$pluginInstances) {
			$pluginInstances = array();
		}

		if (empty($pluginsName)) {
			$appModel = CFactory::getModel('apps');
			$pluginsName = $appModel->getAppName($id);
		}

		if (!isset($pluginInstances[$pluginsName . $id])) {
			// Load applications since this is an ajax request, we need to load them.
			$this->loadApplications();

			// Try to get the plugin from the dispatcher
			$plg		= $this->_getPlgFromDispatcher($pluginsName);

			$pluginInstances[$pluginsName . $id]	= $plg;
		}
		return $pluginInstances[$pluginsName . $id];
	}

	/**
	 *
	 */
	public function showAbout($appName)
	{
		$app	= CFactory::getModel('apps');
		$appObj = $app->getAppInfo($appName);

		// Load application language so that JText can properly translate it.
		CAppPlugins::loadLanguage('plg_' . $appObj->name, JPATH_ADMINISTRATOR);

		// Trim out tab's in xml files.
		$appObj->description	= CStringHelper::trim($appObj->description);

		$tmpl	=   new CTemplate();
		return $tmpl->set('app', $appObj)
			->fetch('apps.about');
	}

	/**
	 *
	 */
	public function removeApp($userid, $appName)
	{
		$app = CFactory::getModel('apps');
		$html = $app->deleteApp($userid, $appName);
		return;
	}

	/*
	 * Retrieves HTML output for privacy settings
	 */
	public function showPrivacy($appName)
	{
		$app	= CFactory::getModel('apps');
		$my		= Factory::getUser();

		$selected	= $app->getPrivacy($my->id, $appName);

		$showCheck0 = ($selected == 0) ? ' checked="checked"' : '';
		$showCheck1 = ($selected == 10) ? ' checked="checked"' : '';
		$showCheck2 = ($selected == 20) ? ' checked="checked"' : '';

		$tmpl	=   new CTemplate();
		return	$tmpl->set('showCheck0', $showCheck0)
			->set('showCheck1', $showCheck1)
			->set('showCheck2', $showCheck2)
			->set('appName', $appName)
			->fetch('apps.privacy');
	}

	/**
	 * Get config html from the xml file
	 */
	public function showConfig($pluginsName, $params = array())
	{
	}


	/**
	 * Load and return the $param object for the given plugin
	 */
	public function loadConfig($pluginsName, $params = array())
	{
	}

	/**
	 * Return true if the apps is already installed by the  given user
	 */
	public function isInstalled($userid, $appname)
	{
		$app = CFactory::getModel('apps');
	}

	public function loadLanguage($extension = '', $basePath = JPATH_ADMINISTRATOR)
	{
		if (empty($extension)) {
			return false;
		}
		return Factory::getLanguage()->load(strtolower($extension), $basePath, null, false, false);
	}

	public function _triggerOnProfileFieldLoad($arrayParams  = array())
	{
		$event = 'onProfileFieldLoad';
		$dispatcher	= CDispatcher::getInstanceStatic();
		$observers = $dispatcher->getObservers();

		$result = $arrayParams[1];
		for ($i = 0; $i < count($observers); $i++) {
			$plgObj = $observers[$i];
			if (is_object($plgObj)) {
				$plgObjWrapper = new CPluginWrapper($plgObj);
				if ($plgObjWrapper->getPluginType() == 'community' && method_exists($plgObj, $event)) {
					$content = call_user_func_array(array(&$plgObj, $event), $arrayParams);

					$removePublishedArr = array(); //if published is set to 0 via plugin, lets remove the field
					// remove identical field
					if (is_array($content)) {
						//do not have two identical field
						$fieldName = array();
						foreach ($content as $key => $field) {
							if ($field['published'] == 0) {
								unset($content[$key]);
								$removePublishedArr[] = $field['id'];
								continue;
							}

							$fieldName[] = $field['name'];
						}

						foreach ($result as $key => $field) {
							if (in_array($field['id'], $removePublishedArr)) {
								unset($result[$key]);
							}

							if (in_array($field['name'], $fieldName)) {
								unset($result[$key]); // remove the identical field from the actual result
							}
						}

						// Merge it to flatten the layers.
						$result	= array_merge($result, $content);
					}
				}
			}
		}

		return $result;
	}

	public function _triggerAllFieldsLoad($event, $arrayParams)
	{
		$dispatcher	= CDispatcher::getInstanceStatic();
		$observers = $dispatcher->getObservers();
		$result		= $arrayParams[0];

		for ($i = 0; $i < count($observers); $i++) {
			$plgObj = $observers[$i];
			if (is_object($plgObj)) {
				$plgObjWrapper = new CPluginWrapper($plgObj);
				if ($plgObjWrapper->getPluginType() == 'community' && method_exists($plgObj, $event)) {
					$content = call_user_func_array(array(&$plgObj, $event), $arrayParams);

					// Merge it to flatten the layers.
					if (is_array($content)) {
						$result	= array_merge($result, $content);
					}
				}
			}
		}

		return $result;
	}
}