/home/edulekha/studygroup.edulekha.com/ow_plugins/questions/classes/groups_bridge.php
<?php

/**
 * This software is intended for use with Oxwall Free Community Software http://www.oxwall.org/ and is
 * licensed under The BSD license.

 * ---
 * Copyright (c) 2012, Sergey Kambalin
 * All rights reserved.

 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
 * following conditions are met:
 *
 *  - Redistributions of source code must retain the above copyright notice, this list of conditions and
 *  the following disclaimer.
 *
 *  - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
 *  the following disclaimer in the documentation and/or other materials provided with the distribution.
 *
 *  - Neither the name of the Oxwall Foundation nor the names of its contributors may be used to endorse or promote products
 *  derived from this software without specific prior written permission.

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/**
 * @author Sergey Kambalin <greyexpert@gmail.com>
 * @package questions.classes
 */
class QUESTIONS_CLASS_GroupsBridge
{
    /**
     * Singleton instance.
     *
     * @var QUESTIONS_CLASS_GroupsBridge
     */
    private static $classInstance;

    /**
     * Returns an instance of class (singleton pattern implementation).
     *
     * @return QUESTIONS_CLASS_GroupsBridge
     */
    public static function getInstance()
    {
        if ( self::$classInstance === null )
        {
            self::$classInstance = new self();
        }

        return self::$classInstance;
    }

    private function isActive()
    {
        return OW::getPluginManager()->isPluginActive('groups');
    }

    public function onCheckInteractPermission( OW_Event $event )
    {
        $params = $event->getParams();
        $data = $event->getData();

        $settings = $params['settings'];

        if ( empty($settings['context']['type']) || $settings['context']['type'] != 'groups' )
        {
            return;
        }

        if ( !OW::getUser()->isAuthenticated() )
        {
            return;
        }

        if ( !$this->isActive() )
        {
            return;
        }

        $groupId = (int) $settings['context']['id'];

        $event->setData( $data && GROUPS_BOL_Service::getInstance()->findUser($groupId, OW::getUser()->getId()) !== null );
    }

    public function onBeforeQuestionAdd( OW_Event $event )
    {
        $params = $event->getParams();
        $data = $event->getData();
        if ( empty($params['settings']['context']['type']) || $params['settings']['context']['type'] != 'groups' )
        {
            return;
        }

        if ( !$this->isActive() )
        {
            return;
        }

        $context = $params['settings']['context'];

        $service = GROUPS_BOL_Service::getInstance();

        $groupId = (int) $context['id'];
        $group = $service->findGroupById($groupId);
        $url = $service->getGroupUrl($group);
        $title = UTIL_String::truncate(strip_tags($group->title), 100, '...');

        $context['label'] = $title;
        $context['url'] = $url;

        $data['settings']['context'] = $context;
        $data['privacy'] = 'groups';

        $event->setData($data);
    }
}