class.ilECSCommunityReader.php

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<?php
/*
        +-----------------------------------------------------------------------------+
        | ILIAS open source                                                           |
        +-----------------------------------------------------------------------------+
        | Copyright (c) 1998-2006 ILIAS open source, University of Cologne            |
        |                                                                             |
        | This program is free software; you can redistribute it and/or               |
        | modify it under the terms of the GNU General Public License                 |
        | as published by the Free Software Foundation; either version 2              |
        | of the License, or (at your option) any later version.                      |
        |                                                                             |
        | This program is distributed in the hope that it will be useful,             |
        | but WITHOUT ANY WARRANTY; without even the implied warranty of              |
        | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               |
        | GNU General Public License for more details.                                |
        |                                                                             |
        | You should have received a copy of the GNU General Public License           |
        | along with this program; if not, write to the Free Software                 |
        | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. |
        +-----------------------------------------------------------------------------+
*/


class ilECSCommunityReader
{
        private static $instances = null;

        protected $position = 0;

        protected $log;
        protected $settings = null;
        protected $connector = null;
        
        protected $communities = array();
        protected $participants = array();
        protected $own_ids = array();

        private function __construct(ilECSSetting $setting = null)
        {
                global $ilLog;
                
                include_once('Services/WebServices/ECS/classes/class.ilECSSetting.php');
                include_once('Services/WebServices/ECS/classes/class.ilECSConnector.php');
                include_once('Services/WebServices/ECS/classes/class.ilECSConnectorException.php');
                include_once('Services/WebServices/ECS/classes/class.ilECSCommunity.php');

                if($setting)
                {
                        $this->settings = $setting;
                }
                else
                {
                        $GLOBALS['ilLog']->write(__METHOD__.': Using deprecated call');
                        $GLOBALS['ilLog']->logStack();
                }
                $this->connector = new ilECSConnector($this->settings);
                $this->log = $ilLog;
                
                $this->read();
        }
        
        public static function _getInstance()
        {
                $GLOBALS['ilLog']->write(__METHOD__.': Using deprecated call');
                return self::getInstanceByServerId(15);
        }

        public static function getInstanceByServerId($a_server_id)
        {
                if(isset(self::$instances[$a_server_id]))
                {
                        return self::$instances[$a_server_id];
                }
                return self::$instances[$a_server_id] = new ilECSCommunityReader(ilECSSetting::getInstanceByServerId($a_server_id));
        }

        public function getServer()
        {
                return $this->settings;
        }


        public function getOwnMIDs()
        {
                return $this->own_ids ? $this->own_ids : array();
        }
        
        public function getCommunities()
        {
                return $this->communities ? $this->communities : array();
        }
        
        public function getCommunityById($a_id)
        {
                foreach($this->communities as $community)
                {
                        if($community->getId() == $a_id)
                        {
                                return $community;
                        }
                }
                return null;
        }
        
        public function getParticipantByMID($a_mid)
        {
                return isset($this->participants[$a_mid]) ? $this->participants[$a_mid] : false;
        }

        public function getCommunityByMID($a_mid)
        {
                foreach($this->communities as $community)
                {
                        foreach($community->getParticipants() as $part)
                        {
                                if($part->getMID() == $a_mid)
                                {
                                        return $community;
                                }
                        }
                }
                return null;
        }
        
        public function getPublishableParticipants()
        {
                foreach($this->getCommunities() as $community)
                {
                        foreach($community->getParticipants() as $participant)
                        {
                                if($participant->isPublishable())
                                {
                                        $p_part[] = $participant;
                                }
                        }
                }
                return $p_part ? $p_part : array();
        }
        
        public function getEnabledParticipants()
        {
                include_once './Services/WebServices/ECS/classes/class.ilECSParticipantSettings.php';
                $ps = ilECSParticipantSettings::getInstanceByServerId($this->getServer()->getServerId());
                $en = $ps->getEnabledParticipants();
                foreach($this->getCommunities() as $community)
                {
                        foreach($community->getParticipants() as $participant)
                        {
                                if(in_array($participant->getMid(), $en))
                                {
                                        $e_part[] = $participant;
                                }
                        }
                }
                return $e_part ? $e_part : array();
        }

        private function read()
        {
                global $ilLog;
                
                try
                {
                        $res = $this->connector->getMemberships();
                        if(!is_array($res->getResult()))
                        {
                                return false;
                        }
                        foreach($res->getResult() as $community)
                        {
                                $tmp_comm = new ilECSCommunity($community);
                                foreach($tmp_comm->getParticipants() as $participant)
                                {
                                        $this->participants[$participant->getMID()] = $participant;
                                        if($participant->isSelf())
                                        {
                                                $this->own_ids[] = $participant->getMID();
                                        }
                                }
                                $this->communities[] = $tmp_comm;
                        }                       
                }
                catch(ilECSConnectorException $e)
                {
                        $ilLog->write(__METHOD__.': Error connecting to ECS server. '.$e->getMessage());
                        throw $e;
                }
        }
}
?>