class.ilLPStatusFactory.php

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<?php

/* Copyright (c) 1998-2010 ILIAS open source, Extended GPL, see docs/LICENSE */

include_once 'Services/Tracking/classes/class.ilLPObjSettings.php';

class ilLPStatusFactory
{
        static private $class_by_obj_id = array();
        
        function _getClassById($a_obj_id, $a_mode = NULL)
        {               
                if($a_mode === NULL)
                {
                        include_once 'Services/Object/classes/class.ilObjectLP.php';
                        $olp = ilObjectLP::getInstance($a_obj_id);                                      
                        $a_mode = $olp->getCurrentMode();
                        
                        // please keep the cache in this if-block, otherwise default values
                        // will not trigger the include_once calls
                        if (isset(self::$class_by_obj_id[$a_obj_id]))
                        {
                                return self::$class_by_obj_id[$a_obj_id];
                        }
                }

                $map = ilLPObjSettings::getClassMap();
                
                if(array_key_exists($a_mode, $map))
                {
                        $class = $map[$a_mode];
                                                
                        // undefined? try object lp directly
                        if($class === null)                             
                        {
                                include_once 'Services/Object/classes/class.ilObjectLP.php';
                                $olp = ilObjectLP::getInstance($a_obj_id);                                      
                                $mode = $olp->getCurrentMode();
                                if($mode != ilLPObjSettings::LP_MODE_UNDEFINED)
                                {
                                        return self::_getClassById($a_obj_id, $mode);
                                }       
                        }                       
                        else
                        {
                                self::includeClass($class);
                                self::$class_by_obj_id[$a_obj_id] = $class;
                                return $class;
                        }                       
                }

                // we probably can do better
                echo "ilLPStatusFactory: unknown type ".$a_mode;
                exit;   
        }
        
        protected static function includeClass($a_class)
        {
                 $path = ($a_class == 'ilLPStatus')
                        ? 'Services/Tracking/classes/'
                        : 'Services/Tracking/classes/status/';
                 include_once $path.'class.'.$a_class.'.php';
        }

        function _getClassByIdAndType($a_obj_id,$a_type)
        {
                // id is ignored in the moment
                switch($a_type)
                {
                        case 'event':
                                self::includeClass('ilLPStatusEvent');          
                                return 'ilLPStatusEvent';

                        default:
                                echo "ilLPStatusFactory: unknown type: ".$a_type;
                                exit;
                }
        }

        function _getInstance($a_obj_id, $a_mode = NULL)
        {               
                if($a_mode === NULL)
                {
                        include_once 'Services/Object/classes/class.ilObjectLP.php';
                        $olp = ilObjectLP::getInstance($a_obj_id);                                      
                        $a_mode = $olp->getCurrentMode();
                }
                
                $map = ilLPObjSettings::getClassMap();
                
                if(array_key_exists($a_mode, $map))
                {
                        $class = $map[$a_mode];
                                                
                        // undefined? try object lp directly
                        if($class === null)                             
                        {
                                include_once 'Services/Object/classes/class.ilObjectLP.php';
                                $olp = ilObjectLP::getInstance($a_obj_id);                                      
                                $mode = $olp->getCurrentMode();
                                if($mode != ilLPObjSettings::LP_MODE_UNDEFINED)
                                {
                                        return self::_getInstance($a_obj_id, $mode);
                                }
                        }                       
                        else
                        {
                                self::includeClass($class);                     
                                return new $class($a_obj_id);
                        }               
                }
                
                // we probably can do better
                echo "ilLPStatusFactory: unknown type ".$a_mode;
                exit;
        }
}

?>