class.ilSystemCheckTrash.php

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<?php
class ilSystemCheckTrash
{
        const MODE_TRASH_RESTORE = 1;
        const MODE_TRASH_REMOVE = 2;
        
        private $limit_number = 0;
        private $limit_age = null;
        private $limit_types = array();
        
        
        public function __construct()
        {
                $this->limit_age = new ilDate(0, IL_CAL_UNIX);
        }
        
        public function setNumberLimit($a_limit)
        {
                $this->limit_number = $a_limit;
        }
        
        public function getNumberLimit()
        {
                return $this->limit_number;
        }
        
        public function setAgeLimit(ilDateTime $dt)
        {
                $this->limit_age = $dt;
        }
        
        public function getAgeLimit()
        {
                return $this->limit_age;
        }
        
        public function setTypesLimit($a_types)
        {
                $this->limit_types = (array) $a_types;
        }
        
        public function getTypesLimit()
        {
                return (array) $this->limit_types;
        }
        
        public function setMode($a_mode)
        {
                $this->mode = $a_mode;
        }
        
        public function getMode()
        {
                return $this->mode;
        }
        
        public function start()
        {
                $GLOBALS['ilLog']->write(__METHOD__.': Handling delete');
                switch($this->getMode())
                {
                        case self::MODE_TRASH_RESTORE:
                                $GLOBALS['ilLog']->write(__METHOD__.': Restore trash to recovery folder');
                                $this->restore();
                                break;
                                
                        case self::MODE_TRASH_REMOVE:
                                $GLOBALS['ilLog']->write(__METHOD__.': Remove selected from system.');
                                $GLOBALS['ilLog']->write(__METHOD__.': Type limit: '. print_r($this->getTypesLimit(),TRUE));
                                $GLOBALS['ilLog']->write(__METHOD__.': Age limit: '. (string) $this->getAgeLimit());
                                $GLOBALS['ilLog']->write(__METHOD__.': Number limit: '. (string) $this->getNumberLimit());
                                $this->removeSelectedFromSystem();
                                return TRUE;
                }
        }

        protected function restore()
        {
                $deleted = $this->readDeleted();
                
                $GLOBALS['ilLog']->write(__METHOD__.': Found deleted : '.print_r($deleted,TRUE));
                
                $factory = new ilObjectFactory();
                
                foreach($deleted as $tmp_num => $deleted_info)
                {
                        $ref_obj = $factory->getInstanceByRefId($deleted_info['child'], FALSE);
                        if(!$ref_obj instanceof ilObject)
                        {
                                continue;
                        }

                        $GLOBALS['tree']->deleteNode($deleted_info['tree'],$deleted_info['child']);
                        $GLOBALS['ilLog']->write(__METHOD__.': Object tree entry deleted');
                        
                        if($ref_obj->getType() != 'rolf')
                        {
                                $GLOBALS['rbacadmin']->revokePermission($deleted_info['child']);
                                $ref_obj->putInTree(RECOVERY_FOLDER_ID);
                                $ref_obj->setPermissions(RECOVERY_FOLDER_ID);
                                $GLOBALS['ilLog']->write(__METHOD__.': Object moved to recovery folder');
                        }
                }
        }
        
        protected function removeSelectedFromSystem()
        {
                $factory = new ilObjectFactory();

                $deleted = $this->readSelectedDeleted();
                foreach($deleted as $tmp_num => $deleted_info)
                {
                        $sub_nodes = $this->readDeleted($deleted_info['tree']);
                        
                        foreach($sub_nodes as $tmp_num => $subnode_info)
                        {
                                $ref_obj = $factory->getInstanceByRefId($subnode_info['child'], FALSE);
                                if(!$ref_obj instanceof ilObject)
                                {
                                        continue;
                                }
                                
                                $ref_obj->delete();
                                ilTree::_removeEntry($subnode_info['tree'],$subnode_info['child']);
                        }
                }
        }
        
        protected function readSelectedDeleted()
        {
                global $ilDB;
                
                $and_types = '';
                ilLoggerFactory::getLogger('sysc')->dump($this->getTypesLimit());
                
                $types = array();
                foreach((array) $this->getTypesLimit() as $id => $type)
                {
                        if($type)
                        {
                                $types[] = $type;
                        }
                }
                if(count($types))
                {
                        $and_types = 'AND '.$ilDB->in('o.type', $this->getTypesLimit(),FALSE,'text').' ';
                }
                
                $and_age = '';
                $age_limit = $this->getAgeLimit()->get(IL_CAL_UNIX);
                if($age_limit > 0)
                {
                        $and_age = 'AND r.deleted < '.$ilDB->quote($this->getAgeLimit()->get(IL_CAL_DATETIME)).' ';
                }
                $limit = '';
                if($this->getNumberLimit())
                {
                        $limit = 'LIMIT '.(int) $this->getNumberLimit();
                }
                
                $query = 'SELECT child,tree FROM tree t JOIN object_reference r ON child = r.ref_id '.
                                'JOIN object_data o on r.obj_id = o.obj_id '.
                                'WHERE tree < '.$ilDB->quote(0,'integer').' '.
                                'AND child = -tree ';
                
                $query .= $and_age;
                $query .= $and_types;
                $query .= 'ORDER BY depth desc ';
                $query .= $limit;
                
                $GLOBALS['ilLog']->write($query);
                
                $deleted = array();
                $res = $ilDB->query($query);
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        $deleted[] = array(
                                'tree' => $row->tree,
                                'child' => $row->child
                        );
                }
                return $deleted;
                
        }




        protected function readDeleted($tree_id = null)
        {
                global $ilDB;
                
                $query = 'SELECT child,tree FROM tree t JOIN object_reference r ON child = r.ref_id '.
                                'JOIN object_data o on r.obj_id = o.obj_id ';
                
                if($tree_id === null)
                {
                        $query .= 'WHERE tree < '.$ilDB->quote(0,'integer').' ';
                }
                else
                {
                        $query .= 'WHERE tree = '.$ilDB->quote($tree_id,'integer').' ';
                }
                $query .= 'ORDER BY depth desc';
                
                $res = $ilDB->query($query);
                
                $deleted = array();
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        $deleted[] = array(
                                'tree' => $row->tree,
                                'child' => $row->child
                        );
                }
                return $deleted;
        }
        
}
?>