class.ilObjMediaPool.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. |
        +-----------------------------------------------------------------------------+
*/


require_once "classes/class.ilObject.php";
require_once "./Services/MetaData/classes/class.ilMDLanguageItem.php";
require_once("./Modules/Folder/classes/class.ilObjFolder.php");

class ilObjMediaPool extends ilObject
{
        var $tree;

        function ilObjMediaPool($a_id = 0,$a_call_by_reference = true)
        {
                // this also calls read() method! (if $a_id is set)
                $this->type = "mep";
                $this->ilObject($a_id,$a_call_by_reference);
        }

        function read()
        {
                parent::read();

                $this->tree = ilObjMediaPool::getPoolTree($this->getId());
        }

        static function getPoolTree($a_obj_id)
        {
                $tree = new ilTree($a_obj_id);
                $tree->setTreeTablePK("mep_id");
                $tree->setTableNames("mep_tree", "object_data");
                
                return $tree;
        }
        
        function create()
        {
                parent::create();

                // create media pool tree
                $this->tree =& new ilTree($this->getId());
                $this->tree->setTreeTablePK("mep_id");
                $this->tree->setTableNames('mep_tree','object_data');
                $this->tree->addTree($this->getId(), 1);

        }

        function &getTree()
        {
                return $this->tree;
        }

        function update()
        {
                if (!parent::update())
                {
                        return false;
                }

                // put here object specific stuff

                return true;
        }


        function delete()
        {
                // always call parent delete function first!!
                if (!parent::delete())
                {
                        return false;
                }

                // get childs
                $childs = $this->tree->getSubTree($this->tree->getNodeData($this->tree->readRootId()));

                // delete tree
                $this->tree->removeTree($this->tree->getTreeId());

                // delete childs
                foreach ($childs as $child)
                {
                        switch ($child["type"])
                        {
                                case "mob":
                                        include_once("./Services/MediaObjects/classes/class.ilObjMediaObject.php");
                                        $mob = new ilObjMediaObject($child["obj_id"]);
                                        $mob->delete();
                                        break;

                                case "fold":
                                        include_once("./Modules/Folder/classes/class.ilObjFolder.php");
                                        $fold = new ilObjFolder($child["obj_id"], false);
                                        $fold->delete();
                                        break;
                        }
                }



                return true;
        }

        function initDefaultRoles()
        {
                global $rbacadmin;

                // create a local role folder
                //$rfoldObj = $this->createRoleFolder("Local roles","Role Folder of forum obj_no.".$this->getId());

                // create moderator role and assign role to rolefolder...
                //$roleObj = $rfoldObj->createRole("Moderator","Moderator of forum obj_no.".$this->getId());
                //$roles[] = $roleObj->getId();

                //unset($rfoldObj);
                //unset($roleObj);

                return $roles ? $roles : array();
        }

        function notify($a_event,$a_ref_id,$a_parent_non_rbac_id,$a_node_id,$a_params = 0)
        {
                global $tree;

                switch ($a_event)
                {
                        case "link":

                                //var_dump("<pre>",$a_params,"</pre>");
                                //echo "Module name ".$this->getRefId()." triggered by link event. Objects linked into target object ref_id: ".$a_ref_id;
                                //exit;
                                break;

                        case "cut":

                                //echo "Module name ".$this->getRefId()." triggered by cut event. Objects are removed from target object ref_id: ".$a_ref_id;
                                //exit;
                                break;

                        case "copy":

                                //var_dump("<pre>",$a_params,"</pre>");
                                //echo "Module name ".$this->getRefId()." triggered by copy event. Objects are copied into target object ref_id: ".$a_ref_id;
                                //exit;
                                break;

                        case "paste":

                                //echo "Module name ".$this->getRefId()." triggered by paste (cut) event. Objects are pasted into target object ref_id: ".$a_ref_id;
                                //exit;
                                break;

                        case "new":

                                //echo "Module name ".$this->getRefId()." triggered by paste (new) event. Objects are applied to target object ref_id: ".$a_ref_id;
                                //exit;
                                break;
                }

                // At the beginning of the recursive process it avoids second call of the notify function with the same parameter
                if ($a_node_id==$_GET["ref_id"])
                {
                        $parent_obj =& $this->ilias->obj_factory->getInstanceByRefId($a_node_id);
                        $parent_type = $parent_obj->getType();
                        if($parent_type == $this->getType())
                        {
                                $a_node_id = (int) $tree->getParentId($a_node_id);
                        }
                }

                parent::notify($a_event,$a_ref_id,$a_parent_non_rbac_id,$a_node_id,$a_params);
        }


        function getChilds($obj_id = "", $a_type = "")
        {
                $objs = array();
                $mobs = array();
                if ($obj_id == "")
                {
                        $obj_id = $this->tree->getRootId();
                }

                if ($a_type != "mob")
                {
                        $objs = $this->tree->getChildsByType($obj_id, "fold");
                }
                if ($a_type != "fold")
                {               
                        $mobs = $this->tree->getChildsByType($obj_id, "mob");
                }
                foreach($mobs as $key => $mob)
                {
                        $objs[] = $mob;
                }

                return $objs;
        }

        function getParentId($obj_id = "")
        {
                if ($obj_id == "")
                {
                        return false;
                }
                if ($obj_id == $this->tree->getRootId())
                {
                        return false;
                }

                return $this->tree->getParentId($obj_id);
        }
        
        function insertInTree($a_obj_id, $a_parent = "")
        {
                if (!$this->tree->isInTree($a_obj_id))
                {
                        $parent = ($a_parent == "")
                                ? $this->tree->getRootId()
                                : $a_parent;
                        $this->tree->insertNode($a_obj_id, $parent);
                        return true;
                }
                else
                {
                        return false;
                }
        }


        function deleteChild($obj_id)
        {
                $type = ilObject::_lookupType($obj_id);
                $title = ilObject::_lookupTitle($obj_id);


                $node_data = $this->tree->getNodeData($obj_id);
                $subtree = $this->tree->getSubtree($node_data);

                // delete tree
                if($this->tree->isInTree($obj_id))
                {
                        $this->tree->deleteTree($node_data);
                }

                // delete objects
                foreach ($subtree as $node)
                {
                        if ($node["type"] == "mob")
                        {
                                $obj =& new ilObjMediaObject($node["child"]);
                                $obj->delete();
                        }

                        if ($node["type"] == "fold")
                        {
                                $obj =& new ilObjFolder($node["child"], false);
                                $obj->delete();
                        }
                }
        }
}
?>