content/classes/class.ilStructureObject.php

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<?php
/*
        +-----------------------------------------------------------------------------+
        | ILIAS open source                                                           |
        +-----------------------------------------------------------------------------+
        | Copyright (c) 1998-2001 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("content/classes/class.ilLMObject.php");

class ilStructureObject extends ilLMObject
{
        var $is_alias;
        var $origin_id;
        var $tree;

        function ilStructureObject(&$a_content_obj, $a_id = 0)
        {
                $this->setType("st");
                parent::ilLMObject($a_content_obj, $a_id);
        }

        function create($a_upload = false)
        {
                parent::create($a_upload);
        }

        function delete($a_delete_meta_data = true)
        {
                $this->tree = new ilTree($this->getLmId());
                $this->tree->setTableNames('lm_tree', 'lm_data');
                $this->tree->setTreeTablePK("lm_id");
                $node_data = $this->tree->getNodeData($this->getId());
                $this->delete_rec($this->tree, $a_delete_meta_data);
                $this->tree->deleteTree($node_data);
        }

        function delete_rec(&$a_tree, $a_delete_meta_data = true)
        {
                $childs = $a_tree->getChilds($this->getId());
                foreach ($childs as $child)
                {
                        $obj =& ilLMObjectFactory::getInstance($this->content_object, $child["obj_id"], false);
                        if (is_object($obj))
                        {
                                if($obj->getType() == "st")
                                {
                                        $obj->delete_rec($a_tree, $a_delete_meta_data);
                                }
                                if($obj->getType() == "pg")
                                {
                                        $obj->delete($a_delete_meta_data);
                                }
                        }
                        unset($obj);
                }
                parent::delete($a_delete_meta_data);
        }
        
        function &copy(&$lmtree, $a_parent, $a_pos = IL_LAST_NODE)
        {
                $meta =& new ilMetaData();
                $chap =& new ilLMPageObject($this->getContentObject());
                $chap->assignMetaData($meta);
                $chap->setTitle($this->getTitle());
                $chap->setLMId($this->getLMId());
                $chap->setType($this->getType());
                $chap->setDescription($this->getDescription());
                $chap->create();
                
                // insert chapter in tree
                $lmtree->insertNode($chap->getId(), $a_parent, $a_pos);

                $childs =& $lmtree->getChilds($this->getId());
                foreach($childs as $child)
                {
                        $lmobj = ilLMObjectFactory::getInstance($this->getContentObject(), $child["obj_id"], true);
                        $newobj =& $lmobj->copy($lmtree, $chap->getId());
                        // insert page in tree
                        if ($newobj->getType() == "pg")
                        {
                                $lmtree->insertNode($newobj->getId(), $chap->getId());
                        }
                }

                return $chap;
        }


        function _goto($a_target)
        {
                global $rbacsystem, $ilErr, $lng;

                // determine learning object
                $lm_id = ilLMObject::_lookupContObjID($a_target);

                // get all references
                $ref_ids = ilObject::_getAllReferences($lm_id);

                // check read permissions
                foreach ($ref_ids as $ref_id)
                {
                        include_once 'classes/class.ilSearch.php';
                        
                        // Added this additional check (ParentConditions) to avoid calls of objects inside e.g courses.
                        // Will be replaced in future releases by ilAccess::checkAccess()
                        if ($rbacsystem->checkAccess("read", $ref_id) and ilSearch::_checkParentConditions($ref_id))
                        {
                                ilUtil::redirect("content/lm_presentation.php?ref_id=$ref_id".
                                        "&obj_id=$a_target");
                        }
                }

                $ilErr->raiseError($lng->txt("msg_no_perm_read_lm"), $ilErr->FATAL);
        }


        function exportXML(&$a_xml_writer, $a_inst, &$expLog)
        {
                global $ilBench;

                $expLog->write(date("[y-m-d H:i:s] ")."Structure Object ".$this->getId());
                $attrs = array();
                $a_xml_writer->xmlStartTag("StructureObject", $attrs);

                // MetaData
                $ilBench->start("ContentObjectExport", "exportStructureObject_exportMeta");
                $this->exportXMLMetaData($a_xml_writer);
                $ilBench->stop("ContentObjectExport", "exportStructureObject_exportMeta");

                // StructureObjects
                $ilBench->start("ContentObjectExport", "exportStructureObject_exportPageObjects");
                $this->exportXMLPageObjects($a_xml_writer, $a_inst);
                $ilBench->stop("ContentObjectExport", "exportStructureObject_exportPageObjects");

                // PageObjects
                $this->exportXMLStructureObjects($a_xml_writer, $a_inst, $expLog);

                // Layout
                // not implemented

                $a_xml_writer->xmlEndTag("StructureObject");
        }


        function exportXMLMetaData(&$a_xml_writer)
        {
                $nested = new ilNestedSetXML();
                $nested->setParameterModifier($this, "modifyExportIdentifier");
                $a_xml_writer->appendXML($nested->export($this->getId(),
                        $this->getType()));
        }

        function modifyExportIdentifier($a_tag, $a_param, $a_value)
        {
                if ($a_tag == "Identifier" && $a_param == "Entry")
                {
                        $a_value = "il_".IL_INST_ID."_st_".$this->getId();
                        //$a_value = ilUtil::insertInstIntoID($a_value);
                }

                return $a_value;
        }

        function _getPresentationTitle($a_st_id, $a_include_numbers = false)
        {
                global $ilDB;

                // get chapter data
                $query = "SELECT * FROM lm_data WHERE obj_id = '".$a_st_id."'";
                $st_set = $ilDB->query($query);
                $st_rec = $st_set->fetchRow(DB_FETCHMODE_ASSOC);

                $tree = new ilTree($st_rec["lm_id"]);
                $tree->setTableNames('lm_tree','lm_data');
                $tree->setTreeTablePK("lm_id");

                if ($a_include_numbers)
                {
                        if ($tree->isInTree($st_rec["obj_id"]))
                        {
                                // get chapter tree node
                                $query = "SELECT * FROM lm_tree WHERE child = ".
                                        $ilDB->quote($a_st_id)." AND lm_id = ".
                                        $ilDB->quote($st_rec["lm_id"]);
                                $tree_set = $ilDB->query($query);
                                $tree_node = $tree_set->fetchRow(DB_FETCHMODE_ASSOC);
                                $depth = $tree_node["depth"];

                                $nr = $tree->getChildSequenceNumber($tree_node, "st")." ";
                                for ($i = $depth - 1; $i > 1; $i --)
                                {
                                        // get next parent tree node
                                        $query = "SELECT * FROM lm_tree WHERE child = ".
                                        $ilDB->quote($tree_node["parent"])." AND lm_id = ".
                                        $ilDB->quote($st_rec["lm_id"]);
                                        $tree_set = $ilDB->query($query);
                                        $tree_node = $tree_set->fetchRow(DB_FETCHMODE_ASSOC);
                                        $seq = $tree->getChildSequenceNumber($tree_node, "st");

                                        $nr = $seq.".".$nr;
                                }
                        }
                }

                return $nr.$st_rec["title"];
        }



        function exportXMLPageObjects(&$a_xml_writer, $a_inst = 0)
        {
                include_once './content/classes/class.ilLMPageObject.php';

                global $ilBench;

                $this->tree = new ilTree($this->getLmId());
                $this->tree->setTableNames('lm_tree', 'lm_data');
                $this->tree->setTreeTablePK("lm_id");

                $childs = $this->tree->getChilds($this->getId());
                foreach ($childs as $child)
                {
                        if($child["type"] != "pg")
                        {
                                continue;
                        }

                        // export xml to writer object
                        $ilBench->start("ContentObjectExport", "exportStructureObject_exportPageObjectAlias");
                        //$ilBench->start("ContentObjectExport", "exportStructureObject_getLMPageObject");
                        //$page_obj = new ilLMPageObject($this->getContentObject(), $child["obj_id"]);
                        //$ilBench->stop("ContentObjectExport", "exportStructureObject_getLMPageObject");
                        ilLMPageObject::_exportXMLAlias($a_xml_writer, $child["obj_id"], $a_inst);
                        //$page_obj->exportXML($a_xml_writer, "alias", $a_inst);
                        //unset($page_obj);
                        $ilBench->stop("ContentObjectExport", "exportStructureObject_exportPageObjectAlias");
                }
        }


        function exportXMLStructureObjects(&$a_xml_writer, $a_inst, &$expLog)
        {
                $this->tree = new ilTree($this->getLmId());
                $this->tree->setTableNames('lm_tree', 'lm_data');
                $this->tree->setTreeTablePK("lm_id");

                $childs = $this->tree->getChilds($this->getId());
                foreach ($childs as $child)
                {
                        if($child["type"] != "st")
                        {
                                continue;
                        }

                        // export xml to writer object
                        $structure_obj = new ilStructureObject($this->getContentObject(),
                                $child["obj_id"]);
                        $structure_obj->exportXML($a_xml_writer, $a_inst, $expLog);
                        unset($structure_obj);
                }
        }

        function exportFO(&$a_xml_writer)
        {
                global $ilBench;

                //$expLog->write(date("[y-m-d H:i:s] ")."Structure Object ".$this->getId());

                // fo:block (complete)
                $attrs = array();
                $attrs["font-family"] = "Times";
                $attrs["font-size"] = "14pt";
                $a_xml_writer->xmlElement("fo:block", $attrs, $this->getTitle());

                // page objects
                //$ilBench->start("ContentObjectExport", "exportStructureObject_exportPageObjects");
                $this->exportFOPageObjects($a_xml_writer);
                //$ilBench->stop("ContentObjectExport", "exportStructureObject_exportPageObjects");

                // structure objects
                //$this->exportFOStructureObjects($a_xml_writer);

        }

        function exportFOPageObjects(&$a_xml_writer)
        {
                global $ilBench;

                $this->tree = new ilTree($this->getLmId());
                $this->tree->setTableNames('lm_tree', 'lm_data');
                $this->tree->setTreeTablePK("lm_id");

                $childs = $this->tree->getChilds($this->getId());
                foreach ($childs as $child)
                {
                        if($child["type"] != "pg")
                        {
                                continue;
                        }

                        // export xml to writer object
                        //$ilBench->start("ContentObjectExport", "exportStructureObject_exportPageObjectAlias");

                        $page_obj = new ilLMPageObject($this->getContentObject(), $child["obj_id"]);
                        $page_obj->exportFO($a_xml_writer);

                        //$ilBench->stop("ContentObjectExport", "exportStructureObject_exportPageObjectAlias");
                }
        }

}
?>