content/classes/class.ilContObjParser.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("content/classes/class.ilLMPageObject.php");
require_once("content/classes/Pages/class.ilPageObject.php");
require_once("content/classes/class.ilStructureObject.php");
require_once("content/classes/class.ilObjLearningModule.php");
require_once("classes/class.ilMetaData.php");
require_once("content/classes/Pages/class.ilPCParagraph.php");
require_once("content/classes/Pages/class.ilPCTable.php");
require_once("content/classes/Media/class.ilObjMediaObject.php");
require_once("content/classes/Media/class.ilMediaItem.php");
require_once("content/classes/Media/class.ilMapArea.php");
require_once("content/classes/class.ilBibItem.php");
require_once("content/classes/class.ilObjGlossary.php");
require_once("content/classes/class.ilGlossaryTerm.php");
require_once("content/classes/class.ilGlossaryDefinition.php");
require_once("content/classes/Pages/class.ilInternalLink.php");
require_once("classes/class.ilObjFile.php");

include_once("Services/MetaData/classes/class.ilMDSaxParser.php");
include_once("Services/MetaData/classes/class.ilMD.php");

class ilContObjParser extends ilMDSaxParser
{
        var $lng;
        var $tree;
        var $cnt;                               // counts open elements
        var $current_element;   // store current element type
        var $learning_module;   // current learning module
        var $page_object;               // current page object
        var $lm_page_object;
        var $structure_objects; // array of current structure objects
        var $media_object;
        var $current_object;    // at the time a LearningModule, PageObject or StructureObject
        var $meta_data;                 // current meta data object
        var $paragraph;
        var $table;
        var $lm_tree;
        var $pg_into_tree;
        var $st_into_tree;
        var $container;
        var $in_page_object;    // are we currently within a PageObject? true/false
        var $in_meta_data;              // are we currently within MetaData? true/false
        var $in_media_object;
        var $in_file_item;
        var $in_glossary;
        var $in_map_area;
        var $content_object;
        var $glossary_object;
        var $file_item;
        var $keyword_language;
        var $pages_to_parse;
        var $mob_mapping;
        var $file_item_mapping;
        var $subdir;
        var $media_item;                // current media item
        var $loc_type;                  // current location type
        var $bib_item;                  // current bib item object
        var $map_area;                  // current map area
        var $in_bib_item;               // are we currently within BibItem? true/false
        var $link_targets;              // stores all objects by import id
        var $qst_mapping;
        var $metadata_parsing_disabled;
        var $in_meta_meta_data = false;

        function ilContObjParser(&$a_content_object, $a_xml_file, $a_subdir)
        {
                global $lng, $tree;

                parent::ilMDSaxParser($a_xml_file);
                $this->cnt = array();
                $this->current_element = array();
                $this->structure_objects = array();
                $this->content_object =& $a_content_object;
                //$this->lm_id = $a_lm_id;
                $this->st_into_tree = array();
                $this->pg_into_tree = array();
                $this->pages_to_parse = array();
                $this->mobs_with_int_links = array();
                $this->mob_mapping = array();
                $this->file_item_mapping = array();
                $this->pg_mapping = array();
                $this->link_targets = array();
                $this->subdir = $a_subdir;
                $this->lng =& $lng;
                $this->tree =& $tree;
                $this->inside_code = false;
                $this->qst_mapping = array();
                $this->coType = $this->content_object->getType();
                $this->metadata_parsing_disabled = false;

                if (($this->coType != "tst") and ($this->coType != "qpl"))
                {
                        $this->lm_tree = new ilTree($this->content_object->getId());
                        $this->lm_tree->setTreeTablePK("lm_id");
                        $this->lm_tree->setTableNames('lm_tree','lm_data');
                }
                //$this->lm_tree->addTree($a_lm_id, 1); happens in ilObjLearningModuleGUI

        }

        function setHandlers($a_xml_parser)
        {
                xml_set_object($a_xml_parser,$this);
                xml_set_element_handler($a_xml_parser,'handlerBeginTag','handlerEndTag');
                xml_set_character_data_handler($a_xml_parser,'handlerCharacterData');
        }

        
        function startParsing()
        {
//echo "<b>start parsing</b><br>";
                parent::startParsing();
//echo "<b>storeTree</b><br>";
                $this->storeTree();
//echo "<b>processPagesToParse</b><br>";
                $this->processPagesToParse();
//echo "<b>copyMobFiles</b><br>";
                $this->copyMobFiles();
//echo "<b>copyFileItems</b><br>";
                $this->copyFileItems();
        }

        
        function storeTree()
        {
                global $ilLog;

//echo "<b>Storing the tree</b><br>";
                foreach($this->st_into_tree as $st)
                {
//echo "insert st id: ".$st["id"].", parent:".$st["parent"]."<br>";
                        $this->lm_tree->insertNode($st["id"], $st["parent"]);
//echo "done<br>";
                        if (is_array($this->pg_into_tree[$st["id"]]))
                        {
                                foreach($this->pg_into_tree[$st["id"]] as $pg)
                                {
                                        switch ($pg["type"])
                                        {
                                                case "pg_alias":
                                                        if ($this->pg_mapping[$pg["id"]] == "")
                                                        {
                                                                $ilLog->write("LM Import: No PageObject for PageAlias ".
                                                                                          $pg["id"]." found! (Please update export installation to ILIAS 3.3.0)");

                                                                // Jump two levels up. First level is switch
                                                                continue 2;
                                                        }
                                                        $pg_id = $this->pg_mapping[$pg["id"]];
                                                        break;

                                                case "pg":
                                                        $pg_id = $pg["id"];
                                                        break;
                                        }
                                        if (!$this->lm_tree->isInTree($pg_id))
                                        {
                                                $this->lm_tree->insertNode($pg_id, $st["id"]);
                                        }
                                }
                        }
                }
//echo "<b>END: storing the tree</b>";
        }


        function processPagesToParse()
        {
                /*
                $pg_mapping = array();
                foreach($this->pg_mapping as $key => $value)
                {
                        $pg_mapping[$key] = "il__pg_".$value;
                }*/
//echo "<br><b>processIntLinks</b>"; flush();

                // outgoin internal links
                foreach($this->pages_to_parse as $page_id)
                {
                        $page_arr = explode(":", $page_id);
//echo "<br>resolve:".$this->content_object->getType().":".$page_id; flush();
                        switch($page_arr[0])
                        {
                                case "lm":
                                        $page_obj =& new ilPageObject($this->content_object->getType(), $page_arr[1]);
                                        break;

                                case "gdf":
                                        $page_obj =& new ilPageObject("gdf", $page_arr[1]);
                                        break;
                        }
                        $page_obj->buildDom();
                        $page_obj->resolveIntLinks();
                        $page_obj->update(false);

                        if ($page_arr[0] == "gdf")
                        {
                                $def =& new ilGlossaryDefinition($page_arr[1]);
                                $def->updateShortText();
                        }

                        unset($page_obj);
                }

//echo "<br><b>map area internal links</b>"; flush();
                // outgoins map area (mob) internal links
                foreach($this->mobs_with_int_links as $mob_id)
                {
                        ilMediaItem::_resolveMapAreaLinks($mob_id);
                }

//echo "<br><b>incoming interna links</b>"; flush();
                // incoming internal links
                $done = array();
                foreach ($this->link_targets as $link_target)
                {
//echo "doin link target:".$link_target.":<br>";
                        $link_arr = explode("_", $link_target);
                        $target_inst = $link_arr[1];
                        $target_type = $link_arr[2];
                        $target_id = $link_arr[3];
                        $sources = ilInternalLink::_getSourcesOfTarget($target_type, $target_id, $target_inst);
                        foreach($sources as $key => $source)
                        {
//echo "got source:".$key.":<br>";
                                if(in_array($key, $done))
                                {
                                        continue;
                                }
                                $type_arr = explode(":", $source["type"]);

                                // content object pages
                                if ($type_arr[1] == "pg")
                                {
                                        $page_object = new ilPageObject($type_arr[0], $source["id"]);
                                        $page_object->buildDom();
                                        $page_object->resolveIntLinks();
                                        $page_object->update();
                                        unset($page_object);
                                }
                                // eventually correct links in questions to learning modules
                                if ($type_arr[0] == "qst")
                                {
                                        require_once "./assessment/classes/class.assQuestion.php";
                                        assQuestion::_resolveIntLinks($source["id"]);
                                }
                                // eventually correct links in survey questions to learning modules
                                if ($type_arr[0] == "sqst")
                                {
                                        require_once "./survey/classes/class.SurveyQuestion.php";
                                        assQuestion::_resolveIntLinks($source["id"]);
                                }
                                $done[$key] = $key;
                        }
                }
        }


        function copyMobFiles()
        {
                $imp_dir = $this->content_object->getImportDirectory();
                foreach ($this->mob_mapping as $origin_id => $mob_id)
                {
                        if(empty($origin_id))
                        {
                                continue;
                        }

                        /*
                        $origin_arr = explode("_", $origin_id);
                        if ($origin_arr[2] == "el") // imagemap
                        {
                                $obj_dir = "imagemap".$origin_arr[3];
                        }
                        else // normal media object
                        {
                                $obj_dir = "mm".$origin_arr[3];
                        }*/

                        $obj_dir = $origin_id;
                        $source_dir = $imp_dir."/".$this->subdir."/objects/".$obj_dir;
                        $target_dir = ilUtil::getWebspaceDir()."/mobs/mm_".$mob_id;

//echo "copy from $source_dir to $target_dir <br>";
                        if (@is_dir($source_dir))
                        {
                                // make target directory
                                ilUtil::makeDir($target_dir);
                                //@mkdir($target_dir);
                                //@chmod($target_dir, 0755);

                                if (@is_dir($target_dir))
                                {
                                        ilUtil::rCopy($source_dir, $target_dir);
                                }
                        }
                }
        }

        function copyFileItems()
        {
                $imp_dir = $this->content_object->getImportDirectory();
                foreach ($this->file_item_mapping as $origin_id => $file_id)
                {
                        if(empty($origin_id))
                        {
                                continue;
                        }
                        $obj_dir = $origin_id;
                        $source_dir = $imp_dir."/".$this->subdir."/objects/".$obj_dir;
                        $target_dir = ilUtil::getDataDir()."/files/file_".$file_id;

//echo "copy from $source_dir to $target_dir <br>";
                        if (@is_dir($source_dir))
                        {
                                // make target directory
                                ilUtil::makeDir($target_dir);
                                //@mkdir($target_dir);
                                //@chmod($target_dir, 0755);

                                if (@is_dir($target_dir))
                                {
                                        ilUtil::rCopy($source_dir, $target_dir);
                                }
                        }
                }
        }
        
        function setQuestionMapping($a_map)
        {
                $this->qst_mapping = $a_map;
        }


        /*
        * update parsing status for a element begin
        */
        function beginElement($a_name)
        {
                if(!isset($this->status["$a_name"]))
                {
                        $this->cnt[$a_name] == 1;
                }
                else
                {
                        $this->cnt[$a_name]++;
                }
                $this->current_element[count($this->current_element)] = $a_name;
        }

        /*
        * update parsing status for an element ending
        *
        * @param        string  $a_name         element name
        */
        function endElement($a_name)
        {
                $this->cnt[$a_name]--;
                unset ($this->current_element[count($this->current_element) - 1]);
        }

        /*
        * returns current element
        */
        function getCurrentElement()
        {
                return ($this->current_element[count($this->current_element) - 1]);
        }

        /*
        * returns number of current open elements of type $a_name
        *
        * @param        string  $a_name         element name
        */
        function getOpenCount($a_name)
        {
                if (isset($this->cnt[$a_name]))
                {
                        return $this->cnt[$a_name];
                }
                else
                {
                        return 0;
                }

        }

        function buildTag ($type, $name, $attr="")
        {
                $tag = "<";

                if ($type == "end")
                        $tag.= "/";

                $tag.= $name;

                if (is_array($attr))
                {
                        while (list($k,$v) = each($attr))
                                $tag.= " ".$k."=\"$v\"";
                }

                $tag.= ">";

                return $tag;
        }

        function handlerBeginTag($a_xml_parser,$a_name,$a_attribs)
        {
//echo "<b>BEGIN TAG: $a_name <br></b>"; flush();
                switch($a_name)
                {
                        case "ContentObject":
                                $this->current_object =& $this->content_object;
//echo "<br>Parser:CObjType:".$a_attribs["Type"];
                                if ($a_attribs["Type"] == "Glossary")
                                {
                                        $this->glossary_object =& $this->content_object;
                                }
                                break;

                        case "StructureObject":
//echo "<br><br>StructureOB-SET-".count($this->structure_objects)."<br>";
                                $this->structure_objects[count($this->structure_objects)]
                                        =& new ilStructureObject($this->content_object);
                                $this->current_object =& $this->structure_objects[count($this->structure_objects) - 1];
                                $this->current_object->setLMId($this->content_object->getId());
                                // new meta data handling: we create the structure
                                // object already here, this should also create a
                                // md entry
                                $this->current_object->create(true);
                                break;

                        case "PageObject":
                                $this->in_page_object = true;
                                $this->cur_qid = "";
                                if (($this->coType != "tst") and ($this->coType != "qpl"))
                                {
                                        $this->lm_page_object =& new ilLMPageObject($this->content_object);
                                        $this->page_object =& new ilPageObject($this->content_object->getType());
                                        $this->lm_page_object->setLMId($this->content_object->getId());
                                        $this->lm_page_object->assignPageObject($this->page_object);
                                        $this->current_object =& $this->lm_page_object;                                 
                                }
                                else
                                {
                                        $this->page_object =& new ilPageObject("qpl");
                                }
                                break;

                        case "PageAlias":
                                if (($this->coType != "tst") and ($this->coType != "qpl"))
                                {
                                        $this->lm_page_object->setAlias(true);
                                        $this->lm_page_object->setOriginID($a_attribs["OriginId"]);
                                }
                                break;

                        case "MediaObject":
                                $this->in_media_object = true;
                                $this->media_meta_start = true;
                                $this->media_meta_cache = array();
                                $this->media_object =& new ilObjMediaObject();
                                break;

                        case "MediaAlias":
//echo "<br>---NEW MEDIAALIAS---<br>";
                                $this->media_object->setAlias(true);
                                $this->media_object->setImportId($a_attribs["OriginId"]);
                                if (is_object($this->page_object))
                                {
                                        $this->page_object->needsImportParsing(true);
                                }
                                break;

                        case "MediaItem":
                        case "MediaAliasItem":
                                $this->in_media_item = true;
                                $this->media_item =& new ilMediaItem();
                                $this->media_item->setPurpose($a_attribs["Purpose"]);
                                break;

                        case "Layout":
                                if (is_object($this->media_object) && $this->in_media_object)
                                {
                                        $this->media_item->setWidth($a_attribs["Width"]);
                                        $this->media_item->setHeight($a_attribs["Height"]);
                                        $this->media_item->setHAlign($a_attribs["HorizontalAlign"]);
                                }
                                break;

                        case "Parameter":
                                if (is_object($this->media_object) && $this->in_media_object)
                                {
                                        $this->media_item->setParameter($a_attribs["Name"], $a_attribs["Value"]);
                                }
                                break;

                        case "MapArea":
                                $this->in_map_area = true;
                                $this->map_area =& new ilMapArea();
                                $this->map_area->setShape($a_attribs["Shape"]);
                                $this->map_area->setCoords($a_attribs["Coords"]);
                                break;

                        case "Glossary":
                                $this->in_glossary = true;
                                if ($this->content_object->getType() != "glo")
                                {
                                        $this->glossary_object =& new ilObjGlossary();
                                        $this->glossary_object->setTitle("");
                                        $this->glossary_object->setDescription("");
                                        $this->glossary_object->create(true);
                                        $this->glossary_object->createReference();
                                        $parent =& $this->tree->getParentNodeData($this->content_object->getRefId());
                                        $this->glossary_object->putInTree($parent["child"]);
                                        $this->glossary_object->setPermissions($parent["child"]);
                                        $this->glossary_object->notify("new", $_GET["ref_id"],$_GET["parent_non_rbac_id"],$_GET["ref_id"],$this->glossary_object->getRefId());
                                }
                                $this->current_object =& $this->glossary_object;
                                break;

                        case "GlossaryItem":
                                $this->glossary_term =& new ilGlossaryTerm();
                                $this->glossary_term->setGlossaryId($this->glossary_object->getId());
                                $this->glossary_term->setLanguage($a_attribs["Language"]);
                                $this->glossary_term->setImportId($a_attribs["Id"]);
                                $this->link_targets[$a_attribs["Id"]] = $a_attribs["Id"];
                                break;

                        case "Definition":
                                $this->in_glossary_definition = true;
                                $this->glossary_definition =& new ilGlossaryDefinition();
                                $this->page_object =& new ilPageObject("gdf");
                                $this->page_object->setParentId($this->glossary_term->getGlossaryId());
                                $this->glossary_definition->setTermId($this->glossary_term->getId());
                                $this->glossary_definition->assignPageObject($this->page_object);
                                $this->current_object =& $this->glossary_definition;
                                $this->glossary_definition->create(true);
                                break;

                        case "FileItem":
                                $this->in_file_item = true;
                                $this->file_item =& new ilObjFile();
                                $this->file_item->setTitle("dummy");
                                $this->file_item->setMode("filelist");
                                if (is_object($this->page_object))
                                {
                                        $this->page_object->needsImportParsing(true);
                                }
                                break;

                        case "Paragraph":
                                if ($a_attribs["Characteristic"] == "Code")
                                {
                                        $this->inside_code = true;
                                }
                                break;

                        case "Properties":
                                $this->in_properties = true;
                                break;
                                
                        case "Property":
                                if ($this->content_object->getType() == "lm"
                                        || $this->content_object->getType() == "dbk")
                                {
                                        switch($a_attribs["Name"])
                                        {
                                                case "Layout":
                                                        $this->content_object->setLayout($a_attribs["Value"]);
                                                        break;

                                                case "PageHeader":
                                                        $this->content_object->setPageHeader($a_attribs["Value"]);
                                                        break;
                                                        
                                                case "TOCMode":
                                                        $this->content_object->setTOCMode($a_attribs["Value"]);
                                                        break;
                                                        
                                                case "ActiveLMMenu":
                                                        $this->content_object->setActiveLMMenu(
                                                                ilUtil::yn2tf($a_attribs["Value"]));
                                                        break;
                                                        
                                                case "ActiveNumbering":
                                                        $this->content_object->setActiveNumbering(
                                                                ilUtil::yn2tf($a_attribs["Value"]));
                                                        break;
                                                
                                                case "ActiveTOC":
                                                        $this->content_object->setActiveTOC(
                                                                ilUtil::yn2tf($a_attribs["Value"]));
                                                        break;
                                                        
                                                case "ActivePrintView":
                                                        $this->content_object->setActivePrintView(
                                                                ilUtil::yn2tf($a_attribs["Value"]));
                                                        break;
                                                        
                                                case "CleanFrames":
                                                        $this->content_object->setCleanFrames(
                                                                ilUtil::yn2tf($a_attribs["Value"]));
                                                        break;
                                                        
                                                case "PublicNotes":
                                                        $this->content_object->setPublicNotes(
                                                                ilUtil::yn2tf($a_attribs["Value"]));
                                                        break;
                                                        
                                                case "HistoryUserComments":
                                                        $this->content_object->setHistoryUserComments(
                                                                ilUtil::yn2tf($a_attribs["Value"]));
                                                        break;
                                                        
                                                case "HeaderPage":
                                                        if ($a_attribs["Value"] != "")
                                                        {
                                                                if ($this->pg_mapping[$a_attribs["Value"]] > 0)
                                                                {
                                                                        $this->content_object->setHeaderPage(
                                                                                $this->pg_mapping[$a_attribs["Value"]]);
                                                                }
                                                        }
                                                        break;

                                                case "FooterPage":
                                                        if ($a_attribs["Value"] != "")
                                                        {
                                                                if ($this->pg_mapping[$a_attribs["Value"]] > 0)
                                                                {
                                                                        $this->content_object->setFooterPage(
                                                                                $this->pg_mapping[$a_attribs["Value"]]);
                                                                }
                                                        }
                                                        break;
                                        }
                        //echo "<br>+".$a_attribs["Name"]."+";
                                }
                                break;

                        case "MetaData":
                                $this->in_meta_data = true;
//echo "<br>begin meta data section -".$this->current_object->getType()."-";
                                // media obejct meta data handling
                                // is done in the "Identifier" begin tag processing
                                // the rest is done here
                                if(!$this->in_media_object)
                                {
                                        if (($this->coType != "tst") and ($this->coType != "qpl"))
                                        {
                                                // type pg/st
                                                if ($this->current_object->getType() == "st" ||
                                                        $this->current_object->getType() == "pg")
                                                {
                                                        // late creation of page object
                                                        if ($this->current_object->getType() == "pg")
                                                        {
                                                                $this->lm_page_object->create(true);
                                                        }
                                                        $this->md =& new ilMD($this->content_object->getId() ,
                                                                $this->current_object->getId(),
                                                                $this->current_object->getType());
                                                }
                                                // type gdf
                                                else if ($this->current_object->getType() == "gdf")
                                                {
                                                        $this->md =& new ilMD($this->glossary_object->getId() ,
                                                                $this->current_object->getId(),
                                                                $this->current_object->getType());
                                                }
                                                // type lm, dbk, glo
                                                else
                                                {
                                                        if ($this->processMeta())
                                                        {
                                                                $this->md =& new ilMD($this->current_object->getId() ,
                                                                        0,
                                                                        $this->current_object->getType());
                                                        }
                                                }
                                        }
                                        else
                                        {
                                                // type qpl or tst
                                                $this->md =& new ilMD($this->content_object->getId() ,
                                                        0,
                                                        $this->current_object->getType()
                                                );
                                                if ($this->md->getGeneral() != false)
                                                {
                                                        $this->metadata_parsing_disabled = true;
                                                        $this->enableMDParsing(false);
                                                }
                                        }
                                }
                                break;

                        // Identifier
                        case "Identifier":
                        
                                // please note: Meta-Metadata and MetaData are different tags!
                                if (!$this->in_meta_meta_data)
                                {
                                        if ($this->in_meta_data && !$this->in_glossary_definition)
                                        {
                                                if (!$this->in_media_object)
                                                {
                                                        $this->current_object->setImportId($a_attribs["Entry"]);
                                                }
                                                $this->link_targets[$a_attribs["Entry"]] = $a_attribs["Entry"];
                                        }
                                        if ($this->in_file_item)
                                        {
                                                if ($this->file_item_mapping[$a_attribs["Entry"]] == "")
                                                {
                                                        $this->file_item->create();
                                                        $this->file_item->setImportId($a_attribs["Entry"]);
                                                        $this->file_item_mapping[$a_attribs["Entry"]] = $this->file_item->getId();
                                                }
                                        }
                                        if ($this->in_meta_data && $this->in_media_object)
                                        {
//echo "looking for -".$a_attribs["Entry"]."-<br>";

                                                $mob_id = $this->mob_mapping[$a_attribs["Entry"]];
                                        
                                                // within learning module import, usually a media object
                                                // has already been created with a media alias tag
                                                if ($mob_id > 0)
                                                {
                                                        $this->media_object = new ilObjMediaObject($mob_id);
                                                }
                                                else    // in glossaries the media objects precede the definitions
                                                                // so we don't have an object already
                                                {
                                                        $this->media_object = new ilObjMediaObject();
                                                        $this->media_object->create(true, false);
                                                        $this->mob_mapping[$a_attribs["Entry"]]
                                                                = $this->media_object->getId();
                                                }
                                                $this->media_object->setImportId($a_attribs["Entry"]);
                                                $this->md =& new ilMD(0 ,
                                                        $this->media_object->getId(),
                                                        "mob");
                                                $this->emptyMediaMetaCache($a_xml_parser);
                                        }
                                }
                                break;

                        case "Meta-Metadata":
                                $this->in_meta_meta_data = true;
                                break;

                        // Internal Link
                        case "IntLink":
                                if (is_object($this->page_object))
                                {
                                        $this->page_object->setContainsIntLink(true);
                                }
                                if ($this->in_map_area)
                                {
//echo "intlink:maparea:<br>";
                                        $this->map_area->setLinkType(IL_INT_LINK);
                                        $this->map_area->setTarget($a_attribs["Target"]);
                                        $this->map_area->setType($a_attribs["Type"]);
                                        $this->map_area->setTargetFrame($a_attribs["TargetFrame"]);
                                        if (is_object($this->media_object))
                                        {
//echo ":setContainsLink:<br>";
                                                $this->media_object->setContainsIntLink(true);
                                        }
                                }
                                break;

                        // External Link
                        case "ExtLink":
                                if ($this->in_map_area)
                                {
                                        $this->map_area->setLinkType(IL_EXT_LINK);
                                        $this->map_area->setHref($a_attribs["Href"]);
                                        $this->map_area->setExtTitle($a_attribs["Title"]);
                                }
                                break;
                                
                        // Question
                        case "Question":
                                $this->cur_qid = $a_attribs["QRef"];
                                break;

                        case "Location":
                                $this->loc_type = $a_attribs["Type"];
                                break;

                        case "Bibliography":
                                $this->in_bib_item = true;
//echo "<br>---NEW BIBLIOGRAPHY---<br>";
                                $this->bib_item =& new ilBibItem();
                                break;

                }
                $this->beginElement($a_name);

                // append content to page xml content
                if(($this->in_page_object || $this->in_glossary_definition)
                        && !$this->in_meta_data && !$this->in_media_object)
                {
                        if ($a_name == "Definition")
                        {
                                $app_name = "PageObject";
                                $app_attribs = array();
                        }
                        else
                        {
                                $app_name = $a_name;
                                $app_attribs = $a_attribs;
                        }

                        // change identifier entry of file items to new local file id
                        if ($this->in_file_item && $app_name == "Identifier")
                        {
                                $app_attribs["Entry"] = "il__file_".$this->file_item_mapping[$a_attribs["Entry"]];
                                //$app_attribs["Entry"] = "il__file_".$this->file_item->getId();
                        }

                        $this->page_object->appendXMLContent($this->buildTag("start", $app_name, $app_attribs));
//echo "&nbsp;&nbsp;after append, xml:".$this->page_object->getXMLContent().":<br>";
                }

                // append content to bibitem xml content
                if ($this->in_bib_item)   // && !$this->in_page_object && !$this->in_media_object
                {
                        $this->bib_item->appendXMLContent("\n".$this->buildTag("start", $a_name, $a_attribs));
                }
                
                // call meta data handler
                if ($this->in_meta_data && $this->processMeta())
                {
                        // cache beginning of meta data within media object tags
                        // (we need to know the id at the begin of meta elements within
                        // media objects, after the "Identifier" tag has been processed
                        // we send the cached data to the meta xml handler)
                        if ($this->in_media_object && $this->media_meta_start)
                        {
                                $this->media_meta_cache[] =
                                        array("type" => "handlerBeginTag", "par1" => $a_name, "par2" => $a_attribs);
                        }
                        else
                        {
                                if ($a_name == "Identifier")
                                {
                                        if (!$this->in_media_object)
                                        {
                                                $a_attribs["Entry"] = "il__".$this->current_object->getType().
                                                        "_".$this->current_object->getId();
                                        }
                                        else
                                        {
                                                $a_attribs["Entry"] = "il__mob".
                                                        "_".$this->media_object->getId();
                                        }
                                        $a_attribs["Catalog"] = "ILIAS";
                                }

                                parent::handlerBeginTag($a_xml_parser,$a_name,$a_attribs);
                        }
                }
        }

        function processMeta()
        {
                // do not process second meta block in (ilias3) glossaries
                // which comes right after the "Glossary" tag
                if ($this->content_object->getType() == "glo" &&
                        $this->in_glossary && !$this->in_media_object
                        && !$this->in_glossary_definition)
                {
                        return false;
                }
                
                return true;
        }


        function handlerEndTag($a_xml_parser,$a_name)
        {
                // call meta data handler
                if ($this->in_meta_data && $this->processMeta())
                {
                        // cache beginning of meta data within media object tags
                        // (we need to know the id, after that we send the cached data
                        // to the meta xml handler)
                        if ($this->in_media_object && $this->media_meta_start)
                        {
                                $this->media_meta_cache[] =
                                        array("type" => "handlerEndTag", "par1" => $a_name);
                        }
                        else
                        {
                                parent::handlerEndTag($a_xml_parser,$a_name);
                        }
                }

//echo "<b>END TAG: $a_name <br></b>"; flush();
                // append content to page xml content
                if (($this->in_page_object || $this->in_glossary_definition)
                        && !$this->in_meta_data && !$this->in_media_object)
                {
                        $app_name = ($a_name == "Definition")
                                ? "PageObject"
                                : $a_name;
                        $this->page_object->appendXMLContent($this->buildTag("end", $app_name));
                }

                // append content to bibitemxml content
                if ($this->in_bib_item) // && !$this->in_page_object && !$this->in_media_object
                {
                        if($a_name == "BibItem")
                        {
                                $this->bib_item->appendXMLContent("\n".$this->buildTag("end", $a_name));
                        }
                        else
                        {
                                $this->bib_item->appendXMLContent($this->buildTag("end", $a_name));
                        }

                }

                switch($a_name)
                {
                        case "StructureObject":
                                //unset($this->meta_data);
                                unset($this->structure_objects[count($this->structure_objects) - 1]);
                                break;

                        case "PageObject":

                                $this->in_page_object = false;
                                if (($this->coType != "tst") and ($this->coType != "qpl"))
                                {
                                        if (!$this->lm_page_object->isAlias())
                                        {
                                                //$this->page_object->createFromXML();
                                                $this->page_object->updateFromXML();
                                                $this->pg_mapping[$this->lm_page_object->getImportId()]
                                                        = $this->lm_page_object->getId();
        
                                                // collect pages with internal links
                                                if ($this->page_object->containsIntLink())
                                                {
                                                        $this->pages_to_parse["lm:".$this->page_object->getId()] = "lm:".$this->page_object->getId();
                                                }
                                                
                                                // collect pages with mobs or files
                                                if ($this->page_object->needsImportParsing())
                                                {
                                                        $this->pages_to_parse["lm:".$this->page_object->getId()] = "lm:".$this->page_object->getId();
                                                }
                                                
                                        }
                                }
                                else
                                {
                                        $xml = $this->page_object->getXMLContent();
                                        if ($this->cur_qid != "")
                                        {
                                                $ids = $this->qst_mapping[$this->cur_qid];
                                                if ($ids["pool"] > 0)
                                                {
                                                        // question pool question
                                                        $page = new ilPageObject("qpl", $ids["pool"]);
                                                        $xmlcontent = str_replace($this->cur_qid, 
                                                                "il__qst_".$ids["pool"], $xml);
                                                        $page->setXMLContent($xmlcontent);
                                                        $page->saveMobUsage($xmlcontent);
                                                        $page->updateFromXML();
                                                        unset($page);
                                                }
                                                if ($ids["test"] > 0)
                                                {
                                                        // test question
                                                        $page = new ilPageObject("qpl", $ids["test"]);
                                                        $xmlcontent = str_replace($this->cur_qid, 
                                                                "il__qst_".$ids["test"], $xml);
                                                        $page->setXMLContent($xmlcontent);
                                                        $page->saveMobUsage($xmlcontent);
                                                        $page->updateFromXML();
                                                        unset($page);
                                                }
                                        }
                                }

                                // if we are within a structure object: put page in tree
                                $cnt = count($this->structure_objects);
                                if ($cnt > 0)
                                {
                                        $parent_id = $this->structure_objects[$cnt - 1]->getId();
                                        if ($this->lm_page_object->isAlias())
                                        {
                                                $this->pg_into_tree[$parent_id][] = array("type" => "pg_alias", "id" => $this->lm_page_object->getOriginId());
                                        }
                                        else
                                        {
                                                $this->pg_into_tree[$parent_id][] = array("type" => "pg", "id" => $this->lm_page_object->getId());
                                        }
                                }

                                unset($this->page_object);
                                unset($this->lm_page_object);
                                unset ($this->container[count($this->container) - 1]);
                                break;

                        case "MediaObject":
                                $this->in_media_object = false;
//echo "ENDMediaObject:ImportId:".$this->media_object->getImportId()."<br>";
                                // create media object on first occurence of an Id
                                
                                
                                if(empty($this->mob_mapping[$this->media_object->getImportId()]))
                                {
//echo "No mapping found --creating media object:title:".$this->media_object->getTitle().":<br>";

                                        // create media object
                                        // media items are saves for mobs outside of
                                        // pages only
                                        $this->media_object->create(true, false);
                                        
//echo "<br>creating mob ".$this->media_object->getId().":".$this->media_object->getTitle().":";

                                        // collect mobs with internal links
                                        if ($this->media_object->containsIntLink())
                                        {
//echo "got int link :".$this->media_object->getId().":<br>";
                                                $this->mobs_with_int_links[] = $this->media_object->getId();
                                        }

                                        $this->mob_mapping[$this->media_object->getImportId()]
                                                        = $this->media_object->getId();
//echo "create:import_id:".$this->media_object->getImportId().":ID:".$this->mob_mapping[$this->media_object->getImportId()]."<br>";
                                }
                                else
                                {
//echo "Mapping found<br>";
                                        // get the id from mapping
                                        $this->media_object->setId($this->mob_mapping[$this->media_object->getImportId()]);

                                        // update "real" (no alias) media object
                                        // (note: we overwrite any data from the media object
                                        // created by an MediaAlias, only the data of the real
                                        // object is stored in db separately; data of the
                                        // MediaAliases are within the page XML
                                        if (!$this->media_object->isAlias())
                                        {                                               
                                                // now the media items are saved within the db
                                                $this->media_object->update();
                                                
//echo "<br>update media object :".$this->media_object->getId().":";

                                                // collect mobs with internal links
                                                if ($this->media_object->containsIntLink())
                                                {
//echo "got int link :".$this->media_object->getId().":<br>";
                                                        $this->mobs_with_int_links[] = $this->media_object->getId();
                                                }
                                        }
                                }

                                // append media alias to page, if we are in a page
                                if ($this->in_page_object || $this->in_glossary_definition)
                                {
                                        $this->page_object->appendXMLContent($this->media_object->getXML(IL_MODE_ALIAS));
//echo "Appending:".htmlentities($this->media_object->getXML(IL_MODE_ALIAS))."<br>";
                                }

                                break;

                        case "MediaItem":
                        case "MediaAliasItem":
                                $this->in_media_item = false;
                                $this->media_object->addMediaItem($this->media_item);
//echo "adding media item -".$this->media_item->getId()."-".$this->media_item->getLocation()."- to object -".$this->media_object->getId()."-";
                                break;

                        case "MapArea":
                                $this->in_map_area = false;
                                $this->media_item->addMapArea($this->map_area);
                                break;

                        case "Properties":
                                $this->in_properties = false;
                                if ($this->content_object->getType() == "lm"
                                        || $this->content_object->getType() == "dbk")
                                {
                                        $this->content_object->update();
                                }
                                break;

                        case "MetaData":
                                $this->in_meta_data = false;
                                if(strtolower(get_class($this->current_object)) == "illmpageobject" && !$this->in_media_object)
                                {
                                        // Metadaten eines PageObjects sichern in NestedSet
                                        if (is_object($this->lm_page_object))
                                        {
                                                // update title/description of page object
                                                $this->current_object->MDUpdateListener('General');
                                                ilLMObject::_writeImportId($this->current_object->getId(),
                                                        $this->current_object->getImportId());
                                        }
                                }
                                else if((strtolower(get_class($this->current_object)) == "ilobjquestionpool" ||
                                        strtolower(get_class($this->current_object)) == "ilobjtest") &&
                                        !$this->in_media_object)
//                                      !$this->in_media_object && !$this->in_page_object)
// changed for imports of ILIAS 2 Tests where PageObjects could have
// Metadata sections (Helmut Schottmüller, 2005-12-02)
                                {
                                        if ($this->metadata_parsing_disabled)
                                        {
                                                $this->enableMDParsing(true);
                                        }
                                        else
                                        {
                                                if ($this->in_page_object)
                                                {
                                                        $this->page_object->MDUpdateListener('General');
                                                        ilLMObject::_writeImportId($this->page_object->getId(),
                                                                        $this->page_object->getImportId());
                                                }
                                                else
                                                {
                                                        $this->current_object->MDUpdateListener('General');
                                                        ilLMObject::_writeImportId($this->current_object->getId(),
                                                                        $this->current_object->getImportId());
                                                }
                                        }
                                }
                                else if(strtolower(get_class($this->current_object)) == "ilstructureobject")
                                {    // save structure object at the end of its meta block
                                        // determine parent
                                        $cnt = count($this->structure_objects);
                                        if ($cnt > 1)
                                        {
                                                $parent_id = $this->structure_objects[$cnt - 2]->getId();
                                        }
                                        else
                                        {
                                                $parent_id = $this->lm_tree->getRootId();
                                        }

                                        // create structure object and put it in tree
                                        //$this->current_object->create(true); // now on top
                                        $this->st_into_tree[] = array ("id" => $this->current_object->getId(),
                                                "parent" => $parent_id);

                                        // update title/description of structure object
                                        $this->current_object->MDUpdateListener('General');
                                        ilLMObject::_writeImportId($this->current_object->getId(),
                                                        $this->current_object->getImportId());
                                }
                                else if(strtolower(get_class($this->current_object)) == "ilobjdlbook" || strtolower(get_class($this->current_object)) == "ilobjlearningmodule" ||
                                        strtolower(get_class($this->current_object)) == "ilobjcontentobject" ||
                                        (strtolower(get_class($this->current_object)) == "ilobjglossary" && $this->in_glossary))
                                {
                                        // todo: saving of md? getting title/descr and
                                        // set it for current object
                                }
                                else if(strtolower(get_class($this->current_object)) == "ilglossarydefinition" && !$this->in_media_object)
                                {
                                        // now on top
                                        //$this->glossary_definition->create();

                                        $this->page_object->setId($this->glossary_definition->getId());
                                        $this->page_object->updateFromXML();

                                        // todo: saving of md? getting title/descr and
                                        // set it for current object
                                }


                                if(strtolower(get_class($this->current_object)) == "ilobjlearningmodule" ||
                                        strtolower(get_class($this->current_object)) == "ilobjdlbook" ||
                                        strtolower(get_class($this->current_object)) == "ilobjglossary")
                                {
                                        if (strtolower(get_class($this->current_object)) == "ilobjglossary" &&
                                                $this->content_object->getType() != "glo")
                                        {
//echo "<br><b>getting2: ".$this->content_object->getTitle()."</b>";
                                                $this->current_object->setTitle($this->content_object->getTitle()." - ".
                                                        $this->lng->txt("glossary"));
                                        }

                                        $this->current_object->MDUpdateListener('General');
                                        /*
                                        if (!$this->in_media_object && $this->processMeta())
                                        {
                                                $this->current_object->update();
                                        }
                                        */
                                }
                                
                                if ($this->in_media_object)
                                {
//echo "<br>call media object update listener";
                                        $this->media_object->MDUpdateListener('General');
                                }
                                
                                if ($this->in_glossary_definition)
                                {
                                        $this->glossary_definition->MDUpdateListener('General');
                                }

                                break;

                        case "Meta-Metadata":
                                $this->in_meta_meta_data = false;
                                break;

                        case "FileItem":
                                $this->in_file_item = false;
                                // only update new file items
                                if ($this->file_item->getImportId($a_attribs["Entry"] != ""))
                                {
                                        $this->file_item->update();
                                }
                                break;

                        case "Bibliography":

                                $this->in_bib_item = false;

                                $nested = new ilNestedSetXML();
                                $nested->import($this->bib_item->getXMLContent(),$this->content_object->getId(),"bib");
                                break;

                        case "Table":
                                unset ($this->container[count($this->container) - 1]);
                                break;

                        case "Glossary":
                                $this->in_glossary = false;
                                break;

                        case "GlossaryTerm":
                                $this->glossary_term->setTerm(trim($this->chr_data));
                                $this->glossary_term->create();
                                break;

                        case "Paragraph":
                                $this->inside_code = false;
                                break;

                        case "Definition":
                                $this->in_glossary_definition = false;
                                $this->page_object->updateFromXML();
                                $this->page_object->buildDom();
                                $this->glossary_definition->setShortText($this->page_object->getFirstParagraphText());
                                $this->glossary_definition->update();
                                //$this->pg_mapping[$this->lm_page_object->getImportId()]
                                //      = $this->lm_page_object->getId();
                                if ($this->page_object->containsIntLink())
                                {
//echo "<br>Definition contains Int Link:".$this->page_object->getId();
                                        $this->pages_to_parse["gdf:".$this->page_object->getId()] = "gdf:".$this->page_object->getId();
                                }
                                if ($this->page_object->needsImportParsing())
                                {
                                        $this->pages_to_parse["gdf:".$this->page_object->getId()] = "gdf:".$this->page_object->getId();
                                }
                                break;

                        case "Format":
                                if ($this->in_media_item)
                                {
                                        $this->media_item->setFormat(trim($this->chr_data));
                                }
                                if ($this->in_file_item)
                                {
                                        $this->file_item->setFileType(trim($this->chr_data));
                                }
                                break;

                        case "Title":
                                if (!$this->in_media_object)
                                {
                                        $this->current_object->setTitle(trim($this->chr_data));
                                        //$this->meta_data->setTitle(trim($this->chr_data));
                                }
                                else
                                {
                                        $this->media_object->setTitle(trim($this->chr_data));
                                        //$this->meta_data->setTitle(trim($this->chr_data));
                                }
                                break;

                        case "Language":
                                /*
                                if (is_object($this->meta_data))
                                {
                                        $this->meta_data->setLanguage(trim($this->chr_data));
                                }*/
                                
                                if (is_object($this->bib_item))
                                {
                                        $this->bib_item->setLanguage(trim($this->chr_data));
                                }
                                break;

                        case "Description":
                                //$this->meta_data->setDescription(trim($this->chr_data));
                                break;

                        case "Caption":
                                if ($this->in_media_object)
                                {
                                        $this->media_item->setCaption(trim($this->chr_data));
                                }
                                break;

                        // Location
                        case "Location":
                                // TODO: adapt for files in "real" subdirectories
                                if ($this->in_media_item)
                                {
                                        $this->media_item->setLocationType($this->loc_type);
                                        $this->media_item->setLocation(trim($this->chr_data));
                                }
                                if ($this->in_file_item)
                                {
                                        // set file name from xml file
                                        $this->file_item->setFileName(trim($this->chr_data));
                                        
                                        // special handling for file names with special characters
                                        // (e.g. "&gt;")
                                        if ($this->file_item->getType() == "file" &&
                                                is_int(strpos($this->chr_data, "&")) &&
                                                is_int(strpos($this->chr_data, ";")))
                                        {
                                                $imp_dir = $this->content_object->getImportDirectory();
                                                $source_dir = $imp_dir."/".$this->subdir."/objects/".
                                                        $this->file_item->getImportId();
                                                
                                                // read "physical" file name from directory
                                                if ($dir = opendir($source_dir))
                                                {
                                                   while (false !== ($file = readdir($dir)))
                                                   {
                                                           if ($file != "." && $file != "..")
                                                           {
                                                                   $this->file_item->setFileName($file);
                                                           }
                                                   }
                                                   closedir($dir);
                                                }
                                        }
                                        
                                        // set file item title
                                        $this->file_item->setTitle(trim($this->chr_data));
                                }
                                break;

                }
                $this->endElement($a_name);
                $this->chr_data = "";
        }

        function handlerCharacterData($a_xml_parser,$a_data)
        {
                // call meta data handler
                if ($this->in_meta_data && $this->processMeta())
                {
                        // cache beginning of meta data within media object tags
                        // (we need to know the id, after that we send the cached data
                        // to the meta xml handler)
                        if ($this->in_media_object && $this->media_meta_start)
                        {
                                $this->media_meta_cache[] =
                                        array("type" => "handlerCharacterData", "par1" => $a_data);
                        }
                        else
                        {
                                parent::handlerCharacterData($a_xml_parser,$a_data);
                        }
                }

                // the parser converts "&gt;" to ">" and "&lt;" to "<"
                // in character data, but we don't want that, because it's the
                // way we mask user html in our content, so we convert back...

                $a_data = str_replace("<","&lt;",$a_data);
                $a_data = str_replace(">","&gt;",$a_data);


                // DELETE WHITESPACES AND NEWLINES OF CHARACTER DATA
                $a_data = preg_replace("/\n/","",$a_data);
                if (!$this->inside_code)
                {
                        $a_data = preg_replace("/\t+/","",$a_data);
                }

                $this->chr_data .= $a_data;

                if(!empty($a_data) || $a_data === "0")
                {
                        // append all data to page, if we are within PageObject,
                        // but not within MetaData or MediaObject
                        if (($this->in_page_object || $this->in_glossary_definition)
                                && !$this->in_meta_data && !$this->in_media_object)
                        {
                                $this->page_object->appendXMLContent($a_data);
                        }

                        if ($this->in_meta_data)
                        {
                                //$this->meta_data->appendXMLContent($a_data);
//echo "<br>".$a_data;
                        }

                        if ($this->in_bib_item  )
                        {
                                $this->bib_item->appendXMLContent($a_data);
                        }

                        switch($this->getCurrentElement())
                        {

                                case "IntLink":
                                case "ExtLink":
                                        if($this->in_map_area)
                                        {
                                                $this->map_area->appendTitle($a_data);
                                        }
                                        break;

                        }
                }

        }
        
        
        function emptyMediaMetaCache(&$a_xml_parser)
        {
                foreach ($this->media_meta_cache as $cache_entry)
                {
                        switch($cache_entry["type"])
                        {
                                case "handlerBeginTag": 
                                        parent::handlerBeginTag($a_xml_parser, 
                                                $cache_entry["par1"], $cache_entry["par2"]);
                                        break;
                                        
                                case "handlerEndTag":
                                        parent::handlerEndTag($a_xml_parser, 
                                                $cache_entry["par1"]);
                                        break;
                                        
                                case "handlerCharacterData":
                                        parent::handlerCharacterData($a_xml_parser,
                                                $cache_entry["par1"]);
                                        break;
                        }
                }

                $this->media_meta_start = false;
                $this->media_meta_cache[] = array();
        }
        

}
?>