class.ilAdvancedMDParser.php

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<?php
/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */

include_once("Services/Xml/classes/class.ilSaxParser.php");
include_once("Services/Utilities/classes/class.ilSaxController.php");
include_once("Services/Utilities/interfaces/interface.ilSaxSubsetParser.php");
include_once("Services/AdvancedMetaData/classes/class.ilAdvancedMDValue.php");

class ilAdvancedMDParser extends ilSaxParser implements ilSaxSubsetParser
{       
        protected $obj_id; // [int]
        protected $rec_id; // [int]
        protected $mapping; // [object]
        protected $current_value; // [ilAdvancedMDValue]
        protected $cdata; // [string]
        protected $field_ids; // [array]
        
        function __construct($a_obj_id, $a_mapping)
        {               
                parent::__construct();
                
                $parts = explode(":", $a_obj_id);
                $this->obj_id = $parts[0];              
                $this->mapping = $a_mapping;
        }
        
        function setHandlers($a_xml_parser)
        {
                $this->sax_controller = new ilSaxController();
                $this->sax_controller->setHandlers($a_xml_parser);
                $this->sax_controller->setDefaultElementHandler($this);
                
                /* the value parser does not support sub-types and object-specific record selection
                include_once('Services/AdvancedMetaData/classes/class.ilAdvancedMDValueParser.php');
                $this->sax_controller->setElementHandler(
                        $this->adv_md_handler = new ilAdvancedMDValueParser($this->obj_id),
                        'AdvancedMetaData');            
                */
        }
        
        function handlerBeginTag($a_xml_parser,$a_name,$a_attribs)
        {
                switch($a_name)
                {
                        case 'AdvancedMetaData':                                
                                break;
                                
                        case 'Value':
                                $this->initValue($a_attribs['id'], $a_attribs['sub_type'], $a_attribs['sub_id']);
                                break;
                }
        }
        
        function handlerEndTag($a_xml_parser,$a_name)
        {
                switch($a_name)
                {
                        case 'AdvancedMetaData':
                                break;
                                
                        case 'Value':
                                $value = trim($this->cdata);
                                if(is_object($this->current_value) && $value != "")
                                {
                                        $this->current_value->setValue($value);
                                        $this->current_value->save();
                                }
                                break;
                }
                $this->cdata = '';
        }
        
        function handlerCharacterData($a_xml_parser,$a_data)
        {
                if($a_data != "\n")
                {
                        // Replace multiple tabs with one space
                        $a_data = preg_replace("/\t+/"," ",$a_data);

                        $this->cdata .= $a_data;
                }
        }
        
        protected function initValue($a_import_id, $a_sub_type = "", $a_sub_id = 0)
        {
                $this->current_value = null;
                
                if($field_id = ilAdvancedMDFieldDefinition::_lookupFieldId($a_import_id))
                {
                        $new_parent_id = $this->mapping->getMapping("Services/AdvancedMetaData", "parent", $this->obj_id);
                        if(!$new_parent_id)
                        {
                                return;
                        }
                        
                        if($a_sub_type)
                        {                               
                                $new_sub_id = $this->mapping->getMapping("Services/AdvancedMetaData", "advmd_sub_item", "advmd:".$a_sub_type.":".$a_sub_id);                            
                                if(!$new_sub_id)
                                {
                                        return;
                                }
                                $md_value = new ilAdvancedMDValue($field_id, $new_parent_id, $a_sub_type, $new_sub_id);
                        }
                        else
                        {
                                $md_value = new ilAdvancedMDValue($field_id, $new_parent_id);
                        }                       
                        $this->current_value = $md_value;
                        
                        $this->field_ids[$new_parent_id][$a_sub_type][] = $field_id;
                }       
        }
        
        public function getFieldIds()
        {
                return $this->field_ids;
        }
}