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.ilAdvancedMDFieldDefinition.php");
include_once("Services/AdvancedMetaData/classes/class.ilAdvancedMDValues.php");

class ilAdvancedMDParser extends ilSaxParser implements ilSaxSubsetParser
{       
        protected $obj_id; // [int]
        protected $rec_id; // [int]
        protected $mapping; // [object] 
        protected $cdata; // [string]   
        protected $value_records = array(); // [array]
        protected $current_record; // [ilAdvancedMDValues]
        protected $current_value; // [ilAdvancedMDFieldDefinition]
        protected $has_values; // [bool]
        protected $record_ids = array(); // [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);         
        }
        
        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($a_name)
                {
                        case 'AdvancedMetaData':
                                // we need to write all records that have been created (1 for each sub-item)
                                foreach($this->value_records as $record)
                                {
                                        $record->write();
                                }
                                break;
                                
                        case 'Value':
                                $value = trim($this->cdata);
                                if(is_object($this->current_value) && $value != "")
                                {
                                        $this->current_value->importValueFromXML($value);                                       
                                }
                                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($field = ilAdvancedMDFieldDefinition::getInstanceByImportId($a_import_id))
                {               
                        $rec_id = $field->getRecordId();
                                                
                        $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;
                                }
                                                        
                                $rec_idx = $rec_id.";".$a_sub_type.";".$new_sub_id;
                                if(!array_key_exists($rec_idx, $this->value_records))   
                                {
                                        $this->value_records[$rec_idx] = new ilAdvancedMDValues($rec_id, $new_parent_id, $a_sub_type, $new_sub_id);
                                }                               
                        }
                        else
                        {                       
                                $rec_idx = $rec_id.";;";
                                if(!array_key_exists($rec_idx, $this->value_records))   
                                {
                                        $this->value_records[$rec_idx] = new ilAdvancedMDValues($rec_id, $new_parent_id);
                                }                               
                        }                                               
                        
                        // init ADTGroup before definitions to bind definitions to group
                        $this->value_records[$rec_idx]->getADTGroup();

                        foreach($this->value_records[$rec_idx]->getDefinitions() as $def)
                        {                                                                               
                                if($a_import_id == $def->getImportId())
                                {
                                        $this->current_value = $def;
                                        break;
                                }
                        }
                        
                        // valid field found, record will be imported
                        if($this->current_value)
                        {                                                               
                                $this->record_ids[$new_parent_id][$a_sub_type][] = $rec_id;
                        }
                }       
        }
        
        public function getRecordIds()
        {
                return $this->record_ids;
        }
}