<?php
# Lifter002: TODO
# Lifter007: TODO
# Lifter003: TODO
# Lifter010: TODO
/*
    +-----------------------------------------------------------------------------+
    | 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. |
    +-----------------------------------------------------------------------------+
*/


/**
* Object XML Parser
*
* @author Stefan Meyer <smeyer@databay.de>
*
* @extends ilSaxParser
* @package common
*/

class Ilias3ObjectXMLParser extends Ilias3SaxParser
{
    var $object_data = [];
    var $curr_obj;
    var $reference_count;
    var $cdata = '';

    /**
     * Constructor
     *
     * @param object $a_content_object           must be of type ilObjContentObject
     *                                           ilObjTest or ilObjQuestionPool
     * @param string $a_xml_file                 xml data
     * @param string $a_subdir                   subdirectory in import directory
     *
     * @access   public
     */
    function __construct($a_xml_data = '')
    {
        parent::__construct();
        $this->setXMLContent($a_xml_data);
    }

    function getObjectData()
    {
        return $this->object_data ? $this->object_data : [];
    }

    /**
     * set event handlers
     *
     * @param resource    reference to the xml parser
     *
     * @access   private
     */
    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');
    }


    /**
     * handler for begin of element
     *
     * @param resource $a_xml_parser xml parser
     * @param string   $a_name       element name
     * @param array    $a_attribs    element attributes array
     */
    function handlerBeginTag($a_xml_parser, $a_name, $a_attribs)
    {

        switch ($a_name) {
            case 'Objects':
                $this->curr_obj = -1;
                break;

            case 'Object':
                ++$this->curr_obj;
                $this->reference_count = -1;

                $this->addProperty__('type', $a_attribs['type']);
                $this->addProperty__('obj_id', $a_attribs['obj_id']);
                break;

            case 'Title':
                break;

            case 'Description':
                break;

            case 'Owner':
                break;

            case 'CreateDate':
                break;

            case 'LastUpdate':
                break;

            case 'ImportId':
                break;

            case 'References':
                ++$this->reference_count;
                $this->addReference__($a_attribs['ref_id'], $a_attribs['accessInfo']);
                break;

            case 'Operation':
                break;
        }
    }


    /**
     * handler for end of element
     *
     * @param resource $a_xml_parser xml parser
     * @param string   $a_name       element name
     */
    function handlerEndTag($a_xml_parser, $a_name)
    {
        switch ($a_name) {
            case 'Objects':
                break;

            case 'Object':
                break;

            case 'Title':
                $this->addProperty__('title', trim($this->cdata));
                break;

            case 'Description':
                $this->addProperty__('description', trim($this->cdata));
                break;

            case 'Owner':
                $this->addProperty__('owner', trim($this->cdata));
                break;

            case 'CreateDate':
                $this->addProperty__('create_date', trim($this->cdata));
                break;

            case 'LastUpdate':
                $this->addProperty__('last_update', trim($this->cdata));
                break;

            case 'ImportId':
                $this->addProperty__('import_id', trim($this->cdata));
                break;

            case 'References':
                $this->addReference__(trim($this->cdata));
                break;

            case 'Operation':
                $this->addOperation__(trim($this->cdata));
                break;
        }

        $this->cdata = '';

        return;
    }

    /**
     * handler for character data
     *
     * @param resource $a_xml_parser xml parser
     * @param string   $a_data       character data
     */
    function handlerCharacterData($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;
        }


    }

    // PRIVATE
    function addProperty__($a_name, $a_value)
    {
        $this->object_data[$this->curr_obj][$a_name] = $a_value;
        /*/
            if (is_array($this->object_data[$this->curr_obj][$a_name]))
                $this->object_data[$this->curr_obj][$a_name][] = $a_value;
            elseif ($this->object_data[$this->curr_obj][$a_name] != "")
            {
                $old_value = $this->object_data[$this->curr_obj][$a_name];
                $this->object_data[$this->curr_obj][$a_name] = array($old_value);
                $this->object_data[$this->curr_obj][$a_name][] = $a_value;
            }
            else
                $this->object_data[$this->curr_obj][$a_name] = $a_value;
            /**/
    }

    function addReference__($a_value, $a_accessinfo = "")
    {
        if ($a_value) {
            $this->object_data[$this->curr_obj]['references'][$this->reference_count]["ref_id"] = $a_value;
            $this->object_data[$this->curr_obj]['references'][$this->reference_count]["accessInfo"] = $a_accessinfo;
        }
    }

    function addOperation__($a_value)
    {
        if ($a_value) {
            $this->object_data[$this->curr_obj]['references'][$this->reference_count]["operations"][] = $a_value;
        }
    }
}