docs/mods/_core/imscc/classes/DiscussionToolsParser.class.php

   1 <?php
   2 /****************************************************************/
   3 /* ATutor                                                                                                               */
   4 /****************************************************************/
   5 /* Copyright (c) 2002-2009                                                                              */
   6 /* Inclusive Design Institute                                   */
   7 /* http://atutor.ca                                                                                             */
   8 /*                                                              */
   9 /* This program is free software. You can redistribute it and/or*/
  10 /* modify it under the terms of the GNU General Public License  */
  11 /* as published by the Free Software Foundation.                                */
  12 /****************************************************************/
  13 // $Id$
  14 include('DiscussionTools.class.php');
  15
  16 /**
  17  * A class for DiscussionToolsParser
  18  * based on:
  19  *  http://www.imsglobal.org/profile/cc/ccv1p0/derived_schema/domainProfile_5/imsdt_v1p0_localised.xsd
  20  */
  21 class DiscussionToolsParser {
  22         //global variables
  23         //private
  24         var $parser; // the XML handler
  25         var $character_data; // tmp variable for storing the data
  26         var $element_path; // array of element paths (basically a stack)
  27         var $title;     //link's title
  28         var $text; //description
  29
  30         //constructor
  31         function DiscussionToolsParser(){
  32                 $this->parser = xml_parser_create();
  33
  34                 xml_set_object($this->parser, $this);
  35                 xml_parser_set_option($this->parser, XML_OPTION_CASE_FOLDING, false); /* conform to W3C specs */
  36                 xml_set_element_handler($this->parser, 'startElement', 'endElement');
  37                 xml_set_character_data_handler($this->parser, 'characterData');
  38         }
  39
  40         // public
  41         // @return      true if parsed successfully, false otherwise
  42         function parse($xml_data) {
  43                 $this->element_path   = array();
  44                 $this->character_data = '';
  45                 xml_parse($this->parser, $xml_data, TRUE);
  46         }
  47
  48         // private
  49         function startElement($parser, $name, $attributes) {
  50                 //save attributes.
  51                 switch($name) {
  52                         case 'text':
  53                                 $this->text_type = $attributes['texttype'];
  54                                 break;
  55                 }
  56                 array_push($this->element_path, $name);
  57    }
  58
  59         // private
  60         /* called when an element ends */
  61         /* removed the current element from the $path */
  62         function endElement($parser, $name) {
  63                 switch($name) {
  64                         case 'title':
  65                                 $this->title = $this->character_data;
  66                                 break;
  67                         case 'text':
  68                                 $this->text = $this->character_data;
  69                                 break;
  70                 }
  71
  72                 //pop stack and reset character data, o/w it will stack up
  73                 array_pop($this->element_path);
  74                 $this->character_data = '';
  75         }
  76
  77         // private
  78         function characterData($parser, $data){
  79                 global $addslashes;
  80                 if (trim($data)!=''){
  81                         $this->character_data .= preg_replace('/[\t\0\x0B(\r\n)]*/', '', $data);
  82 //                      $this->character_data .= trim($data);
  83                 }
  84         }
  85
  86         //public
  87         function close(){
  88                 //Free the XML parser
  89                 xml_parser_free($this->parser);
  90         }
  91
  92         //get title
  93         function getDT(){
  94                 return new DiscussionTools($this->title, $this->text);
  95         }
  96 }
  97 ?>