include/classes/DiscussionTools/DiscussionToolsParser.class.php

   1 <?php
   2 /************************************************************************/
   3 /* AContent                                                             */
   4 /************************************************************************/
   5 /* Copyright (c) 2010                                                   */
   6 /* Inclusive Design Institute                                           */
   7 /*                                                                      */
   8 /* This program is free software. You can redistribute it and/or        */
   9 /* modify it under the terms of the GNU General Public License          */
  10 /* as published by the Free Software Foundation.                        */
  11 /************************************************************************/
  12
  13 include('DiscussionTools.class.php');
  14
  15 /**
  16  * A class for DiscussionToolsParser
  17  * based on:
  18  *  http://www.imsglobal.org/profile/cc/ccv1p0/derived_schema/domainProfile_5/imsdt_v1p0_localised.xsd
  19  */
  20 class DiscussionToolsParser {
  21         //global variables
  22         //private
  23         var $parser; // the XML handler
  24         var $character_data; // tmp variable for storing the data
  25         var $element_path; // array of element paths (basically a stack)
  26         var $title;     //link's title
  27         var $text; //description
  28
  29         //constructor
  30         function DiscussionToolsParser(){
  31                 $this->parser = xml_parser_create();
  32
  33                 xml_set_object($this->parser, $this);
  34                 xml_parser_set_option($this->parser, XML_OPTION_CASE_FOLDING, false); /* conform to W3C specs */
  35                 xml_set_element_handler($this->parser, 'startElement', 'endElement');
  36                 xml_set_character_data_handler($this->parser, 'characterData');
  37         }
  38
  39         // public
  40         // @return      true if parsed successfully, false otherwise
  41         function parse($xml_data) {
  42                 $this->element_path   = array();
  43                 $this->character_data = '';
  44                 xml_parse($this->parser, $xml_data, TRUE);
  45         }
  46
  47         // private
  48         function startElement($parser, $name, $attributes) {
  49                 //save attributes.
  50                 switch($name) {
  51                         case 'text':
  52                                 $this->text_type = $attributes['texttype'];
  53                                 break;
  54                 }
  55                 array_push($this->element_path, $name);
  56    }
  57
  58         // private
  59         /* called when an element ends */
  60         /* removed the current element from the $path */
  61         function endElement($parser, $name) {
  62                 switch($name) {
  63                         case 'title':
  64                                 $this->title = $this->character_data;
  65                                 break;
  66                         case 'text':
  67                                 $this->text = $this->character_data;
  68                                 break;
  69                 }
  70
  71                 //pop stack and reset character data, o/w it will stack up
  72                 array_pop($this->element_path);
  73                 $this->character_data = '';
  74         }
  75
  76         // private
  77         function characterData($parser, $data){
  78                 global $addslashes;
  79                 if (trim($data)!=''){
  80                         $this->character_data .= preg_replace('/[\t\0\x0B(\r\n)]*/', '', $data);
  81 //                      $this->character_data .= trim($data);
  82                 }
  83         }
  84
  85         //public
  86         function close(){
  87                 //Free the XML parser
  88                 xml_parser_free($this->parser);
  89         }
  90
  91         //get title
  92         function getDT(){
  93                 return new DiscussionTools($this->title, $this->text);
  94         }
  95 }
  96 ?>