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   1  <?php // $Id: view_statement_xml.class.php,v 1.4 2007/10/10 05:25:31 nicolasconnault Exp $
   2  
   3  ///////////////////////////////////////////////////////////////////////////
   4  //                                                                       //
   5  // NOTICE OF COPYRIGHT                                                   //
   6  //                                                                       //
   7  // Moodle - Modular Object-Oriented Dynamic Learning Environment         //
   8  //          http://moodle.com                                            //
   9  //                                                                       //
  10  // Copyright (C) 1999 onwards Martin Dougiamas        http://dougiamas.com  //
  11  //           (C) 2001-3001 Eloy Lafuente (stronk7) http://contiento.com  //
  12  //                                                                       //
  13  // This program is free software; you can redistribute it and/or modify  //
  14  // it under the terms of the GNU General Public License as published by  //
  15  // the Free Software Foundation; either version 2 of the License, or     //
  16  // (at your option) any later version.                                   //
  17  //                                                                       //
  18  // This program is distributed in the hope that it will be useful,       //
  19  // but WITHOUT ANY WARRANTY; without even the implied warranty of        //
  20  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         //
  21  // GNU General Public License for more details:                          //
  22  //                                                                       //
  23  //          http://www.gnu.org/copyleft/gpl.html                         //
  24  //                                                                       //
  25  ///////////////////////////////////////////////////////////////////////////
  26  
  27  /// This class will display the XML for one statement being edited
  28  
  29  class view_statement_xml extends XMLDBAction {
  30  
  31      /**
  32       * Init method, every subclass will have its own
  33       */
  34      function init() {
  35          parent::init();
  36  
  37      /// Set own custom attributes
  38  
  39      /// Get needed strings
  40          $this->loadStrings(array(
  41          /// 'key' => 'module',
  42          ));
  43      }
  44  
  45      /**
  46       * Invoke method, every class will have its own
  47       * returns true/false on completion, setting both
  48       * errormsg and output as necessary
  49       */
  50      function invoke() {
  51          parent::invoke();
  52  
  53          $result = true;
  54  
  55      /// Set own core attributes
  56          $this->does_generate = ACTION_GENERATE_XML;
  57  
  58      /// These are always here
  59          global $CFG, $XMLDB;
  60  
  61      /// Do the job, setting result as needed
  62  
  63      /// Get the file parameter
  64          $statement =  required_param('statement', PARAM_CLEAN);
  65          $select = required_param('select', PARAM_ALPHA); //original/edited
  66      /// Get the dir containing the file
  67          $dirpath = required_param('dir', PARAM_PATH);
  68          $dirpath = $CFG->dirroot . stripslashes_safe($dirpath);
  69  
  70      /// Get the correct dir
  71          if ($select == 'original') {
  72              if (!empty($XMLDB->dbdirs)) {
  73                  $base =& $XMLDB->dbdirs[$dirpath];
  74              }
  75          } else if ($select == 'edited') {
  76              if (!empty($XMLDB->editeddirs)) {
  77                  $base =& $XMLDB->editeddirs[$dirpath];
  78              }
  79          } else {
  80              $this->errormsg = 'Cannot access to ' . $select . ' info';
  81              $result = false;
  82          }
  83          if ($base) {
  84          /// Only if the directory exists and it has been loaded
  85              if (!$base->path_exists || !$base->xml_loaded) {
  86                  $this->errormsg = 'Directory ' . $dirpath . ' not loaded';
  87                  return false;
  88              }
  89          } else {
  90              $this->errormsg = 'Problem handling ' . $select . ' files';
  91              return false;
  92          }
  93  
  94      /// Get the structure
  95          if ($result) {
  96              if (!$structure =& $base->xml_file->getStructure()) {
  97                  $this->errormsg = 'Error retrieving ' . $select . ' structure';
  98                  $result = false;
  99              }
 100          }
 101      /// Get the statements
 102          if ($result) {
 103              if (!$statements =& $structure->getStatements()) {
 104                  $this->errormsg = 'Error retrieving ' . $select . ' statements';
 105                  $result = false;
 106              }
 107          }
 108      /// Get the statement
 109          if ($result && !$t =& $structure->getStatement($statement)) {
 110              $this->errormsg = 'Error retrieving ' . $statement . ' statement';
 111              $result = false;
 112          }
 113  
 114          if ($result) {
 115          /// Everything is ok. Generate the XML output
 116              $this->output = $t->xmlOutput();
 117          } else {
 118          /// Switch to HTML and error
 119              $this->does_generate = ACTION_GENERATE_HTML;
 120          }
 121  
 122      /// Return ok if arrived here
 123          return $result;
 124      }
 125  }
 126  ?>