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   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * This is the main script for the complete XMLDB interface. From here
  19   * all the actions supported will be launched.
  20   *
  21   * @package    tool_xmldb
  22   * @copyright  (C) 1999 onwards Martin Dougiamas http://dougiamas.com,
  23   *             (C) 2001-3001 Eloy Lafuente (stronk7) http://contiento.com
  24   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  25   */
  26  
  27  require('../../../config.php');
  28  require_once($CFG->libdir.'/adminlib.php');
  29  require_once($CFG->libdir.'/ddllib.php');
  30  // Add required XMLDB action classes
  31  require_once ('actions/XMLDBAction.class.php');
  32  require_once ('actions/XMLDBCheckAction.class.php');
  33  
  34  
  35  admin_externalpage_setup('toolxmld');
  36  
  37  // Add other used libraries
  38  require_once($CFG->libdir . '/xmlize.php');
  39  
  40  // Handle session data
  41  global $XMLDB;
  42  
  43  // State is stored in session - we have to serialise it because the classes are not loaded when creating session
  44  if (!isset($SESSION->xmldb)) {
  45      $XMLDB = new stdClass;
  46  } else {
  47      $XMLDB = unserialize($SESSION->xmldb);
  48  }
  49  
  50  // Some previous checks
  51  $site = get_site();
  52  
  53  require_login();
  54  require_capability('moodle/site:config', context_system::instance());
  55  
  56  // Body of the script, based on action, we delegate the work
  57  $action = optional_param ('action', 'main_view', PARAM_ALPHAEXT);
  58  
  59  // Get the action path and invoke it
  60  $actionsroot = "$CFG->dirroot/$CFG->admin/tool/xmldb/actions";
  61  $actionclass = $action . '.class.php';
  62  $actionpath = "$actionsroot/$action/$actionclass";
  63  
  64  // Load and invoke the proper action
  65  if (file_exists($actionpath) && is_readable($actionpath)) {
  66      require_once($actionpath);
  67      if ($xmldb_action = new $action) {
  68          // Invoke it
  69          $result = $xmldb_action->invoke();
  70          // store the result in session
  71          $SESSION->xmldb = serialize($XMLDB);
  72  
  73          if ($result) {
  74              // Based on getDoesGenerate()
  75              switch ($xmldb_action->getDoesGenerate()) {
  76                  case ACTION_GENERATE_HTML:
  77  
  78                      $action = optional_param('action', '', PARAM_ALPHAEXT);
  79                      $postaction = optional_param('postaction', '', PARAM_ALPHAEXT);
  80                      // If the js exists, load it
  81                      if ($action) {
  82                          $script = $CFG->admin . '/tool/xmldb/actions/' . $action . '/' . $action . '.js';
  83                          $file = $CFG->dirroot . '/' . $script;
  84                          if (file_exists($file) && is_readable($file)) {
  85                              $PAGE->requires->js('/'.$script);
  86                          } else if ($postaction) {
  87                              // Try to load the postaction javascript if exists
  88                              $script = $CFG->admin . '/tool/xmldb/actions/' . $postaction . '/' . $postaction . '.js';
  89                              $file = $CFG->dirroot . '/' . $script;
  90                              if (file_exists($file) && is_readable($file)) {
  91                                  $PAGE->requires->js('/'.$script);
  92                              }
  93                          }
  94                      }
  95  
  96                      // Go with standard admin header
  97                      echo $OUTPUT->header();
  98                      echo $OUTPUT->heading($xmldb_action->getTitle());
  99                      echo $xmldb_action->getOutput();
 100                      echo $OUTPUT->footer();
 101                      break;
 102                  case ACTION_GENERATE_XML:
 103                      header('Content-type: application/xhtml+xml; charset=utf-8');
 104                      echo $xmldb_action->getOutput();
 105                      break;
 106              }
 107          } else {
 108              // TODO: need more detailed error info
 109              print_error('xmldberror');
 110          }
 111      } else {
 112          $a = new stdClass();
 113          $a->action = $action;
 114          $a->actionclass = $actionclass;
 115          print_error('cannotinstantiateclass', 'tool_xmldb', '', $a);
 116      }
 117  } else {
 118      print_error('invalidaction');
 119  }
 120  
 121  if ($xmldb_action->getDoesGenerate() != ACTION_GENERATE_XML) {
 122      if (debugging()) {
 123          // print_object($XMLDB);
 124      }
 125  }