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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   * Defines the import questions form.
  19   *
  20   * @package    moodlecore
  21   * @subpackage questionbank
  22   * @copyright  2007 Jamie Pratt [email protected]
  23   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24   */
  25  
  26  
  27  defined('MOODLE_INTERNAL') || die();
  28  
  29  require_once($CFG->libdir . '/formslib.php');
  30  
  31  
  32  /**
  33   * Form to import questions into the question bank.
  34   *
  35   * @copyright  2007 Jamie Pratt [email protected]
  36   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  37   */
  38  class question_import_form extends moodleform {
  39  
  40      protected function definition() {
  41          global $COURSE;
  42          $mform = $this->_form;
  43  
  44          $defaultcategory = $this->_customdata['defaultcategory'];
  45          $contexts = $this->_customdata['contexts'];
  46  
  47          // Choice of import format, with help icons.
  48          $mform->addElement('header', 'fileformat', get_string('fileformat', 'question'));
  49  
  50          $fileformatnames = get_import_export_formats('import');
  51          $radioarray = array();
  52          $i = 0 ;
  53          foreach ($fileformatnames as $shortname => $fileformatname) {
  54              $currentgrp1 = array();
  55              $currentgrp1[] = $mform->createElement('radio', 'format', '', $fileformatname, $shortname);
  56              $mform->addGroup($currentgrp1, "formathelp[{$i}]", '', array('<br />'), false);
  57  
  58              if (get_string_manager()->string_exists('pluginname_help', 'qformat_' . $shortname)) {
  59                  $mform->addHelpButton("formathelp[{$i}]", 'pluginname', 'qformat_' . $shortname);
  60              }
  61  
  62              $i++ ;
  63          }
  64          $mform->addRule("formathelp[0]", null, 'required', null, 'client');
  65  
  66          // Import options.
  67          $mform->addElement('header','general', get_string('general', 'form'));
  68  
  69          $mform->addElement('questioncategory', 'category', get_string('importcategory', 'question'), compact('contexts'));
  70          $mform->setDefault('category', $defaultcategory);
  71          $mform->addHelpButton('category', 'importcategory', 'question');
  72  
  73          $categorygroup = array();
  74          $categorygroup[] = $mform->createElement('checkbox', 'catfromfile', '', get_string('getcategoryfromfile', 'question'));
  75          $categorygroup[] = $mform->createElement('checkbox', 'contextfromfile', '', get_string('getcontextfromfile', 'question'));
  76          $mform->addGroup($categorygroup, 'categorygroup', '', '', false);
  77          $mform->disabledIf('categorygroup', 'catfromfile', 'notchecked');
  78          $mform->setDefault('catfromfile', 1);
  79          $mform->setDefault('contextfromfile', 1);
  80  
  81          $matchgrades = array();
  82          $matchgrades['error'] = get_string('matchgradeserror', 'question');
  83          $matchgrades['nearest'] = get_string('matchgradesnearest', 'question');
  84          $mform->addElement('select', 'matchgrades', get_string('matchgrades', 'question'), $matchgrades);
  85          $mform->addHelpButton('matchgrades', 'matchgrades', 'question');
  86          $mform->setDefault('matchgrades', 'error');
  87  
  88          $mform->addElement('selectyesno', 'stoponerror', get_string('stoponerror', 'question'));
  89          $mform->setDefault('stoponerror', 1);
  90          $mform->addHelpButton('stoponerror', 'stoponerror', 'question');
  91  
  92          // The file to import
  93          $mform->addElement('header', 'importfileupload', get_string('importquestions', 'question'));
  94  
  95          $mform->addElement('filepicker', 'newfile', get_string('import'));
  96          $mform->addRule('newfile', null, 'required', null, 'client');
  97  
  98          // Submit button.
  99          $mform->addElement('submit', 'submitbutton', get_string('import'));
 100  
 101          // Set a template for the format select elements
 102          $renderer = $mform->defaultRenderer();
 103          $template = "{help} {element}\n";
 104          $renderer->setGroupElementTemplate($template, 'format');
 105      }
 106  
 107      /**
 108       * Checks that a file has been uploaded, and that it is of a plausible type.
 109       * @param array $data the submitted data.
 110       * @param array $errors the errors so far.
 111       * @return array the updated errors.
 112       */
 113      protected function validate_uploaded_file($data, $errors) {
 114          if (empty($data['newfile'])) {
 115              $errors['newfile'] = get_string('required');
 116              return $errors;
 117          }
 118  
 119          $files = $this->get_draft_files('newfile');
 120          if (count($files) < 1) {
 121              $errors['newfile'] = get_string('required');
 122              return $errors;
 123          }
 124  
 125          if (empty($data['format'])) {
 126              $errors['format'] = get_string('required');
 127              return $errors;
 128          }
 129  
 130          $formatfile = 'format/' . $data['format'] . '/format.php';
 131          if (!is_readable($formatfile)) {
 132              throw new moodle_exception('formatnotfound', 'question', '', $data['format']);
 133          }
 134  
 135          require_once($formatfile);
 136  
 137          $classname = 'qformat_' . $data['format'];
 138          $qformat = new $classname();
 139  
 140          $file = reset($files);
 141          if (!$qformat->can_import_file($file)) {
 142              $a = new stdClass();
 143              $a->actualtype = $file->get_mimetype();
 144              $a->expectedtype = $qformat->mime_type();
 145              $errors['newfile'] = get_string('importwrongfiletype', 'question', $a);
 146          }
 147  
 148          return $errors;
 149      }
 150  
 151      public function validation($data, $files) {
 152          $errors = parent::validation($data, $files);
 153          $errors = $this->validate_uploaded_file($data, $errors);
 154          return $errors;
 155      }
 156  }