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   1  <?php  //$Id: edit_form.php,v 1.10.2.2 2008/03/03 10:21:42 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://moodle.com       //
  11  //                                                                       //
  12  // This program is free software; you can redistribute it and/or modify  //
  13  // it under the terms of the GNU General Public License as published by  //
  14  // the Free Software Foundation; either version 2 of the License, or     //
  15  // (at your option) any later version.                                   //
  16  //                                                                       //
  17  // This program is distributed in the hope that it will be useful,       //
  18  // but WITHOUT ANY WARRANTY; without even the implied warranty of        //
  19  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         //
  20  // GNU General Public License for more details:                          //
  21  //                                                                       //
  22  //          http://www.gnu.org/copyleft/gpl.html                         //
  23  //                                                                       //
  24  ///////////////////////////////////////////////////////////////////////////
  25  
  26  require_once $CFG->libdir.'/formslib.php';
  27  
  28  class edit_scale_form extends moodleform {
  29      function definition() {
  30          global $CFG;
  31          $mform =& $this->_form;
  32  
  33          // visible elements
  34          $mform->addElement('header', 'general', get_string('scale'));
  35  
  36          $mform->addElement('text', 'name', get_string('name'), 'size="40"');
  37          $mform->addRule('name', get_string('required'), 'required', null, 'client');
  38          $mform->setType('name', PARAM_TEXT);
  39  
  40          $mform->addElement('advcheckbox', 'standard', get_string('scalestandard'));
  41          $mform->setHelpButton('standard', array('scalestandard', get_string('scalestandard'), 'grade'));
  42  
  43          $mform->addElement('static', 'used', get_string('used'));
  44  
  45          $mform->addElement('textarea', 'scale', get_string('scale'), array('cols'=>50, 'rows'=>2));
  46          $mform->setHelpButton('scale', array('scales', get_string('scale')));
  47          $mform->addRule('scale', get_string('required'), 'required', null, 'client');
  48          $mform->setType('scale', PARAM_TEXT);
  49  
  50          $mform->addElement('htmleditor', 'description', get_string('description'), array('cols'=>80, 'rows'=>20));
  51  
  52  
  53          // hidden params
  54          $mform->addElement('hidden', 'id', 0);
  55          $mform->setType('id', PARAM_INT);
  56  
  57          $mform->addElement('hidden', 'courseid', 0);
  58          $mform->setType('courseid', PARAM_INT);
  59  
  60  /// add return tracking info
  61          $gpr = $this->_customdata['gpr'];
  62          $gpr->add_mform_elements($mform);
  63  
  64  //-------------------------------------------------------------------------------
  65          // buttons
  66          $this->add_action_buttons();
  67      }
  68  
  69  
  70  /// tweak the form - depending on existing data
  71      function definition_after_data() {
  72          global $CFG;
  73  
  74          $mform =& $this->_form;
  75  
  76          $courseid = $mform->getElementValue('courseid');
  77  
  78          if ($id = $mform->getElementValue('id')) {
  79              $scale = grade_scale::fetch(array('id'=>$id));
  80              $used = $scale->is_used();
  81  
  82              if ($used) {
  83                  $mform->hardFreeze('scale');
  84              }
  85  
  86              if (empty($courseid)) {
  87                  $mform->hardFreeze('standard');
  88  
  89              } else if (empty($scale->courseid) and !has_capability('moodle/course:managescales', get_context_instance(CONTEXT_SYSTEM))) {
  90                  $mform->hardFreeze('standard');
  91  
  92              } else if ($used and !empty($scale->courseid)) {
  93                  $mform->hardFreeze('standard');
  94              }
  95  
  96              $usedstr = $scale->is_used() ? get_string('yes') : get_string('no');
  97              $used_el =& $mform->getElement('used');
  98              $used_el->setValue($usedstr);
  99  
 100          } else {
 101              $mform->removeElement('used');
 102              if (empty($courseid) or !has_capability('moodle/course:managescales', get_context_instance(CONTEXT_SYSTEM))) {
 103                  $mform->hardFreeze('standard');
 104              }
 105          }
 106      }
 107  
 108  /// perform extra validation before submission
 109      function validation($data, $files) {
 110          global $CFG, $COURSE;
 111  
 112          $errors = parent::validation($data, $files);
 113  
 114          // we can not allow 2 scales with the same exact scale as this creates
 115          // problems for backup/restore
 116  
 117          $old = grade_scale::fetch(array('id'=>$data['id']));
 118  
 119          if (array_key_exists('standard', $data)) {
 120              if (empty($data['standard'])) {
 121                  $courseid = $COURSE->id;
 122              } else {
 123                  $courseid = 0;
 124              }
 125  
 126          } else {
 127              $courseid = $old->courseid;
 128          }
 129  
 130          if (array_key_exists('scale', $data)) {
 131              $count = count_records('scale', 'courseid', $courseid, 'scale', $data['scale']);
 132  
 133              if (empty($old->id) or $old->courseid != $courseid) {
 134                  if ($count) {
 135                      $errors['scale'] = get_string('duplicatescale', 'grades');
 136                  }
 137  
 138              } else if ($old->scale != $data['scale']) {
 139                  if ($count) {
 140                      $errors['scale'] = get_string('duplicatescale', 'grades');
 141                  }
 142              }
 143  
 144              $options = explode(',', $data['scale']);
 145              if (count($options) < 2) {
 146                  $errors['scale'] = get_string('error');
 147              }
 148          }
 149  
 150          return $errors;
 151      }
 152  }
 153  
 154  ?>