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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   * Self enrol plugin implementation.
  19   *
  20   * @package    enrol_self
  21   * @copyright  2010 Petr Skoda  {@link http://skodak.org}
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  defined('MOODLE_INTERNAL') || die();
  26  
  27  require_once("$CFG->libdir/formslib.php");
  28  
  29  class enrol_self_enrol_form extends moodleform {
  30      protected $instance;
  31      protected $toomany = false;
  32  
  33      /**
  34       * Overriding this function to get unique form id for multiple self enrolments.
  35       *
  36       * @return string form identifier
  37       */
  38      protected function get_form_identifier() {
  39          $formid = $this->_customdata->id.'_'.get_class($this);
  40          return $formid;
  41      }
  42  
  43      public function definition() {
  44          $mform = $this->_form;
  45          $instance = $this->_customdata;
  46          $this->instance = $instance;
  47          $plugin = enrol_get_plugin('self');
  48  
  49          $heading = $plugin->get_instance_name($instance);
  50          $mform->addElement('header', 'selfheader', $heading);
  51  
  52          if ($instance->password) {
  53              // Change the id of self enrolment key input as there can be multiple self enrolment methods.
  54              $mform->addElement('passwordunmask', 'enrolpassword', get_string('password', 'enrol_self'),
  55                      array('id' => 'enrolpassword_'.$instance->id));
  56          } else {
  57              $mform->addElement('static', 'nokey', '', get_string('nopassword', 'enrol_self'));
  58          }
  59  
  60          $this->add_action_buttons(false, get_string('enrolme', 'enrol_self'));
  61  
  62          $mform->addElement('hidden', 'id');
  63          $mform->setType('id', PARAM_INT);
  64          $mform->setDefault('id', $instance->courseid);
  65  
  66          $mform->addElement('hidden', 'instance');
  67          $mform->setType('instance', PARAM_INT);
  68          $mform->setDefault('instance', $instance->id);
  69      }
  70  
  71      public function validation($data, $files) {
  72          global $DB, $CFG;
  73  
  74          $errors = parent::validation($data, $files);
  75          $instance = $this->instance;
  76  
  77          if ($this->toomany) {
  78              $errors['notice'] = get_string('error');
  79              return $errors;
  80          }
  81  
  82          if ($instance->password) {
  83              if ($data['enrolpassword'] !== $instance->password) {
  84                  if ($instance->customint1) {
  85                      $groups = $DB->get_records('groups', array('courseid'=>$instance->courseid), 'id ASC', 'id, enrolmentkey');
  86                      $found = false;
  87                      foreach ($groups as $group) {
  88                          if (empty($group->enrolmentkey)) {
  89                              continue;
  90                          }
  91                          if ($group->enrolmentkey === $data['enrolpassword']) {
  92                              $found = true;
  93                              break;
  94                          }
  95                      }
  96                      if (!$found) {
  97                          // We can not hint because there are probably multiple passwords.
  98                          $errors['enrolpassword'] = get_string('passwordinvalid', 'enrol_self');
  99                      }
 100  
 101                  } else {
 102                      $plugin = enrol_get_plugin('self');
 103                      if ($plugin->get_config('showhint')) {
 104                          $hint = core_text::substr($instance->password, 0, 1);
 105                          $errors['enrolpassword'] = get_string('passwordinvalidhint', 'enrol_self', $hint);
 106                      } else {
 107                          $errors['enrolpassword'] = get_string('passwordinvalid', 'enrol_self');
 108                      }
 109                  }
 110              }
 111          }
 112  
 113          return $errors;
 114      }
 115  }