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Differences Between: [Versions 310 and 401] [Versions 311 and 401] [Versions 39 and 401] [Versions 400 and 401]

   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   * The purpose of this file is to allow the user to switch roles and be redirected
  19   * back to the page that they were on.
  20   *
  21   * This functionality is also supported in {@link /course/view.php} in order to comply
  22   * with backwards compatibility.
  23   * The reason that we created this file was so that user didn't get redirected back
  24   * to the course view page only to be redirected again.
  25   *
  26   * @since Moodle 2.0
  27   * @package course
  28   * @copyright 2009 Sam Hemelryk
  29   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  30   */
  31  
  32  require_once('../config.php');
  33  require_once($CFG->dirroot.'/course/lib.php');
  34  
  35  $id         = required_param('id', PARAM_INT);
  36  $switchrole = optional_param('switchrole', -1, PARAM_INT);
  37  $returnurl  = optional_param('returnurl', '', PARAM_LOCALURL);
  38  
  39  if (strpos($returnurl, '?') === false) {
  40      // Looks like somebody did not set proper page url, better go to course page.
  41      $returnurl = new moodle_url('/course/view.php', array('id' => $id));
  42  } else {
  43      if (strpos($returnurl, $CFG->wwwroot) !== 0) {
  44          $returnurl = $CFG->wwwroot.$returnurl;
  45      }
  46      $returnurl  = clean_param($returnurl, PARAM_LOCALURL);
  47  }
  48  
  49  $PAGE->set_url('/course/switchrole.php', array('id'=>$id, 'switchrole'=>$switchrole));
  50  
  51  if ($switchrole >= 0) {
  52      require_sesskey();
  53  }
  54  
  55  if (!$course = $DB->get_record('course', array('id'=>$id))) {
  56      redirect(new moodle_url('/'));
  57  }
  58  
  59  $context = context_course::instance($course->id);
  60  
  61  // Remove any switched roles before checking login.
  62  if ($switchrole == 0) {
  63      role_switch(0, $context);
  64  }
  65  require_login($course);
  66  
  67  // Switchrole - sanity check in cost-order...
  68  if ($switchrole > 0 && has_capability('moodle/role:switchroles', $context)) {
  69      // Is this role assignable in this context?
  70      // inquiring minds want to know...
  71      $aroles = get_switchable_roles($context);
  72      if (is_array($aroles) && isset($aroles[$switchrole])) {
  73          role_switch($switchrole, $context);
  74      }
  75  } else if ($switchrole < 0) {
  76  
  77      $PAGE->set_title(get_string('switchroleto'));
  78      $PAGE->set_heading($course->fullname);
  79      $PAGE->set_pagelayout('incourse');
  80  
  81      echo $OUTPUT->header();
  82      echo $OUTPUT->heading(get_string('switchroleto'));
  83  
  84      // Overall criteria aggregation.
  85      $roles = array();
  86      $assumedrole = -1;
  87      if (is_role_switched($course->id)) {
  88          $roles[0] = get_string('switchrolereturn');
  89          $assumedrole = $USER->access['rsw'][$context->path];
  90      }
  91      $availableroles = get_switchable_roles($context, ROLENAME_BOTH);
  92      if (is_array($availableroles)) {
  93          foreach ($availableroles as $key => $role) {
  94              if ($assumedrole == (int)$key) {
  95                  continue;
  96              }
  97              $roles[$key] = $role;
  98          }
  99      }
 100      echo $OUTPUT->box(markdown_to_html(get_string('switchroleto_help')));
 101  
 102      foreach ($roles as $key => $role) {
 103          $url = new moodle_url('/course/switchrole.php', array('id' => $id, 'switchrole' => $key, 'returnurl' => $returnurl));
 104          // Button encodes special characters, apply htmlspecialchars_decode() to avoid double escaping.
 105          echo $OUTPUT->container($OUTPUT->single_button($url, htmlspecialchars_decode($role, ENT_COMPAT)), 'mx-3 mb-1');
 106      }
 107  
 108      $url = new moodle_url($returnurl);
 109      echo $OUTPUT->container($OUTPUT->action_link($url, get_string('cancel')), 'mx-3 mb-1');
 110  
 111      echo $OUTPUT->footer();
 112      exit;
 113  }
 114  
 115  redirect($returnurl);