course/unenrol.php

   1 <?php // $Id$
   2
   3 //  Remove oneself or someone else from a course, unassigning all
   4 //  roles one might have
   5 //
   6 //  This will not delete any of their data from the course,
   7 //  but will remove them from the participant list and prevent
   8 //  any course email being sent to them.
   9
  10     require_once("../config.php");
  11     require_once("lib.php");
  12
  13     $id      = required_param('id', PARAM_INT);               //course
  14     $userid  = optional_param('user', 0, PARAM_INT);          //course
  15     $confirm = optional_param('confirm', 0, PARAM_BOOL);
  16
  17     if($userid == $USER->id){
  18         // the rest of this code assumes $userid=0 means
  19         // you are unassigning yourself, so set this for the
  20         // correct capabiliy checks & language later
  21         $userid = 0;
  22     }
  23
  24     if (! $course = get_record('course', 'id', $id) ) {
  25         error('Invalid course id');
  26     }
  27
  28     if (! $context = get_context_instance(CONTEXT_COURSE, $course->id)) {
  29         error('Invalid context');
  30     }
  31
  32     require_login($course->id);
  33
  34     if ($course->metacourse) {
  35         print_error('cantunenrollfrommetacourse', '', $CFG->wwwroot.'/course/view.php?id='.$course->id);
  36     }
  37
  38     if ($userid) {   // Unenrolling someone else
  39         require_capability('moodle/role:assign', $context, NULL, false);
  40
  41         $roles = get_user_roles($context, $userid, false);
  42
  43         // verify user may unassign all roles at course context
  44         foreach($roles as $role) {
  45             if (!user_can_assign($context, $role->roleid)) {
  46                 error('Can not unassign this user from role id:'.$role->roleid);
  47             }
  48         }
  49
  50     } else {         // Unenrol yourself
  51         require_capability('moodle/role:unassignself', $context, NULL, false);
  52     }
  53
  54     if (!empty($USER->access['rsw'][$context->path])) {
  55         print_error('cantunenrollinthisrole', '',
  56                     $CFG->wwwroot.'/course/view.php?id='.$course->id);
  57     }
  58
  59     if ($confirm and confirm_sesskey()) {
  60         if ($userid) {
  61             if (! role_unassign(0, $userid, 0, $context->id)) {
  62                 error("An error occurred while trying to unenrol that person.");
  63             }
  64
  65             add_to_log($course->id, 'course', 'unenrol',
  66                     "view.php?id=$course->id", $course->id);
  67             redirect($CFG->wwwroot.'/user/index.php?id='.$course->id);
  68
  69         } else {
  70             if (! role_unassign(0, $USER->id, 0, $context->id)) {
  71                 error("An error occurred while trying to unenrol you.");
  72             }
  73
  74             // force a refresh of mycourses
  75             unset($USER->mycourses);
  76             add_to_log($course->id, 'course', 'unenrol',
  77                     "view.php?id=$course->id", $course->id);
  78
  79             redirect($CFG->wwwroot);
  80         }
  81     }
  82
  83
  84     $strunenrol = get_string('unenrol');
  85     $navlinks = array();
  86     $navlinks[] = array('name' => $strunenrol, 'link' => null, 'type' => 'misc');
  87     $navigation = build_navigation($navlinks);
  88
  89     print_header("$course->shortname: $strunenrol", $course->fullname, $navigation);
  90
  91     if ($userid) {
  92         if (!$user = get_record('user', 'id', $userid)) {
  93             error('That user does not exist!');
  94         }
  95         $strunenrolsure  = get_string('unenrolsure', '', fullname($user, true));
  96         notice_yesno($strunenrolsure, "unenrol.php?id=$id&amp;user=$user->id&amp;confirm=yes&amp;sesskey=".sesskey(),
  97                                       $_SERVER['HTTP_REFERER']);
  98     } else {
  99         $strunenrolsure  = get_string('unenrolsure', '', get_string("yourself"));
 100         notice_yesno($strunenrolsure, "unenrol.php?id=$id&amp;confirm=yes&amp;sesskey=".sesskey(),
 101                                       $_SERVER['HTTP_REFERER']);
 102     }
 103
 104     print_footer($course);
 105
 106 ?>