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   1  <?php // $Id: unenrol.php,v 1.32.2.3 2008/05/16 02:07:58 dongsheng Exp $
   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  ?>