course/enrol.php

   1 <?php // $Id$
   2       // Depending on the current enrolment method, this page
   3       // presents the user with whatever they need to know when
   4       // they try to enrol in a course.
   5
   6     require_once("../config.php");
   7     require_once("lib.php");
   8     require_once("$CFG->dirroot/enrol/enrol.class.php");
   9
  10     $id           = required_param('id', PARAM_INT);
  11     $loginasguest = optional_param('loginasguest', 0, PARAM_BOOL);
  12
  13     require_login();
  14
  15     if (! $course = get_record("course", "id", $id) ) {
  16         error("That's an invalid course id");
  17     }
  18
  19     if (! $site = get_site()) {
  20         error("Could not find a site!");
  21     }
  22
  23     check_for_restricted_user($USER->username);
  24
  25 /// Refreshing enrolment data in the USER session
  26     if (!($plugins = explode(',', $CFG->enrol_plugins_enabled))) {
  27         $plugins = array($CFG->enrol);
  28     }
  29     require_once($CFG->dirroot .'/enrol/enrol.class.php');
  30     foreach ($plugins as $p) {
  31         $enrol = enrolment_factory::factory($p);
  32         if (method_exists($enrol, 'get_student_courses')) {
  33             $enrol->get_student_courses($USER);
  34         }
  35         if (method_exists($enrol, 'get_teacher_courses')) {
  36             $enrol->get_teacher_courses($USER);
  37         }
  38         unset($enrol);
  39     }
  40
  41     $enrol = enrolment_factory::factory($course->enrol);
  42
  43 /// Double check just in case they are actually enrolled already
  44 /// This might occur if they were enrolled during this session
  45 /// also happens when course is unhidden after student logs in
  46
  47     if ( !empty($USER->student[$course->id]) or !empty($USER->teacher[$course->id]) ) {
  48
  49         if ($SESSION->wantsurl) {
  50             $destination = $SESSION->wantsurl;
  51             unset($SESSION->wantsurl);
  52         } else {
  53             $destination = "$CFG->wwwroot/course/view.php?id=$course->id";
  54         }
  55
  56         redirect($destination);
  57     }
  58
  59 /// Check if the course is a meta course
  60 /// moved here to fix bug 5734
  61     if ($course->metacourse) {
  62         print_header_simple();
  63         notice(get_string('coursenotaccessible'), "$CFG->wwwroot/index.php");
  64     }
  65
  66 /// Users can't enroll to site course
  67     if (!$course->category) {
  68         print_header_simple();
  69         notice(get_string('enrollfirst'), "$CFG->wwwroot/index.php");
  70     }
  71
  72 /// Double check just in case they are enrolled to start in the future
  73
  74     if ($student = get_record('user_students', 'userid', $USER->id, 'course', $course->id)) {
  75         if ($course->enrolperiod and $student->timestart and ($student->timestart >= time())) {
  76             $message = get_string('enrolmentnotyet', '', userdate($student->timestart));
  77             print_header();
  78             notice($message, "$CFG->wwwroot/index.php");
  79         }
  80     }
  81
  82 /// Check if the course is enrollable
  83     if (!method_exists($enrol, 'print_entry')) {
  84         print_header_simple();
  85         notice(get_string('enrolmentnointernal'), "$CFG->wwwroot/index.php");
  86     }
  87
  88     if (!$course->enrollable ||
  89             ($course->enrollable == 2 && $course->enrolstartdate > 0 && $course->enrolstartdate > time()) ||
  90             ($course->enrollable == 2 && $course->enrolenddate > 0 && $course->enrolenddate <= time())
  91             ) {
  92         print_header($course->shortname, $course->fullname, $course->shortname );
  93         notice(get_string('notenrollable'), "$CFG->wwwroot/index.php");
  94     }
  95
  96 /// Check the submitted enrollment key if there is one
  97
  98     if ($form = data_submitted()) {
  99       //User is not enrolled in the course, wants to access course content
 100       //as a guest, and course setting allow unlimited guest access
 101       //
 102       //the original idea was to use "loginas" feature, but require_login() would have to be changed
 103       //and we would have to explain it to all users - it is now plain login action
 104       if ($loginasguest and !empty($CFG->guestloginbutton) and ($course->guest==1 or $course->guest==2)) {
 105         if (isset($SESSION->currentgroup)) {
 106             unset($SESSION->currentgroup);
 107         }
 108         $USER = get_complete_user_data('username', 'guest');    // get full guest user data
 109         add_to_log(SITEID, 'user', 'login', "view.php?id=$USER->id&course=".SITEID, $USER->id, 0, $USER->id);
 110         if ($SESSION->wantsurl) {
 111             $destination = $SESSION->wantsurl;
 112             unset($SESSION->wantsurl);
 113         } else {
 114             $destination = "$CFG->wwwroot/course/view.php?id=$course->id";
 115         }
 116         redirect($destination);
 117       }
 118       $enrol->check_entry($form, $course);
 119     }
 120
 121     $enrol->print_entry($course);
 122
 123 /// Easy!
 124
 125 ?>