moodle/enrol/index.php
Petr Škoda d79d5ac276 MDL-31501 rework user session architecture
List of changes:
 * New OOP API using PHP namespace \core\session\.
 * All handlers now update the sessions table consistently.
 * Experimental DB session support in Oracle.
 * Full support for session file handler (filesystem locking required).
 * New option for alternative session directory.
 * Official memcached session handler support.
 * Workaround for memcached version with non-functional gc.
 * Improved security - forced session id regeneration.
 * Improved compatibility with recent PHP releases.
 * Fixed borked CSS during install in debug mode.
 * Switched to file based sessions in new installs.
 * DB session setting disappears if DB does not support sessions.
 * DB session setting disappears if session handler specified in config.php.
 * Fast purging of sessions used in request only.
 * No legacy distinction -  file, database and memcached support the same functionality.
 * Session handler name included in performance info.
 * Fixed user_loggedin and user_loggedout event triggering.
 * Other minor bugfixing and improvements.
 * Fixed database session segfault if MUC disposed before $DB.

Limitations:
 * Session access time is now updated right after session start.
 * Support for $CFG->sessionlockloggedinonly was removed.
 * First request does not update userid in sessions table.
 * The timeouts may break badly if server hosting forces PHP.ini session settings.
 * The session GC is a lot slower, we do not rely on external session timeouts.
 * There cannot be any hooks triggered at the session write time.
 * File and memcached handlers do not support session lock acquire timeouts.
 * Some low level PHP session functions can not be used directly in Moodle code.
2013-09-21 13:11:56 +02:00

103 lines
3.2 KiB
PHP

<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* This page shows all course enrolment options for current user.
*
* @package core_enrol
* @copyright 2010 Petr Skoda {@link http://skodak.org}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require('../config.php');
require_once("$CFG->libdir/formslib.php");
$id = required_param('id', PARAM_INT);
if (!isloggedin()) {
// do not use require_login here because we are usually coming from it,
// it would also mess up the SESSION->wantsurl
redirect(get_login_url());
}
$course = $DB->get_record('course', array('id'=>$id), '*', MUST_EXIST);
$context = context_course::instance($course->id, MUST_EXIST);
// Everybody is enrolled on the frontpage
if ($course->id == SITEID) {
redirect("$CFG->wwwroot/");
}
$PAGE->set_course($course);
$PAGE->set_pagelayout('course');
$PAGE->set_url('/enrol/index.php', array('id'=>$course->id));
// do not allow enrols when in login-as session
if (\core\session\manager::is_loggedinas() and $USER->loginascontext->contextlevel == CONTEXT_COURSE) {
print_error('loginasnoenrol', '', $CFG->wwwroot.'/course/view.php?id='.$USER->loginascontext->instanceid);
}
// get all enrol forms available in this course
$enrols = enrol_get_plugins(true);
$enrolinstances = enrol_get_instances($course->id, true);
$forms = array();
foreach($enrolinstances as $instance) {
if (!isset($enrols[$instance->enrol])) {
continue;
}
$form = $enrols[$instance->enrol]->enrol_page_hook($instance);
if ($form) {
$forms[$instance->id] = $form;
}
}
// Check if user already enrolled
if (is_enrolled($context, $USER, '', true)) {
if (!empty($SESSION->wantsurl)) {
$destination = $SESSION->wantsurl;
unset($SESSION->wantsurl);
} else {
$destination = "$CFG->wwwroot/course/view.php?id=$course->id";
}
redirect($destination); // Bye!
}
$PAGE->set_title($course->shortname);
$PAGE->set_heading($course->fullname);
$PAGE->navbar->add(get_string('enrolmentoptions','enrol'));
echo $OUTPUT->header();
echo $OUTPUT->heading(get_string('enrolmentoptions','enrol'));
$courserenderer = $PAGE->get_renderer('core', 'course');
echo $courserenderer->course_info_box($course);
//TODO: find if future enrolments present and display some info
foreach ($forms as $form) {
echo $form;
}
if (!$forms) {
if (isguestuser()) {
notice(get_string('noguestaccess', 'enrol'), get_login_url());
} else {
notice(get_string('notenrollable', 'enrol'), "$CFG->wwwroot/index.php");
}
}
echo $OUTPUT->footer();