mirror of
https://github.com/moodle/moodle.git
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86 lines
2.8 KiB
PHP
86 lines
2.8 KiB
PHP
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* The purpose of this file is to allow the user to switch roles and be redirected
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* back to the page that they were on.
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*
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* This functionality is also supported in {@link /course/view.php} in order to comply
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* with backwards compatibility
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* The reason that we created this file was so that user didn't get redirected back
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* to the course view page only to be redirected again.
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*
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* @since 2.0
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* @package course
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* @copyright 2009 Sam Hemelryk
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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require_once('../config.php');
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require_once($CFG->dirroot.'/course/lib.php');
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$id = required_param('id', PARAM_INT);
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$switchrole = optional_param('switchrole',-1, PARAM_INT);
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$returnurlkey = optional_param('returnurl', false, PARAM_INT);
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$PAGE->set_url(new moodle_url($CFG->wwwroot.'/course/switchrole.php', array('id'=>$id)));
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if (!confirm_sesskey()) {
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print_error('confirmsesskeybad', 'error');
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}
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if (! ($course = $DB->get_record('course', array('id'=>$id)))) {
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print_error('invalidcourseid', 'error');
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}
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if (!$context = get_context_instance(CONTEXT_COURSE, $course->id)) {
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print_error('nocontext');
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}
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// Remove any switched roles before checking login
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if ($switchrole == 0) {
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role_switch($switchrole, $context);
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}
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require_login($course);
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// Switchrole - sanity check in cost-order...
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if ($switchrole > 0 && has_capability('moodle/role:switchroles', $context)) {
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// is this role assignable in this context?
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// inquiring minds want to know...
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$aroles = get_switchable_roles($context);
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if (is_array($aroles) && isset($aroles[$switchrole])) {
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role_switch($switchrole, $context);
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// Double check that this role is allowed here
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require_login($course);
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}
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}
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$returnurl = false;
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if ($returnurlkey && !empty($SESSION->returnurl) && strpos($SESSION->returnurl, 'moodle_url')!==false) {
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$returnurl = @unserialize($SESSION->returnurl);
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if (!($returnurl instanceof moodle_url)) {
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$returnurl = false;
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}
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unset($SESSION->returnurl);
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}
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if ($returnurl===false) {
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$returnurl = new moodle_url('/course/view.php', array('id'=>$course->id));
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}
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redirect($returnurl);
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