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<?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/>.
/**
* Switch roles form.
*
* @package core_course
* @copyright 2016 Damyon Wiese
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
require_once($CFG->libdir.'/formslib.php');
/**
* Defines the course completion settings form.
*/
class switchrole_form extends moodleform {
/**
* Determine whether the user is assuming another role
*
* This function checks to see if the user is assuming another role by means of
* role switching. In doing this we compare each RSW key (context path) against
* the current context path. This ensures that we can provide the switching
* options against both the course and any page shown under the course.
*
* @param context $context
* @return bool|int The role(int) if the user is in another role, false otherwise
*/
protected function in_alternative_role($context) {
global $USER, $PAGE;
if (!empty($USER->access['rsw']) && is_array($USER->access['rsw'])) {
if (!empty($PAGE->context) && !empty($USER->access['rsw'][$PAGE->context->path])) {
return $USER->access['rsw'][$PAGE->context->path];
}
foreach ($USER->access['rsw'] as $key=>$role) {
if (strpos($context->path, $key)===0) {
return $role;
}
}
}
return false;
}
/**
* Defines the form fields.
*/
public function definition() {
global $USER, $CFG, $DB;
$mform = $this->_form;
$course = $this->_customdata['course'];
// Overall criteria aggregation.
$context = context_course::instance($course->id);
$roles = array();
$assumedrole = -1;
if (is_role_switched($course->id)) {
$roles[0] = get_string('switchrolereturn');
$assumedrole = $USER->access['rsw'][$context->path];
}
$availableroles = get_switchable_roles($context);
if (is_array($availableroles)) {
foreach ($availableroles as $key=>$role) {
if ($assumedrole == (int)$key) {
continue;
}
$roles[$key] = $role;
}
}
$mform->addElement('select', 'switchrole', get_string('role'), $roles);
// Add common action buttons.
$this->add_action_buttons();
// Add hidden fields.
$mform->addElement('hidden', 'id', $course->id);
$mform->setType('id', PARAM_INT);
}
}