Proyectos de Subversion Moodle

<?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/>.

/**

 * The purpose of this file is to allow the user to switch roles and be redirected

 * back to the page that they were on.

 *

 * This functionality is also supported in {@link /course/view.php} in order to comply

 * with backwards compatibility.

 * The reason that we created this file was so that user didn't get redirected back

 * to the course view page only to be redirected again.

 *

 * @since Moodle 2.0

 * @package course

 * @copyright 2009 Sam Hemelryk

 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

require_once('../config.php');

require_once($CFG->dirroot.'/course/lib.php');

$id         = required_param('id', PARAM_INT);

$switchrole = optional_param('switchrole', -1, PARAM_INT);

$returnurl  = optional_param('returnurl', '', PARAM_LOCALURL);

$PAGE->set_url('/course/switchrole.php', array('id'=>$id, 'switchrole'=>$switchrole));

if ($switchrole >= 0) {

    require_sesskey();

}

if (!$course = $DB->get_record('course', array('id'=>$id))) {

    redirect(new moodle_url('/'));

}

$context = context_course::instance($course->id);

// Remove any switched roles before checking login.

if ($switchrole == 0) {

    role_switch(0, $context);

}

require_login($course);

// Switchrole - sanity check in cost-order...

if ($switchrole > 0 && has_capability('moodle/role:switchroles', $context)) {

    // Is this role assignable in this context?

    // inquiring minds want to know...

    $aroles = get_switchable_roles($context);

    if (is_array($aroles) && isset($aroles[$switchrole])) {

        role_switch($switchrole, $context);

    }

} else if ($switchrole < 0) {

    $PAGE->set_title(get_string('switchroleto'));

    $PAGE->set_heading($course->fullname);

    $PAGE->set_pagelayout('incourse');

    echo $OUTPUT->header();

    echo $OUTPUT->heading(get_string('switchroleto'));

    // Overall criteria aggregation.

    $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, ROLENAME_BOTH);

    if (is_array($availableroles)) {

        foreach ($availableroles as $key => $role) {

            if ($assumedrole == (int)$key) {

                continue;

            }

            $roles[$key] = $role;

        }

    }

    echo $OUTPUT->box(markdown_to_html(get_string('switchroleto_help')));

    foreach ($roles as $key => $role) {

        $url = new moodle_url('/course/switchrole.php', array('id' => $id, 'switchrole' => $key, 'returnurl' => $returnurl));

        // Button encodes special characters, apply htmlspecialchars_decode() to avoid double escaping.

        echo $OUTPUT->container($OUTPUT->single_button($url, htmlspecialchars_decode($role, ENT_COMPAT)), 'mx-3 mb-1');

    }

    $url = new moodle_url($returnurl);

    echo $OUTPUT->container($OUTPUT->action_link($url, get_string('cancel')), 'mx-3 mb-1');

    echo $OUTPUT->footer();

    exit;

}

redirect(new moodle_url($returnurl));