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/>.

/**

 * MNet hosts block.

 *

 * @package    block_mnet_hosts

 * @copyright  1999 onwards Martin Dougiamas (http://dougiamas.com)

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

 */

class block_mnet_hosts extends block_list {

    function init() {

        $this->title = get_string('pluginname','block_mnet_hosts') ;

    }

    function has_config() {

        return false;

    }

    function applicable_formats() {

        if (has_capability('moodle/site:mnetlogintoremote', context_system::instance(), NULL, false)) {

            return array('all' => true, 'mod' => false, 'tag' => false);

        } else {

            return array('site' => true);

        }

    }

    function get_content() {

        global $CFG, $USER, $DB, $OUTPUT;

        // shortcut -  only for logged in users!

        if (!isloggedin() || isguestuser()) {

            return false;

        }

        if (\core\session\manager::is_loggedinas()) {

            $this->content = new stdClass();

            $this->content->footer = html_writer::tag('span',

                get_string('notpermittedtojumpas', 'mnet'));

            return $this->content;

        }

        // according to start_jump_session,

        // remote users can't on-jump

        // so don't show this block to them

        if (is_mnet_remote_user($USER)) {

            if (debugging() and !empty($CFG->debugdisplay)) {

                $this->content = new stdClass();

                $this->content->footer = html_writer::tag('span',

                    get_string('error_localusersonly', 'block_mnet_hosts'),

                    array('class' => 'error'));

                return $this->content;

            } else {

                return '';

            }

        }

        if (!is_enabled_auth('mnet')) {

            if (debugging() and !empty($CFG->debugdisplay)) {

                $this->content = new stdClass();

                $this->content->footer = html_writer::tag('span',

                    get_string('error_authmnetneeded', 'block_mnet_hosts'),

                    array('class' => 'error'));

                return $this->content;

            } else {

                return '';

            }

        }

        if (!has_capability('moodle/site:mnetlogintoremote', context_system::instance(), NULL, false)) {

            if (debugging() and !empty($CFG->debugdisplay)) {

                $this->content = new stdClass();

                $this->content->footer = html_writer::tag('span',

                    get_string('error_roamcapabilityneeded', 'block_mnet_hosts'),

                    array('class' => 'error'));

                return $this->content;

            } else {

                return '';

            }

        }

        if ($this->content !== NULL) {

            return $this->content;

        }

        // TODO: Test this query - it's appropriate? It works?

        // get the hosts and whether we are doing SSO with them

        $sql = "

             SELECT DISTINCT

                 h.id,

                 h.name,

                 h.wwwroot,

                 a.name as application,

                 a.display_name

             FROM

                 {mnet_host} h,

                 {mnet_application} a,

                 {mnet_host2service} h2s_IDP,

                 {mnet_service} s_IDP,

                 {mnet_host2service} h2s_SP,

                 {mnet_service} s_SP

             WHERE

                 h.id <> ? AND

                 h.id <> ? AND

                 h.id = h2s_IDP.hostid AND

                 h.deleted = 0 AND

                 h.applicationid = a.id AND

                 h2s_IDP.serviceid = s_IDP.id AND

                 s_IDP.name = 'sso_idp' AND

                 h2s_IDP.publish = '1' AND

                 h.id = h2s_SP.hostid AND

                 h2s_SP.serviceid = s_SP.id AND

                 s_SP.name = 'sso_idp' AND

                 h2s_SP.publish = '1'

             ORDER BY

                 a.display_name,

                 h.name";

        $hosts = $DB->get_records_sql($sql, array($CFG->mnet_localhost_id, $CFG->mnet_all_hosts_id));

        $this->content = new stdClass();

        $this->content->items = array();

        $this->content->icons = array();

        $this->content->footer = '';

        if ($hosts) {

            foreach ($hosts as $host) {

                if ($host->id == $USER->mnethostid) {

                    $url = new \moodle_url($host->wwwroot);

                } else {

                    $url = new \moodle_url('/auth/mnet/jump.php', array('hostid' => $host->id));

                }

                $this->content->items[] = html_writer::tag('a',

                    $OUTPUT->pix_icon("i/{$host->application}_host", get_string('server', 'block_mnet_hosts')) . s($host->name),

                    array('href' => $url->out(), 'title' => s($host->name))

                );

            }

        }

        return $this->content;

    }

    /**

     * This block shouldn't be added to a page if the mnet authentication method is disabled.

     *

     * @param moodle_page $page

     * @return bool

     */

    public function can_block_be_added(moodle_page $page): bool {

        return is_enabled_auth('mnet');

    }

}