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/>.

/**

 * Online users block.

 *

 * @package    block_online_users

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

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

 */

use block_online_users\fetcher;

/**

 * This block needs to be reworked.

 * The new roles system does away with the concepts of rigid student and

 * teacher roles.

 */

class block_online_users extends block_base {

    function init() {

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

    }

    function has_config() {

        return true;

    }

    function get_content() {

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

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

            return $this->content;

        }

        $this->content = new stdClass;

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

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

        if (empty($this->instance)) {

            return $this->content;

        }

        $timetoshowusers = 300; //Seconds default

        if (isset($CFG->block_online_users_timetosee)) {

            $timetoshowusers = $CFG->block_online_users_timetosee * 60;

        }

        $now = time();

        //Calculate if we are in separate groups

        $isseparategroups = ($this->page->course->groupmode == SEPARATEGROUPS

                             && $this->page->course->groupmodeforce

                             && !has_capability('moodle/site:accessallgroups', $this->page->context));

        //Get the user current group

        $currentgroup = $isseparategroups ? groups_get_course_group($this->page->course) : NULL;

        $sitelevel = $this->page->course->id == SITEID || $this->page->context->contextlevel < CONTEXT_COURSE;

        $onlineusers = new fetcher($currentgroup, $now, $timetoshowusers, $this->page->context,

                $sitelevel, $this->page->course->id);

        //Calculate minutes

        $minutes  = floor($timetoshowusers/60);

        $periodminutes = get_string('periodnminutes', 'block_online_users', $minutes);

        // Count users.

        $usercount = $onlineusers->count_users();

        if ($usercount === 0) {

            $usercount = get_string('nouser', 'block_online_users');

        } else if ($usercount === 1) {

            $usercount = get_string('numuser', 'block_online_users', $usercount);

        } else {

            $usercount = get_string('numusers', 'block_online_users', $usercount);

        }

        $this->content->text = '<div class="info">'.$usercount.' ('.$periodminutes.')</div>';

        // Verify if we can see the list of users, if not just print number of users.

        // If the current user is not logged in OR it's a guest then don't show any users.

        if (!has_capability('block/online_users:viewlist', $this->page->context)

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

            return $this->content;

        }

        $userlimit = 50; // We'll just take the most recent 50 maximum.

        $initialcount = 0;

        if ($users = $onlineusers->get_users($userlimit)) {

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

            $initialcount = count($users);

            foreach ($users as $user) {

                if (!user_can_view_profile($user)) {

                    unset($users[$user->id]);

                    continue;

                }

                $users[$user->id]->fullname = fullname($user);

            }

        } else {

            $users = array();

        }

        //Now, we have in users, the list of users to show

        //Because they are online

        if (!empty($users)) {

            $this->page->requires->js_call_amd('block_online_users/change_user_visibility', 'init');

            //Accessibility: Don't want 'Alt' text for the user picture; DO want it for the envelope/message link (existing lang string).

            //Accessibility: Converted <div> to <ul>, inherit existing classes & styles.

            $this->content->text .= "<ul class='list'>\n";

            if (isloggedin() && has_capability('moodle/site:sendmessage', $this->page->context)

                           && !empty($CFG->messaging) && !isguestuser()) {

                $canshowicon = true;

            } else {

                $canshowicon = false;

            }

            foreach ($users as $user) {

                $this->content->text .= '<li class="listentry">';

                $timeago = format_time($now - $user->lastaccess); //bruno to calculate correctly on frontpage

                if (isguestuser($user)) {

                    $this->content->text .= '<div class="user">'.$OUTPUT->user_picture($user, array('size'=>16, 'alttext'=>false));

                    $this->content->text .= get_string('guestuser').'</div>';

                } else { // Not a guest user.

                    $this->content->text .= '<div class="user">';

                    $this->content->text .= '<a href="'.$CFG->wwwroot.'/user/view.php?id='.$user->id.'&amp;course='.$this->page->course->id.'" title="'.$timeago.'">';

                    $avataroptions = [

                        'size' => 30,

                        'class' => 'userpicture align-middle',

                        'visibletoscreenreaders' => false,

                        'link' => false,

                    ];

                    $this->content->text .= $OUTPUT->user_picture($user, $avataroptions) . $user->fullname . '</a></div>';

                    if ($USER->id == $user->id) {

                        if ($CFG->block_online_users_onlinestatushiding) {

                            $action = ($user->uservisibility != null && $user->uservisibility == 0) ? 'show' : 'hide';

                            $anchortagcontents = $OUTPUT->pix_icon('t/' . $action,

                                get_string('online_status:' . $action, 'block_online_users'));

                            $anchortag = html_writer::link("", $anchortagcontents,

                                array('title' => get_string('online_status:' . $action, 'block_online_users'),

                                    'data-action' => $action, 'data-userid' => $user->id, 'id' => 'change-user-visibility'));

                            $this->content->text .= '<div class="uservisibility">' . $anchortag . '</div>';

                        }

                    } else {

                        if ($canshowicon) {  // Only when logged in and messaging active etc.

                            $anchortagcontents = $OUTPUT->pix_icon('t/message', get_string('messageselectadd'));

                            $anchorurl = new moodle_url('/message/index.php', array('id' => $user->id));

                            $anchortag = html_writer::link($anchorurl, $anchortagcontents,

                                array('title' => get_string('messageselectadd')));

                            $this->content->text .= '<div class="message">'.$anchortag.'</div>';

                        }

                    }

                }

                $this->content->text .= "</li>\n";

            }

            if ($initialcount - count($users) > 0) {

                $this->content->text .= '<li class="listentry"><div class="otherusers">';

                $this->content->text .= html_writer::span(

                    get_string('otherusers', 'block_online_users', $initialcount - count($users))

                );

                $this->content->text .= "</div>";

                $this->content->text .= "</li>\n";

            }

            $this->content->text .= '</ul><div class="clearer"><!-- --></div>';

        }

        return $this->content;

    }

    /**

     * Return the plugin config settings for external functions.

     *

     * @return stdClass the configs for both the block instance and plugin

     * @since Moodle 3.8

     */

    public function get_config_for_external() {

        global $CFG;

        // Return all settings for all users since it is safe (no private keys, etc..).

        $configs = (object) [

            'timetosee' => $CFG->block_online_users_timetosee,

            'onlinestatushiding' => $CFG->block_online_users_onlinestatushiding

        ];

        return (object) [

            'instance' => new stdClass(),

            'plugin' => $configs,

        ];

    }

}