Contador de emblemas por usuário - 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/>.

/**
 * Page for general user badges count
 *
 * @package    core
 * @subpackage badges
 * @copyright  2016 onwards Willian Mano {@link http://www.conecti.me/}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 * @author     Willian Mano <willianmanoaraujo@gmail.com>
 */

require_once(dirname(dirname(__FILE__)) . '/config.php');
require_once($CFG->libdir . '/badgeslib.php');

require_login();

if (empty($CFG->enablebadges)) {
    print_error('badgesdisabled', 'badges');
}

if (empty($CFG->badges_allowcoursebadges) && ($type == BADGE_TYPE_COURSE)) {
    print_error('coursebadgesdisabled', 'badges');
}

$hdr = 'Quantidade de emblemas por usuário';

$returnurl = new moodle_url('/');

$PAGE->set_url($returnurl);

$title = get_string('sitebadges', 'badges');
$PAGE->set_context(context_system::instance());
$PAGE->set_pagelayout('admin');
$PAGE->set_heading($title . ': ' . $hdr);
navigation_node::override_active_url(new moodle_url('/badges/index.php', array('type' => BADGE_TYPE_SITE)), true);

if (!has_any_capability(array(
        'moodle/badges:viewawarded',
        'moodle/badges:createbadge',
        'moodle/badges:awardbadge',
        'moodle/badges:configuremessages',
        'moodle/badges:configuredetails',
        'moodle/badges:deletebadge'), $PAGE->context)) {
    redirect($CFG->wwwroot);
}

$PAGE->set_title($hdr);

echo $OUTPUT->header();

echo $OUTPUT->heading($PAGE->heading);

echo $OUTPUT->box('', 'notifyproblem hide', 'check_connection');

$sql = "SELECT userid, u.email, u.firstname, u.lastname, count(userid) as qtd
        FROM {badge_issued} b
        INNER JOIN {user} u ON u.id = b.userid
        GROUP BY userid
        ORDER BY qtd DESC, u.firstname ASC";

$alunos = $DB->get_records_sql($sql);

$table = new html_table();
$table->attributes = array("class" => "table table-hover table-condensed table-striped");
$table->head = array(
                    'Nome completo',
                    'Email',
                    'Quantidade de emblemas'
                );
foreach($alunos as $aluno) {
    $row = new html_table_row();

    $row->cells = array(
                    $aluno->firstname . ' ' . $aluno->lastname,
                    $aluno->email,
                    $aluno->qtd
                );
    $table->data[] = $row;
}

echo html_writer::table($table);


echo $OUTPUT->footer();