progress.php

<?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/>.

/**
 * Performs a progress bar test
 *
 * @package    tool_heartbeat
 * @copyright  2017 Brendan Heywood <brendan@catalyst-au.net>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
define('NO_OUTPUT_BUFFERING', true); // progress bar is used here

require(__DIR__ . '/../../../config.php');

$syscontext = context_system::instance();
$PAGE->set_url('/admin/tool/heartbeat/progress.php');
$PAGE->set_context($syscontext);
$PAGE->set_cacheable(false);
echo $OUTPUT->header();
echo $OUTPUT->heading(get_string('progress', 'tool_heartbeat'));
echo get_string('progresshelp', 'tool_heartbeat');
$progressbar = new progress_bar();
$progressbar->create();
echo $OUTPUT->footer();

// Total should be 10 seconds. This has been tuned a few times and the
// story here is there is an intermittent slowness somewhere in the stack
// which means that a small percentage of checks have a long TTFB and
// so icinga / gocd checks fail. This is likely to be an issue in the
// stack and not the test, so we have just added more margin here.
$total = 10;
$progressbar->update_full(0, '0%');
for ($c = 1; $c <= 100; $c++) {
    usleep($total * 1000000 / 100);
    $progressbar->update_full($c, $c . '%');
}