icingaweb2/modules/setup/library/Setup/Requirement/WebLibraryRequirement.php

<?php
/* Icinga Web 2 | (c) 2021 Icinga GmbH | GPLv2+ */

namespace Icinga\Module\Setup\Requirement;

use Icinga\Application\Icinga;
use Icinga\Module\Setup\Requirement;

class WebLibraryRequirement extends Requirement
{
    protected function evaluate()
    {
        if (count($this->getCondition()) === 2) {
            list($name, $version) = $this->getCondition();
            $op = '';
        } else {
            list($name, $op, $version) = $this->getCondition();
        }

        $libs = Icinga::app()->getLibraries();
        if (! $libs->has($name)) {
            $this->setStateText(sprintf(mt('setup', '%s is not installed'), $this->getAlias()));
            return false;
        }

        $this->setStateText(sprintf(mt('setup', '%s version: %s'), $this->getAlias(), $libs->get($name)->getVersion()));

        if (! is_string($version)) { // null, bool
            return $libs->has($name, $version);
        }

        return $libs->has($name, $op . $version);
    }
}