QueueService.php

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<?php
namespace OliverHader\IrreTutorial\Service;

/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */

class QueueService implements \TYPO3\CMS\Core\SingletonInterface
{
    protected $calls;

    protected $values = [];

    protected $active = false;

    public function set(array $calls)
    {
        $this->calls = $calls;
        $this->active = true;
    }

    public function get()
    {
        return $this->calls;
    }

    public function isActive()
    {
        return $this->active;
    }

    public function setActive($active = true)
    {
        $this->active = (bool)$active;
    }

    public function shift()
    {
        return array_shift($this->calls);
    }

    public function addValue($identifier, $value)
    {
        $this->values[$identifier] = $value;
    }

    public function getValues()
    {
        return $this->values;
    }
}