<?php

/**
 * This program 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; under version 2
 * of the License (non-upgradable).
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * Copyright (c) 2017 (original work) Open Assessment Technologies SA (under the project TAO-PRODUCT);
 *
 */

namespace oat\taoTaskQueue\model\Task;

/**
 * ChildTaskAwareTrait
 *
 * @deprecated Use \oat\tao\model\taskQueue\Task\ChildTaskAwareTrait
 *
 * @author Gyula Szucs <gyula@taotesting.com>
 */
trait ChildTaskAwareTrait
{
    private $children = [];

    /**
     * @param string $taskId
     * @return $this
     */
    public function addChildId($taskId)
    {
        if (in_array($taskId, $this->children)) {
            throw new \InvalidArgumentException('Child ' . $taskId . ' has been added.');
        }

        $this->children[] = $taskId;

        return $this;
    }

    /**
     * @return bool
     */
    public function hasChildren()
    {
        return !empty($this->children);
    }

    /**
     * @return array
     */
    public function getChildren()
    {
        return $this->children;
    }
}