<?php
/**
 * MineAdmin is committed to providing solutions for quickly building web applications
 * Please view the LICENSE file that was distributed with this source code,
 * For the full copyright and license information.
 * Thank you very much for using MineAdmin.
 *
 * @Author X.Mo<root@imoi.cn>
 * @Link   https://gitee.com/xmo/MineAdmin
 */

declare(strict_types=1);
namespace Builder\Crontab\Mutex;

use Hyperf\Redis\RedisFactory;
use Builder\Crontab\MineCrontab;

class RedisTaskMutex implements TaskMutex
{
    /**
     * @var RedisFactory
     */
    private $redisFactory;

    public function __construct(RedisFactory $redisFactory)
    {
        $this->redisFactory = $redisFactory;
    }

    /**
     * Attempt to obtain a task mutex for the given crontab.
     * @param MineCrontab $crontab
     * @return bool
     */
    public function create(MineCrontab $crontab): bool
    {
        return (bool) $this->redisFactory->get($crontab->getMutexPool())->set(
            $this->getMutexName($crontab),
            $crontab->getName(),
            ['NX', 'EX' => $crontab->getMutexExpires()]
        );
    }

    /**
     * Determine if a task mutex exists for the given crontab.
     * @param MineCrontab $crontab
     * @return bool
     */
    public function exists(MineCrontab $crontab): bool
    {
        return (bool) $this->redisFactory->get($crontab->getMutexPool())->exists(
            $this->getMutexName($crontab)
        );
    }

    /**
     * Clear the task mutex for the given crontab.
     * @param MineCrontab $crontab
     */
    public function remove(MineCrontab $crontab)
    {
        $this->redisFactory->get($crontab->getMutexPool())->del(
            $this->getMutexName($crontab)
        );
    }

    protected function getMutexName(MineCrontab $crontab): string
    {
        return 'framework' . DIRECTORY_SEPARATOR . 'crontab-' . sha1($crontab->getName() . $crontab->getRule());
    }
}