<?php
namespace JVBase\managers\queue;

if (!defined('ABSPATH')) {
	exit;
}
class Locker
{
	private string $lockKey;
	private int $timeout;
	private ?string $token = null;

	public function __construct(string $key = 'queue', int $timeout = 60)
	{
		$this->lockKey = BASE . $key . '_lock';
		$this->timeout = $timeout;
	}

	public function withLock(callable $callback): void
	{
		if (!$this->acquire()) return;

		try {
			$callback();
		} finally {
			$this->unlock();
		}
	}

	private function acquire(): bool
	{
		$this->token = bin2hex(random_bytes(8));
		return (bool) wp_cache_add($this->lockKey, $this->token, 'locks', $this->timeout);
	}

	public function unlock(): void
	{
		$current = wp_cache_get($this->lockKey, 'locks');
		if ($current === $this->token) {
			wp_cache_delete($this->lockKey, 'locks');
		}
		$this->token = null;
	}
}