guard_clauses_05.php

<?php

public function unlock($orderId, $userId)
{
    $redis = $this->app['cache'];

    if (empty($this->type) || empty($orderId) || !in_array($this->type, $this->availableType)) {
        throw new LockException("Missing/Invalid parameters. Can't unlock for type: " . $this->type . " with id: " . $orderId);
    }

    $result = $redis->hGet(sprintf(self::REDIS_CACHE_TEMPORARY_LOCK, $this->type), $orderId);

    if (empty($result)) {
        throw new LockException("This order wasn't locked. Can't unlock");
    }

    // lock if it's the same user who try to unlock
    $data = json_decode($result, true);
    
    if ($userId != $data['user']['id']) {
        throw new LockException("Unlock failed. You can't unlock something that isn't yours");
    }

    $result = $redis->hDel(sprintf(self::REDIS_CACHE_TEMPORARY_LOCK, $this->type), $orderId);

    if ($result != true) {
        throw new LockException("Unlock failed. Please try again");
    }

    return true;
}