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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Yii\Web\RateLimiter; |
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use Psr\Http\Message\ServerRequestInterface; |
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final class Counter implements CounterInterface |
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{ |
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private int $interval = 360; |
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private ?string $id = null; |
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/** |
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* @var callable |
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*/ |
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private $idCallback; |
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private bool $init = false; |
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private StorageInterface $storage; |
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public function __construct(StorageInterface $storage) |
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{ |
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$this->storage = $storage; |
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} |
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public function init(ServerRequestInterface $request): self |
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{ |
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$this->id = $this->generateId($request); |
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if (!$this->storage->hasCounterValue($this->id)) { |
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$this->storage->setCounterValue($this->id, 0, $this->interval); |
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} |
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$this->init = true; |
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return $this; |
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} |
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public function setIdCallback(callable $callback): self |
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{ |
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$this->idCallback = $callback; |
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return $this; |
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} |
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public function setId(string $id): self |
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{ |
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$this->id = $id; |
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return $this; |
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} |
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public function setInterval(int $interval): self |
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{ |
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$this->interval = $interval; |
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return $this; |
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} |
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public function increment(): void |
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{ |
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$value = $this->getCounterValue(); |
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$value++; |
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$this->storage->setCounterValue($this->id, $value, $this->interval); |
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} |
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public function getCounterValue(): int |
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{ |
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$this->checkInit(); |
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return $this->storage->getCounterValue($this->id); |
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} |
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private function hasIdCallback(): bool |
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{ |
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return $this->idCallback !== null; |
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} |
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private function generateId(ServerRequestInterface $request): string |
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{ |
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if ($this->hasIdCallback()) { |
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return \call_user_func($this->idCallback, $request); |
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} |
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return $this->id ?? $this->generateIdFromRequest($request); |
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} |
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private function generateIdFromRequest(ServerRequestInterface $request): string |
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{ |
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return strtolower('rate-limiter-' . $request->getMethod() . '-' . $request->getUri()->getPath()); |
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} |
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private function checkInit(): void |
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{ |
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if (!$this->init) { |
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throw new \RuntimeException('The counter was not initiated'); |
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} |
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} |
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} |
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yiisoft /
yii-web
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