Bernard Ngandu
93 lines
3.2 KiB
PHP
93 lines
3.2 KiB
PHP
<?php
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declare(strict_types=1);
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namespace App\Service;
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use App\Entity\Signal;
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use App\Exception\SubmissionRateLimitedException;
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use App\Message\SignalCreatedMessage;
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use App\Payload\SignalPayload;
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use App\Repository\SignalRepository;
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use DateTimeImmutable;
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use DateTimeZone;
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use Psr\Log\LoggerInterface;
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use Symfony\Component\DependencyInjection\Attribute\Autowire;
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use Symfony\Component\Messenger\MessageBusInterface;
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use Symfony\Component\RateLimiter\RateLimiterFactory;
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final class SignalSubmissionService
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{
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public function __construct(
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private readonly SignalRepository $signals,
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#[Autowire(service: 'limiter.signal_submission')] private readonly RateLimiterFactory $submissionLimiter,
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private readonly PointProximityValidator $proximityValidator,
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private readonly MessageBusInterface $bus,
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#[Autowire(service: 'monolog.logger.signals')] private readonly LoggerInterface $logger,
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) {
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}
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public function submit(string $clientKey, SignalPayload $payload): Signal
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{
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$this->enforceRateLimit($clientKey);
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$signalLocation = $payload->signalLocation;
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$userLocation = $payload->userLocation;
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$this->proximityValidator->assertWithinRange($userLocation, $signalLocation);
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$this->logger->info('Storing new signal submission.', [
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'client_key' => $clientKey,
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'signal_location' => [
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'lat' => round($signalLocation->getLat(), 5),
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'lng' => round($signalLocation->getLng(), 5),
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],
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'user_location' => [
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'lat' => round($userLocation->getLat(), 5),
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'lng' => round($userLocation->getLng(), 5),
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],
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]);
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$signal = (new Signal())
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->setUserKey($clientKey)
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->setUserLocation($userLocation)
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->setSignalLocation($signalLocation)
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->setCreatedAt(new DateTimeImmutable('now', new DateTimeZone('UTC')));
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$this->signals->save($signal);
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$signalId = $signal->getId();
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if ($signalId !== null) {
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$this->logger->debug('Dispatching signal created message.', [
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'signal_id' => $signalId,
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]);
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$this->bus->dispatch(new SignalCreatedMessage($signalId));
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$this->logger->info('Signal stored successfully.', [
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'signal_id' => $signalId,
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'client_key' => $clientKey,
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]);
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}
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return $signal;
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}
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private function enforceRateLimit(string $clientKey): void
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{
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$rateLimiter = $this->submissionLimiter->create($clientKey);
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$limit = $rateLimiter->consume(1);
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if (! $limit->isAccepted()) {
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$retryAfter = $limit->getRetryAfter();
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$this->logger->warning('Signal submission rejected due to rate limiting.', [
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'client_key' => $clientKey,
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'retry_after' => $retryAfter->format(DATE_ATOM),
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]);
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throw new SubmissionRateLimitedException($limit->getRetryAfter());
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}
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$this->logger->debug('Signal submission passed rate limiting.', [
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'client_key' => $clientKey,
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'remaining_tokens' => $limit->getRemainingTokens(),
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]);
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}
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}
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