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<?php |
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namespace BenTools\MercurePHP\Storage\Redis; |
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use BenTools\MercurePHP\Security\TopicMatcher; |
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use BenTools\MercurePHP\Storage\StorageInterface; |
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use BenTools\MercurePHP\Model\Message; |
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use Clue\React\Redis\Client as AsynchronousClient; |
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use Predis\Client as SynchronousClient; |
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use React\Promise\PromiseInterface; |
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use function React\Promise\resolve; |
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final class RedisStorage implements StorageInterface |
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{ |
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private AsynchronousClient $async; |
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private SynchronousClient $sync; |
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public function __construct(AsynchronousClient $asyncClient, SynchronousClient $syncClient) |
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{ |
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$this->async = $asyncClient; |
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$this->sync = $syncClient; |
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} |
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public function retrieveMessagesAfterId(string $id, array $subscribedTopics): PromiseInterface |
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{ |
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return resolve($this->findNextMessages($id, $subscribedTopics)); |
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} |
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public function storeMessage(string $topic, Message $message): PromiseInterface |
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{ |
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$id = $message->getId(); |
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$payload = \json_encode($message, \JSON_THROW_ON_ERROR); |
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/** @phpstan-ignore-next-line */ |
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return $this->async->set('data:' . $id, $topic . \PHP_EOL . $payload) |
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->then(fn() => $this->getLastEventId()) |
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->then(fn(?string $lastEventId) => $this->storeLastEventId($lastEventId, $id)) |
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->then(fn() => $id); |
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} |
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private function getLastEventId(): PromiseInterface |
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{ |
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return $this->async->get('Last-Event-ID'); /** @phpstan-ignore-line */ |
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} |
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private function storeLastEventId(?string $previousEventId, string $newEventId): PromiseInterface |
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{ |
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$promise = $this->async->set('Last-Event-ID', $newEventId); /** @phpstan-ignore-line */ |
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if (null === $previousEventId) { |
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return $promise; |
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} |
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/** @phpstan-ignore-next-line */ |
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return $promise->then(fn() => $this->async->set('next:' . $previousEventId, $newEventId)); |
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} |
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private function findNextMessages(string $id, array $subscribedTopics): iterable |
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{ |
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$nextId = $this->sync->get('next:' . $id); |
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if (null === $nextId) { |
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return []; |
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} |
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$payload = $this->sync->get('data:' . $nextId); |
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if (null === $payload) { |
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return []; |
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} |
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$item = \explode(\PHP_EOL, $payload); |
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$topic = \array_shift($item); |
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$message = Message::fromArray( |
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\json_decode( |
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\implode(\PHP_EOL, $item), |
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true, |
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512, |
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\JSON_THROW_ON_ERROR |
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) |
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); |
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if (TopicMatcher::matchesTopicSelectors($topic, $subscribedTopics)) { |
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yield $topic => $message; |
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} |
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yield from $this->findNextMessages($message->getId(), $subscribedTopics); // Sync client needed because of this |
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} |
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} |
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bpolaszek /
mercure-php-hub
