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<?php |
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/** |
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* This file is part of PHPinnacle/Ridge. |
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* |
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* (c) PHPinnacle Team <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types = 1); |
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namespace PHPinnacle\Ridge; |
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use function Amp\asyncCall; |
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final class Consumer |
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{ |
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/** |
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* @var Channel |
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*/ |
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private $channel; |
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/** |
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* @var Buffer |
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*/ |
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private $buffer; |
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/** |
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* @var callable[] |
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*/ |
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private $callbacks = []; |
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/** |
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* @var Protocol\BasicDeliverFrame |
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*/ |
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private $deliver; |
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/** |
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* @var Protocol\ContentHeaderFrame |
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*/ |
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private $header; |
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/** |
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* @var int |
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*/ |
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private $remaining = 0; |
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/** |
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* @param Channel $channel |
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*/ |
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public function __construct(Channel $channel) |
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{ |
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$this->channel = $channel; |
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$this->buffer = new Buffer; |
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} |
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/** |
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* @param string $consumerTag |
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* @param callable $callback |
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*/ |
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public function listen(string $consumerTag, callable $callback): void |
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{ |
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$this->callbacks[$consumerTag] = $callback; |
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} |
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/** |
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* @param string $consumerTag |
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*/ |
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public function cancel(string $consumerTag): void |
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{ |
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unset($this->callbacks[$consumerTag]); |
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} |
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/** |
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* @param Protocol\BasicDeliverFrame $frame |
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* |
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* @return void |
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*/ |
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public function onDeliver(Protocol\BasicDeliverFrame $frame): void |
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{ |
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if (!isset($this->callbacks[$frame->consumerTag])) { |
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return; |
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} |
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$this->deliver = $frame; |
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} |
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/** |
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* @param Protocol\ContentHeaderFrame $frame |
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* |
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* @return void |
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*/ |
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public function onHeader(Protocol\ContentHeaderFrame $frame): void |
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{ |
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if ($this->deliver === null) { |
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return; |
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} |
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$this->header = $frame; |
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$this->remaining = $frame->bodySize; |
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$this->runCallbacks(); |
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} |
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/** |
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* @param Protocol\ContentBodyFrame $frame |
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* |
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* @return void |
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*/ |
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public function onBody(Protocol\ContentBodyFrame $frame): void |
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{ |
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if ($this->header === null) { |
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return; |
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} |
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$this->buffer->append($frame->payload); |
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$this->remaining -= $frame->size; |
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if ($this->remaining < 0) { |
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throw Exception\ChannelException::bodyOverflow($this->remaining); |
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} |
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$this->runCallbacks(); |
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} |
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/** |
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* @return void |
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*/ |
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private function runCallbacks(): void |
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{ |
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if ($this->remaining !== 0) { |
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return; |
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} |
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$consumer = $this->deliver->consumerTag; |
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$message = new Message( |
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$this->buffer->flush(), |
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$this->deliver->exchange, |
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$this->deliver->routingKey, |
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$this->deliver->consumerTag, |
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$this->deliver->deliveryTag, |
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$this->deliver->redelivered, |
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$this->header->toArray() |
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); |
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$this->deliver = null; |
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$this->header = null; |
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asyncCall($this->callbacks[$consumer], $message, $this->channel); |
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} |
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} |
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phpinnacle /
ridge
