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<?php |
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namespace Dudlewebs\WPMCS\s3\Aws\Api\Parser; |
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|
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use Iterator; |
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use Dudlewebs\WPMCS\s3\Aws\Exception\EventStreamDataException; |
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use Dudlewebs\WPMCS\s3\Aws\Api\Parser\Exception\ParserException; |
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use Dudlewebs\WPMCS\s3\Aws\Api\StructureShape; |
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use Dudlewebs\WPMCS\s3\Psr\Http\Message\StreamInterface; |
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/** |
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* @internal Implements a decoder for a binary encoded event stream that will |
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* decode, validate, and provide individual events from the stream. |
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*/ |
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class EventParsingIterator implements Iterator |
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{ |
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/** @var StreamInterface */ |
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private $decodingIterator; |
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/** @var StructureShape */ |
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private $shape; |
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/** @var AbstractParser */ |
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private $parser; |
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public function __construct(StreamInterface $stream, StructureShape $shape, AbstractParser $parser) |
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{ |
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$this->decodingIterator = new DecodingEventStreamIterator($stream); |
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$this->shape = $shape; |
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$this->parser = $parser; |
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} |
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#[\ReturnTypeWillChange] |
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public function current() |
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{ |
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return $this->parseEvent($this->decodingIterator->current()); |
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} |
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#[\ReturnTypeWillChange] |
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public function key() |
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{ |
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return $this->decodingIterator->key(); |
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} |
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#[\ReturnTypeWillChange] |
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public function next() |
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{ |
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$this->decodingIterator->next(); |
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} |
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#[\ReturnTypeWillChange] |
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public function rewind() |
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{ |
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$this->decodingIterator->rewind(); |
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} |
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#[\ReturnTypeWillChange] |
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public function valid() |
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{ |
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return $this->decodingIterator->valid(); |
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} |
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private function parseEvent(array $event) |
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{ |
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if (!empty($event['headers'][':message-type'])) { |
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if ($event['headers'][':message-type'] === 'error') { |
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return $this->parseError($event); |
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} |
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if ($event['headers'][':message-type'] !== 'event') { |
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throw new ParserException('Failed to parse unknown message type.'); |
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} |
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} |
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if (empty($event['headers'][':event-type'])) { |
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throw new ParserException('Failed to parse without event type.'); |
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} |
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$eventShape = $this->shape->getMember($event['headers'][':event-type']); |
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$parsedEvent = []; |
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foreach ($eventShape['members'] as $shape => $details) { |
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if (!empty($details['eventpayload'])) { |
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$payloadShape = $eventShape->getMember($shape); |
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if ($payloadShape['type'] === 'blob') { |
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$parsedEvent[$shape] = $event['payload']; |
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} else { |
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$parsedEvent[$shape] = $this->parser->parseMemberFromStream($event['payload'], $payloadShape, null); |
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} |
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} else { |
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$parsedEvent[$shape] = $event['headers'][$shape]; |
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} |
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} |
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return [$event['headers'][':event-type'] => $parsedEvent]; |
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} |
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private function parseError(array $event) |
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{ |
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throw new EventStreamDataException($event['headers'][':error-code'], $event['headers'][':error-message']); |
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} |
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} |
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