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<?php
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namespace Aws\Api\Parser;
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use Aws\Api\StructureShape;
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use Aws\CommandInterface;
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use Aws\Exception\AwsException;
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use Psr\Http\Message\ResponseInterface;
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use Psr\Http\Message\StreamInterface;
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use GuzzleHttp\Psr7;
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/**
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 * @internal Decorates a parser and validates the x-amz-crc32 header.
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 */
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class Crc32ValidatingParser extends AbstractParser
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{
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    /**
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     * @param callable $parser Parser to wrap.
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     */
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    public function __construct(callable $parser)
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    {
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        $this->parser = $parser;
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    }
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    public function __invoke(
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        CommandInterface $command,
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        ResponseInterface $response
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    ) {
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        if ($expected = $response->getHeaderLine('x-amz-crc32')) {
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            $hash = hexdec(Psr7\Utils::hash($response->getBody(), 'crc32b'));
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            if ($expected != $hash) {
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                throw new AwsException(
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                    "crc32 mismatch. Expected {$expected}, found {$hash}.",
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                    $command,
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                    [
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                        'code'             => 'ClientChecksumMismatch',
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                        'connection_error' => true,
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                        'response'         => $response
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                    ]
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                );
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            }
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        }
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        $fn = $this->parser;
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        return $fn($command, $response);
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    }
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    public function parseMemberFromStream(
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        StreamInterface $stream,
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        StructureShape $member,
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        $response
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    ) {
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        return $this->parser->parseMemberFromStream($stream, $member, $response);
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    }
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}