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<?php
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namespace Aws\Api\Serializer;
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use Aws\Api\Service;
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use Aws\CommandInterface;
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use Aws\EndpointV2\EndpointProviderV2;
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use Aws\EndpointV2\EndpointV2SerializerTrait;
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use Aws\EndpointV2\Ruleset\RulesetEndpoint;
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use GuzzleHttp\Psr7\Request;
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use Psr\Http\Message\RequestInterface;
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/**
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 * Serializes a query protocol request.
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 * @internal
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 */
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class QuerySerializer
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{
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    use EndpointV2SerializerTrait;
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    private $endpoint;
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    private $api;
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    private $paramBuilder;
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    public function __construct(
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        Service $api,
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        $endpoint,
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        ?callable $paramBuilder = null
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    ) {
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        $this->api = $api;
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        $this->endpoint = $endpoint;
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        $this->paramBuilder = $paramBuilder ?: new QueryParamBuilder();
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    }
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    /**
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     * When invoked with an AWS command, returns a serialization array
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     * containing "method", "uri", "headers", and "body" key value pairs.
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     *
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     * @param CommandInterface $command Command to serialize into a request.
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     * @param $endpointProvider Provider used for dynamic endpoint resolution.
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     * @param $clientArgs Client arguments used for dynamic endpoint resolution.
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     *
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     * @return RequestInterface
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     */
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    public function __invoke(
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        CommandInterface $command,
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        $endpoint = null
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    )
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    {
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        $operation = $this->api->getOperation($command->getName());
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        $body = [
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            'Action'  => $command->getName(),
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            'Version' => $this->api->getMetadata('apiVersion')
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        ];
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        $commandArgs = $command->toArray();
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        // Only build up the parameters when there are parameters to build
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        if ($commandArgs) {
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            $body += call_user_func(
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                $this->paramBuilder,
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                $operation->getInput(),
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                $commandArgs
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            );
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        }
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        $body = http_build_query($body, '', '&', PHP_QUERY_RFC3986);
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        $headers = [
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            'Content-Length' => strlen($body),
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            'Content-Type'   => 'application/x-www-form-urlencoded'
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        ];
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        if ($endpoint instanceof RulesetEndpoint) {
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            $this->setEndpointV2RequestOptions($endpoint, $headers);
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        }
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        return new Request(
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            'POST',
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            $this->endpoint,
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            $headers,
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            $body
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        );
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    }
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}