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<?php
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namespace Aws\Api\Parser;
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use Aws\Api\DateTimeResult;
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use Aws\Api\Shape;
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use Psr\Http\Message\ResponseInterface;
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trait MetadataParserTrait
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{
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    /**
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     * Extract a single header from the response into the result.
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     */
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    protected function extractHeader(
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        $name,
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        Shape $shape,
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        ResponseInterface $response,
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        &$result
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    ) {
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        $value = $response->getHeaderLine($shape['locationName'] ?: $name);
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        switch ($shape->getType()) {
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            case 'float':
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            case 'double':
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                $value = (float) $value;
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                break;
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            case 'long':
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                $value = (int) $value;
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                break;
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            case 'boolean':
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                $value = filter_var($value, FILTER_VALIDATE_BOOLEAN);
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                break;
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            case 'blob':
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                $value = base64_decode($value);
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                break;
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            case 'timestamp':
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                try {
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                    $value = DateTimeResult::fromTimestamp(
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                        $value,
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                        !empty($shape['timestampFormat']) ? $shape['timestampFormat'] : null
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                    );
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                    break;
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                } catch (\Exception $e) {
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                    // If the value cannot be parsed, then do not add it to the
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                    // output structure.
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                    return;
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                }
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            case 'string':
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                if ($shape['jsonvalue']) {
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                    $value = $this->parseJson(base64_decode($value), $response);
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                }
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                break;
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        }
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        $result[$name] = $value;
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    }
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    /**
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     * Extract a map of headers with an optional prefix from the response.
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     */
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    protected function extractHeaders(
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        $name,
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        Shape $shape,
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        ResponseInterface $response,
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        &$result
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    ) {
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        // Check if the headers are prefixed by a location name
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        $result[$name] = [];
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        $prefix = $shape['locationName'];
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        $prefixLen = strlen($prefix);
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        foreach ($response->getHeaders() as $k => $values) {
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            if (!$prefixLen) {
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                $result[$name][$k] = implode(', ', $values);
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            } elseif (stripos($k, $prefix) === 0) {
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                $result[$name][substr($k, $prefixLen)] = implode(', ', $values);
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            }
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        }
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    }
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    /**
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     * Places the status code of the response into the result array.
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     */
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    protected function extractStatus(
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        $name,
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        ResponseInterface $response,
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        array &$result
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    ) {
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        $result[$name] = (int) $response->getStatusCode();
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    }
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}