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✏️ Editing: EndpointV2SerializerTrait.php

<?php

namespace Aws\EndpointV2;

use Aws\Api\Serializer\RestSerializer;
use GuzzleHttp\Psr7\Uri;

/**
 * Set of helper functions used to set endpoints and endpoint
 * properties derived from dynamic endpoint resolution.
 *
 * @internal
 */
trait EndpointV2SerializerTrait
{
    /**
     * Merges endpoint resolution arguments passed from the client
     * and command and attempts to resolve an endpoint. Headers and
     * auth schemes may be returned in a resolved endpoint object.
     * A resolved endpoint uri and headers will be applied to the request.
     * Auth schemes are applied to the command and compared against the default
     * auth scheme at signing.
     *
     * @internal
     */
    private function setRequestOptions(
        $endpointProvider,
        $command,
        $operation,
        $commandArgs,
        $clientArgs,
        &$headers
    )
    {
        $providerArgs = $this->resolveProviderArgs(
            $endpointProvider,
            $operation,
            $commandArgs,
            $clientArgs
        );
        $endpoint = $endpointProvider->resolveEndpoint($providerArgs);
        $resolvedUrl = $endpoint->getUrl();

$this->applyScheme($resolvedUrl);
        $this->endpoint = $resolvedUrl;
        $this->applyAuthSchemeToCommand($endpoint, $command);
        $this->applyHeaders($endpoint, $headers);
    }

private function resolveProviderArgs(
        $endpointProvider,
        $operation,
        $commandArgs,
        $clientArgs
    )
    {
        $rulesetParams = $endpointProvider->getRuleset()->getParameters();
        $endpointCommandArgs = $this->filterEndpointCommandArgs(
            $rulesetParams,
            $commandArgs
        );
        $staticContextParams = $this->bindStaticContextParams(
            $operation->getStaticContextParams()
        );
        $contextParams = $this->bindContextParams(
            $commandArgs, $operation->getContextParams()
        );
        $providerArgs = $this->normalizeEndpointProviderArgs(
            $endpointCommandArgs,
            $clientArgs,
            $contextParams,
            $staticContextParams
        );

return $providerArgs;
    }

/**
     * Merges endpoint provider arguments from different sources.
     * Client built-ins are superseded by client context params.
     * Client context params are superseded by context params on
     * an input member's shape.  Context params are superseded by
     * static context params. The result of this combination is then
     * merged with any appropriate arguments from the command.
     */
    private function normalizeEndpointProviderArgs(
        $endpointCommandArgs,
        $clientArgs,
        $contextParams,
        $staticContextParams
    )
    {
        $commandContextParams = array_merge($contextParams, $staticContextParams);
        $combinedEndpointArgs = array_merge($clientArgs, $commandContextParams);

return array_merge($combinedEndpointArgs, $endpointCommandArgs);
    }

private function bindContextParams($commandArgs, $contextParams)
    {
        $scopedParams = [];

foreach($contextParams as $name => $spec) {
            if (isset($commandArgs[$spec['shape']])) {
                $scopedParams[$name] = $commandArgs[$spec['shape']];
            }
        }
        return $scopedParams;
    }

private function bindStaticContextParams($staticContextParams)
    {
        $scopedParams = [];

forEach($staticContextParams as $paramName => $paramValue) {
            $scopedParams[$paramName] = $paramValue['value'];
        }
        return $scopedParams;
    }

private function filterEndpointCommandArgs(
        $rulesetParams,
        $commandArgs
    )
    {
        $endpointMiddlewareOpts = [
            '@use_dual_stack_endpoint' => 'UseDualStack',
            '@use_accelerate_endpoint' => 'Accelerate',
            '@use_path_style_endpoint' => 'ForcePathStyle'
        ];

$filteredArgs = [];

foreach($rulesetParams as $name => $value) {
            if (isset($commandArgs[$name])) {
                if (!empty($value->getBuiltIn())) {
                    continue;
                }
                $filteredArgs[$name] = $commandArgs[$name];
            }
        }

if ($this->api->getServiceName() === 's3') {
            foreach($endpointMiddlewareOpts as $optionName => $newValue) {
                if (isset($commandArgs[$optionName])) {
                    $filteredArgs[$newValue] = $commandArgs[$optionName];
                }
            }
        }

return $filteredArgs;
    }

private function applyHeaders($endpoint, &$headers)
    {
        if (!is_null($endpoint->getHeaders())) {
           $headers = array_merge(
               $headers,
               $endpoint->getHeaders()
           );
        }
    }

private function applyAuthSchemeToCommand($endpoint, $command)
    {
        if (isset($endpoint->getProperties()['authSchemes'])) {
            $authScheme = $this->selectAuthScheme(
                $endpoint->getProperties()['authSchemes']
            );
            $command->setAuthSchemes($authScheme);
        }
    }

private function selectAuthScheme($authSchemes)
    {
        $validAuthSchemes = ['sigv4', 'sigv4a', 'none', 'bearer'];
        $invalidAuthSchemes = [];

foreach($authSchemes as $authScheme) {
            if (in_array($authScheme['name'], $validAuthSchemes)) {
                return $this->normalizeAuthScheme($authScheme);
            } else {
                $invalidAuthSchemes[] = "`{$authScheme['name']}`";
            }
        }

$invalidAuthSchemesString = implode(', ', $invalidAuthSchemes);
        $validAuthSchemesString = '`' . implode('`, `', $validAuthSchemes) . '`';
        throw new \InvalidArgumentException(
            "This operation requests {$invalidAuthSchemesString}"
            . " auth schemes, but the client only supports {$validAuthSchemesString}."
        );
    }

private function normalizeAuthScheme($authScheme)
    {
       /*
            sigv4a will contain a regionSet property. which is guaranteed to be `*`
            for now.  The SigV4 class handles this automatically for now. It seems
            complexity will be added here in the future.
       */
        $normalizedAuthScheme = [];

if (isset($authScheme['disableDoubleEncoding'])
            && $authScheme['disableDoubleEncoding'] === true
            && $authScheme['name'] !== 'sigv4a'
        ) {
            $normalizedAuthScheme['version'] = 's3v4';
        } elseif ($authScheme['name'] === 'none') {
            $normalizedAuthScheme['version'] = 'anonymous';
        }
        else {
            $normalizedAuthScheme['version'] = str_replace(
                'sig', '', $authScheme['name']
            );
        }

$normalizedAuthScheme['name'] = isset($authScheme['signingName']) ?
            $authScheme['signingName'] : null;
        $normalizedAuthScheme['region'] = isset($authScheme['signingRegion']) ?
            $authScheme['signingRegion'] : null;
        $normalizedAuthScheme['signingRegionSet'] = isset($authScheme['signingRegionSet']) ?
            $authScheme['signingRegionSet'] : null;

return $normalizedAuthScheme;
    }

private function applyScheme(&$resolvedUrl)
    {
        $resolvedEndpointScheme = parse_url($resolvedUrl, PHP_URL_SCHEME);
        $scheme = $this->endpoint instanceof Uri
            ? $this->endpoint->getScheme()
            : parse_url($this->endpoint, PHP_URL_SCHEME);

if (!empty($scheme) && $scheme !== $resolvedEndpointScheme) {
            $resolvedUrl = str_replace(
                $resolvedEndpointScheme,
                $scheme,
                $resolvedUrl
            );
        }
    }
}

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