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<?php
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namespace Aws\EndpointV2\Rule;
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use Aws\EndpointV2\Ruleset\RulesetStandardLibrary;
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use Aws\EndpointV2\Ruleset\RulesetEndpoint;
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Class EndpointRule extends AbstractRule
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{
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/** @var array */
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private $endpoint;
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public function __construct(array $definition)
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{
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parent::__construct($definition);
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$this->endpoint = $definition['endpoint'];
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}
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/**
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* @return array
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*/
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public function getEndpoint()
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{
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return $this->endpoint;
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}
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/**
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* If all the rule's conditions are met, return the resolved
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* endpoint object.
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*
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* @return RulesetEndpoint | null
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*/
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public function evaluate(array $inputParameters, RulesetStandardLibrary $standardLibrary)
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{
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if ($this->evaluateConditions($inputParameters, $standardLibrary)) {
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return $this->resolve($inputParameters, $standardLibrary);
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}
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return false;
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}
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/**
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* Given input parameters, resolve an endpoint in its entirety.
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*
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* @return RulesetEndpoint
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*/
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private function resolve(
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array $inputParameters,
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RulesetStandardLibrary $standardLibrary
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)
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{
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$uri = $standardLibrary->resolveValue($this->endpoint['url'], $inputParameters);
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$properties = isset($this->endpoint['properties'])
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? $this->resolveProperties($this->endpoint['properties'], $inputParameters, $standardLibrary)
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: null;
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$headers = $this->resolveHeaders($inputParameters, $standardLibrary);
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return new RulesetEndpoint($uri, $properties, $headers);
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}
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/**
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* Recurse through an endpoint's `properties` attribute, resolving template
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* strings when found. Return the fully resolved attribute.
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*
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* @return array
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*/
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private function resolveProperties(
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$properties,
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array $inputParameters,
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RulesetStandardLibrary $standardLibrary
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)
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{
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if (is_array($properties)) {
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$propertiesArr = [];
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foreach($properties as $key => $val) {
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$propertiesArr[$key] = $this->resolveProperties($val, $inputParameters, $standardLibrary);
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}
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return $propertiesArr;
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} elseif ($standardLibrary->isTemplate($properties)) {
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return $standardLibrary->resolveTemplateString($properties, $inputParameters);
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}
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return $properties;
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}
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/**
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* If present, iterate through an endpoint's headers attribute resolving
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* values along the way. Return the fully resolved attribute.
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*
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* @return array
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*/
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private function resolveHeaders(
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array $inputParameters,
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RulesetStandardLibrary $standardLibrary
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)
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{
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$headers = isset($this->endpoint['headers']) ? $this->endpoint['headers'] : null;
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if (is_null($headers)) {
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return null;
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}
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$resolvedHeaders = [];
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foreach($headers as $headerName => $headerValues) {
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$resolvedValues = [];
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foreach($headerValues as $value) {
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$resolvedValue = $standardLibrary->resolveValue($value, $inputParameters, $standardLibrary);
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$resolvedValues[] = $resolvedValue;
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}
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$resolvedHeaders[$headerName] = $resolvedValues;
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}
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return $resolvedHeaders;
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}
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}
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