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