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<?php
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namespace Nuwave\Lighthouse\Schema\Directives;
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use Closure;
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use GraphQL\Type\Definition\ResolveInfo;
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use Illuminate\Support\Collection;
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use Nuwave\Lighthouse\Execution\Arguments\ArgumentSet;
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use Nuwave\Lighthouse\Schema\Values\FieldValue;
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use Nuwave\Lighthouse\Support\Contracts\ArgDirective;
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use Nuwave\Lighthouse\Support\Contracts\ArgDirectiveForArray;
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use Nuwave\Lighthouse\Support\Contracts\Directive;
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use Nuwave\Lighthouse\Support\Contracts\FieldMiddleware;
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use Nuwave\Lighthouse\Support\Contracts\GraphQLContext;
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use Nuwave\Lighthouse\Support\Utils;
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abstract class ArgTraversalDirective extends BaseDirective implements FieldMiddleware
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{
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public function handleField(FieldValue $fieldValue, Closure $next): FieldValue
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{
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$resolver = $fieldValue->getResolver();
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return $next(
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$fieldValue->setResolver(
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function ($root, array $args, GraphQLContext $context, ResolveInfo $resolveInfo) use ($resolver) {
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$resolveInfo->argumentSet = $this->transformRecursively($resolveInfo->argumentSet);
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return $resolver(
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$root,
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$resolveInfo->argumentSet->toArray(),
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$context,
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$resolveInfo
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);
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}
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)
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);
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}
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public function transformRecursively(ArgumentSet $argumentSet): ArgumentSet
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{
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foreach ($argumentSet->arguments as $argument) {
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$directivesForArray = $argument->directives->filter(
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Utils::instanceofMatcher(ArgDirectiveForArray::class)
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);
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$argument->value = $this->transform($argument->value, $directivesForArray);
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$directivesForArgument = $argument->directives->filter(
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Utils::instanceofMatcher(ArgDirective::class)
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);
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$argument->value = Utils::applyEach(
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function ($value) use ($directivesForArgument) {
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if ($value instanceof ArgumentSet) {
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$value = $this->transform($value, $directivesForArgument);
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return $this->transformRecursively($value);
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} else {
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return $this->transform($value, $directivesForArgument);
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}
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},
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$argument->value
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);
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}
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return $argumentSet;
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}
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/**
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* @param mixed $value The client given value
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* @return mixed The transformed value
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*/
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protected function transform($value, Collection $directivesForArgument)
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{
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foreach ($directivesForArgument as $directive) {
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$value = $this->applyDirective($directive, $value);
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}
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return $value;
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}
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/**
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* @param mixed $value The client given value
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* @return mixed The transformed value
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*/
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abstract protected function applyDirective(Directive $directive, $value);
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}
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spawnia