Kilian Hofmann
88 lines
2.7 KiB
PHP
88 lines
2.7 KiB
PHP
<?php
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namespace Nuwave\Lighthouse\Schema\Directives;
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use Closure;
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use Illuminate\Support\Arr;
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use GraphQL\Type\Definition\ResolveInfo;
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use Nuwave\Lighthouse\Schema\Values\FieldValue;
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use Nuwave\Lighthouse\Exceptions\DirectiveException;
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use Nuwave\Lighthouse\Support\Contracts\GraphQLContext;
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use Nuwave\Lighthouse\Support\Contracts\FieldMiddleware;
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use Nuwave\Lighthouse\Support\Contracts\DefinedDirective;
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class InjectDirective extends BaseDirective implements FieldMiddleware, DefinedDirective
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{
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/**
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* Name of the directive.
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*
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* @return string
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*/
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public function name(): string
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{
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return 'inject';
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}
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public static function definition(): string
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{
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return /* @lang GraphQL */ <<<'SDL'
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directive @inject(
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"""
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A path to the property of the context that will be injected.
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If the value is nested within the context, you may use dot notation
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to get it, e.g. "user.id".
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"""
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context: String!
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"""
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The target name of the argument into which the value is injected.
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You can use dot notation to set the value at arbitrary depth
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within the incoming argument.
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"""
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name: String!
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) on ARGUMENT_DEFINITION | INPUT_FIELD_DEFINITION
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SDL;
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}
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/**
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* Resolve the field directive.
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*
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* @param \Nuwave\Lighthouse\Schema\Values\FieldValue $fieldValue
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* @param \Closure $next
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* @return \Nuwave\Lighthouse\Schema\Values\FieldValue
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*
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* @throws \Nuwave\Lighthouse\Exceptions\DirectiveException
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*/
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public function handleField(FieldValue $fieldValue, Closure $next): FieldValue
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{
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$contextAttributeName = $this->directiveArgValue('context');
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if (! $contextAttributeName) {
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throw new DirectiveException(
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"The `inject` directive on {$fieldValue->getParentName()} [{$fieldValue->getFieldName()}] must have a `context` argument"
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);
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}
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$argumentName = $this->directiveArgValue('name');
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if (! $argumentName) {
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throw new DirectiveException(
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"The `inject` directive on {$fieldValue->getParentName()} [{$fieldValue->getFieldName()}] must have a `name` argument"
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);
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}
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$previousResolver = $fieldValue->getResolver();
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return $next(
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$fieldValue->setResolver(
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function ($rootValue, array $args, GraphQLContext $context, ResolveInfo $resolveInfo) use ($contextAttributeName, $argumentName, $previousResolver) {
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return $previousResolver(
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$rootValue,
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Arr::add($args, $argumentName, data_get($context, $contextAttributeName)),
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$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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}
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