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Edit File: UniqueEnumValueNames.php
<?php declare(strict_types=1); namespace Automattic\WooCommerce\Vendor\GraphQL\Validator\Rules; use Automattic\WooCommerce\Vendor\GraphQL\Error\Error; use Automattic\WooCommerce\Vendor\GraphQL\Language\AST\EnumTypeDefinitionNode; use Automattic\WooCommerce\Vendor\GraphQL\Language\AST\EnumTypeExtensionNode; use Automattic\WooCommerce\Vendor\GraphQL\Language\AST\EnumValueNode; use Automattic\WooCommerce\Vendor\GraphQL\Language\AST\NodeKind; use Automattic\WooCommerce\Vendor\GraphQL\Language\Visitor; use Automattic\WooCommerce\Vendor\GraphQL\Language\VisitorOperation; use Automattic\WooCommerce\Vendor\GraphQL\Type\Definition\EnumType; use Automattic\WooCommerce\Vendor\GraphQL\Validator\SDLValidationContext; class UniqueEnumValueNames extends ValidationRule { public function getSDLVisitor(SDLValidationContext $context): array { /** @var array<string, array<string, EnumValueNode>> $knownValueNames */ $knownValueNames = []; /** * @param EnumTypeDefinitionNode|EnumTypeExtensionNode $enum */ $checkValueUniqueness = static function ($enum) use ($context, &$knownValueNames): VisitorOperation { $typeName = $enum->name->value; $schema = $context->getSchema(); $existingType = $schema !== null ? $schema->getType($typeName) : null; $valueNodes = $enum->values; if (! isset($knownValueNames[$typeName])) { $knownValueNames[$typeName] = []; } $valueNames = &$knownValueNames[$typeName]; foreach ($valueNodes as $valueDef) { $valueNameNode = $valueDef->name; $valueName = $valueNameNode->value; if ($existingType instanceof EnumType && $existingType->getValue($valueName) !== null) { $context->reportError(new Error( "Enum value \"{$typeName}.{$valueName}\" already exists in the schema. It cannot also be defined in this type extension.", $valueNameNode )); } elseif (isset($valueNames[$valueName])) { $context->reportError(new Error( "Enum value \"{$typeName}.{$valueName}\" can only be defined once.", [$valueNames[$valueName], $valueNameNode] )); } else { $valueNames[$valueName] = $valueNameNode; } } return Visitor::skipNode(); }; return [ NodeKind::ENUM_TYPE_DEFINITION => $checkValueUniqueness, NodeKind::ENUM_TYPE_EXTENSION => $checkValueUniqueness, ]; } }