74 lines
2.2 KiB
PHP
74 lines
2.2 KiB
PHP
<?php
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declare(strict_types=1);
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namespace GraphQL\Validator\Rules;
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use GraphQL\Error\Error;
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use GraphQL\Language\AST\NameNode;
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use GraphQL\Language\AST\NodeKind;
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use GraphQL\Language\AST\ObjectFieldNode;
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use GraphQL\Language\Visitor;
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use GraphQL\Language\VisitorOperation;
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use GraphQL\Validator\ASTValidationContext;
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use GraphQL\Validator\SDLValidationContext;
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use GraphQL\Validator\ValidationContext;
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use function array_pop;
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use function sprintf;
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class UniqueInputFieldNames extends ValidationRule
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{
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/** @var array<string, NameNode> */
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public $knownNames;
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/** @var array<array<string, NameNode>> */
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public $knownNameStack;
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public function getVisitor(ValidationContext $context)
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{
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return $this->getASTVisitor($context);
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}
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public function getSDLVisitor(SDLValidationContext $context)
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{
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return $this->getASTVisitor($context);
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}
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public function getASTVisitor(ASTValidationContext $context)
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{
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$this->knownNames = [];
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$this->knownNameStack = [];
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return [
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NodeKind::OBJECT => [
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'enter' => function () : void {
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$this->knownNameStack[] = $this->knownNames;
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$this->knownNames = [];
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},
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'leave' => function () : void {
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$this->knownNames = array_pop($this->knownNameStack);
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},
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],
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NodeKind::OBJECT_FIELD => function (ObjectFieldNode $node) use ($context) : VisitorOperation {
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$fieldName = $node->name->value;
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if (isset($this->knownNames[$fieldName])) {
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$context->reportError(new Error(
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self::duplicateInputFieldMessage($fieldName),
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[$this->knownNames[$fieldName], $node->name]
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));
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} else {
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$this->knownNames[$fieldName] = $node->name;
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}
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return Visitor::skipNode();
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},
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];
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}
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public static function duplicateInputFieldMessage($fieldName)
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{
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return sprintf('There can be only one input field named "%s".', $fieldName);
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}
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}
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