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<?php |
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namespace Digia\GraphQL\Validation\Rule; |
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use Digia\GraphQL\Error\ValidationException; |
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use Digia\GraphQL\Language\Node\NodeInterface; |
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use Digia\GraphQL\Language\Node\OperationDefinitionNode; |
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use Digia\GraphQL\Language\Node\VariableDefinitionNode; |
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use Digia\GraphQL\Language\Node\VariableNode; |
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use function Digia\GraphQL\Validation\unusedVariableMessage; |
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/** |
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* No unused variables |
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* |
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* A GraphQL operation is only valid if all variables defined by an operation |
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* are used, either directly or within a spread fragment. |
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*/ |
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class NoUnusedVariablesRule extends AbstractRule |
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{ |
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/** |
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* @var array|VariableDefinitionNode[] |
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*/ |
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protected $variableDefinitions; |
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/** |
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* @inheritdoc |
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*/ |
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public function enterNode(NodeInterface $node): ?NodeInterface |
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{ |
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if ($node instanceof OperationDefinitionNode) { |
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$this->variableDefinitions = []; |
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} |
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if ($node instanceof VariableDefinitionNode) { |
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$this->variableDefinitions[] = $node; |
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} |
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return $node; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function leaveNode(NodeInterface $node): ?NodeInterface |
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{ |
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if ($node instanceof OperationDefinitionNode) { |
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$variableNamesUsed = []; |
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$usages = $this->validationContext->getRecursiveVariableUsages($node); |
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$operationNameNode = $node->getName(); |
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$operationName = null !== $operationNameNode ? $operationNameNode->getValue() : null; |
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/** @var VariableNode $variableNode */ |
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foreach ($usages as ['node' => $variableNode]) { |
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$variableNamesUsed[$variableNode->getNameValue()] = true; |
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} |
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foreach ($this->variableDefinitions as $variableDefinition) { |
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$variableName = $variableDefinition->getVariable()->getNameValue(); |
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if (!isset($variableNamesUsed[$variableName])) { |
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$this->validationContext->reportError( |
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new ValidationException( |
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unusedVariableMessage($variableName, $operationName), |
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[$variableDefinition] |
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) |
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); |
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} |
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} |
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} |
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return $node; |
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} |
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} |
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digiaonline /
graphql-php
