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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\SelectionSetNode; |
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use Digia\GraphQL\Validation\Conflict\FindsConflictsTrait; |
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use Digia\GraphQL\Validation\Conflict\Map; |
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use Digia\GraphQL\Validation\Conflict\PairSet; |
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use function Digia\GraphQL\Validation\fieldsConflictMessage; |
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/** |
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* Overlapping fields can be merged |
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* |
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* A selection set is only valid if all fields (including spreading any |
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* fragments) either correspond to distinct response names or can be merged |
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* without ambiguity. |
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*/ |
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class OverlappingFieldsCanBeMergedRule extends AbstractRule |
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{ |
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use FindsConflictsTrait; |
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/** |
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* OverlappingFieldsCanBeMergedRule constructor. |
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*/ |
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public function __construct() |
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{ |
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$this->cachedFieldsAndFragmentNames = new Map(); |
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$this->comparedFragmentPairs = new PairSet(); |
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} |
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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 SelectionSetNode) { |
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$parentType = $this->validationContext->getParentType(); |
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$conflicts = $this->findConflictsWithinSelectionSet( |
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$this->cachedFieldsAndFragmentNames, |
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$this->comparedFragmentPairs, |
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$node, |
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$parentType |
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); |
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foreach ($conflicts as $conflict) { |
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$this->validationContext->reportError( |
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new ValidationException( |
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fieldsConflictMessage($conflict->getResponseName(), $conflict->getReason()), |
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$conflict->getAllFields() |
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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
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