44 lines
1.4 KiB
PHP
44 lines
1.4 KiB
PHP
<?php
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namespace GraphQL\Validator\Rules;
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use GraphQL\Error\Error;
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use GraphQL\Language\AST\ArgumentNode;
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use GraphQL\Language\AST\FragmentDefinitionNode;
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use GraphQL\Language\AST\Node;
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use GraphQL\Language\AST\NodeKind;
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use GraphQL\Language\Visitor;
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use GraphQL\Validator\ValidationContext;
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class UniqueFragmentNames extends AbstractValidationRule
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{
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static function duplicateFragmentNameMessage($fragName)
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{
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return "There can be only one fragment named \"$fragName\".";
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}
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public $knownFragmentNames;
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public function getVisitor(ValidationContext $context)
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{
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$this->knownFragmentNames = [];
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return [
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NodeKind::OPERATION_DEFINITION => function () {
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return Visitor::skipNode();
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},
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NodeKind::FRAGMENT_DEFINITION => function (FragmentDefinitionNode $node) use ($context) {
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$fragmentName = $node->name->value;
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if (!empty($this->knownFragmentNames[$fragmentName])) {
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$context->reportError(new Error(
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self::duplicateFragmentNameMessage($fragmentName),
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[ $this->knownFragmentNames[$fragmentName], $node->name ]
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));
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} else {
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$this->knownFragmentNames[$fragmentName] = $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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}
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