36 lines
1.2 KiB
JavaScript
36 lines
1.2 KiB
JavaScript
import { GraphQLError } from '../../error/GraphQLError';
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export function duplicateDirectiveNameMessage(directiveName) {
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return "There can be only one directive named \"".concat(directiveName, "\".");
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}
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export function existedDirectiveNameMessage(directiveName) {
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return "Directive \"".concat(directiveName, "\" already exists in the schema. It cannot be redefined.");
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}
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/**
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* Unique directive names
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*
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* A GraphQL document is only valid if all defined directives have unique names.
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*/
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export function UniqueDirectiveNames(context) {
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var knownDirectiveNames = Object.create(null);
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var schema = context.getSchema();
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return {
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DirectiveDefinition: function DirectiveDefinition(node) {
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var directiveName = node.name.value;
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if (schema && schema.getDirective(directiveName)) {
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context.reportError(new GraphQLError(existedDirectiveNameMessage(directiveName), node.name));
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return;
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}
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if (knownDirectiveNames[directiveName]) {
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context.reportError(new GraphQLError(duplicateDirectiveNameMessage(directiveName), [knownDirectiveNames[directiveName], node.name]));
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} else {
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knownDirectiveNames[directiveName] = node.name;
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}
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return false;
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}
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};
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}
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