55 lines
1.3 KiB
JavaScript
55 lines
1.3 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, '__esModule', {
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value: true,
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});
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exports.UniqueDirectiveNamesRule = UniqueDirectiveNamesRule;
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var _GraphQLError = require('../../error/GraphQLError.js');
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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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function UniqueDirectiveNamesRule(context) {
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const knownDirectiveNames = Object.create(null);
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const schema = context.getSchema();
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return {
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DirectiveDefinition(node) {
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const directiveName = node.name.value;
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if (
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schema !== null &&
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schema !== void 0 &&
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schema.getDirective(directiveName)
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) {
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context.reportError(
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new _GraphQLError.GraphQLError(
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`Directive "@${directiveName}" already exists in the schema. It cannot be redefined.`,
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{
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nodes: node.name,
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},
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),
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);
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return;
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}
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if (knownDirectiveNames[directiveName]) {
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context.reportError(
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new _GraphQLError.GraphQLError(
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`There can be only one directive named "@${directiveName}".`,
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{
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nodes: [knownDirectiveNames[directiveName], node.name],
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},
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),
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);
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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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