@theguild/federation-composition
Version:
Open Source Composition library for Apollo Federation
30 lines (29 loc) • 1.01 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.UniqueTypeNamesRule = void 0;
const graphql_1 = require("graphql");
function UniqueTypeNamesRule(context) {
const knownTypeNames = new Set();
return {
ScalarTypeDefinition: checkTypeName,
ObjectTypeDefinition: checkTypeName,
InterfaceTypeDefinition: checkTypeName,
UnionTypeDefinition: checkTypeName,
EnumTypeDefinition: checkTypeName,
InputObjectTypeDefinition: checkTypeName,
};
function checkTypeName(node) {
const typeName = node.name.value;
if (knownTypeNames.has(typeName)) {
context.reportError(new graphql_1.GraphQLError(`There can be only one type named "${typeName}".`, {
extensions: {
code: 'INVALID_GRAPHQL',
},
}));
}
else {
knownTypeNames.add(typeName);
}
}
}
exports.UniqueTypeNamesRule = UniqueTypeNamesRule;