@theguild/federation-composition
Version:
Open Source Composition library for Apollo Federation
42 lines (41 loc) • 1.74 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.UniqueArgumentDefinitionNamesRule = UniqueArgumentDefinitionNamesRule;
const graphql_1 = require("graphql");
function UniqueArgumentDefinitionNamesRule(context) {
return {
DirectiveDefinition(directiveNode) {
const argumentNodes = directiveNode.arguments ?? [];
return checkArgUniqueness(`@${directiveNode.name.value}`, argumentNodes);
},
InterfaceTypeDefinition: checkArgUniquenessPerField,
InterfaceTypeExtension: checkArgUniquenessPerField,
ObjectTypeDefinition: checkArgUniquenessPerField,
ObjectTypeExtension: checkArgUniquenessPerField,
};
function checkArgUniquenessPerField(typeNode) {
const typeName = typeNode.name.value;
const fieldNodes = typeNode.fields ?? [];
for (const fieldDef of fieldNodes) {
const fieldName = fieldDef.name.value;
const argumentNodes = fieldDef.arguments ?? [];
checkArgUniqueness(`${typeName}.${fieldName}`, argumentNodes);
}
return false;
}
function checkArgUniqueness(parentName, argumentNodes) {
const visitedArgumentNames = new Set();
for (const argDef of argumentNodes) {
if (visitedArgumentNames.has(argDef.name.value)) {
context.reportError(new graphql_1.GraphQLError(`Argument "${parentName}(${argDef.name.value}:)" can only be defined once.`, {
extensions: {
code: 'INVALID_GRAPHQL',
},
}));
}
else {
visitedArgumentNames.add(argDef.name.value);
}
}
}
}