@theguild/federation-composition
Version:
Open Source Composition library for Apollo Federation
34 lines (33 loc) • 1.43 kB
JavaScript
import { GraphQLError, isTypeDefinitionNode, isTypeExtensionNode, isTypeSystemDefinitionNode, isTypeSystemExtensionNode, specifiedScalarTypes, } from "graphql";
function isTypeDefinitionOrExtensionNode(node) {
return isTypeDefinitionNode(node) || isTypeExtensionNode(node);
}
export function KnownTypeNamesRule(context) {
const { definitions } = context.getDocument();
const typeNames = new Set(definitions
.filter(isTypeDefinitionOrExtensionNode)
.map((def) => def.name.value));
return {
NamedType(node, _1, parent, _2, ancestors) {
const typeName = node.name.value;
if (!typeNames.has(typeName)) {
const definitionNode = ancestors[2] ?? parent;
const isSDL = definitionNode != null && isSDLNode(definitionNode);
if (isSDL && standardTypeNames.has(typeName)) {
return;
}
context.reportError(new GraphQLError(`Unknown type ${typeName}`, {
nodes: node,
extensions: {
code: "INVALID_GRAPHQL",
},
}));
}
},
};
}
const standardTypeNames = new Set([...specifiedScalarTypes].map((type) => type.name));
function isSDLNode(value) {
return ("kind" in value &&
(isTypeSystemDefinitionNode(value) || isTypeSystemExtensionNode(value)));
}