@theguild/federation-composition/esm/subgraph/validation/rules/elements/field-set.js

Open Source Composition library for Apollo Federation

import { GraphQLError } from 'graphql';
export function FieldSetRules(context) {
    function validateFieldSet(node, receivedType) {
        if (node.name.value === 'FieldSet' && context.isAvailableFederationType('FieldSet')) {
            context.reportError(new GraphQLError(`Invalid definition for type FieldSet: FieldSet should be a ScalarType but is defined as a ${receivedType}`, {
                nodes: node,
                extensions: { code: 'TYPE_DEFINITION_INVALID' },
            }));
        }
    }
    return {
        ScalarTypeDefinition(node) {
            if (node.name.value === 'FieldSet' && context.isAvailableFederationType('FieldSet')) {
                context.markAsFederationDefinitionReplacement('FieldSet');
            }
        },
        ObjectTypeDefinition(node) {
            validateFieldSet(node, 'ObjectType');
        },
        InterfaceTypeDefinition(node) {
            validateFieldSet(node, 'InterfaceType');
        },
        UnionTypeDefinition(node) {
            validateFieldSet(node, 'UnionType');
        },
        EnumTypeDefinition(node) {
            validateFieldSet(node, 'EnumType');
        },
        InputObjectTypeDefinition(node) {
            validateFieldSet(node, 'InputObjectType');
        },
    };
}