@theguild/federation-composition/esm/subgraph/validation/rules/elements/interface-object.js

Open Source Composition library for Apollo Federation

import { GraphQLError, Kind } from "graphql";
import { validateDirectiveAgainstOriginal } from "../../../helpers.js";
export function InterfaceObjectRules(context) {
    return {
        DirectiveDefinition(node) {
            validateDirectiveAgainstOriginal(node, "interfaceObject", context);
        },
        Directive(node) {
            if (!context.isAvailableFederationDirective("interfaceObject", node)) {
                return;
            }
            if (context.satisfiesVersionRange("< v2.3")) {
                context.reportError(new GraphQLError(`@interfaceObject is not yet supported. See https://github.com/graphql-hive/federation-composition/issues/7`, {
                    extensions: { code: "UNSUPPORTED_FEATURE" },
                }));
                return;
            }
            const typeDef = context.typeNodeInfo.getTypeDef();
            if (!typeDef) {
                return;
            }
            if (typeDef.kind !== Kind.OBJECT_TYPE_DEFINITION &&
                typeDef.kind !== Kind.OBJECT_TYPE_EXTENSION) {
                return;
            }
            if (!typeDef.directives?.some((d) => d.name.value === "key")) {
                context.reportError(new GraphQLError(`The @interfaceObject directive can only be applied to entity types but type "${typeDef.name.value}" has no @key in this subgraph.`, {
                    extensions: { code: "INTERFACE_OBJECT_USAGE_ERROR" },
                }));
            }
        },
    };
}