@graphql-tools/utils/cjs/addTypes.js

Common package containing utils and types for GraphQL tools

"use strict";
// addTypes uses toConfig to create a new schema with a new or replaced
// type or directive. Rewiring is employed so that the replaced type can be
// reconnected with the existing types.
//
// Rewiring is employed even for new types or directives as a convenience, so
// that type references within the new type or directive do not have to be to
// the identical objects within the original schema.
//
// In fact, the type references could even be stub types with entirely different
// fields, as long as the type references share the same name as the desired
// type within the original schema's type map.
//
// This makes it easy to perform simple schema operations (e.g. adding a new
// type with a fiew fields removed from an existing type) that could normally be
// performed by using toConfig directly, but is blocked if any intervening
// more advanced schema operations have caused the types to be recreated via
// rewiring.
//
// Type recreation happens, for example, with every use of mapSchema, as the
// types are always rewired. If fields are selected and removed using
// mapSchema, adding those fields to a new type can no longer be simply done
// by toConfig, as the types are not the identical JavaScript objects, and
// schema creation will fail with errors referencing multiple types with the
// same names.
//
// enhanceSchema can fill this gap by adding an additional round of rewiring.
//
Object.defineProperty(exports, "__esModule", { value: true });
exports.addTypes = addTypes;
const graphql_1 = require("graphql");
const getObjectTypeFromTypeMap_js_1 = require("./getObjectTypeFromTypeMap.js");
const rewire_js_1 = require("./rewire.js");
function addTypes(schema, newTypesOrDirectives) {
    const config = schema.toConfig();
    const originalTypeMap = {};
    for (const type of config.types) {
        originalTypeMap[type.name] = type;
    }
    const originalDirectiveMap = {};
    for (const directive of config.directives) {
        originalDirectiveMap[directive.name] = directive;
    }
    for (const newTypeOrDirective of newTypesOrDirectives) {
        if ((0, graphql_1.isNamedType)(newTypeOrDirective)) {
            originalTypeMap[newTypeOrDirective.name] = newTypeOrDirective;
        }
        else if ((0, graphql_1.isDirective)(newTypeOrDirective)) {
            originalDirectiveMap[newTypeOrDirective.name] = newTypeOrDirective;
        }
    }
    const { typeMap, directives } = (0, rewire_js_1.rewireTypes)(originalTypeMap, Object.values(originalDirectiveMap));
    return new graphql_1.GraphQLSchema({
        ...config,
        query: (0, getObjectTypeFromTypeMap_js_1.getObjectTypeFromTypeMap)(typeMap, schema.getQueryType()),
        mutation: (0, getObjectTypeFromTypeMap_js_1.getObjectTypeFromTypeMap)(typeMap, schema.getMutationType()),
        subscription: (0, getObjectTypeFromTypeMap_js_1.getObjectTypeFromTypeMap)(typeMap, schema.getSubscriptionType()),
        types: Object.values(typeMap),
        directives,
    });
}