@graphql-tools/code-file-loader
Version:
A set of utils for faster development of GraphQL tools
70 lines (69 loc) • 2.47 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.pickExportFromModuleSync = exports.pickExportFromModule = void 0;
const graphql_1 = require("graphql");
const helpers_js_1 = require("./helpers.js");
const identifiersToLookFor = ['default', 'schema', 'typeDefs', 'data'];
// Pick exports
/**
* @internal
*/
function pickExportFromModule({ module, filepath }) {
ensureModule({ module, filepath });
return resolveModule(ensureExports({ module, filepath }));
}
exports.pickExportFromModule = pickExportFromModule;
/**
* @internal
*/
function pickExportFromModuleSync({ module, filepath }) {
ensureModule({ module, filepath });
return resolveModuleSync(ensureExports({ module, filepath }));
}
exports.pickExportFromModuleSync = pickExportFromModuleSync;
// module
async function resolveModule(identifiers) {
const exportValue = await (0, helpers_js_1.pick)(await identifiers, identifiersToLookFor);
return resolveExport(exportValue);
}
function resolveModuleSync(identifiers) {
const exportValue = (0, helpers_js_1.pick)(identifiers, identifiersToLookFor);
return resolveExport(exportValue);
}
// validate
function ensureModule({ module, filepath }) {
if (!module) {
throw new Error(`Invalid export from export file ${filepath}: empty export!`);
}
}
function ensureExports({ module, filepath }) {
const identifiers = (0, helpers_js_1.pick)(module, identifiersToLookFor);
if (!identifiers) {
throw new Error(`Invalid export from export file ${filepath}: missing default export or 'schema' export!`);
}
return identifiers;
}
// Decide what to do with an exported value
function resolveExport(fileExport) {
try {
if ((0, graphql_1.isSchema)(fileExport)) {
return fileExport;
}
if ((0, helpers_js_1.isSchemaText)(fileExport)) {
return (0, graphql_1.parse)(fileExport);
}
if ((0, helpers_js_1.isWrappedSchemaJson)(fileExport)) {
return (0, graphql_1.buildClientSchema)(fileExport.data);
}
if ((0, helpers_js_1.isSchemaJson)(fileExport)) {
return (0, graphql_1.buildClientSchema)(fileExport);
}
if ((0, helpers_js_1.isSchemaAst)(fileExport)) {
return fileExport;
}
return null;
}
catch (e) {
throw new Error('Exported schema must be of type GraphQLSchema, text, AST, or introspection JSON.');
}
}