| 'use strict'; |
| |
| Object.defineProperty(exports, '__esModule', { |
| value: true, |
| }); |
| exports.getOperationAST = getOperationAST; |
| |
| var _kinds = require('../language/kinds.js'); |
| |
| /** @category Operations */ |
| |
| /** |
| * Returns an operation AST given a document AST and optionally an operation |
| * name. If a name is not provided, an operation is only returned if only one is |
| * provided in the document. |
| * @param documentAST - The parsed GraphQL document AST. |
| * @param operationName - The optional operation name to select. |
| * @returns The resolved operation ast. |
| * @example |
| * ```ts |
| * import { parse } from 'graphql/language'; |
| * import { getOperationAST } from 'graphql/utilities'; |
| * |
| * const document = parse('query GetName { name }'); |
| * const operation = getOperationAST(document, 'GetName'); |
| * |
| * operation.name.value; // => 'GetName' |
| * getOperationAST(document, 'Missing'); // => undefined |
| * ``` |
| */ |
| function getOperationAST(documentAST, operationName) { |
| let operation = null; |
| |
| for (const definition of documentAST.definitions) { |
| if (definition.kind === _kinds.Kind.OPERATION_DEFINITION) { |
| var _definition$name; |
| |
| if (operationName == null) { |
| // If no operation name was provided, only return an Operation if there |
| // is one defined in the document. Upon encountering the second, return |
| // null. |
| if (operation) { |
| return null; |
| } |
| |
| operation = definition; |
| } else if ( |
| ((_definition$name = definition.name) === null || |
| _definition$name === void 0 |
| ? void 0 |
| : _definition$name.value) === operationName |
| ) { |
| return definition; |
| } |
| } |
| } |
| |
| return operation; |
| } |