// Copyright (c) Microsoft Corporation. All rights reserved.

// Licensed under the MIT License.

'use strict';

const path = require('path');

const constants = require('../../constants');

const nodeFetchIndexFile = path.join(

constants.ExtensionRootDir,

'node_modules',

'@jupyterlab',

'services',

'node_modules',

'node-fetch',

'lib',

'index.js'

);

// On windows replace `\` with `\\`, else we get an error in webpack (Module parse failed: Octal literal in strict mode).

const nodeFetchFile = constants.isWindows ? nodeFetchIndexFile.replace(/\\/g, '\\\\') : nodeFetchIndexFile;

/**

* Node fetch has an es6 module file. That gets bundled into @jupyterlab/services.

* However @jupyterlab/services/serverconnection.js is written such that it uses fetch from either node or browser.

* We need to force the browser version for things to work correctly.

*

* @export

* @param {string} source

* @returns

*/

exports.default = function (source) {

if (source.indexOf("require('node-fetch')") > 0) {

source = source.replace(/require\('node-fetch'\)/g, `require('${nodeFetchFile}')`);

}

return source;

};