/**
* Copyright (c) 2000-present Liferay, Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2.1 of the License, or (at your option)
* any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*/
import {useIsMounted} from 'frontend-js-react-web';
import React from 'react';
const {useCallback, useRef} = React;
/**
* Provides a way to load a module on demand.
*
* The returned `load()` function expects an identifying `key` for
* the module and an entry point (ie. path to the module), and returns a
* promise that resolves to the loaded module's default export.
*/
export default function useLoad() {
const modules = useRef(new Map());
const isMounted = useIsMounted();
return useCallback(
(key, entryPoint) => {
if (!modules.current.get(key)) {
modules.current.set(
key,
new Promise((resolve, reject) => {
Liferay.Loader.require(
[entryPoint],
(Plugin) => {
if (isMounted()) {
resolve(Plugin.default);
}
},
(error) => {
if (isMounted()) {
// Reset to allow future retries.
modules.current.delete(key);
reject(error);
}
}
);
})
);
}
return modules.current.get(key);
},
[isMounted]
);
}