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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import { useEffect, useState } from 'react';
import { ReducedState } from './types';
export const useReducedState = <T>(reducedState: ReducedState<T>) => {
const [state, setState] = useState<T>(reducedState.state);
useEffect(() => {
const changeListener = (state: T) => {
setState(state);
};
reducedState.addChangeListener(changeListener);
return () => reducedState.removeChangeListener(changeListener);
}, [reducedState]);
return state;
};