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David Lechner
9641898a75
The pattern we were using for actions required actions to be defined in three places, an enum member containing the type string, an type definition and a function. This combines all three of these into one by using a helper function based on the ideas from [1]. [1]: https://phryneas.de/redux-typescript-no-discriminating-union
32 lines
748 B
TypeScript
32 lines
748 B
TypeScript
// SPDX-License-Identifier: MIT
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// Copyright (c) 2021-2022 The Pybricks Authors
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import { Reducer, combineReducers } from 'redux';
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import { didFailToFinish, didFinish, didProgress, didStart } from './actions';
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const flashing: Reducer<boolean> = (state = false, action) => {
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if (didStart.matches(action)) {
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return true;
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}
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if (didFinish.matches(action) || didFailToFinish.matches(action)) {
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return false;
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}
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return state;
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};
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const progress: Reducer<number | null> = (state = null, action) => {
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if (didStart.matches(action)) {
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return null;
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}
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if (didProgress.matches(action)) {
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return action.value;
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}
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return state;
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};
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export default combineReducers({ flashing, progress });
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