29 lines
788 B
TypeScript
29 lines
788 B
TypeScript
import { useReducer } from 'react';
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type State<T> =
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| { value: T; error: undefined }
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| { value: false; error: Error }
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| { value: undefined; error: undefined };
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type Action<T> =
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| { type: 'RESOLVE'; value: T }
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| { type: 'REJECT'; error: Error }
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| { type: 'RESET' };
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function reducer<T>(state: State<T>, action: Action<T>): State<T> {
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switch (action.type) {
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case 'RESOLVE':
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return { value: action.value, error: undefined };
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case 'REJECT':
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return { value: false, error: action.error };
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case 'RESET':
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return { value: undefined, error: undefined };
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default:
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return state;
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}
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}
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export default function useResolver<T>(): [State<T>, React.Dispatch<Action<T>>] {
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return useReducer(reducer<T>, { value: undefined, error: undefined });
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}
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