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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x | /**
* useAsync — async loader with status tracking.
*/
import {useEffect, useRef, useState, type DependencyList} from 'react';
import type {IBlongError} from '../types/action.js';
export type AsyncStatus = 'idle' | 'loading' | 'success' | 'error';
export interface IUseAsyncResult<T> {
status: AsyncStatus;
data?: T;
error?: IBlongError | Error;
loading: boolean;
reload: () => void;
}
export function useAsync<T>(
asyncFn: () => Promise<T>,
deps: DependencyList = [],
): IUseAsyncResult<T> {
const [status, setStatus] = useState<AsyncStatus>('idle');
const [data, setData] = useState<T | undefined>();
const [error, setError] = useState<IBlongError | Error | undefined>();
const [reloadKey, setReloadKey] = useState(0);
const asyncFnRef = useRef(asyncFn);
asyncFnRef.current = asyncFn;
useEffect(() => {
let cancelled = false;
// eslint-disable-next-line @eslint-react/set-state-in-effect
setStatus('loading');
// eslint-disable-next-line @eslint-react/set-state-in-effect
setError(undefined);
asyncFnRef
.current()
.then(result => {
if (!cancelled) {
setData(result);
setStatus('success');
}
})
.catch(err => {
if (!cancelled) {
setError(err as IBlongError | Error);
setStatus('error');
}
});
return () => {
cancelled = true;
};
// eslint-disable-next-line @eslint-react/exhaustive-deps -- spread deps from caller are intentional
}, [...deps, reloadKey]);
return {
status,
data,
error,
loading: status === 'loading' || status === 'idle',
reload: () => setReloadKey(k => k + 1),
};
}
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