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/*
This file is part of GNU Taler
(C) 2021 Taler Systems S.A.
GNU Taler is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
GNU Taler 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 General Public License for more details.
You should have received a copy of the GNU General Public License along with
GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
*
* @author Sebastian Javier Marchano (sebasjm)
*/
import { useState } from "preact/hooks";
import { cancelPendingRequest } from "./backend.js";
export interface Options {
slowTolerance: number,
}
export interface AsyncOperationApi<T> {
request: (...a: any) => void,
cancel: () => void,
data: T | undefined,
isSlow: boolean,
isLoading: boolean,
error: string | undefined
}
export function useAsync<T>(fn?: (...args: any) => Promise<T>, { slowTolerance: tooLong }: Options = { slowTolerance: 1000 }): AsyncOperationApi<T> {
const [data, setData] = useState<T | undefined>(undefined);
const [isLoading, setLoading] = useState<boolean>(false);
const [error, setError] = useState<any>(undefined);
const [isSlow, setSlow] = useState(false)
const request = async (...args: any) => {
if (!fn) return;
setLoading(true);
const handler = setTimeout(() => {
setSlow(true)
}, tooLong)
try {
const result = await fn(...args);
setData(result);
} catch (error) {
setError(error);
}
setLoading(false);
setSlow(false)
clearTimeout(handler)
};
function cancel() {
cancelPendingRequest()
setLoading(false);
setSlow(false)
}
return {
request,
cancel,
data,
isSlow,
isLoading,
error
};
}
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