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/*
This file is part of TALER
(C) 2016 GNUnet e.V.
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.
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
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
import {
NotificationType, TalerErrorDetail
} from "@gnu-taler/taler-util";
import { TalerError } from "@gnu-taler/taler-wallet-core";
import { useEffect, useMemo, useState } from "preact/hooks";
import * as wxApi from "../wxApi.js";
export interface HookOk<T> {
hasError: false;
response: T;
}
export type HookError = HookGenericError | HookOperationalError;
export interface HookGenericError {
hasError: true;
operational: false;
message: string;
}
export interface HookOperationalError {
hasError: true;
operational: true;
details: TalerErrorDetail;
}
interface WithRetry {
retry: () => void;
}
export type HookResponse<T> = HookOk<T> | HookError | undefined;
export type HookResponseWithRetry<T> = ((HookOk<T> | HookError) & WithRetry) | undefined;
export function useAsyncAsHook<T>(
fn: () => Promise<T | false>,
updateOnNotification?: Array<NotificationType>,
deps?: any[],
): HookResponse<T> {
const args = useMemo(() => ({
fn, updateOnNotification
// eslint-disable-next-line react-hooks/exhaustive-deps
}), deps || [])
const [result, setHookResponse] = useState<HookResponse<T>>(undefined);
useEffect(() => {
async function doAsync(): Promise<void> {
try {
const response = await args.fn();
if (response === false) return;
setHookResponse({ hasError: false, response });
} catch (e) {
if (e instanceof TalerError) {
setHookResponse({
hasError: true,
operational: true,
details: e.errorDetail,
});
} else if (e instanceof Error) {
setHookResponse({
hasError: true,
operational: false,
message: e.message,
});
}
}
}
doAsync();
if (args.updateOnNotification && args.updateOnNotification.length > 0) {
return wxApi.onUpdateNotification(args.updateOnNotification, () => {
doAsync();
});
}
}, [args]);
return result;
}
export function useAsyncAsHook2<T>(
fn: () => Promise<T | false>,
deps?: any[],
): HookResponseWithRetry<T> {
const [result, setHookResponse] = useState<HookResponse<T>>(undefined);
const args = useMemo(() => ({
fn
// eslint-disable-next-line react-hooks/exhaustive-deps
}), deps || [])
async function doAsync(): Promise<void> {
try {
const response = await args.fn();
if (response === false) return;
setHookResponse({ hasError: false, response });
} catch (e) {
if (e instanceof TalerError) {
setHookResponse({
hasError: true,
operational: true,
details: e.errorDetail,
});
} else if (e instanceof Error) {
setHookResponse({
hasError: true,
operational: false,
message: e.message,
});
}
}
}
useEffect(() => {
doAsync();
}, [args]);
if (!result) return undefined;
return { ...result, retry: doAsync };
}
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