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Diffstat (limited to 'packages/taler-wallet-webextension/src/hooks/useAsyncAsHook.ts')
-rw-r--r-- | packages/taler-wallet-webextension/src/hooks/useAsyncAsHook.ts | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/packages/taler-wallet-webextension/src/hooks/useAsyncAsHook.ts b/packages/taler-wallet-webextension/src/hooks/useAsyncAsHook.ts new file mode 100644 index 000000000..2131d45cb --- /dev/null +++ b/packages/taler-wallet-webextension/src/hooks/useAsyncAsHook.ts @@ -0,0 +1,48 @@ +/* + 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 { ExchangesListRespose } from "@gnu-taler/taler-util"; +import { useEffect, useState } from "preact/hooks"; +import * as wxApi from "../wxApi"; + +interface HookOk<T> { + hasError: false; + response: T; +} + +interface HookError { + hasError: true; + message: string; +} + +export type HookResponse<T> = HookOk<T> | HookError | undefined; + +export function useAsyncAsHook<T> (fn: (() => Promise<T>)): HookResponse<T> { + const [result, setHookResponse] = useState<HookResponse<T>>(undefined); + useEffect(() => { + async function doAsync() { + try { + const response = await fn(); + setHookResponse({ hasError: false, response }); + } catch (e) { + if (e instanceof Error) { + setHookResponse({ hasError: true, message: e.message }); + } + } + } + doAsync() + }, []); + return result; +} |