50 lines
1.6 KiB
TypeScript
50 lines
1.6 KiB
TypeScript
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/*
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This file is part of GNU Taler
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(C) 2022 Taler Systems S.A.
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GNU Taler is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
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*/
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import { useLocalStorage } from "@gnu-taler/web-util/lib/index.browser";
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interface Settings {
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currentWithdrawalOperationId: string | undefined;
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}
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const defaultSettings: Settings = {
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currentWithdrawalOperationId: undefined,
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};
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function parse_json_or_undefined<T>(str: string | undefined): T | undefined {
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if (str === undefined) return undefined;
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try {
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return JSON.parse(str);
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} catch {
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return undefined;
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}
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}
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export function useSettings(): [
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Readonly<Settings>,
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<T extends keyof Settings>(key: T, value: Settings[T]) => void,
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] {
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const { value, update } = useLocalStorage("demobank-settings");
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const parsed: Settings = parse_json_or_undefined(value) ?? defaultSettings;
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function updateField<T extends keyof Settings>(k: T, v: Settings[T]) {
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const newValue = { ...parsed, [k]: v };
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const json = JSON.stringify(newValue);
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update(json);
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}
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return [parsed, updateField];
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}
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