1 files changed, 59 insertions, 0 deletions
diff --git a/packages/merchant-backoffice-ui/src/hooks/useSettings.ts b/packages/merchant-backoffice-ui/src/hooks/useSettings.ts
new file mode 100644
index 000000000..5c0932f27
--- /dev/null
+++ b/packages/merchant-backoffice-ui/src/hooks/useSettings.ts
@@ -0,0 +1,59 @@
+/*
+ This file is part of GNU Taler
+ (C) 2022 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/>
+ */
+
+import { buildStorageKey, useLocalStorage } from "@gnu-taler/web-util/browser";
+import {
+  Codec,
+  buildCodecForObject,
+  codecForBoolean,
+} from "@gnu-taler/taler-util";
+
+function parse_json_or_undefined<T>(str: string | undefined): T | undefined {
+  if (str === undefined) return undefined;
+  try {
+    return JSON.parse(str);
+  } catch {
+    return undefined;
+  }
+}
+
+export interface Settings {
+  advanceOrderMode: boolean
+}
+
+const defaultSettings: Settings = {
+  advanceOrderMode: false,
+}
+
+export const codecForSettings = (): Codec<Settings> =>
+  buildCodecForObject<Settings>()
+    .property("advanceOrderMode", codecForBoolean())
+    .build("Settings");
+
+const SETTINGS_KEY = buildStorageKey("merchant-settings", codecForSettings());
+
+export function useSettings(): [
+  Readonly<Settings>,
+  <T extends keyof Settings>(key: T, value: Settings[T]) => void,
+] {
+  const { value, update } = useLocalStorage(SETTINGS_KEY);
+
+  const parsed: Settings = value ?? defaultSettings;
+  function updateField<T extends keyof Settings>(k: T, v: Settings[T]) {
+    update({ ...parsed, [k]: v });
+  }
+  return [parsed, updateField];
+}