1 files changed, 48 insertions, 0 deletions
diff --git a/packages/merchant-backoffice-ui/src/hooks/notifications.ts b/packages/merchant-backoffice-ui/src/hooks/notifications.ts
new file mode 100644
index 000000000..1c0c37308
--- /dev/null
+++ b/packages/merchant-backoffice-ui/src/hooks/notifications.ts
@@ -0,0 +1,48 @@
+/*
+ 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 { Notification } from '../utils/types';
+
+interface Result {
+  notifications: Notification[];
+  pushNotification: (n: Notification) => void;
+  removeNotification: (n: Notification) => void;
+}
+
+type NotificationWithDate = Notification & { since: Date }
+
+export function useNotifications(initial: Notification[] = [], timeout = 3000): Result {
+  const [notifications, setNotifications] = useState<(NotificationWithDate)[]>(initial.map(i => ({...i, since: new Date() })))
+
+  const pushNotification = (n: Notification): void => {
+    const entry = { ...n, since: new Date() }
+    setNotifications(ns => [...ns, entry])
+    if (n.type !== 'ERROR') setTimeout(() => {
+      setNotifications(ns => ns.filter(x => x.since !== entry.since))
+    }, timeout)
+  }
+
+  const removeNotification = (notif: Notification) => {
+    setNotifications((ns: NotificationWithDate[]) => ns.filter(n => n !== notif))
+  }
+  return { notifications, pushNotification, removeNotification }
+}