wallet-core/packages/merchant-backoffice-ui/src/hooks/notifications.ts

/*
 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.js";

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 }
}