/*
 * Copyright (C) 2021  Aravinth Manivannan <realaravinth@batsense.net>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
import isNumber from "../../../../../utils/isNumber";

const validateDuration = (): number => {
  const duartionElement = <HTMLInputElement>document.getElementById("duration");
  const duration = parseInt(duartionElement.value);
  if (!isNumber(duration) || Number.isNaN(duration)) {
    throw new Error("duration can contain nubers only");
  }

  if (duration <= 0) {
    throw new Error("duration must be greater than zero");
  }
  return duration;
};

export default validateDuration;