//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
//Copyright (C) 2024 HTWKalender support@htwkalender.de

//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/>.

const tokenRegex = /^[a-z0-9]{15}$/;
const tokenUriRegex = /[?&]token=([a-z0-9]{15})(?:&|$)/;

export const isToken = (token: string): boolean => {
  return tokenRegex.test(token) || tokenUriRegex.test(token);
};

export function extractToken(token: string): string {
  if (tokenRegex.test(token)) {
    return token;
  }

  const match = tokenUriRegex.exec(token);
  if (match) {
    return match[1];
  }

  throw new Error("Invalid token");
}