const shapeFlags = (flags) =>
  flags.reduce((shapedFlags, flag) => {
    const [flagName, rawValue] = flag.split('=');
    const value = rawValue ? rawValue.replace(';', '') : true;
    return { ...shapedFlags, [flagName]: value };
  }, {});

export const extractCookies = (headers) => {
  const cookies = headers['set-cookie'];

  return cookies.reduce((shapedCookies, cookieString) => {
    const [rawCookie, ...flags] = cookieString.split('; ');
    const [cookieName, value] = rawCookie.split('=');
    return {
      ...shapedCookies,
      [cookieName]: { value, flags: shapeFlags(flags) }
    };
  }, {});
};