// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.

// Parity 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 of the License, or
// (at your option) any later version.

// Parity 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 Parity.  If not, see <http://www.gnu.org/licenses/>.

export function toPromise (fn) {
  return new Promise((resolve, reject) => {
    fn((err, res) => {
      if (err) {
        reject(err);
      } else {
        resolve(res);
      }
    });
  });
}

export function identity (x) {
  return x;
}

export function capitalize (str) {
  return str[0].toUpperCase() + str.slice(1).toLowerCase();
}