Configuration.cs

/*-
 * Copyright (c) 2014 Software Development Solutions, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

using System;
using System.Configuration;

namespace SpotifyWolf
{
    [Serializable]
    public class Configuration
    {
        public string Username { get; set; }

        public string Password { get; set; }

        public byte[] ApplicationKey { get; set; }

        public string OutputFolder { get; set; }

        private static Configuration _instance;

        private Configuration()
        {
        }

        internal static Configuration Instance
        {
            get
            {
                if (_instance == null)
                {
                    _instance = InitializeFromAppconfig();

                    if (_instance == null)
                    {
                        _instance = new Configuration();
                    }
                }
                return _instance;
            }
        }

        internal bool HasLoginCredentials
        {
            get
            {
                return !String.IsNullOrWhiteSpace(Configuration.Instance.Username) &&
                       !String.IsNullOrWhiteSpace(Configuration.Instance.Password) &&
                       Configuration.Instance.ApplicationKey != null;
            }
        }

        private static Configuration InitializeFromAppconfig()
        {
            Configuration config = new Configuration();

            if (!String.IsNullOrEmpty(ConfigurationManager.AppSettings["Username"]) &&
                !String.IsNullOrEmpty(ConfigurationManager.AppSettings["Password"]) &&
                !String.IsNullOrEmpty(ConfigurationManager.AppSettings["Outputfolder"]))
            {
                config.Username = ConfigurationManager.AppSettings["Username"];
                config.Password = ConfigurationManager.AppSettings["Password"];
                config.OutputFolder = ConfigurationManager.AppSettings["Outputfolder"];

                return config;
            }
            else
                return null;
        }
    }
}