QuickPlay/QuickPlay/Configuration.cs

using System;
using System.IO;

namespace QuickPlay
{
    /// <summary>
    /// Application (global) configuration data class
    /// </summary>
    [Serializable]
    sealed class AppConfiguration
    {
        public readonly string playerConfigUrl;

        public static AppConfiguration loadSavedConfiguration()
        {
            throw new NotImplementedException();
        }

        public void saveConfiguration()
        {



            // Make sure that the configuration is same
            var newConfig = AppConfiguration.loadSavedConfiguration();
            if (this != newConfig) throw new InvalidDataException("Saved configuration is different from the supplied one.");
        }
    }

    /// <summary>
    /// Configuration of the player.
    /// 
    /// Contains details about connection, configured songs &c.
    /// </summary>
    class PlayerConfiguration
    {
        public static PlayerConfiguration FromFile(StreamReader reader)
        {
            return null; // FIXME: Implement
        }
    }

    interface IPlayerConfigurationProvider
    {
        PlayerConfiguration GetConfiguration();
    }

    sealed class NetworkConfigurationProvider : IPlayerConfigurationProvider
    {
        PlayerConfiguration IPlayerConfigurationProvider.GetConfiguration()
        {
            throw new NotImplementedException();
        }
    }

    sealed class FileConfigurationProvider : IPlayerConfigurationProvider
    {
        StreamReader reader;
        public FileConfigurationProvider(StreamReader reader)
        {
            this.reader = reader;
        }
        
        public FileConfigurationProvider(string filename)
        {
            this.reader = new StreamReader(filename);
        }
        public PlayerConfiguration GetConfiguration()
        {
            return PlayerConfiguration.FromFile(reader);
        }
    }

    sealed class DummyConfigurationProvider : IPlayerConfigurationProvider
    {
        public PlayerConfiguration GetConfiguration() => null;
    }
}