Clock.cs

#region Copyright (c) 2007 by Dan Shechter

////////////////////////////////////////////////////////////////////////////////////////
////
//  IBNet, an Interactive Brokers TWS .NET Client & Server implmentation
//  by Dan Shechter
////////////////////////////////////////////////////////////////////////////////////////
//  License: MPL 1.1/GPL 2.0/LGPL 2.1
//  
//  The contents of this file are subject to the Mozilla Public License Version 
//  1.1 (the "License"); you may not use this file except in compliance with 
//  the License. You may obtain a copy of the License at 
//  http://www.mozilla.org/MPL/
//  
//  Software distributed under the License is distributed on an "AS IS" basis,
//  WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
//  for the specific language governing rights and limitations under the
//  License.
//  
//  The Original Code is any part of this file that is not marked as a contribution.
//  
//  The Initial Developer of the Original Code is Dan Shecter.
//  Portions created by the Initial Developer are Copyright (C) 2007
//  the Initial Developer. All Rights Reserved.
//  
//  Contributor(s): None.
//  
//  Alternatively, the contents of this file may be used under the terms of
//  either the GNU General Public License Version 2 or later (the "GPL"), or
//  the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
//  in which case the provisions of the GPL or the LGPL are applicable instead
//  of those above. If you wish to allow use of your version of this file only
//  under the terms of either the GPL or the LGPL, and not to allow others to
//  use your version of this file under the terms of the MPL, indicate your
//  decision by deleting the provisions above and replace them with the notice
//  and other provisions required by the GPL or the LGPL. If you do not delete
//  the provisions above, a recipient may use your version of this file under
//  the terms of any one of the MPL, the GPL or the LGPL.
////////////////////////////////////////////////////////////////////////////////////////

#endregion

using System;

namespace Daemaged.IBNet
{
  public enum ClockMode
  {
    Playback,
    Realtime
  }

  internal class Clock
  {
    readonly ClockMode _mode;
    DateTime _lastPlaybackEventTime;

    public Clock(ClockMode mode)
    {
      _mode = mode;
    }


    public ClockMode Mode => _mode;

    public DateTime Now
    {
      get
      {
        switch (_mode) {
          case ClockMode.Realtime:
            return DateTime.Now;
          case ClockMode.Playback:
            return _lastPlaybackEventTime;
        }
        return DateTime.MinValue;
      }
      set
      {
        if (_mode != ClockMode.Playback)
          throw new InvalidOperationException("Cannot set Now when clock mode is not in plaback");

        _lastPlaybackEventTime = value;
      }
    }
  }
}