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using System;
namespace V3.Data.Internal
{
// TODO: once the game state is getting larger, we have to separate the
// save game metadata from the game state.
/// <summary>
/// A save game that has a timestamp and a title, and that can store
/// the game state.
/// </summary>
[Serializable]
public sealed class SaveGame : ISaveGame
{
/// <summary>
/// The creation time of this save game in local time.
/// </summary>
public DateTime Timestamp { get; set; }
/// <summary>
/// The compability version of this save game.
/// </summary>
public int Version { get; set; }
/// <summary>
/// The data stored in this save game.
/// </summary>
public GameState GameState { get; set; }
/// <summary>
/// Empty constructor for serialization.
/// </summary>
private SaveGame()
{
}
/// <summary>
/// Creates a new save game from the given data.
/// </summary>
/// <param name="timestamp">the creation time of the save game</param>
/// <param name="version">the compability version of the save game</param>
/// <param name="gameState">the game state to store in the save game</param>
internal SaveGame(DateTime timestamp, int version, GameState gameState)
{
Timestamp = timestamp;
Version = version;
GameState = gameState;
}
/// <summary>
/// Compares this save game object to another save game object based
/// on the creation time.
/// </summary>
/// <param name="saveGame">the save game to compare this save game
/// with</param>
/// <returns>a value less than zero if this save game has been saved
/// before the given save game, zero if they have been saved at the
/// same time and a value greater than zero if the given save game has
/// been saved before the given one</returns>
public int CompareTo(ISaveGame saveGame)
{
return Timestamp.CompareTo(saveGame.Timestamp);
}
}
}
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