/// <summary>
/// Initializes a new <see cref="Main"/> instance.
/// </summary>
public Main()
{
_languageManager = new LanguageManager();
Game = new Game(1);
_needSaveGamePrompt = false;
_languageManager.PropertyChanged += LanguageManager_PropertyChanged;
}
/// <summary>
/// Loads a previously saved game from a file chosen by the user.
/// </summary>
/// <param name="game">The game which has been loaded from the chosen file.</param>
/// <returns><see langword="true"/> if the user has chosen a valid saved game file to load
/// and the game has been loaded into <paramref name="game"/> successfully.</returns>
/// <exception cref="Exception">
/// The chosen saved game file is damaged or does not contain a valid Untangle saved game.
///
/// -or-
/// The chosen saved game file was created by a newer version of the game.
/// </exception>
public static bool LoadGame(out Game game)
{
string fileName;
if (!PromptForFileToLoad(out fileName))
{
game = null;
return false;
}
// Load the saved game object from the specified file
SavedGame savedGame = LoadFromFile(fileName);
// Verify saved game version
if (savedGame.Version > CurrentVersion)
throw new Exception(ExceptionMessages.SavedGameVersionNotSupported);
// Verify that game level vertices are saved
if (savedGame.Vertices == null)
throw new Exception(ExceptionMessages.DamagedSavedGame);
// Create the game and return it
GameLevel gameLevel = GameLevel.Create(savedGame.Vertices);
game = new Game(gameLevel, savedGame.LevelNumber);
return true;
}
/// <summary>
/// Starts a new game of Untangle from scratch.
/// </summary>
/// <remarks>
/// <para>The user will be prompted to save his current game progress, if needed.</para>
/// </remarks>
public void NewGame()
{
if (!PromptForSaveGame())
return;
Game = new Game(1);
_needSaveGamePrompt = false;
}
/// <summary>
/// Saves a game to a file chosen by the user.
/// </summary>
/// <param name="game">The game to be saved.</param>
/// <returns><see langword="true"/> if the user has chosen to save the game and the saved
/// game file has been created successfully.</returns>
public static bool SaveGame(Game game)
{
string fileName;
if (!PromptForFileToSave(out fileName))
return false;
// Create saved vertex objects
var savedVertices = new Dictionary<ViewModels.Vertex, Vertex>();
int idCounter = 0;
foreach (ViewModels.Vertex vertex in game.Level.GameObjects.OfType<ViewModels.Vertex>())
{
var savedVertex = new Vertex
{
Id = idCounter++,
X = vertex.X,
Y = vertex.Y,
};
savedVertices[vertex] = savedVertex;
}
// Attach connected vertex IDs to saved vertex objects
foreach (KeyValuePair<ViewModels.Vertex, Vertex> pair in savedVertices)
{
pair.Value.ConnectedVertexIds = pair.Key.ConnectedVertices
.Select(d => savedVertices[d].Id)
.ToArray();
}
// Create saved game objects
var savedGame = new SavedGame
{
Version = CurrentVersion,
CreationDate = DateTime.Now,
LevelNumber = game.LevelNumber,
VertexCount = game.Level.VertexCount,
IntersectionCount = game.Level.IntersectionCount,
Vertices = savedVertices.Values.ToArray(),
};
// Save the saved game object to the specified file
SaveToFile(savedGame, fileName);
return true;
}