public async Task <IStorageFile> GetGameFileAsync(GameID gameID)
{
var localStorageRoot = ApplicationData.Current.LocalFolder;
var activeGamesFolder = await localStorageRoot.GetFolderAsync(ActiveGamesFolderName);
var completedGamesFolder = await localStorageRoot.GetFolderAsync(CompletedGamesFolderName);
var filename = GetFileNameFromGameID(gameID);
StorageFile gameFile = null;
try
{
gameFile = await activeGamesFolder.GetFileAsync(filename);
}
catch (FileNotFoundException)
{
// continue to check completed games folder
}
if (gameFile == null)
{
try
{
gameFile = await completedGamesFolder.GetFileAsync(filename);
}
catch (FileNotFoundException)
{
throw new ArgumentException("The specified GameID does not correspond to a saved game.");
}
}
return(gameFile);
}
public async Task <bool> CompleteGameAsync(GameID gameID)
{
var localStorageRoot = ApplicationData.Current.LocalFolder;
var activeGamesFolder = await localStorageRoot.GetFolderAsync(ActiveGamesFolderName);
var completedGamesFolder = await localStorageRoot.GetFolderAsync(CompletedGamesFolderName);
var previousGameInfo = await GetGameInformationAsync(gameID);
try
{
var gameFile = await activeGamesFolder.GetFileAsync(GetFileNameFromGameID(gameID));
await gameFile.MoveAsync(completedGamesFolder, GetFileNameFromGameID(gameID));
}
catch (Exception)
{
return(false);
}
OnGameCompleted(new GameCompletedEventArgs(new GameInformation(
previousGameInfo.GameDataStore,
previousGameInfo.FriendlyName,
previousGameInfo.GameType,
previousGameInfo.TimeLastMoved,
previousGameInfo.MoveCount,
false)));
return(true);
}
private static string GetFriendlyNameFromGameID(GameID gameID)
{
var gameIDStr = gameID.GetOfflineTwoPlayerGameID();
var parts = gameIDStr.Split(new char[] { '_' });
System.Diagnostics.Debug.Assert(parts.Length == 2);
System.Diagnostics.Debug.Assert(parts[1].EndsWith(_extension));
return(parts[0]);
}
public async Task <GameInformation> GetGameInformationAsync(GameID gameID)
{
bool isActive = true;
var localStorageRoot = ApplicationData.Current.LocalFolder;
var activeGamesFolder = await localStorageRoot.GetFolderAsync(ActiveGamesFolderName);
var completedGamesFolder = await localStorageRoot.GetFolderAsync(CompletedGamesFolderName);
var filename = GetFileNameFromGameID(gameID);
StorageFile gameFile = null;
try
{
gameFile = await activeGamesFolder.GetFileAsync(filename);
}
catch (FileNotFoundException)
{
isActive = false;
// continue to check completed games folder
}
if (gameFile == null)
{
try
{
gameFile = await completedGamesFolder.GetFileAsync(filename);
}
catch (FileNotFoundException)
{
throw new ArgumentException("The specified GameID does not correspond to a saved game.");
}
}
var fileProperties = await gameFile.GetBasicPropertiesAsync();
using (var fileStream = await gameFile.OpenReadAsync())
{
using (var reader = new DataReader(fileStream))
{
await reader.LoadAsync((uint)fileStream.Size);
reader.UnicodeEncoding = Windows.Storage.Streams.UnicodeEncoding.Utf8;
reader.ByteOrder = Windows.Storage.Streams.ByteOrder.LittleEndian;
var moveCount = reader.ReadUInt32();
return(new GameInformation(
new GameDataStore(this, gameID),
GetFriendlyNameFromGameID(gameID),
GameType.OfflineTwoPlayer,
fileProperties.DateModified.LocalDateTime,
moveCount,
isActive));
}
}
}
public async Task <string> GetGameStateAsync(GameID gameID)
{
var localStorageRoot = ApplicationData.Current.LocalFolder;
var activeGamesFolder = await localStorageRoot.GetFolderAsync(ActiveGamesFolderName);
var completedGamesFolder = await localStorageRoot.GetFolderAsync(CompletedGamesFolderName);
var filename = GetFileNameFromGameID(gameID);
StorageFile gameFile = null;
try
{
gameFile = await activeGamesFolder.GetFileAsync(filename);
}
catch (FileNotFoundException)
{
// continue to check completed games folder
}
if (gameFile == null)
{
try
{
gameFile = await completedGamesFolder.GetFileAsync(filename);
}
catch (FileNotFoundException)
{
throw new ArgumentException("The specified GameID does not correspond to a saved game.");
}
}
System.Diagnostics.Debug.Assert(gameFile != null);
string stateString = null;
using (var fileStream = await gameFile.OpenReadAsync())
{
using (var reader = new DataReader(fileStream))
{
await reader.LoadAsync((uint)fileStream.Size);
reader.UnicodeEncoding = Windows.Storage.Streams.UnicodeEncoding.Utf8;
reader.ByteOrder = Windows.Storage.Streams.ByteOrder.LittleEndian;
var numMoves = reader.ReadUInt32();
if (reader.UnconsumedBufferLength > 0)
{
stateString = reader.ReadString(reader.UnconsumedBufferLength);
}
return(stateString);
}
}
}
public async Task <bool> StoreTurnRecordAsync(GameID gameID, string turnRecordStr)
{
var localStorageRoot = ApplicationData.Current.LocalFolder;
var activeGamesFolder = await localStorageRoot.GetFolderAsync(ActiveGamesFolderName);
StorageFile gameFile = null;
try
{
gameFile = await activeGamesFolder.GetFileAsync(GetFileNameFromGameID(gameID));
}
catch (FileNotFoundException)
{
return(false);
}
var previousGameInfo = await GetGameInformationAsync(gameID);
var previousState = await GetGameStateAsync(gameID);
previousState = previousState ?? String.Empty;
using (var transaction = await gameFile.OpenTransactedWriteAsync())
{
using (var writer = new DataWriter(transaction.Stream.GetOutputStreamAt(0)))
{
writer.UnicodeEncoding = Windows.Storage.Streams.UnicodeEncoding.Utf8;
writer.ByteOrder = ByteOrder.LittleEndian;
writer.WriteUInt32((uint)(previousGameInfo.MoveCount + 1));
writer.WriteString(previousState + Environment.NewLine + turnRecordStr);
transaction.Stream.Size = await writer.StoreAsync();
await transaction.CommitAsync();
writer.DetachStream();
}
}
return(true);
}
private static string GetFileNameFromGameID(GameID gameID)
{
var id = gameID.GetOfflineTwoPlayerGameID();
return(id + _extension);
}
