/// <summary>
/// Establish new game session.
/// If the player is a guest, they must first download the game settings first (not implemented)
/// </summary>
/// <returns>True if the establishment is successful or false on failure</returns>
public void Establish()
{
_tokenSource = new CancellationTokenSource();
_cancelToken = _tokenSource.Token;
// change multiplayer game state depending on role
switch (_role)
{
case MultiplayerRole.Guest:
var task = Firebase.Get(GetLink("state"));
task.Wait();
// malformed state
if (!int.TryParse(task.Result, out int _state))
{
Close();
}
GameState state = (GameState)_state;
if (state == GameState.Connecting || state == GameState.Waiting)
{
CurrentData.ChangeGameState(GameState.Playing);
}
break;
case MultiplayerRole.Host:
CurrentData.ChangeGameState(GameState.Waiting);
break;
}
// overall upload task
_uploadTask = UploadTask.CreateInstance(_cancelToken);
// overall download task
_downloadTask = DownloadTask.CreateInstance(_cancelToken, (result) =>
{
// must try here because exception could throw in following code of try block
try
{
// the result will be merged
Logger.Log(result);
MergeData(result);
}
catch (Exception e)
{
Logger.Log("Exception raised: " + e.Message);
Close();
}
});
// main task to initiate both uploading and downloading tasks
_mainTask = Task.Run(() =>
{
PlayerData data = _role == MultiplayerRole.Host ? CurrentData.Host : CurrentData.Guest;
while (!_cancelToken.IsCancellationRequested)
{
Logger.Log("Doing main task here...");
data.Time = TimePlayed;
UploadData(data);
DownloadData();
Thread.Sleep(1000);
}
}, _cancelToken);
// set a running thread for closing connection from another thread
Task.Run(() =>
{
// preventing multiple threads "data racing" with closing this connection
// only one thread can request closing the connection
// the thread that is trying to close is actually a part
// of one player's program that is passively waiting
// for further instruction on closing the multiplayer game
// -> the last one to close is the one to delete data, simple
while (!_requestCloseConnection && !IsConnectionClosed)
{
}
Close(true);
});
}