/// <summary>
/// loads the game state from blob storage, initializes it if it doesn't already exist
/// </summary>
private void LoadState()
{
MemoryStream tmpStream = new MemoryStream();
try
{
stateBlob.DownloadToStreamAsync(tmpStream).Wait();
devicelist = JsonConvert.DeserializeObject <List <bpDevice> >(Encoding.UTF8.GetString(tmpStream.ToArray()));
}
catch (Exception ex)
{
// if the container doesn't already exist, create it and an empty device collection
if (ex.InnerException is StorageException && ex.InnerException.Message.Contains("does not exist"))
{
container.CreateIfNotExistsAsync().Wait(); // create container
devicelist = new List <bpDevice>(); // create an empty device list
}
}
// initialize collection with game state "device" if it doesn't already exist
if (devicelist.Count <= 0)
{
bpDevice statedevice = new bpDevice()
{
deviceId = "GameState",
accessToken = "false"
};
devicelist.Add(statedevice); // add to the list
}
}
public async static Task <HttpResponseMessage> Run([HttpTrigger(AuthorizationLevel.Function, "post", Route = "devices")] HttpRequestMessage req, TraceWriter log)
{
log.Info("RegisterDevice processed a request.");
HttpResponseMessage rtnResponse = null;
try
{
// Get request body, should contain deviceId and accessToken
//bpDevice deviceData = JsonConvert.DeserializeObject<bpDevice>(await req.Content.ReadAsStringAsync());
bpDevice deviceData = await req.Content.ReadAsAsync <bpDevice>();
GameStateManager gameState = new GameStateManager(); // get game state
if (!gameState.IsRunning) // if game isn't running
{
gameState.RegisterDevice(deviceData); // register the device
log.Info($"Registering Device {deviceData.deviceId}");
}
// respond to request
rtnResponse = req.CreateResponse(HttpStatusCode.OK);
}
catch (RuntimeBinderException ex)
{
// "deviceData didn't deserialize properly
rtnResponse = req.CreateResponse(HttpStatusCode.BadRequest, @"Please pass the device ID and Access Token in the body of your request: { ""deviceID"" : ""value"", ""accesstoken"" : ""value""}");
}
catch (Exception ex)
{
// "name property doesn't exist in request body
rtnResponse = req.CreateResponse(HttpStatusCode.InternalServerError, $"An unhandled exception occured: {ex.Message}");
}
return(rtnResponse);
}
private static async void Send(bpDevice targetDevice, string function, string requestBody = "")
{
// Posts a message to the device endpoint directly
WebRequest request = WebRequest.Create($"https://api.particle.io/v1/devices/{targetDevice.deviceId}/{function}?access_token={targetDevice.accessToken}");
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
Stream dataStream = request.GetRequestStream();
byte[] requestbody = Encoding.UTF8.GetBytes($"args={requestBody}");
dataStream.Write(requestbody, 0, requestbody.Length);
dataStream.Close();
WebResponse response = await request.GetResponseAsync();
response.Close();
}
/// <summary>
/// Registers a new device, returns true if successful. Won't allow an add if it already exists or a game is running
/// </summary>
/// <param name="newDevice"></param>
/// <returns></returns>
public bool RegisterDevice(bpDevice newDevice)
{
bool resultValue = false;
if (!this.IsRunning) // if a game isn't currently running
// add the device if its not already in the list
{
if (!GameState.Exists(i => i.deviceId == newDevice.deviceId))
{
GameState.Add(newDevice);
this.SaveState();
resultValue = true;
}
}
return(resultValue);
}
public async static Task <HttpResponseMessage> Run([HttpTrigger(AuthorizationLevel.Function, "put", Route = "pong")] HttpRequestMessage req, TraceWriter log)
{
log.Info("Pong recieved from device.");
HttpResponseMessage rtnResponse = null;
try
{
// Get request body, should contain deviceId and accessToken
bpPong pongData = await req.Content.ReadAsAsync <bpPong>();
log.Info($"Pong received from device {pongData.deviceId}.");
GameStateManager gameState = new GameStateManager(); // get game state
if (gameState.IsRunning) // if game isn't running
{
if (pongData.success == false) // last device failed to respond in time, remove it
{
gameState.RemoveDevice(pongData.deviceId);
}
// select next device to ping and prepare response (-1 if this is the last device, aka the winner)
bpDevice randomDevice = gameState.GetRandomDevice();
log.Info($"Sending initial ping to device {randomDevice.deviceId}.");
SendToDevice.Ping(randomDevice, (gameState.DeviceCount > 1 ? 5000 : -1));
if (gameState.DeviceCount <= 1) // game is over, stop game
{
gameState.StopGame();
}
}
// respond to request
rtnResponse = req.CreateResponse(HttpStatusCode.OK);
}
catch (RuntimeBinderException ex)
{
// "name property doesn't exist in request body
rtnResponse = req.CreateResponse(HttpStatusCode.BadRequest, @"Please pass the device ID and status of the 'ping' in the body of your request: { ""deviceID"" : ""value"", ""status"" : true|false }");
}
return(rtnResponse);
}
public async static Task <HttpResponseMessage> Run([HttpTrigger(AuthorizationLevel.Function, "put", Route = "game")] HttpRequestMessage req, TraceWriter log)
{
log.Info("StartGame received a request.");
HttpResponseMessage rtnResponse = req.CreateResponse(HttpStatusCode.OK);
// we'll only do this if we're not already doing start notifications
if (notificationTask == null || notificationTask.Status != TaskStatus.Running)
{
GameStateManager gameState = new GameStateManager(); // get game state
if (!gameState.IsRunning) // if game isn't running
{
List <bpDevice> deviceList = gameState.GetDeviceList();
// if we have more than 1 device
if (deviceList.Count > 1)
{
gameState.StartGame();
// start device notification background task
notificationTask = new Task(() =>
{
log.Info("StartGame: Starting device notification.");
// get list of devices
pingTasks = new List <Task>();
foreach (bpDevice device in deviceList)
{
pingTasks.Add(Task.Run(() =>
{
log.Info($"StartGame: Notifying device {device.deviceId} of start.");
SendToDevice.Start(device);
}));
}
Task.WaitAll(pingTasks.ToArray());
Thread.Sleep(3000); // wait three seconds after all pings are complete
bpDevice randomDevice = gameState.GetRandomDevice();
log.Info($"StartGame: Sending initial ping to device {randomDevice.deviceId}.");
SendToDevice.Ping(randomDevice, 5000);
});
// spin off a thread to send the pings in the background so we can return immediately to caller
notificationTask.Start();
}
else
{
log.Info($"StartGame: Only one device. Don't you have any friends?");
}
}
else
{
log.Info("StartGame: Game already running. So I'm going to ignore this.");
}
}
else
{
log.Info("StartGame: Notifications currently running. So I'm going to ignore this.");
}
return(rtnResponse);
}
/// <summary>
/// Sends a start signal to a device
/// </summary>
/// <param name="targetDevice"></param>
public static void Start(bpDevice targetDevice)
{
Send(targetDevice, "startGame");
}
/// <summary>
/// Sends a ping event
/// </summary>
/// <param name="deviceToPing">the device ID and access token for the target device</param>
/// <param name="value">the timeout value</param>
public static void Ping(bpDevice deviceToPing, int value)
{
Send(deviceToPing, "ping", value.ToString());
}
