private List <string> ExtractSocketData(SocketState socketState, int numLinesToRead = int.MaxValue)
{
lock (socketState) {
List <string> socketData = new List <string>();
int numLinesRead = 0;
foreach (string s in GetSocketDataSplitByNewlines(socketState))
{
if (string.IsNullOrWhiteSpace(s))
{
// sometimes the regex split creates empty strings, ignore them and continue looping
continue;
}
if (!StringEndsWithNewline(s))
{
// the rest of the message is incomplete, break the loop to leave the extra data alone
break;
}
socketData.Add(s);
socketState.RemoveData(0, s.Length);
numLinesRead++;
if (numLinesRead >= numLinesToRead)
{
break;
}
}
return(socketData);
}
}
/// <summary>
/// Given the data that has arrived so far,
/// potentially from multiple receive operations,
/// determine if we have enough to make a complete message,
/// and process it (print it and broadcast it to other clients).
/// </summary>
/// <param name="sender">The SocketState that represents the client</param>
private void ReceiveClientData(SocketState state)
{
lock (state)
{
string totalData = state.GetData();
//Console.WriteLine("Connected with stateID: " + state.ID);
string[] parts = Regex.Split(totalData, @"(?<=[\n])");
// Loop until we have processed all messages.
// We may have received more than one.
foreach (string p in parts)
{
// Ignore empty strings added by the regex splitter
if (p.Length == 0)
{
continue;
}
// The regex splitter will include the last string even if it doesn't end with a '\n',
// So we need to ignore it if this happens.
if (p[p.Length - 1] != '\n')
{
break;
}
// Process the message sent by client
ProcessMessage(p, state);
// Remove it from the SocketState's growable buffer
state.RemoveData(0, p.Length);
}
Networking.GetData(state); // continue to receive data
}
}
/// <summary>
/// This method processes the data received through the socket by splitting it and deserializing
/// each string.
/// </summary>
/// <param name="ss">Socket state representing the connection</param>
private void ProcessData(SocketState ss)
{
//Splits the string but keeps the '\n' characters
string totalData = ss.GetData();
string[] parts = Regex.Split(totalData, @"(?<=[\n])");
lock (TheWorld)
{
foreach (string p in parts)
{
//This is to ignore empty strings
if (p.Length == 0)
{
continue;
}
//This is so it ignores the last string if it doesn't end in '\n'
if (p[p.Length - 1] != '\n')
{
break;
}
//Calls a method to deserialize the data and then removes the data from the buffer
UpdateObject(p);
ss.RemoveData(0, p.Length);
}
}
}
/// <summary>
/// This method receives the startup data sent by the server (world size and player ID)
/// </summary>
/// <param name="ss">Socket state representing the connection</param>
private void ReceiveStartingData(SocketState ss)
{
if (ss.ErrorOccured == true)
{
ErrorEvent("Unable to receive tank ID and world size");
if (ss.TheSocket.Connected)
{
ss.TheSocket.Close();
}
return;
}
//Splits the data and stores it in a string array
string[] startingInfo = Regex.Split(ss.GetData(), @"\n");
//Parses and stores the ID and world size
tankID = Int32.Parse(startingInfo[0]);
TheWorld.worldSize = Int32.Parse(startingInfo[1]);
//Removes the ID and world size from the socket string builder and processes the other data received
ss.RemoveData(0, tankID.ToString().Length + TheWorld.worldSize.ToString().Length + 2);
ProcessData(ss);
//Changes the OnNetworkAction to the next method that will be called every frame
ss.OnNetworkAction = ReceiveFrameData;
Networking.GetData(ss);
}
/// <summary>
/// Private helper method to setup player ID, world size and JSON walls
/// that are only sent once.
/// </summary>
/// <param name="state"></param>
private void ProcessMessages(SocketState state)
{
string totalData = state.GetData();
string[] parts = Regex.Split(totalData, @"(?<=[\n])");
// Loop until we have processed all messages.
// We may have received more than one.
foreach (string p in parts)
{
// Ignore empty strings added by the regex splitter
if (p.Length == 0)
{
continue;
}
// The regex splitter will include the last string even if it doesn't end with a '\n',
// So we need to ignore it if this happens.
if (p[p.Length - 1] != '\n')
{
break;
}
// First two messages are of type integer; Setup ID and world size
int n;
bool isInt = int.TryParse(p, out n);
if (isInt)
{
if (PlayerID == null)
{
PlayerID = n;
}
else
{
if (theWorld.size == 0)
{
theWorld.size = n;
}
// Call our connected callback and use size to load in background
Connected();
}
continue;
}
// Skipping incomplete JSONS
if (p[0] != '{' || !p.EndsWith("\n"))
{
continue;
}
// Load and parse the incoming JSON
LoadObject(p);
// Then remove it from the SocketState's growable buffer
state.RemoveData(0, p.Length);
}
}
/// <summary>
/// This method will implement changes created from Control Commands
/// This is an event loop that will constantly receive messages from the socket states
/// </summary>
/// <param name="connection"></param>
private void GetActionDataFromClient(SocketState connectionToClient)
{
//Checks if error occured. This means connection broke and so player is disconnected from server
if (connectionToClient.ErrorOccured)
{
//Show that player has disconnected
Console.WriteLine("Player " + connections[connectionToClient].ToString() + " has disconnected");
//Set tank stats relevant to disconnecting
lock (connections)
{
int tankID = connections[connectionToClient];
serverWorld.Tanks[tankID].HasDisconnected = true;
serverWorld.Tanks[tankID].HasDied = true;
connections.Remove(connectionToClient);
return;
}
}
//Get JSON information from the socket state
string wholeData = connectionToClient.GetData();
string completeMessage;
//Make sure data is complete
if (!wholeData.EndsWith("\n"))
{
//find the last instance of the newline and split the string at that point
int completedPoint = wholeData.LastIndexOf('\n');
completeMessage = wholeData.Substring(0, completedPoint);
}
//Message is complete and we can move forward as normal
else
{
completeMessage = wholeData;
}
//Split string by newline
string[] movementUpdates = completeMessage.Split('\n');
foreach (string command in movementUpdates)
{
//Skip over empty strings
if (command == "")
{
continue;
}
//Process command
ControlCommand newCommand = JsonConvert.DeserializeObject <ControlCommand>(command);
//Update tank based on control command
UpdateTankState(newCommand, connectionToClient);
}
//Remove old data
connectionToClient.RemoveData(0, completeMessage.Length);
//Begin loop again
Networking.GetData(connectionToClient);
}
private void ServeHttpRequest(SocketState state)
{
if (state.ErrorOccured)
{
return;
}
string request = state.GetData();
state.RemoveData(0, request.Length);
string response = BuildHtmlResponse(request);
Networking.SendAndClose(state.TheSocket, response);
}
/// <summary>
/// callback method to continuously receive data from server and send data to server
/// </summary>
/// <param name="state"></param>
private void ReceiveWorld(SocketState state)
{
HandleConnectionError(state);
if (state.ErrorOccured)
{
return;
}
string totalData = state.GetData();
string[] parts = Regex.Split(totalData, @"(?<=[\n])");
// Loop until we have processed all messages.
// We may have received more than one.
foreach (string p in parts)
{
// Ignore empty strings added by the regex splitter
if (p.Length == 0)
{
continue;
}
// The regex splitter will include the last string even if it doesn't end with a '\n',
// So we need to ignore it if this happens.
if (p[p.Length - 1] != '\n')
{
break;
}
ProcessMessage(p);
if (UpdateArrived != null)
{
UpdateArrived();
}
// Then remove it from the SocketState's growable buffer
state.RemoveData(0, p.Length);
}
Networking.GetData(state); // Need to call this in order to get new string info into state
control.Moving = moveArray[moveIndex]; // control's moving is set
// Convert data need to send to server to JSON string
string sendMessage = JsonConvert.SerializeObject(control) + "\n";
Networking.Send(state.TheSocket, sendMessage); // send data to server
}
/// <summary>
/// Process the data in current state buffer, the method will find all tokens end with \n, and make sure all data being processed(ToDo) is complete.
/// It also saves incomplete data in the SocketState buffer and waits for the next incoming receive the complete the partial data
/// </summary>
/// <param name="state"></param>
/// <param name="ToDo"> A action that will be taken for each token(end with \n) in the data</param>>
private static string[] ProcessData(SocketState state)
{
string data = state.GetData();
string[] jArray = data.Split('\n');
if (data.Last() != '\n') // Meaning there is incomplete data in current buffer
{
// Keep partial data
state.RemoveData(0, data.LastIndexOf('\n') + 1);
// Set the last element to empty string
jArray[jArray.Length - 1] = "";
}
else
{
//All data are complete, clear the whole buffer
state.ClearData();
}
return(jArray);
}
private void ReceivePlayerName(SocketState state)
{
lock (state)
{
if (state.ErrorOccured)
{
RemoveClient(state.ID);
return;
}
string[] lines = state.GetData().Split('\n');
playerName = lines[0]; // save player name
PlayerNames.Add(state.ID, playerName);
state.RemoveData(0, playerName.Length);
}
Console.WriteLine(playerName + " joined the game.");
// send ID and world size to client
string sendMessage = state.ID + "\n" + theServerWorld.worldSize + "\n";
Networking.Send(state.TheSocket, sendMessage);
// Save the client state
// Need to lock here because clients can disconnect at any time
lock (clients)
{
clients[state.ID] = state;
}
SendWalls(state); // send walls info to the client
WallCollisionSize(); // extend the wall detection size
Tank tank = new Tank((int)state.ID, playerName);
RespawnTank(tank);
theServerWorld.Tanks.Add((int)state.ID, tank);
state.OnNetworkAction = ReceiveClientData;
// Continue the event loop that receives messages from this client
Networking.GetData(state);
}
/// <summary>
/// This method receives a socket state from receive message, getting the socket's message
/// and updating the world's models using Json messages.
/// </summary>
/// <param name="socket">Socket containing message data</param>
private void ProcessMessage(SocketState socket)
{
// Get string data from socket state
string JsonMessage = socket.GetData();
//This is a string that will contain all the complete data i.e. no partial Json strings at the end
string completeMessage;
//If the Json message does not end with newline, it means partial Json message at end so
//we take the part that we can process
if (!JsonMessage.EndsWith("\n"))
{
//find the last instance of the newline and split the string at that point
int completedPoint = JsonMessage.LastIndexOf('\n');
completeMessage = JsonMessage.Substring(0, completedPoint);
}
//Message is complete and we can move forward as normal
else
{
completeMessage = JsonMessage;
}
// Separate objects within Json message using new line
string[] parsedMessage = completeMessage.Split('\n');
JObject curObj;
JToken curToken;
// Loop through each Json segment and identify its type to update model.
// Once object type has been found pass in the Json message along with an int
// value that references it's type within the UpdateWorldModel method.
foreach (string curMessage in parsedMessage)
{
//Skip any strings that are empty so to not throw error
if (curMessage == "")
{
continue;
}
//Parse the Json object and compare to other objects
curObj = JObject.Parse(curMessage);
// Check if object is tank
curToken = curObj["tank"];
if (curToken != null)
{
UpdateWorldModel(curMessage, 0);
tankInfoReceived = true;
continue;
}
//Update world model with walls
curToken = curObj["wall"];
if (curToken != null)
{
UpdateWorldModel(curMessage, 1);
continue;
}
// Check if object is projectile
curToken = curObj["proj"];
if (curToken != null)
{
UpdateWorldModel(curMessage, 2);
continue;
}
// Check if object is PowerUp
curToken = curObj["power"];
if (curToken != null)
{
UpdateWorldModel(curMessage, 3);
continue;
}
// Check if object is Beam
curToken = curObj["beam"];
if (curToken != null)
{
UpdateWorldModel(curMessage, 4);
continue;
}
}
//Send the player ID to view for drawing purposes
//Only sends once we receive tank data about oursleves
if (tankInfoReceived)
{
PlayerIDGiven(playerID);
SendTankUpdate(selfTank);
}
//Clear old data
socket.RemoveData(0, completeMessage.Length);
//Notify the View to redraw the world
UpdateWorld();
}
/// <summary>
/// Processes the message received from the server. If it is a json object, it updates the world accordingly.
/// Otherwise, it is either the player id or world size, and thus sets those accordingly.
/// </summary>
private void ProcessMessage(SocketState state)
{
if (state.ErrorOccured)
{
return;
}
//Gets data and parts from data
string totalData = state.GetData();
string[] parts = Regex.Split(totalData, @"(?<=[\n])");
foreach (string s in parts)
{
//If the part has a length of 0, then it is not a complete message
if (s.Length <= 0)
{
continue;
}
//If the part does not end with newline, then the message is incomplete
if (s[s.Length - 1] != '\n')
{
break;
}
//If the part is a json, deserialize
if (s[0] == '{')
{
lock (world)
{
//Get the json object out of the part
JObject obj = JObject.Parse(s);
JToken type;
//Wall is not loaded
if (!world.WallsLoaded)
{
type = obj["wall"];
if (type != null)
{
Wall w = JsonConvert.DeserializeObject <Wall>(s);
world.AddWall(w.ID, w.p1, w.p2);
}
else
{
//As soon as we reach a JSON that isn't a wall, the walls are loaded
world.LoadWalls();
WorldLoaded();
}
}
//If it a tank, update the world
type = obj["tank"];
if (type != null)
{
Tank t = JsonConvert.DeserializeObject <Tank>(s);
world.UpdateTank(t.ID, t.location, t.orientation, t.aiming, t.name, t.hitPoints, t.score, t.died, t.disconnected);
}
//Projectile
type = obj["proj"];
if (type != null)
{
Projectile p = JsonConvert.DeserializeObject <Projectile>(s);
world.UpdateProjectile(p.ID, p.location, p.orientation, p.owner, p.died);
}
//Powerup
type = obj["power"];
if (type != null)
{
Powerup p = JsonConvert.DeserializeObject <Powerup>(s);
world.UpdatePowerup(p.ID, p.location, p.died);
}
//Beam
type = obj["beam"];
if (type != null)
{
Beam b = JsonConvert.DeserializeObject <Beam>(s);
BeamFired(b);
}
}
}
//If it is not a json object, then it must be the world size or player id
else
{
//If player id is not set, then the part is the player id
if (PlayerID < 0)
{
PlayerID = Int32.Parse(s);
IDLoaded();
}
//Otherwise, the part must be the world
else
{
world = new World(Int32.Parse(s));
}
}
lock (state)
{
//Remove the processed part
state.RemoveData(0, s.Length);
}
//If OnUpdate is set, call it
if (OnUpdate != null)
{
OnUpdate();
}
}
}
/// <summary>
/// Processes the message received from the server. If it is a json object, it updates the world accordingly.
/// Otherwise, it is either the player id or world size, and thus sets those accordingly.
/// </summary>
private void ProcessMessage(SocketState state)
{
if (state.ErrorOccured)
{
return;
}
//Gets data and parts from data
string totalData = state.GetData();
string[] parts = Regex.Split(totalData, @"(?<=[\n])");
foreach (string s in parts)
{
//If the part has a length of 0, then it is not a complete message
if (s.Length <= 0)
{
continue;
}
//If the part does not end with newline, then the message is incomplete
if (s[s.Length - 1] != '\n')
{
break;
}
//If the part is a json, deserialize
if (s[0] == '{')
{
lock (world)
{
//Get the json object out of the part
JObject obj = JObject.Parse(s);
JToken type;
//Commands
type = obj["controlcommand"];
if (type != null)
{
ControlCommand c = JsonConvert.DeserializeObject <ControlCommand>(s);
//do thing
}
}
}
//If it is not a json object, then it must be the player's name
else
{
lock (world)
{
users.Add(state, userCount);
//Change position to random
world.UpdateTank(userCount++, new Vector2D(0, 0), new Vector2D(0, 0), new Vector2D(0, 0), s, 3, 0, false, false);
}
}
lock (state)
{
//Remove the processed part
state.RemoveData(0, s.Length);
}
}
}
/// <summary>
/// Process any buffered messages separated by '\n'
/// Then inform the view
/// </summary>
/// <param name="state"></param>
private void ReceiveWorld(SocketState state)
{
//Gets the data from the state and splits it by a new line
string totalData = state.GetData();
string[] parts = Regex.Split(totalData, @"(?<=[\n])");
// Loop until we have processed all messages.
// We may have received more than one.
//Gets the player number, which should only be once
int playerNumber = 0;
havePlayerNum = int.TryParse(parts[0], out playerNumber);
parts[0] = "";
if (playerNumber != 0)
{
playerNum = playerNumber;
}
//Gets the dimensions of the world that should only happen once
int dim = 0;
haveDimension = int.TryParse(parts[1], out dim);
parts[1] = "";
if (dim != 0)
{
worldDimension = dim;
world = new World(worldDimension);
}
//Iterates through all the data given by the server
foreach (string p in parts)
{
// Ignore empty strings added by the regex splitter
if (p.Length == 0)
{
continue;
}
// The regex splitter will include the last string even if it doesn't end with a '\n',
// So we need to ignore it if this happens.
if (p[p.Length - 1] != '\n')
{
break;
}
//Locks with a world so that we process information in a single thread
lock (world)
{
//Parses the object with the JSON
JObject jObject = JObject.Parse(p);
//Converts the JSON object to a token based on the name of the string
JToken projToken = jObject["proj"];
JToken beamToken = jObject["beam"];
JToken tankToken = jObject["tank"];
JToken wallToken = jObject["wall"];
JToken powerToken = jObject["power"];
//If the projToken is not null, i.e. if the JSON string passed was a projectile, then it goes in this condition
if (projToken != null)
{
//Deserializes the string and converts it to a projectile
Projectile proj = JsonConvert.DeserializeObject <Projectile>(p);
//Adds the projectile to the world
world.SetProjectile(proj.GetID(), proj);
//If projectile is dead, removes the projectile from the world
if (proj.GetDead() == true)
{
world.GetProjectile().Remove(proj.GetID());
}
}
//If the beamToken is not null, i.e. if the JSON string passed was a beam, then it goes in this condition
if (beamToken != null)
{
//Deserializes the string and converts it to a beam
Beams b = JsonConvert.DeserializeObject <Beams>(p);
//Adds the beam in the world's beam dictionary
world.SetBeams(b.GetBeamID(), b);
}
//If the tankToken is not null, i.e. if the JSON string passed was a tank, then it goes in this condition
if (tankToken != null)
{
//Deserializes the string and converts it to a tank
Tank t = JsonConvert.DeserializeObject <Tank>(p);
//Sets the color of the tank based on the tank's ID
t.SetColor(t.GetID());
//Adds the tank to the world's tank dictionary
world.SetTanks(t.GetID(), t);
//If the hitpoints of the tank are 0, then it remove it from the dictionary
if (t.GetHitPoints() == 0)
{
world.GetTanks().Remove(t.GetID());
}
//If the tank gets disconnected, then it remove it from the dictionary
if (t.GetDisconnected())
{
world.GetTanks().Remove(t.GetID());
}
//If the tank is dead, then it remove it from the dictionary
if (t.GetDead())
{
world.GetTanks().Remove(t.GetID());
}
}
//If the wallToken is not null, i.e. if the JSON string passed was a wall, then it goes in this condition
if (wallToken != null)
{
//Deserializes the string and converts it to a wall
Wall w = JsonConvert.DeserializeObject <Wall>(p);
//Adds the wall to the world's wall dictionary
world.SetWalls(w.GetID(), w);
}
//If the powerToken is not null, i.e. if the JSON string passed was a powerup, then it goes in this condition
if (powerToken != null)
{
//Deserializes the string and converts it to a powerup
Powerups power = JsonConvert.DeserializeObject <Powerups>(p);
//Adds the powerup to the world's powerup dictionary
world.SetPowerups(power.GetID(), power);
//If the powerup is dead, then it removes it from the dictionary
if (power.GetDead())
{
world.GetPowerups().Remove(power.GetID());
}
}
}
// Then remove it from the SocketState's growable buffer
state.RemoveData(0, p.Length);
}
if (UpdateArrived != null)
{
// inform the view to redraw
UpdateArrived();
}
//Inform the server
Process();
}
/// <summary>
/// Processes the message received from the server. If it is a json object, it updates the world accordingly.
/// Otherwise, it is either the player id or world size, and thus sets those accordingly.
/// </summary>
private void ProcessMessage(SocketState state)
{
if (state.ErrorOccured)
{
return;
}
//Gets data and parts from data
string totalData = state.GetData();
string[] parts = Regex.Split(totalData, @"(?<=[\n])");
foreach (string s in parts)
{
//If the part has a length of 0, then it is not a complete message
if (s.Length <= 0)
{
continue;
}
//If the part does not end with newline, then the message is incomplete
if (s[s.Length - 1] != '\n')
{
break;
}
//If the part is a json, deserialize
if (s[0] == '{')
{
lock (controls)
{
//Get the json object out of the part
JObject obj = JObject.Parse(s);
JToken type;
//Commands
type = obj["moving"];
if (type != null)
{
ControlCommand c = JsonConvert.DeserializeObject <ControlCommand>(s);
if (!controls.ContainsKey(users[state]))
{
controls.Add(users[state], c);
}
else
{
controls[users[state]] = c;
}
}
}
}
//If it is not a json object, then it must be the player's name
else
{
lock (world)
{
Random r = new Random();
Vector2D RandLoc = new Vector2D(r.Next(-world.GetSize() / 2 + 16, world.GetSize() / 2 - 16), r.Next(-world.GetSize() / 2 + 16, world.GetSize() / 2 - 16));
while (CheckTankWallCollision(RandLoc))
{
RandLoc = new Vector2D(r.Next(-world.GetSize() / 2 + 16, world.GetSize() / 2 - 16), r.Next(-world.GetSize() / 2 + 16, world.GetSize() / 2 - 16));
}
world.UpdateTank((int)state.ID, RandLoc, new Vector2D(0, 1), new Vector2D(0, 1), s, 3, 0, false, false);
}
}
lock (state)
{
//Remove the processed part
state.RemoveData(0, s.Length);
}
}
}
