/// <summary>
/// Attempts to connect to the given hostname using the given nickname.
/// </summary>
/// <param name="hostname">The server address, excluding the port.</param>
/// <param name="nickname">The nickname to use for the player connecting.</param>
private void Connect(string hostname, string nickname)
{
// Connect to the server.
ClientNetworking.ConnectToServer(
hostname,
11000,
state =>
{
_socketState = state;
// Listen for when data is received on the socket.
_socketState.DataReceived += DataReceived;
// Listen for when the socket disconnects.
_socketState.Disconnected += () => { Disconnected?.Invoke(); };
// Send the nickname of the user.
AbstractNetworking.Send(state, nickname + '\n');
// Wait for data.
AbstractNetworking.GetData(state);
},
reason => _connectionFailedCallback(reason)
);
}
/// <summary>
/// Receives boolean array of indicators of user input-movement for ships. Index 0
/// is the forward indicator, index 1 is the right indicator, index 2 is the left
/// indicator, and index 3 is the firing indicator.
/// Ships can move forward, left, right, and fire projectiles.
/// Action instructions are sent to the Server through this method.
/// </summary>
/// <param name="indicators"></param>
public void SendCommand(bool[] indicators)
{
if (!indicators[0] && !indicators[1] && !indicators[2] && !indicators[3])
{
return;
}
var commandBuilder = new StringBuilder("(");
if (indicators[0])
{
commandBuilder.Append('T');
}
if (indicators[1])
{
commandBuilder.Append('R');
}
if (indicators[2])
{
commandBuilder.Append('L');
}
if (indicators[3])
{
commandBuilder.Append('F');
}
commandBuilder.Append(')');
AbstractNetworking.Send(_socketState, commandBuilder + "\n");
}
/// <summary>
/// Called when the world is updated by the server.
/// </summary>
/// <param name="world">The world that was updated.</param>
private void OnWorldUpdated(World world)
{
// Serialize the World to JSON.
var worldData = new StringBuilder();
foreach (var ship in world.GetComponents <Ship>())
{
worldData.Append(JsonConvert.SerializeObject(ship)).Append("\n");
}
foreach (var proj in world.GetComponents <Projectile>())
{
worldData.Append(JsonConvert.SerializeObject(proj)).Append("\n");
}
foreach (var star in world.GetComponents <Star>())
{
worldData.Append(JsonConvert.SerializeObject(star)).Append("\n");
}
// Clear the client's commands.
foreach (var command in ClientCommands.Keys)
{
ClientCommands[command] = false;
}
AbstractNetworking.Send(_state, worldData.ToString());
}
/// <summary>
/// This attempts to connect to the server at the ip provided.
/// </summary>
/// <param name="server">String ip of the server.</param>
/// <param name="name">Name to send.</param>
public void ConnectToServer(String server, String name = "Tarun")
{
// This is where we connect to the server for the first time. After the setup is done we
// want our callback to be FirstContact.
ClientNetworking.ConnectToServer(server,
state =>
{
SuccessfulConnection?.Invoke("Connected to host: " + server);
_socketState = state;
// Listen for when data is received on the socket.
_socketState.DataReceived += DataReceived;
// Listen for when the socket disconnects.
_socketState.Disconnected += () => { Disconnected?.Invoke(); };
// Send the register message with the server.
Debug.WriteLine(REGISTER, "sending register message");
AbstractNetworking.Send(state, REGISTER);
// Wait for data.
AbstractNetworking.GetData(state);
},
reason => ErrorCallback?.Invoke(reason));
}
/// <summary>
/// This method will be in charge of sending messages in a appropriate manner to the client.
/// </summary>
/// <param name="data"></param>
public void SendMessage(string data)
{
if (_socketState != null)
{
data += END_OF_TEXT;
AbstractNetworking.Send(_socketState, data);
}
}
/// <summary>
/// Sends a message to the server requesting to load a spreadsheet of the parameter name.
/// </summary>
/// <param name="name"></param>
public void Load(String name)
{
// protocol-specified string for a load message to the Server
var loadMessage = LOAD_PREFIX + name + END_OF_TEXT;
// sending the message to the Server
AbstractNetworking.Send(_socketState, loadMessage);
}
/// <summary>
/// Sends the first packet that a client should receive.
/// </summary>
private void SendFirstPacket()
{
var packet = new StringBuilder();
// Player ID
packet.Append(Id).Append('\n');
// World Size
packet.Append(_gameServerController.Configuration.WorldSize).Append('\n');
// Send packet.
AbstractNetworking.Send(_state, packet.ToString());
}
/// <summary>
/// Disconnects from the server.
/// This should reset this client to default state.
/// </summary>
public void Disconnect()
{
Debug.WriteLine("disconnecting");
// Sending disconnect message to the server, if state isn't null
if (_socketState != null)
{
AbstractNetworking.Send(_socketState, DISCONNECT);
}
// stopping timers
pingTimer?.Stop();
serverTimer?.Stop();
DisconnectSpreadsheetCallback?.Invoke();
}
/// <summary>
/// Called when data is received on the socket.
/// </summary>
/// <param name="data">The data that was received.</param>
public void DataReceived(string data)
{
// We know the first packet has been handled once the world is not null.
if (GameWorld == null)
{
ParseFirstPacket(data);
}
else
{
ParseJsonPacket(data);
}
// Get new data.
AbstractNetworking.GetData(_socketState);
}
/// <summary>
/// Called when data is received from the client.
/// </summary>
/// <param name="data">The data from the client.</param>
private void OnDataReceived(string data)
{
// Check for nickname packet.
if (!_nicknameReceived)
{
_nicknameReceived = true;
// Trim newline from nickname and invoke event.
var nickname = data.Replace("\n", "");
NicknameReceived?.Invoke(nickname);
// Send the first packet to the client.
SendFirstPacket();
// Listen for server events.
_gameServerController.WorldUpdated += OnWorldUpdated;
}
else
{
// Thrust
if (data.Contains("T"))
{
ClientCommands[Ship.Command.Thrust] = true;
}
// Left or Right
if (data.Contains("L"))
{
ClientCommands[Ship.Command.Left] = true;
}
else if (data.Contains("R"))
{
ClientCommands[Ship.Command.Right] = true;
}
// Fire
if (data.Contains("F"))
{
ClientCommands[Ship.Command.Fire] = true;
}
}
AbstractNetworking.GetData(_state);
}
/// <summary>
/// Asynchronously begins listening for client data.
/// </summary>
public void BeginListeningAsync()
{
AbstractNetworking.GetData(_state);
}
/// <summary>
/// Sends an http response packet to the client, with the given data.
/// </summary>
/// <param name="data">The data of the response.</param>
private void SendResponse(string data)
{
AbstractNetworking.Send(
_state,
Resources.Scoreboard_HTTP_Response_Prefix + data);
}
/// <summary>
/// Sends a message to the server requesting an Undo action.
/// </summary>
public void Undo()
{
AbstractNetworking.Send(_socketState, UNDO);
}
/// <summary>
/// Sends a message to the server requesting a Revert action with the specified cell.
/// </summary>
/// <param name="cell"></param>
public void Revert(String cell)
{
AbstractNetworking.Send(_socketState, REVERT_PREFIX + cell + END_OF_TEXT);
}
/// <summary>
/// Sends a message to the server requesting an Edit action with the specified cell.
/// </summary>
/// <param name="cell"></param>
public void Edit(String cell, string content)
{
AbstractNetworking.Send(_socketState, EDIT_PREFIX + cell + ":" + content + END_OF_TEXT);
}
/// <summary>
/// Called when data is received on the socket.
/// </summary>
/// <param name="data">The data that was received.</param>
public void DataReceived(string data)
{
var commands = data.Split(Convert.ToChar(END_OF_TEXT));
foreach (var message in commands)
{
if (message.Trim() == "")
{
continue;
}
// Add back EOT after being split.
var eotMessage = message + END_OF_TEXT;
Debug.WriteLine(eotMessage, "data recieved from from server ");
// If a disconnect message is received, Disconnect the client
if (eotMessage.Equals(DISCONNECT))
{
pingTimer.Stop();
serverTimer.Stop();
DisconnectSpreadsheetCallback?.Invoke();
}
// If a ping is received from the Server, send a ping_response back
if (eotMessage.Equals(PING))
{
AbstractNetworking.Send(_socketState, PING_RESPONSE);
}
// If a ping response is received from the Server, the Server ping response timer is reset
if (eotMessage.Equals(PING_RESPONSE))
{
// timer ensuring Server is still up resets, Server has another 60 seconds until
// another ping_response is necessary
serverTimer.Stop(); serverTimer.Start();
}
// We know the first packet has been handled once the world is not null.
if (eotMessage.Equals(FILE_LOAD_ERROR) || eotMessage.StartsWith(CONNECTION_ACCEPTED_PREFIX))
{
ParseFirstPacket(eotMessage);
}
else
{
// full_state is only received upon initial loading of spreadsheet
// and the ping loop begins after the full_state message is received
if (eotMessage.StartsWith(FULL_STATE_PREFIX))
{
FullStateDocumentDocument(eotMessage);
// if serverTimer reaches 60s, disconnect from the Server
serverTimer = new Timer(60000)
{
Enabled = true,
AutoReset = false
};
serverTimer.Elapsed += Disconnect;
// every 10 seconds (10000 milliseconds) another ping is sent to the Server
pingTimer = new Timer(10000)
{
Enabled = true
};
pingTimer.Elapsed += Ping;
// ping loop begins as both timers are started
pingTimer.Start();
serverTimer.Start();
}
else if (eotMessage.StartsWith(CHANGE_PREFIX))
{
ChangeDocument(eotMessage);
}
else if (eotMessage.StartsWith(FOCUS_PREFIX))
{
Focus_Cell(eotMessage, FOCUS_PREFIX);
}
else if (eotMessage.StartsWith(UNFOCUS_PREFIX))
{
Unfocus_Cell(eotMessage, UNFOCUS_PREFIX);
}
}
}
// Get new data.
AbstractNetworking.GetData(_socketState);
}
/// <summary>
/// Sends a ping message to the Server, is the delegate used when the pingTimer's Elapse event occurs.
/// </summary>
public void Ping(object sender, ElapsedEventArgs e)
{
AbstractNetworking.Send(_socketState, PING);
}
/// <summary>
/// Sends a message to the server requesting a Unfocus action with the specified cell.
/// Used so other clients may be notified that this client has stopped editing a cell.
/// </summary>
public void Unfocus()
{
AbstractNetworking.Send(_socketState, UNFOCUS_PREFIX + END_OF_TEXT);
}
/// <summary>
/// Sends a message to the server requesting a Focus action with the specified cell.
/// Used so other clients may be notified that this client is editing a cell.
/// </summary>
/// <param name="cell"></param>
public void Focus(String cell)
{
AbstractNetworking.Send(_socketState, FOCUS_PREFIX + cell + END_OF_TEXT);
}