MathsMania.js.save

var myGameInstances = []; // Stores the game instances so that the state of different game lobbies is not lost

// Raw (game logic only) Class
class Game {

    // Setting up instance variables that store game state...
    constructor(roomId, io) {
      this.MAX = 2; // Max number of players for game, this is specific for the game - ie. for pong this would be 2.
      this.endScore = 8;
      this.endTime = null;  //Note: will add a countdown timer to games, perhaps decide on max time allowed for any game
      this.roomId = roomId;
      this.num = 0;
      this.io = io;
      this.Users = []; // --> Stores the games user's state including their username and score.
      this.gUsers = []; // --> Stores the socket objects and their respective names, which is used when removing a user from the game, on disconnect.
      this.tester = null;


        // Player position variables
        this.player_1 = 0;
        this.player_2 = 0;

        // Ball position variables
        this.ball_x = 300; // Initially set to horizontal center
        this.ball_y = 200; // Initially set to vertical center

        // Ball velocity variables
        this.vel_x = 7// Initially set to one
        this.vel_y = 7; // Initially set to one
      }


showUsers() {
  console.log("Number of players in the lobby: " + this.gUsers.length);
  if (this.gUsers.length == 2) {
    // Sets the maximum number of users needed to start the game, this should really be dynamic instead of hardcoded (user choice?)
    //this.startGame();
    // When number of users required has been met, the game is started and game logic starts execution.z
    this.io.sockets.in(this.roomId).emit("gameStarted");
    this.dummyStart();
    console.log("game should start...");
    }
  }


addUsertoGame(socketId, name) { // When a new user has connected to a particular lobby, we add thre socketId and associcated name for reference in
      // various methods.
      this.Users.push(socketId);
      this.Users.push(name);

          this.num = this.num + 1;
          this.getSide(socketId, this.num);
          console.log("your side: " + this.num );


    };

    InformUserOfLobby(socket) {
      socket.emit("test", this.roomId);
    }


addUser(playerName) { // A new users state is strored in a user variable which is then added to the list of users.
  var user = {
    name: playerName,
    score: 0
  }

  this.gUsers.push(user);
  this.updateUsers();
}


// Method to remove a user from the list of users when they have disconnnected
removeUser(user) {

    for (var i = 0; i < this.gUsers.length; i++) {
        // Iterate through list of users until correct user is identified...
        if (user == this.gUsers[i].name) {
            // Removing user entry from list of users...
            this.gUsers.splice(i, 1);
            console.log("User: " + user + " has left the game");
            this.updateUsers();


            console.log("");
            console.log("PLAYER " + user + " HAS LEFT THE GAME...");
            console.log("");
        };
    };

    if (this.gUsers.length == 1) {
        this.endGame();
    }
}


updateUsers() {

    // Broadcast all the user names of the users that are in the game to all of the users...
    console.log("Users present in the game: " + this.gUsers.length);
    //this.io.sockets.in(this.roomId).emit("users", this.gUsers);
};


// This will cause the client loading screen to be hidden and the first question of the game generated by the updateQuestion() method
startGame() {
    //this.io.sockets.in(this.roomId).emit("gameStarted", true);
    //this.updateQuestion();  This needs to call dummyStart()
}


/*This method is triggered in the case when there is only one user left in the game and so they win by default.
IMPORTANT: This method will need to redirect the user back to the game page when the game ends so that they are not just stuck on the game
page. In addition when the game is over the game instance needs it summary data written to the SQL database and it will then need to be removed
from the myGameInstances array.*/
endGame() {

    console.log("endGame() is called");
    var destination = '/home.html';
    clearInterval(this.tester);
    this.io.sockets.in(this.roomId).emit("gameEnded",{"destination": destination, "users": this.gUsers});


}




getSide(socket, num){
  socket.emit("playerNumber", num);
  socket.emit("here", "ok");
}


updateScores(increment, player){


    player.score = player.score + increment; // Calculating new score

    if(player.score == this.endScore){  // Check if winning score has been achieved by player.
      this.endGame();
    }


    this.io.sockets.in(this.roomId).emit("scoreUpdate", {"player": player.name, "score": player.score});
    console.log("score increase triggered");

}

collideWithPaddle(){

  if((this.player_1) < this.ball_y && (this.player_1 + 100) > this.ball_y && (this.ball_x <= 20)){

    this.vel_x = -(this.vel_x * 1.05); // Ball gets faster after each ralley to prevent never ending games.

    console.log("paddle 1 new vel " + this.vel_x);
    this.vel_y = this.vel_y  + Math.floor(Math.random() * 2 + 1); // Randomness introduced for rebound velocity.
  }

else if((this.player_2) < this.ball_y && (this.player_2 + 100) > this.ball_y && (this.ball_x >= (1149-30))){

  this.vel_x = -(this.vel_x * 1.05);
  this.vel_y = this.vel_y  + Math.floor(Math.random() * 2 + 1);
  console.log("paddle 2 new vel " + this.vel_x);

  }
}


setPlayer(number, position){
console.log("---" + number + "-----")
  console.log("NO!");

  if(number == 1){
    this.player_1 = position;
    console.log("yes" + "" + number + "" + position);
  }

  else if(number == 2){
    this.player_2 = position;
      console.log("yes" + "" + number + "" + position);
  }

}


collideWithWall(){

  if( this.ball_y >= 763 || this.ball_y <= 0){
    this.vel_y = - this.vel_y
  }

  else if(this.ball_x >= 1149 || this.ball_x <= 0){

      // When there is a collision with a wall, update score.

      if(this.ball_x >= 1149){

        this.ball_x = (1149/2); // Reset to horizontal center
        this.ball_y = (763/2); // Reset set to vertical center

        this.vel_x = 7; // Reset x-axis velocity the the original
        this.vel_y = 7; // Reset y-axis velocity the the original

        //this.gUsers[0].score+=1;

        console.log("score for player 1: " + this.gUsers[0])
        this.updateScores(1, this.gUsers[0]);

      } // If ball hits right wall, award player 1 a point

      if(this.ball_x <= 0){


        this.ball_x = (1149/2); // Reset to horizontal center
        this.ball_y = (763/2); // Reset set to vertical center

        this.vel_x = 7; // Reset x-axis velocity the the original
        this.vel_y = 7; // Reset y-axis velocity the the original

        //this.gUsers[1].score+=1;

        console.log("score for player 2: " + this.gUsers[1]);
        this.updateScores(1, this.gUsers[1]);

      } // If ball hits left wall, award player 2 a point

          this.vel_x = -this.vel_x;
        }

      }


dummyStart(){
    this.io.sockets.in(this.roomId).emit('playerJoin', {"users": this.gUsers}); // set up scores
  var self = this;
   this.tester = setInterval(function(){

      self.collideWithWall();
      self.collideWithPaddle();
      console.log("paddle 1-2 new vel " + self.vel_x);
      self.ball_x = self.ball_x + self.vel_x;
      self.ball_y = self.ball_y + self.vel_y;

      //self.io.sockets.emit("drawBall", {"x": self.ball_x, "y": self.ball_y, "y1": self.player_1, "y2": self.player_2});
      self.io.sockets.in(self.roomId).emit("drawBall", {"x": self.ball_x, "y": self.ball_y, "y1": self.player_1, "y2": self.player_2});
      console.log(self.player_1 + "||" + self.player_2);

  },
   (1000/30));  // FPS set to 30
 }
}


/////////// index.js -> The (eventual)framework ///////////

/*TODO:
Make a leaderboard
Clean up code considerably! -- /// CURRENT TASK /// --> Due: 25th Febuary
Prevent users from joining when the game has begun -- for now an error message or redirect is adequate
Have dummy list of current lobbies that have spaces - 'could be in a view lobbies section'
Writing code to database

Author: Benedict Uttley
   Last Revision: 13/02/2018
   Version 1.1
   */
/* The code contained in index.js sets up a web server using the Node js run time environment. I have created a set of functions that allow simple
   client to server communication. Although the functions actual data will change (perhaps only slightly) from game to game, the structure can be used
   as the foundation of most of the games we will make.*/
/* For this simple maths game and games in the future, a number of tools have been used in addition to the basic Node install. Firstly to make the
   creation of the web server easier, the express framework has been used which just makes the same functionality possible in fewer lines and it makes
   tasks like serving the html pages to the users much easier. Secondly, what has made this multiplayer game creation not only possible but fast to
   create is the use of Socket.io which is a javascript library that allows for bi-directional communication between the users web browser and the
   server but also makes this communication real time, which is what gives it an interactive feel. It basically manages socket connections meaning
   when a new user connects (at the moment just to localhost:8080 on my computer) they have a socket created for them. This socket is like a
   communication channel between them and the server. This means that you can essentially send messages from server to client (or server to all
   clients, a broadcast) and from client to server.*/
/* When you have installed node you can install express and socket.io from the command line using the node package manager(npm). For example to
    install socket.io you would type npm install socket.io and it should then be installed.*/

//////////////////////////////////////////////////////////// CODE START //////////////////////////////////////////////////////////////////////////



var myGameInstances = []; // Stores the game instances so that the state of different game lobbies is not lost


/////////// Application Setup ///////////


// We use express to set up the application
var express = require('express');
var app = express();
// We create the http server
var server = require('http').createServer(app);
// We use sockets for our communication and the sockets will communicate on the server created above
var io = require('socket.io').listen(server);

var bodyParser = require('body-parser')
/**bodyParser.json(options)
 * Parses the text as JSON and exposes the resulting object on req.body.
 */
app.use(bodyParser.urlencoded({ extended: true }));

//app.use(express.bodyParser());

// This module is needed for this application as the game creates random usernames, the moniker module is used to generate these names
var Moniker = require('moniker');

// Here we declare the file we want to send to the client when a new user connects to the server, in this example it is page.HTML
var game_Name = "";
var user_name = "";
var game_type = "";
var lobby_input = "";
//app.use(express.static(__dirname + '/public'));
//app.use(express.static(__dirname + '/Maths_Mania'));
app.use(express.static(__dirname + '/public'));
app.post('/', function(req, res) {

// POST data to decide type of game and lobby to join...
console.log("username of user " + req.body.user.name);
user_name = req.body.user.name;
console.log("Type of lobby to join " + req.body.lobby.type);
game_type = req.body.lobby.type;

if (game_type == 'Private') {
  lobby_input = req.body.lobby.name;
} else {
  lobby_input = null;
}


// console.log("Lobby to join " + req.body.p_or_r.lobby)
// POST data to decide type of game and lobby to join...

  var url = require("url");
  var params = url.parse(req.url,true).query;
  console.log(params.game_Name);
  game_Name = params.game_Name;
  res.sendFile(__dirname + '/index.html');
});
// We will run the web server on port 8080 which is the standard for a web server application
server.listen(8081);

/////////// Application Setup ///////////




/////////// Listeners (required regardless of game played) ///////////


/* This is the first use of socket.io in this application. io.sockets.on() is used when you are referring to all connections, so all the current
   players in the maths game. Here we are saying that when a new connection is established (which is detected automatically) then a socket is
   created for that connection and this socket is unique to that client. */

//var num = 0;
var name; // Holds the username of connection
var game; // Holds the game instance
//pong = new Game("",io);
io.sockets.on('connection', function(socket) {
 socket.username = user_name;
 name = user_name;
 console.log(user_name);
  //num++;

  //console.log(num);   // For now, let num be ~ username

  //pong.getSide(socket, num);
  //pong.addUser(num);

  //if(num == 2){
    //pong.dummyStart();
  //}
    //const Game = require('./gameServer_Side.js');

    // Print out a log indicating there has been a new connection, just useful for testing
    console.log("Successful Connection!");


    // socket.on('login', function(playerName) {
    //     name = playerName;
    //     socket.username = user_name;
    //     console.log("player name is: " + user_name);
    // });


// --- TODO CURRENTLY BEING WORKED ON ---

var assigned = false;
  //  socket.on('room', function(room) {
      if(game_type == "Random" && myGameInstances.length > 0) {

        // Search for best game to join.

        let current_contender = null;
        for(var i = 1; i<myGameInstances.length; i = i+2) {

          if((current_contender == null) && (myGameInstances[i].gUsers.length < myGameInstances[i].MAX)) {
            current_contender = myGameInstances[i];
            console.log('ppp');
            console.log("Game Object: " + current_contender);
          }

          if( (myGameInstances[i].gUsers.length > current_contender.gUsers.length) &&
             (current_contender.gUsers.length < current_contender.MAX)) {  // Store current 'most populated' game, as this is the one to be added to,
                                                                         // as long as the max allowed for that game is not exceeded.
            current_contender = myGameInstances[i];
          }

        }


        // TODO: Assign to random game -- Need to implement 'balanced' game assigning.
        console.log("Looking for random lobby to join. New or random.");

        // Fetch the room of the game to be joined and set the room variable to it...
        room = current_contender.roomId;
        console.log("roomId: " + current_contender.roomId);
        if(room == null) {   // If there are no free rooms then make a new roomId, which is a randomly generated ID.
          '_' + Math.random().toString(36).substr(2, 9);
        }
}
      } else if(game_type == "Random" && myGameInstances.length == 0){
          room = '_' + Math.random().toString(36).substr(2, 9); // If this is the only game, then generate a ramdom new roomId.
      }

      // --- TODO CURRENTLY BEING WORKED ON ---


      else if (game_type == "private") {
        room = lobby_input;
        console.log("Joining a private game lobby, which has a specific name.");
      }

        console.log("newroom: " + room);
        if (io.sockets.adapter.rooms[room]) { // Check if room the user wants to join already exists...
          console.log("room being checked for: " + room )
            socket.join(room); // joining the new room
            socket.room = room;

            // search for existing game object...
            for (var i = 0; i < myGameInstances.length; i++) {
                // joining the existing room;
                if (myGameInstances[i] == room) {
                    // Fetch the respective game instance...
                    game = myGameInstances[i + 1];
                    console.log("existing game");
                }
            }

            // should really store game data in Json or some other more readable format rather than a object array...

            // If the user wants to join a new lobby...
        } else {
            console.log("room being checked for: " + room )
            socket.join(room); // joining the new room
            socket.room = room;
            game = new Game(socket.room, io);
            myGameInstances.push(room);
            myGameInstances.push(game);
            console.log("new Game");

        };
        //game.getSide(socket, num);
        socket.emit("details", {'username':user_name,'room':room});
        console.log("£££" + user_name);
        io.sockets.in(room).emit('message', 'User ' + socket.username + ' has joined the lobby');
        game.addUsertoGame(socket,name);
        game.addUser(name);
        socket.emit("yourGame", game.roomId);
        game.showUsers();
        //io.sockets.in(room).emit('playerJoin', {"users": game.gUsers});

/////////// Listeners (required regardless of game played) ///////////


/////////// Listeners (chat specific) ///////////


socket.on('clientMessage', function(data){
  io.sockets.in(room).emit('message', socket.username + ' ~ ' + data );
});

socket.on("lobbyOver", function(){

  for(var i = 0; i< myGameInstances.length; i+=2){

      if (myGameInstances[i] == socket.room) {

             gamea = myGameInstances[i + 1];
             gamea.endGame();
           }
         }
       });




    //var listeners = require('./gameListeners.js')(socket, game, io, myGameInstances);
    //console.log("Number of lobbies for the game: " + (myGameInstances.length / 2));
    socket.on("mousemove", function(data){
console.log("mouse move triggered..." + data.number);
      var gamea;

          for(var i = 0; i< myGameInstances.length; i+=2){

              if (myGameInstances[i] == data.theGame) {
                  console.log("mouse move triggered... again" + data.number);
                      gamea = myGameInstances[i + 1];
                      gamea.setPlayer(data.number, data.position);
                  }
              }
        });


        socket.on('disconnect', function() {

        console.log("disconnection detected...");
        for(var i = 0; i< myGameInstances.length; i+=2){
          console.log("-------------------");
                 console.log(myGameInstances[i]);

            if (myGameInstances[i] == socket.room) {

                   gamea = myGameInstances[i + 1];

          for (var i = 0; i < gamea.Users.length; i += 2) { // Search for player name to remove

                        if (gamea.Users[i] == socket) {  //pb
                            var playerToRemove = gamea.Users[i + 1];
                            gamea.removeUser(playerToRemove);
                            io.sockets.in(gamea.roomId).emit('message', 'User ' + socket.username + ' has left the lobby');
                          }
                      }

                      if(gamea.gUsers.length == 0) {
                        console.log("Lobby empty, closing game...");
                        myGameInstances = myGameInstances.splice(i, 1);   // Remove game name from array of games...
                        myGameInstances = myGameInstances.splice(i,1);    // Elements shift down by one, remove game object...
                      }
                    }

                    console.log("Current number of games: " + myGameInstances.length/2);

                  }
                });

  //  });
  });

/*  Just a quick overview of what has happened in the above core functions:
    The addUser function creates a new user with a unique random name and appends it to the array called users.
    The removeUser function removes a given user form the array called users.
    The updateUsers function sends a string containing a list of all the current users in the game including the users name and score.*/