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server.js
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server.js
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"use strict";
process.title = 'game-node';
var webSocketsServerPort = 8181;
process.env.PORT = 8181;
// websocket and http servers
var webSocketServer = require('websocket').server;
var http = require('http');
var history = [ ];
var clients = [ ];
var win = 0;
var gameboard = [];
for (var i = 0; i < 19; i++) {
gameboard[i] = [];
for (var j = 0; j < 19; j++) {
gameboard[i][j] = 0;
}
}
var server = http.createServer(function(request, response) {});
server.listen(webSocketsServerPort, function() {
console.log(" Server listening for websocket on port " + webSocketsServerPort);
});
var wsServer = new webSocketServer({
httpServer: server
});
wsServer.on('request', function(request) {
var connection = request.accept(null, request.origin);
clients.push(connection);
if(clients.length > 2) {
connection.sendUTF(JSON.stringify({type: 'more-clients'}));
}
history[clients.indexOf(connection)] = [];
if (history.length > 0) {
connection.sendUTF(JSON.stringify( { type: 'history', data: history}));
}
connection.on('message', function(message) {
if(message.type == 'utf8') {
try {
var jsonObj = message.utf8Data;
var json = JSON.parse(jsonObj);
} catch (e) {
console.log('This doesn\'t look like a valid JSON: ', jsonObj);
return;
}
if (json.type == 'ClientConnect') {
console.log("Client ", clients.length);
if(clients.length == 2) {
console.log("Two Client Connected");
clients[1].sendUTF(JSON.stringify({ type: "second-client"}));
if( history.length > 1) {clients[1].sendUTF(JSON.stringify({type: "chance"}));}
}
}
else {
if (json.type == 'gameboard-index') {
console.log("Gameboard");
var i = json.data1;
var j = json.data2;
gameboard[i][j] = json.color;
win_check(i,j, json.color);
if(win >= 5) {
console.log("Winner", win);
var json_message = { type: "winner", data1: json.data1, data2: json.data2, color: json.color};
}
else {
var json_message = { type: "gameboard-index", data1: json.data1, data2: json.data2, color: json.color };
history[clients.indexOf(connection)].push(json_message);
}
for (var i = 0; i < clients.length; i++) {
clients[i].sendUTF(JSON.stringify(json_message));
console.log("send to client ", i);
}
} else {
console.log('Hmm..., I\'ve never seen JSON like this: ', json);
}
}
}
});
connection.on('close', function() {
// history = [];
var a = clients.indexOf(connection);
if(a != -1) {
history.splice(a, 1);
}
clients.splice(a, 1);
console.log("Connection close client ", a);
for (var i = 0; i < clients.length; i++) {
clients[i].sendUTF(JSON.stringify({type: "close-win", color: a}));
}
});
});
function win_check(row, col, usr_value) {
win = 0;
//forward vertically
forward_check(row, col, 1, usr_value);
// backward vertically
backward_check(row, col, 1, usr_value);
if(win >= 5) {
return;
}
else {
win = 0;
}
//forward horizontally
forward_check(col, row, 0, usr_value);
// backward horizontally
backward_check(col, row, 0, usr_value);
if(win >= 5) {
return;
}
else {
win = 0;
}
//diagonal forward downwards check
diagonal_forward_down(row, col, usr_value);
//diagonal backward upwards check
diagonal_backward_up(row, col, usr_value);
if(win >= 5) {
return;
}
else {
win = 0;
}
//diagonal forward upwards check
diagonal_forward_up(row, col, usr_value);
//diagonal backward downward check
diagonal_backward_down(row, col, usr_value);
if(win >= 5) {
return;
}
else {
win = 0;
}
}
// first argument tells the searching - horizon or vertical and second argument for gameboard.
function forward_check(dir, value, pro, usr) {
//forward horizontally
if(dir <= 14) {
var next = 4;
}
else {
var next = 18 - dir;
}
if(pro == 1) {
for(var c = dir; c <= dir+next; c++) {
// console.log("forward vertical", dir , value, usr);
if(gameboard[c][value] == 0 || gameboard[c][value] != usr) {
// console.log("break");
break;
}
if(gameboard[c][value] == usr ) {
win++;
}
}
}
else {
for(var c = dir; c <= dir+next; c++) {
// console.log("forward horizontal", value , dir, usr);
if(gameboard[value][c] == 0 || gameboard[value][c] != usr) {
// console.log("break");
break;
}
if(gameboard[value][c] == usr ) {
win++;
}
}
}
if(win == 1) {
win = 0;
}
}
// first argument tells the searching - horizon or vertical and second argument for gameboard.
function backward_check(dir, value, pos, usr) {
//backward horizontally
if (dir >= 4) {
var previous = 4;
}
else {
previous = dir;
}
if(pos == 1) {
for(var c = dir; c >= dir-previous; c--) {
// console.log("backward vertical", dir , value, usr);
if(gameboard[c][value] == 0 || gameboard[c][value] != usr) {
// console.log("break");
break;
}
if(gameboard[c][value] == usr ) {
win++;
}
}
}
else {
for(var c = dir; c >= dir-previous; c--) {
// console.log("backward horizontal", value , dir, usr);
if(gameboard[value][c] == 0 || gameboard[value][c] != usr) {
// console.log("break");
break;
}
if(gameboard[value][c] == usr ) {
win++;
}
}
}
}
function diagonal_forward_down(row, col, usr) {
var fun_win = 0;
for(var c = 0; c <= 4 ; c++) {
if(row + c <= 18 && col + c <= 18) {
// console.log("diagonal forward down", row, col, usr);
if(gameboard[row+c][col+c] == 0 || gameboard[row+c][col+c] != usr) {
// console.log("break");
break;
}
if(gameboard[row+c][col+c] == usr ) {
fun_win++;
win++;
}
}
}
if(fun_win == 5) {
win = 5;
return;
}
if(win >= 1) {
win--;
}
}
function diagonal_backward_up(row, col, usr) {
var fun_win = 0;
for(var c = 0; c <= 4 ; c++) {
if(row-c >= 0 && col - c >= 0) {
// console.log("diagonal backward up", row, col, usr);
if(gameboard[row-c][col-c] == 0 || gameboard[row-c][col-c] != usr) {
// console.log("break");
break;
}
if(gameboard[row-c][col-c] == usr ) {
fun_win++;
win++;
}
}
}
if(fun_win == 5) {
win = 5;
return;
}
}
function diagonal_backward_down(row, col, usr) {
var fun_win = 0;
for(var c = 0; c <= 4 ; c++) {
if(row + c <= 18 && col - c >= 0) {
// console.log("diagonal backward down", row, col, usr);
if(gameboard[row+c][col-c] == 0 || gameboard[row+c][col-c] != usr) {
// console.log("break");
break;
}
if(gameboard[row+c][col-c] == usr ) {
win++;
fun_win++;
}
}
}
if(fun_win == 5) {
win = 5;
return;
}
}
function diagonal_forward_up(row, col, usr) {
var fun_win = 0;
for(var c = 0; c <= 4 ; c++) {
if(row - c >= 0 && col + c <= 18) {
// console.log("diagonal forward up", row, col, usr);
if(gameboard[row-c][col+c] == 0 || gameboard[row-c][col+c] != usr) {
// console.log("break");
break;
}
if(gameboard[row-c][col+c] == usr ) {
win++;
fun_win++;
}
}
}
if(fun_win == 5) {
win = 5;
return;
}
if(win >= 1) {
win--;
}
}