Sample TankBlaster bot in Node.js

Arena/src/Arena/Resources/ArenaInstruction.html

@@ -116,6 +116,7 @@
             <li><a href="#dotNet">.Net Bots</a></li>
             <li><a href="#php">PHP Bots</a></li>
             <li><a href="#java">JAVA Bots</a></li>
+            <li><a href="#nodejs">Node.js Bots</a></li>
             <li><a href="#firewall">Firewall Configuration</a></li>
         </ul>
     </nav>
@@ -340,6 +341,36 @@
         </article>
     </section>
 
+    <section id="nodejs">
+        <header>Bot written in Node.js</header>
+        <article>
+            <ul>
+                <li>
+                    Setup sample bot in Node.js
+                    <ol>
+                        <li>Download Node.js  from <a href="https://nodejs.org/en/" target="blank">https://nodejs.org/en/</a> and install it</li>
+                        <li>Copy folder "TankBlasterBot" (hello_wars/nodeJs/TankBlasterBot/) to your local directory </li>
+                        <li>Open command prompt and go to project directory</li>
+                        <li>Type "npm install" to install all necessary modules</li>
+                        <li>Type "node app.js" to run application</li>
+                        <li>Your bot should be accessible at "http://localhost:8081/". Check "http://localhost:8081/info" in your browser to see if it works</li>
+                    </ol>
+                </li>
+
+                <li>
+                    Modify ArenaConfiguration file:
+                    <ol>
+                        <li>change game type you wish to play</li>
+                        <li>change elimination type name to your preferred elimination type</li>
+                        <li>modify bot urls. If you need more players, just type a few copies of the same url. They will be interpreted as a separate bots</li>
+                    </ol>
+                </li>
+                <li>When you run the arena, it should automatically connect with bots. Press "Play" to start game</li>
+            </ul>
+
+        </article>
+    </section>
+
     <section id="firewall">
         <header>Firewall configuration</header>
         <article>

nodeJs/TankBlasterBot/PerformNextMove.js

@@ -0,0 +1,144 @@
+var express = require('express');
+var bodyParser = require('body-parser');
+
+var arena = new Object();
+
+module.exports = (function() {
+    var api = express.Router();
+	api.use(bodyParser.json());
+    api.post('/PerformNextMove', function(req, res) {
+		arena = req.body;
+		var result = CalculateNextMove()
+		res.writeHead(200, {"Content-Type": "application/json"});
+		var json = JSON.stringify(result);
+		res.end(json);
+    });
+    return api;
+})();
+
+function CalculateNextMove()
+{
+	var result = new Object(); 
+
+	if(arena.MissileAvailableIn == 0 &&  Math.floor(Math.random() * 10) == 0){
+		result.Action = 2;
+		result.FireDirection = Math.floor(Math.random() * 4);
+	}
+	else if(Math.floor(Math.random() * 10 ) == 0) {
+		result.Action = 1;
+		result.FireDirection = 0;
+	}
+	else{
+		result.Action = 0;
+		result.FireDirection = 0;
+	}
+
+	result.Direction = GetDirection();
+
+	return result;
+}
+
+function GetDirection(){
+	var directions = [0, 1, 2, 3];
+	var availableDirections = new Array();
+
+	for(var i = 0; i < directions.length; i++){
+		if(!IsInDangerZone(AddDirectionMove(ParsePoint(arena.BotLocation) , directions[i]))){
+			availableDirections.push(directions[i]);
+		}
+	}
+
+	return availableDirections[Math.floor(Math.random() * availableDirections.length)];
+}
+
+function GetSurroundingPoints(centerLocation, radius){
+	var locations = new Array();
+	for (var i = 1; i <= radius; i++){
+		locations.push({ X:centerLocation.X, Y:centerLocation.Y + i});
+		locations.push({ X:centerLocation.X, Y:centerLocation.Y - i}); 
+		locations.push({ X:centerLocation.X + i, Y:centerLocation.Y}); 
+		locations.push({ X:centerLocation.X - i, Y:centerLocation.Y});		
+	}
+	return ValidateMultipleLocations(locations);
+}
+
+function ValidateMultipleLocations(locations){
+	var result = new Array();
+	for (var i = 0; i < locations.length; i++){
+		if(IsLocationValid(locations[i])){
+			result.push(locations[i]);
+		}			
+	}
+	return result;
+}
+
+function IsLocationValid(location){
+	xlen = arena.Board.length;
+	ylen = arena.Board[0].length;
+	var result = location.X >= 0 && location.X < xlen && location.Y >= 0 && location.Y < ylen;
+	return result;
+}
+
+function IsInDangerZone(location){
+	if (!IsLocationValid(location)){
+		return true;
+	}
+
+	for(var i = 0; i < arena.Bombs.length; i++){
+		var dangerZone = GetDangerZone(ParsePoint(arena.Bombs[i].Location) , arena.Bombs[i].ExplosionRadius);
+			for(var j = 0; j < dangerZone.length; j++){
+				if (dangerZone[j].X == location.X && dangerZone[j].Y == location.Y){
+					return true;
+				}
+			}
+	}
+
+	for(var i = 0; i < arena.Missiles.length; i++){
+		var dangerZone = GetDangerZone(ParsePoint(arena.Missiles[i].Location) , arena.Missiles[i].ExplosionRadius);
+		for(var j = 0; j < dangerZone.length; j++){
+			if (dangerZone[j].X == location.X && dangerZone[j].Y == location.Y){
+				return true;
+			}
+		}
+	}
+
+	if (arena.Board[location.X][location.Y] != 0){
+		return true;
+	}
+	return false;
+}
+
+function GetDangerZone(centerLocation, explosionRadius){
+	var result = GetSurroundingPoints(centerLocation, explosionRadius);
+	result.push(centerLocation);
+	return result;
+}
+
+function AddDirectionMove(location, direction){
+	var result = { X: location.X, Y: location.Y};
+	switch (direction){
+		case 0:
+			result.Y--;
+			break;
+
+		case 1:
+			result.Y++;
+			break;
+
+		case 2:
+			result.X++;
+			break;
+
+		case 3:
+			result.X--;
+			break;
+	}
+
+	return result;
+}
+
+function ParsePoint(str){
+	var arr = str.split(",");
+	return {X: parseInt(arr[0]) , Y: parseInt(arr[1])};
+}
+

nodeJs/TankBlasterBot/app.js

@@ -0,0 +1,10 @@
+var express = require('express');
+var info = require('./info');
+var PerformNextMove = require('./PerformNextMove');
+
+var app = express();
+
+app.get('/info', info);
+app.post('/PerformNextMove', PerformNextMove);
+
+var server = app.listen(8081);

nodeJs/TankBlasterBot/info.js

@@ -0,0 +1,22 @@
+var express = require('express');
+
+var info = {
+	Name:"node.js_Bot", 
+	Description:"I am NODE.JS Bot", 
+	GameType:"TankBlaster"
+	};
+module.exports = (function() {
+    var api = express.Router();
+
+    api.get('/info', function(req, res) {
+        res.writeHead(200, {"Content-Type": "application/json"});
+	   var json = JSON.stringify(info);
+	   res.end(json);
+    });
+    return api;
+})();
+
+
+
+
+

nodeJs/TankBlasterBot/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "NodeJsBot",
+  "version": "1.0.0",
+  "description": "Sample bot for TankBlaster game",
+  "main": "app.js",
+  "author": "SMT Software Services",
+  "license": "GPL-2.0"
+  "repository" : { 
+	"type" : "git", 
+	"url" : "https://github.com/michalczerwinski/hello_wars"
+  },
+  "dependencies": {
+    "express": "*",
+	"body-parser": "*"
+  }
+}