add leaderboard

common/player.js

@@ -105,6 +105,8 @@ class Player {
 
                 let oldHealth = target.health
 
+                let dmg = Math.floor( (dp-0.001) * 10);
+
                 target.health += Math.floor( (dp-0.001) * 10);
 
                 target.vel.x += (target.pos.x - ent.pos.x) * 0.1;
@@ -112,6 +114,8 @@ class Player {
 
                 if (target.health <= 0 && oldHealth > 0) {
                     console.log(`Player ${target.you} died to a player ${ent.you}`);
+                    ent.health -= dmg;
+                    if (ent.health > 100) ent.health = 100;
                     ent.headCount++;
                 }
             }

db.js

@@ -0,0 +1,19 @@
+import sqlite3 from 'sqlite3'
+import { open } from 'sqlite'
+
+let db;
+
+async function initDb() {
+    if (db) return db;
+
+    db = await open({
+        filename: `${process.cwd()}/db/main.db`,
+        driver: sqlite3.Database
+    });
+
+    await db.run(`CREATE TABLE IF NOT EXISTS stats (username TEXT, ip TEXT, ko TEXT);`);
+
+    return db;
+}
+
+export default initDb;

game.js

@@ -1,12 +1,18 @@
 import GameBasic from "./common/game_basic.js";
 import NPC from "./common/npc.js";
 
+import initDb from './db.js';
+
+import { createHash } from "crypto";
+
+let db = await initDb();
+
 class Game extends GameBasic {
     constructor() {
         super();
         this.ws = [];
     }
-    sync(full = false) {
+    async sync(full = false) {
         let onScreen = this.entities.filter(x => x && x.health > 0).length;
 
         onScreen += 4;
@@ -31,11 +37,24 @@ class Game extends GameBasic {
         if (entList.length == 0) return;
 
         for (let client of this.ws) {
-            if (!client.active) continue;
-
             let wsEnt = client.ent;
 
             if (!wsEnt) continue;
+            
+            if (full && wsEnt.health < 1 && !wsEnt.picked) {
+                wsEnt.picked = true;
+
+                const hash = createHash('sha256');
+                hash.update(client.ip || '');
+
+                await db.run('INSERT INTO stats (username, ip, ko) VALUES (?,?,?)', [
+                    wsEnt.you,
+                    hash.digest('hex'),
+                    wsEnt.headCount
+                ]);
+            }
+
+            if (!client.active) continue;
 
             wsEnt.isYou = true;
 

index.js

@@ -4,6 +4,10 @@ import Game from "./game.js";
 import NPC from "./common/npc.js";
 import Player from "./common/player.js";
 
+import initDb from "./db.js";
+
+let db = await initDb();
+
 var app = express();
 expressW(app);
 
@@ -15,6 +19,10 @@ app.use('/crypto.js', express.static('./common/crypto.js'));
 app.use('/js', express.static('./common'));
 app.use(express.static('./static'));
 
+app.get('/leaderboard', async function(ws,req) {
+    req.send(JSON.stringify(await db.all('SELECT * from stats')));
+})
+
 app.ws('/', function (ws, req) {
     game.ws.push(ws);
     let player = new Player(false, true, game);
@@ -23,9 +31,10 @@ app.ws('/', function (ws, req) {
 
     ws.active = true;
     ws.ent = player;
+    ws.ip = req.headers["x-real-ip"];
 
     // This will only work under NGINX.
-    console.log(`Player ${player.you} joined under IP ${req.headers["x-real-ip"]}`)
+    console.log(`Player ${player.you} joined under IP ${ws.ip}`)
 
     ws.on('message', function message(msg) {
         let data = {};

package.json

@@ -2,7 +2,9 @@
   "dependencies": {
     "crypto": "^1.0.1",
     "express": "^4.21.0",
-    "express-ws": "^5.0.2"
+    "express-ws": "^5.0.2",
+    "sqlite": "^5.1.1",
+    "sqlite3": "^5.1.7"
   },
   "type": "module"
 }

static/index.css

@@ -8,6 +8,7 @@ section {
     width: 800px;
     margin-left: auto;
     margin-right: auto;
+    margin-bottom: 10px;
     background: rgb(255, 255, 255);
     border: solid rgb(200, 200, 200) 2px;
     border-radius: 10px;
@@ -27,7 +28,7 @@ h6 {
     line-height: 40px;
 }
 
-p {
+p, pre, s {
     margin: 10px;
 }
 

static/index.html

@@ -17,6 +17,10 @@
 		<canvas id='canvas'></canvas>
 		</div>
 	</section>
+	<section id='main'>
+		<h1>Leaderboard</h1>
+		<pre class='lb'></pre>
+	</section>
 	<script src='js/index.js' type="module"></script>
 </body>
 

static/js/index.js

@@ -212,7 +212,7 @@ class Game extends GameBasic {
 
         if (this.entities.length == 0) this.entities = [this.player];
     }
-    init() {
+    async init() {
         super.init();
 
         let that = this;
@@ -229,6 +229,19 @@ class Game extends GameBasic {
         setInterval(function () { that.render() }, 1000 / 60);
 
         game.canvas.onclick = () => that.click();
+
+        let jason = await (fetch('/leaderboard').then(x => x.json()))
+
+        let scores = {};
+
+        for (let e of jason) {
+            scores[e.ip] = scores[e.ip] || 0;
+            scores[e.ip] += e.ko ** 2;
+        }
+
+        scores = Object.entries(scores).sort((a,b) => b.ko - a.ko);
+
+        document.querySelector('.lb').textContent = scores.map(x => `${x[0]}: ${x[1]}`).join('\n');
     }
 }