unibutton/index.js

import express from "express";
import expressW from "express-ws";
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);

var game = new Game();
game.init();

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) {
    let scores = game.scores || []; 
    req.send(scores.map((x,i) => `#${i+1}: ${x[0]} [${x[1]}: ${x[2]}]`).join('\n'));
})

app.ws('/', function (ws, req) {
    game.ws.push(ws);
    let player = new Player(false, true, game);
    let playerI = game.entities.length;
    game.entities[playerI] = player;

    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 ${ws.ip}`)

    ws.on('message', function message(msg) {
        let data = {};
        try {
            data = JSON.parse(msg);
        } catch (err) {
            console.log(err);
            data = [];
        }

        let type = data[0];

        if (type == 'AUTH') {
            game.authUser(ws,data[1]);
            return;
        }

        data.splice(0, 1);

        let newEnt = game.entities[playerI];

        let { you } = newEnt;

        let props = player.legalProps;

        for (let i in props) {
            let prop = data[i];
            let typed = (typeof prop);
            let keys = Object.keys(prop);

            let isC = (typed === 'object' && keys[0] == 'x' && keys[1] == 'y' && keys.length == 2 && typeof prop.x == 'number' && typeof prop.y == 'number');
            if (typed !== 'string' && typed !== 'number' && typed !== 'boolean' && typed !== 'undefined' && !isC) {
                console.warn(`Player ${you} attempted to send an invalid packet ${props[i]}`)
                continue;
            }
            newEnt[props[i]] = data[i];
        }

        let you2 = newEnt.you;

        if (you != you2) {
            console.log(`Player ${you} now identifies as ${you2}`);
        }

        if (newEnt.ref) {
            console.log(`Player ${you2} discovered this game from ${newEnt.ref}`);
            newEnt.ref = undefined;
        }
    })

    ws.on('close', function () {
        console.log(`Player ${game.entities[playerI].you} left`);
        ws.active = false;
        player.health = -1;
    })
});

app.listen(process.env.PORT || 3069);