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server.js
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server.js
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'user strict';
const express = require( 'express' );
const pg = require( 'pg' );
const WebSocket = require( 'ws' );
const http = require( 'http' );
const uuidv4 = require( 'uuid/v4' );
const url = require( 'url' );
const PrecisionTimer = require( './modules/PrecisionTimer.js' );
let timer = new PrecisionTimer();
timer.Start();
const GameServer = require( './modules/GameServer.js' );
const app = express();
const webServer = http.createServer( app );
app.use( express.static( __dirname + '/' ) );
app.get( '/', function( req, res ){
res.sendFile( __dirname + "/start.html" );
});
class Database {
constructor(){
this.pool = new pg.Pool( {
user: 'giuseppecanale',
host: '127.0.0.1',
database: 'giuseppecanale',
password: '',
idleTimeoutMillis: 30000,
port: '5432' } );
};
select( id, emitter ){
this.pool.query( 'SELECT * FROM parameters WHERE id = $1', [id], function( err, res ) {
if( err ) {
return console.error( 'error running SELECT ', err );
};
return emitter.Parameters( res.rows[0] );
});
};
insert(){
this.pool.query( 'INSERT INTO parameters(username, password) VALUES($1, $2) returning id', [req.body.username, req.body.password], function( err, res ) {
if( err ) {
return console.error( 'error running INSERT', err );
};
});
};
update( skillId, value ){
this.pool.query( `UPDATE parameters SET p${skillId} = $1 WHERE id = 1`, [value], function( err, res ) {
if( err ) {
return console.error( 'error running UPDATE', err );
};
});
};
delete(){
this.pool.query( 'DELETE FROM parameters WHERE id = $1', [req.params.id], function( err, res ) {
if( err ) {
return console.error( 'error running DELETE', err );
};
});
};
};
class Server extends Database {
constructor(){
super();
this.gameServer;
this.emitter = require( './emitter.js' );
this.wss = new WebSocket.Server( { server: webServer } );
this.wss.on( 'connection', function connection( ws, req ) {
this.onConnection( ws );
ws.on( 'message', function message( data ) {
this.onMessage( data, ws );
}.bind( this ) );
}.bind( this ) );
};
onConnection( ws ) {
this.lobby = uuidv4();
//this.emitter.init( ws ); // single connection
this.emitter.init( this.wss ); // for broadcast
this.select( "1", this.emitter );
if ( !this.gameServer ) {
this.gameServer = new GameServer( timer );
};
};
onMessage( data, ws ) {
let JSONdata = JSON.parse( data )
if( "state" in JSONdata ) {
switch( JSONdata.state ) {
case "reset":
this.gameServer == null;
break;
case "update":
this.update( JSONdata.skillId, JSONdata.value );
break;
};
};
};
};
let server = new Server();
const PORT = process.env.PORT || 4000;
webServer.listen( PORT, function listening() {
console.log( 'Listening on %d', webServer.address().port );
});