Binato/server/BanchoServer.ts

import { ConsoleHelper } from "../ConsoleHelper";
import { Database } from "./objects/Database";
import { LatLng } from "./objects/LatLng";
import { LoginProcess } from "./LoginProcess";
import { Packets } from "./enums/Packets";
import { replaceAll } from "./Util";
import { readFileSync } from "fs";
import { RedisClientType, createClient } from "redis";
import { Request, Response } from "express";
import { UserArray } from "./objects/UserArray";
import { User } from "./objects/User";
const config:any = JSON.parse(readFileSync(__dirname + "/config.json").toString());
// TODO: Port osu-packet to TypeScript
const osu = require("osu-packet");

/*const 
	  loginHandler = require("./loginHandler.js"),
	  parseUserData = require("./util/parseUserData.js"),
	  getUserFromToken = require("./util/getUserByToken.js"),
	  getUserById = require("./util/getUserById.js"),
	  bakedResponses = require("./bakedResponses.js"),
	  Streams = require("./Streams.js");*/

const DB:Database = new Database(config.database.address, config.database.port, config.database.username, config.database.password, config.database.name, async () => {
	// Close any unclosed db matches on startup
	DB.query("UPDATE mp_matches SET close_time = UNIX_TIMESTAMP() WHERE close_time IS NULL");
	DB.query("UPDATE osu_info SET value = 0 WHERE name = 'online_now'");
});

// Users funkyArray for session storage
const users = new UserArray();

// Add the bot user
const botUser:User = users.add("bot", new User(3, "SillyBot", "bot", DB));
// Set the bot's position on the map
botUser.location = new LatLng(50, -32);

let redisClient:RedisClientType;

async function subscribeToChannel(channelName:string, callback:(message:string) => void) {
	// Dup and connect new client for channel subscription (required)
	const subscriptionClient:RedisClientType = redisClient.duplicate();
	await subscriptionClient.connect();
	// Subscribe to channel
	await subscriptionClient.subscribe(channelName, callback);
	ConsoleHelper.printRedis(`Subscribed to ${channelName} channel`);
}

if (config.redis.enabled) {
	(async () => {
		redisClient = createClient({
			url: `redis://${replaceAll(config.redis.password, " ", "") == "" ? "" : `${config.redis.password}@`}${config.redis.address}:${config.redis.port}/${config.redis.database}`
		});

		redisClient.on('error', e => ConsoleHelper.printRedis(e));

		const connectionStartTime = Date.now();
		await redisClient.connect();
		ConsoleHelper.printRedis(`Connected to redis server. Took ${Date.now() - connectionStartTime}ms`);

		// Score submit update channel
		subscribeToChannel("binato:update_user_stats", (message) => {
			if (typeof(message) === "string") {
				const user = users.getById(parseInt(message));
				if (user != null) {
					// Update user info
					user.updateUserInfo(true);

					ConsoleHelper.printRedis(`Score submission stats update request received for ${user.username}`);
				}
			}
		});
	})();
} else ConsoleHelper.printWarn("Redis is disabled!");

// User timeout interval
setInterval(() => {
	for (let User of users.getIterableItems()) {
		if (User.uuid == "bot") continue; // Ignore the bot

		// Logout this user, they're clearly gone.
		// if (Date.now() >= User.timeoutTime)
		// 	Logout(User);
	}
}, 10000);

// Init stream class
//Streams.init();

// An array containing all chat channels
/*global.channels = [
	{ channelName:"#osu", channelTopic:"The main channel", channelUserCount: 0, locked: false },
	{ channelName:"#userlog", channelTopic:"Log about stuff doing go on yes very", channelUserCount: 0, locked: false },
	{ channelName:"#lobby", channelTopic:"Talk about multiplayer stuff", channelUserCount: 0, locked: false },
	{ channelName:"#english", channelTopic:"Talk in exclusively English", channelUserCount: 0, locked: false },
	{ channelName:"#japanese", channelTopic:"Talk in exclusively Japanese", channelUserCount: 0, locked: false },
];*/

// Create a stream for each chat channel
/*for (let i = 0; i < global.channels.length; i++) {
	Streams.addStream(global.channels[i].channelName, false);
}*/

// Add a stream for the multiplayer lobby
//Streams.addStream("multiplayer_lobby", false);

// Include packets
/*const ChangeAction = require("./Packets/ChangeAction.js"),
	  SendPublicMessage = require("./Packets/SendPublicMessage.js"),
	  Logout = require("./Packets/Logout.js"),
	  Spectator = require("./Spectator.js"),
	  SendPrivateMessage = require("./Packets/SendPrivateMessage.js"),
	  MultiplayerManager = require("./MultiplayerManager.js"),
	  SetAwayMessage = require("./Packets/SetAwayMessage.js"),
	  ChannelJoin = require("./Packets/ChannelJoin.js"),
	  ChannelPart = require("./Packets/ChannelPart.js"),
	  AddFriend = require("./Packets/AddFriend.js"),
	  RemoveFriend = require("./Packets/RemoveFriend.js"),
	  UserPresenceBundle = require("./Packets/UserPresenceBundle.js"),
	  UserPresence = require("./Packets/UserPresence.js"),
	  UserStatsRequest = require("./Packets/UserStatsRequest.js"),
	  MultiplayerInvite = require("./Packets/MultiplayerInvite.js"),
	  TourneyMatchSpecialInfo = require("./Packets/TourneyMatchSpecialInfo.js"),
	  TourneyMatchJoinChannel = require("./Packets/TourneyMatchSpecialInfo.js"),
	  TourneyMatchLeaveChannel = require("./Packets/TourneyLeaveMatchChannel.js");*/

// A class for managing everything multiplayer
//const multiplayerManager:MultiplayerManager = new MultiplayerManager();

const EMPTY_BUFFER = Buffer.alloc(0);

export async function HandleRequest(req:Request, res:Response, packet:Buffer) {
	// Remove headers we don't need for Bancho
	res.removeHeader('X-Powered-By');
	res.removeHeader('Date');

	// Get the client's token string and request data
	const requestTokenString:string | undefined = req.header("osu-token");

	// Check if the user is logged in
	if (requestTokenString == null) {
		// Only do this if we're absolutely sure that we're connected to the DB
		if (DB.connected) {
			// Client doesn't have a token yet, let's auth them!
			
			await LoginProcess(req, res, packet, DB, users);
			DB.query("UPDATE osu_info SET value = ? WHERE name = 'online_now'", [users.getLength() - 1]);
		}
	} else {
		let responseData:Buffer | string = EMPTY_BUFFER;

		// Client has a token, let's see what they want.
		try {
			// Get the current user
			const PacketUser:User | undefined = users.getByToken(requestTokenString);

			// Make sure the client's token isn't invalid
			if (PacketUser != null) {
				// Update the session timeout time
				PacketUser.timeoutTime = Date.now() + 60000;

				// Create a new osu! packet reader
				const osuPacketReader = new osu.Client.Reader(packet);
				// Parse current bancho packet
				const PacketData = osuPacketReader.Parse();

				// Go through each packet sent by the client
				for (let CurrentPacket of PacketData) {
					/*switch (CurrentPacket.id) {
						case Packets.Client_ChangeAction:
							ChangeAction(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_SendPublicMessage:
							SendPublicMessage(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_Logout:
							await Logout(PacketUser);
						break;

						case Packets.Client_RequestStatusUpdate:
							UserPresenceBundle(PacketUser);
						break;

						case Packets.Client_StartSpectating:
							Spectator.startSpectatingUser(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_SpectateFrames:
							Spectator.sendSpectatorFrames(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_StopSpectating:
							Spectator.stopSpectatingUser(PacketUser);
						break;

						case Packets.Client_SendPrivateMessage:
							SendPrivateMessage(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_JoinLobby:
							multiplayerManager.userEnterLobby(PacketUser);
						break;

						case Packets.Client_PartLobby:
							multiplayerManager.userLeaveLobby(PacketUser);
						break;

						case Packets.Client_CreateMatch:
							await multiplayerManager.createMultiplayerMatch(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_JoinMatch:
							multiplayerManager.joinMultiplayerMatch(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_MatchChangeSlot:
							PacketUser.currentMatch.moveToSlot(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_MatchReady:
							PacketUser.currentMatch.setStateReady(PacketUser);
						break;

						case Packets.Client_MatchChangeSettings:
							await PacketUser.currentMatch.updateMatch(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_MatchNotReady:
							PacketUser.currentMatch.setStateNotReady(PacketUser);
						break;

						case Packets.Client_PartMatch:
							await multiplayerManager.leaveMultiplayerMatch(PacketUser);
						break;

						// Also handles user kick if the slot has a user
						case Packets.Client_MatchLock:
							PacketUser.currentMatch.lockMatchSlot(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_MatchNoBeatmap:
							PacketUser.currentMatch.missingBeatmap(PacketUser);
						break;

						case Packets.Client_MatchSkipRequest:
							PacketUser.currentMatch.matchSkip(PacketUser);
						break;
						
						case Packets.Client_MatchHasBeatmap:
							PacketUser.currentMatch.notMissingBeatmap(PacketUser);
						break;

						case Packets.Client_MatchTransferHost:
							PacketUser.currentMatch.transferHost(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_MatchChangeMods:
							PacketUser.currentMatch.updateMods(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_MatchStart:
							PacketUser.currentMatch.startMatch();
						break;

						case Packets.Client_MatchLoadComplete:
							PacketUser.currentMatch.matchPlayerLoaded(PacketUser);
						break;

						case Packets.Client_MatchComplete:
							await PacketUser.currentMatch.onPlayerFinishMatch(PacketUser);
						break;

						case Packets.Client_MatchScoreUpdate:
							PacketUser.currentMatch.updatePlayerScore(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_MatchFailed:
							PacketUser.currentMatch.matchFailed(PacketUser);
						break;

						case Packets.Client_MatchChangeTeam:
							PacketUser.currentMatch.changeTeam(PacketUser);
						break;

						case Packets.Client_ChannelJoin:
							ChannelJoin(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_ChannelPart:
							ChannelPart(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_SetAwayMessage:
							SetAwayMessage(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_FriendAdd:
							AddFriend(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_FriendRemove:
							RemoveFriend(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_UserStatsRequest:
							UserStatsRequest(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_SpecialMatchInfoRequest:
							TourneyMatchSpecialInfo(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_SpecialJoinMatchChannel:
							TourneyMatchJoinChannel(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_SpecialLeaveMatchChannel:
							TourneyMatchLeaveChannel(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_Invite:
							MultiplayerInvite(PacketUser, CurrentPacket.data);
						break;

						case Packets.Client_UserPresenceRequest:
							UserPresence(PacketUser, PacketUser.id); // Can't really think of a way to generalize this?
						break;

						default:
							// Ignore client_beatmapInfoRequest and client_receiveUpdates
							if (CurrentPacket.id == 68 || CurrentPacket.id == 79 || CurrentPacket.id == 4) break;
							// Print out unimplemented packet
							console.dir(CurrentPacket);
						break;
					}*/
				}

				responseData = PacketUser.queue;
				PacketUser.clearQueue();
			} else {
				// Only do this if we're absolutely sure that we're connected to the DB
				if (DB.connected) {
					// User's token is invlid, force a reconnect
					ConsoleHelper.printBancho(`Forced client re-login (Token is invalid)`);
					responseData = "\u0005\u0000\u0000\u0004\u0000\u0000\u0000<30><30><EFBFBD><EFBFBD>\u0018\u0000\u0000\u0011\u0000\u0000\u0000\u000b\u000fReconnecting...";
				}
			}
		} catch (e) {
			console.error(e);
		} finally {
			res.writeHead(200, {
				"Connection": "keep-alive",
				"Keep-Alive": "timeout=5, max=100",
			});
			// Send the prepared packet(s) to the client
			res.end(responseData);
		}
	}
}