3 files changed, 201 insertions, 0 deletions
diff --git a/src/gateway/events/Close.ts b/src/gateway/events/Close.ts
new file mode 100644
index 00000000..5b7c512c
--- /dev/null
+++ b/src/gateway/events/Close.ts
@@ -0,0 +1,46 @@
+import { WebSocket } from "@fosscord/gateway";
+import {
+	emitEvent,
+	PresenceUpdateEvent,
+	PrivateSessionProjection,
+	Session,
+	SessionsReplace,
+	User,
+} from "@fosscord/util";
+
+export async function Close(this: WebSocket, code: number, reason: string) {
+	console.log("[WebSocket] closed", code, reason);
+	if (this.heartbeatTimeout) clearTimeout(this.heartbeatTimeout);
+	if (this.readyTimeout) clearTimeout(this.readyTimeout);
+	this.deflate?.close();
+	this.removeAllListeners();
+
+	if (this.session_id) {
+		await Session.delete({ session_id: this.session_id });
+		const sessions = await Session.find({
+			where: { user_id: this.user_id },
+			select: PrivateSessionProjection,
+		});
+		await emitEvent({
+			event: "SESSIONS_REPLACE",
+			user_id: this.user_id,
+			data: sessions,
+		} as SessionsReplace);
+		const session = sessions.first() || {
+			activities: [],
+			client_info: {},
+			status: "offline",
+		};
+
+		await emitEvent({
+			event: "PRESENCE_UPDATE",
+			user_id: this.user_id,
+			data: {
+				user: await User.getPublicUser(this.user_id),
+				activities: session.activities,
+				client_status: session?.client_info,
+				status: session.status,
+			},
+		} as PresenceUpdateEvent);
+	}
+}
diff --git a/src/gateway/events/Connection.ts b/src/gateway/events/Connection.ts
new file mode 100644
index 00000000..508b4741
--- /dev/null
+++ b/src/gateway/events/Connection.ts
@@ -0,0 +1,94 @@
+import WS from "ws";
+import { WebSocket } from "@fosscord/gateway";
+import { Send } from "../util/Send";
+import { CLOSECODES, OPCODES } from "../util/Constants";
+import { setHeartbeat } from "../util/Heartbeat";
+import { IncomingMessage } from "http";
+import { Close } from "./Close";
+import { Message } from "./Message";
+import { createDeflate } from "zlib";
+import { URL } from "url";
+let erlpack: any;
+try {
+	erlpack = require("@yukikaze-bot/erlpack");
+} catch (error) {}
+
+// TODO: check rate limit
+// TODO: specify rate limit in config
+// TODO: check msg max size
+
+export async function Connection(
+	this: WS.Server,
+	socket: WebSocket,
+	request: IncomingMessage
+) {
+	try {
+		// @ts-ignore
+		socket.on("close", Close);
+		// @ts-ignore
+		socket.on("message", Message);
+		
+		if(process.env.WS_LOGEVENTS)
+		[
+			"close",
+			"error",
+			"upgrade",
+			//"message",
+			"open",
+			"ping",
+			"pong",
+			"unexpected-response"
+		].forEach(x=>{
+			socket.on(x, y => console.log(x, y));
+		});
+
+		console.log(`[Gateway] Connections: ${this.clients.size}`);
+
+		const { searchParams } = new URL(`http://localhost${request.url}`);
+		// @ts-ignore
+		socket.encoding = searchParams.get("encoding") || "json";
+		if (!["json", "etf"].includes(socket.encoding)) {
+			if (socket.encoding === "etf" && erlpack) {
+				throw new Error(
+					"Erlpack is not installed: 'npm i @yukikaze-bot/erlpack'"
+				);
+			}
+			return socket.close(CLOSECODES.Decode_error);
+		}
+
+		// @ts-ignore
+		socket.version = Number(searchParams.get("version")) || 8;
+		if (socket.version != 8)
+			return socket.close(CLOSECODES.Invalid_API_version);
+
+		// @ts-ignore
+		socket.compress = searchParams.get("compress") || "";
+		if (socket.compress) {
+			if (socket.compress !== "zlib-stream")
+				return socket.close(CLOSECODES.Decode_error);
+			socket.deflate = createDeflate({ chunkSize: 65535 });
+			socket.deflate.on("data", (chunk) => socket.send(chunk));
+		}
+
+		socket.events = {};
+		socket.member_events = {};
+		socket.permissions = {};
+		socket.sequence = 0;
+
+		setHeartbeat(socket);
+
+		await Send(socket, {
+			op: OPCODES.Hello,
+			d: {
+				heartbeat_interval: 1000 * 30,
+			},
+		});
+
+		socket.readyTimeout = setTimeout(() => {
+			return socket.close(CLOSECODES.Session_timed_out);
+		}, 1000 * 30);
+	} catch (error) {
+		console.error(error);
+		return socket.close(CLOSECODES.Unknown_error);
+	}
+}
diff --git a/src/gateway/events/Message.ts b/src/gateway/events/Message.ts
new file mode 100644
index 00000000..569f5fc7
--- /dev/null
+++ b/src/gateway/events/Message.ts
@@ -0,0 +1,61 @@
+import { CLOSECODES } from "../util/Constants";
+import { WebSocket, Payload } from "@fosscord/gateway";
+let erlpack: any;
+try {
+	erlpack = require("@yukikaze-bot/erlpack");
+} catch (error) {}
+import OPCodeHandlers from "../opcodes";
+import { check } from "../opcodes/instanceOf";
+
+const PayloadSchema = {
+	op: Number,
+	$d: Object || Number, // or number for heartbeat sequence
+	$s: Number,
+	$t: String,
+};
+
+export async function Message(this: WebSocket, buffer: Buffer) {
+	// TODO: compression
+	let data: Payload;
+
+	if (this.encoding === "etf" && buffer instanceof Buffer)
+		data = erlpack.unpack(buffer);
+	else if (this.encoding === "json")
+		data = JSON.parse(buffer as unknown as string); //TODO: is this even correct?? seems to work for web clients...
+	else if(/--debug|--inspect/.test(process.execArgv.join(' '))) {
+		debugger;
+		return;
+	}
+	else {
+		console.log("Invalid gateway connection! Use a debugger to inspect!");
+		return;
+	}
+
+	if(process.env.WS_VERBOSE)
+		console.log(`[Websocket] Incomming message: ${JSON.stringify(data)}`);
+	if(data.op !== 1)
+		check.call(this, PayloadSchema, data);
+	else { //custom validation for numbers, because heartbeat
+		if(data.s || data.t || (typeof data.d !== "number" && data.d)) {
+			console.log("Invalid heartbeat...");
+			this.close(CLOSECODES.Decode_error);
+		}
+	}
+
+	// @ts-ignore
+	const OPCodeHandler = OPCodeHandlers[data.op];
+	if (!OPCodeHandler) {
+		console.error("[Gateway] Unkown opcode " + data.op);
+		// TODO: if all opcodes are implemented comment this out:
+		// this.close(CLOSECODES.Unknown_opcode);
+		return;
+	}
+
+	try {
+		return await OPCodeHandler.call(this, data);
+	} catch (error) {
+		console.error(error);
+		if (!this.CLOSED && this.CLOSING)
+			return this.close(CLOSECODES.Unknown_error);
+	}
+}