✨ make erlpack optional

package.json

@@ -15,7 +15,6 @@
 	"dependencies": {
 		"@fosscord/server-util": "^1.0.7",
 		"dotenv": "^8.2.0",
-		"erlpack": "^0.1.3",
 		"jsonwebtoken": "^8.5.1",
 		"lambert-server": "^1.1.7",
 		"missing-native-js-functions": "^1.2.3",
@@ -29,6 +28,7 @@
 		"@types/jsonwebtoken": "^8.5.0",
 		"@types/mongoose-autopopulate": "^0.10.1",
 		"@types/uuid": "^8.3.0",
-		"@types/ws": "^7.4.0"
+		"@types/ws": "^7.4.0",
+		"erlpack": "^0.1.3"
 	}
 }

src/events/Connection.ts

@@ -6,6 +6,10 @@ import { setHeartbeat } from "../util/setHeartbeat";
 import { Send } from "../util/Send";
 import { CLOSECODES, OPCODES } from "../util/Constants";
 import { createDeflate } from "zlib";
+var erlpack: any;
+try {
+	erlpack = require("erlpack");
+} catch (error) {}
 
 // TODO: check rate limit
 // TODO: specify rate limit in config
@@ -19,7 +23,10 @@ export async function Connection(this: Server, socket: WebSocket, request: Incom
 		const { searchParams } = new URL(`http://localhost${request.url}`);
 		// @ts-ignore
 		socket.encoding = searchParams.get("encoding") || "json";
-		if (!["json", "etf"].includes(socket.encoding)) return socket.close(CLOSECODES.Decode_error);
+		if (!["json", "etf"].includes(socket.encoding)) {
+			if (socket.encoding === "etf" && erlpack) throw new Error("Erlpack is not installed: 'npm i -D erlpack'");
+			return socket.close(CLOSECODES.Decode_error);
+		}
 
 		// @ts-ignore
 		socket.version = Number(searchParams.get("version")) || 8;

src/events/Message.ts

@@ -1,5 +1,8 @@
 import WebSocket, { Data } from "../util/WebSocket";
-import erlpack from "erlpack";
+var erlpack: any;
+try {
+	erlpack = require("erlpack");
+} catch (error) {}
 import OPCodeHandlers from "../opcodes";
 import { Payload, CLOSECODES } from "../util/Constants";
 import { instanceOf, Tuple } from "lambert-server";

src/util/Send.ts

@@ -1,7 +1,8 @@
-import erlpack from "erlpack";
-import { promisify } from "util";
+var erlpack: any;
+try {
+	erlpack = require("erlpack");
+} catch (error) {}
 import { Payload } from "../util/Constants";
-import { deflateSync } from "zlib";
 
 import WebSocket from "./WebSocket";