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import { Payload, WebSocket } from "@fosscord/gateway";
import OPCodeHandlers from "../opcodes";
import { check } from "../opcodes/instanceOf";
import { CloseCodes } from "../util/Constants";
let erlpack: any;
try {
erlpack = require("@yukikaze-bot/erlpack");
} catch (error) {}
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(`[Gateway] 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);
if(process.env.WS_VERBOSE_UNKNOWN) console.log(data);
// 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("[Gateway]", error);
if (!this.CLOSED && this.CLOSING) return this.close(CloseCodes.Unknown_error);
}
}
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