feat: @discordjs/ws (#8260)

Co-authored-by: Parbez <imranbarbhuiya.fsd@gmail.com>

packages/ws/src/utils/IdentifyThrottler.ts

@@ -0,0 +1,29 @@
+import { setTimeout as sleep } from 'node:timers/promises';
+import type { WebSocketManager } from '../ws/WebSocketManager';
+
+export class IdentifyThrottler {
+	private identifyState = {
+		remaining: 0,
+		resetsAt: Infinity,
+	};
+
+	public constructor(private readonly manager: WebSocketManager) {}
+
+	public async waitForIdentify(): Promise<void> {
+		if (this.identifyState.remaining <= 0) {
+			const diff = this.identifyState.resetsAt - Date.now();
+			if (diff <= 5_000) {
+				const time = diff + Math.random() * 1_500;
+				await sleep(time);
+			}
+
+			const info = await this.manager.fetchGatewayInformation();
+			this.identifyState = {
+				remaining: info.session_start_limit.max_concurrency,
+				resetsAt: Date.now() + 5_000,
+			};
+		}
+
+		this.identifyState.remaining--;
+	}
+}