feat: add ws option support for "buildIdentifyThrottler" (#9728)

* feat: add option support for "buildIdentifyThrottler"

* docs: add documentation for buildIdentifyThrottler

* docs: fix example code

packages/discord.js/src/client/websocket/WebSocketManager.js

@@ -155,6 +155,7 @@ class WebSocketManager extends EventEmitter {
         },
         compression: zlib ? CompressionMethod.ZlibStream : null,
       };
+      if (ws.buildIdentifyThrottler) wsOptions.buildIdentifyThrottler = ws.buildIdentifyThrottler;
       if (ws.buildStrategy) wsOptions.buildStrategy = ws.buildStrategy;
       this._ws = new WSWebSocketManager(wsOptions);
       this.attachEvents();

packages/discord.js/src/util/Options.js

@@ -67,6 +67,19 @@ const { version } = require('../../package.json');
  * @returns {IShardingStrategy} The strategy to use for sharding
  */
 
+/**
+ * A function to change the concurrency handling for shard identifies of this manager
+ * ```js
+ * async (manager) => {
+ *   const gateway = await manager.fetchGatewayInformation();
+ *   return new SimpleIdentifyThrottler(gateway.session_start_limit.max_concurrency);
+ * }
+ * ```
+ * @typedef {Function} IdentifyThrottlerFunction
+ * @param {WSWebSocketManager} manager The WebSocketManager that is going to initiate the sharding
+ * @returns {Awaitable<IIdentifyThrottler>} The identify throttler that this ws manager will use
+ */
+
 /**
  * WebSocket options (these are left as snake_case to match the API)
  * @typedef {Object} WebsocketOptions
@@ -75,6 +88,7 @@ const { version } = require('../../package.json');
  * @property {number} [version=10] The Discord gateway version to use <warn>Changing this can break the library;
  * only set this if you know what you are doing</warn>
  * @property {BuildStrategyFunction} [buildStrategy] Builds the strategy to use for sharding
+ * @property {IdentifyThrottlerFunction} [buildIdentifyThrottler] Builds the identify throttler to use for sharding
  */
 
 /**
@@ -214,3 +228,8 @@ module.exports = Options;
  * @external IShardingStrategy
  * @see {@link https://discord.js.org/docs/packages/ws/stable/IShardingStrategy:Interface}
  */
+
+/**
+ * @external IIdentifyThrottler
+ * @see {@link https://discord.js.org/docs/packages/ws/stable/IIdentifyThrottler:Interface}
+ */

packages/discord.js/typings/index.d.ts

@@ -40,7 +40,12 @@ import {
 import { Awaitable, JSONEncodable } from '@discordjs/util';
 import { Collection } from '@discordjs/collection';
 import { BaseImageURLOptions, ImageURLOptions, RawFile, REST, RESTOptions } from '@discordjs/rest';
-import { WebSocketManager as WSWebSocketManager, IShardingStrategy, SessionInfo } from '@discordjs/ws';
+import {
+  WebSocketManager as WSWebSocketManager,
+  IShardingStrategy,
+  IIdentifyThrottler,
+  SessionInfo,
+} from '@discordjs/ws';
 import {
   APIActionRowComponent,
   APIApplicationCommandInteractionData,
@@ -6388,6 +6393,7 @@ export interface WebSocketOptions {
   large_threshold?: number;
   version?: number;
   buildStrategy?(manager: WSWebSocketManager): IShardingStrategy;
+  buildIdentifyThrottler?(manager: WSWebSocketManager): Awaitable<IIdentifyThrottler>;
 }
 
 export interface WidgetActivity {