feat: add idle timeout setting to auto-disconnect bot when channel is empty

src/bot/instance.ts

@@ -60,6 +60,8 @@ export class BotInstance extends EventEmitter {
   private disconnectEmitted = false;
   private voteSkipUsers = new Set<string>();
   private isAdvancing = false;
+  private idleTimer: ReturnType<typeof setTimeout> | null = null;
+  private channelUserCount = 0;
 
   constructor(options: BotInstanceOptions) {
     super();
@@ -121,6 +123,10 @@ export class BotInstance extends EventEmitter {
       this.disconnectEmitted = true;
       this.emit("disconnected");
     });
+
+    this.tsClient.on("connected", () => {
+      this._startIdlePoller();
+    });
   }
 
   async connect(): Promise<void> {
@@ -138,6 +144,7 @@ export class BotInstance extends EventEmitter {
   }
 
   disconnect(): void {
+    this._cancelIdleTimer();
     this.player.stop();
     this.connected = false;
     if (!this.disconnectEmitted) {
@@ -147,6 +154,48 @@ export class BotInstance extends EventEmitter {
     this.tsClient.disconnect();
   }
 
+  /** 外部更新 idleTimeoutMinutes（由 API 保存时调用） */
+  updateIdleTimeout(minutes: number): void {
+    this.config.idleTimeoutMinutes = minutes;
+    if (minutes === 0) this._cancelIdleTimer();
+  }
+
+  private _startIdlePoller(): void {
+    // 每 30 秒检查一次频道人数
+    const poll = async () => {
+      if (!this.connected) return;
+      try {
+        const clients = await this.tsClient.getClientsInChannel();
+        const userCount = clients.length - 1; // 排除 bot 自身
+        if (userCount <= 0) {
+          this._scheduleIdleCheck();
+        } else {
+          this._cancelIdleTimer();
+        }
+      } catch { /* ignore */ }
+      setTimeout(poll, 30_000);
+    };
+    setTimeout(poll, 30_000);
+  }
+
+  private _scheduleIdleCheck(): void {
+    if (this.idleTimer !== null) return; // 已经在倒计时，不重复创建
+    const minutes = this.config.idleTimeoutMinutes ?? 0;
+    if (!this.connected || minutes <= 0) return;
+    this.idleTimer = setTimeout(() => {
+      if (!this.connected) return;
+      this.logger.info({ idleMinutes: minutes }, "Channel empty, disconnecting due to idle timeout");
+      this.disconnect();
+    }, minutes * 60 * 1000);
+  }
+
+  private _cancelIdleTimer(): void {
+    if (this.idleTimer) {
+      clearTimeout(this.idleTimer);
+      this.idleTimer = null;
+    }
+  }
+
   private async handleTextMessage(msg: TS3TextMessage): Promise<void> {
     const parsed = parseCommand(
       msg.message,

src/data/config.ts

@@ -13,6 +13,7 @@ export interface BotConfig {
   adminGroups: number[];
   autoReturnDelay: number;
   autoPauseOnEmpty: boolean;
+  idleTimeoutMinutes: number;  
 }
 
 export function getDefaultConfig(): BotConfig {
@@ -28,6 +29,7 @@ export function getDefaultConfig(): BotConfig {
     adminGroups: [],
     autoReturnDelay: 300,
     autoPauseOnEmpty: true,
+    idleTimeoutMinutes: 0,
   };
 }
 

src/index.ts

@@ -71,6 +71,7 @@ async function main() {
     bilibiliProvider,
     database: db,
     config,
+    configPath: CONFIG_PATH,
     logger,
     cookieStore,
     staticDir: STATIC_DIR,

src/web/api/bot.ts

@@ -1,11 +1,13 @@
 import { Router } from "express";
 import type { BotManager } from "../../bot/manager.js";
 import type { BotConfig } from "../../data/config.js";
+import { saveConfig } from "../../data/config.js";
 import type { Logger } from "../../logger.js";
 
 export function createBotRouter(
   botManager: BotManager,
   config: BotConfig,
+  configPath: string,
   logger: Logger
 ): Router {
   const router = Router();
@@ -115,6 +117,27 @@ export function createBotRouter(
       res.status(500).json({ error: (err as Error).message });
     }
   });
+  
+  // GET /api/bot/settings — 读取全局 bot 行为设置
+  router.get("/settings", (_req, res) => {
+    res.json({ idleTimeoutMinutes: config.idleTimeoutMinutes ?? 0 });
+  });
+
+  // POST /api/bot/settings — 保存全局 bot 行为设置
+  router.post("/settings", (req, res) => {
+    const { idleTimeoutMinutes } = req.body;
+    if (typeof idleTimeoutMinutes !== "number" || idleTimeoutMinutes < 0) {
+      res.status(400).json({ error: "idleTimeoutMinutes must be a non-negative number" });
+      return;
+    }
+    config.idleTimeoutMinutes = idleTimeoutMinutes;
+    saveConfig(configPath, config);
+    // 通知所有 bot 实例更新定时器
+    for (const bot of botManager.getAllBots()) {
+      bot.updateIdleTimeout(idleTimeoutMinutes);
+    }
+    res.json({ ok: true });
+  });
 
   return router;
 }

src/web/server.ts

@@ -22,6 +22,7 @@ export interface WebServerOptions {
   bilibiliProvider: MusicProvider;
   database: BotDatabase;
   config: BotConfig;
+  configPath: string;
   logger: Logger;
   cookieStore?: CookieStore;
   staticDir?: string;
@@ -41,7 +42,7 @@ export function createWebServer(options: WebServerOptions): WebServer {
 
   app.use(
     "/api/bot",
-    createBotRouter(options.botManager, options.config, logger)
+    createBotRouter(options.botManager, options.config, options.configPath, logger)
   );
   app.use(
     "/api/music",