优化了老师端的等待状态判断逻辑

lib/pages/teacher/room/widgets/status_view.dart

@@ -1,7 +1,9 @@
 import 'dart:async';
 
 import 'package:app/utils/time.dart';
+import 'package:app/widgets/base/dialog/config_dialog.dart';
 import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
 import 'package:provider/provider.dart';
 
 import 'content_view.dart';
@@ -15,86 +17,97 @@ class StatusView extends StatefulWidget {
 }
 
 class _StatusViewState extends State<StatusView> {
-  ///房间状态
-  RoomStatus status = RoomStatus.loading;
-
-  ///剩余秒
   int _seconds = 0;
   Timer? _timer;
 
-  @override
-  void initState() {
-    super.initState();
-    _init();
-    final vm = context.read<TchRoomVM>();
-    vm.addListener(openRoom);
-  }
-
   @override
   void dispose() {
-    super.dispose();
     _timer?.cancel();
-    _timer = null;
+    super.dispose();
   }
 
-  void _init() {
-    final vm = context.read<TchRoomVM>();
-    //如果房间到点可以开始
-    if (vm.canEnterRoom) {
-      status = RoomStatus.start;
-      // openRoom();
-    } else {
-      status = RoomStatus.waiting;
-      startCountDown();
+  void _startCountDown(DateTime startTime) {
+    // 避免重复计时器
+    if (_timer != null) return;
+
+    final now = DateTime.now();
+    int diff = startTime.difference(now).inSeconds;
+
+    if (diff <= 0) {
+      return;
     }
-  }
-
-  ///开始倒计时
-  void startCountDown() {
-    final vm = context.read<TchRoomVM>();
-    //当前时间
-    DateTime now = DateTime.now();
-    //远端时间
     setState(() {
-      _seconds = parseTime(vm.roomInfo.startTime).difference(now).inSeconds;
+      _seconds = diff;
     });
-    _timer = Timer.periodic(Duration(seconds: 1), (timer) {
+
+    _timer = Timer.periodic(const Duration(seconds: 1), (timer) {
+      if (!mounted) return;
       setState(() {
         _seconds--;
       });
+
       if (_seconds <= 0) {
         _timer?.cancel();
         _timer = null;
-        setState(() {
-          status = RoomStatus.start;
-        });
       }
     });
   }
 
-  ///开启自习室
-  void openRoom() {
-    final vm = context.read<TchRoomVM>();
-    vm.toggleRoom(isOpen: true);
-    vm.removeListener(openRoom);
+  ///开播中返回拦截弹窗
+  void _interceptPop() {
+    showDialog(
+      context: context,
+      builder: (context) {
+        return ConfigDialog(
+          content: "是否退出自习室",
+          onCancel: () {
+            context.pop();
+          },
+          onConfirm: () {
+            context.pop();
+            context.pop();
+          },
+        );
+      },
+    );
   }
 
   @override
   Widget build(BuildContext context) {
-    if (status == RoomStatus.waiting) {
+    final vm = context.watch<TchRoomVM>();
+
+    /// 1. 未加载
+    if (vm.roomStatus == -1) {
+      return const Align(
+        child: Text("加载中", style: TextStyle(color: Colors.white)),
+      );
+    }
+
+    /// 2. 未开始的房间
+    if (vm.roomStatus == 0) {
+      if (vm.canEnterRoom) {
+        // 到时间了 → 自动开播
+        WidgetsBinding.instance.addPostFrameCallback((_) {
+          vm.toggleRoom(isOpen: true);
+        });
+      } else {
+        // 没到时间 → 启动倒计时
+        _startCountDown(parseTime(vm.roomInfo.startTime));
+      }
+
       return Align(
         child: Column(
           mainAxisAlignment: MainAxisAlignment.center,
           children: [
-            Text(
+            const Text(
               "未到开播时间，到点后自动开播",
               style: TextStyle(color: Colors.white),
             ),
             Container(
-              margin: EdgeInsets.symmetric(vertical: 10),
+              margin: const EdgeInsets.symmetric(vertical: 10),
               child: Text(
                 formatSeconds(_seconds),
-                style: TextStyle(
+                style: const TextStyle(
                   color: Colors.white,
                   fontSize: 26,
                   fontWeight: FontWeight.bold,
@@ -104,15 +117,21 @@ class _StatusViewState extends State<StatusView> {
           ],
         ),
       );
-    } else if (status == RoomStatus.start) {
-      return ContentView();
     }
-    return SizedBox();
+
+    /// 3. 已开播
+    if (vm.roomStatus == 1) {
+      return PopScope(
+        canPop: false,
+        onPopInvokedWithResult: (didPop, _) {
+          if (!didPop) {
+            _interceptPop();
+          }
+        },
+        child: const ContentView(),
+      );
+    }
+
+    return const SizedBox();
   }
 }
-
-enum RoomStatus {
-  loading, // 加载中
-  waiting, //房间倒计时等待中
-  start, //房间开始中
-}