优化了老师端的等待状态判断逻辑

lib/pages/student/room/video/teacher_video.dart

@@ -1,4 +1,8 @@
+import 'package:agora_rtc_engine/agora_rtc_engine.dart';
 import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+
+import '../viewmodel/stu_room_vm.dart';
 
 class TeacherVideo extends StatefulWidget {
   const TeacherVideo({super.key});
@@ -10,10 +14,44 @@ class TeacherVideo extends StatefulWidget {
 class _TeacherVideoState extends State<TeacherVideo> {
   @override
   Widget build(BuildContext context) {
+    final vm = context.read<StuRoomVM>();
+    final teacherInfo = vm.teacherInfo;
+
+    ///没开始
+    if (vm.roomStatus == 0) {
+      return _empty("自习室还没开始");
+    }
+
+    ///开始
+    if (vm.roomStatus == 1 && vm.engine != null) {
+      if (teacherInfo == null) {
+        return _empty("老师不在自习室内");
+      }
+      if (teacherInfo.online == 0) {
+        return _empty("老师掉线了，请耐心等待");
+      }
+      return AgoraVideoView(
+        controller: VideoViewController(
+          rtcEngine: vm.engine!,
+          canvas: VideoCanvas(
+            uid: vm.teacherInfo!.userId,
+          ),
+        ),
+      );
+    }
+
+    ///结束
+    if (vm.roomStatus == 2) {
+      return _empty("自习室已结束");
+    }
+    return _empty("加载中");
+  }
+
+  Widget _empty(String title) {
     return SafeArea(
       child: Align(
         child: Text(
-          "画面准备中",
+          title,
           style: TextStyle(color: Colors.white),
         ),
       ),

lib/pages/student/room/viewmodel/stu_room_vm.dart

@@ -1,5 +1,7 @@
 import 'dart:async';
 
+import 'package:agora_rtc_engine/agora_rtc_engine.dart';
+import 'package:app/config/config.dart';
 import 'package:app/providers/user_store.dart';
 import 'package:app/request/dto/room/room_info_dto.dart';
 import 'package:app/request/dto/room/room_type_dto.dart';
@@ -36,12 +38,48 @@ class StuRoomVM extends ChangeNotifier {
   final RoomWebSocket _ws = RoomWebSocket();
   StreamSubscription<RoomMessage>? _sub;
 
-  RtcTokenDto? get rtcToken => _ws.rtcToken;
+  /// 声网sdk管理
+  RtcEngine? _engine;
+
+  RtcEngine? get engine => _engine;
 
   StuRoomVM({required this.roomInfo, required this.uid}) {
     _startRoom();
   }
 
+  ///初始化声网
+  Future<void> _initRtc() async {
+    _engine = createAgoraRtcEngine();
+    //初始化 RtcEngine，设置频道场景为 channelProfileLiveBroadcasting（直播场景）
+    await _engine!.initialize(
+      RtcEngineContext(
+        appId: Config.swAppId,
+        channelProfile: ChannelProfileType.channelProfileCommunication,
+      ),
+    );
+    //启动视频模块
+    await _engine!.enableVideo();
+    //加入频道
+    await _engine!.joinChannel(
+      token: _ws.rtcToken!.token,
+      channelId: _ws.rtcToken!.channel,
+      uid: uid,
+      // uid: _ws.rtcToken!.uid,
+      options: ChannelMediaOptions(
+        // 自动订阅所有视频流
+        autoSubscribeVideo: true,
+        // 自动订阅所有音频流
+        autoSubscribeAudio: true,
+        // 发布摄像头采集的视频
+        publishCameraTrack: true,
+        // 发布麦克风采集的音频
+        publishMicrophoneTrack: true,
+        // 设置用户角色为 clientRoleBroadcaster（主播）或 clientRoleAudience（观众）
+        clientRoleType: ClientRoleType.clientRoleBroadcaster,
+      ),
+    );
+  }
+
   ///开始链接房间
   Future<void> _startRoom() async {
     //如果socket的token没有，先初始化