自习室优化ok

2025-11-28 18:01:09 +08:00
parent 57305c5804
commit 54bf2dcee7
38 changed files with 527 additions and 117 deletions
--- a/lib/widgets/room/board/board_manager.dart
+++ b/lib/widgets/room/board/board_manager.dart
@@ -0,0 +1,101 @@
+import 'package:app/global/config.dart';
+import 'package:app/request/api/room_api.dart';
+import 'package:app/request/dto/room/board_token_dto.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_easyloading/flutter_easyloading.dart';
+import 'package:webview_flutter/webview_flutter.dart';
+
+import 'board_dialog.dart';
+
+class BoardManager {
+  BoardManager._();
+
+  static final BoardManager _instance = BoardManager._();
+
+  factory BoardManager() => _instance;
+
+  WebViewController? _webViewController;
+  BoardTokenDto? _boardToken;
+
+  ///获取token
+  Future<void> _fetchToken(int roomId) async {
+    final now = DateTime.now();
+
+    if (_boardToken == null) {
+      EasyLoading.show(status: "开启白板中");
+      _boardToken = await getBoardTokenApi(roomId);
+    } else {
+      //离过期差多少小时
+      int remainSeconds = _boardToken!.expiresAt.difference(now).inSeconds;
+      // 剩余不足 2 小时 = 7200 秒
+      if (remainSeconds <= 7200) {
+        EasyLoading.show(status: "开启白板中");
+        _boardToken = await getBoardTokenApi(roomId);
+      }
+    }
+    EasyLoading.dismiss();
+  }
+
+  ///生成完整 URL
+  /// -[uid] 用户
+  /// -[roomId] 房间id
+  /// -[isTeacher] 是否是老师
+  Future<String> buildUrl({
+    required String uid,
+    required int roomId,
+    required bool isTeacher,
+  }) async {
+    await _fetchToken(roomId);
+
+    Map<String, dynamic> params = {
+      "appid": _boardToken!.whiteboardAppid,
+      "uid": uid,
+      "uuid": _boardToken!.whiteboardUuid,
+      "room_token": _boardToken!.whiteboardToken,
+      "write": isTeacher ? 1 : 0,
+    };
+    String paramStr = params.entries.map((e) => "${e.key}=${e.value}").join("&");
+
+    return "${Config.webUrl}/board?$paramStr";
+  }
+
+  /// 获取全局唯一 WebViewController
+  Future<WebViewController> getController(String url) async {
+    if (_webViewController != null) return _webViewController!;
+
+    _webViewController = WebViewController()
+      ..setJavaScriptMode(JavaScriptMode.unrestricted)
+      ..setNavigationDelegate(
+        // ⭐ 加上加载监听（BoardDialog 再 listen 一次也没关系）
+        NavigationDelegate(
+          onPageStarted: (_) {},
+          onPageFinished: (_) {},
+        ),
+      )
+      ..loadRequest(Uri.parse(url));
+
+    return _webViewController!;
+  }
+
+  ///打开白板
+  /// -[uid] 用户名+id
+  /// -[roomId] 房间id
+  /// -[isTeacher] 是否是老师
+  Future<void> showBoardDialog(
+    BuildContext context, {
+    required String uid,
+    required int roomId,
+    required bool isTeacher,
+  }) async {
+    String url = await buildUrl(
+      uid: uid,
+      roomId: roomId,
+      isTeacher: isTeacher,
+    );
+    final controller = await getController(url);
+    showDialog(
+      context: context,
+      builder: (_) => BoardDialog(controller: controller),
+    );
+  }
+}