离线给 html 准备数据

lib/pages/read_web/controller.dart

@@ -743,6 +743,89 @@ class ReadController extends FullLifeCycleController with GetSingleTickerProvide
     queryLocalNote();
   }
 
+  // 获取离线数据
+  void getOffLineInfo() async {
+
+    Map<String, dynamic> data = {};
+    data['chapter_name'] = chapterName;
+    // 1、根据当前章节id名称 获取内容
+    String toReadHtmlPath = await getLocalReadHtml(chapterId);
+    // 2、获取 离线文件的内容
+    final enCodeContent = await readHtmlFileContent(toReadHtmlPath);
+    // 3、解密离线的内容
+    String deCodeContent = EncryptUtil.aesDecrypt(enCodeContent!);
+    data['content'] = deCodeContent;
+    // 4、获取上一章节信息
+    Map<String, dynamic> upChapter = {};
+    final upId = await getChapterId(type: 0);
+    if(upId.isEmpty) {
+      data['up_chapter'] = '';
+    }
+    else{
+      String upName =  getChapterName(upId);
+      upChapter['name'] = upName;
+      upChapter['id'] = int.parse(upId);
+    }
+    // 5、获取下一章节信息
+    Map<String, dynamic> nextChapter = {};
+    final nextId = await getChapterId(type: 1);
+    if(nextId.isEmpty) {
+      data['next_chapter'] = '';
+    }
+    else{
+      String nextName =  getChapterName(upId);
+      nextChapter['name'] = nextName;
+      nextChapter['id'] = int.parse(nextId);
+    }
+    // 6、获取离线高亮和划线
+    final Map<String, dynamic> temp = await queryNewLocalNote();
+    data.addAll(temp);
+
+    // 7、 给前端参数
+    String jsonStr = jsonEncode(data);
+    webViewController.evaluateJavascript(source: 'offlineCallbackInFlutterComponent($jsonStr)');
+
+  }
+
+  // 获取上一章节或下一章节 id
+  Future<String> getChapterId({required int type}) async{
+    String docPath = await _getDirectory();
+    String filePath = '$docPath/$bookId';
+    Directory directory = Directory(filePath);
+    // 获取目录下的所有文件
+    List<FileSystemEntity> files = directory.listSync(recursive: true);
+
+    int findIndex = int.parse(currentHtmlName.split('-').first);
+    if(type == 0){
+      findIndex--;
+      if(findIndex <0){
+        Toast.show('前面已没有章节');
+        // 已到最前
+        return '';
+      }
+    }
+    else{
+      findIndex++;
+      if(findIndex >files.length -1){
+        // 已到最后
+        return '';
+      }
+    }
+
+    for (var file in files) {
+      if (file is File && file.path.toLowerCase().endsWith('.html')) {
+        String fileName = path.basenameWithoutExtension(file.path);
+        if (int.parse(fileName.split('-').first) == findIndex){
+          Console.log('HTML File--------------------------------${file.path}');
+          String chapterId = fileName.split('-').last;
+          return chapterId;
+        }
+      }
+    }
+
+    return '';
+  }
+
   // 本地阅读 读取上一章节 或 下一章节
   // 0 上一章节
   // 1 下一章节
@@ -828,6 +911,11 @@ class ReadController extends FullLifeCycleController with GetSingleTickerProvide
     return '';
   }
 
+  Future<Map<String,dynamic>> queryNewLocalNote() async {
+    final result = await SqlManager.queryLocalNote(bookId: int.parse(bookId), chapterId: int.parse(chapterId));
+    return result;
+  }
+
   // 查询本地划线高亮笔记
   void queryLocalNote() async {
     final result = await SqlManager.queryLocalNote(bookId: int.parse(bookId), chapterId: int.parse(chapterId));