platform conditional code refactoring

lib/log/log.dart

@@ -85,10 +85,11 @@ class Log {
   static String? path;
   int index = 0;
   StringBuffer buffer = StringBuffer();
+  final LogWriter _writer = LogWriter();
   Log._privateConstructor() {
     initializeLog();
   }
-  static late Log _instance = Log._privateConstructor();
+  static Log _instance = Log._privateConstructor();
   static Log get to => _instance;
 
   final List<LogItem> logs = [];
@@ -108,7 +109,7 @@ class Log {
       }
     }
     if (path != null && path!.isNotEmpty) {
-      startLogWriter(path!, _onWriterEvent);
+      _writer.start(path!, _onWriterEvent);
     }
   }
 
@@ -127,7 +128,7 @@ class Log {
         buffer.writeln(logs[i].toString());
       }
       index = logs.length;
-      writeLogWriter(buffer.toString());
+      _writer.write(buffer.toString());
       buffer.clear();
     }
   }
@@ -148,6 +149,6 @@ class Log {
 
   void end() {
     write();
-    endLogWriter();
+    _writer.end();
   }
 }

lib/log/log_writer_io.dart

@@ -1,12 +1,14 @@
 import 'dart:io';
 
+import 'package:dart_framework/platform/platform_base.dart';
 import 'package:path/path.dart' as path;
 
 import 'package:dart_framework/platform/isolate_manager.dart';
 import 'package:dart_framework/utils/string_util.dart';
 import 'package:dart_framework/data/isolate_data.dart';
 
-class LogWriterIO extends IsolateBase {
+class LogWriterIO extends IsolateBase implements LogWriter {
+  late int _id;
   late File _file;
   @override
   void onReady(Object? initData) async {
@@ -18,7 +20,7 @@ class LogWriterIO extends IsolateBase {
         await _file.create();
         print('[LogWriterIO] onReady - path: ${_file.path}');
         send(IsoMessege('ready', message: _file.path));
-        addEventListener('write', write);
+        addEventListener('write', onWrite);
         requester();
       }
     }
@@ -31,26 +33,29 @@ class LogWriterIO extends IsolateBase {
     }
   }
 
-  void write(Object? message) {
+  void onWrite(Object? message) {
     // print('write in file: $message');
     _file.writeAsStringSync(message as String, mode: FileMode.append);
   }
+
+  @override
+  void start(String path, Function(IsoMessege) isoMessageListener) {
+    IsolateManager.create<LogWriterIO>(LogWriterIO(), path, (event, data) {
+      if (event == IsolateEvent.ready) {
+        _id = data as int;
+      }
+    }, isoMessageListener);
+  }
+
+  @override
+  void write(String log) {
+    IsolateManager.send(_id, IsoMessege('write', message: log));
+  }
+
+  @override
+  void end() {
+    IsolateManager.exit(_id);
+  }
 }
 
-int _id = 0;
-
-void startLog(String path, Function(IsoMessege) listener) {
-  IsolateManager.create<LogWriterIO>(LogWriterIO(), path, (event, data) {
-    if (event == IsolateEvent.ready) {
-      _id = data as int;
-    }
-  }, listener);
-}
-
-void writeLog(String log) {
-  IsolateManager.send(_id, IsoMessege('write', message: log));
-}
-
-void endLog() {
-  IsolateManager.exit(_id);
-}
+LogWriter getLogWriter() => LogWriterIO();

lib/platform/platform_base.dart

@@ -3,14 +3,10 @@ import 'package:dart_framework/platform/platform_stub.dart'
     if (dart.library.io) 'package:dart_framework/log/log_writer_io.dart'
     if (dart.library.html) 'package:dart_framework/log/log_writer_web.dart';
 
-void startLogWriter(String path, Function(IsoMessege) listener) {
-  startLog(path, listener);
-}
+abstract class LogWriter {
+  factory LogWriter() => getLogWriter();
 
-void writeLogWriter(String log) {
-  writeLog(log);
-}
-
-void endLogWriter() {
-  endLog();
+  void start(String path, Function(IsoMessege) isoMessageListener);
+  void write(String log);
+  void end();
 }

lib/platform/platform_stub.dart

@@ -1,8 +1,3 @@
 import 'package:dart_framework/platform/platform_base.dart';
-import 'package:dart_framework/data/isolate_data.dart';
 
-void startLog(String path, Function(IsoMessege) listener) {}
-
-void writeLog(String log) {}
-
-void endLog() {}
+LogWriter getLogWriter() => throw UnsupportedError('Cannot create a instance');