flutter_desktop: connection type, mid commit

Signed-off-by: fufesou <shuanglongchen@yeah.net>

flutter/lib/common/shared_state.dart

@@ -0,0 +1,73 @@
+import 'package:get/get.dart';
+
+import '../consts.dart';
+
+class PrivacyModeState {
+  static String tag(String id) => 'privacy_mode_$id';
+
+  static void init(String id) {
+    final RxBool state = false.obs;
+    Get.put(state, tag: tag(id));
+  }
+
+  static void delete(String id) => Get.delete(tag: tag(id));
+  static RxBool find(String id) => Get.find<RxBool>(tag: tag(id));
+}
+
+class BlockInputState {
+  static String tag(String id) => 'block_input_$id';
+
+  static void init(String id) {
+    final RxBool state = false.obs;
+    Get.put(state, tag: tag(id));
+  }
+
+  static void delete(String id) => Get.delete(tag: tag(id));
+  static RxBool find(String id) => Get.find<RxBool>(tag: tag(id));
+}
+
+class CurrentDisplayState {
+  static String tag(String id) => 'current_display_$id';
+
+  static void init(String id) {
+    final RxInt state = RxInt(0);
+    Get.put(state, tag: tag(id));
+  }
+
+  static void delete(String id) => Get.delete(tag: tag(id));
+  static RxInt find(String id) => Get.find<RxInt>(tag: tag(id));
+}
+
+class ConnectionType {
+  final Rx<String> _secure = kInvalidValueStr.obs;
+  final Rx<String> _direct = kInvalidValueStr.obs;
+
+  Rx<String> get secure => _secure;
+  Rx<String> get direct => _direct;
+
+  void setSecure(bool v) {
+    _secure.value = v ? 'secure' : 'insecure';
+  }
+
+  void setDirect(bool v) {
+    _direct.value = v ? '' : '_relay';
+  }
+
+  bool isValid() {
+    return _secure.value != kInvalidValueStr &&
+        _direct.value != kInvalidValueStr;
+  }
+}
+
+class ConnectionTypeState {
+  static String tag(String id) => 'connection_type_$id';
+
+  static void init(String id) {
+    final ConnectionType collectionType = ConnectionType();
+    Get.put(collectionType, tag: tag(id));
+  }
+
+  static void delete(String id) => Get.delete(tag: tag(id));
+  static ConnectionType find(String id) =>
+      Get.find<ConnectionType>(tag: tag(id));
+}