Project structure change in progress

lib/entities/timer/timer_entity.class.dart

@@ -0,0 +1,45 @@
+part of '../../main.dart';
+
+class TimerEntity extends Entity {
+  TimerEntity(Map rawData, String webHost) : super(rawData, webHost);
+
+  Duration duration;
+
+  @override
+  void update(Map rawData, String webHost) {
+    super.update(rawData, webHost);
+    String durationSource = "${attributes["duration"]}";
+    if (durationSource != null && durationSource.isNotEmpty) {
+      try {
+        List<String> durationList = durationSource.split(":");
+        if (durationList.length == 1) {
+          duration = Duration(seconds: int.tryParse(durationList[0] ?? 0));
+        } else if (durationList.length == 2) {
+          duration = Duration(
+              hours: int.tryParse(durationList[0]) ?? 0,
+              minutes: int.tryParse(durationList[1]) ?? 0
+          );
+        } else if (durationList.length == 3) {
+          duration = Duration(
+              hours: int.tryParse(durationList[0]) ?? 0,
+              minutes: int.tryParse(durationList[1]) ?? 0,
+              seconds: int.tryParse(durationList[2]) ?? 0
+          );
+        } else {
+          Logger.e("Strange $entityId duration format: $durationSource");
+          duration = Duration(seconds: 0);
+        }
+      } catch (e) {
+        Logger.e("Error parsing duration for $entityId: ${e.toString()}");
+        duration = Duration(seconds: 0);
+      }
+    } else {
+      duration = Duration(seconds: 0);
+    }
+  }
+
+  @override
+  Widget _buildStatePart(BuildContext context) {
+    return TimerState();
+  }
+}

lib/entities/timer/widgets/timer_state.dart

@@ -0,0 +1,65 @@
+part of '../../../main.dart';
+
+class TimerState extends StatefulWidget  {
+  //final bool expanded;
+  //final TextAlign textAlign;
+  //final EdgeInsetsGeometry padding;
+  //final int maxLines;
+
+  const TimerState({Key key}) : super(key: key);
+
+  @override
+  _TimerStateState createState() => _TimerStateState();
+
+}
+
+class _TimerStateState extends State<TimerState> {
+
+  Timer timer;
+  Duration remaining = Duration(seconds: 0);
+
+  void checkState(TimerEntity entity) {
+    if (entity.state == EntityState.active) {
+      //Logger.d("Timer is active");
+      if (timer == null || !timer.isActive) {
+        timer = Timer.periodic(Duration(seconds: 1), (timer) {
+          setState(() {
+            try {
+              int passed = DateTime
+                  .now()
+                  .difference(entity._lastUpdated)
+                  .inSeconds;
+              remaining = Duration(seconds: entity.duration.inSeconds - passed);
+            } catch (e) {
+              Logger.e("Error calculating ${entity.entityId} remaining time: ${e.toString()}");
+              remaining = Duration(seconds: 0);
+            }
+          });
+        });
+      }
+    } else {
+      timer?.cancel();
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    EntityModel model = EntityModel.of(context);
+    TimerEntity entity = model.entityWrapper.entity;
+    checkState(entity);
+    if (entity.state != EntityState.active) {
+      return SimpleEntityState();
+    } else {
+      return SimpleEntityState(
+        customValue: "${remaining.toString().split('.')[0]}",
+      );
+    }
+  }
+
+  @override
+  void dispose() {
+    timer?.cancel();
+    super.dispose();
+  }
+
+}