Renamed all Timer named things to TimeProgress

Signed-off-by: Andreas Fahrecker <AndreasFahrecker@gmail.com>

lib/models/time_progress.dart

@@ -0,0 +1,50 @@
+import 'package:meta/meta.dart';
+import 'package:time_progress_calculator/persistence/time_progress_entity.dart';
+import 'package:time_progress_calculator/uuid.dart';
+
+@immutable
+class TimeProgress {
+  final String id;
+  final DateTime startTime;
+  final DateTime endTime;
+
+  TimeProgress(this.startTime, this.endTime, {String id})
+      : id = id ?? Uuid().generateV4();
+
+  TimeProgress copyWith({String id, DateTime startTime, DateTime endTime}) {
+    return TimeProgress(
+      startTime ?? this.startTime,
+      endTime ?? this.endTime,
+      id: id ?? this.id,
+    );
+  }
+
+  @override
+  int get hashCode => id.hashCode ^ startTime.hashCode ^ endTime.hashCode;
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is TimeProgress &&
+          runtimeType == other.runtimeType &&
+          id == other.id &&
+          startTime == other.startTime &&
+          endTime == other.endTime;
+
+  @override
+  String toString() {
+    return "Timer{id: $id, startTimer: $startTime, endTimer: $endTime}";
+  }
+
+  TimeProgressEntity toEntity() {
+    return TimeProgressEntity(id, startTime, endTime);
+  }
+
+  static TimeProgress fromEntity(TimeProgressEntity entity) {
+    return TimeProgress(
+      entity.startTime,
+      entity.endTime,
+      id: entity.id ?? Uuid().generateV4(),
+    );
+  }
+}