Started Porting Progress Creation Screen

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

lib/redux/store_connectors/create_time_progress_store_connector.dart

@@ -0,0 +1,53 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_redux/flutter_redux.dart';
+import 'package:redux/redux.dart';
+import 'package:time_progress_tracker/models/app_settings.dart';
+import 'package:time_progress_tracker/models/time_progress.dart';
+import 'package:time_progress_tracker/redux/actions/time_progress_actions.dart';
+import 'package:time_progress_tracker/redux/app_state.dart';
+import 'package:time_progress_tracker/redux/redux_selectors.dart';
+
+import '../../utils/helper_functions.dart';
+
+class CreateTimeProgressStoreConnector extends StatelessWidget {
+  final Widget Function(BuildContext, CreateTimeProgressViewModel)
+      loadedBuilder;
+
+  CreateTimeProgressStoreConnector({
+    @required this.loadedBuilder,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return StoreConnector<AppState, CreateTimeProgressViewModel>(
+      onInit: loadTimeProgressListIfUnloaded,
+      converter: (store) => CreateTimeProgressViewModel._create(store),
+      builder: (context, CreateTimeProgressViewModel vm) {
+        return loadedBuilder(context, vm);
+      },
+    );
+  }
+}
+
+class CreateTimeProgressViewModel {
+  final TimeProgress defaultProgress;
+
+  final void Function(TimeProgress) addTimeProgress;
+
+  CreateTimeProgressViewModel(
+    this.defaultProgress,
+    this.addTimeProgress,
+  );
+
+  factory CreateTimeProgressViewModel._create(Store<AppState> store) {
+    AppSettings settings = appSettingsSelector(store.state);
+    void _addTimeProgress(TimeProgress tp) {
+      if (TimeProgress.isValid(tp)) store.dispatch(AddTimeProgressAction(tp));
+    }
+
+    return CreateTimeProgressViewModel(
+      TimeProgress.defaultFromDuration(settings.duration),
+      _addTimeProgress,
+    );
+  }
+}