- Introduction on base view model and stateless widget classes

- Implementation of firebase
- Implementation of dependency injection

Took 11 hours 26 minutes

lib/services/DialogService.dart

@@ -0,0 +1,54 @@
+import 'dart:async';
+
+import 'package:flutter/cupertino.dart';
+import 'package:days_left/model/DialogModels.dart';
+
+class DialogService {
+  GlobalKey<NavigatorState> _dialogNavigationKey = GlobalKey<NavigatorState>();
+  Function(DialogRequest) _showDialogListener;
+  Completer<DialogResponse> _dialogCompleter;
+
+  GlobalKey<NavigatorState> get dialogNavigationKey => _dialogNavigationKey;
+
+  /// Registers a callback function. Typically to show the dialog
+  void registerDialogListener(Function(DialogRequest) showDialogListener) {
+    _showDialogListener = showDialogListener;
+  }
+
+  /// Calls the dialog listener and returns a Future that will wait for dialogComplete.
+  Future<DialogResponse> showDialog({
+    String title,
+    String description,
+    String buttonTitle = 'Ok',
+  }) {
+    _dialogCompleter = Completer<DialogResponse>();
+    _showDialogListener(DialogRequest(
+      title: title,
+      description: description,
+      buttonTitle: buttonTitle,
+    ));
+    return _dialogCompleter.future;
+  }
+
+  /// Shows a confirmation dialog
+  Future<DialogResponse> showConfirmationDialog(
+      {String title,
+        String description,
+        String confirmationTitle = 'Ok',
+        String cancelTitle = 'Cancel'}) {
+    _dialogCompleter = Completer<DialogResponse>();
+    _showDialogListener(DialogRequest(
+        title: title,
+        description: description,
+        buttonTitle: confirmationTitle,
+        cancelTitle: cancelTitle));
+    return _dialogCompleter.future;
+  }
+
+  /// Completes the _dialogCompleter to resume the Future's execution call
+  void dialogComplete(DialogResponse response) {
+    _dialogNavigationKey.currentState.pop();
+    _dialogCompleter.complete(response);
+    _dialogCompleter = null;
+  }
+}