TF-3591 Implement CalendarEventCounter/accept method

lib/features/email/domain/extensions/list_event_actions_extension.dart

@@ -0,0 +1,15 @@
+import 'package:jmap_dart_client/jmap/mail/calendar/properties/event_method.dart';
+import 'package:tmail_ui_user/features/email/domain/model/event_action.dart';
+
+extension ListEventActionsExtension on List<EventActionType> {
+  List<EventActionType> validActionsOfEventMethod(EventMethod? eventMethod) {
+    return where((action) {
+      if (eventMethod != EventMethod.counter) {
+        return action != EventActionType.acceptCounter;
+      }
+
+      return action == EventActionType.acceptCounter
+        || action == EventActionType.mailToAttendees;
+    }).toList();
+  }
+}

lib/features/email/domain/model/event_action.dart

@@ -5,6 +5,7 @@ import 'package:tmail_ui_user/main/localizations/app_localizations.dart';
 
 enum EventActionType {
   yes,
+  acceptCounter,
   maybe,
   no,
   mailToAttendees;
@@ -12,6 +13,7 @@ enum EventActionType {
   String getLabelButton(BuildContext context) {
     switch(this) {
       case EventActionType.yes:
+      case EventActionType.acceptCounter:
         return AppLocalizations.of(context).yes;
       case EventActionType.maybe:
         return AppLocalizations.of(context).maybe;
@@ -26,6 +28,8 @@ enum EventActionType {
     switch(this) {
       case EventActionType.yes:
         return AppLocalizations.of(context).youWillAttendThisMeeting;
+      case EventActionType.acceptCounter:
+        return AppLocalizations.of(context).youAcceptedTheProposedTimeForThisMeeting;
       case EventActionType.maybe:
         return AppLocalizations.of(context).youMayAttendThisMeeting;
       case EventActionType.no:

lib/features/email/domain/repository/calendar_event_repository.dart

@@ -28,4 +28,9 @@ abstract class CalendarEventRepository {
   Future<List<BlobCalendarEvent>> transformCalendarEventDescription(
     List<BlobCalendarEvent> blobCalendarEvents,
     TransformConfiguration transformConfiguration);
+
+  Future<CalendarEventAcceptResponse> acceptCounterEvent(
+    AccountId accountId,
+    Set<Id> blobIds,
+  );
 }

lib/features/email/domain/state/calendar_event_counter_accept_state.dart

@@ -0,0 +1,16 @@
+import 'package:core/presentation/state/success.dart';
+import 'package:tmail_ui_user/features/email/domain/model/event_action.dart';
+import 'package:tmail_ui_user/features/email/domain/state/calendar_event_reply_state.dart';
+
+class CalendarEventCounterAccepting extends LoadingState {}
+
+class CalendarEventCounterAccepted extends CalendarEventReplySuccess {
+  CalendarEventCounterAccepted(super.calendarEventAcceptResponse, super.emailId);
+
+  @override
+  EventActionType getEventActionType() => EventActionType.acceptCounter;
+}
+
+class CalendarEventCounterAcceptFailure extends CalendarEventReplyFailure {
+  CalendarEventCounterAcceptFailure({super.exception});
+}

lib/features/email/domain/usecases/calendar_event_counter_accept_interactor.dart

@@ -0,0 +1,29 @@
+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+import 'package:dartz/dartz.dart';
+import 'package:jmap_dart_client/jmap/account_id.dart';
+import 'package:jmap_dart_client/jmap/core/id.dart';
+import 'package:jmap_dart_client/jmap/mail/email/email.dart';
+import 'package:tmail_ui_user/features/email/domain/repository/calendar_event_repository.dart';
+import 'package:tmail_ui_user/features/email/domain/state/calendar_event_counter_accept_state.dart';
+
+class AcceptCounterCalendarEventInteractor {
+  AcceptCounterCalendarEventInteractor(this._calendarEventRepository);
+
+  final CalendarEventRepository _calendarEventRepository;
+
+  Stream<Either<Failure, Success>> execute(
+    AccountId accountId,
+    Set<Id> blobIds,
+    EmailId emailId,
+  ) async* {
+    try {
+      yield Right(CalendarEventCounterAccepting());
+      final result = await _calendarEventRepository
+        .acceptCounterEvent(accountId, blobIds);
+      yield Right(CalendarEventCounterAccepted(result, emailId));
+    } catch (e) {
+      yield Left(CalendarEventCounterAcceptFailure(exception: e));
+    }
+  }
+}