TF-3294 Fix BLUE-BAR mail to attendees duplicated recipients

lib/features/email/presentation/controller/single_email_controller.dart

@@ -77,6 +77,8 @@ import 'package:tmail_ui_user/features/email/presentation/action/email_ui_action
 import 'package:tmail_ui_user/features/email/presentation/bindings/calendar_event_interactor_bindings.dart';
 import 'package:tmail_ui_user/features/email/presentation/controller/email_supervisor_controller.dart';
 import 'package:tmail_ui_user/features/email/presentation/extensions/attachment_extension.dart';
+import 'package:tmail_ui_user/features/email/presentation/extensions/calendar_attendee_extension.dart';
+import 'package:tmail_ui_user/features/email/presentation/extensions/calendar_organizer_extension.dart';
 import 'package:tmail_ui_user/features/email/presentation/model/blob_calendar_event.dart';
 import 'package:tmail_ui_user/features/email/presentation/model/composer_arguments.dart';
 import 'package:tmail_ui_user/features/email/presentation/model/email_loaded.dart';
@@ -1853,19 +1855,20 @@ class SingleEmailController extends BaseController with AppLoaderMixin {
   }
 
   void handleMailToAttendees(CalendarOrganizer? organizer, List<CalendarAttendee>? attendees) {
-    final listEmailAddressAttendees = attendees
-      ?.map((attendee) => EmailAddress(attendee.name?.name, attendee.mailto?.mailAddress.value))
-      .toList() ?? [];
+    List<EmailAddress> listEmailAddressAttendees = [];
 
     if (organizer != null) {
-      listEmailAddressAttendees.add(EmailAddress(organizer.name, organizer.mailto?.value));
+      listEmailAddressAttendees.add(organizer.toEmailAddress());
     }
 
-    final listEmailAddressMailTo = listEmailAddressAttendees
-      .where((emailAddress) => emailAddress.emailAddress.isNotEmpty && emailAddress.emailAddress != mailboxDashBoardController.sessionCurrent?.username.value)
-      .toSet()
-      .toList();
+    final listEmailAddress = attendees
+        ?.map((attendee) => attendee.toEmailAddress())
+        .toList() ?? [];
 
+    listEmailAddressAttendees.addAll(listEmailAddress);
+
+    final username = mailboxDashBoardController.sessionCurrent?.username.value ?? '';
+    final listEmailAddressMailTo = listEmailAddressAttendees.removeInvalidEmails(username);
     log('SingleEmailController::handleMailToAttendees: listEmailAddressMailTo = $listEmailAddressMailTo');
     mailboxDashBoardController.goToComposer(
       ComposerArguments.fromMailtoUri(listEmailAddress: listEmailAddressMailTo)

lib/features/email/presentation/extensions/calendar_attendee_extension.dart

@@ -0,0 +1,12 @@
+
+import 'package:jmap_dart_client/jmap/mail/calendar/properties/attendee/calendar_attendee.dart';
+import 'package:jmap_dart_client/jmap/mail/email/email_address.dart';
+
+extension CalendarAttendeeExtension on CalendarAttendee {
+  EmailAddress toEmailAddress() {
+    return EmailAddress(
+      name?.name,
+      mailto?.mailAddress.value,
+    );
+  }
+}

lib/features/email/presentation/extensions/calendar_organizer_extension.dart

@@ -0,0 +1,12 @@
+
+import 'package:jmap_dart_client/jmap/mail/calendar/properties/calendar_organizer.dart';
+import 'package:jmap_dart_client/jmap/mail/email/email_address.dart';
+
+extension CalendarOrganizerExtension on CalendarOrganizer {
+  EmailAddress toEmailAddress() {
+    return EmailAddress(
+       name,
+       mailto?.value,
+    );
+  }
+}

model/lib/extensions/list_email_address_extension.dart

@@ -38,4 +38,13 @@ extension SetEmailAddressExtension on Set<EmailAddress>? {
 
 extension ListEmailAddressExtension on List<EmailAddress> {
   Set<String> asSetAddress() => map((emailAddress) => emailAddress.emailAddress).toSet();
+
+  List<EmailAddress> removeInvalidEmails(String username) {
+    final Set<String> seenEmails = {};
+    return where((email) {
+      if (email.emailAddress.isEmpty) return false;
+      if (email.emailAddress == username) return false;
+      return seenEmails.add(email.emailAddress);
+    }).toList();
+  }
 }

model/test/extensions/list_email_address_extension_test.dart

@@ -0,0 +1,71 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:jmap_dart_client/jmap/mail/email/email_address.dart';
+import 'package:model/extensions/email_address_extension.dart';
+import 'package:model/extensions/list_email_address_extension.dart';
+
+void main() {
+  group('ListEmailAddressExtension::removeInvalidEmails::test', () {
+    test('SHOULD remove email addresses that are empty', () {
+      final emails = [
+        EmailAddress('Alice', '[email protected]'),
+        EmailAddress('Bob', ''),
+        EmailAddress('Charlie', '[email protected]'),
+      ];
+
+      final validEmails = emails.removeInvalidEmails('[email protected]');
+
+      expect(validEmails.length, 2);
+      expect(validEmails[0].emailAddress, '[email protected]');
+      expect(validEmails[1].emailAddress, '[email protected]');
+    });
+
+    test('SHOULD remove email addresses that match the provided username', () {
+      final emails = [
+        EmailAddress('Alice', '[email protected]'),
+        EmailAddress('Bob', '[email protected]'),
+        EmailAddress('Charlie', '[email protected]'),
+      ];
+
+      final validEmails = emails.removeInvalidEmails('[email protected]');
+
+      expect(validEmails.length, 2);
+      expect(validEmails[0].emailAddress, '[email protected]');
+      expect(validEmails[1].emailAddress, '[email protected]');
+    });
+
+    test('SHOULD remove duplicate email addresses, keeping only the first occurrence', () {
+      final emails = [
+        EmailAddress('Alice', '[email protected]'),
+        EmailAddress('Bob', '[email protected]'),
+        EmailAddress('Charlie', '[email protected]'),
+        EmailAddress('David', '[email protected]'),
+      ];
+
+      final validEmails = emails.removeInvalidEmails('[email protected]');
+
+      expect(validEmails.length, 2);
+      expect(validEmails[0].emailAddress, '[email protected]');
+      expect(validEmails[1].emailAddress, '[email protected]');
+    });
+
+    test('SHOULD return an empty list if all email addresses are invalid', () {
+      final emails = [
+        EmailAddress('Alice', ''),
+        EmailAddress('Bob', '[email protected]'),
+        EmailAddress('Charlie', '[email protected]'),
+      ];
+
+      final validEmails = emails.removeInvalidEmails('[email protected]');
+
+      expect(validEmails.isEmpty, true);
+    });
+
+    test('SHOULD return an empty list for an empty input list', () {
+      final emails = <EmailAddress>[];
+
+      final validEmails = emails.removeInvalidEmails('[email protected]');
+
+      expect(validEmails.isEmpty, true);
+    });
+  });
+}