feat: invitations to show the real phone number after accepting the invitation

backend/src/main/java/online/wesal/wesal/dto/InvitationResponse.java

@@ -183,6 +183,7 @@ public class InvitationResponse {
         private Long id;
         private String displayName;
         private String avatar;
+        private String phoneNumber;
         private LocalDateTime joinedAt;
         
         public AttendeeDto() {}
@@ -211,6 +212,14 @@ public class InvitationResponse {
             this.avatar = avatar;
         }
         
+        public String getPhoneNumber() {
+            return phoneNumber;
+        }
+        
+        public void setPhoneNumber(String phoneNumber) {
+            this.phoneNumber = phoneNumber;
+        }
+        
         public LocalDateTime getJoinedAt() {
             return joinedAt;
         }

backend/src/main/java/online/wesal/wesal/service/InvitationService.java

@@ -240,6 +240,7 @@ public class InvitationService {
                 dto.setId(attendee.getUser().getId());
                 dto.setDisplayName(attendee.getUser().getDisplayName());
                 dto.setAvatar(attendee.getUser().getAvatar());
+                dto.setPhoneNumber(attendee.getUser().getPhoneNumber());
                 dto.setJoinedAt(attendee.getJoinedAt());
                 return dto;
             })

frontend/lib/models/invitation_models.dart

@@ -34,11 +34,13 @@ class InvitationCreator {
   final int id;
   final String displayName;
   final String? avatar;
+  final String? phoneNumber;
 
   InvitationCreator({
     required this.id,
     required this.displayName,
     this.avatar,
+    this.phoneNumber,
   });
 
   factory InvitationCreator.fromJson(Map<String, dynamic> json) {
@@ -46,6 +48,7 @@ class InvitationCreator {
       id: json['id'],
       displayName: json['displayName'],
       avatar: json['avatar'],
+      phoneNumber: json['phoneNumber'],
     );
   }
 
@@ -54,6 +57,7 @@ class InvitationCreator {
       'id': id,
       'displayName': displayName,
       'avatar': avatar,
+      'phoneNumber': phoneNumber,
     };
   }
 }
@@ -63,12 +67,14 @@ class InvitationAttendee {
   final String displayName;
   final String? avatar;
   final DateTime joinedAt;
+  final String? phoneNumber;
 
   InvitationAttendee({
     required this.id,
     required this.displayName,
     this.avatar,
     required this.joinedAt,
+    this.phoneNumber,
   });
 
   factory InvitationAttendee.fromJson(Map<String, dynamic> json) {
@@ -77,6 +83,7 @@ class InvitationAttendee {
       displayName: json['displayName'],
       avatar: json['avatar'],
       joinedAt: DateTime.parse(json['joinedAt']),
+      phoneNumber: json['phoneNumber'],
     );
   }
 
@@ -86,6 +93,7 @@ class InvitationAttendee {
       'displayName': displayName,
       'avatar': avatar,
       'joinedAt': joinedAt.toIso8601String(),
+      'phoneNumber': phoneNumber,
     };
   }
 }

frontend/lib/screens/pages/invitation_details_page.dart

@@ -6,8 +6,7 @@ import '../../utils/invitation_utils.dart';
 import '../../widgets/whatsapp_button.dart';
 
 // WhatsApp configuration
-const String _whatsappNumber = 'PHONE_NUMBER';
+const bool _showWhatsappButton = true;
-const bool _showWhatsappButton = true; // Set to false for production
 
 class InvitationDetailsPage extends StatefulWidget {
   final int invitationId;
@@ -545,10 +544,12 @@ class _InvitationDetailsPageState extends State<InvitationDetailsPage> {
                                 ),
                               ),
                               if ((widget.isOwner || _isCurrentlyParticipant) &&
-                                  _showWhatsappButton) ...[
+                                  _showWhatsappButton &&
+                                  _invitationDetails!.creator.phoneNumber != null &&
+                                  _invitationDetails!.creator.phoneNumber!.isNotEmpty) ...[
                                 SizedBox(width: 8),
                                 WhatsAppButton(
-                                  phoneNumber: _whatsappNumber,
+                                  phoneNumber: _invitationDetails!.creator.phoneNumber!,
                                   size: 28,
                                 ),
                               ],
@@ -633,10 +634,12 @@ class _InvitationDetailsPageState extends State<InvitationDetailsPage> {
                                       ),
                                       if ((widget.isOwner ||
                                               _isCurrentlyParticipant) &&
-                                          _showWhatsappButton) ...[
+                                          _showWhatsappButton &&
+                                          attendee.phoneNumber != null &&
+                                          attendee.phoneNumber!.isNotEmpty) ...[
                                         SizedBox(width: 8),
                                         WhatsAppButton(
-                                          phoneNumber: _whatsappNumber,
+                                          phoneNumber: attendee.phoneNumber!,
                                           size: 24,
                                         ),
                                       ],