service: Implement setting the subscription state of a contact

lib/ui/bloc/profile_bloc.dart

@@ -18,6 +18,7 @@ class ProfileBloc extends Bloc<ProfileEvent, ProfileState> {
     on<ProfilePageRequestedEvent>(_onProfileRequested);
     on<ConversationUpdatedEvent>(_onConversationUpdated);
     on<AvatarSetEvent>(_onAvatarSet);
+    on<SetSubscriptionStateEvent>(_onSetSubscriptionState);
   }
 
   Future<void> _onProfileRequested(ProfilePageRequestedEvent event, Emitter<ProfileState> emit) async {
@@ -71,4 +72,13 @@ class ProfileBloc extends Bloc<ProfileEvent, ProfileState> {
       awaitable: false
     );
   }
+
+  Future<void> _onSetSubscriptionState(SetSubscriptionStateEvent event, Emitter<ProfileState> emit) async {
+    // TODO: Maybe already emit the state change to have it instant and debounce it until
+    //       everything else is done
+    GetIt.I.get<BackgroundServiceDataSender>().sendData(
+      SetShareOnlineStatusCommand(jid: event.jid, share: event.shareStatus),
+      awaitable: false
+    );
+  }
 }

lib/ui/bloc/profile_event.dart

@@ -35,3 +35,11 @@ class AvatarSetEvent extends ProfileEvent {
 
   AvatarSetEvent(this.path, this.hash);
 }
+
+/// Triggered by the UI when the subscription state should be set
+class SetSubscriptionStateEvent extends ProfileEvent {
+  final String jid;
+  final bool shareStatus;
+
+  SetSubscriptionStateEvent(this.jid, this.shareStatus);
+}

lib/ui/pages/profile/profile.dart

@@ -50,14 +50,13 @@ class ProfilePage extends StatelessWidget {
                     padding: const EdgeInsets.symmetric(horizontal: 32.0).add(EdgeInsets.only(top: 8.0)),
                     child: SettingsTile.switchTile(
                       title: "Share online status",
-                      // TODO: This
-                      // TODO: Requires that we also store the subscription state in the
-                      //       database.
                       switchValue: state.conversation!.subscription == "to" || state.conversation!.subscription == "both",
                       onToggle: (value) {
-                        GetIt.I.get<BackgroundServiceDataSender>().sendData(
-                          SetShareOnlineStatusCommand(jid: state.conversation!.jid, share: value),
-                          awaitable: false
+                        context.read<ProfileBloc>().add(
+                          SetSubscriptionStateEvent(
+                            state.conversation!.jid,
+                            value
+                          )
                         );
                       }
                     )