set refresh changes

Presence.Api/Controllers/GroupController.cs

@@ -1,4 +1,5 @@
-using domain.Service;
+using domain.Request;
+using domain.Service;
 using domain.UseCase;
 using Microsoft.AspNetCore.Mvc;
 using Presence.Api.Response;
@@ -33,5 +34,12 @@ namespace Presence.Api.Controllers
             return Ok(result);
 
         }
+
+        [HttpPost("/admin/{groupId}/students")]
+        public void AddGroup(int groupId, [FromBody] AddGroupRequest addGroupRequest)
+        {
+            Console.WriteLine(groupId);
+            _groupService.AddGroup(addGroupRequest);
+        }
     }
 }

Presence.Desktop/ViewModels/GroupViewModel.cs

@@ -25,12 +25,38 @@ namespace Presence.Desktop.ViewModels
         private GroupPresenter? _selectedGroupItem;
 
 
-
+        private IGroupUseCase _groupUseCase;
         public ObservableCollection<UserPresenter> Users { get => _users;}
         public ObservableCollection<UserPresenter> _users;
         public GroupViewModel(IGroupUseCase groupUseCase)
         {
-            foreach (var item in groupUseCase.GetGroupsWithStudents())
+            _groupUseCase = groupUseCase;
+            _users = new ObservableCollection<UserPresenter>();
+            RefreshGroups();
+            this.WhenAnyValue(vm => vm.SelectedGroupItem)
+                .Subscribe(_ =>
+                {   RefreshGroups();
+                    SetUsers();
+                });
+
+        }
+
+        private void SetUsers()
+        {
+            if(SelectedGroupItem == null) return;
+            Users.Clear();
+            var group = _groups.First(it => it.Id == SelectedGroupItem.Id);
+            if(group.users == null) return;
+            foreach (var item in group.users)
+            {
+                Users.Add(item);
+            }
+        }
+
+        private void RefreshGroups()
+        {
+            _groupPresentersDataSource.Clear();
+            foreach (var item in _groupUseCase.GetGroupsWithStudents())
             {
                 GroupPresenter groupPresenter = new GroupPresenter
                 {
@@ -47,25 +73,7 @@ namespace Presence.Desktop.ViewModels
                 _groupPresentersDataSource.Add(groupPresenter);
             }
             _groups = new ObservableCollection<GroupPresenter>(_groupPresentersDataSource);
-            
-            _users = new ObservableCollection<UserPresenter>();
-
-            this.WhenAnyValue(vm => vm.SelectedGroupItem)
-                .Subscribe(_ => SetUsers());
-
         }
-
-        private void SetUsers()
-        {
-            if(SelectedGroupItem == null) return;
-            if (SelectedGroupItem.users == null) return;
-            Users.Clear();
-            foreach (var item in SelectedGroupItem.users)
-            {
-                Users.Add(item);
-            }
-        }
-
         public string? UrlPathSegment { get; }
         public IScreen HostScreen { get; }
     }

Presence.Desktop/Views/MainWindow.axaml

@@ -1,4 +1,4 @@
-<Window xmlns="https://github.com/avaloniaui"
+ <Window xmlns="https://github.com/avaloniaui"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:app="clr-namespace:Presence.Desktop"