add default group, use it instead of the root

src/KeyKeeper/PasswordStore/IPassStore.cs

@@ -7,6 +7,7 @@ public interface IPassStore
     bool Locked { get; }
 
     IPassStoreDirectory GetRootDirectory();
+    IPassStoreDirectory? GetGroupByType(byte groupType);
     int GetTotalEntryCount();
     void Unlock(CompositeKey key);
     void Lock();

src/KeyKeeper/PasswordStore/IPassStoreDirectory.cs

@@ -6,4 +6,5 @@ namespace KeyKeeper.PasswordStore;
 public interface IPassStoreDirectory : IEnumerable<PassStoreEntry>
 {
     bool DeleteEntry(Guid id);
+    void AddEntry(PassStoreEntry entry);
 }

src/KeyKeeper/PasswordStore/PassStoreEntryGroup.cs

@@ -64,6 +64,12 @@ public class PassStoreEntryGroup : PassStoreEntry, IPassStoreDirectory
         }
     }
 
+    public void AddEntry(PassStoreEntry entry)
+    {
+        entry.Parent = this;
+        ChildEntries.Add(entry);
+    }
+
     public bool DeleteEntry(Guid id)
     {
         if (ChildEntries == null)

src/KeyKeeper/PasswordStore/PassStoreFileAccessor.cs

@@ -49,6 +49,15 @@ public class PassStoreFileAccessor : IPassStore
         return (IPassStoreDirectory)root!;
     }
 
+    public IPassStoreDirectory? GetGroupByType(byte groupType)
+    {
+        if (Locked)
+            throw new InvalidOperationException();
+        return (root as PassStoreEntryGroup)?.ChildEntries
+            .OfType<PassStoreEntryGroup>()
+            .FirstOrDefault(g => g.GroupType == groupType);
+    }
+
     public int GetTotalEntryCount()
     {
         throw new NotImplementedException();
@@ -252,15 +261,24 @@ public class PassStoreFileAccessor : IPassStore
 
     private PassStoreEntry WriteInitialStoreTree(OuterEncryptionWriter w)
     {
-        PassStoreEntry root =
-            new PassStoreEntryGroup(
-                Guid.NewGuid(),
-                DateTime.UtcNow,
-                DateTime.UtcNow,
-                Guid.Empty,
-                "",
-                GROUP_TYPE_ROOT
-            );
+        PassStoreEntryGroup defaultGroup = new(
+            Guid.NewGuid(),
+            DateTime.UtcNow,
+            DateTime.UtcNow,
+            Guid.Empty,
+            "",
+            GROUP_TYPE_DEFAULT
+        );
+        PassStoreEntryGroup root = new(
+            Guid.NewGuid(),
+            DateTime.UtcNow,
+            DateTime.UtcNow,
+            Guid.Empty,
+            "",
+            GROUP_TYPE_ROOT,
+            [defaultGroup]
+        );
+        defaultGroup.Parent = root;
         root.WriteToStream(w);
         return root;
     }

src/KeyKeeper/ViewModels/RepositoryWindowViewModel.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Threading.Tasks;
 using KeyKeeper.PasswordStore;
+using static KeyKeeper.PasswordStore.FileFormatConstants;
 
 namespace KeyKeeper.ViewModels;
 
@@ -33,7 +34,9 @@ public partial class RepositoryWindowViewModel : ViewModelBase
 
     private void SwitchToUnlocked()
     {
-        CurrentPage = new UnlockedRepositoryViewModel(passStore);
+        var directory = passStore.GetGroupByType(GROUP_TYPE_DEFAULT)
+            ?? passStore.GetRootDirectory();
+        CurrentPage = new UnlockedRepositoryViewModel(passStore, directory);
     }
 
     private void SwitchToLocked()

src/KeyKeeper/ViewModels/UnlockedRepositoryViewModel.cs

@@ -8,13 +8,14 @@ namespace KeyKeeper.ViewModels;
 public class UnlockedRepositoryViewModel : ViewModelBase
 {
     private IPassStore passStore;
+    private IPassStoreDirectory currentDirectory;
     private bool hasUnsavedChanges;
 
     public IEnumerable<PassStoreEntryPassword> Passwords
     {
         get
         {
-            return passStore.GetRootDirectory()
+            return currentDirectory
                 .Where(entry => entry is PassStoreEntryPassword)
                 .Select(entry => (entry as PassStoreEntryPassword)!);
         }
@@ -30,9 +31,10 @@ public class UnlockedRepositoryViewModel : ViewModelBase
         }
     }
 
-    public UnlockedRepositoryViewModel(IPassStore store)
+    public UnlockedRepositoryViewModel(IPassStore store, IPassStoreDirectory directory)
     {
         passStore = store;
+        currentDirectory = directory;
         HasUnsavedChanges = false;
     }
 
@@ -40,7 +42,7 @@ public class UnlockedRepositoryViewModel : ViewModelBase
     {
         if (entry is PassStoreEntryPassword)
         {
-            (passStore.GetRootDirectory() as PassStoreEntryGroup)!.ChildEntries.Add(entry);
+            currentDirectory.AddEntry(entry);
             HasUnsavedChanges = true;
             OnPropertyChanged(nameof(Passwords));
         }
@@ -48,18 +50,15 @@ public class UnlockedRepositoryViewModel : ViewModelBase
 
     public void DeleteEntry(Guid id)
     {
-        (passStore.GetRootDirectory() as PassStoreEntryGroup)!.DeleteEntry(id);
+        currentDirectory.DeleteEntry(id);
         HasUnsavedChanges = true;
         OnPropertyChanged(nameof(Passwords));
     }
 
     public void UpdateEntry(PassStoreEntryPassword updatedEntry)
     {
-        var root = passStore.GetRootDirectory() as PassStoreEntryGroup;
-        if (root == null) return;
-
-        root.DeleteEntry(updatedEntry.Id);
-        root.ChildEntries.Add(updatedEntry);
+        currentDirectory.DeleteEntry(updatedEntry.Id);
+        currentDirectory.AddEntry(updatedEntry);
         OnPropertyChanged(nameof(Passwords));
     }
 
@@ -68,4 +67,4 @@ public class UnlockedRepositoryViewModel : ViewModelBase
         passStore.Save();
         HasUnsavedChanges = false;
     }
-}
+}