Initial Commit

blazor/Services/Website/EntityDialogService.cs

@@ -0,0 +1,76 @@
+namespace Services.Website;
+
+//TODO Move to a database folder, with EntityService, EntityFilterService
+public class EntityDialogService : IEntityDialogService
+{
+    private readonly List<string> history = new();
+    private string? entityId;
+
+    public void Subscribe(Action action)
+    {
+        OnChange += action;
+    }
+
+    public void Unsubscribe(Action action)
+    {
+        OnChange += action;
+    }
+
+    public void AddDialog(string id)
+    {
+        entityId = id;
+        history.Add(id);
+
+        NotifyDataChanged();
+    }
+
+    public void CloseDialog()
+    {
+        entityId = null;
+        history.Clear();
+
+        NotifyDataChanged();
+    }
+
+    public void BackDialog()
+    {
+        if (history.Count > 1)
+        {
+            history.RemoveAt(history.Count - 1);
+
+            if (history.Count == 0)
+            {
+                entityId = null;
+                NotifyDataChanged();
+
+                return;
+            }
+
+            entityId = history.Last();
+            NotifyDataChanged();
+        }
+    }
+
+
+    public bool HasDialog()
+    {
+        return entityId != null;
+    }
+
+    public bool HasHistory()
+    {
+        return history.Count > 1;
+    }
+
+    public string? GetEntityId()
+    {
+        return entityId;
+    }
+
+    private event Action OnChange = null!;
+
+    private void NotifyDataChanged()
+    {
+        OnChange?.Invoke();
+    }
+}