flavors work with API now

zero.Core/Stores/Flavors/FlavorOptions.cs

@@ -1,6 +1,6 @@
 using System.Collections.Concurrent;
 
-namespace zero.Pages;
+namespace zero.Stores;
 
 public class FlavorOptions
 {
@@ -45,6 +45,13 @@ public class FlavorOptions
   }
 
 
+  public bool Exists<TEntity>(string alias)
+  {
+    List<FlavorConfig> flavors = Flavors.GetValueOrDefault(typeof(TEntity), new());
+    return flavors.Any(x => x.Alias == alias);
+  }
+
+
   public void Provide<TEntity>()
     where TEntity : ISupportsFlavors, new()
   {

zero.Core/Stores/StoreOperations.Write.cs

@@ -18,7 +18,29 @@ public partial class StoreOperations : IStoreOperations
       return Result<T>.Fail("@errors.onsave.empty");
     }
 
-    bool isUpdate = !model.Id.IsNullOrEmpty() && await Session.Advanced.ExistsAsync(model.Id);
+    bool isUpdate = false;
+
+    // check if the Id for a model already exists
+    if (!model.Id.IsNullOrEmpty())
+    {
+      bool exists = await Session.Advanced.ExistsAsync(model.Id);
+
+      if (!exists)
+      {
+        return Result<T>.Fail("@errors.onsave.noidmatch");
+      }
+
+      isUpdate = true;
+    }
+
+    // validate flavor
+    if (model is ISupportsFlavors flavorModel && !flavorModel.Flavor.IsNullOrEmpty())
+    {
+      if (!Flavors.Exists<T>(flavorModel.Flavor))
+      {
+        return Result<T>.Fail("@errors.onsave.flavornotfound");
+      }   
+    }
 
     // prepare model
     PrepareForSave(model);