Put one Method to Count all ShoppingListsRecipe

Francesco.Recipes.World/Francesco.Recipes.World.csproj

@@ -49,8 +49,6 @@
   <Folder Include="Services\Category\" />
   <Folder Include="Services\MediaFile\" />
   <Folder Include="Services\Ingredient\" />
-  <Folder Include="Services\Instruction\" />
-  <Folder Include="Services\ShoppingList\" />
   <Folder Include="Services\Recipe\" />
 </ItemGroup>
 

Francesco.Recipes.World/Services/ShoppingList/IShoppingListService.cs

@@ -0,0 +1,7 @@
+namespace Francesco.Recipes.World.Services.ShoppingList
+{
+    public interface IShoppingListService
+    {
+        Task<int> GetShoppingListRecipeCountAsync(Guid shoppingListId);
+    }
+}

Francesco.Recipes.World/Services/ShoppingList/ShoppingListService.cs

@@ -0,0 +1,22 @@
+using Francesco.Recipes.World.Data;
+using Microsoft.EntityFrameworkCore;
+
+namespace Francesco.Recipes.World.Services.ShoppingList
+{
+    public class ShoppingListService
+    {
+        private readonly FrancescosRecipesWorldDbContext _context;
+
+        public ShoppingListService(FrancescosRecipesWorldDbContext context)
+        {
+            _context = context;
+        }
+
+        public async Task<int> GetShoppingListRecipeCountAsync(Guid shoppingListId)
+        {
+            return await _context.RecipeShoppingLists
+                .Where(rsl => rsl.ShoppingList.Id == shoppingListId)
+                .CountAsync();
+        }
+    }
+}