Реализовал логику доя товаров

InternetShop/InternetShopContracts/StorageContracts/IProductStorage.cs

@@ -11,6 +11,6 @@ namespace InternetShopContracts.StorageContracts
         ProductViewModel? GetElement(ProductSearchModel model);
         ProductViewModel? Insert(ProductBindingModel model);
         ProductViewModel? Update(ProductBindingModel model);
-        ProductViewModel? Delete(OrderBindingModel model);
+        ProductViewModel? Delete(ProductBindingModel model);
     }
 }

InternetShop/InternetShopLogics/Logics/ProductLogic.cs

@@ -2,34 +2,91 @@
 using InternetShopContracts.DataSearchModels;
 using InternetShopContracts.DataViewModels;
 using InternetShopContracts.LogicsContracts;
+using InternetShopContracts.StorageContracts;
 
 namespace InternetShopLogics.Logics
 {
     public class ProductLogic : IProductLogic
     {
+        private IProductStorage _productStorage;
+
+        public ProductLogic(IProductStorage productStorage)
+        {
+            _productStorage = productStorage;
+        }
+
         public bool Create(ProductBindingModel model)
         {
-            throw new NotImplementedException();
+            CheckModel(model);
+            if (_productStorage.Insert(model) == null)
+            {
+                return false;
+            }
+            return true;
         }
 
         public bool Delete(ProductBindingModel model)
         {
-            throw new NotImplementedException();
+            CheckModel(model, false);
+            if (_productStorage.Delete(model) == null)
+            {
+                return false;
+            }
+            return true;
         }
 
         public ProductViewModel? ReadElement(ProductSearchModel model)
         {
-            throw new NotImplementedException();
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            return _productStorage.GetElement(model);
         }
 
         public List<ProductViewModel> ReadList(ProductSearchModel? model = null)
         {
-            throw new NotImplementedException();
+            List<ProductViewModel>? list = null;
+            if (model == null)
+            {
+                list = _productStorage.GetFullList();
+            }
+            else
+            {
+                list = _productStorage.GetFilteredList(model);
+            }
+            if (list == null)
+            {
+                return new List<ProductViewModel>();
+            }
+            return list;
         }
 
         public bool Update(ProductBindingModel model)
         {
-            throw new NotImplementedException();
+            CheckModel(model);
+            if (_productStorage.Update(model) == null)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        private void CheckModel(ProductBindingModel model, bool checkParams = true)
+        {
+            if (model == null) throw new ArgumentNullException(nameof(model));
+            if (!checkParams) return;
+            if (string.IsNullOrEmpty(model.Name))
+            {
+                throw new ArgumentNullException("Нет названия товара", nameof(model.Name));
+            }
+            var item = _productStorage.GetElement(new ProductSearchModel
+            {
+                Name = model.Name
+            });
+            if (item != null && item.Id != model.Id)
+            {
+                throw new InvalidOperationException("Товар с таким названием уже есть");
             }
     }
 }