Доработка логики привязки статьи затрат

CarService/CarServiceBusinessLogic/BusinessLogics/ItemForRepairLogic.cs

@@ -11,10 +11,12 @@ namespace CarServiceBusinessLogic.BusinessLogics
 	{
 		private readonly ILogger _logger;
 		private readonly IItemForRepairStorage _itemForRepairStorage;
-		public ItemForRepairLogic(ILogger<ItemForRepairLogic> logger, IItemForRepairStorage itemForRepairStorage)
+		private readonly IItemStorage _itemStorage;
+		public ItemForRepairLogic(ILogger<ItemForRepairLogic> logger, IItemForRepairStorage itemForRepairStorage, IItemStorage itemStorage)
 		{
 			_logger = logger;
 			_itemForRepairStorage = itemForRepairStorage;
+			_itemStorage = itemStorage;
 		}
 		public List<ItemForRepairViewModel>? ReadList(ItemForRepairSearchModel? model)
 		{
@@ -47,6 +49,13 @@ namespace CarServiceBusinessLogic.BusinessLogics
 		public bool Create(ItemForRepairBindingModel model)
 		{
 			CheckModel(model);
+			//При добавлении привязки уменьшаем количество нужной статьи затрат
+			var item = _itemStorage.GetElement(new() { Id = model.ItemId });
+			if (_itemStorage.UpdateCount(item, -model.Count) == null)
+			{
+				_logger.LogWarning("Insert operation failed while updating count");
+				return false;
+			}
 			if (_itemForRepairStorage.Insert(model) == null)
 			{
 				_logger.LogWarning("Insert operation failed");
@@ -57,6 +66,20 @@ namespace CarServiceBusinessLogic.BusinessLogics
 		public bool Update(ItemForRepairBindingModel model)
 		{
 			CheckModel(model);
+			//Возвращаем нужное количество старых статей затрат на склад
+			var oldItem = _itemStorage.GetElement(new() { Id = (_itemForRepairStorage.GetElement(new() { Id = model.ItemId })?.ItemId ?? -1) });
+			if (_itemStorage.UpdateCount(oldItem, model.Count) == null)
+			{
+				_logger.LogWarning("Insert operation failed while returning old intem on storage");
+				return false;
+			}
+			//Списываем новую статью затрат со склада в новом количестве
+			var newItem = _itemStorage.GetElement(new() { Id = model.ItemId });
+			if (_itemStorage.UpdateCount(newItem, -model.Count) == null)
+			{
+				_logger.LogWarning("Insert operation failed while updating count");
+				return false;
+			}
 			if (_itemForRepairStorage.Update(model) == null)
 			{
 				_logger.LogWarning("Update operation failed");
@@ -85,6 +108,14 @@ namespace CarServiceBusinessLogic.BusinessLogics
 			{
 				return;
 			}
+			//Получаем текущее число статей затрат выбранного вида на складе
+			int currentItemOnStorage = _itemStorage.GetElement(new() { Id = model.ItemId })?.Count ?? -1;
+			//Если на складе осталось статей затрат выбранного вида меньше, чем нужно на заявку, отменяем добавление привязки
+			if (currentItemOnStorage < model.Count)
+			{
+				_logger.LogWarning("Not enough items {Id} on storage", model.ItemId);
+				throw new ArgumentException("На складе не хватает запчастей");
+			}
 			_logger.LogInformation("ItemForRepair. Id: {Id}", model.Id);
 		}
 	}

CarService/CarServiceContracts/StorageContracts/IItemStorage.cs

@@ -1,4 +1,5 @@
 using CarServiceContracts.BindingModels;
+using CarServiceContracts.Models;
 using CarServiceContracts.SearchModels;
 using CarServiceContracts.ViewModels;
 
@@ -12,5 +13,6 @@ namespace CarServiceContracts.StorageContracts
 		ItemViewModel? Insert(ItemBindingModel model);
 		ItemViewModel? Update(ItemBindingModel model);
 		ItemViewModel? Delete(ItemBindingModel model);
+		ItemViewModel? UpdateCount(IItemModel? model, int count);
 	}
 }

CarService/CarServiceDatabase/Implements/ItemStorage.cs

@@ -1,4 +1,5 @@
 using CarServiceContracts.BindingModels;
+using CarServiceContracts.Models;
 using CarServiceContracts.SearchModels;
 using CarServiceContracts.StorageContracts;
 using CarServiceContracts.ViewModels;
@@ -83,5 +84,20 @@ namespace CarServiceDatabase.Implements
 			context.SaveChanges();
 			return item.GetViewModel;
 		}
+		public ItemViewModel? UpdateCount(IItemModel? model, int count)
+		{
+			if (model == null)
+			{
+				return null;
+			}
+			using var context = new CarServiceDbContext();
+			var item = context.Items.FirstOrDefault(x => x.Id == model.Id);
+			if (item == null)
+			{
+				return null;
+			}
+			item.UpdateCount(model, count);
+			return item.GetViewModel;
+		}
 	}
 }

CarService/CarServiceDatabase/Models/Item.cs

@@ -48,6 +48,14 @@ namespace CarServiceDatabase.Models
 			Count = model.Count;
 			Worker = context.Workers.First(x => x.Id == model.WorkerId);
 		}
+		public void UpdateCount(IItemModel? model, int count)
+		{
+			if (model == null)
+			{
+				return;
+			}
+			Count -= model.Count;
+		}
 		public ItemViewModel GetViewModel => new()
 		{
 			Id = Id,

CarService/CarServiceView/Program.cs

@@ -19,7 +19,7 @@ namespace CarServiceView
 			var services = new ServiceCollection();
 			ConfigureServices(services);
 			_serviceProvider = services.BuildServiceProvider();
-			Application.Run(_serviceProvider.GetRequiredService<FormRegistrationWorker>());
+			Application.Run(_serviceProvider.GetRequiredService<FormItemForRepairTest>());
 		}
 		private static void ConfigureServices(ServiceCollection services)
 		{