using DatabaseImplement.Implements; using DataContracts.bindingModels; using DataContracts.BLs; using DataContracts.searchModels; using DataContracts.viewModels; using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace BusinessLogic { public class ProductBL : IProductBL { private readonly ProductStorage _productStorage = new(); public bool Create(ProductBindingModel model) { CheckModel(model); if (_productStorage.Insert(model) == null) { return false; } return true; } public bool Delete(ProductBindingModel model) { CheckModel(model, false); if (_productStorage.Delete(model) == null) { return false; } return true; } public ProductViewModel? ReadElement(ProductSearchModel model) { if (model == null) { throw new ArgumentNullException(nameof(model)); } var element = _productStorage.GetElement(model); if (element == null) { return null; } return element; } public List? ReadList() { var list = _productStorage.GetFullList(); if (list == null) { return null; } return list; } public bool Update(ProductBindingModel model) { CheckModel(model); if (_productStorage.Update(model) == null) { return false; } return true; } private void CheckModel(ProductBindingModel model, bool withParams = true) { if (model == null) { throw new ArgumentNullException(nameof(model)); } if (!withParams) { return; } if (string.IsNullOrEmpty(model.title)) { throw new ArgumentNullException("Нет имени клиента", nameof(model.title)); } } } }