ComputerHardwareStore_YouAreProgrammer/ComputerHardwareStore/ComputerHardwareStoreBusinessLogic/BusinessLogic/PurchaseLogic.cs

using ComputerHardwareStoreContracts.BindingModels;
using ComputerHardwareStoreContracts.BusinessLogicsContracts;
using ComputerHardwareStoreContracts.SearchModels;
using ComputerHardwareStoreContracts.StorageContracts;
using ComputerHardwareStoreContracts.ViewModels;
using Microsoft.Extensions.Logging;

namespace ComputerHardwareStoreBusinessLogic.BusinessLogic
{
    public class PurchaseLogic : IPurchaseLogic
    {
        private readonly ILogger _logger;
        private readonly IPurchaseStorage _purchaseStorage;

        public PurchaseLogic(ILogger<PurchaseLogic> logger, IPurchaseStorage purchaseStorage)
        {
            _logger = logger;
            _purchaseStorage = purchaseStorage;
        }

        public List<PurchaseViewModel>? ReadList(PurchaseSearchModel? model)
        {
            _logger.LogInformation("ReadList Purchase. Id:{ Id}", model?.Id);
            var list = model == null ? _purchaseStorage.GetFullList() :
                _purchaseStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList Purchase return null list");
                return null;
            }
            _logger.LogInformation("ReadList Purchase. Count:{Count}", list.Count);
            return list;
        }

        public PurchaseViewModel? ReadElement(PurchaseSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement Purchase. Id:{ Id}", model.Id);
            var element = _purchaseStorage.GetElement(model);
            if (element == null)
            {
                _logger.LogWarning("ReadElement Purchase element not found");
                return null;
            }
            _logger.LogInformation("ReadElement Purchase find. Id:{Id}", element.Id);
            return element;
        }

        public bool Create(PurchaseBindingModel model)
        {
            CheckModel(model);
            if (_purchaseStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert Purchase operation failed");
                return false;
            }
            return true;
        }

        public bool Update(PurchaseBindingModel model)
        {
            CheckModel(model);
            if (_purchaseStorage.Update(model) == null)
            {
                _logger.LogWarning("Update Purchase operation failed");
                return false;
            }
            return true;
        }

        public bool Delete(PurchaseBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation("Delete. Id:{Id}", model.Id);
            if (_purchaseStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete Purchase operation failed");
                return false;
            }
            return true;
        }
        private void CheckModel(PurchaseBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (model.DateCreate == null) // TODO чего блин, всмысле нет
            {
                throw new ArgumentNullException("Нет даты создания покупки", nameof(model.Date));
            }
            if (model.Cost <= 0)
            {
                throw new ArgumentNullException("Стоимость покупки должна быть больше 0", nameof(model.Cost));
            }
        }
    }
}