ComputerHardwareStore_YouAreProgrammer/ComputerHardwareStore/ComputerHardwareStoreBusinessLogic/BusinessLogic/CommentLogic.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 CommentLogic : ICommentLogic
    {
        private readonly ILogger _logger;
        private readonly ICommentStorage _commentStorage;

        public CommentLogic(ILogger<CommentLogic> logger, ICommentStorage commentStorage)
        {
            _logger = logger;
            _commentStorage = commentStorage;
        }

        public List<CommentViewModel>? ReadList(CommentSearchModel? model)
        {
            _logger.LogInformation("ReadList Comment. Id:{Id}", model?.Id);
            var list = model == null ? _commentStorage.GetFullList() :
                _commentStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList Comment return null list");
                return null;
            }
            _logger.LogInformation("ReadList Comment. Count:{Count}", list.Count);
            return list;
        }

        public CommentViewModel? ReadElement(CommentSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement Comment. Id:{ Id}", model.Id);
            var element = _commentStorage.GetElement(model);
            if (element == null)
            {
                _logger.LogWarning("ReadElement Comment element not found");
                return null;
            }
            _logger.LogInformation("ReadElement Comment find. Id:{Id}", element.Id);
            return element;
        }

        public bool Create(CommentBindingModel model)
        {
            CheckModel(model);
            if (_commentStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert Comment operation failed");
                return false;
            }
            return true;
        }

        public bool Update(CommentBindingModel model)
        {
            CheckModel(model);
            if (_commentStorage.Update(model) == null)
            {
                _logger.LogWarning("Update Comment operation failed");
                return false;
            }
            return true;
        }

        public bool Delete(CommentBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation("Delete. Id:{Id}", model.Id);
            if (_commentStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete Comment operation failed");
                return false;
            }
            return true;
        }
        private void CheckModel(CommentBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.Text))
            {
                throw new ArgumentNullException("Нет текста комментария", nameof(model.Text));
            }
        }
    }
}