PIbd-31_Alekseev.I.S._COP_3/StudentPerformanceBusinessLogic/BusinessLogics/FormatLogic.cs

using StudentPerformanceContracts.BindingModels;
using StudentPerformanceContracts.BusinessLogicContracts;
using StudentPerformanceContracts.SearchModels;
using StudentPerformanceContracts.StorageContracts;
using StudentPerformanceContracts.ViewModels;

namespace StudentPerformanceBusinessLogic.BusinessLogics
{
    public class FormatLogic : IFormatLogic
    {
        private readonly IFormatStorage _formatStorage;

        public FormatLogic(IFormatStorage formatStorage)
        {
            _formatStorage = formatStorage;
        }

        public List<FormatViewModel>? ReadList(FormatSearchModel? model)
        {
            var list = model == null ? _formatStorage.GetFullList() : _formatStorage.GetFilteredList(model);
            if (list == null)
            {
                return null;
            }
            return list;
        }

        public FormatViewModel? ReadElement(FormatSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            var element = _formatStorage.GetElement(model);
            if (element == null)
            {
                return null;
            }
            return element;
        }

        public bool Create(FormatBindingModel model)
        {
            CheckModel(model);
            if (_formatStorage.Insert(model) == null)
            {
                return false;
            }
            return true;
        }

        public bool Update(FormatBindingModel model)
        {
            CheckModel(model);
            if (_formatStorage.Update(model) == null)
            {
                return false;
            }
            return true;
        }
        public bool Delete(FormatBindingModel model)
        {
            CheckModel(model, false);
            if (_formatStorage.Delete(model) == null)
            {
                return false;
            }
            return true;
        }

        private void CheckModel(FormatBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.Name))
            {
                throw new ArgumentNullException("Нет наименования формата обучения", nameof(model.Name));
            }
        }
    }
}