PIbd-21_Anisin_R.S._CourseWork_TravelAgency/TravelAgency/TravelAgencyBusinessLogic/BusinessLogics/TourLogic.cs

using Microsoft.Extensions.Logging;
using TravelAgencyContracts.BindingModels;
using TravelAgencyContracts.BusinessLogicsContracts;
using TravelAgencyContracts.SearchModels;
using TravelAgencyContracts.StoragesContracts;
using TravelAgencyContracts.ViewModels;

namespace TravelAgencyBusinessLogic.BusinessLogics
{
    public class TourLogic : ITourLogic
    {
        private readonly ILogger _logger;

        private readonly ITourStorage _tourStorage;

        public TourLogic(ILogger<TourLogic> logger, ITourStorage tourStorage)
        {
            _logger = logger;
            _tourStorage = tourStorage;
        }

        public List<TourViewModel>? ReadList(TourSearchModel? model)
        {
            _logger.LogInformation("ReadList. Id: {Id}, TourName: {TourName}, UserId: {UserId}.", model?.Id, model?.TourName, model?.UserId);
            var list = (model == null) ? _tourStorage.GetFullList() : _tourStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count: {Count}", list.Count);
            return list;
        }

        public TourViewModel? ReadElement(TourSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. Tour id: {Id}, Tour name: {TourName}", model?.Id, model?.TourName);
            var element = _tourStorage.GetElement(model!);
            if (element == null)
            {
                _logger.LogWarning("ReadElement element not found");
                return null;
            }
            _logger.LogInformation("ReadElement find. Id: {Id}", element.Id);
            return element;
        }

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

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

        public bool Delete(TourBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation("Delete. Id: {Id}", model.Id);
            if (_tourStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }

        private void CheckModel(TourBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.TourName))
            {
                throw new ArgumentNullException("Нет названия тура", nameof(model.TourName));
            }
            if (model.TourDate == DateTime.MinValue)
            {
                throw new ArgumentNullException("Нет даты тура", nameof(model.TourDate));
            }
            if (model.Price <= 0)
            {
                throw new ArgumentNullException("Цена тура должна быть больше 0", nameof(model.Price));
            }
            if (model.UserId <= 0)
            {
                throw new ArgumentNullException("Некорректный идентификатор пользователя", nameof(model.UserId));
            }
            _logger.LogInformation("Tour. Id: {id}, TourName: {TourName}, Price: {Price}, UserId: {UserId}", model.Id, model.TourName, model.Price, model.UserId);
            var element = _tourStorage.GetElement(new TourSearchModel
            {
                TourName = model.TourName
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Тур с таким названием уже есть");
            }
        }
    }
}