SUBD_TransportCompany/TransportCompany/TransportCompanyDatabaseImplement/Implements/CargoStorage.cs

using TransportCompanyContracts.BindingModels;
using TransportCompanyContracts.SearchModels;
using TransportCompanyContracts.StoragesContracts;
using TransportCompanyContracts.ViewModels;
using TransportCompanyDatabaseImplement.Models;

namespace TransportCompanyDatabaseImplement.Implements
{
    public class CargoStorage : ICargoStorage
    {
        public List<CargoViewModel> GetFullList()
        {
            using var context = new TransportCompanyDatabase();
            return context.Cargos.Select(x => x.GetViewModel).ToList();
        }

        public List<CargoViewModel> GetFilteredList(CargoSearchModel model)
        {
            if (string.IsNullOrEmpty(model.CargoName))
            {
                return new();
            }
            using var context = new TransportCompanyDatabase();
            return context.Cargos.Where(x => x.CargoName.Contains(model.CargoName)).Select(x => x.GetViewModel).ToList();
        }

        public CargoViewModel? GetElement(CargoSearchModel model)
        {
            if (string.IsNullOrEmpty(model.CargoName) && !model.Id.HasValue)
            {
                return null;
            }
            using var context = new TransportCompanyDatabase();
            return context.Cargos.FirstOrDefault(x =>
            (!string.IsNullOrEmpty(model.CargoName) && x.CargoName == model.CargoName) ||
            (model.Id.HasValue && x.Id == model.Id))
                ?.GetViewModel;
        }

        public CargoViewModel? Insert(CargoBindingModel model)
        {
            var newComponent = Cargo.Create(model);
            if (newComponent == null)
            {
                return null;
            }
            using var context = new TransportCompanyDatabase();
            context.Cargos.Add(newComponent);
            context.SaveChanges();
            return newComponent.GetViewModel;
        }

        public CargoViewModel? Update(CargoBindingModel model)
        {
            using var context = new TransportCompanyDatabase();
            var component = context.Cargos.FirstOrDefault(x => x.Id == model.Id);
            if (component == null)
            {
                return null;
            }
            component.Update(model);
            context.SaveChanges();
            return component.GetViewModel;
        }

        public CargoViewModel? Delete(CargoBindingModel model)
        {
            using var context = new TransportCompanyDatabase();
            var element = context.Cargos.FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Cargos.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}