PIbd-23_Elatomtsev_L.K._SUBD_Device/DeviceDatabaseImplement/Implements/DeviceStorage.cs

using DeviceContracts.BindingModels;
using DeviceContracts.SearchModels;
using DeviceContracts.StoragesContracts;
using DeviceContracts.ViewModels;
using DeviceDatabaseImplement.Models;

namespace DeviceDatabaseImplement.Implements
{
    public class DeviceStorage : IDeviceStorage
    {
        public List<DeviceViewModel> GetFullList()
        {
            using var context = new DeviceDatabase();
            return context.Devices.Select(x => x.GetViewModel).ToList();
        }

        public List<DeviceViewModel> GetFilteredList(DeviceSearchModel model)
        {
            if (string.IsNullOrEmpty(model.Model) &&
                string.IsNullOrEmpty(model.SerialNumber) &&
                model.ProductionDate == null &&
                model.WarrantyPeriod == 0 &&
                model.Condition == null &&
                model.KindId == 0 &&
                model.KitId == 0)
            {
                return new();
            }

            using var context = new DeviceDatabase();
            return context.Devices
                .Where(x => (string.IsNullOrEmpty(model.Model) || x.Model == model.Model) &&
                            (string.IsNullOrEmpty(model.SerialNumber) || x.SerialNumber == model.SerialNumber) &&
                            (model.ProductionDate == null || x.ProductionDate == model.ProductionDate) &&
                            (model.WarrantyPeriod == 0 || x.WarrantyPeriod == model.WarrantyPeriod) &&
                            (model.Condition == null || x.Condition == model.Condition) &&
                            (model.KindId == 0 || x.KindId == model.KindId) &&
                            (model.KitId == 0 || x.KitId == model.KitId))
                .Select(x => x.GetViewModel).ToList();
        }

        public DeviceViewModel? GetElement(DeviceSearchModel model)
        {
            if (string.IsNullOrEmpty(model.Model) &&
                string.IsNullOrEmpty(model.SerialNumber) &&
                model.ProductionDate == null &&
                model.WarrantyPeriod == 0 &&
                model.Condition == null &&
                model.KindId == 0 &&
                model.KitId == 0)
            {
                return null;
            }

            using var context = new DeviceDatabase();
            return context.Devices
                .FirstOrDefault(x => (string.IsNullOrEmpty(model.Model) || x.Model == model.Model) &&
                                    (string.IsNullOrEmpty(model.SerialNumber) || x.SerialNumber == model.SerialNumber) &&
                                    (model.ProductionDate == null || x.ProductionDate == model.ProductionDate) &&
                                    (model.WarrantyPeriod == 0 || x.WarrantyPeriod == model.WarrantyPeriod) &&
                                    (model.Condition == null || x.Condition == model.Condition) &&
                                    (model.KindId == 0 || x.KindId == model.KindId) &&
                                    (model.KitId == 0 || x.KitId == model.KitId))
                ?.GetViewModel;
        }

        public DeviceViewModel? Insert(DeviceBindingModel model)
        {
            var newDevice = Device.Create(model);
            if (newDevice == null)
            {
                return null;
            }

            using var context = new DeviceDatabase();
            context.Devices.Add(newDevice);
            context.SaveChanges();
            return newDevice.GetViewModel;
        }

        public DeviceViewModel? Update(DeviceBindingModel model)
        {
            using var context = new DeviceDatabase();
            var device = context.Devices
                .FirstOrDefault(x => x.Id == model.Id);

            if (device == null)
            {
                return null;
            }

            device.Update(model);
            context.SaveChanges();
            return device.GetViewModel;
        }

        public DeviceViewModel? Delete(DeviceBindingModel model)
        {
            using var context = new DeviceDatabase();
            var device = context.Devices
                .FirstOrDefault(x => x.Id == model.Id);

            if (device != null)
            {
                context.Devices.Remove(device);
                context.SaveChanges();
                return device.GetViewModel;
            }

            return null;
        }
    }
}