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

using DeviceContracts.BindingModels;
using DeviceContracts.SearchModels;
using DeviceContracts.StoragesContracts;
using DeviceContracts.ViewModels;
using DeviceDatabaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DeviceDatabaseImplement.Implements
{
    public class ServiceStorage : IServiceStorage
    {
        public List<ServiceViewModel> GetFullList()
        {
            using var context = new DeviceDatabase();
            return context.Services.Select(x => x.GetViewModel).ToList();
        }

        public List<ServiceViewModel> GetFilteredList(ServiceSearchModel model)
        {
            if (string.IsNullOrEmpty(model.Description) &&
                model.DeviceId == 0 &&
                model.StartDate == null &&
                model.EndDate == null)
            {
                return new();
            }

            using var context = new DeviceDatabase();
            return context.Services
                .Where(x => (string.IsNullOrEmpty(model.Description) ||
                x.Description == model.Description) && (model.DeviceId == 0 ||
                x.DeviceId == model.DeviceId) && (model.StartDate == null ||
                x.StartDate >= model.StartDate) && (model.EndDate == null ||
                x.EndDate <= model.EndDate))
                .Select(x => x.GetViewModel).ToList();
        }

        public ServiceViewModel? GetElement(ServiceSearchModel model)
        {
            if (string.IsNullOrEmpty(model.Description) &&
                model.DeviceId == 0 &&
                model.StartDate == null &&
                model.EndDate == null)
            {
                return null;
            }

            using var context = new DeviceDatabase();
            return context.Services
                .FirstOrDefault(x => (string.IsNullOrEmpty(model.Description) ||
                x.Description == model.Description) && (model.DeviceId == 0 ||
                x.DeviceId == model.DeviceId) && (model.StartDate == null ||
                x.StartDate >= model.StartDate) && (model.EndDate == null ||
                x.EndDate <= model.EndDate))
                ?.GetViewModel;
        }

        public ServiceViewModel? Insert(ServiceBindingModel model)
        {
            var newService = Service.Create(model);
            if (newService == null)
            {
                return null;
            }

            using var context = new DeviceDatabase();
            context.Services.Add(newService);
            context.SaveChanges();
            return newService.GetViewModel;
        }

        public ServiceViewModel? Update(ServiceBindingModel model)
        {
            using var context = new DeviceDatabase();
            var service = context.Services
                .FirstOrDefault(x => x.Id == model.Id);

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

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

        public ServiceViewModel? Delete(ServiceBindingModel model)
        {
            using var context = new DeviceDatabase();
            var service = context.Services
                .FirstOrDefault(x => x.Id == model.Id);

            if (service != null)
            {
                context.Services.Remove(service);
                context.SaveChanges();
                return service.GetViewModel;
            }

            return null;
        }
    }
}