ISEbd-21_Melnikov_I.O._CarService/CarService/CarServiceDatabase/Implements/ItemStorage.cs

using CarServiceContracts.BindingModels;
using CarServiceContracts.Models;
using CarServiceContracts.SearchModels;
using CarServiceContracts.StorageContracts;
using CarServiceContracts.ViewModels;
using CarServiceDatabase.Models;
using Microsoft.EntityFrameworkCore;

namespace CarServiceDatabase.Implements
{
	public class ItemStorage : IItemStorage
	{
		public List<ItemViewModel> GetFullList()
		{
			using var context = new CarServiceDbContext();
			return context.Items
				.Include(x => x.Worker)
				.Select(x => x.GetViewModel)
				.ToList();
		}
		public List<ItemViewModel> GetFilteredList(ItemSearchModel model)
		{
			using var context = new CarServiceDbContext();
			return context.Items
				.Where(x => x.Id == model.Id)
				.Include(x => x.Worker)
				.Select(x => x.GetViewModel)
				.ToList();
		}
		public ItemViewModel? GetElement(ItemSearchModel model)
		{
			if (model == null)
			{
				return null;
			}
			using var context = new CarServiceDbContext();
			if (model.Id.HasValue)//сначала ищем по Id
			{
				return context.Items
					.Include(x => x.Worker)
					.FirstOrDefault(x => x.Id == model.Id)?.GetViewModel;
			}
			if (!string.IsNullOrEmpty(model.Name))//затем по названию
			{
				return context.Items
					.Include(x => x.Worker)
					.FirstOrDefault(x => x.Name == model.Name)?.GetViewModel;
			}
			return null;
		}
		public ItemViewModel? Insert(ItemBindingModel model)
		{
			using var context = new CarServiceDbContext();
			var newItem = Item.Create(context, model);
			if (newItem != null)
			{
				context.Items.Add(newItem);
				context.SaveChanges();
				return newItem.GetViewModel;
			}
			return null;
		}
		public ItemViewModel? Update(ItemBindingModel model)
		{
			using var context = new CarServiceDbContext();
			var item = context.Items.FirstOrDefault(x => x.Id == model.Id);
			if (item == null)
			{
				return null;
			}
			item.Update(context, model);
			context.SaveChanges();
			return item.GetViewModel;
		}
		public ItemViewModel? Delete(ItemBindingModel model)
		{
			using var context = new CarServiceDbContext();
			var item = context.Items.FirstOrDefault(x => x.Id == model.Id);
			if (item == null)
			{
				return null;
			}
			context.Items.Remove(item);
			context.SaveChanges();
			return item.GetViewModel;
		}
		public ItemViewModel? UpdateCount(IItemModel? model, int count)
		{
			if (model == null)
			{
				return null;
			}
			using var context = new CarServiceDbContext();
			var item = context.Items.FirstOrDefault(x => x.Id == model.Id);
			if (item == null)
			{
				return null;
			}
			item.UpdateCount(model, count);
			return item.GetViewModel;
		}
	}
}