PIbd-22_Bazunov_A.I._SushiBar/SushiBar/SushiBarDatabaseImplement/Implements/OrderStorage.cs

using SushiBarContracts.BindingModels;
using SushiBarContracts.SearchModels;
using SushiBarContracts.StoragesContracts;
using SushiBarContracts.ViewModels;
using SushiBarDatabaseImplement.Models;

namespace SushiBarDatabaseImplement.Implements
{
    public class OrderStorage : IOrderStorage
    {
        public OrderViewModel? Delete(OrderBindingModel model)
        {
            using var context = new SushiBarDatabase();

            var element = context.Orders.FirstOrDefault(rec => rec.Id == model.Id);

            if (element == null) return null;
            context.Orders.Remove(element);
            context.SaveChanges();

            return element.GetViewModel;

        }

        public OrderViewModel? GetElement(OrderSearchModel model)
        {
            if (!model.Id.HasValue)
            {
                return null;
            }

            using var context = new SushiBarDatabase();

            return context.Orders
                .FirstOrDefault(x => (model.Id.HasValue && x.Id == model.Id))
                ?.GetViewModel;
        }

        public List<OrderViewModel> GetFilteredList(OrderSearchModel? model)
        {
            if (model is null) 
                return new List<OrderViewModel>();

            using var context = new SushiBarDatabase();
            if (!model.Id.HasValue)
            {
                return context.Orders
                    .Where(x => x.DateCreate >= model.DateFrom && x.DateCreate <= model.DateTo)
                    .Select(x => x.GetViewModel)
                    .ToList();
            }

            if (!model.ClientId.HasValue)
            {
                return context.Orders
                    .Where(x => x.ClientId == model.ClientId)
                    .Select(x => x.GetViewModel)
                    .ToList();
            }

            
            return context.Orders
                .Where(x => x.Id == model.Id)
                .Select(x => x.GetViewModel)
                .ToList();
        }

        public List<OrderViewModel> GetFullList()
        {
            using var context = new SushiBarDatabase();

            return context.Orders
                .Select(x => x.GetViewModel)
                .ToList();
        }

        public OrderViewModel? Insert(OrderBindingModel model)
        {
            var newOrder = Order.Create(model);

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

            using var context = new SushiBarDatabase();

            context.Orders.Add(newOrder);
            context.SaveChanges();

            return newOrder.GetViewModel;
        }

        public OrderViewModel? Update(OrderBindingModel model)
        {
            using var context = new SushiBarDatabase();

            var order = context.Orders.FirstOrDefault(x => x.Id == model.Id);

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

            order.Update(model);
            context.SaveChanges();

            return order.GetViewModel;
        }
    }
}