ISEbd-21_KashtanovD.A.FishFactory/FishFactory/FishFactoryFileImplement/Implements/OrderStorage.cs

using FishFactoryContracts.BindingModels;
using FishFactoryContracts.SearchModels;
using FishFactoryContracts.StoragesContracts;
using FishFactoryContracts.ViewModels;
using FishFactoryFileImplement.Models;

namespace FishFactoryFileImplement.Implements
{
    public class OrderStorage : IOrderStorage
    {
        private readonly DataFileSingleton source;

        public OrderStorage()
        {
            source = DataFileSingleton.GetInstance();
        }

        public List<OrderViewModel> GetFullList() => source.Orders.Select(x => AttachCannedName(x.GetViewModel)).ToList();

        public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
        {
            if (!model.Id.HasValue || !model.DateFrom.HasValue || !model.DateTo.HasValue)
            {
                return new();
            }
            return source.Orders.Where(x => x.DateCreate >= model.DateFrom && x.DateCreate <= model.DateTo).Select(x => AttachCannedName(x.GetViewModel)).ToList();
        }

        public OrderViewModel? GetElement(OrderSearchModel model)
        {
            if (!model.Id.HasValue)
            {
                return new();
            }
            return AttachCannedName(source.Orders.FirstOrDefault(x => x.Id == model.Id)?.GetViewModel);
        }

        public OrderViewModel? Insert(OrderBindingModel model)
        {
            model.Id = source.Orders.Count > 0 ? source.Orders.Max(x => x.Id) + 1 : 1;
            var newOrder = Order.Create(model);
            if (newOrder == null)
            {
                return null;
            }
            source.Orders.Add(newOrder);
            source.SaveOrders();
            return AttachCannedName(newOrder.GetViewModel);
        }

        public OrderViewModel? Update(OrderBindingModel model)
        {
            var order = source.Orders.FirstOrDefault(x => x.Id == model.Id);
            if (order == null)
            {
                return null;
            }
            order.Update(model);
            source.SaveOrders();
            return AttachCannedName(order.GetViewModel);
        }

        public OrderViewModel? Delete(OrderBindingModel model)
        {
            var order = source.Orders.FirstOrDefault(x => x.Id == model.Id);
            if (order != null)
            {
                source.Orders.Remove(order);
                source.SaveOrders();
                return AttachCannedName(order.GetViewModel);
            }
            return null;
        }

        private OrderViewModel? AttachCannedName(OrderViewModel? model)
        {
            if (model == null)
            {
                return null;
            }
            var canned = source.Canneds.FirstOrDefault(x => x.Id == model.CannedId);
                model.CannedName = canned?.CannedName;
            return model;
        }
    }

}