ISEbd-21_Koscheev.M.S.SoftwareInstallation/SoftwareInstallation/SoftWareInstallationFileImplement/OrderStorage.cs

using SoftwareInstallationContracts.BindingModels;
using SoftwareInstallationContracts.SearchModels;
using SoftwareInstallationContracts.StoragesContracts;
using SoftwareInstallationContracts.ViewModels;
using SoftwareInstallationFileImplement.Models;

namespace SoftwareInstallationFileImplement.Implements
{
    public class OrderStorage : IOrderStorage
    {
        private readonly DataFileSingleton _source;
        public OrderStorage()
        {
            _source = DataFileSingleton.GetInstance();
        }
        public OrderViewModel? Delete(OrderBindingModel model)
        {
            var element = _source.Orders.FirstOrDefault(x => x.Id == model.Id);
            if (element != null)
            {
                _source.Orders.Remove(element);
                _source.SaveOrders();
                return element.GetViewModel;
            }
            return null;
        }
        public OrderViewModel? GetElement(OrderSearchModel model)
        {
            if (!model.Id.HasValue)
            {
                return null;
            }
            return _source.Orders.FirstOrDefault(x => model.Id.HasValue && x.Id == model.Id)?.GetViewModel;
        }
        public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
        {
            var result = GetElement(model);
            return result != null ? new() { result } : new();
        }
        public List<OrderViewModel> GetFullList()
        {
            var a = new List<OrderViewModel>();
            //var result = _source.Orders
            //    .Select(x => x.GetViewModel)
            //    .ToList();
            //TODO
            foreach (var order in _source.Orders)
            {
                a.Add(GetViewModel(order));
            }
            return a;
        }
        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 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 order.GetViewModel;
        }
        private OrderViewModel GetViewModel(Order model)
        {
            var res = model.GetViewModel;
            foreach (var package in _source.Packages)
            {
                if (package.Id == model.PackageId)
                {
                    res.PackageName = package.PackageName;
                    break;
                }
            }
            return res;
        }
    }
}