PIbd-22_Romanov_E.V._SecuritySystem/SecuritySystemFileImplement/Implements/ManufactureStorage.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Numerics;
using System.Text;
using System.Threading.Tasks;

using SecuritySystemContracts.BindingModels;
using SecuritySystemContracts.SearchModels;
using SecuritySystemContracts.StoragesContracts;
using SecuritySystemContracts.ViewModels;
using SecuritySystemFileImplement.Models;
using SecuritySystemFileImplement;

namespace SecuritySystemFileImplement.Implements
{
    public class ManufactureStorage : IManufactureStorage
    {
        private readonly DataFileSingleton source;
        public ManufactureStorage()
        {
            source = DataFileSingleton.GetInstance();
        }
        public ManufactureViewModel? GetElement(ManufactureSearchModel model)
        {
            if (string.IsNullOrEmpty(model.ManufactureName) && !model.Id.HasValue)
            {
                return null;
            }
            return source.Manufactures.FirstOrDefault(x => (!string.IsNullOrEmpty(model.ManufactureName) && x.ManufactureName == model.ManufactureName) || (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
        }
        public List<ManufactureViewModel> GetFilteredList(ManufactureSearchModel model)
        {
            if (string.IsNullOrEmpty(model.ManufactureName))
            {
                return new();
            }
            return source.Manufactures
                .Where(x => x.ManufactureName.Contains(model.ManufactureName))
                .Select(x => x.GetViewModel)
                .ToList();
        }
        public List<ManufactureViewModel> GetFullList()
        {
            return source.Manufactures.Select(x => x.GetViewModel).ToList();
        }
        public ManufactureViewModel? Insert(ManufactureBindingModel model)
        {
            model.Id = source.Manufactures.Count > 0 ? source.Manufactures.Max(x => x.Id) + 1 : 1;
            var newManufacture = Manufacture.Create(model);
            if (newManufacture == null)
            {
                return null;
            }
            source.Manufactures.Add(newManufacture);
            source.SaveManufactures();
            return newManufacture.GetViewModel;
        }
        public ManufactureViewModel? Update(ManufactureBindingModel model)
        {
            var manufacture = source.Manufactures.FirstOrDefault(x => x.Id == model.Id);
            if (manufacture == null)
            {
                return null;
            }
            manufacture.Update(model);
            source.SaveManufactures();
            return manufacture.GetViewModel;
        }
        public ManufactureViewModel? Delete(ManufactureBindingModel model)
        {
            var manufacture = source.Manufactures.FirstOrDefault(x => x.Id == model.Id);
            if (manufacture == null)
            {
                return null;
            }
            manufacture.Update(model);
            source.SaveManufactures();
            return manufacture.GetViewModel;
        }

    }
}