PIbd-21_BatylkinaAO_MusoevDT_Canteen/Canteen/CanteenDatabaseImplement/Implements/TablewareStorage.cs

using CanteenContracts.BindingModels;
using CanteenContracts.SearchModel;
using CanteenContracts.StoragesContracts;
using CanteenContracts.View;
using CanteenDatabaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CanteenDatabaseImplement.Implements
{
    public class TablewareStorage : ITablewareStorage
    {
        public TablewareViewModel? GetElement(TablewareSearchModel model)
        {
            if (!model.Id.HasValue && string.IsNullOrEmpty(model.TablewareName))
            {
                return null;
            }

            using var context = new CanteenDatabase();

            return context.Tablewares.FirstOrDefault(x => (model.Id.HasValue && x.Id == model.Id) || (!string.IsNullOrEmpty(model.TablewareName) && x.TablewareName == model.TablewareName))?.GetViewModel;
        }

        public List<TablewareViewModel> GetFilteredList(TablewareSearchModel model)
        {
            if (!model.VisitorId.HasValue)
            {
                return new();
            }
            using var context = new CanteenDatabase();

            return context.Tablewares
                .Where(x => (model.Id.HasValue && x.Id == model.Id) || (model.VisitorId.HasValue && model.VisitorId == x.VisitorId))
                .Select(x => x.GetViewModel).ToList();
        }

        public List<TablewareViewModel> GetFullList()
        {
            using var context = new CanteenDatabase();
            return context.Tablewares.Select(x => x.GetViewModel).ToList();
        }

        public TablewareViewModel? Insert(TablewareBindingModel model)
        {
            var newTableware = Tableware.Create(model);
            if (newTableware == null)
            {
                return null;
            }

            using var context = new CanteenDatabase();

            context.Tablewares.Add(newTableware);
            context.SaveChanges();

            return newTableware.GetViewModel;
        }

        public TablewareViewModel? Update(TablewareBindingModel model)
        {
            using var context = new CanteenDatabase();

            var cook = context.Tablewares.FirstOrDefault(x => x.Id == model.Id);
            if (cook == null)
            {
                return null;
            }

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

            return cook.GetViewModel;
        }

        public TablewareViewModel? Delete(TablewareBindingModel model)
        {
            using var context = new CanteenDatabase();

            var cook = context.Tablewares.FirstOrDefault(x => x.Id == model.Id);
            if (cook != null)
            {
                context.Tablewares.Remove(cook);
                context.SaveChanges();

                return cook.GetViewModel;
            }

            return null;
        }
    }
}