Gismatullin.ISEbd-21.STO.CourseWork/ServiceStation/ServiceStationsDataBaseImplement/Implements/WorkStorage.cs

using ServiceStationContracts.BindingModels;
using ServiceStationContracts.SearchModels;
using ServiceStationContracts.ViewModels;
using ServiceStationsContracts.StorageContracts;
using ServiceStationsDataBaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ServiceStationsDataBaseImplement.Implements
{
    public class WorkStorage : IWorkStorage
    {
        public WorkViewModel? Delete(WorkBindingModel model)
        {
            using var context = new Database();
            var element = context.Works.FirstOrDefault(rec => rec.Id == model.ID);
            if (element != null)
            {
                context.Works.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }

        public WorkViewModel? GetElement(WorkSearchModel model)
        {
            if (!model.Id.HasValue)
            {
                return null;
            }
            using var context = new Database();
            return context.Works.FirstOrDefault(x =>
            (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
        }

        public List<WorkViewModel> GetFilteredList(WorkSearchModel model)
        {
            if (!model.Id.HasValue)
            {
                return new();
            }
            using var context = new Database();
            return context.Works.Where(x => x.Id == model.Id).Select(x => x.GetViewModel).ToList();
        }

        public List<WorkViewModel> GetFullList()
        {
            using var context = new Database();
            return context.Works.Select(x => x.GetViewModel).ToList();
        }

        public WorkViewModel? Insert(WorkBindingModel model)
        {
            var newComponent = Work.Create(model);
            if (newComponent == null)
            {
                return null;
            }
            using var context = new Database();
            context.Works.Add(newComponent);
            context.SaveChanges();
            return newComponent.GetViewModel;
        }

        public WorkViewModel? Update(WorkBindingModel model)
        {
            using var context = new Database();
            var component = context.Works.FirstOrDefault(x => x.Id == model.ID);
            if (component == null)
            {
                return null;
            }
            component.Update(model);
            context.SaveChanges();
            return component.GetViewModel;
        }
    }
}