COP_labs/OnlineStoreDatabase/Storages/StatusStorage.cs

using OnlineShopContracts.BindingModels;
using OnlineShopContracts.ViewModels;
using OnlineShopDatabase.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace OnlineShopDatabase.Storages
{
    public class StatusStorage
    {
        public List<StatusViewModel> GetFullList()
        {
            using var context = new OnlineShopDatabase();
            return context.Statuses.Select(x => x.GetViewModel).ToList();
        }
        public List<StatusViewModel> GetFilteredList(StatusBindingModel model)
        {
            using var context = new OnlineShopDatabase();
            //поиск по названию статуса
            if (!string.IsNullOrEmpty(model.Name))
            {
                return context.Statuses
                    .Where(x => x.Name == model.Name)    
                    .Select(x => x.GetViewModel)
                    .ToList();
            }
            return new();
        }

        //получение по id статуса
        public StatusViewModel? GetElement(StatusBindingModel model)
        {
            if (!model.Id.HasValue)
            {
                return null;
            }
            using var context = new OnlineShopDatabase();
            return context.Statuses.FirstOrDefault(x => x.Id == model.Id)?.GetViewModel;
        }

        public bool Insert(StatusBindingModel model)
        {
            var newStatus = Status.Create(model);

            if (newStatus == null)
            {
                return false;
            }
            using var context = new OnlineShopDatabase();
            using var transaction = context.Database.BeginTransaction();
            try
            {
                context.Statuses.Add(newStatus);
                context.SaveChanges();
                transaction.Commit();
                return true;
            }
            catch (Exception ex)
            {
                transaction.Rollback();
                return false;
                throw;
            }
        }

        public bool Update(StatusBindingModel model)
        {
            using var context = new OnlineShopDatabase();
            using var transaction = context.Database.BeginTransaction();
            try
            {
                var status = context.Statuses.FirstOrDefault(x => x.Id == model.Id);
                if (status == null)
                {
                    throw new Exception("Статус не найден");
                }
                status.Update(model);
                context.SaveChanges();
                transaction.Commit();
                return true;
            }
            catch
            {
                transaction.Rollback();
                return false;
            }
        }

        public bool Delete(StatusBindingModel model)
        {
            using var context = new OnlineShopDatabase();
            using var transaction = context.Database.BeginTransaction();
            try
            {
                var status = context.Statuses.FirstOrDefault(rec => rec.Id == model.Id);
                if (status == null)
                {
                    throw new Exception("Статус не найден");
                }
                context.Statuses.Remove(status);
                context.SaveChanges();
                transaction.Commit();
                return true;
            }
            catch
            {
                transaction.Rollback();
                return false;
            }
        }
    }
}