PIbd-31_MasenkinMS_COP_22/Components/DatabaseImplement/Implements/OrderStorage.cs

using Contracts.BindingModels;
using Contracts.SearchModels;
using Contracts.StoragesContracts;
using Contracts.ViewModels;
using DatabaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DatabaseImplement.Implements
{
    /// <summary>
    /// Хранилище для сущности "Счет"
    /// </summary>
    public class OrderStorage : IOrderStorage
    {
        /// <summary>
        /// Получить полный список элементов
        /// </summary>
        /// <returns></returns>
        public List<OrderViewModel> GetFullList()
        {
            using var context = new Database();
            return context.Orders
                .Select(x => x.GetViewModel)
                .ToList();
        }

        /// <summary>
        /// Получить фильтрованный список элементов
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
        {
            using var context = new Database();
            // Фильтрация по ФИО официанта
            if (!string.IsNullOrEmpty(model.WaiterFullName))
            {
                return context.Orders
                    .Where(x => x.WaiterFullName.Contains(model.WaiterFullName))
                    .Select(x => x.GetViewModel)
                    .ToList();
            }

            // Фильтрация по типу заказа
            if (!string.IsNullOrEmpty(model.Type))
            {
                return context.Orders
                    .Where(x => x.Type.Contains(model.Type))
                    .Select(x => x.GetViewModel)
                    .ToList();
            }

            return new();
        }

        /// <summary>
        /// Получить элемент
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public OrderViewModel? GetElement(OrderSearchModel model)
        {
            using var context = new Database();
            if (model.Id.HasValue)
            {
                return context.Orders
                    .FirstOrDefault(x => x.Id.Equals(model.Id))
                    ?.GetViewModel;
            }

            return null;
        }

        /// <summary>
        /// Добавить элемент
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public OrderViewModel? Insert(OrderBindingModel model)
        {
            using var context = new Database();
            var newOrder = Order.Create(model);
            if (newOrder == null)
            {
                return null;
            }

            context.Orders.Add(newOrder);
            context.SaveChanges();
            return newOrder.GetViewModel;
        }

        /// <summary>
        /// Редактировать элемент
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public OrderViewModel? Update(OrderBindingModel model)
        {
            using var context = new Database();
            var order = context.Orders
                .FirstOrDefault(x => x.Id.Equals(model.Id));
            if (order == null)
            {
                return null;
            }

            order.Update(model);
            context.SaveChanges();
            return order.GetViewModel;
        }

        /// <summary>
        /// Удалить элемент
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public OrderViewModel? Delete(OrderBindingModel model)
        {
            using var context = new Database();
            var order = context.Orders
                .FirstOrDefault(x => x.Id.Equals(model.Id));
            if (order == null)
            {
                return null;
            }

            context.Orders.Remove(order);
            context.SaveChanges();
            return order.GetViewModel;
        }
    }
}