step 1

Pizzeria/PizzeriaShopFileImplement/DataFileSingleton.cs

@@ -9,9 +9,11 @@ namespace PizzeriaFileImplement
         private readonly string ComponentFileName = "Component.xml";
         private readonly string OrderFileName = "Order.xml";
         private readonly string PizzaFileName = "Pizza.xml";
+        private readonly string ShopFileName = "Shop.xml";
         public List<Component> Components { get; private set; }
         public List<Order> Orders { get; private set; }
         public List<Pizza> Pizzas { get; private set; }
+        public List<Shop> Shops { get; private set; }
         public static DataFileSingleton GetInstance()
         {
             if (instance == null)
@@ -25,10 +27,9 @@ namespace PizzeriaFileImplement
         public void SaveOrders() => SaveData(Orders, OrderFileName, "Orders", x => x.GetXElement);
         private DataFileSingleton()
         {
-            Components = LoadData(ComponentFileName, "Component", x =>
+            Components = LoadData(ComponentFileName, "Component", x => Component.Create(x)!)!;
-           Component.Create(x)!)!;
+            Pizzas = LoadData(PizzaFileName, "Pizza", x => Pizza.Create(x)!)!;
-            Pizzas = LoadData(PizzaFileName, "Pizza", x =>
+            Shops = LoadData(ShopFileName, "Shop", x => Shop.Create(x)!)!;
-           Pizza.Create(x)!)!;
             Orders = LoadData(OrderFileName, "Order", x => Order.Create(x)!)!;
         }
         private static List<T>? LoadData<T>(string filename, string xmlNodeName, Func<XElement, T> selectFunction)

Pizzeria/PizzeriaShopFileImplement/Implements/ShopStorage.cs

@@ -0,0 +1,79 @@
+using PizzeriaContracts.BindingModels;
+using PizzeriaContracts.SearchModels;
+using PizzeriaContracts.StoragesContracts;
+using PizzeriaContracts.ViewModels;
+using PizzeriaFileImplement.models;
+
+namespace PizzeriaFileImplement.Implements
+{
+    public class ShopStorage : IShopStorage
+    {
+        private readonly DataFileSingleton source;
+        public ShopStorage()
+        {
+            source = DataFileSingleton.GetInstance();
+        }
+        public List<ShopViewModel> GetFullList()
+        {
+            return source.Shops
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+        public List<ShopViewModel> GetFilteredList(ShopSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.ShopName))
+            {
+                return new();
+            }
+            return source.Shops
+                .Where(x => x.ShopName.Contains(model.ShopName))
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+        public ShopViewModel? GetElement(ShopSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.ShopName) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            return source.Shops
+            .FirstOrDefault(x =>
+                (!string.IsNullOrEmpty(model.ShopName) && x.ShopName == model.ShopName) ||
+                (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
+        }
+        public ShopViewModel? Insert(ShopBindingModel model)
+        {
+            model.Id = source.Shops.Count > 0 ? source.Shops.Max(x => x.Id) + 1 : 1;
+            var newShop = Shop.Create(model);
+            if (newShop == null)
+            {
+                return null;
+            }
+            source.Shops.Add(newShop);
+            source.SaveData();
+            return newShop.GetViewModel;
+        }
+        public ShopViewModel? Update(ShopBindingModel model)
+        {
+            var shop = source.Shops.FirstOrDefault(x => x.Id == model.Id);
+            if (shop == null)
+            {
+                return null;
+            }
+            shop.Update(model);
+            source.SaveData();
+            return shop.GetViewModel;
+        }
+        public ShopViewModel? Delete(ShopBindingModel model)
+        {
+            var element = source.Shops.FirstOrDefault(x => x.Id == model.Id);
+            if (element != null)
+            {
+                source.Shops.Remove(element);
+                source.SaveData();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+    }
+}

Pizzeria/PizzeriaShopFileImplement/models/Shop.cs

@@ -0,0 +1,93 @@
+using PizzeriaContracts.BindingModels;
+using PizzeriaContracts.ViewModels;
+using PizzeriaDataModels;
+using System.Xml.Linq;
+
+namespace PizzeriaFileImplement.models
+{
+    public class Shop : IShopModel
+    {
+        public int Id { get; set; }
+        public string ShopName { get; set; } = string.Empty;
+        public string Addres { get; set; } = string.Empty;
+        public DateTime OpenTime { get; set; }
+        public Dictionary<int, int> Pizzas { get; private set; } = new();
+        private Dictionary<int, (IPizzaModel, int)>? _shopPizzas = null;
+        public Dictionary<int, (IPizzaModel, int)> ShopPizzas
+        {
+            get
+            {
+                if (_shopPizzas == null)
+                {
+                    var source = DataFileSingleton.GetInstance();
+                    _shopPizzas = Pizzas.ToDictionary(x => x.Key, y =>
+                    ((source.Components.FirstOrDefault(z => z.Id == y.Key) as IPizzaModel)!,
+                    y.Value));
+                }
+                return _shopPizzas;
+            }
+        }
+
+        public static Shop? Create(ShopBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Shop()
+            {
+                Id = model.Id,
+                ShopName = model.ShopName,
+                Addres = model.Addres,
+                OpenTime = model.OpenTime,
+                Pizzas = model.ShopPizzas.ToDictionary(x => x.Key, x => x.Value.Item2)
+            };
+        }
+        public static Shop? Create(XElement element)
+        {
+            if (element == null)
+            {
+                return null;
+            }
+            return new Shop()
+            {
+                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
+                ShopName = element.Element("ShopName")!.Value,
+                Addres = element.Element("Price")!.Value,
+                Pizzas = element.Element("ShopPizzas")!.Elements("ShopPizza")
+                    .ToDictionary(
+                        x => Convert.ToInt32(x.Element("Key")?.Value),
+                        x => Convert.ToInt32(x.Element("Value")?.Value))
+            };
+        }
+        public void Update(ShopBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            ShopName = model.ShopName;
+            Addres = model.Addres;
+            OpenTime = model.OpenTime;
+            Pizzas = model.ShopPizzas.ToDictionary(x => x.Key, x => x.Value.Item2);
+            _shopPizzas = null;
+        }
+        public ShopViewModel GetViewModel => new()
+        {
+            Id = Id,
+            ShopName = ShopName,
+            Addres = Addres,
+            OpenTime = OpenTime,
+            ShopPizzas = ShopPizzas
+        };
+        public XElement GetXElement => new("Shop",
+        new XAttribute("Id", Id),
+        new XElement("ShopName", ShopName),
+        new XElement("Addres", Addres),
+        new XElement("ShopPizzas", Pizzas.Select(x =>
+        new XElement("ShopPizza",
+        new XElement("Key", x.Key),
+        new XElement("Value", x.Value)))
+        .ToArray()));
+    }
+}