Done

Diner/Diner.sln

@@ -13,6 +13,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "DinerBusinessLogic", "..\Ab
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "DinerListImplement", "AbstractShopListImplement\DinerListImplement.csproj", "{A24E7474-4B43-4E81-A6BF-2B7323D5C26A}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DinerFileImplement", "DinerFileImplement\DinerFileImplement.csproj", "{BF814E5C-E62C-4BFC-9B14-3D2F97F21CE6}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -39,6 +41,10 @@ Global
 		{A24E7474-4B43-4E81-A6BF-2B7323D5C26A}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{A24E7474-4B43-4E81-A6BF-2B7323D5C26A}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{A24E7474-4B43-4E81-A6BF-2B7323D5C26A}.Release|Any CPU.Build.0 = Release|Any CPU
+		{BF814E5C-E62C-4BFC-9B14-3D2F97F21CE6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{BF814E5C-E62C-4BFC-9B14-3D2F97F21CE6}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{BF814E5C-E62C-4BFC-9B14-3D2F97F21CE6}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{BF814E5C-E62C-4BFC-9B14-3D2F97F21CE6}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

Diner/Diner/DinerView.csproj

@@ -15,6 +15,7 @@
   <ItemGroup>
     <ProjectReference Include="..\..\AbstractShopBusinessLogic\DinerBusinessLogic.csproj" />
     <ProjectReference Include="..\AbstractShopListImplement\DinerListImplement.csproj" />
+    <ProjectReference Include="..\DinerFileImplement\DinerFileImplement.csproj" />
   </ItemGroup>
 
 </Project>

Diner/Diner/Program.cs

@@ -1,6 +1,6 @@
 using DinerContracts.BusinessLogicsContracts;
 using DinerContracts.StoragesContracts;
-using DinerListImplement.Implements;
+using DinerFileImplement.Implements;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 using NLog.Extensions.Logging;

Diner/DinerFileImplement/DataFileSingleton.cs

@@ -0,0 +1,48 @@
+using DinerFileImplement.Models;
+using System.Xml.Linq;
+
+namespace DinerFileImplement
+{
+    internal class DataFileSingleton
+    {
+        private static DataFileSingleton? instance;
+        private readonly string ComponentFileName = "Component.xml";
+        private readonly string OrderFileName = "Order.xml";
+        private readonly string ProductFileName = "Snack.xml";
+        public List<Component> Components { get; private set; }
+        public List<Order> Orders { get; private set; }
+        public List<Snack> Snacks { get; private set; }
+        public static DataFileSingleton GetInstance()
+        {
+            if (instance == null)
+            {
+                instance = new DataFileSingleton();
+            }
+            return instance;
+        }
+        public void SaveComponents() => SaveData(Components, ComponentFileName, "Components", x => x.GetXElement);
+        public void SaveSnacks() => SaveData(Snacks, ProductFileName, "Snacks", x => x.GetXElement);
+        public void SaveOrders() => SaveData(Orders, OrderFileName, "Orders", x => x.GetXElement);
+        private DataFileSingleton()
+        {
+            Components = LoadData(ComponentFileName, "Component", x => Component.Create(x)!)!;
+            Snacks = LoadData(ProductFileName, "Snack", x => Snack.Create(x)!)!;
+            Orders = LoadData(OrderFileName, "Order", x => Order.Create(x)!)!;
+        }
+        private static List<T>? LoadData<T>(string filename, string xmlNodeName, Func<XElement, T> selectFunction)
+        {
+            if (File.Exists(filename))
+            {
+                return XDocument.Load(filename)?.Root?.Elements(xmlNodeName)?.Select(selectFunction)?.ToList();
+            }
+            return new List<T>();
+        }
+        private static void SaveData<T>(List<T> data, string filename, string xmlNodeName, Func<T, XElement> selectFunction)
+        {
+            if (data != null)
+            {
+                new XDocument(new XElement(xmlNodeName, data.Select(selectFunction).ToArray())).Save(filename);
+            }
+        }
+    }
+}

Diner/DinerFileImplement/DinerFileImplement.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\AbstractShopContracts\DinerContracts.csproj" />
+    <ProjectReference Include="..\..\AbstractShopDataModels\DinerDataModels.csproj" />
+  </ItemGroup>
+
+</Project>

Diner/DinerFileImplement/Implements/ComponentStorage.cs

@@ -0,0 +1,83 @@
+using DinerContracts.BindingModels;
+using DinerContracts.SearchModels;
+using DinerContracts.StoragesContracts;
+using DinerContracts.ViewModels;
+using DinerFileImplement.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DinerFileImplement.Implements
+{
+    public class ComponentStorage : IComponentStorage
+    {
+        private readonly DataFileSingleton source;
+        public ComponentStorage()
+        {
+            source = DataFileSingleton.GetInstance();
+        }
+        public List<ComponentViewModel> GetFullList()
+        {
+            return source.Components
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+        public List<ComponentViewModel> GetFilteredList(ComponentSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.ComponentName))
+            {
+                return new();
+            }
+            return source.Components
+                .Where(x => x.ComponentName.Contains(model.ComponentName))
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+        public ComponentViewModel? GetElement(ComponentSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.ComponentName) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            return source.Components
+                .FirstOrDefault(x => (!string.IsNullOrEmpty(model.ComponentName) && x.ComponentName == model.ComponentName) ||
+                   (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
+        }
+        public ComponentViewModel? Insert(ComponentBindingModel model)
+        {
+            model.Id = source.Components.Count > 0 ? source.Components.Max(x => x.Id) + 1 : 1;
+            var newComponent = Component.Create(model);
+            if (newComponent == null)
+            {
+                return null;
+            }
+            source.Components.Add(newComponent);
+            source.SaveComponents();
+            return newComponent.GetViewModel;
+        }
+        public ComponentViewModel? Update(ComponentBindingModel model)
+        {
+            var component = source.Components.FirstOrDefault(x => x.Id == model.Id);
+            if (component == null)
+            {
+                return null;
+            }
+            component.Update(model);
+            source.SaveComponents();
+            return component.GetViewModel;
+        }
+        public ComponentViewModel? Delete(ComponentBindingModel model)
+        {
+            var element = source.Components.FirstOrDefault(x => x.Id == model.Id);
+            if (element != null)
+            {
+                source.Components.Remove(element);
+                source.SaveComponents();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+    }
+}

Diner/DinerFileImplement/Implements/OrderStorage.cs

@@ -0,0 +1,93 @@
+using DinerContracts.BindingModels;
+using DinerContracts.SearchModels;
+using DinerContracts.StoragesContracts;
+using DinerContracts.ViewModels;
+using DinerFileImplement.Models;
+
+namespace DinerFileImplement.Implements
+{
+    public class OrderStorage : IOrderStorage
+    {
+        private readonly DataFileSingleton source;
+        public OrderStorage()
+        {
+            source = DataFileSingleton.GetInstance();
+        }
+        public OrderViewModel? Delete(OrderBindingModel model)
+        {
+            var element = source.Orders.FirstOrDefault(x => x.Id == model.Id);
+            if (element != null)
+            {
+                source.Orders.Remove(element);
+                source.SaveOrders();
+
+                return AttachSnackName(element.GetViewModel);
+            }
+            return null;
+        }
+
+        public OrderViewModel? GetElement(OrderSearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return null;
+            }
+            return AttachSnackName(source.Orders.FirstOrDefault(x => (model.Id.HasValue && x.Id == model.Id))?.GetViewModel);
+        }
+
+        public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return new();
+            }
+            return source.Orders.Where(x => x.Id == model.Id)
+                                .Select(x => AttachSnackName(x.GetViewModel))
+                                .ToList();
+        }
+
+        public List<OrderViewModel> GetFullList()
+        {
+            return source.Orders
+                .Select(x => AttachSnackName(x.GetViewModel)).ToList();
+        }
+
+        public OrderViewModel? Insert(OrderBindingModel model)
+        {
+            model.Id = source.Orders.Count > 0 ? source.Orders.Max(x => x.Id) + 1 : 1;
+            var newOrder = Order.Create(model);
+            if (newOrder == null)
+            {
+                return null;
+            }
+            source.Orders.Add(newOrder);
+            source.SaveOrders();
+            return AttachSnackName(newOrder.GetViewModel);
+        }
+
+        public OrderViewModel? Update(OrderBindingModel model)
+        {
+            var order = source.Orders.FirstOrDefault(x => x.Id == model.Id);
+            if (order == null)
+            {
+                return null;
+            }
+            order.Update(model);
+            source.SaveOrders();
+            return AttachSnackName(order.GetViewModel);
+        }
+        private OrderViewModel? AttachSnackName(OrderViewModel? model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            var snack = source.Snacks.FirstOrDefault(x => x.Id == model.SnackId);
+            if (snack != null)
+            {
+                model.SnackName = snack.SnackName;
+            }
+            return model;
+        }
+    }
+}

Diner/DinerFileImplement/Implements/SnackStorage.cs

@@ -0,0 +1,85 @@
+using DinerContracts.BindingModels;
+using DinerContracts.SearchModels;
+using DinerContracts.StoragesContracts;
+using DinerContracts.ViewModels;
+using DinerFileImplement.Models;
+
+namespace DinerFileImplement.Implements
+{
+    public class SnackStorage : ISnackStorage
+    {
+        private readonly DataFileSingleton source;
+        public SnackStorage()
+        {
+            source = DataFileSingleton.GetInstance();
+        }
+        public SnackViewModel? Delete(SnackBindingModel model)
+        {
+            var element = source.Snacks.FirstOrDefault(x => x.Id == model.Id);
+            if (element != null)
+            {
+                source.Snacks.Remove(element);
+                source.SaveSnacks();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+
+        public SnackViewModel? GetElement(SnackSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.SnackName) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            return source.Snacks
+                .FirstOrDefault(x => (!string.IsNullOrEmpty(model.SnackName) && x.SnackName == model.SnackName) ||
+                   (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
+        }
+
+        public List<SnackViewModel> GetFilteredList(SnackSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.SnackName))
+            {
+                return new();
+            }
+            return source.Snacks
+                .Where(x => x.SnackName.Contains(model.SnackName))
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+
+        public List<SnackViewModel> GetFullList()
+        {
+            return source.Snacks
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+
+        public SnackViewModel? Insert(SnackBindingModel model)
+        {
+            model.Id = source.Snacks.Count > 0 ? source.Snacks.Max(x => x.Id) + 1 : 1;
+            var newSnack = Snack.Create(model);
+            if (newSnack == null)
+            {
+                return null;
+            }
+            source.Snacks.Add(newSnack);
+            source.SaveSnacks();
+            return newSnack.GetViewModel;
+        }
+
+        public SnackViewModel? Update(SnackBindingModel model)
+        {
+            var element = source.Snacks.FirstOrDefault(x => x.Id == model.Id);
+            if (element == null)
+            {
+                return null;
+            }
+
+            element.Update(model);
+            source.SaveSnacks();
+
+            return element.GetViewModel;
+        }
+    }
+}

Diner/DinerFileImplement/Models/Component.cs

@@ -0,0 +1,59 @@
+using DinerContracts.BindingModels;
+using DinerContracts.ViewModels;
+using DinerDataModels.Models;
+using System.Xml.Linq;
+
+namespace DinerFileImplement.Models
+{
+    public class Component : IComponentModel
+    {
+        public int Id { get; private set; }
+        public string ComponentName { get; private set; } = string.Empty;
+        public double Cost { get; set; }
+        public static Component? Create(ComponentBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Component()
+            {
+                Id = model.Id,
+                ComponentName = model.ComponentName,
+                Cost = model.Cost
+            };
+        }
+        public static Component? Create(XElement element)
+        {
+            if (element == null)
+            {
+                return null;
+            }
+            return new Component()
+            {
+                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
+                ComponentName = element.Element("ComponentName")!.Value,
+                Cost = Convert.ToDouble(element.Element("Cost")!.Value)
+            };
+        }
+        public void Update(ComponentBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            ComponentName = model.ComponentName;
+            Cost = model.Cost;
+        }
+        public ComponentViewModel GetViewModel => new()
+        {
+            Id = Id,
+            ComponentName = ComponentName,
+            Cost = Cost
+        };
+        public XElement GetXElement => new("Component",
+            new XAttribute("Id", Id),
+            new XElement("ComponentName", ComponentName),
+            new XElement("Cost", Cost.ToString()));
+    }
+}

Diner/DinerFileImplement/Models/Order.cs

@@ -0,0 +1,89 @@
+using DinerContracts.BindingModels;
+using DinerContracts.ViewModels;
+using DinerDataModels.Enum;
+using DinerDataModels.Models;
+using System.Xml.Linq;
+
+namespace DinerFileImplement.Models
+{
+    public class Order : IOrderModel
+    {
+        public int Id { get; private set; }
+        public int SnackID { get; private set; }
+
+        public int Count { get; private set; }
+
+        public double Sum { get; private set; }
+
+        public OrderStatus Status { get; private set; }
+
+        public DateTime DateCreate { get; private set; }
+
+        public DateTime? DateImplement { get; private set; }
+        public static Order? Create(OrderBindingModel? model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Order()
+            {
+                Id = model.Id,
+                SnackID = model.SnackId,
+                Count = model.Count,
+                Sum = model.Sum,
+                Status = model.Status,
+                DateCreate = model.DateCreate,
+                DateImplement = model.DateImplement
+            };
+        }
+        public static Order? Create(XElement element)
+        {
+            if (element == null)
+            {
+                return null;
+            }
+            var order = new Order()
+            {
+                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
+                SnackID = Convert.ToInt32(element.Element("SnackID")!.Value),
+                Count = Convert.ToInt32(element.Element("Count")!.Value),
+                Sum = Convert.ToDouble(element.Element("Sum")!.Value),
+                Status = (OrderStatus)Enum.Parse(typeof(OrderStatus), element.Element("Status")!.Value),
+                DateCreate = Convert.ToDateTime(element.Element("DateCreate")!.Value),
+            };
+            DateTime.TryParse(element.Element("DateImplement")!.Value, out DateTime _dateImplement);
+            order.DateImplement = _dateImplement;
+            return order;
+        }
+        public void Update(OrderBindingModel? model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+
+            Status = model.Status;
+            DateImplement = model.DateImplement;
+        }
+        public OrderViewModel GetViewModel => new()
+        {
+            Id = Id,
+            SnackId = SnackID,
+            Count = Count,
+            Sum = Sum,
+            Status = Status,
+            DateCreate = DateCreate,
+            DateImplement = DateImplement
+        };
+        public XElement GetXElement => new("Order",
+            new XAttribute("Id", Id),
+            new XElement("SnackID", SnackID.ToString()),
+            new XElement("Count", Count.ToString()),
+            new XElement("Sum", Sum.ToString()),
+            new XElement("Status", Status.ToString()),
+            new XElement("DateCreate", DateCreate.ToString()),
+            new XElement("DateImplement", DateImplement?.ToString())
+            );
+    }
+}

Diner/DinerFileImplement/Models/Snack.cs

@@ -0,0 +1,86 @@
+using DinerContracts.BindingModels;
+using DinerContracts.ViewModels;
+using DinerDataModels.Models;
+using System.Xml.Linq;
+
+namespace DinerFileImplement.Models
+{
+    public class Snack : ISnackModel
+    {
+        public int Id { get; private set; }
+        public string SnackName { get; private set; } = string.Empty;
+        public double Price { get; private set; }
+        public Dictionary<int, int> Components { get; private set; } = new();
+        private Dictionary<int, (IComponentModel, int)>? _snackComponents = null;
+        public Dictionary<int, (IComponentModel, int)> SnackComponents
+        {
+            get
+            {
+                if (_snackComponents == null)
+                {
+                    var source = DataFileSingleton.GetInstance();
+                    _snackComponents = Components.ToDictionary(x => x.Key, y => ((source.Components.FirstOrDefault(z => z.Id == y.Key) as IComponentModel)!, y.Value));
+                }
+                return _snackComponents;
+            }
+        }
+        public static Snack? Create(SnackBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Snack()
+            {
+                Id = model.Id,
+                SnackName = model.SnackName,
+                Price = model.Price,
+                Components = model.SnackComponents.ToDictionary(x => x.Key, x => x.Value.Item2)
+            };
+        }
+        public static Snack? Create(XElement element)
+        {
+            if (element == null)
+            {
+                return null;
+            }
+            return new Snack()
+            {
+                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
+                SnackName = element.Element("SnackName")!.Value,
+                Price = Convert.ToDouble(element.Element("Price")!.Value),
+                Components = element.Element("SnackComponents")!.Elements("SnackComponent")
+                    .ToDictionary(x =>
+                    Convert.ToInt32(x.Element("Key")?.Value), x =>
+                    Convert.ToInt32(x.Element("Value")?.Value))
+            };
+        }
+        public void Update(SnackBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            SnackName = model.SnackName;
+            Price = model.Price;
+            Components = model.SnackComponents.ToDictionary(x => x.Key, x => x.Value.Item2);
+            _snackComponents = null;
+        }
+        public SnackViewModel GetViewModel => new()
+        {
+            Id = Id,
+            SnackName = SnackName,
+            Price = Price,
+            SnackComponents = SnackComponents
+        };
+        public XElement GetXElement => new("Snack",
+            new XAttribute("Id", Id),
+            new XElement("SnackName", SnackName),
+            new XElement("Price", Price.ToString()),
+            new XElement("SnackComponents", Components.Select(x =>
+            new XElement("SnackComponent",
+            new XElement("Key", x.Key),
+            new XElement("Value", x.Value)))
+            .ToArray()));
+    }
+}