diff --git a/BlacksmithWorkshop/BlacksmithWorkshop.sln b/BlacksmithWorkshop/BlacksmithWorkshop.sln
index 57e91a7..6df9da0 100644
--- a/BlacksmithWorkshop/BlacksmithWorkshop.sln
+++ b/BlacksmithWorkshop/BlacksmithWorkshop.sln
@@ -13,6 +13,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "BlacksmithWorkshopBusinessL
EndProject
Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "BlacksmithWorkshopListImplement", "BlacksmithWorkshopListImplement\BlacksmithWorkshopListImplement.csproj", "{D57FFF62-0A87-4995-9693-317A94689469}"
EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BlacksmithWorkshopFileImplement", "BlacksmithWorkshopFileImplement\BlacksmithWorkshopFileImplement.csproj", "{A955973A-2C00-4AEC-B105-B2024F6CC11E}"
+EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
@@ -39,6 +41,10 @@ Global
{D57FFF62-0A87-4995-9693-317A94689469}.Debug|Any CPU.Build.0 = Debug|Any CPU
{D57FFF62-0A87-4995-9693-317A94689469}.Release|Any CPU.ActiveCfg = Release|Any CPU
{D57FFF62-0A87-4995-9693-317A94689469}.Release|Any CPU.Build.0 = Release|Any CPU
+ {A955973A-2C00-4AEC-B105-B2024F6CC11E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {A955973A-2C00-4AEC-B105-B2024F6CC11E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {A955973A-2C00-4AEC-B105-B2024F6CC11E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {A955973A-2C00-4AEC-B105-B2024F6CC11E}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
diff --git a/BlacksmithWorkshop/BlacksmithWorkshop/BlacksmithWorkshopView.csproj b/BlacksmithWorkshop/BlacksmithWorkshop/BlacksmithWorkshopView.csproj
index 197531c..55b8a2d 100644
--- a/BlacksmithWorkshop/BlacksmithWorkshop/BlacksmithWorkshopView.csproj
+++ b/BlacksmithWorkshop/BlacksmithWorkshop/BlacksmithWorkshopView.csproj
@@ -26,6 +26,7 @@
+
diff --git a/BlacksmithWorkshop/BlacksmithWorkshop/Program.cs b/BlacksmithWorkshop/BlacksmithWorkshop/Program.cs
index 8716cd5..49a2371 100644
--- a/BlacksmithWorkshop/BlacksmithWorkshop/Program.cs
+++ b/BlacksmithWorkshop/BlacksmithWorkshop/Program.cs
@@ -1,7 +1,7 @@
using BlacksmithWorkShopBusinessLogic.BusinessLogics;
using BlacksmithWorkshopContracts.BusinessLogicContracts;
using BlacksmithWorkshopContracts.StoragesContracts;
-using BlacksmithWorkshopListImplement.Implements;
+using BlacksmithWorkshopFileImplement.Implements;
using BlacksmithWorkshopView;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
diff --git a/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/BlacksmithWorkshopFileImplement.csproj b/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/BlacksmithWorkshopFileImplement.csproj
new file mode 100644
index 0000000..b65badc
--- /dev/null
+++ b/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/BlacksmithWorkshopFileImplement.csproj
@@ -0,0 +1,14 @@
+
+
+
+ net6.0
+ enable
+ enable
+
+
+
+
+
+
+
+
diff --git a/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/DataFileSingleton.cs b/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/DataFileSingleton.cs
new file mode 100644
index 0000000..a2b8f6c
--- /dev/null
+++ b/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/DataFileSingleton.cs
@@ -0,0 +1,47 @@
+using BlacksmithWorkshopFileImplement.Models;
+using System.Xml.Linq;
+namespace BlacksmithWorkshopFileImplement
+{
+ internal class DataFileSingleton
+ {
+ private static DataFileSingleton? instance;
+ private readonly string ComponentFileName = "Component.xml";
+ private readonly string OrderFileName = "Order.xml";
+ private readonly string ManufactureFileName = "Manufacture.xml";
+ public List Components { get; private set; }
+ public List Orders { get; private set; }
+ public List Manufactures { 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 SaveManufactures() => SaveData(Manufactures, ManufactureFileName, "Manufactures", x => x.GetXElement);
+ public void SaveOrders() => SaveData(Orders, OrderFileName, "Orders", x => x.GetXElement);
+ private DataFileSingleton()
+ {
+ Components = LoadData(ComponentFileName, "Component", x => Component.Create(x)!)!;
+ Manufactures = LoadData(ManufactureFileName, "Manufacture", x => Manufacture.Create(x)!)!;
+ Orders = LoadData(OrderFileName, "Order", x => Order.Create(x)!)!;
+ }
+ private static List? LoadData(string filename, string xmlNodeName, Func selectFunction)
+ {
+ if (File.Exists(filename))
+ {
+ return XDocument.Load(filename)?.Root?.Elements(xmlNodeName)?.Select(selectFunction)?.ToList();
+ }
+ return new List();
+ }
+ private static void SaveData(List data, string filename, string xmlNodeName, Func selectFunction)
+ {
+ if (data != null)
+ {
+ new XDocument(new XElement(xmlNodeName, data.Select(selectFunction).ToArray())).Save(filename);
+ }
+ }
+ }
+}
\ No newline at end of file
diff --git a/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/Implements/ComponentStorage.cs b/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/Implements/ComponentStorage.cs
new file mode 100644
index 0000000..863c2e3
--- /dev/null
+++ b/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/Implements/ComponentStorage.cs
@@ -0,0 +1,76 @@
+using BlacksmithWorkshopContracts.BindingModels;
+using BlacksmithWorkshopContracts.SearchModels;
+using BlacksmithWorkshopContracts.StoragesContracts;
+using BlacksmithWorkshopContracts.ViewModels;
+using BlacksmithWorkshopFileImplement.Models;
+
+namespace BlacksmithWorkshopFileImplement.Implements
+{
+ public class ComponentStorage : IComponentStorage
+ {
+ private readonly DataFileSingleton source;
+ public ComponentStorage()
+ {
+ source = DataFileSingleton.GetInstance();
+ }
+ public List GetFullList()
+ {
+ return source.Components
+ .Select(x => x.GetViewModel)
+ .ToList();
+ }
+ public List 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;
+ }
+ }
+}
\ No newline at end of file
diff --git a/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/Implements/ManufactureStorage.cs b/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/Implements/ManufactureStorage.cs
new file mode 100644
index 0000000..7805dd5
--- /dev/null
+++ b/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/Implements/ManufactureStorage.cs
@@ -0,0 +1,76 @@
+using BlacksmithWorkshopContracts.BindingModels;
+using BlacksmithWorkshopContracts.SearchModels;
+using BlacksmithWorkshopContracts.StoragesContracts;
+using BlacksmithWorkshopContracts.ViewModels;
+using BlacksmithWorkshopFileImplement.Models;
+
+namespace BlacksmithWorkshopFileImplement.Implements
+{
+ public class ManufactureStorage : IManufactureStorage
+ {
+ private readonly DataFileSingleton source;
+ public ManufactureStorage()
+ {
+ source = DataFileSingleton.GetInstance();
+ }
+ public List GetFullList()
+ {
+ return source.Manufactures
+ .Select(x => x.GetViewModel)
+ .ToList();
+ }
+ public List GetFilteredList(ManufactureSearchModel model)
+ {
+ if (string.IsNullOrEmpty(model.ManufactureName))
+ {
+ return new();
+ }
+ return source.Manufactures
+ .Where(x => x.ManufactureName.Contains(model.ManufactureName))
+ .Select(x => x.GetViewModel)
+ .ToList();
+ }
+ public ManufactureViewModel? GetElement(ManufactureSearchModel model)
+ {
+ if (string.IsNullOrEmpty(model.ManufactureName) && !model.Id.HasValue)
+ {
+ return null;
+ }
+ return source.Manufactures.FirstOrDefault(x => (!string.IsNullOrEmpty(model.ManufactureName) && x.ManufactureName == model.ManufactureName) || (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
+ }
+ public ManufactureViewModel? Insert(ManufactureBindingModel model)
+ {
+ model.Id = source.Manufactures.Count > 0 ? source.Manufactures.Max(x => x.Id) + 1 : 1;
+ var newManufacture = Manufacture.Create(model);
+ if (newManufacture == null)
+ {
+ return null;
+ }
+ source.Manufactures.Add(newManufacture);
+ source.SaveManufactures();
+ return newManufacture.GetViewModel;
+ }
+ public ManufactureViewModel? Update(ManufactureBindingModel model)
+ {
+ var manufacture = source.Manufactures.FirstOrDefault(x => x.Id == model.Id);
+ if (manufacture == null)
+ {
+ return null;
+ }
+ manufacture.Update(model);
+ source.SaveManufactures();
+ return manufacture.GetViewModel;
+ }
+ public ManufactureViewModel? Delete(ManufactureBindingModel model)
+ {
+ var element = source.Manufactures.FirstOrDefault(x => x.Id == model.Id);
+ if (element != null)
+ {
+ source.Manufactures.Remove(element);
+ source.SaveManufactures();
+ return element.GetViewModel;
+ }
+ return null;
+ }
+ }
+}
\ No newline at end of file
diff --git a/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/Implements/OrderStorage.cs b/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/Implements/OrderStorage.cs
new file mode 100644
index 0000000..b0d6550
--- /dev/null
+++ b/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/Implements/OrderStorage.cs
@@ -0,0 +1,87 @@
+using BlacksmithWorkshopContracts.BindingModels;
+using BlacksmithWorkshopContracts.SearchModels;
+using BlacksmithWorkshopContracts.StoragesContracts;
+using BlacksmithWorkshopContracts.ViewModels;
+using BlacksmithWorkshopFileImplement.Models;
+using System.Collections.Generic;
+
+namespace BlacksmithWorkshopFileImplement.Implements
+{
+ public class OrderStorage : IOrderStorage
+ {
+ private readonly DataFileSingleton source;
+ public OrderStorage()
+ {
+ source = DataFileSingleton.GetInstance();
+ }
+ private OrderViewModel AddManufactureName (OrderViewModel model)
+ {
+ model.ManufactureName = source.Manufactures.SingleOrDefault(x => x.Id == model.ManufactureId)?.ManufactureName ?? string.Empty;
+ return model;
+ }
+ public List GetFullList()
+ {
+ return source.Orders
+ .Select(x => AddManufactureName(x.GetViewModel))
+ .ToList();
+ }
+ public List GetFilteredList(OrderSearchModel model)
+ {
+ if (model.Id == null)
+ {
+ return new();
+ }
+ return source.Orders
+ .Where(x => x.Id == model.Id)
+ .Select(x => AddManufactureName(x.GetViewModel))
+ .ToList();
+ }
+ public OrderViewModel? GetElement(OrderSearchModel model)
+ {
+ if (!model.Id.HasValue)
+ {
+ return null;
+ }
+ var order = source.Orders.FirstOrDefault(x => (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
+ if (order == null)
+ {
+ return null;
+ }
+ return AddManufactureName(order);
+ }
+ 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 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 order.GetViewModel;
+ }
+ 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 element.GetViewModel;
+ }
+ return null;
+ }
+ }
+}
\ No newline at end of file
diff --git a/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/Models/Component.cs b/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/Models/Component.cs
new file mode 100644
index 0000000..a3aa6cc
--- /dev/null
+++ b/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/Models/Component.cs
@@ -0,0 +1,63 @@
+using BlacksmithWorkshopContracts.BindingModels;
+using BlacksmithWorkshopContracts.ViewModels;
+using BlacksmithWorkshopDataModels.Models;
+using System.Xml.Linq;
+
+
+namespace BlacksmithWorkshopFileImplement.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())
+ );
+ }
+}
\ No newline at end of file
diff --git a/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/Models/Manufacture.cs b/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/Models/Manufacture.cs
new file mode 100644
index 0000000..2ae1b94
--- /dev/null
+++ b/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/Models/Manufacture.cs
@@ -0,0 +1,94 @@
+using BlacksmithWorkshopContracts.BindingModels;
+using BlacksmithWorkshopContracts.ViewModels;
+using BlacksmithWorkshopDataModels.Models;
+using System.Xml.Linq;
+namespace BlacksmithWorkshopFileImplement.Models
+{
+ public class Manufacture : IManufactureModel
+ {
+ public int Id { get; private set; }
+ public string ManufactureName { get; private set; } = string.Empty;
+ public double Price { get; private set; }
+ public Dictionary Components { get; private set; } = new();
+ private Dictionary? _manufactureComponents = null;
+ public Dictionary ManufactureComponents
+ {
+ get
+ {
+ if (_manufactureComponents == null)
+ {
+ var source = DataFileSingleton.GetInstance();
+ _manufactureComponents = Components.ToDictionary(x => x.Key, y =>
+ ((source.Components.FirstOrDefault(z => z.Id == y.Key) as IComponentModel)!,
+ y.Value));
+ }
+ return _manufactureComponents;
+ }
+ }
+ public static Manufacture? Create(ManufactureBindingModel model)
+ {
+ if (model == null)
+ {
+ return null;
+ }
+ return new Manufacture()
+ {
+ Id = model.Id,
+ ManufactureName = model.ManufactureName,
+ Price = model.Price,
+ Components = model.ManufactureComponents.ToDictionary(x => x.Key, x => x.Value.Item2)
+ };
+ }
+ public static Manufacture? Create(XElement element)
+ {
+ if (element == null)
+ {
+ return null;
+ }
+ return new Manufacture()
+ {
+ Id = Convert.ToInt32(element.Attribute("Id")!.Value),
+ ManufactureName = element.Element("ManufactureName")!.Value,
+ Price = Convert.ToDouble(element.Element("Price")!.Value),
+ Components = element.Element("ManufactureComponents")!.Elements("ManufactureComponent") .ToDictionary
+ (
+ x => Convert.ToInt32(x.Element("Key")?.Value),
+ x => Convert.ToInt32(x.Element("Value")?.Value)
+ )
+ };
+ }
+ public void Update(ManufactureBindingModel model)
+ {
+ if (model == null)
+ {
+ return;
+ }
+ ManufactureName = model.ManufactureName;
+ Price = model.Price;
+ Components = model.ManufactureComponents.ToDictionary(x => x.Key, x => x.Value.Item2);
+ _manufactureComponents = null;
+ }
+ public ManufactureViewModel GetViewModel => new()
+ {
+ Id = Id,
+ ManufactureName = ManufactureName,
+ Price = Price,
+ ManufactureComponents = ManufactureComponents
+ };
+ public XElement GetXElement => new
+ (
+ "Manufacture",
+ new XAttribute("Id", Id),
+ new XElement("ManufactureName", ManufactureName),
+ new XElement("Price", Price.ToString()),
+ new XElement("ManufactureComponents", Components.Select
+ (x => new XElement
+ (
+ "ManufactureComponent",
+ new XElement("Key", x.Key),
+ new XElement("Value", x.Value)
+ )
+ ).ToArray())
+ );
+ }
+}
\ No newline at end of file
diff --git a/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/Models/Order.cs b/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/Models/Order.cs
new file mode 100644
index 0000000..8ce8605
--- /dev/null
+++ b/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/Models/Order.cs
@@ -0,0 +1,91 @@
+using BlacksmithWorkshopContracts.BindingModels;
+using BlacksmithWorkshopContracts.ViewModels;
+using BlacksmithWorkshopDataModels.Enums;
+using BlacksmithWorkshopDataModels.Models;
+using System.Xml.Linq;
+
+namespace BlacksmithWorkshopFileImplement.Models
+{
+ public class Order : IOrderModel
+ {
+ public int Id { get; private set; }
+ public int ManufactureId {get; private set; }
+ public int Count { get; private set; }
+ public double Sum { get; private set; }
+ public OrderStatus Status { get; private set; } = OrderStatus.Неизвестен;
+ public DateTime DateCreate { get; private set; } = DateTime.Now;
+ public DateTime? DateImplement { get; private set; }
+ public static Order? Create(OrderBindingModel? model)
+ {
+ if (model == null)
+ {
+ return null;
+ }
+ return new Order()
+ {
+ Id = model.Id,
+ ManufactureId = model.ManufactureId,
+ 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;
+ }
+ DateTime? dateImplement = null;
+ if (element.Element("DateImplement")!.Value != "")
+ {
+ dateImplement = Convert.ToDateTime(element.Element("DateImplement")!.Value);
+ }
+ return new Order()
+ {
+ Id = Convert.ToInt32(element.Attribute("Id")!.Value),
+ ManufactureId = Convert.ToInt32(element.Element("ManufactureId")!.Value),
+ Count = Convert.ToInt32(element.Element("Count")!.Value),
+ Sum = Convert.ToDouble(element.Element("Sum")!.Value),
+ Status = (OrderStatus)Convert.ToInt32(element.Element("Status")!.Value),
+ DateCreate = Convert.ToDateTime(element.Element("DateCreate")!.Value),
+ DateImplement = dateImplement
+ };
+ }
+ public void Update(OrderBindingModel? model)
+ {
+ if (model == null)
+ {
+ return;
+ }
+ Status = model.Status;
+ if (model.DateImplement != null)
+ {
+ DateImplement = model.DateImplement;
+ }
+ }
+ public OrderViewModel GetViewModel => new()
+ {
+ Id = Id,
+ ManufactureId = ManufactureId,
+ Count = Count,
+ Sum = Sum,
+ Status = Status,
+ DateCreate = DateCreate,
+ DateImplement = DateImplement
+ };
+ public XElement GetXElement => new
+ (
+ "Order",
+ new XAttribute("Id", Id),
+ new XElement("ManufactureId", ManufactureId),
+ new XElement("Count", Count),
+ new XElement("Sum", Sum),
+ new XElement("Status", (int)Status),
+ new XElement("DateCreate", DateCreate),
+ new XElement("DateImplement", DateImplement)
+ );
+ }
+}
\ No newline at end of file