From a60b8e7edc03a77c4b64286ae6ed07f423acbf84 Mon Sep 17 00:00:00 2001
From: Programmist73 <egor.eliseev.1986@mail.ru>
Date: Tue, 14 Feb 2023 00:22:30 +0400
Subject: [PATCH] =?UTF-8?q?=D0=A1=D0=BE=D0=B7=D0=B4=D0=B0=D0=BD=D0=B8?=
 =?UTF-8?q?=D0=B5=20DataFile=20=D0=B4=D0=BB=D1=8F=20FileImplement.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../DataFileSingleton.cs                      | 68 +++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 BlacksmithWorkshop/BlacksmithWorkshopFileImplement/DataFileSingleton.cs

diff --git a/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/DataFileSingleton.cs b/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/DataFileSingleton.cs
new file mode 100644
index 0000000..b6628a3
--- /dev/null
+++ b/BlacksmithWorkshop/BlacksmithWorkshopFileImplement/DataFileSingleton.cs
@@ -0,0 +1,68 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml.Linq;
+using BlacksmithWorkshopFileImplement.Models;
+
+namespace BlacksmithWorkshopFileImplement
+{
+    public class DataFileSingleton
+    {
+        private static DataFileSingleton? instance;
+
+        private readonly string WorkPieceFileName = "WorkPiece.xml";
+
+        private readonly string OrderFileName = "Order.xml";
+
+        private readonly string ManufactureFileName = "Manufacture.xml";
+
+        public List<WorkPiece> WorkPieces { get; private set; }
+
+        public List<Order> Orders { get; private set; }
+
+        public List<Manufacture> Manufactures { get; private set; }
+
+        public static DataFileSingleton GetInstance()
+        {
+            if (instance == null)
+            {
+                instance = new DataFileSingleton();
+            }
+
+            return instance;
+        }
+
+        public void SaveWorkPieces() => SaveData(WorkPieces, WorkPieceFileName, "WorkPieces", 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()
+        {
+            WorkPieces = LoadData(WorkPieceFileName, "WorkPiece", x => WorkPiece.Create(x)!)!;
+            Manufactures = LoadData(ManufactureFileName, "Manufacture", x => Manufacture.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);
+            }
+        }
+    }
+}