55 lines
2.1 KiB
C#
55 lines
2.1 KiB
C#
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using LawFirmFileImplement.Models;
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using System.Xml.Linq;
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namespace LawFirmFileImplement
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{
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public class DataFileSingleton
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{
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private static DataFileSingleton? instance;
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private readonly string BlankFileName = "Blank.xml";
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private readonly string OrderFileName = "Order.xml";
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private readonly string DocumentFileName = "Document.xml";
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public List<Blank> Blanks { get; private set; }
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public List<Order> Orders { get; private set; }
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public List<Document> Documents { get; private set; }
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public static DataFileSingleton GetInstance()
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{
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if (instance == null)
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{
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instance = new DataFileSingleton();
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}
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return instance;
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}
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public void SaveBlanks() => SaveData(Blanks, BlankFileName, "Blanks", x => x.GetXElement);
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public void SaveDocuments() => SaveData(Documents, DocumentFileName, "Documents", x => x.GetXElement);
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public void SaveOrders() => SaveData(Orders, OrderFileName, "Orders", x => x.GetXElement);
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private DataFileSingleton()
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{
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Blanks = LoadData(BlankFileName, "Blank", x => Blank.Create(x)!)!;
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Documents = LoadData(DocumentFileName, "Document", x => Document.Create(x)!)!;
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Orders = LoadData(OrderFileName, "Order", x => Order.Create(x)!)!;
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}
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private static List<T>? LoadData<T>(string filename, string xmlNodeName,
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Func<XElement, T> selectFunction)
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{
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if (File.Exists(filename))
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{
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return XDocument.Load(filename)?.
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Root?.
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Elements(xmlNodeName)?.
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Select(selectFunction)?.
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ToList();
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}
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return new List<T>();
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}
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private static void SaveData<T>(List<T> data, string filename,
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string xmlNodeName, Func<T, XElement> selectFunction)
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{
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if (data != null)
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{
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new XDocument(new XElement(xmlNodeName,
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data.Select(selectFunction).ToArray())).Save(filename);
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}
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}
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}
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}
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