ISEbd-22_Baygulov_A.A._Sush.../SushiBar/SushiBarFileImplement/DataFileSingleton.cs

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using SushiBarFileImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Linq;
namespace SushiBarFileImplement
{
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internal class DataFileSingleton
{
private static DataFileSingleton? instance;
private readonly string ComponentFileName = "Component.xml";
private readonly string OrderFileName = "Order.xml";
private readonly string SushiFileName = "Sushi.xml";
private readonly string ClientFileName = "Client.xml";
private readonly string ImplementerFileName = "Implementer.xml";
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private readonly string MessageInfoFileName = "MessageInfo.xml";
public List<Component> Components { get; private set; }
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public List<Order> Orders { get; private set; }
public List<Sushi> Sushis { get; private set; }
public List<Client> Clients { get; private set; }
public List<Implementer> Implementers { get; private set; }
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public List<MessageInfo> Messages { get; private set; }
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public static DataFileSingleton GetInstance()
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{
if (instance == null)
{
instance = new DataFileSingleton();
}
return instance;
}
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public void SaveComponents() => SaveData(Components, ComponentFileName, "Components", x => x.GetXElement);
public void SaveSushis() => SaveData(Sushis, SushiFileName, "Sushis", x => x.GetXElement);
public void SaveOrders() => SaveData(Orders, OrderFileName, "Orders", x => x.GetXElement);
public void SaveClients() => SaveData(Clients, ClientFileName, "Clients", x => x.GetXElement);
public void SaveImplementers() => SaveData(Implementers, ImplementerFileName, "Implementers", x => x.GetXElement);
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public void SaveMessages() => SaveData(Orders, ImplementerFileName, "Messages", x => x.GetXElement);
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private DataFileSingleton()
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{
Components = LoadData(ComponentFileName, "Component", x => Component.Create(x)!)!;
Sushis = LoadData(SushiFileName, "Sushi", x => Sushi.Create(x)!)!;
Orders = LoadData(OrderFileName, "Order", x => Order.Create(x)!)!;
Clients = LoadData(ClientFileName, "Client", x => Client.Create(x)!)!;
Implementers = LoadData(ImplementerFileName, "Implementer", x => Implementer.Create(x)!)!;
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Messages = LoadData(MessageInfoFileName, "MessageInfo", x => MessageInfo.Create(x)!)!;
}
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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>();
}
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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);
}
}
}
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}