79 lines
3.4 KiB
C#
79 lines
3.4 KiB
C#
using DinerFileImplement.Models;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Xml.Linq;
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namespace DinerFileImplement
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{
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internal class DataFileSingleton
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{
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private static DataFileSingleton? instance;
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private readonly string FoodFileName = "Food.xml";
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private readonly string OrderFileName = "Order.xml";
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private readonly string SnackFileName = "Snack.xml";
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private readonly string ClientFileName = "Client.xml";
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private readonly string ImplementerFileName = "Implementer.xml";
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private readonly string MessageInfoFileName = "MessageInfo.xml";
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public List<Food> Foods { get; set; }
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public List<Order> Orders { get; private set; }
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public List<Snack> Snacks { get; private set; }
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public List<Client> Clients { get; private set; }
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public List<Implementer> Implementers { get; private set; }
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public List<MessageInfo> MessageInfos { get; private set; }
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private DataFileSingleton() {
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Foods = LoadData(FoodFileName, "Food", x => Food.Create(x)!)!;
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Snacks = LoadData(SnackFileName, "Snack", x => Snack.Create(x)!)!;
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Orders = LoadData(OrderFileName, "Order", x => Order.Create(x)!)!;
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Clients = LoadData(ClientFileName, "Client", x => Client.Create(x)!)!;
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Implementers = LoadData(ImplementerFileName, "Implementer", x => Implementer.Create(x)!)!;
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MessageInfos = LoadData(MessageInfoFileName, "MessageInfo", x => MessageInfo.Create(x)!)!;
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}
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public static DataFileSingleton GetInstance() {
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if (instance == null) instance = new DataFileSingleton();
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return instance;
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}
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public void SaveFoods() => SaveData(Foods, FoodFileName, "Foods",
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x => x.GetXElement);
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public void SaveSnacks() => SaveData(Snacks, SnackFileName, "Snacks",
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x => x.GetXElement);
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public void SaveOrder() => SaveData(Orders, OrderFileName, "Orders",
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x => x.GetXElement);
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public void SaveClient() => SaveData(Clients, ClientFileName, "Clients",
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x => x.GetXElement);
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public void SaveImplementer() => SaveData(Implementers, ImplementerFileName, "Implementers",
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x => x.GetXElement);
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public void SaveMessageInfo() => SaveData(MessageInfos, MessageInfoFileName, "MessageInfo",
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x => x.GetXElement);
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private static void SaveData<T>(List<T> data, string filename, string xmlNodeName,
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Func<T, XElement> selectFunction)
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{
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if (data != null) {
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new XDocument(new XElement(xmlNodeName, data.Select(selectFunction).ToArray()))
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.Save(filename);
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}
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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)?.Root?.Elements(xmlNodeName)?
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.Select(selectFunction)?.ToList();
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}
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return new List<T>();
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}
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}
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}
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