GeneratorLogin/ViewModels/DataOutputViewModel.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using LoginGenerator.Models;
using ReactiveUI;

namespace LoginGenerator.ViewModels
{
    public class DataOutputViewModel : ReactiveObject
	{
        public string[] AllData;
        private List<Users>? users;
        public List<Users>? Userss { get => users; set => this.RaiseAndSetIfChanged(ref users, value); }
        public string[] OneUser;
        public Users u;


        public DataOutputViewModel()
        {
            Userss = new List<Users>();
            FillingUsersList();
            Sort = new List<string>() { "Äàòà ïî óáûâàíèþ", "Äàòà ïî âîçðàñòàíèþ" };
            SelectedSort = Sort[0];
        }

        public void FillingUsersList()
        {
            if (!File.Exists(FilePath.PATH))
            {
                var file = File.Create(FilePath.PATH);
                file.Close();
            }
            AllData = File.ReadAllLines(FilePath.PATH);
            List<Users>? newUsers = new List<Users>();
            foreach (string user in AllData)
            {
                if (!string.IsNullOrEmpty(user))
                {
                    u = new Users();
                    OneUser = user.Split(' ');
                    u.Surname = OneUser[0].ToString();
                    u.Name = OneUser[1].ToString();
                    u.Patronymic = OneUser[2].ToString();
                    u.Login = OneUser[3].ToString();
                    u.Password = OneUser[4].ToString();
                    u.DateReg = Convert.ToDateTime(OneUser[5]);
                    newUsers.Add(u);
                }
            }
            Userss = newUsers;
        }

        private string? _findPass;
        public string? FindPass
        {
            get => _findPass;
            set
            {
                _findPass = value;
                Filter();
            }
        }

        private string? _findLogin;
        public string? FindLogin
        {
            get => _findLogin;
            set
            {
                _findLogin = value;
                Filter();
            }
        }

        private string? _findFio;
        public string? FindFio
        {
            get => _findFio;
            set
            {
                _findFio = value;
                Filter();
            }
        }

        private static List<string>? _sort;
        public static List<string>? Sort { get => _sort; set => _sort = value; }

        private string? _selectedSort;
        public string? SelectedSort
        {
            get
            {
                return _selectedSort;
            }
            set
            {
                _selectedSort = value;
                Filter();
            }
        }

        public void Filter()
        {
            FillingUsersList();

            switch (SelectedSort)
            {
                case "Äàòà ïî óáûâàíèþ":
                    Userss = Userss.OrderByDescending(x => x.DateReg).ToList();
                    break;
                case "Äàòà ïî âîçðàñòàíèþ":
                    Userss = Userss.OrderBy(x => x.DateReg).ToList();
                    break;
            }

            if (FindFio != null && FindFio != "")
            {
                Userss = Userss.Where(x => x.Name.ToUpper().Contains(FindFio.ToString().ToUpper()) || x.Surname.ToUpper().Contains(FindFio.ToString().ToUpper()) ||
                x.Patronymic.ToUpper().Contains(FindFio.ToString().ToUpper())).ToList();
            }

            if (FindLogin != null && FindLogin != "")
            {
                Userss = Userss.Where(x => x.Login.Contains(FindLogin.ToString())).ToList();
            }

            if (FindPass != null && FindPass != "")
            {
                Userss = Userss.Where(x => x.Password.Contains(FindPass.ToString())).ToList();
            }
        }
    }
}