OOOWriteAndClear/OOO_WriteAndClear/MVP/Views/AuthorizationUserControl.xaml.cs

using CapchaLibrary;
using OOO_WriteAndClear.DBModels;
using OOO_WriteAndClear.EventBus.Signals;
using OOO_WriteAndClear.MVP.MVPInterfaces;
using OOO_WriteAndClear.MVP.Presenters;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Threading;

namespace OOO_WriteAndClear.MVP.Views
{
    /// <summary>
    /// Логика взаимодействия для AuthorizationUserControl.xaml
    /// </summary>
    public partial class AuthorizationUserControl : UserControl, IAuthorizationContract.IView
    {
        public AuthorizationUserControl()
        {
            InitializeComponent();

            _presenter = new AuthorizationUserControlPresenter(this);
            _dispatcherTimer = new DispatcherTimer();
            _dispatcherTimer.Tick += EnableButton;
            _dispatcherTimer.Interval = new TimeSpan(0, 0, 10);
        }


        #region Реализация IAuthorizationContract.IView

        /// <summary>
        /// Вывести сообщение о провале авторизации
        /// </summary>
        public void ShowFailureAuthorizeMessage()
        {
            MessageBox.Show("Провал авторизации!",
                "Пользователя не существует, проверьте правильность написания логина и пароля",
                MessageBoxButton.OK,
                MessageBoxImage.Error);
            Dispatcher.BeginInvoke(new Action(() =>
            {
                if (_capchaCode is not null)
                    DisableButtonAndStartTimer();
                UpdateCapcha();
                CapchaStackPanel.Visibility = Visibility.Visible;
            })).Wait();
        }

        /// <summary>
        /// Выполняет действия необходимые для входа пользователя в систему
        /// </summary>
        /// <param name="user">Авторизованный пользователь</param>
        public void LetInAuthorizedUser(User user)
        {
            Dispatcher.BeginInvoke(new Action(() => 
            {
                EventBus.EventBus.GetService().Invoke(new UserWasLoggedSignal(user));
            }));
        }

        #endregion


        public string Login { get => LoginField.Text; set => LoginField.Text = value; }
        public string Password { get => PasswordField.Password; set => PasswordField.Password = value; }


        private readonly IAuthorizationContract.IPresenter _presenter;

        private string? _capchaCode = null;

        private readonly DispatcherTimer _dispatcherTimer;


        #region Обработчики событий разметки

        /// <summary>
        /// Обработчик события нажатия на кнопку авторизации
        /// </summary>
        /// <param name="sender">Кнопка</param>
        /// <param name="e">Аргументы события</param>
        private void LoginButton_Click(object sender, RoutedEventArgs e)
        {
            if (_capchaCode is not null && _capchaCode != CapchaCodeTextBox.Text)
            {
                MessageBox.Show("Капча введена не верно!", "Капча", MessageBoxButton.OK);
                UpdateCapcha();
                DisableButtonAndStartTimer();
                return;
            }
            string login = Login;
            string password = Password;
            Task.Run(() =>
            {
                _presenter.CheckTheUser(login, password);
            });
        }

        /// <summary>
        /// Обработчик события нажатия на ссылку входа как гость
        /// </summary>
        /// <param name="sender">Ссылка</param>
        /// <param name="e">Аргументы события</param>
        private void LoginAsGuestLink_Click(object sender, RoutedEventArgs e)
        {
            EventBus.EventBus.GetService().Invoke(new UserWasLoggedSignal(new User() { UserId = -1 })); //ID = -1, так как пользователь не авторизован
        }

        private void RefreshCapcha_Click(object sender, RoutedEventArgs e)
        {
            UpdateCapcha();
        }

        #endregion


        private void UpdateCapcha()
        {
            CapchaData capchaData = new CapchaGenerator().GenerateCapcha();
            _capchaCode = capchaData.Code;
            BitmapImage bitmapimage = new BitmapImage();
            using (MemoryStream memory = new MemoryStream())
            {
                capchaData.CapchaImage.Save(memory, System.Drawing.Imaging.ImageFormat.Bmp);
                memory.Position = 0;
                bitmapimage.BeginInit();
                bitmapimage.StreamSource = memory;
                bitmapimage.CacheOption = BitmapCacheOption.OnLoad;
                bitmapimage.EndInit();
            }
            CapchaImage.Source = bitmapimage;
        }

        private void DisableButtonAndStartTimer()
        {
            AuthButton.IsEnabled = false;
            _dispatcherTimer.Start();
        }

        private void EnableButton(object sender, EventArgs e)
        {
            AuthButton.IsEnabled = true;
        }
    }
}