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using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.BL;
using Tango.BL.Enumerations;
using Tango.Core.Commands;
using Tango.Core.Cryptography;
using Tango.MachineStudio.Common;
using Tango.MachineStudio.Common.Authentication;
using Tango.MachineStudio.Common.EventLogging;
using Tango.MachineStudio.Common.Navigation;
using Tango.MachineStudio.Common.Notifications;
using Tango.Settings;
using Tango.SharedUI;
using Tango.Web;
namespace Tango.MachineStudio.UI.ViewModels
{
/// <summary>
/// Represents the Machine Studio login view, view model.
/// </summary>
/// <seealso cref="Tango.SharedUI.ViewModel" />
public class LoginViewVM : ViewModel
{
private IAuthenticationProvider _authenticationProvider;
private INavigationManager _navigationManager;
private INotificationProvider _notificationProvider;
private IEventLogger _eventLogger;
private Rfc2898Cryptographer cryptographer;
private MachineStudioSettings _settings;
private String _email;
/// <summary>
/// Gets or sets the email.
/// </summary>
[Required(ErrorMessage = "Email is required")]
[EmailAddress(ErrorMessage = "Please enter a valid email")]
public String Email
{
get { return _email; }
set { _email = value; RaisePropertyChangedAuto(); }
}
private String _password;
/// <summary>
/// Gets or sets the password.
/// </summary>
[Required(ErrorMessage = "Password is required")]
public String Password
{
get { return _password; }
set { _password = value; RaisePropertyChangedAuto(); }
}
private DeploymentSlot _deploymentSlot;
/// <summary>
/// Gets or sets the deployment slot.
/// </summary>
public DeploymentSlot DeploymentSlot
{
get { return _deploymentSlot; }
set { _deploymentSlot = value; RaisePropertyChangedAuto(); }
}
private bool _isLogging;
/// <summary>
/// Gets or sets a value indicating whether this instance is logging.
/// </summary>
public bool IsLogging
{
get { return _isLogging; }
set { _isLogging = value; RaisePropertyChangedAuto(); }
}
private bool _rememberMe;
/// <summary>
/// Gets or sets a value indicating whether to remember the last user email and password.
/// </summary>
public bool RememberMe
{
get { return _rememberMe; }
set { _rememberMe = value; RaisePropertyChangedAuto(); }
}
/// <summary>
/// Gets or sets the login command.
/// </summary>
public RelayCommand LoginCommand { get; set; }
/// <summary>
/// Initializes a new instance of the <see cref="LoginViewVM"/> class.
/// </summary>
/// <param name="authenticationProvider">The authentication provider.</param>
/// <param name="navigationManager">The navigation manager.</param>
/// <param name="notificationProvider">The notification provider.</param>
public LoginViewVM(IAuthenticationProvider authenticationProvider, INavigationManager navigationManager, INotificationProvider notificationProvider, IEventLogger eventLogger)
{
_settings = SettingsManager.Default.GetOrCreate<MachineStudioSettings>();
_notificationProvider = notificationProvider;
_navigationManager = navigationManager;
_authenticationProvider = authenticationProvider;
_eventLogger = eventLogger;
LoginCommand = new RelayCommand(Login, () => !IsLogging);
cryptographer = new Rfc2898Cryptographer();
Email = _settings.LastLoginEmail;
DeploymentSlot = _settings.DeploymentSlot;
RememberMe = _settings.RememberMe;
try
{
Password = cryptographer.Decrypt(_settings.LastLoginPassword);
}
catch (Exception ex)
{
LogManager.Log(ex);
}
}
/// <summary>
/// Logins the requested user.
/// </summary>
private async void Login()
{
if (Validate())
{
try
{
IsLogging = true;
InvalidateRelayCommands();
await Task.Factory.StartNew(() =>
{
_settings.DeploymentSlot = DeploymentSlot;
_authenticationProvider.Login(Email, Password);
_eventLogger.Log(EventTypes.ApplicationStarted, "Application Started!");
_navigationManager.NavigateTo(NavigationView.MainView);
_settings.LastLoginEmail = Email;
_settings.RememberMe = RememberMe;
_settings.LastLoginPassword = RememberMe ? cryptographer.Encrypt(Password) : null;
_settings.Save();
_eventLogger.Log("User logged in.");
});
}
catch (Exception ex)
{
LogManager.Log(ex, "Login Error.");
_notificationProvider.ShowError($"The specified email or password was incorrect, or you don't have a permission to run this application.\nError: {ex.FlattenMessage()}");
}
finally
{
IsLogging = false;
InvalidateRelayCommands();
}
}
}
}
}
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