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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.Core.Commands;
using Tango.Core.Cryptography;
using Tango.MachineStudio.Common.Authentication;
using Tango.MachineStudio.Common.Navigation;
using Tango.MachineStudio.Common.Notifications;
using Tango.Settings;
using Tango.SharedUI;
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 Rfc2898Cryptographer cryptographer;
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 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<String> 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)
{
_notificationProvider = notificationProvider;
_navigationManager = navigationManager;
_authenticationProvider = authenticationProvider;
LoginCommand = new RelayCommand<String>(Login);
cryptographer = new Rfc2898Cryptographer();
Email = SettingsManager.Default.MachineStudio.LastLoginEmail;
RememberMe = SettingsManager.Default.MachineStudio.RememberMe;
}
/// <summary>
/// Logins the requested user.
/// </summary>
/// <param name="password">The password.</param>
private void Login(String password)
{
if (Validate())
{
try
{
_authenticationProvider.Login(Email, password);
_navigationManager.NavigateTo(NavigationView.MainView);
SettingsManager.Default.MachineStudio.LastLoginEmail = Email;
SettingsManager.Default.MachineStudio.RememberMe = RememberMe;
SettingsManager.Default.MachineStudio.LastLoginPassword = RememberMe ? cryptographer.Encrypt(password) : null;
SettingsManager.SaveDefaultSettings();
}
catch
{
_notificationProvider.ShowError("Invalid credentials. Please try again.");
}
}
}
}
}
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