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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.BL;
using Tango.BL.Builders;
using Tango.BL.Entities;
using Tango.Core;
using Tango.Core.DI;
using Tango.PPC.Common.Authentication;
using Tango.PPC.Common.Navigation;
namespace Tango.PPC.UI.Authentication
{
/// <summary>
/// Represents the default PPC authentication provider.
/// </summary>
/// <seealso cref="Tango.Core.ExtendedObject" />
/// <seealso cref="Tango.PPC.Common.Authentication.IAuthenticationProvider" />
public class DefaultAuthenticationProvider : ExtendedObject, IAuthenticationProvider
{
/// <summary>
/// Gets or sets the navigation manager.
/// </summary>
[TangoInject(TangoInjectMode.WhenAvailable)]
public INavigationManager NavigationManager { get; set; }
/// <summary>
/// Occurs when the current logged-in user has changed.
/// </summary>
public event EventHandler<User> CurrentUserChanged;
private User _currentUser;
/// <summary>
/// Gets the current logged-in user.
/// </summary>
public User CurrentUser
{
get { return _currentUser; }
private set
{
_currentUser = value;
RaisePropertyChangedAuto();
}
}
/// <summary>
/// Gets a value indicating whether the authentication provider is using a null user.
/// </summary>
public bool AuthenticationRequired { get; private set; }
/// <summary>
/// Performs a user login by the specified email and password.
/// </summary>
/// <param name="email">The email.</param>
/// <param name="password">The password.</param>
/// <param name="encrypt">Determines whether to encrypt the provided password before attempting to login</param>
/// <returns></returns>
public Task<User> Login(string email, string password, bool encrypt = true)
{
return Task.Factory.StartNew<User>(() =>
{
AuthenticationRequired = true;
String hash = encrypt ? User.GetPasswordHash(password) : password;
LogManager.Log($"Logging in user {email}...");
using (var db = ObservablesContext.CreateDefault())
{
CurrentUser = new UserBuilder(db).Set(x => x.Email.ToLower() == email && x.Password == hash)
.WithOrganization()
.WithRolesAndPermissions()
.Build();
}
if (CurrentUser != null)
{
LogManager.Log($"Current user is now: {CurrentUser.Contact.FullName}.");
}
else
{
LogManager.Log("Login failed!");
}
CurrentUserChanged?.Invoke(this, CurrentUser);
return CurrentUser;
});
}
public Task Login()
{
return Task.Factory.StartNew(() =>
{
AuthenticationRequired = false;
CurrentUser = null;
CurrentUserChanged?.Invoke(this, CurrentUser);
});
}
/// <summary>
/// Logs-out the current logged-in user.
/// </summary>
public void LogOut()
{
LogManager.Log("Logging out current user.");
CurrentUser = null;
CurrentUserChanged?.Invoke(this, CurrentUser);
NavigationManager.NavigateTo(NavigationView.LoginView);
}
}
}
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