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using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Authentication;
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.Core.ExtensionMethods;
using Tango.FSE.BL;
using Tango.FSE.BL.Web;
using Tango.FSE.Common;
using Tango.FSE.Common.Authentication;
using Tango.FSE.Common.FSEApplication;
using Tango.FSE.Common.Navigation;
using Tango.FSE.Common.Notifications;
using Tango.FSE.UI.ViewModels;
using Tango.FSE.Web.Messages;
using Tango.MachineService.Gateway;
using Tango.Settings;
namespace Tango.FSE.UI.Authentication
{
/// <summary>
/// Represents the default FSE authentication provider.
/// </summary>
/// <seealso cref="Tango.Core.ExtendedObject" />
/// <seealso cref="Tango.FSE.Common.Authentication.IAuthenticationProvider" />
public class DefaultAuthenticationProvider : ExtendedObject, IAuthenticationProvider
{
private const string WEB_DEBUG_ADDRESS = "http://localhost:1111";
[TangoInject(TangoInjectMode.WhenAvailable)]
private IFSEApplicationManager ApplicationManager { get; set; }
[TangoInject(TangoInjectMode.WhenAvailable)]
private INavigationManager NavigationManager { get; set; }
[TangoInject(TangoInjectMode.WhenAvailable)]
private INotificationProvider NotificationProvider { get; set; }
[TangoInject(TangoInjectMode.WhenAvailable)]
private FSEServicesContainer Services { get; set; }
[TangoInject(TangoInjectMode.WhenAvailable)]
private FSEWebClient WebClient { 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>
/// Logins the specified email.
/// </summary>
/// <param name="email">The email.</param>
/// <param name="password">The password.</param>
/// <param name="environment">The environment.</param>
/// <returns></returns>
public Task<AuthenticationResult> Login(String email, String password, EnvironmentConfiguration environment, Action<String> onStatusChanged = null)
{
return Task.Factory.StartNew<AuthenticationResult>(() =>
{
LogManager.Log($"Authenticating user '{email}'...");
onStatusChanged?.Invoke($"Authenticating user {email}...");
var settings = SettingsManager.Default.GetOrCreate<FSESettings>();
settings.MachineServiceAddress = environment.MachineServiceAddress;
if (ApplicationManager.IsWebDebugMode)
{
LogManager.Log($"Application is currently in web debug mode. Authenticating through '{WEB_DEBUG_ADDRESS}'.");
WebClient.Address = WEB_DEBUG_ADDRESS;
}
else
{
LogManager.Log($"Authenticating through machine service at '{environment.MachineServiceAddress}'...");
WebClient.Address = environment.MachineServiceAddress;
}
var appVersion = ApplicationManager.Version.ToString();
if (settings.ForceVersionUpdate)
{
LogManager.Log("Application settings are set to force version update. Settings reported application version to '1.0.0.0'.");
appVersion = "1.0.0.0";
}
LoginResponse response = null;
try
{
onStatusChanged?.Invoke($"Contacting machine service at '{WebClient.Address}'...");
response = Services.AuthenticationService.Authenticate(new LoginRequest()
{
Email = email,
Password = password,
Version = appVersion,
}).Result;
LogManager.Log($"Authentication response received:\n{response.ToJsonString()}");
settings.Save();
}
catch (Exception ex)
{
LogManager.Log(ex, "Error authenticating user.");
throw new AggregateException(new AuthenticationException("Error logging in to machine service."), ex);
}
if (settings.Environment == FSESettings.WorkingEnvironment.Remote)
{
ObservablesContext.OverrideSettingsDataSource(response.DataSource);
}
if (response.PasswordChangeRequired)
{
LogManager.Log("User password change required.");
Services.AuthenticationService.DropCachedResponse(email);
return new AuthenticationResult() { Response = response };
}
LogManager.Log("Retrieving full user details...");
User user = Services.UsersService.GetUserFull(email.ToLower()).Result;
if (user != null)
{
LogManager.Log($"Current user is now: {user.Contact.FullName}.");
}
else
{
throw LogManager.Log(new AuthenticationException("Login failed for some strange reason."));
}
if (!user.HasPermission(Tango.BL.Enumerations.Permissions.FSE_RunFSE))
{
throw LogManager.Log(new AuthenticationException("You do not have the permissions to access Tango FSE."));
}
//onStatusChanged?.Invoke("Loading static collections...");
//ObservablesStaticCollections.Instance.Initialize((msg) =>
//{
// onStatusChanged?.Invoke(msg);
//});
CurrentUser = user;
settings.Save();
CurrentUserChanged?.Invoke(this, CurrentUser);
return new AuthenticationResult()
{
Response = response,
User = CurrentUser,
};
});
}
/// <summary>
/// Logs-out the current logged-in user.
/// </summary>
public async void LogOut()
{
LogManager.Log("Logging out current user...");
using (NotificationProvider.PushTaskItem("Logging out..."))
{
await Task.Delay(1000);
LogManager.Log($"Invoking {nameof(FSEViewModel.OnApplicationLogout)} on all FSE view models...");
foreach (var vm in TangoIOC.Default.GetAllInstancesByBase<FSEViewModel>())
{
try
{
if (!await vm.OnApplicationLogout())
{
return;
}
}
catch (Exception ex)
{
LogManager.Log(ex, $"An error occurred on ApplicationLogOut on {vm.GetType().FullName}.");
}
}
await Task.Delay(1000);
}
LogManager.Log("Logging out current user.");
CurrentUser = null;
CurrentUserChanged?.Invoke(this, CurrentUser);
LogManager.Log($"Navigating to {nameof(NavigationView.LoginView)}...");
await NavigationManager.NavigateWithObject<LoginViewVM.NavigationObject>(NavigationView.LoginView, new LoginViewVM.NavigationObject()
{
IsLoggingOut = true,
}, false);
}
}
}
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