LoginGreeting.cs

/*
 * Orchard exposes a lot of events that you can hook into to do anything. These events are commonly in the form that
 * you implement an interface and then Orchard will call into your implementation (so, not .NET-style events). We've
 * already seen an example of this with PersonPartHandler but here's a more event handler-like event handler, about
 * login events.
 */

using Microsoft.AspNetCore.Mvc.Localization;
using OrchardCore.DisplayManagement.Notify;
using OrchardCore.Users;
using OrchardCore.Users.Events;
using System;
using System.Threading.Tasks;

namespace Lombiq.TrainingDemo.Events;

// ILoginFormEvent exposes events of the, well, login form :). Useful to display a login greeting or anything even more
// useful! The rest of it is pretty standard and we just use INotifier again.
public class LoginGreeting : ILoginFormEvent
{
    private readonly INotifier _notifier;
    private readonly IHtmlLocalizer H;

    public LoginGreeting(INotifier notifier, IHtmlLocalizer<LoginGreeting> htmlLocalizer)
    {
        _notifier = notifier;
        H = htmlLocalizer;
    }

    public Task IsLockedOutAsync(IUser user) => Task.CompletedTask;

    public async Task LoggedInAsync(IUser user)
    {
        await _notifier.SuccessAsync(H["Hi {0}!", user.UserName]);

        return;
    }

    public Task LoggingInAsync(string userName, Action<string, string> reportError) => Task.CompletedTask;

    public Task LoggingInFailedAsync(string userName) => Task.CompletedTask;

    public Task LoggingInFailedAsync(IUser user) => Task.CompletedTask;
}

// END OF TRAINING SECTION: Event handlers

// NEXT STATION: Controllers/ApiController.cs