Command bus middleware

[remipelhate]

Hi team! I'm not sure how many people are using Laravel command bus these days, but I've loved it ever since it was added in Laravel 5.x.

I was thinking it could be nice to add support for command bus middleware in a similar fashion to Queued jobs middleware:

final readonly class PurchasePodcast
{
    public function middleware(): array
    {
        return [
            RollbackOnFailure::class, // ... using the class FQN to resolve from the container
            new SomeCustomMiddleware(), // ... or simply initialising it on the fly
        ];
    }
}

I know this can already be achieved using Illuminate\Contracts\Bus\Dispatcher::pipeThrough(), but defining the middleware on the command itself has the advantage of not having to redefine the same logic when the command is dispatched through different entry points. And it would be consistent with the queued jobs implementation :)

If there is any interest, I have implemented this in a project recently using a globally registered command bus pipe. I can easily extract it and setup a PR.

Thanks for your feedback 🙏🏻