Listen for events

Registering the listener

The register your action as an event listener, simply register it in your EventServiceProvider just like any other listener.

namespace App\Providers;

class EventServiceProvider extends ServiceProvider
{
    protected $listen = [
        MyEvent::class => [
            MyAction::class,
        ],
    ];

    // ...
}

You may also use the listen method on the Event Facade to register it somewhere else.

Event::listen(MyEvent::class, MyAction::class);

// Note that it also works with string events.
Event::listen('my_string_events.*', MyAction::class);

From listener to action

As usual, you may use the asListener method to translate the event data into a call to your handle method.

class SendOfferToNearbyDrivers
{
    use AsAction;

    public function handle(Address $source, Address $destination): void
    {
        // ...
    }

    public function asListener(TaxiRequested $event): void
    {
        $this->handle($event->source, $event->destination);
    }
}

If you're listening to string events, then the asListener method will receive all the event parameters as arguments.

// When we dispatch that string event with some parameters.
Event::dispatch('taxi.requested', [$source, $destination]);

// Then the `asListener` method receives them as arguments.
public function asListener(Source $source, Destination $destination): void
{
    $this->handle($source, $destination);
}

Note that, in this particular case, the asListener could be obsolete since it has the same signature as the handle method and simply delegates to it.

You may also register your action as a listener of many different events and use the asListener as a way to parse the various events into your handle method.

public function asListener(...$parameters): void
{
    $event = $parameters[0];

    if ($event instanceof TaxiRequested) {
        return $this->handle($event->source, $event->destination);
    }

    if ($event instanceof FoodDeliveryRequested) {
        return $this->handle($event->restaurant->address, $event->destination);
    }
    
    $this->handle(...$parameters);
}

And that's all there is to it! Next, let's move on to executing your actions as artisan commands.