[5.4] Conditional broadcasting

[iwex]

Sometimes we should broadcast event only if some condition is true.

Example:

class Win implements ShouldBroadcast
{
    protected $score;
    protected $reportScore;
    
    public function __construct($score)
    {
        $this->score = $score;
    }
    
    public function broadcastCondition() {
        return $this->score > $this->reportScore;
    }

    public function broadcastOn()
    {
        return ['general-channel'];
    }
}

[iwex]

I'll add test if this changes is ok

[taylorotwell]

I would call the method broadcastWhen

[iwex]

@taylorotwell done, please check