mailer = $mailer; } public function subscribe($events) { $events->listen('invoice.sent', 'InvoiceEventHandler@onSent'); $events->listen('invoice.viewed', 'InvoiceEventHandler@onViewed'); $events->listen('invoice.paid', 'InvoiceEventHandler@onPaid'); } public function onSent($invoice) { $this->sendNotifications($invoice, 'sent'); } public function onViewed($invoice) { } public function onPaid($invoice) { } private function sendNotifications($invoice, $type) { foreach ($invoice->account->users as $user) { if ($user->{'notify_' . $type}) { $this->mailer->sendNotification($user, $invoice, $type); } } } }