Include unsubscribe link in Slack footer

app/Notifications/Component/ComponentStatusChangedNotification.php

@@ -143,14 +143,15 @@ class ComponentStatusChangedNotification extends Notification
         return (new SlackMessage())
                     ->$status()
                     ->content(trans('notifications.component.status_update.title'))
-                    ->attachment(function ($attachment) use ($content) {
+                    ->attachment(function ($attachment) use ($content, $notifiable) {
                         $attachment->title($content, cachet_route('status-page'))
                                    ->fields(array_filter([
                                         'Component'  => $this->component->name,
                                         'Old Status' => $this->component->human_status,
                                         'New Status' => trans("cachet.components.status.{$this->status}"),
                                         'Link'       => $this->component->link,
-                                    ]));
+                                    ]))
+                                   ->footer(trans('cachet.subscriber.unsubscribe', ['link' => cachet_route('subscribe.unsubscribe', $notifiable->verify_code)]));
                     });
     }
 }

resources/lang/en/cachet.php

@@ -76,9 +76,10 @@ return [
 
     // Subscriber
     'subscriber' => [
-        'subscribe' => 'Subscribe to get the updates',
-        'button'    => 'Subscribe',
-        'manage'    => [
+        'subscribe'   => 'Subscribe to get the updates',
+        'unsubscribe' => 'Unsubscribe at :link',
+        'button'      => 'Subscribe',
+        'manage'      => [
             'no_subscriptions' => 'You\'re currently subscribed to all updates.',
             'my_subscriptions' => 'You\'re currently subscribed to the following updates.',
         ],