CreateContentEventHandler.php

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<?php

namespace Elgg\Notifications;

class CreateContentEventHandler {
    
    public function __invoke(\Elgg\Event $event): void {
        $entity = $event->getObject();
        if (!$entity instanceof \ElggObject && !$entity instanceof \ElggGroup) {
            return;
        }
        
        $owner = $entity->getOwnerEntity();
        if (!$owner instanceof \ElggUser) {
            return;
        }
        
        if ($entity instanceof \ElggObject) {
            $notification_events = _elgg_services()->notifications->getEvents();
            if (!isset($notification_events[$entity->getType()]) || !isset($notification_events[$entity->getType()][$entity->getSubtype()])) {
                // no notification events registered for this entity type/subtype
                // so there is no need to subscribe
                // this also prevents the database from flooding with relationships that are never used (e.g. subscriptions to site notifications)
                return;
            }
        }
        
        $content_preferences = $owner->getNotificationSettings('content_create');
        $enabled_methods = array_keys(array_filter($content_preferences));
        
        // loop through all notification types
        $methods = elgg_get_notification_methods();
        foreach ($enabled_methods as $method) {
            // only enable supported methods
            if (!in_array($method, $methods)) {
                continue;
            }
            
            $entity->addSubscription($owner->guid, $method);
        }
    }
}