TouchIconsOnAccessChangeHandler.php

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<?php

namespace Elgg\Icons;

class TouchIconsOnAccessChangeHandler {
    
    public function __invoke(\Elgg\Event $event) {
        $entity = $event->getObject();
        if (!$entity instanceof \ElggEntity) {
            return;
        }
        
        $original_attributes = $entity->getOriginalAttributes();
        if (!array_key_exists('access_id', $original_attributes)) {
            return;
        }
        
        if ($entity instanceof \ElggFile) {
            // we touch the file to invalidate any previously generated download URLs
            $entity->setModifiedTime();
        }
        
        $sizes = array_keys(elgg_get_icon_sizes($entity->getType(), $entity->getSubtype()));
        foreach ($sizes as $size) {
            // using the Icon Service because we don't want to auto generate the 'new' icon
            $icon = _elgg_services()->iconService->getIcon($entity, $size, 'icon', false);
            if (!$icon->exists()) {
                continue;
            }
            
            $icon->setModifiedTime();
        }
    }
}