CalculateSRI.php

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<?php

namespace Elgg\Views;

class CalculateSRI {
    
    public function __invoke(\Elgg\Event $event) {
        $view = $event->getParam('view');
        if (empty($view)) {
            return;
        }
        
        $type = $event->getType();
        
        $data = _elgg_services()->serverCache->load('sri') ?? [];
        if (!isset($data[$type])) {
            $data[$type] = [];
        }
        
        if (isset($data[$type][$view])) {
            return;
        }
        
        $hash = base64_encode(hash('sha256', $event->getValue(), true));
        $data[$type][$view] = "sha256-{$hash}";
        _elgg_services()->serverCache->save('sri', $data);
    }
}