class.ilPdfGenerator.php

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<?php
 
declare(strict_types=1);
 
use ILIAS\ResourceStorage\Services as IRSS;
use ILIAS\ResourceStorage\Identification\ResourceIdentification;
 
class ilPdfGenerator
{
    private ?ilLogger $logger = null;
 
    public function __construct(
        private readonly ilUserCertificateRepository $repository,
        private ?IRSS $irss = null,
        private ?ilCertificateRpcClientFactoryHelper $rpc = null,
        private ?ilCertificatePdfFileNameFactory $filename_factory = null,
        ?ilLanguage $lng = null
    ) {
        global $DIC;
 
        $this->irss = $irss ?? $DIC->resourceStorage();
        $this->rpc = $rpc ?? new ilCertificateRpcClientFactoryHelper();
        $this->filename_factory = $filename_factory ?? new ilCertificatePdfFileNameFactory(
            $lng ?? $DIC->language()
        );
    }
 
    public function withLogger(ilLogger $logger): self
    {
        $clone = clone $this;
        $clone->logger = $logger;
 
        return $clone;
    }
 
    public function generate(int $userCertificateId): string
    {
        $certificate = $this->repository->fetchCertificate($userCertificateId);
 
        return $this->createPDFScalar($certificate);
    }
 
    public function generateCurrentActiveCertificate(int $userId, int $objId): string
    {
        $certificate = $this->repository->fetchActiveCertificate($userId, $objId);
 
        return $this->createPDFScalar($certificate);
    }
 
    public function generateFileName(int $userId, int $objId): string
    {
        $certificate = $this->repository->fetchActiveCertificateForPresentation($userId, $objId);
 
        $user = ilObjectFactory::getInstanceByObjId($userId);
        if (!$user instanceof ilObjUser) {
            throw new ilException(sprintf('The usr_id "%s" does NOT reference a user', $userId));
        }
 
        return $this->filename_factory->create($certificate);
    }
 
    private function createPDFScalar(ilUserCertificate $certificate): string
    {
        $content = $certificate->getCertificateContent();
 
        $this->logger?->debug(
            'Delegating certificate PDF generation for certificate id {certificate_id} (user {user_id} and object {object_id}) to ilServer',
            [
                'certificate_id' => $certificate->getCertificateId()->asString(),
                'user_id' => $certificate->getUserId(),
                'object_id' => $certificate->getObjId()
            ]
        );
 
 
        $background_rid = $this->irss->manage()->find($certificate->getBackgroundImageIdentification());
        if ($background_rid instanceof ResourceIdentification) {
            $background_src = $this->irss->consume()->src($background_rid)->getSrc(true);
 
            $content = str_replace(
                ['[BACKGROUND_IMAGE]'],
                [$background_src],
                $content
            );
        }
 
        $pdf_base64 = $this->rpc->ilFO2PDF('RPCTransformationHandler', $content);
 
        $size = strlen(base64_decode($pdf_base64->scalar, true));
        $this->logger?->debug(
            'Received generated PDF with size {size} bytes for certificate id {certificate_id} (user {user_id} and object {object_id}) from ilServer',
            [
                'size' => $size,
                'certificate_id' => $certificate->getCertificateId()->asString(),
                'user_id' => $certificate->getUserId(),
                'object_id' => $certificate->getObjId()
            ]
        );
 
 
        return $pdf_base64->scalar;
    }
}