Explicit check for pdfexport

Author: TheSyscall

application/controllers/ReportController.php

@@ -8,6 +8,7 @@
 use Exception;
 use Icinga\Application\Hook;
 use Icinga\Application\Hook\PdfexportHook;
+use Icinga\Application\Modules\Module;
 use Icinga\Module\Pdfexport\ProvidedHook\Pdfexport;
 use Icinga\Module\Reporting\Database;
 use Icinga\Module\Reporting\Model;
@@ -246,6 +247,9 @@ public function downloadAction(): void
         switch ($type) {
             case 'pdf':
                 // TODO: Remove this once the dependency on the Pdfexport module is removed
+                if (Module::exists('pdfexport')) {
+                    throw new Exception('The pdfexport module is not installed');
+                }
                 $exporter = method_exists(PdfexportHook::class, 'first')
                     ? PdfexportHook::first()
                     : Pdfexport::first();