Only show pdf in email send dialog if there is a a valid pdf exporter

Author: TheSyscall

library/Reporting/Actions/SendMail.php

@@ -6,6 +6,7 @@
 namespace Icinga\Module\Reporting\Actions;
 
 use Icinga\Application\Config;
+use Icinga\Application\Hook;
 use Icinga\Application\Logger;
 use Icinga\Module\Pdfexport\ProvidedHook\Pdfexport;
 use Icinga\Module\Reporting\Hook\ActionHook;
@@ -79,7 +80,11 @@ function ($pdf) use ($mail, $name, $recipients) {
 
     public function initConfigForm(Form $form, Report $report)
     {
-        $types = ['pdf' => 'PDF'];
+        $types = [];
+
+        if (Hook::has('Pdfexport')) {
+            $types['pdf'] = 'PDF';
+        }
 
         if ($report->providesData()) {
             $types['csv'] = 'CSV';