Add page numbers to PDFs, fixes #39

app/Http/Controllers/InvoiceController.php

@@ -76,24 +76,43 @@ public function preview($id)
             'isPDF' => false,
             'fontPath' => '/storage/fonts',
             'giroCode' => $giroCode,
+            'totalPages' => 1
         ]);
     }
 
+
+
     // https://www.itsolutionstuff.com/post/laravel-dompdf-table-with-page-break-exampleexample.html
     public function exportPdf($id)
     {
         $invoice = self::single($id);
         $giroCode = $this->generateGiroCode($invoice['totalAmount'], $invoice['nr'], $invoice['title']);
 
-        $pdf = Pdf::loadView('invoice', [
+        $viewData = [
             'invoice' => $invoice,
             'isPDF' => true,
             'fontPath' => public_path('storage/fonts/'),
             'giroCode' => $giroCode,
-        ]);
-        $pdf->setOption(['isRemoteEnabled' => true]);
-        $pdf->setOption(['fontDir' => public_path('storage/fonts/')]);
-        $pdf->setOption(['fontCache' => public_path('storage/fonts/')]);
+            'totalPages' => 1
+        ];
+
+        $options = [
+            'isRemoteEnabled' => true,
+            'fontDir' => public_path('storage/fonts/'),
+            'fontCache' => public_path('storage/fonts/')
+        ];
+
+        $pdf = Pdf::loadView('invoice', $viewData);
+        $pdf->setOptions($options, true);
+        $pdf->render();
+
+        // if there’s more than one page, inject page number an render again
+        // https://github.com/dompdf/dompdf/issues/1636
+        $viewData['totalPages'] = $pdf->getCanvas()->get_page_count();
+        if ($viewData['totalPages'] > 1) {
+            $pdf = Pdf::loadView('invoice', $viewData);
+            $pdf->setOptions($options, true);
+        }
 
         return $pdf->stream($invoice['nr'] . '.pdf');
         // return $pdf->download($this->getFilename($invoice) . '.pdf');
@@ -265,14 +284,14 @@ public function exportXml($id)
             //  string|null $chargeFreeQuantityUnitCpde __BT-X-46-0, From EXTENDED__ Unit of measure code for the quantity free of charge
             //  float|null  $packageQuantity            __BT-X-47, From EXTENDED__ Number of packages
             //  string|null $packageQuantityUnitCode    __BT-X-47-0, From EXTENDED__ Unit of measure code for number of packages
-            
+
             // TODO: this needs to be properly mapped. It should probably become a database item, the user can manage
             $units = [
                 'Stück' => ZugferdUnitCodes::REC20_PIECE,
                 'Stunden' => ZugferdUnitCodes::REC20_HOUR,
                 'Tage' => ZugferdUnitCodes::REC20_WORKING_DAY,
                 'pauschal' => ZugferdUnitCodes::REC20_LUMP_SUM
-            ];             
+            ];
             $document->setDocumentPositionQuantity(
                 $item['quantity'],
                 $units[$item['unit']] ?? ZugferdUnitCodes::REC20_PIECE