API changes for Zapier

app/Http/Controllers/BaseAPIController.php

@@ -225,4 +225,15 @@ class BaseAPIController extends Controller
 
         return $data;
     }
+
+    protected function fileReponse($name, $data)
+    {
+        header('Content-Type: application/pdf');
+        header('Content-Length: ' . strlen($data));
+        header('Content-disposition: attachment; filename="' . $name . '"');
+        header('Cache-Control: public, must-revalidate, max-age=0');
+        header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+        return $data;
+    }
 }

app/Http/Controllers/InvoiceApiController.php

@@ -184,6 +184,10 @@ class InvoiceApiController extends BaseAPIController
                         ->with('client', 'invoice_items', 'invitations')
                         ->first();
 
+        if (isset($data['download_invoice']) && boolval($data['download_invoice'])) {
+            return $this->fileReponse($invoice->getFileName(), $invoice->getPDFString());
+        }
+
         return $this->itemResponse($invoice);
     }
 
@@ -361,14 +365,7 @@ class InvoiceApiController extends BaseAPIController
     public function download(InvoiceRequest $request)
     {
         $invoice = $request->entity();
-        $pdfString = $invoice->getPDFString();
 
-        header('Content-Type: application/pdf');
-        header('Content-Length: ' . strlen($pdfString));
-        header('Content-disposition: attachment; filename="' . $invoice->getFileName() . '"');
-        header('Cache-Control: public, must-revalidate, max-age=0');
-        header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
-
-        return $pdfString;
+        return $this->fileReponse($invoice->getFileName(), $invoice->getPDFString());
     }
 }

app/Ninja/Transformers/PaymentTransformer.php

@@ -57,6 +57,7 @@ class PaymentTransformer extends EntityTransformer
             'is_deleted' => (bool) $payment->is_deleted,
             'payment_type_id' => (int) $payment->payment_type_id,
             'invoice_id' => (int) ($this->invoice ? $this->invoice->public_id : $payment->invoice->public_id),
+            'invoice_number' => $this->invoice ? $this->invoice->invoice_number : $payment->invoice->invoice_number,
         ]);
     }
 }