Added multicurrency support (#43)

Author: harism2

Src/Controllers/Frontend/CheckoutController.php

@@ -90,9 +90,11 @@ public function getOrderData($paymentMethod, $formParams = null)
             $buyer['zip_code'] = $customer->cPLZ;
 
         $buyer['is_registered'] = $customer->kKunde != null;
+
+        $currency = Frontend::getCurrency()->getCode();
 
         $data = [
-            'currency' => 'EUR',
+            'currency' => $currency,
             'state_flow' => $this->configService->getOrderFlow(),
             'payment_method' => $this->getPaymentMethod($paymentMethod),
             'gross_amount_cents' => round($basket->total[1] * 100),

Src/Controllers/Frontend/InvoicesController.php

@@ -54,10 +54,11 @@ public function create()
         }
 
         $invoiceData = [
+            'currency' => $bestellung->Waehrung->code,
             'order_uuid' => $monduOrder->order_uuid,
             'external_reference_id' => (string) $invoiceId,
             'invoice_url' => 'http://localhost',
-            'gross_amount_cents' => round(round(floatval($bestellung->fGesamtsumme), 2) * 100),
+            'gross_amount_cents' => round(round(floatval($bestellung->fGesamtsummeKundenwaehrung), 2) * 100),
             'line_items' => $invoiceLineItems
         ];