Issue #3281082 by kaszarobert: Add possibility to use sandbox API

src/Form/SettingsForm.php

@@ -83,6 +83,17 @@ class SettingsForm extends ConfigFormBase {
       '#description' => $this->t("Enter the specific identification for the issued invoices."),
       '#required' => FALSE,
     ];
+
+    $form['environment'] = [
+      '#type' => 'radios',
+      '#title' => $this->t('Environment'),
+      '#options' => [
+        'sandbox' => $this->t('Sandbox'),
+        'live' => $this->t('Live'),
+      ],
+      '#default_value' => $config->get('environment') ?? 'live',
+    ];
+
     return parent::buildForm($form, $form_state);
   }
 
@@ -98,6 +109,7 @@ class SettingsForm extends ConfigFormBase {
       ->set('constant', $form_state->getValue('constant'))
       ->set('specific', $form_state->getValue('specific'))
       ->set('maturity', $form_state->getValue('maturity'))
+      ->set('environment', $form_state->getValue('environment'))
       ->save();
     parent::submitForm($form, $form_state);
   }

src/InvoiceService.php

@@ -216,6 +216,10 @@ class InvoiceService {
     $api = new \SFAPIclient($values['email'], $values['api_key'], '', 'API', $company_id);
     if ($api) {
       $this->logger->info('Succesfully created Superfaktura API object.');
+
+      if ($config->get('environment') === 'sandbox') {
+        $api->useSandBox();
+      }
     }
     else {
       $this->logger->alert('Could not create the Superfaktura object');