Issue #2853800: Update endpoint, make configurable.

config/install/fillpdf.settings.yml

 remote_protocol: https
 
 # Should not contain a protocol. That's what the above is for.
-remote_endpoint: fillpdf-service.com/xmlrpc.php
+remote_endpoint: fillpdf.io/xmlrpc.php
 
 scheme: public

fillpdf.install

@@ -113,3 +113,17 @@ function fillpdf_update_8104() {
 function fillpdf_update_8105() {
   \Drupal::getContainer()->get('module_installer')->install(['serialization']);
 }
+
+/**
+ * Update default FillPDF Service endpoint (if it's currently the default).
+ */
+function fillpdf_update_8106() {
+  $config = \Drupal::getContainer()->get('config.factory');
+  $settings = $config->getEditable('fillpdf.settings');
+  if ($settings->get('remote_endpoint') === 'fillpdf-service.com/xmlrpc.php') {
+    $settings->set('remote_endpoint', 'fillpdf.io/xmlrpc.php');
+    $settings->save();
+  }
+
+  return t('Default FillPDF Service endpoint updated to fillpdf.io/xmlrpc.php.');
+}

src/Form/FillPdfSettingsForm.php

@@ -55,7 +55,7 @@ class FillPdfSettingsForm extends ConfigFormBase {
     $options = [
       'pdftk' => $this->t('Use locally-installed pdftk: You will need a VPS or a dedicated server so you can install pdftk: (!see_documentation).', ['!see_documentation' => $this->l($this->t('see documentation'), Url::fromUri('http://drupal.org/documentation/modules/fillpdf'))]),
       'local' => $this->t('Use locally-installed PHP/JavaBridge: You will need a VPS or dedicated server so you can deploy PHP/JavaBridge on Apache Tomcat: (!see_documentation).', ['!see_documentation' => $this->l($this->t('see documentation'), Url::fromUri('http://drupal.org/documentation/modules/fillpdf'))]),
-      'fillpdf_service' => $this->t('Use FillPDF Service: Sign up for <a href="https://fillpdf-service.com">FillPDF Service</a>.'),
+      'fillpdf_service' => $this->t('Use FillPDF Service: Sign up for <a href="https://fillpdf.io">FillPDF Service</a>.'),
     ];
 
     // Check for JavaBridge.
@@ -82,17 +82,23 @@ class FillPdfSettingsForm extends ConfigFormBase {
       '#collapsible' => TRUE,
       '#collapsed' => $fillpdf_service !== 'fillpdf_service',
     ];
+    $form['fillpdf_service']['remote_endpoint'] = [
+      '#type' => 'textfield',
+      '#title' => $this->t('Server endpoint'),
+      '#default_value' => $config->get('remote_endpoint'),
+      '#description' => $this->t('The endpoint for the FillPDF Service instance. This does not usually need to be changed, but you may want to if you have, for example, a <a href="https://fillpdf.io/hosting">private server</a>. Do not include the protocol, as this is determined by the <em>Use HTTPS?</em> setting below.'),
+    ];
     $form['fillpdf_service']['fillpdf_service_api_key'] = [
       '#type' => 'textfield',
       '#title' => $this->t('API Key'),
       '#default_value' => $config->get('fillpdf_service_api_key'),
-      '#description' => $this->t('You need to sign up for an API key at <a href="https://fillpdf-service.com">FillPDF Service</a>'),
+      '#description' => $this->t('You need to sign up for an API key at <a href="https://fillpdf.io">FillPDF Service</a>'),
     ];
     $form['fillpdf_service']['remote_protocol'] = [
       '#type' => 'radios',
       '#title' => $this->t('Use HTTPS?'),
       '#description' => $this->t('It is recommended to select <em>Use HTTPS</em> for this option. Doing so will help prevent
-      sensitive information in your PDFs from being intercepted in transit between your server and the remote service.'),
+      sensitive information in your PDFs from being intercepted in transit between your server and the remote service. <strong>FillPDF Service will only work with HTTPS.</strong>'),
       '#default_value' => $config->get('remote_protocol'),
       '#options' => [
         'https' => $this->t('Use HTTPS'),
@@ -128,6 +134,7 @@ class FillPdfSettingsForm extends ConfigFormBase {
     // Save form values.
     $this->config('fillpdf.settings')
       ->set('backend', $form_state->getValue('backend'))
+      ->set('remote_endpoint', $form_state->getValue('remote_endpoint'))
       ->set('fillpdf_service_api_key', $form_state->getValue('fillpdf_service_api_key'))
       ->set('remote_protocol', $form_state->getValue('remote_protocol'))
       ->set('pdftk_path', $form_state->getValue('pdftk_path'))