Added route and controller for adding new contact details to a person

src/Controller/ContactDetailsController.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace Drupal\zencrm\Controller;
+
+use Drupal\Core\Controller\ControllerBase;
+
+/**
+ * Class ContactDetailsController.
+ */
+class ContactDetailsController extends ControllerBase {
+
+  /**
+   * Outputs a form for creating contact details, with the person
+   * already populated (person is not shown on the form).
+   */
+  public function createContactDetailsForPerson($person_id) {
+    $values = array(
+      'person' =>  $person_id
+    );
+
+    $node = \Drupal::entityTypeManager()
+      ->getStorage('contact_details')
+      ->create($values);
+
+    $form = \Drupal::entityTypeManager()
+      ->getFormObject('contact_details', 'default')
+      ->setEntity($node);
+    return \Drupal::formBuilder()->getForm($form);
+  }
+
+}

src/Plugin/Block/HatCreator.php

@@ -31,7 +31,7 @@ class HatCreator extends BlockBase {
         ->loadByProperties(['type' => $id, 'person' => $person_id]);
       if (!reset($hats)) {
         $label = $type['label'];
-        $markup .= "<p><a class='use-ajax' data-dialog-type='modal' href='/zencrm/hat/add/$id/$person_id?destination=/zencrm/person/$person_id'>Create $label Hat</a></p>";
+        $markup .= "<p><a class='use-ajax' data-dialog-type='modal' href='/zencrm/hat/add/$id/$person_id?destination=/zencrm/person/$person_id'>Add a $label Hat</a></p>";
       }
     }
     return [

zencrm.routing.yml

@@ -5,3 +5,11 @@ zencrm.hat.create:
     _title: 'Add New Hat'
   requirements:
     _permission: 'access content'
+
+zencrm.contact_details.create:
+  path: '/zencrm/contact_details/add/{person_id}'
+  defaults:
+    _controller: '\Drupal\zencrm\Controller\ContactDetailsController::createContactDetailsForPerson'
+    _title: 'Add New Contact Details'
+  requirements:
+    _permission: 'access content'