[address] allow to add custom data on addresses

Form/Type/AddressType.php

@@ -39,6 +39,8 @@ use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
  * - `null_if_empty` (boolean): replace the address type by null if the street
  * or the postCode is empty. This is useful when the address is not required and
  * embedded in another form.
+ * - `customize_data` (callable): allow to add custom field to the form, which
+ * will be store in the `customs` property
  */
 class AddressType extends AbstractType
 {
@@ -80,9 +82,19 @@ class AddressType extends AbstractType
                 ]);
         }
         
+        if ($options['customize_data'] !== NULL && is_callable($options['customize_data'])) {
+            $customsBuilder = $builder->create('customs', NULL, [ 
+                'compound' => true,
+                'label' => false
+                ]);
+            \call_user_func($options['customize_data'], $customsBuilder);
+            $builder->add($customsBuilder);
+        }
+        
         if ($options['null_if_empty'] === TRUE) {
             $builder->setDataMapper(new AddressDataMapper());
         }
+
     }
     
     public function configureOptions(OptionsResolver $resolver)
@@ -98,6 +110,8 @@ class AddressType extends AbstractType
             ->setDefined('null_if_empty')
             ->setDefault('null_if_empty', false)
             ->setAllowedTypes('null_if_empty', 'bool')
+            ->setDefined('customize_data')
+            ->setAllowedTypes('customize_data', 'callable')
             ;
     }
 }