Update Product.php & ProductController.php (#838)

* Update Product.php & ProductController.php

move getFormClass() to controller as SS complains:
 method 'getFormClass' does not exist on 'SilverShop\Page\ProductController'

also had to rollback the $this->data()->getFormClass() update to be $this->getFormClass()

* Fix linting issues

Author: tomstgeorge

src/Page/Product.php

@@ -491,15 +491,4 @@ public function removeAllLink(): string|bool
     {
         return ShoppingCartController::remove_all_item_link($this);
     }
-
-    /**
-     * Get the form class to use to edit this product in the frontend
-     * @return string FQCN
-     */
-    public function getFormClass(): string
-    {
-        $formClass = AddProductForm::class;
-        $this->extend('updateFormClass', $formClass);
-        return $formClass;
-    }
 }

src/Page/ProductController.php

@@ -4,6 +4,7 @@
 
 use PageController;
 use SilverStripe\Core\Injector\Injector;
+use SilverShop\Forms\AddProductForm;
 
 class ProductController extends PageController
 {
@@ -14,8 +15,19 @@ class ProductController extends PageController
 
     public function Form()
     {
-        $form = Injector::inst()->create($this->data()->getFormClass(), $this, 'Form');
+        $form = Injector::inst()->create($this->getFormClass(), $this, 'Form');
         $this->extend('updateForm', $form);
         return $form;
     }
+
+    /**
+    * Get the form class to use to edit this product in the frontend
+    * @return string FQCN
+    */
+    public function getFormClass(): string
+    {
+        $formClass = AddProductForm::class;
+        $this->extend('updateFormClass', $formClass);
+        return $formClass;
+    }
 }