Implementing resolveUsing, displayUsing and fillUsing

README.md

@@ -151,6 +151,32 @@ By default, the field takes advantage of a **JSON column** on your model's table
 
 Tell the field how to store and retrieve its content by creating your own Resolver class, which basically just contains two simple methods: `get` and `set`. [See the docs for more information on this](https://whitecube.github.io/nova-flexible-content/#/?id=custom-resolver-classes).
 
+### resolveUsing, displayUsing, fillUsing
+
+This package implements the default nova methods to alter data on resolving and updating. 
+
+The resolveUsing/displayUsing needs to perform retrieve the data and format it. This differs from the default usage of these methods. This is why the flexible instance is added to the callback.
+
+```php
+Flexible::make('Content', 'content')
+    ->resolveUsing(function ($flexible, $resource, $attribute) {
+        $value = $flexible->resolveGroups($flexible->buildGroups($resource, $attribute));
+
+        return $value;
+    })
+```
+
+The fillUsing method allows you to alter the data or store the data on a different model/column.
+
+```php
+Flexible::make('Content', 'content')
+    ->fillUsing(function ($request, $model, $attribute, $requestAttribute) {
+        $value = $request->{$requestAttribute};
+
+        $model->{$attribute} = $value;
+    })
+```
+
 ### Usage with nova-page
 
 Maybe you heard of one of our other packages, [nova-page](https://github.com/whitecube/nova-page), which is a Nova Tool that allows to edit static pages such as an _"About"_ page (or similar) without having to declare a model for it individually. More often than not, the Flexible Content Field comes in handy. Don't worry, both packages work well together! First create a [nova page template](https://github.com/whitecube/nova-page#creating-templates) and add a [flexible content](https://github.com/whitecube/nova-flexible-content#adding-layouts) to the template's fields.

src/Flexible.php

@@ -2,13 +2,11 @@
 
 namespace Whitecube\NovaFlexibleContent;
 
-use Illuminate\Support\Str;
 use Laravel\Nova\Fields\Field;
 use Laravel\Nova\Http\Requests\NovaRequest;
 use Whitecube\NovaFlexibleContent\Http\ScopedRequest;
 use Whitecube\NovaFlexibleContent\Value\Resolver;
 use Whitecube\NovaFlexibleContent\Value\ResolverInterface;
-use Whitecube\NovaFlexibleContent\Layouts\Preset;
 use Whitecube\NovaFlexibleContent\Layouts\Layout;
 use Whitecube\NovaFlexibleContent\Layouts\LayoutInterface;
 use Whitecube\NovaFlexibleContent\Layouts\Collection as LayoutsCollection;
@@ -243,6 +241,12 @@ public function resolve($resource, $attribute = null)
     {
         $attribute = $attribute ?? $this->attribute;
 
+        if ($this->resolveCallback && is_callable($this->resolveCallback)) {
+            $this->value = call_user_func($this->resolveCallback, $this, $resource, $attribute);
+
+            return;
+        }
+
         $this->registerOriginModel($resource);
 
         $this->buildGroups($resource, $attribute);
@@ -261,11 +265,13 @@ public function resolveForDisplay($resource, $attribute = null)
     {
         $attribute = $attribute ?? $this->attribute;
 
-        $this->registerOriginModel($resource);
+        if ($this->displayCallback && is_callable($this->displayCallback)) {
+            $this->value = call_user_func($this->displayCallback, $this, $resource, $attribute);
 
-        $this->buildGroups($resource, $attribute);
+            return;
+        }
 
-        $this->value = $this->resolveGroupsForDisplay($this->groups);
+        $this->resolve($resource, $attribute);
     }
 
     /**
@@ -305,7 +311,13 @@ protected function fillAttribute(NovaRequest $request, $requestAttribute, $model
 
         $callbacks = collect($this->syncAndFillGroups($request, $requestAttribute));
 
-        $this->value = $this->resolver->set($model, $attribute, $this->groups);
+        $request->{$attribute} = $this->resolver->set($model, $attribute, $this->groups);
+
+        if (isset($this->fillCallback)) {
+            return call_user_func(
+                $this->fillCallback, $request, $model, $attribute, $requestAttribute
+            );
+        }
 
         if($callbacks->isEmpty()) {
             return;
@@ -399,7 +411,7 @@ protected function extractValue(NovaRequest $request, $attribute)
      * @param  Illuminate\Support\Collection  $groups
      * @return Illuminate\Support\Collection
      */
-    protected function resolveGroups($groups)
+    public function resolveGroups($groups)
     {
         return $groups->map(function($group) {
             return $group->getResolved();
@@ -428,7 +440,7 @@ protected function resolveGroupsForDisplay($groups)
      * @param  string $attribute
      * @return Illuminate\Support\Collection
      */
-    protected function buildGroups($resource, $attribute)
+    public function buildGroups($resource, $attribute)
     {
         if(!$this->resolver) {
             $this->resolver(Resolver::class);