Merge pull request #80 from Mohammad-Alavi/allow-accessing-the-transf…

…ormer

Allow accessing the transformer

src/Fractal.php

@@ -6,6 +6,7 @@
 use League\Fractal\Manager;
 use League\Fractal\Pagination\CursorInterface;
 use League\Fractal\Pagination\PaginatorInterface;
+use League\Fractal\TransformerAbstract;
 use Spatie\Fractalistic\Exceptions\InvalidTransformation;
 use Spatie\Fractalistic\Exceptions\NoTransformerSpecified;
 use Traversable;
@@ -21,7 +22,7 @@ class Fractal implements JsonSerializable
     /** @var string|\League\Fractal\Serializer\SerializerAbstract */
     protected $serializer;
 
-    /** @var string|callable|\League\Fractal\TransformerAbstract */
+    /** @var string|callable|\League\Fractal\TransformerAbstract|null */
     protected $transformer;
 
     /** @var \League\Fractal\Pagination\PaginatorInterface */
@@ -177,7 +178,7 @@ protected function determineDataType($data)
     /**
      * Set the class or function that will perform the transform.
      *
-     * @param string|callable|\League\Fractal\TransformerAbstract $transformer
+     * @param string|callable|\League\Fractal\TransformerAbstract|null $transformer
      *
      * @return $this
      */
@@ -463,6 +464,16 @@ public function jsonSerialize(): ?array
         return $this->toArray();
     }
 
+    /**
+     * Get the transformer.
+     *
+     * @return string|callable|\League\Fractal\TransformerAbstract|null
+     */
+    public function getTransformer()
+    {
+        return $this->transformer;
+    }
+
     /**
      * Support for magic methods to included data.
      *

tests/FractalTest.php

@@ -228,3 +228,27 @@
 
     assertEquals($expectedArray, $jsonSerialized);
 });
+
+it('can get the transformer', function ($transformer): void {
+    $fractal = Fractal::create();
+    $fractal->transformWith($transformer);
+
+    $result = $fractal->getTransformer();
+
+    expect($result)->toBe($transformer);
+})->with([
+    'instance' => [
+        new TestTransformer(),
+    ],
+    'fqcn' => [
+        TestTransformer::class,
+    ],
+    'callable' => [
+        function (): array {
+            return [];
+        },
+    ],
+    'null' => [
+        null,
+    ]
+]);