add FilterManager::applyFilter

Imagine/Filter/FilterManager.php

@@ -54,6 +54,8 @@ public function getFilterConfiguration()
     /**
      * Returns a response containing the given image after applying the given filter on it.
      *
+     * @uses FilterManager::applyFilterSet
+     *
      * @param Request $request
      * @param string $filter
      * @param ImageInterface $image
@@ -65,15 +67,7 @@ public function get(Request $request, $filter, ImageInterface $image, $localPath
     {
         $config = $this->getFilterConfiguration()->get($filter);
 
-        foreach ($config['filters'] as $filter => $options) {
-            if (!isset($this->loaders[$filter])) {
-                throw new \InvalidArgumentException(sprintf(
-                    'Could not find filter loader for "%s" filter type', $filter
-                ));
-            }
-
-            $image = $this->loaders[$filter]->load($image, $options);
-        }
+        $image = $this->applyFilter($image, $filter);
 
         if (empty($config['format'])) {
             $format = pathinfo($localPath, PATHINFO_EXTENSION);
@@ -93,4 +87,31 @@ public function get(Request $request, $filter, ImageInterface $image, $localPath
 
         return new Response($image, 200, array('Content-Type' => $contentType));
     }
+
+    /**
+     * Apply the provided filter set on the given Image.
+     *
+     * @param ImageInterface $image
+     * @param string $filter
+     *
+     * @return ImageInterface
+     *
+     * @throws \InvalidArgumentException
+     */
+    public function applyFilter(ImageInterface $image, $filter)
+    {
+        $config = $this->getFilterConfiguration()->get($filter);
+
+        foreach ($config['filters'] as $eachFilter => $eachOptions) {
+            if (!isset($this->loaders[$eachFilter])) {
+                throw new \InvalidArgumentException(sprintf(
+                    'Could not find filter loader for "%s" filter type', $eachFilter
+                ));
+            }
+
+            $image = $this->loaders[$eachFilter]->load($image, $eachOptions);
+        }
+
+        return $image;
+    }
 }

Tests/Imagine/Filter/FilterManagerTest.php

@@ -181,6 +181,41 @@ public function testGetRequestKnowsContentType()
         $this->assertEquals('image/jpeg', $response->headers->get('Content-Type'));
     }
 
+    public function testApplyFilterSet()
+    {
+        $image = $this->getMockImage();
+
+        $thumbConfig = array(
+            'size' => array(180, 180),
+            'mode' => 'outbound',
+        );
+
+        $config = $this->getMockFilterConfiguration();
+        $config
+            ->expects($this->atLeastOnce())
+            ->method('get')
+            ->with('thumbnail')
+            ->will($this->returnValue(array(
+                'filters' => array(
+                    'thumbnail' => $thumbConfig,
+                ),
+            )))
+        ;
+
+        $loader = $this->getMockLoader();
+        $loader
+            ->expects($this->once())
+            ->method('load')
+            ->with($image, $thumbConfig)
+            ->will($this->returnValue($image))
+        ;
+
+        $filterManager = new FilterManager($config);
+        $filterManager->addLoader('thumbnail', $loader);
+
+        $this->assertSame($image, $filterManager->applyFilter($image, 'thumbnail'));
+    }
+
     protected function getMockLoader()
     {
         return $this->getMock('Liip\ImagineBundle\Imagine\Filter\Loader\LoaderInterface');