From af780143bdd93ef84dfc98a20119884be3ccaa28 Mon Sep 17 00:00:00 2001
From: Oskari Kulmala <oskari@drupaletti.fi>
Date: Mon, 31 Aug 2015 15:59:23 +0300
Subject: [PATCH] Get real file uri

---
 core/lib/Drupal/Core/Template/TwigExtension.php | 56 +++++++++++++++++++++++++
 1 file changed, 56 insertions(+)

diff --git a/core/lib/Drupal/Core/Template/TwigExtension.php b/core/lib/Drupal/Core/Template/TwigExtension.php
index 443cf73..f76579d 100644
--- a/core/lib/Drupal/Core/Template/TwigExtension.php
+++ b/core/lib/Drupal/Core/Template/TwigExtension.php
@@ -12,9 +12,11 @@
 
 namespace Drupal\Core\Template;
 
+use Drupal\image\Entity\ImageStyle;
 use Drupal\Component\Utility\Html;
 use Drupal\Component\Utility\SafeMarkup;
 use Drupal\Component\Utility\SafeStringInterface;
+use Drupal\Core\Render\Element;
 use Drupal\Core\Render\RendererInterface;
 use Drupal\Core\Routing\UrlGeneratorInterface;
 use Drupal\Core\Theme\ThemeManagerInterface;
@@ -152,6 +154,8 @@ public function getFilters() {
       new \Twig_SimpleFilter('clean_id', '\Drupal\Component\Utility\Html::getId'),
       // This filter will render a renderable array to use the string results.
       new \Twig_SimpleFilter('render', array($this, 'renderVar')),
+      new \Twig_SimpleFilter('style', array($this, 'getImageStyleUrl')),
+      new \Twig_SimpleFilter('size', array($this, 'getImageFieldWithStyle')),
     );
   }
 
@@ -514,4 +518,56 @@ public function renderVar($arg) {
     return $this->renderer->render($arg);
   }
 
+  /**
+   * Wrapper around \Drupal\image\ImageStyleInterface::buildUrl().
+   *
+   * @param string $style
+   *   The image style.
+   * @param string $uri
+   *   Url to image.
+   *
+   * @return mixed
+   *   Image url with an image style applied to it.
+   */
+  public function getImageStyleUrl($uri, $style) {
+    $style = entity_load('image_style', $style);
+    
+    $query = \Drupal::entityQuery('file')
+      ->condition('filename', basename($uri), '=')
+      ->range(0,1);
+
+    $fids = $query->execute();
+
+    foreach($fids as $fid) {
+      return $style->buildUrl(\Drupal\file\Entity\File::load($fid)->getFileUri());
+    }
+  }
+
+  /**
+   * Function that returns a renderable array of an image field with a given
+   * image style.
+   *
+   * @param $field
+   *   Renderable array of a field.
+   * @param $style
+   *   an image style.
+   *
+   * @return mixed
+   *   a renderable array or NULL if there is no valid input.
+   */
+  public function getImageFieldWithStyle($field, $style) {
+    if(!isset($field['#field_type']) || $field['#field_type'] == 'image') {
+      return NULL;
+    }
+
+    $element_children = Element::children($field, TRUE);
+
+    if(!empty($element_children)) {
+      foreach ($element_children as $delta => $key) {
+        $field[$key]['#image_style'] = $style;
+      }
+    }
+
+    return $field;
+  }
 }
-- 
2.3.2 (Apple Git-55)