Show a preview image in builtin attachment select autocomplete.

src/Controller/TypeaheadController.php

@@ -42,9 +42,11 @@ declare(strict_types=1);
 
 namespace App\Controller;
 
+use App\Services\Attachments\AttachmentURLGenerator;
 use App\Services\Attachments\BuiltinAttachmentsFinder;
 use App\Services\TagFinder;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\Asset\Packages;
 use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Routing\Annotation\Route;
@@ -59,6 +61,15 @@ use Symfony\Component\Serializer\Serializer;
  */
 class TypeaheadController extends AbstractController
 {
+    protected $urlGenerator;
+    protected $assets;
+
+    public function __construct(AttachmentURLGenerator $URLGenerator, Packages $assets)
+    {
+        $this->urlGenerator = $URLGenerator;
+        $this->assets = $assets;
+    }
+
     /**
      * @Route("/builtInResources/search", name="typeahead_builtInRessources")
      *
@@ -69,6 +80,15 @@ class TypeaheadController extends AbstractController
         $query = $request->get('query');
         $array = $finder->find($query);
 
+        $result = [];
+
+        foreach ($array as $path) {
+            $result[] = [
+                'name' => $path,
+                'image' => $this->assets->getUrl($this->urlGenerator->placeholderPathToAssetPath($path)),
+            ];
+        }
+
         $normalizers = [
             new ObjectNormalizer(),
         ];
@@ -76,7 +96,7 @@ class TypeaheadController extends AbstractController
             new JsonEncoder(),
         ];
         $serializer = new Serializer($normalizers, $encoders);
-        $data = $serializer->serialize($array, 'json');
+        $data = $serializer->serialize($result, 'json');
 
         return new JsonResponse($data, 200, [], true);
     }

src/Services/Attachments/AttachmentPathResolver.php

@@ -101,6 +101,7 @@ class AttachmentPathResolver
     /**
      * Converts a path passed by parameter from services.yaml (which can be an absolute path or relative to project dir)
      * to an absolute path. When a relative path is passed, the directory must exist or null is returned.
+     * Returns an absolute path with "/" no matter, what system is used.
      *
      * @internal
      *
@@ -132,8 +133,8 @@ class AttachmentPathResolver
             return null;
         }
 
-        //Otherwise return resolved path
-        return $tmp;
+        //Normalize file path (use / instead of \)
+        return str_replace('\\', '/', $tmp);
     }
 
     /**

src/Services/Attachments/AttachmentURLGenerator.php

@@ -91,6 +91,8 @@ class AttachmentURLGenerator
             $public_path = $this->public_path;
         }
 
+
+
         //Our absolute path must begin with public path or we can not use it for asset pathes.
         if (0 !== strpos($absolute_path, $public_path)) {
             return null;
@@ -100,6 +102,19 @@ class AttachmentURLGenerator
         return substr($absolute_path, strlen($public_path) + 1);
     }
 
+    /**
+     * Converts a placeholder path to a path to a image path.
+     *
+     * @param string      $placeholder_path the placeholder path that should be converted
+     *
+     * @return string|null
+     */
+    public function placeholderPathToAssetPath(string $placeholder_path): ?string
+    {
+        $absolute_path = $this->pathResolver->placeholderToRealPath($placeholder_path);
+        return $this->absolutePathToAssetPath($absolute_path);
+    }
+
     /**
      * Returns a URL under which the attachment file can be viewed.
      */