Experimenting with a preview for attachments.

app/Http/Controllers/AttachmentController.php

@@ -8,6 +8,7 @@ use FireflyIII\Helpers\Attachments\AttachmentHelperInterface;
 use FireflyIII\Http\Requests\AttachmentFormRequest;
 use FireflyIII\Models\Attachment;
 use FireflyIII\Repositories\Attachment\AttachmentRepositoryInterface;
+use FireflyIII\Support\CacheProperties;
 use Input;
 use Preferences;
 use Session;
@@ -115,6 +116,59 @@ class AttachmentController extends Controller
         }
     }
 
+    /**
+     * @param Attachment $attachment
+     */
+    public function preview(AttachmentHelperInterface $helper, Attachment $attachment)
+    {
+        if (!function_exists('imagecreatetruecolor')) {
+            abort(500);
+        }
+
+
+        $mime  = $attachment->mime;
+        $cache = new CacheProperties;
+        $cache->addProperty('preview-attachment');
+        $cache->addProperty($attachment->id);
+        if ($cache->has()) {
+            header('Content-Type: image/png');
+
+            return $cache->get();
+        }
+
+        switch ($mime) {
+            default:
+                $img = imagecreatetruecolor(100, 10);
+                imagesavealpha($img, true);
+
+                $trans_colour = imagecolorallocatealpha($img, 0, 0, 0, 127);
+                imagefill($img, 0, 0, $trans_colour);
+                header('Content-Type: image/png');
+                imagepng($img);
+                imagedestroy($img);
+                $cache->store($img);
+                exit;
+                break;
+            case 'image/jpeg':
+            case 'image/png':
+                $img      = imagecreatetruecolor(100, 100);
+                $source   = $helper->getAttachmentLocation($attachment);
+                $decrypt  = Crypt::decrypt(file_get_contents($source));
+                $original = imagecreatefromstring($decrypt);
+                $width    = imagesx($original);
+                $height   = imagesy($original);
+
+                imagecopyresampled($img, $original, 0, 0, 0, 0, 100, 100, $width, $height);
+
+                header('Content-Type: image/png');
+                imagepng($img);
+                imagedestroy($img);
+                exit;
+
+                break;
+        }
+    }
+
 
     /**
      * @param AttachmentFormRequest         $request

resources/twig/transactions/show.twig

@@ -93,7 +93,7 @@
                                     </td>
                                     <td>
                                         <i class="fa {{ att.mime|mimeIcon }}"></i>
-                                        <a href="{{ route('attachments.download', att.id) }}" title="{{ att.filename }}">
+                                        <a href="{{ route('attachments.download', att.id) }}"   tle="{{ att.filename }}">
                                             {% if att.title %}
                                                 {{ att.title }}
                                             {% else %}
@@ -106,6 +106,9 @@
                                             <em>{{ att.description }}</em>
                                         {% endif %}
                                     </td>
+                                    <td style="width:100px;">
+                                        <img src="{{ route('attachments.preview', att.id) }}"></img>
+                                    </td>
                                 </tr>
                             {% endfor %}
                         </table>