[ImageThumbnail] Implement image resizing with Intervention/Image

plugins/ImageThumbnail/ImageThumbnail.php

@@ -20,8 +20,12 @@
 namespace Plugin\ImageThumbnail;
 
 use App\Core\Event;
+use function App\Core\I18n\_m;
 use App\Core\Modules\Module;
 use App\Core\Router\RouteLoader;
+use App\Entity\Attachment;
+use App\Util\Common;
+use Intervention\Image\Image;
 
 class ImageThumbnail extends Module
 {
@@ -30,4 +34,49 @@ class ImageThumbnail extends Module
         $r->connect('thumbnail', '/thumbnail/{id<\d+>}', [Controller\ImageThumbnail::class, 'thumbnail']);
         return Event::next;
     }
+
+    public static function getPath(Attachment $attachment)
+    {
+        return Common::config('attachments', 'dir') . $attachment->getFilename();
+    }
+
+    /**
+     * Resizes an image. It will reencode the image in the
+     * `self::prefferedType()` format. This only applies henceforward,
+     * not retroactively
+     *
+     * Increases the 'memory_limit' to the one in the 'attachments' section in the config, to
+     * enable the handling of bigger images, which can cause a peak of memory consumption, while
+     * encoding
+     *
+     * @throws Exception
+     */
+    public function onResizeImage(Attachment $attachment, string $outpath, int $width, int $height, bool $crop)
+    {
+        $old_limit = ini_set('memory_limit', Common::config('attachments', 'memory_limit'));
+
+        // try {
+        //     $img = Image::make($this->filepath);
+        // } catch (Exception $e) {
+        //     Log::error(__METHOD__ . ' encountered exception: ' . print_r($e, true));
+        //     // TRANS: Exception thrown when trying to resize an unknown file type.
+        //     throw new Exception(_m('Unknown file type'));
+        // }
+
+        // if (self::getPath($attachment) === $outpath) {
+        //     @unlink($outpath);
+        // }
+
+        // // Fit image to dimensions and optionally prevent upscaling
+        // if (!$crop) $img->fit($width, $height, function ($constraint) { $constraint->upsize();});
+        // else        $img->crop($width, $height);
+
+        // $img->save($outpath, 100, 'webp');
+        // $img->destroy();
+
+        // ini_set('memory_limit', $old_limit); // Restore the old memory limit
+
+        // return $outpath;
+        return Event::next;
+    }
 }