[ImageThumbnail] Implement image resizing with Intervention/Image

plugins/ImageThumbnail/Controller/ImageThumbnail.php

@@ -23,7 +23,10 @@ namespace Plugin\ImageThumbnail\Controller;
 
 use App\Core\Controller;
 use App\Core\DB\DB;
+use App\Entity\AttachmentThumbnail;
 use App\Util\Common;
+use Component\Media\Media;
+use Plugin\ImageThumbnail\ImageThumbnail as ThisPlugin;
 use Symfony\Component\HttpFoundation\Request;
 
 class ImageThumbnail extends Controller
@@ -33,9 +36,9 @@ class ImageThumbnail extends Controller
      */
     public function thumbnail(Request $request, int $id)
     {
-        $attachemnt = DB::findOneBy('attachment', ['id' => $id]);
-        if (!is_null($attachemnt->getScope())) {
-            // && ($attachemnt->scope | VisibilityScope::PUBLIC) != 0
+        $attachment = DB::findOneBy('attachment', ['id' => $id]);
+        if (!is_null($attachment->getScope())) {
+            // && ($attachment->scope | VisibilityScope::PUBLIC) != 0
             // $user = Common::ensureLoggedIn();
             assert(false, 'Attachment scope not implemented');
         }
@@ -48,6 +51,12 @@ class ImageThumbnail extends Controller
         $height     = Common::clamp($this->int('h') ?? $max_height, min: 0, max: $max_height);
         $crop       = $this->bool('c') ?? false;
 
-        dd($width, $height, $crop);
+        $filename = $attachment->getFilename();
+        $filepath = ThisPlugin::getPath($attachment);
+
+        $thumbnail = AttachmentThumbnail::getOrCreate(attachment: $attachment, width: $width, height: $height, crop: $crop);
+        dd($thumbnail);
+
+        return Media::sendFile(filepath: $filepath, mimetype: $attachment->getMimetype(), output_filename: $filename, disposition: 'inline');
     }
 }

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;
+    }
 }

plugins/ImageThumbnail/composer.json

@@ -0,0 +1,5 @@
+{
+    "require": {
+        "intervention/image": "2.5.1"
+    }
+}