[ImageThumbnail] Implement image resizing with Intervention/Image

components/Media/Utils.php

@@ -206,4 +206,34 @@ abstract class Utils
             return ['file_path' => $filepath, 'mimetype' => 'image/svg+xml', 'title' => null];
         }
     }
+
+    // ------------------------------
+
+    /**
+     * Get the minor part of a mimetype. image/webp -> image
+     */
+    public static function mimetypeMajor(string $mime)
+    {
+        return explode('/', self::mimeBare($mime))[0];
+    }
+
+    /**
+     * Get the minor part of a mimetype. image/webp -> webp
+     */
+    public static function mimetypeMinor(string $mime)
+    {
+        return explode('/', self::mimeBare($mime))[1];
+    }
+
+    /**
+     *  Get only the mimetype and not additional info (separated from bare mime with semi-colon)
+     */
+    public static function mimeBare(string $mimetype)
+    {
+        $mimetype = mb_strtolower($mimetype);
+        if (($semicolon = mb_strpos($mimetype, ';')) !== false) {
+            $mimetype = mb_substr($mimetype, 0, $semicolon);
+        }
+        return trim($mimetype);
+    }
 }

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;
+    }
 }

src/Entity/AttachmentThumbnail.php

@@ -21,7 +21,13 @@
 
 namespace App\Entity;
 
+use App\Core\DB\DB;
 use App\Core\Entity;
+use App\Core\Event;
+use App\Core\Log;
+use App\Util\Exception\NotFoundException;
+use App\Util\Exception\ServerException;
+use Component\Media\Media;
 use DateTimeInterface;
 
 /**
@@ -92,6 +98,24 @@ class AttachmentThumbnail extends Entity
 
     // }}} Autocode
 
+    public static function getOrCreate(Attachment $attachment, ?int $width = null, ?int $height = null, ?bool $crop = null)
+    {
+        try {
+            return DB::findOneBy('attachment_thumbnail', ['attachment_id' => $attachment->getId(), 'width' => $width, 'height' => $height]);
+        } catch (NotFoundException $e) {
+            $outpath = $attachment->getFileHash() . '-' . $width . 'x' . $height;
+
+            $event_map  = ['image' => 'ResizeImage', 'video' => 'ResizeVideo'];
+            $major_mime = Media::mimetypeMajor($attachment->getMimetype());
+            if (in_array($major_mime, array_keys($event_map))) {
+                Event::handle($event_map[$major_mime], [$attachment, $outpath, $width, $height, $crop]);
+            } else {
+                Log::debug($m = ('Cannot resize attachment with mimetype ' . $attachment->getMimetype()));
+                throw new ServerException($m);
+            }
+        }
+    }
+
     /**
      * Delete a attachment thumbnail. This table doesn't own all the attachments, only itself
      */