fix overlapping pages on PDF thumbnail generation

app/Http/Controllers/MediaController.php

@@ -233,6 +233,13 @@ class MediaController extends Controller
 
         if(!$exists) {
             $media->generateVariants(false);
+        } else {
+            // find media with the same hash that also has variants and copy them
+            $mediaWithVariants = Media::where('hash', $hash)->where('variants', '!=', '')->orderBy('created_at')->first();
+            if($mediaWithVariants) {
+                $media->variants = $mediaWithVariants->variants;
+                $media->save();
+            }
         }
 
         unlink($file->getRealPath());

app/Jobs/Media/GenerateVariants.php

@@ -158,7 +158,12 @@ class GenerateVariants implements ShouldQueue
             $height = $variantData['thumbnail']['height'];
 
             $manager = new ImageManager(new Driver());
-            $image = $manager->read($temp);
+
+            $imagick = new \Imagick();
+            $imagick->readImage($temp . '[0]'); // Read the first page of the PDF
+            $imagick->setImageFormat('png');
+
+            $image = $manager->read($imagick);
             $image->scaleDown($width, $height);
 
             $variantFile = $tempDir . '/' . $media->hash . '-thumbnail.webp';