oc-resizer-plugin/compressors/PdfCompressor.php

<?php

namespace Aweos\Resizer\Compressors;

use Illuminate\Support\Collection;
use Intervention\Image\ImageManager;
use Storage;

class PdfCompressor extends Compressor
{

    public function getExtensionRegex(): string
    {
        return 'pdf\.jpg';
    }

    protected function getExtension(): string
    {
        return 'pdf.jpg';
    }

    public function make(string $path): array
    {
        $output = $this->tmpPath();
        $mimetype = mime_content_type($path);

        system('imagemin '.escapeshellarg($path).' --plugin=jpegtran --plugin=mozjpeg --plugin.mozjpeg.quality=70 > '.escapeshellarg($output));
        system("mv ".escapeshellarg($output)." ".escapeshellarg($path));

        return [
            $path => [$path],
        ];
    }

    private function extractImage(string $pdf): string
    {
        $file = $this->tmpPath().'.'.$this->getExtension();

        exec('convert -density 150 '.escapeshellarg($pdf.'[0]').' -quality 90 '.escapeshellarg($file), $output, $r);

        return $file;
    }

    public function originalSize(): array
    {
        $filename = $this->extractImage($this->media->root());
        $size = getimagesize($filename);
        @unlink($file);

        return $size;
    }

    public function shouldGenerateVersions(): bool
    {
        return true;
    }

    public function resize(string $source, string $destination, Collection $size): void
    {
        $temp = $this->extractImage($source);

        $r = app(ImageManager::class)->make($temp)
            ->fit($size->get('width'), $size->get('height'), fn ($constraint) => $constraint->upsize())
            ->save($temp);

        list($destWidth, $destHeight) = getimagesize($temp);
        $versionFilename = $destination.'/'.$this->versionFilename($source, $destWidth, $destHeight);

        Storage::put($versionFilename, file_get_contents($temp));
    }

}