pixelfed/app/Transformer/Api/MediaTransformer.php

<?php

namespace App\Transformer\Api;

use App\Media;
use League\Fractal;
use League\Fractal\Serializer\ArraySerializer;

class MediaTransformer extends Fractal\TransformerAbstract
{
    public function transform(Media $media)
    {
        return [
            'id'  => $media->id,
            'type' => 'image',
            'url' => $media->url(),
            'remote_url' => null,
            'preview_url' => $media->thumbnailUrl(),
            'text_url' => null,
            'meta' => null,
            'description' => null
        ];
    }
}