private function getStoredPicture($date)
    {
        $paths = $this->getPicturePaths($date);
        $picture = json_decode(file_get_contents($paths['json_path']), true);

        if (file_exists($paths['thumbnail_path'])) {
            $picture['thumbnail_url'] = $paths['thumbnail_url'];
        }

        return $picture;
    }