Laravel Russian Doll Caching

AppServiceProvider.php

<?php

namespace App\Providers;

use Blade;
use Illuminate\Support\ServiceProvider;

class AppServiceProvider extends ServiceProvider
{
    /**
     * Bootstrap any application services.
     *
     * @return void
     */
    public function boot()
    {
        Blade::directive( 'cache', function ( $expression ) {
            return "<?php echo \\App\\Services\\RussianDollCaching::get{$expression}; ?>";
        } );
    }

    /**
     * Register any application services.
     *
     * @return void
     */
    public function register()
    {
        //
    }
}

RussianDollCaching.php

<?php

namespace App\Services;

use Cache;
use InvalidArgumentException;
use Illuminate\Database\Eloquent\Model;

class RussianDollCaching
{
    public static function get( $view, array $data )
    {
        $model = reset( $data );

        if (!$model instanceof Model) {
            throw new InvalidArgumentException;
        }

        $key = join( '/', [ md5( $view ), get_class( $model ), $model->id, $model->updated_at->timestamp ] );

        return Cache::tags( 'views' )->rememberForever( $key, function () use ( $view, $data ) {
            return view( $view, $data )->render();
        } );
    }
}

Created a package for it: https://github.com/rodrigopedra/russian-doll-caching