Question

I have a slugify method in an Twig Extension which i would like to use in some cases in a controller, f.e with redirects.
Is there an easy way for this?
How could i access functions from Twig Extensions in the controller?

Or do i have to make the slugify method somewere as a helper in order to use it in the code and in twig?

Answer 1

I would advise creating a general service and injecting it to the Twig extension. The extension would act just as a wrapper to the service.

namespace Acme\Bundle\DemoBundle\...;

class MyService
{
    public function myFunc($foo, $bar)
    {
        // some code...
    }

    // additional methods...
}

---

EDIT – as mentioned by Squazic, the first argument must implement Twig_ExtensionInterface. An inelegant solution would be to add methods to MyTwigExtension, that in turn call out respective methods in the service.

namespace Acme\Bundle\DemoBundle\Twig\Extension;

class MyTwigExtension extends \Twig_Extension
{
    protected $service;

    public function __construct(MyService $service)
    {
        $this->service = $service;
    }

    public function getFunctions()
    {
        return array(
            'myTwigFunction' => new \Twig_Function_Method($this, 'myFunc'),
            'mySecondFunc'   => new \Twig_Function_Method($this, 'mySecondFunc'),
        );
    }

    public function myFunc($foo, $bar)
    {
        return $this->service->myFunc($foo, $bar);
    }

    // etc...

}