TagTypeExtensionGist.php

<?php
/**
 * Date: 30-Sep-14
 * Time: 14:15
 */


use Doctrine\ORM\EntityManager;
use \DigitalBundle\Form\DataTransformer\ObjectListToStringTransformer;
use Symfony\Component\Form\AbstractTypeExtension;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\Form\FormView;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;

class TagTypeExtension extends AbstractTypeExtension
{

    private $em;

    function __construct(EntityManager $em)
    {
        $this->em = $em;
    }

    /**
     * Returns the name of the type being extended.
     *
     * @return string The name of the type being extended
     */
    public function getExtendedType()
    {
        return 'entity';
    }

    public function buildView(FormView $view, FormInterface $form, array $options)
    {
        $view->vars['select2'] = $options['select2'];
        $view->vars['max_choice'] = $options['max_choice'];
        $view->vars['allow_new'] = $options['allow_new'];
        $view->vars['selected'] = $options['selected'];
    }

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        if ($options['select2']) {
            $builder->addModelTransformer(new ObjectListToStringTransformer($this->em,
                    [
                        'class' => $options['class'],
                        'property' => $options['property'],
                        'delimiter' => ','
                    ]
                )
            );
            /*        $builder->addEventListener(FormEvents::PRE_SUBMIT,
                            function (FormEvent $event) use ($options) {
                                $optionsTransformer = [
                                    'class' => $options['class'],
                                    'property' => $options['property'],
                                    'delimiter' => ','
                                ];
                                $event->setData((new ObjectListToStringTransformer($this->em, $optionsTransformer
                                    ))->reverseTransform($event->getData()[0]));
                            }
                        );*/
        }
        parent::buildForm($builder, $options);
    }


    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
                'select2' => false,
                'max_choice' => 0,
                'allow_new' => false,
                'selected' => array(),
//                'constraints' => array(new NotBlank(array('message' => '.')))
//                'mapped' => function (Options $options) {
//                    return !$options['select2'];
//                }
            )
        );
    }
}