PlatformsCustomersType.php

<?php
// florin 3/13/14 12:12 PM
namespace Wyzbiz\Bundle\MainBundle\Form\Type;

use Sonata\AdminBundle\Form\DataTransformer\ModelsToArrayTransformer;
use Symfony\Component\DependencyInjection\ContainerAwareInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilder;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\FormEvent;
use Symfony\Component\Form\FormEvents;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;
use Wyzbiz\Bundle\MainBundle\Entity\Customer;
use Wyzbiz\Bundle\MainBundle\Entity\InvoicingClient;
use Wyzbiz\Bundle\MainBundle\Form\Transformer\CustomerSearchToIdTransformer;

class PlatformsCustomersType extends AbstractType implements ContainerAwareInterface
{
    /** @var ContainerInterface */
    private $container;

    public function getParent()
    {
        return 'form';
    }

    public function getName()
    {
        return 'wyz_platforms_customers';
    }

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('customer', 'text', ['label' => 'Search Customer'])
            ->add('platform', 'entity', [
                'class' => 'WyzbizMainBundle:Platform',
                'empty_value' => 'All',
                'label' => 'Choose platform'
            ])
            ->add('customers', 'entity', [
                'class' => 'WyzbizMainBundle:Customer',
                'property' => 'username',
                'choices' => [],
                'multiple' => true,
                'expanded' => true,
            ])
        ;

        $formModifier = function(FormInterface $form, InvoicingClient $invoicingClient = null) {
            $customers = $invoicingClient ? $invoicingClient->getCustomers() : [];
            $form->add('customers', 'entity', [
                'class' => 'WyzbizMainBundle:Customer',
                'property' => 'username',
                'choices' => $customers,
                'multiple' => true,
                'expanded' => true,
            ]);
        };

        $builder->addEventListener(FormEvents::PRE_SET_DATA, function(FormEvent $event) use ($formModifier) {
            $form = $event->getForm();
            $parentForm = $form->getParent();
            if (($invoicingClient = $parentForm->getData()) && $invoicingClient->getId()) {
                $formModifier($form, $invoicingClient);
            }
        });

        $builder->get('customers')->addEventListener(FormEvents::POST_SUBMIT, function(FormEvent $event) use ($formModifier) {
            $form = $event->getForm()->getParent();
            $parentForm = $event->getForm()->getParent()->getParent();
            $invoicingClient = $parentForm->getData();
            $formModifier($form, $invoicingClient);
        });

    }

    public function setContainer(ContainerInterface $container = null)
    {
        $this->container = $container;
    }

}