<?php

/*
 * This file is part of the Sonata project.
 *
 * (c) Thomas Rabaix <thomas.rabaix@sonata-project.org>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Sonata\BaseApplicationBundle\Form\ValueTransformer;

use Symfony\Component\Form\ValueTransformer\ValueTransformerInterface;
use Symfony\Component\Form\ValueTransformer\TransformationFailedException;
use Symfony\Component\Form\Configurable;
use Symfony\Component\Form\Exception\InvalidPropertyException;
use Symfony\Component\Form\Exception\PropertyAccessDeniedException;

class ArrayToObjectTransformer extends Configurable implements ValueTransformerInterface
{
    protected function configure()
    {
        $this->addRequiredOption('em');
        $this->addRequiredOption('className');

        parent::configure();
    }

    /**
     * @param array $ids
     * @param Collection $collection
     */
    public function reverseTransform($array)
    {
        $class      = $this->getOption('className');
        $metadata   = $this->getOption('em')->getClassMetadata($class);

        // when the object is created the form return an array
        // one the object is persited, the edit $array is the user instance
        if ($array instanceof $class)
        {
            return $array;
        }

        $instance = new $class;

        if (!is_array($array)) {
            
            return $instance;
        }

        $reflClass = $metadata->reflClass;
        foreach ($array as $name => $value) {

            $reflection_property = false;
            // property or association ?
            if (array_key_exists($name, $metadata->fieldMappings)) {

                $property = $metadata->fieldMappings[$name]['fieldName'];
                $reflection_property = $metadata->reflFields[$name];

            } else if (array_key_exists($name, $metadata->associationMappings)) {
                $property = $metadata->associationMappings[$name]['fieldName'];
            } else {
                $property = $name;
            }

            $setter = 'set'.$this->camelize($name);

            if ($reflClass->hasMethod($setter)) {
                if (!$reflClass->getMethod($setter)->isPublic()) {
                    throw new PropertyAccessDeniedException(sprintf('Method "%s()" is not public in class "%s"', $setter, $reflClass->getName()));
                }

                $instance->$setter($value);
            } else if ($reflClass->hasMethod('__set')) {
                // needed to support magic method __set
                $instance->$property = $value;
            } else if ($reflClass->hasProperty($property)) {
                if (!$reflClass->getProperty($property)->isPublic()) {
                    throw new PropertyAccessDeniedException(sprintf('Property "%s" is not public in class "%s". Maybe you should create the method "set%s()"?', $property, $reflClass->getName(), ucfirst($property)));
                }

                $instance->$property = $value;
            } else if ($reflection_property) {
                $reflection_property->setValue($instance, $value);
            }
        }

        return $instance;
    }

    /**
     * @param Collection $value
     */
    public function transform($value)
    {

        return $value;
    }

    /**
     * method taken from PropertyPath
     *
     * @param  $property
     * @return mixed
     */
    protected function camelize($property)
    {
       return preg_replace(array('/(^|_)+(.)/e', '/\.(.)/e'), array("strtoupper('\\2')", "'_'.strtoupper('\\1')"), $property);
    }
}