UploadedFileTransformer.php

<?php

/*
 * Copyright (C) 2015 IRSTEA
 * All rights reserved.
 */

namespace Irstea\FileUploadBundle\Form\DataTranformer;

use Irstea\FileUploadBundle\Model\FileManagerInterface;
use Irstea\FileUploadBundle\Model\UploadedFileInterface;
use Symfony\Component\Form\DataTransformerInterface;
use Symfony\Component\Form\Exception\TransformationFailedException;
use Traversable;

/**
 * Description of UploadedFileTransformer
 */
class UploadedFileTransformer implements DataTransformerInterface
{
    /**
     *
     * @var boolean
     */
    private $multiple;

    /**
     *
     * @var FileManagerInterface
     */
    private $fileManager;

    public function __construct(FileManagerInterface $fileManager, $multiple = false)
    {
        $this->fileManager = $fileManager;
        $this->multiple = $multiple;
    }

    /**
     * {@inheritdoc}
     */
    public function reverseTransform($value)
    {
        if(!$this->multiple) {
            return $this->reverseTransformFile($value);
        }

        if(empty($value)) {
            return [];
        }

        if(!is_array($value) && !$value instanceof Traversable) {
            throw new TransformationFailedException('Expected an array or a \Traversable.');
        }

        $result = [];
        foreach($value as $identifier) {
            if(null !== $file = $this->reverseTransformFile($identifier)) {
                $result[] = $file;
            }
        }
        return $result;
    }

    /**
     * {@inheritdoc}
     */
    public function transform($value)
    {
        if(!$this->multiple) {