CRED media handler

public function uploadAttachments($post_id, &$fields, &$files, &$extra_files, $track=false)
    {
        // dependencies
        require_once(ABSPATH.'/wp-admin/includes/file.php');
        //CRED_Loader::loadThe('wp_handle_upload');

        // get ref here
        $form=&$this->friendGet($this->_formBuilder, '&_formData');
        // get ref here
        $out_=&$this->friendGet($this->_formBuilder, '&out_');
        $_form_fields=$out_['form_fields'];
        $zebraForm=$this->friendGet($this->_formBuilder, '_zebraForm');

        // upload data
        $all_ok=true;
        // set featured image only if uploaded
        $fkey='_featured_image';
        $extra_files=array();
        if (
            array_key_exists($fkey, $_form_fields) &&
            array_key_exists($fkey, $_FILES) &&
            isset($_FILES[$fkey]['name']) &&
            ''!=$_FILES[$fkey]['name']
        )
        {
            $upload = wp_handle_upload($_FILES[$fkey], array('test_form'=>false, 'test_upload'=>false));
            if(!isset($upload['error']) && isset($upload['file']))
            {
                $extra_files[$fkey]['wp_upload']=$upload;
                if ($track) $tmp_data=$upload['url'];
                $zebraForm->controls[$_form_fields[$fkey][0]]->set_values(array('value'=>''));
            }
            else
            {
                $all_ok=false;
                if ($track) $tmp_data=$this->getLocalisedMessage('upload_failed');
                $fields[$fkey]='';
                $extra_files[$fkey]['upload_fail']=true;
                $zebraForm->controls[$_form_fields[$fkey][0]]->set_values(array('value'=>''));
                $zebraForm->controls[$_form_fields[$fkey][0]]->addError($upload['error']);
            }
            if ($track)
            {
                $this->trackData(array(__('Featured Image')=>$tmp_data));
                unset($tmp_data);
            }
        }

        foreach ($files as $fkey=>$fdata)
        {
            if ($fdata['repetitive'])
            {
                if ($track) $tmp_data=array();
                //cred_log($fdata);
                foreach ($fdata as $ii=>$fdata2)
                {
                    if (!isset($fdata2['file_data'][$fkey]) || !is_array($fdata2['file_data'][$fkey])) continue;
                    $file_data=$fdata2['file_data'][$fkey];
                    $upload = wp_handle_upload($file_data, array('test_form' => false,'test_upload'=>false));
                    if(!isset($upload['error']) && isset($upload['file']))
                    {
                        $files[$fkey][$ii]['wp_upload']=$upload;
                        $fields[$fkey][$ii]=$upload['url'];
                        if ($track) $tmp_data[]=$upload['url'];
                        $zebraForm->controls[$_form_fields[$files[$fkey]['name_orig']][0]]->set_values(array($ii=>array('value'=>$upload['url'])));
                    }
                    else
                    {
                        $all_ok=false;
                        $files[$fkey]['upload_fail']=true;
                        if ($track) $tmp_data[]=$this->getLocalisedMessage('upload_failed');
                        $fields[$fkey][$ii]='';
                        $files[$fkey][$ii]['upload_fail']=true;
                        $zebraForm->controls[$_form_fields[$files[$fkey]['name_orig']][0]]->set_values(array($ii=>array('value'=>'')));
                        $zebraForm->controls[$_form_fields[$files[$fkey]['name_orig']][0]]->addError(array($ii=>$upload['error']));
                    }
                }
                if ($track)
                {
                    $this->trackData(array($files[$fkey]['label']=>$tmp_data));
                    unset($tmp_data);
                }
            }
            else
            {
                if (!isset($fdata['file_data'][$fkey]) || !is_array($fdata['file_data'][$fkey])) continue;

                $file_data=$fdata['file_data'][$fkey];
                $upload = wp_handle_upload($file_data, array('test_form' => false,'test_upload'=>false));
                if(!isset($upload['error']) && isset($upload['file']))
                {
                    $files[$fkey]['wp_upload']=$upload;
                    $fields[$fkey]=$upload['url'];
                    if ($track) $tmp_data=$upload['url'];
                    $zebraForm->controls[$_form_fields[$files[$fkey]['name_orig']][0]]->set_values(array('value'=>$upload['url']));
                }
                else
                {
                    $all_ok=false;
                    if ($track) $tmp_data=$this->getLocalisedMessage('upload_failed');
                    $fields[$fkey]='';
                    $files[$fkey]['upload_fail']=true;
                    $zebraForm->controls[$_form_fields[$files[$fkey]['name_orig']][0]]->set_values(array('value'=>''));
                    $zebraForm->controls[$_form_fields[$files[$fkey]['name_orig']][0]]->addError($upload['error']);
                }
                if ($track)
                {
                    $this->trackData(array($files[$fkey]['label']=>$tmp_data));
                    unset($tmp_data);
                }
            }
        }
        return $all_ok;
    }