/**
     * Upload an image
     *
     * @param $inputFileName string
     * @param $path string
     * @param $data array
     * @return array
     */
    public function uploadImage($inputFileName, $path, &$data, $maxWidth, $maxHeight, $maxFileSize = 50000)
    {
        $helper = Mage::helper('toolbox');
        $io = new Varien_Io_File();
        $io->mkdir($path);

        if (isset($_FILES[$inputFileName]['name']) && (file_exists($_FILES[$inputFileName]['tmp_name']))) {
            try {
                try {
                    if (isset($data[$inputFileName]['value'])) {
                        $file = $path . '/' . $data[$inputFileName]['value'];
                        if (file_exists($file)) {
                            unlink($file);
                        }
                    }

                    // Allowed extensions & mime types
                    $allowedExtensions = array('jpg', 'jpeg', 'gif', 'png');
                    $allowedMimeTypes = array('image/jpeg', 'image/gif', 'image/png');
                    // Upload
                    $uploader = new Varien_File_Uploader($inputFileName);
                    $uploader->setAllowedExtensions($allowedExtensions);
                    $uploader->setAllowRenameFiles(true);
                    // Check mime type
                    if ($uploader->checkMimeType($allowedMimeTypes)) {
                        $upload = new Zend_File_Transfer_Adapter_Http();
                        // Maximum filesize
                        if ($maxFileSize != null) {
                            $upload->addValidator('FilesSize', false, array('max' => $maxFileSize));
                        }
                        // Maximum width
                        if ($maxWidth != null) {
                            $upload->addValidator('ImageSize', false, array('maxwidth' => $maxWidth));
                        }
                        // Maximum height
                        if ($maxHeight != null) {
                            $upload->addValidator('ImageSize', false, array('maxheight' => $maxHeight));
                        }
                        // Valid?
                        if ($upload->isValid($inputFileName)) {
                            $name = $_FILES[$inputFileName]['name'];
                            $uploader->save($path, $name);
                            $data[$inputFileName] = $name;
                            return true;
                        }
                        else {
                            return $upload->getMessages();
                        }
                    }
                    else {
                        return $helper->__('Image type is not allowed (allowed types : jpg, gif, png)');
                    }
                }
                catch (Exception $e) {
                    Mage::log('Error : ' . $e->getMessage() . ' - Line ' . $e->getLine() . ' in ' . $e->getFile(), NULL, 'upload_images.log');
                    return $helper->__('Error during image upload');
                }
            }
            catch (Exception $e) {
                Mage::log('Error : ' . $e->getMessage() . ' - Line ' . $e->getLine() . ' in ' . $e->getFile(), NULL, 'upload_images.log');
                return $helper->__('Error during image upload');
            }
        }
    }