prestashop add tips for error mesage

[Isoo]

my prestashop module return some error messages and i get more questions about solve this errors i want add some tips for this errors. when insert new product to database this code line return error mesage for example "name is empty"

$lang_field_error = $productObj->validateFieldsLang(self::UNFRIENDLY_ERROR, true)

and i show errror msg look like this

$error_tmp = ($field_error !== true ? $field_error : '') . (isset($lang_field_error) && $lang_field_error !== true ? $lang_field_error : '') . Db::getInstance()->getMsgError();
                if ($error_tmp != '') {
                    $this->error_msg[] = sprintf(
                        Tools::displayError('Product (ID: %1$s) cannot be saved. %2$s'),
                        (isset($product['id_product']) && !empty($product['id_product'])) ? Tools::safeOutput(
                            $product['id_product']
                        ) : 'No ID',
                        $error_tmp
                    );
                }

 

$productObj->validateFieldsLang() this method comes from ObjectModel class

public function validateFieldsLang($die = true, $error_return = false)
{
    foreach ($this->def['fields'] as $field => $data) {
        if (empty($data['lang'])) {
            continue;
        }

        $values = $this->$field;

        // If the object has not been loaded in multilanguage, then the value is the one for the current language of the object
        if (!is_array($values)) {
            $values = array($this->id_lang => $values);
        }

        // The value for the default must always be set, so we put an empty string if it does not exists
        if (!isset($values[Configuration::get('PS_LANG_DEFAULT')])) {
            $values[Configuration::get('PS_LANG_DEFAULT')] = '';
        }

        foreach ($values as $id_lang => $value) {
            if (is_array($this->update_fields) && empty($this->update_fields[$field][$id_lang])) {
                continue;
            }

            $message = $this->validateField($field, $value, $id_lang);
            if ($message !== true) {
                if ($die) {
                    throw new PrestaShopException($message);
                }
                return $error_return ? $message : false;
            }
        }
    }

    return true;
}

and return error msg for display, for example if error msg is "the name field is empty" i want add error tip look like "you products name cannot be empty "

 

I must catch errors kind,(not from string) Can anyone Help me?

Edited October 25, 2016 by Isoo (see edit history)