<?php

class Qs_Form_Decorator_Numeric extends Qs_Form_Decorator_ViewHelper
{
    public function initRender()
    {
        /** @var $element Qs_Form_Element_Numeric */
        $element = $this->getElement();
        $options = array(
            'mDec' => $element->getPrecision(),
            'aNeg' => ($element->getNegative()) ? '-' : '',
            'aSep' => $element->getGroup(),
            'aDec' => $element->getDecimal(),
        );
        /** @var $doc Qs_Doc */
        $doc = Zend_Registry::get('doc');
        $doc->addScript('js/jquery-autoNumeric.js')
            ->addInitFunction('$("#' . $element->getId() . '").autoNumeric', array($options));
        return $this;
    }

    /**
     * @param Qs_Form_Element_Numeric $element
     * @return null|string
     */
    public function getValue($element)
    {
        $value = parent::getValue($element);
        if (null !== $value) {
            $value = number_format(
                (float) $value,
                $element->getPrecision(),
                $element->getDecimal(),
                $element->getGroup()
            );
        }
        return $value;
    }

}