<?php

class Qs_Form_Decorator_TableHeader extends Zend_Form_Decorator_Abstract
{
    public function render($content)
    {
        $form    = $this->getElement();
        if ((!$form instanceof Zend_Form) && (!$form instanceof Zend_Form_DisplayGroup)) {
            return $content;
        }
        $firstSubForm = current($form->getSubForms());
        if (!($firstSubForm instanceof Qs_Form_SubForm)) {
            return $content;
        }
        $elementContent = '';
        $separator      = $this->getSeparator();
        $translator     = $form->getTranslator();
        $items          = array();
        $view           = $form->getView();

        /** @var Qs_Form_Decorator_HtmlTag $th */
        $th = (new Qs_Form_Decorator_HtmlTag())->setElement($this->getElement())->setTag('th');

        /** @var Qs_Form_Decorator_HtmlTag $label */
        $label = (new Qs_Form_Decorator_HtmlTag())->setElement($this->getElement())->setTag('label');

        /** @var Zend_Form_Element $element */
        foreach ($firstSubForm->getElements() as $element) {
            $element->setView($view)->setTranslator($translator);
            if (($decorator = $element->getDecorator('HtmlTag')) && ($class = $decorator->getOption('class'))) {
                $th->setOption('class', $class);
            }
            if ($element->isRequired()) {
                $label->setOption('class', 'required');
            }
            $items[]=  $th->render($label->render($view->escape($element->getLabel())));
        }
        $elementContent .= implode($separator, $items);
        switch ($this->getPlacement()) {
            case self::PREPEND:
                return $elementContent . $separator . $content;
            case self::APPEND:
            default:
                return $content . $separator . $elementContent;
        }
    }
}