<?php

class App_HtmlBlock_Form_Config extends Qs_Form_Config
{
    protected $_legend = 'Placeholders';

    protected function _initElements()
    {
        /** @var $doc Qs_Doc */
        $doc = Zend_Registry::get('doc');
        if ($doc->hasAuth() && $doc->getAuth()->getSuMode()) {
            $table = new Qs_Db_Table('DPageItemType');
            $sources = $table->get4Select(array('type', 'title'));
            $this->addElement(
                'select',
                'placeholders',
                array('label' => 'Placeholder Data Source', 'multiOptions' => array('' => 'None') + (array) $sources)
            );
        }
        return $this;
    }

    protected function _initPlaceholdersElements($placeholdersSource)
    {
        if (!empty($placeholdersSource)) {

            $separator = (false !== strpos($placeholdersSource, '\\')) ? '\\' : '_';
            $placeholderSourceObj = 'App'. $separator . $placeholdersSource . 'Obj';

            if (class_exists($placeholderSourceObj)) {

                /** @var Qs_Db_Obj $placeholderObj */
                $placeholderObj = new $placeholderSourceObj();

                $placeholders = $placeholderObj->getPlaceholders();
                if (!empty($placeholders)) {
                    $placeholderValues = array();
                    foreach ($placeholders as $name => $description) {
                        $placeholderValues[] = $name . ' - ' . $description;
                    }
                    $this->addElement(
                        'static',
                        'placeholdersValues',
                        array('value' => 'Placeholders: ' . implode(', ', $placeholderValues))
                    );
                }
                
            }

        }

        return $this;
    }

    public function setDefaults(array $defaults = array())
    {
        parent::setDefaults($defaults);
        if (!empty($defaults['config']['placeholders'])) {
            $this->_initPlaceholdersElements($defaults['config']['placeholders']);
        }
        return $this;
    }

    public function renderView(Zend_View_Interface $view = null)
    {
        if ($this->getElements()) {
            parent::renderView($view);
        }
        return false;
    }

    public function render(Zend_View_Interface $view = null)
    {
        $placeholdersContent = '';
        if (null !== ($element = $this->getElement('placeholdersValues'))) {
            $placeholdersContent = $element->render();
            $this->removeElement('placeholdersValues');
        }

        $content = parent::render($view);

        if ($this->getElements()) {
            return $placeholdersContent . $content;
        }
        return $placeholdersContent;
    }
}