<?php

namespace App\Cms\Preview;

use Qs_ViewController;
use Zend_Registry;

class View extends Qs_ViewController
{
    protected static $_instance;

    public function exec()
    {
        return $this;
    }

    public static function getInstance()
    {
        if (null === static::$_instance) {
            static::$_instance = new View();
        }
        return static::$_instance;
    }

    public function addItem($item, $groupName = null)
    {
        return $this->_addItem($item, $groupName);
    }

    public static function initAlert()
    {
        /** @var \Qs_Doc $doc */
        $doc = Zend_Registry::get('doc');

        if (!$doc->isPagePreviewMode()) {
            return false;
        }

        /** @var View $view */
        $view = self::getInstance();
        $item['tpl'] = $view->getTemplate('alert.tpl');

        $doc->assign('CSM_PREVIEW_ALERT', $item);

        return true;
    }
}