Magento - Add Webform drop down to CMS Pages (Works with VladimirPopov_WebForms)

Adminhtml.php

<?php
// app/code/local/FirstScribe/ModuleName/Model/Observer/Adminhtml.php
/**
 * Observer class. Public method names correspond directly to the event which
 * they observe.
 *
 * @category    FirstScribe
 * @package     FirstScribe_ModuleName
 * @author      ${author}
 * @version     ${date}
 */
class FirstScribe_ModuleName_Model_Observer_Adminhtml
{

    /**
     * @param $observer Varien_Event_Observer
     */
    public function adminhtmlBlockHtmlBefore($observer)
    {
        /* @block Mage_Core_Block_Abstract */
        $block = $observer->getData('block');

        switch ($block->getData('type')) {
            case 'adminhtml/cms_page_edit_tab_content':
                $this->_cmsPageEditFormTabContent($block);
                break;

            default:
                break;
        }

    }

    /**
     * Adds form fields to the "Content" tab of the add/edit cms page.
     *
     * @param Mage_Adminhtml_Block_Cms_Page_Edit_Tab_Content $block
     */
    protected function _cmsPageEditFormTabContent($block)
    {
        /* @var $cmsPage  Mage_Cms_Model_Page */
        /* @var $fieldset Varien_Data_Form_Element_Fieldset */
        /* @var $helper   Mage_Cms_Helper_Data */
        /* @var $webforms VladimirPopov_WebForms_Model_Mysql4_Webforms_Collection */
        /* @var $webform  VladimirPopov_WebForms_Model_Webforms */

        $cmsPage  = Mage::registry('cms_page');
        $fieldset = $block->getForm()->getElement('content_fieldset');
        $helper   = Mage::helper('cms');

        if (   $helper->isModuleEnabled('VladimirPopov_WebForms')
            && $helper->isModuleOutputEnabled('VladimirPopov_WebForms')
        ) {

            // Add "Webform" dropdown
            $webforms = Mage::getResourceModel('webforms/webforms_collection');
            $webforms->setOrder('name', Varien_Data_Collection::SORT_ORDER_ASC);

            $options = array('' => $helper->__('-- Select --'));
            foreach ($webforms as $webform) {
                $options[$webform->getId()] = $webform->getData('name');
            }

            $fieldset->addField(
                'webform_id',
                'select',
                array(
                    'title'   => $helper->__('Webform'),
                    'label'   => $helper->__('Webform'),
                    'options' => $options,
                    'value'   => $cmsPage->getData('webform_id'),
                    'name'    => 'webform_id'
                ),
                'content_heading'
            );
        }

    }

}

config.xml

<!--
app/code/local/FirstScribe/ModuleName/etc/config.xml
-->
<!--
Assumes that your extension already has the following configured:
Models, Blocks, Setup Resources, Frontend Layout XML file
-->
</config>
    <adminhtml>
        <events>
            <adminhtml_block_html_before>
                <observers>
                    <firstscribe_moduleName>
                        <type>singleton</type>
                        <class>firstscribe_moduleName/observer_adminhtml</class>
                        <method>adminhtmlBlockHtmlBefore</method>
                    </firstscribe_moduleName>
                </observers>
            </adminhtml_block_html_before>
        </events>
    </adminhtml>
</config>

moduleName.xml

<?xml version="1.0"?>
<!--
(your extension may have this file in different package and/or theme)
app/design/frontend/base/default/layout/firstscribe/moduleName.xml 
-->
<layout>
    <cms_page>
        <reference name="content">
            <block type="firstscribe_moduleName/cms_page_view_webform" name="cms.page.webforms" />
        </reference>
    </cms_page>
</layout>

upgrade-*-*.php

<?php
// Make sure to name this file approprately according to your extension version.
// app/code/local/FirstScribe/ModuleName/sql/firstscribe_modulename_setup/upgrade-*-*.php
/**
 * Installer Script
 *
 * @category    FirstScribe
 * @package     FirstScribe_ModuleName
 * @author      ${user}
 * @version     ${date}
 */
/* @var $this Mage_Core_Model_Resource_Setup */

$this->startSetup();

$this
    ->getConnection()
    ->addColumn(
        $this->getTable('cms/page'),
        'webform_id',
        array(
            'type'     => Varien_Db_Ddl_Table::TYPE_INTEGER,
            'length'   => 11,
            'nullable' => true,
            'default'  => null,
            'comment'  => 'Webform Id'
        )
    )
;

$this->endSetup();

Webform.php

<?php
/**
 * Adds a webform to the page if the page is assigned one.
 *
 * @category    FirstScribe
 * @package     FirstScribe_ModuleName
 * @author      ${user}
 * @version     ${date}
 */
class FirstScribe_ModuleName_Block_Cms_Page_View_Webform extends Mage_Core_Block_Text
{
  
   /**
     * Set the text for this block.
     */
    protected function _prepareLayout()
    {
        /* @var $block   VladimirPopov_WebForms_Block_Webforms */
        /* @var $cmsPage Mage_Cms_Model_Page */
        /* @var $helper  Mage_Core_Helper_Data */

        parent::_prepareLayout();

        $cmsPage = Mage::getSingleton('cms/page');
        $helper  = Mage::helper('core');

        if (   $cmsPage->getData('webform_id')
            && $helper->isModuleEnabled('VladimirPopov_WebForms')
            && $helper->isModuleOutputEnabled('VladimirPopov_WebForms')
        ) {
            $layout = $this->getLayout();
            $block  = $layout->createBlock(
                'webformsl/webforms',
                'cms.page.webforms.form',
                array(
                    'template'   => 'webforms/default.phtml',
                    'webform_id' => $cmsPage->getData('webform_id')
                )
            );

            if (false !== $block) {
                try {
                    Mage::log($block->toHtml());
                } catch (Exception $e) {
                    Mage::logException($e);
                }
            }

        }
    }

}