app/code/core/Mage/Adminhtml/controllers/PollController.php

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<?php
/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@magentocommerce.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magentocommerce.com for more information.
 *
 * @category   Mage
 * @package    Mage_Adminhtml
 * @copyright  Copyright (c) 2008 Irubin Consulting Inc. DBA Varien (http://www.varien.com)
 * @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

/**
 * Adminhtml poll manager controller
 *
 * @category   Mage
 * @package    Mage_Adminhtml
 * @author      Magento Core Team <core@magentocommerce.com>
 */
class Mage_Adminhtml_PollController extends Mage_Adminhtml_Controller_Action
{

    public function indexAction()
    {
        $this->loadLayout();
        $this->_setActiveMenu('cms/poll');
        $this->_addBreadcrumb(Mage::helper('adminhtml')->__('Poll Manager'), Mage::helper('adminhtml')->__('Poll Manager'));

        $this->_addContent($this->getLayout()->createBlock('adminhtml/poll_poll'));
        $this->renderLayout();
    }

    public function editAction()
    {
        $pollId     = $this->getRequest()->getParam('id');
        $pollModel  = Mage::getModel('poll/poll')->load($pollId);

        if ($pollModel->getId() || $pollId == 0) {

            Mage::register('poll_data', $pollModel);

            $this->loadLayout();
            $this->_setActiveMenu('cms/poll');
            $this->_addBreadcrumb(Mage::helper('adminhtml')->__('Poll Manager'), Mage::helper('adminhtml')->__('Poll Manager'), $this->getUrl('*/*/'));
            $this->_addBreadcrumb(Mage::helper('adminhtml')->__('Edit Poll'), Mage::helper('adminhtml')->__('Edit Poll'));

            $this->getLayout()->getBlock('head')->setCanLoadExtJs(true);
            $this->_addContent($this->getLayout()->createBlock('adminhtml/poll_edit'))
                ->_addLeft($this->getLayout()->createBlock('adminhtml/poll_edit_tabs'));

            $this->renderLayout();
        } else {
            Mage::getSingleton('adminhtml/session')->addError(Mage::helper('poll')->__('Poll not exists'));
            $this->_redirect('*/*/');
        }
    }

    public function deleteAction()
    {
        if ($id = $this->getRequest()->getParam('id')) {
            try {
                $model = Mage::getModel('poll/poll');
                $model->setId($id);
                $model->delete();
                Mage::getSingleton('adminhtml/session')->addSuccess(Mage::helper('adminhtml')->__('Poll was successfully deleted'));
                $this->_redirect('*/*/');
                return;
            }
            catch (Exception $e) {
                Mage::getSingleton('adminhtml/session')->addError($e->getMessage());
                $this->_redirect('*/*/edit', array('id' => $this->getRequest()->getParam('id')));
                return;
            }
        }
        Mage::getSingleton('adminhtml/session')->addError(Mage::helper('adminhtml')->__('Unable to find a poll to delete'));
        $this->_redirect('*/*/');
    }

    public function saveAction()
    {
        Mage::getSingleton('adminhtml/session')->addSuccess(Mage::helper('adminhtml')->__('Poll was successfully saved'));
        Mage::getSingleton('adminhtml/session')->setPollData(false);
        $this->_redirect('*/*/');
    }

    public function newAction()
    {
        $this->getRequest()->setParam('id', 0);
        $this->_forward('edit');
    }

    public function validateAction()
    {
        $response = new Varien_Object();
        $response->setError(false);

        if ( $this->getRequest()->getPost() ) {
            try {
                $pollModel = Mage::getModel('poll/poll');

                if( !$this->getRequest()->getParam('id') ) {
                    $pollModel->setDatePosted(now());
                }

                if( $this->getRequest()->getParam('closed') && !$this->getRequest()->getParam('was_closed') ) {
                    $pollModel->setDateClosed(now());
                }

                if( !$this->getRequest()->getParam('closed') ) {
                    $pollModel->setDateClosed(new Zend_Db_Expr('null'));
                }

                $pollModel->setPollTitle($this->getRequest()->getParam('poll_title'))
                      ->setClosed($this->getRequest()->getParam('closed'));

                if( $this->getRequest()->getParam('id') > 0 ) {
                    $pollModel->setId($this->getRequest()->getParam('id'));
                }

                $stores = $this->getRequest()->getParam('store_ids');
                if (!is_array($stores) || count($stores) == 0) {
                    Mage::throwException(Mage::helper('adminhtml')->__('Please, select visible in stores to this poll first'));
                }

                if (is_array($stores)) {
                    $storeIds = array();
                    foreach ($stores as $storeId) {
                        $storeIds[] = $storeId;
                    }
                    $pollModel->setStoreIds($storeIds);
                }

                $answers = $this->getRequest()->getParam('answer');

                if( !is_array($answers) || sizeof($answers) == 0 ) {
                    Mage::throwException(Mage::helper('adminhtml')->__('Please, add a few answers to this poll first'));
                }

                if( is_array($answers) ) {
                    $_titles = array();
                    foreach( $answers as $key => $answer ) {
                        if( in_array($answer['title'], $_titles) ) {
                            Mage::throwException(Mage::helper('adminhtml')->__('Your answers contain duplicates.'));
                        }
                        $_titles[] = $answer['title'];

                        $answerModel = Mage::getModel('poll/poll_answer');
                        if( intval($key) > 0 ) {
                            $answerModel->setId($key);
                        }
                        $answerModel->setAnswerTitle($answer['title'])
                            ->setVotesCount($answer['votes']);

                        $pollModel->addAnswer($answerModel);
                    }
                }

                $pollModel->save();

                $answersDelete = $this->getRequest()->getParam('deleteAnswer');
                if( is_array($answersDelete) ) {
                    foreach( $answersDelete as $answer ) {
                        $answerModel = Mage::getModel('poll/poll_answer');
                        $answerModel->setId($answer)
                            ->delete();
                    }
                }
            }
            catch (Exception $e) {
                Mage::getSingleton('adminhtml/session')->addError($e->getMessage());
                $this->_initLayoutMessages('adminhtml/session');
                $response->setError(true);
                $response->setMessage($this->getLayout()->getMessagesBlock()->getGroupedHtml());
            }
        }
        $this->getResponse()->setBody($response->toJson());
    }

    protected function _isAllowed()
    {
        return Mage::getSingleton('admin/session')->isAllowed('cms/poll');
    }

}

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