/app/code/core/Mage/Tag/controllers/IndexController.php

<?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_Tag

 * @copyright   Copyright (c) 2012 Magento Inc. (http://www.magentocommerce.com)

 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)

 */



/**

 * Tag Frontend controller

 *

 * @category   Mage

 * @package    Mage_Tag

 * @author      Magento Core Team <core@magentocommerce.com>

 */



class Mage_Tag_IndexController extends Mage_Core_Controller_Front_Action

{

    /**

     * Saving tag and relation between tag, customer, product and store

     */

    public function saveAction()

    {

        $customerSession = Mage::getSingleton('customer/session');

        if(!$customerSession->authenticate($this)) {

            return;

        }

        $tagName    = (string) $this->getRequest()->getQuery('productTagName');

        $productId  = (int)$this->getRequest()->getParam('product');



        if(strlen($tagName) && $productId) {

            $session = Mage::getSingleton('catalog/session');

            $product = Mage::getModel('catalog/product')

                ->load($productId);

            if(!$product->getId()){

                $session->addError($this->__('Unable to save tag(s).'));

            } else {

                try {

                    $customerId = $customerSession->getCustomerId();

                    $storeId = Mage::app()->getStore()->getId();



                    $tagModel = Mage::getModel('tag/tag');



                    // added tag relation statuses

                    $counter = array(

                        Mage_Tag_Model_Tag::ADD_STATUS_NEW => array(),

                        Mage_Tag_Model_Tag::ADD_STATUS_EXIST => array(),

                        Mage_Tag_Model_Tag::ADD_STATUS_SUCCESS => array(),

                        Mage_Tag_Model_Tag::ADD_STATUS_REJECTED => array()

                    );



                    $tagNamesArr = $this->_cleanTags($this->_extractTags($tagName));

                    foreach ($tagNamesArr as $tagName) {

                        // unset previously added tag data

                        $tagModel->unsetData()

                            ->loadByName($tagName);



                        if (!$tagModel->getId()) {

                            $tagModel->setName($tagName)

                                ->setFirstCustomerId($customerId)

                                ->setFirstStoreId($storeId)

                                ->setStatus($tagModel->getPendingStatus())

                                ->save();

                        }

                        $relationStatus = $tagModel->saveRelation($productId, $customerId, $storeId);

                        $counter[$relationStatus][] = $tagName;

                    }

                    $this->_fillMessageBox($counter);

                } catch (Exception $e) {

                    Mage::logException($e);

                    $session->addError($this->__('Unable to save tag(s).'));

                }

            }

        }

        $this->_redirectReferer();

    }



    /**

     * Checks inputed tags on the correctness of symbols and split string to array of tags

     *

     * @param string $tagNamesInString

     * @return array

     */

    protected function _extractTags($tagNamesInString)

    {

        return explode("\n", preg_replace("/(\'(.*?)\')|(\s+)/i", "$1\n", $tagNamesInString));

    }



    /**

     * Clears the tag from the separating characters.

     *

     * @param array $tagNamesArr

     * @return array

     */

    protected function _cleanTags(array $tagNamesArr)

    {

        foreach( $tagNamesArr as $key => $tagName ) {

            $tagNamesArr[$key] = trim($tagNamesArr[$key], '\'');

            $tagNamesArr[$key] = trim($tagNamesArr[$key]);

            if( $tagNamesArr[$key] == '' ) {

                unset($tagNamesArr[$key]);

            }

        }

        return $tagNamesArr;

    }



    /**

     * Fill Message Box by success and notice messages about results of user actions.

     *

     * @param array $counter

     * @return void

     */

    protected function _fillMessageBox($counter)

    {

        $session = Mage::getSingleton('catalog/session');

        $helper = Mage::helper('core');



        if (count($counter[Mage_Tag_Model_Tag::ADD_STATUS_NEW])) {

            $session->addSuccess(

                $this->__('%s tag(s) have been accepted for moderation.', count($counter[Mage_Tag_Model_Tag::ADD_STATUS_NEW]))

            );

        }



        if (count($counter[Mage_Tag_Model_Tag::ADD_STATUS_EXIST])) {

            foreach ($counter[Mage_Tag_Model_Tag::ADD_STATUS_EXIST] as $tagName) {

                $session->addNotice(

                    $this->__('Tag "%s" has already been added to the product.' , $helper->escapeHtml($tagName))

                );

            }

        }



        if (count($counter[Mage_Tag_Model_Tag::ADD_STATUS_SUCCESS])) {

            foreach ($counter[Mage_Tag_Model_Tag::ADD_STATUS_SUCCESS] as $tagName) {

                $session->addSuccess(

                    $this->__('Tag "%s" has been added to the product.' ,$helper->escapeHtml($tagName))

                );

            }

        }



        if (count($counter[Mage_Tag_Model_Tag::ADD_STATUS_REJECTED])) {

            foreach ($counter[Mage_Tag_Model_Tag::ADD_STATUS_REJECTED] as $tagName) {

                $session->addNotice(

                    $this->__('Tag "%s" has been rejected by administrator.' ,$helper->escapeHtml($tagName))

                );

            }

        }

    }



}