/app/code/core/Mage/Reports/Model/Mysql4/Event.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_Reports
 * @copyright   Copyright (c) 2010 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

/**
 * Report events resource model
 *
 * @category   Mage
 * @package    Mage_Reports
 * @author     Magento Core Team <core@magentocommerce.com>
 */
class Mage_Reports_Model_Mysql4_Event extends Mage_Core_Model_Mysql4_Abstract
{
    /**
     * Initialize connection
     *
     */
    protected function _construct()
    {
        $this->_init('reports/event', 'event_id');
    }

    /**
     * Update customer type after customer login
     *
     * @param Mage_Reports_Model_Event $model
     * @param int $visitorId
     * @param int $customerId
     * @param array $types
     * @return Mage_Reports_Model_Mysql4_Event
     */
    public function updateCustomerType(Mage_Reports_Model_Event $model, $visitorId, $customerId, $types = array())
    {
        if ($types) {
            $this->_getWriteAdapter()->update($this->getMainTable(),
                array('subject_id' => $customerId, 'subtype' => 0),
                array(
                    $this->_getWriteAdapter()->quoteInto('subject_id=?', $visitorId),
                    $this->_getWriteAdapter()->quoteInto('subtype=?', 1),
                    $this->_getWriteAdapter()->quoteInto('event_type_id IN(?)', $types)
                )
            );
        }
        return $this;
    }

    /**
     * Add events log to a collection
     * The collection id field is used without corellation, so it must be unique.
     * DESC ordering by event will be added to the collection
     *
     * @param Varien_Data_Collection_Db $collection
     * @param int $eventTypeId
     * @param int $eventSubjectId
     * @param int $subtype
     * @param array $skipIds
     */
    public function applyLogToCollection(Varien_Data_Collection_Db $collection, $eventTypeId, $eventSubjectId, $subtype, $skipIds = array())
    {
        $idFieldName = $collection->getResource()->getIdFieldName();

        $derivedSelect = $this->getReadConnection()->select()
            ->from($this->getTable('reports/event'), array('event_id' => new Zend_Db_Expr('MAX(event_id)'), 'object_id'))
            ->where('event_type_id=?', (int)$eventTypeId)
            ->where('subject_id=?',    (int)$eventSubjectId)
            ->where('subtype=?',       (int)$subtype)
            ->where('store_id IN(?)', $this->getCurrentStoreIds())
            ->group('object_id')
        ;
        if ($skipIds) {
            if (!is_array($skipIds)) {
                $skipIds = array((int)$skipIds);
            }
            $derivedSelect->where('object_id NOT IN(?)', $skipIds);
        }

        $collection->getSelect()
            ->joinInner(array('evt' => new Zend_Db_Expr("({$derivedSelect})")), "`{$idFieldName}`=evt.object_id", array())
            ->order('evt.event_id DESC');
    }

    /**
     * Obtain all current store ids, depending on configuration
     *
     * @param array $predefinedStoreIds
     * @return array
     */
    public function getCurrentStoreIds(array $predefinedStoreIds = null)
    {
        $stores = array();
        // get all or specified stores
        if (Mage::app()->getStore()->getId() == 0) {
            if (null !== $predefinedStoreIds) {
                $stores = $predefinedStoreIds;
            }
            else {
                foreach (Mage::app()->getStores() as $store) {
                    $stores[] = $store->getId();
                }
            }
        }
        // get all stores, required by configuration in current store scope
        else {
            switch (Mage::getStoreConfig('catalog/recently_products/scope')) {
                case 'website':
                    $resourceStore = Mage::app()->getStore()->getWebsite()->getStores();
                    break;
                case 'group':
                    $resourceStore = Mage::app()->getStore()->getGroup()->getStores();
                    break;
                default:
                    $resourceStore = array(Mage::app()->getStore());
                    break;
            }

            foreach ($resourceStore as $store) {
                $stores[] = $store->getId();
            }
        }
        foreach ($stores as $key => $store) {
            $stores[$key] = (int)$store;
        }
        return $stores;
    }

    /**
     * Clean report event table
     *
     * @param Mage_Reports_Model_Event $object
     * @return Mage_Reports_Model_Mysql4_Event
     */
    public function clean(Mage_Reports_Model_Event $object)
    {
        while (true) {
            $select = $this->_getReadAdapter()->select()
                ->from(array('event_table' => $this->getMainTable()), array('event_id'))
                ->joinLeft(
                    array('visitor_table' => $this->getTable('log/visitor')),
                    'event_table.subject_id = visitor_table.visitor_id',
                    array())
                ->where('visitor_table.visitor_id IS NULL')
                ->where('event_table.subtype=?', 1)
                ->limit(1000);
            $eventIds = $this->_getReadAdapter()->fetchCol($select);

            if (!$eventIds) {
                break;
            }

            $this->_getWriteAdapter()->delete(
                $this->getMainTable(),
                $this->_getWriteAdapter()->quoteInto('event_id IN(?)', $eventIds)
            );
        }
        return $this;
    }
}