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<?php
/**
* Item Cache Class
*
* b2evolution - {@link http://b2evolution.net/}
* Released under GNU GPL License - {@link http://b2evolution.net/about/license.html}
* @copyright (c)2003-2005 by Francois PLANQUE - {@link http://fplanque.net/}
*
* @package evocore
*/
if( !defined('DB_USER') ) die( 'Please, do not access this page directly.' );
/**
* Includes:
*/
require_once dirname(__FILE__).'/_class_dataobjectcache.php';
/**
* Item Cache Class
*
* @package evocore
*/
class ItemCache extends DataObjectCache
{
var $urltitle_index = array();
/**
* Constructor
*
* {@internal ItemCache::ItemCache(-) }}
*/
function ItemCache()
{
global $tableposts;
parent::DataObjectCache( 'Item', false, $tableposts, 'post_', 'ID' );
}
/**
* Get an object from cache by its urltitle
*
* Load into cache if necessary
*
* {@internal ItemCache::get_by_urltitle(-) }}
*
* @param string stub of object to load
* @param boolean false if you want to return false on error
*/
function get_by_urltitle( $req_urltitle, $halt_on_error = true )
{
global $DB;
if( !isset( $this->urltitle_index[$req_urltitle] ) )
{ // not yet in cache:
// Load just the requested object:
debug_log( "Loading <strong>$this->objtype($req_urltitle)</strong> into cache" );
$sql = "SELECT *
FROM $this->dbtablename
WHERE post_urltitle = ".$DB->quote($req_urltitle);
$row = $DB->get_row( $sql );
if( empty( $row ) )
{ // Requested object does not exist
if( $halt_on_error ) die( "Requested $this->objtype does not exist!" );
// put into index:
$this->urltitle_index[$req_urltitle] = false;
return false;
}
$dbIDname = $this->dbIDname;
$objtype = $this->objtype;
$this->cache[ $row->$dbIDname ] = new $objtype( $row ); // COPY!
// put into index:
$this->urltitle_index[$req_urltitle] = & $this->cache[ $row->$dbIDname ];
}
else
{
debug_log( "Retrieving <strong>$this->objtype($req_urltitle)</strong> from cache" );
}
return $this->urltitle_index[$req_urltitle];
}
/**
* Load a list of item referenced by their urltitle into the cache
*
* {@internal DataObjectCache::load_urltitle_array(-) }}
*
* @param array of urltitles of Items to load
*/
function load_urltitle_array( $req_array )
{
global $DB;
$req_list = "'".implode( "','", $req_array)."'";
debug_log( "Loading <strong>$this->objtype($req_list)</strong> into cache" );
$sql = "SELECT * FROM $this->dbtablename WHERE post_urltitle IN ( $req_list )";
$rows = $DB->get_results( $sql );
$dbIDname = $this->dbIDname;
$objtype = $this->objtype;
if( count($rows) ) foreach( $rows as $row )
{
$this->cache[ $row->$dbIDname ] = new $objtype( $row ); // COPY!
// $obj = $this->cache[ $row->$dbIDname ];
// $obj->disp( 'name' );
// put into index:
$this->urltitle_index[$row->post_urltitle] = & $this->cache[ $row->$dbIDname ];
debug_log( "Cached <strong>$this->objtype($row->post_urltitle)</strong>" );
}
// Set cache for non found objects:
foreach( $req_array as $urltitle )
{
if( !isset( $this->urltitle_index[$urltitle] ) )
{ // not yet in cache:
$this->urltitle_index[$urltitle] = false; // Remember it doesn't exist in DB either
debug_log( "Cached <strong>$this->objtype($urltitle)</strong> as NON EXISTENT" );
}
}
}
}
?>
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