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<?php
/**
* Data Object List Base Class
*
* "data objects by fplanque" :P
*
* 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.' );
/**
* Data Object List Base Class
*
* This is typically an abstract class, useful only when derived.
*
* @package evocore
* @version beta
* @abstract
*/
class DataObjectList
{
/**#@+
* @access private
*/
var $dbtablename;
var $dbprefix;
var $dbIDname;
var $posts_per_page = 15;
/**
* SQL query string
*/
var $request;
/**
* DB Result set (array)
*/
var $result;
/**
* Number of rows in result set. Typically equal to $posts_per_page, once loaded.
*/
var $result_num_rows = 0;
/**
* Object array
*/
var $Obj = array();
/**
* Current object idx in array:
*/
var $current_idx = 0;
/**#@-*/
/**
* Constructor
*
* {@internal DataObjectList::DataObjectList(-) }}
*
* @param string Name of table in database
* @param string Prefix of fields in the table
* @param string Name of the ID field (including prefix)
*/
function DataObjectList( $tablename, $prefix = '', $dbIDname = 'ID' )
{
$this->dbtablename = $tablename;
$this->dbprefix = $prefix;
$this->dbIDname = $dbIDname;
}
/**
* Get nummber of rows available for display
*
* {@internal DataObjectList::get_num_rows(-) }}
*
* @return integer
*/
function get_num_rows()
{
return $this->result_num_rows;
}
/**
* Get next comment in list
*
* {@internal CommentList::get_next(-) }}
*/
function get_next()
{
if( $this->current_idx >= $this->result_num_rows )
{ // No more comment in list
return false;
}
return $this->Obj[$this->current_idx++];
}
/**
* Rewind resultset
*
* {@internal DataObjectList::restart(-) }}
*/
function restart()
{
$this->current_idx = 0;
}
/**
* Template function: display message if list is empty
*
* {@internal DataObjectList::display_if_empty(-) }}
*
* @param string String to display if list is empty
* @return true if empty
*/
function display_if_empty( $message = '' )
{
if( empty($message) )
{ // Default message:
$message = T_('Sorry, there is nothing to display...');
}
if( $this->result_num_rows == 0 )
{
echo $message;
return true;
}
return false;
}
}
?>
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