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<?php
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/**
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* @category WebsiteBaker
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* @package WebsiteBaker_core
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* @author Werner v.d.Decken
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* @copyright WebsiteBaker.org e.V.
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* @link http://websitebaker2.org
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* @license http://www.gnu.org/licenses/gpl.html
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* @version $Id: class.order.php 1502 2011-08-12 18:28:14Z DarkViper $
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* @filesource $HeadURL: svn://isteam.dynxs.de/wb-archiv/branches/2.8.x/wb/framework/class.order.php $
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* Ordering class
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* This class will be used to change the order of an item in a table
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* which contains a special order field (type must be integer)
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*/
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/*******************************************************************************
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* abstract factory for application
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*/
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/* -------------------------------------------------------- */
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// Must include code to stop this file being accessed directly
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if(!defined('WB_PATH')) {
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require_once(dirname(__FILE__).'/globalExceptionHandler.php');
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throw new IllegalFileException();
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}
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/* -------------------------------------------------------- */
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define('ORDERING_CLASS_LOADED', true);
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// Load the other required class files if they are not already loaded
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require_once(WB_PATH."/framework/class.database.php");
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class order {
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const MOVE_UP = 0;
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const MOVE_DOWN = 1;
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private $_Table = '';
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private $_FieldOrder = '';
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private $_FieldId = '';
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private $_FieldGroup = '';
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private $_DB = null;
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/**
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* Constructor
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* @param string $Table
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* @param string $FieldOrder
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* @param string $FieldId
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* @param string $FieldGroup
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* use $GLOBALS['database']
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*/
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public function __construct($Table, $FieldOrder, $FieldId, $FieldGroup) {
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$this->_DB = $GLOBALS['database'];
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$this->_Table = $Table;
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$this->_FieldOrder = $FieldOrder;
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$this->_FieldId = $FieldId;
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$this->_FieldGroup = $FieldGroup;
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}
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/**
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*
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* @param string|int $id
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* @param int $direction
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* @return bool
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*/
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public function move($id, $direction = self::MOVE_UP)
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{
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$retval = false;
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$sql = 'SELECT `'.$this->_FieldOrder.'` `order`, `'.$this->_FieldGroup.'` `group` ';
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$sql .= 'FROM `'.$this->_Table.'` WHERE `'.$this->_FieldId.'`=\''.$id.'\'';
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// get Position and Group for Element to move
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if(($res1 = $this->_DB->query($sql))) {
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if(($rec1 = $res1->fetchRow())) {
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$sql = 'SELECT `'.$this->_FieldId.'` `id`, `'.$this->_FieldOrder.'` `order` ';
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$sql .= 'FROM `'.$this->_Table.'` ';
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$sql .= 'WHERE `'.$this->_FieldGroup.'`=\''.$rec1['group'].'\' ';
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if($direction == self::MOVE_UP) {
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// search for Element with next lower Position
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$sql .= 'AND `'.$this->_FieldOrder.'`<\''.$rec1['order'].'\' ';
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$sql .= 'ORDER BY `'.$this->_FieldOrder.'` DESC';
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}else {
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// search for Element with next higher Position
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$sql .= 'AND `'.$this->_FieldOrder.'`>\''.$rec1['order'].'\' ';
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$sql .= 'ORDER BY `'.$this->_FieldOrder.'` ASC';
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}
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// get Id and Position of the Element to change with
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if(($res2 = $this->_DB->query($sql))) {
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if(($rec2 = $res2->fetchRow())) {
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$sql = 'UPDATE `'.$this->_Table.'` ';
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$sql .= 'SET `'.$this->_FieldOrder.'`=\''.$rec1['order'].'\' ';
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$sql .= 'WHERE `'.$this->_FieldId.'`=\''.$rec2['id'].'\'';
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// update Position number of target
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if($this->_DB->query($sql)) {
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$sql = 'UPDATE `'.$this->_Table.'` ';
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$sql .= 'SET `'.$this->_FieldOrder.'`=\''.$rec2['order'].'\' ';
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$sql .= 'WHERE `'.$this->_FieldId.'`=\''.$id.'\'';
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// update Position number source
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$retval = $this->_DB->query($sql);
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}
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}
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}
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}
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}
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return $retval;
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}
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/**
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* Move a row up
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* @param string|int $id
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* @return bool
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*/
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public function move_up($id) {
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// Get current order
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return $this->move($id, self::MOVE_UP);
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}
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/**
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* Move a row down
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* @param string|int $id
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* @return bool
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*/
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public function move_down($id) {
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// Get current order
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return $this->move($id, self::MOVE_DOWN);
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}
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/**
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* Get next free number for order
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* @param string|int $group
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* @return integer
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*/
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public function get_new($group) {
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// Get last order
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$sql = 'SELECT MAX(`'.$this->_FieldOrder.'`) FROM `'.$this->_Table.'` ';
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$sql .= 'WHERE `'.$this->_FieldGroup.'`=\''.$group.'\' ';
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$max = intval($this->_DB->get_one($sql)) + 1;
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return $max;
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}
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/**
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* Renumbering a group from 1 to n (should be called if a row in the middle has been deleted)
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* @param string|int $group
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* @return bool
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*/
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public function clean($group) {
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// Loop through all records and give new order
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$sql = 'SET @c := 0; ';
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$sql .= 'UPDATE `'.$this->_Table.'` SET `'.$this->_FieldOrder.'`=( SELECT @c := @c + 1 ) ';
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$sql .= 'WHERE `'.$this->_FieldGroup.'`=\''.$group.'\' ';
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$sql .= 'ORDER BY `'.$this->_FieldOrder.'` ASC;';
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return $this->_DB->query($sql);
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}
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} // end of class
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