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<?php
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// $Id: class.order.php,v 1.2 2005/04/02 06:25:54 rdjurovich Exp $
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/*
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Website Baker Project <http://www.websitebaker.org/>
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Copyright (C) 2004-2005, Ryan Djurovich
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Website Baker is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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Website Baker is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Website Baker; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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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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// Stop this file from being accessed directly
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if(!defined('WB_PATH')) { exit('Direct access to this file is not allowed'); }
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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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// Get the db values
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function order($table, $order_field, $id_field = 'id', $common_field) {
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$this->table = $table;
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$this->order_field = $order_field;
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$this->id_field = $id_field;
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$this->common_field = $common_field;
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}
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// Move a row up
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function move_up($id) {
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global $database;
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// Get current order
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$query_order = "SELECT ".$this->order_field.",".$this->common_field." FROM ".$this->table." WHERE ".$this->id_field." = '$id'";
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$get_order = $database->query($query_order);
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$fetch_order = $get_order->fetchRow();
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$order = $fetch_order[$this->order_field];
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$parent = $fetch_order[$this->common_field];
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// Find out what row is before current one
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$query_previous = "SELECT ".$this->id_field.",".$this->order_field." FROM ".$this->table." WHERE ".$this->order_field." < '$order' AND ".$this->common_field." = '$parent' ORDER BY ".$this->order_field." DESC LIMIT 1";
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$get_previous = $database->query($query_previous);
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if($get_previous->numRows() > 0) {
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// Change the previous row to the current order
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$fetch_previous = $get_previous->fetchRow();
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$previous_id = $fetch_previous[$this->id_field];
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$decremented_order = $fetch_previous[$this->order_field];
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$query = "UPDATE ".$this->table." SET ".$this->order_field." = '$order' WHERE ".$this->id_field." = '$previous_id' LIMIT 1";
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$database->query($query);
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// Change the row we want to the decremented order
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$query = "UPDATE ".$this->table." SET ".$this->order_field." = '$decremented_order' WHERE ".$this->id_field." = '$id' LIMIT 1";
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$database->query($query);
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if($database->is_error()) {
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return false;
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} else {
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return true;
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}
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} else {
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return false;
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}
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}
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// Move a row up
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function move_down($id) {
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global $database;
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// Get current order
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$query_order = "SELECT ".$this->order_field.",".$this->common_field." FROM ".$this->table." WHERE ".$this->id_field." = '$id'";
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$get_order = $database->query($query_order);
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$fetch_order = $get_order->fetchRow();
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$order = $fetch_order[$this->order_field];
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$parent = $fetch_order[$this->common_field];
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// Find out what row is before current one
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$query_next = "SELECT $this->id_field,".$this->order_field." FROM ".$this->table." WHERE ".$this->order_field." > '$order' AND ".$this->common_field." = '$parent' ORDER BY ".$this->order_field." ASC LIMIT 1";
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$get_next = $database->query($query_next);
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if($get_next->numRows() > 0) {
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// Change the previous row to the current order
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$fetch_next = $get_next->fetchRow();
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$next_id = $fetch_next[$this->id_field];
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$incremented_order = $fetch_next[$this->order_field];
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$query = "UPDATE ".$this->table." SET ".$this->order_field." = '$order' WHERE ".$this->id_field." = '$next_id' LIMIT 1";
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$database->query($query);
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// Change the row we want to the decremented order
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$query = "UPDATE ".$this->table." SET ".$this->order_field." = '$incremented_order' WHERE ".$this->id_field." = '$id' LIMIT 1";
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$database->query($query);
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if($database->is_error()) {
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return false;
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} else {
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return true;
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}
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} else {
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return false;
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}
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}
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// Get new number for order
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function get_new($cf_value) {
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global $database;
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$database = new database();
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// Get last order
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$query_last = "SELECT ".$this->order_field." FROM ".$this->table." WHERE ".$this->common_field." = '$cf_value' ORDER BY ".$this->order_field." DESC LIMIT 1";
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$get_last = $database->query($query_last);
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if($get_last->numRows() > 0) {
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$fetch_last = $get_last->fetchRow();
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$last_order = $fetch_last[$this->order_field];
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return $last_order+1;
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} else {
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return 1;
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}
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}
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// Clean ordering (should be called if a row in the middle has been deleted)
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function clean($cf_value) {
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global $database;
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// Loop through all records and give new order
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$query_all = "SELECT * FROM ".$this->table." WHERE ".$this->common_field." = '$cf_value' ORDER BY ".$this->order_field." ASC";
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$get_all = $database->query($query_all);
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if($get_all->numRows() > 0) {
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$count = 1;
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while($row = $get_all->fetchRow()) {
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// Update row with new order
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$database->query("UPDATE ".$this->table." SET ".$this->order_field." = '$count' WHERE ".$this->id_field." = '".$row[$this->id_field]."'");
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$count = $count+1;
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}
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} else {
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return true;
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}
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}
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}
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?>
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