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<?php
/*
* Nucleus: PHP/MySQL Weblog CMS (http://nucleuscms.org/)
* Copyright (C) 2002-2005 The Nucleus Group
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* (see nucleus/documentation/index.html#license for more info)
*/
/**
* Class representing the karma votes for a certain item
*
* @license http://nucleuscms.org/license.txt GNU General Public License
* @copyright Copyright (C) 2002-2005 The Nucleus Group
* @version $Id: KARMA.php,v 1.8.2.1 2005/08/15 10:50:12 dekarma Exp $
*/
class KARMA {
// id of item about which this object contains information
var $itemid;
// indicates if the karma vote info has already been intialized from the DB
var $inforead;
// amount of positive/negative votes
var $karmapos;
var $karmaneg;
function KARMA($itemid, $initpos = 0, $initneg = 0, $initread = 0) {
// itemid
$this->itemid = intval($itemid);
// have we read the karma info yet?
$this->inforead = intval($initread);
// number of positive and negative votes
$this->karmapos = intval($initpos);
$this->karmaneg = intval($initneg);
}
function getNbPosVotes() {
if (!$this->inforead) $this->readFromDatabase();
return $this->karmapos;
}
function getNbNegVotes() {
if (!$this->inforead) $this->readFromDatabase();
return $this->karmaneg;
}
function getNbOfVotes() {
if (!$this->inforead) $this->readFromDatabase();
return ($this->karmapos + $this->karmaneg);
}
function getTotalScore() {
if (!$this->inforead) $this->readFromDatabase();
return ($this->karmapos - $this->karmaneg);
}
function setNbPosVotes($val) {
$this->karmapos = intval($val);
}
function setNbNegVotes($val) {
$this->karmaneg = intval($val);
}
// adds a positive vote
function votePositive() {
$newKarma = $this->getNbPosVotes() + 1;
$this->setNbPosVotes($newKarma);
$this->writeToDatabase();
$this->saveIP();
}
// adds a negative vote
function voteNegative() {
$newKarma = $this->getNbNegVotes() + 1;
$this->setNbNegVotes($newKarma);
$this->writeToDatabase();
$this->saveIP();
}
// these methods shouldn't be called directly
function readFromDatabase() {
$query = 'SELECT ikarmapos, ikarmaneg FROM '.sql_table('item').' WHERE inumber=' . $this->itemid;
$res = sql_query($query);
$obj = mysql_fetch_object($res);
$this->karmapos = $obj->ikarmapos;
$this->karmaneg = $obj->ikarmaneg;
$this->inforead = 1;
}
function writeToDatabase() {
$query = 'UPDATE '.sql_table('item').' SET ikarmapos=' . $this->karmapos . ', ikarmaneg='.$this->karmaneg.' WHERE inumber=' . $this->itemid;
sql_query($query);
}
// checks if a vote is still allowed for an IP
function isVoteAllowed($ip) {
$query = 'SELECT * FROM '.sql_table('karma')." WHERE itemid=$this->itemid and ip='".addslashes($ip)."'";
$res = sql_query($query);
return (mysql_num_rows($res) == 0);
}
// save IP in database so no multiple votes are possible
function saveIP() {
$query = 'INSERT INTO '.sql_table('karma').' (itemid, ip) VALUES ('.$this->itemid.",'".addslashes(serverVar('REMOTE_ADDR'))."')";
sql_query($query);
}
}
?>
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