[Summary view] [Print] [Text view]

   1  <?php
   2  /*
   3   * Nucleus: PHP/MySQL Weblog CMS (http://nucleuscms.org/)
   4   * Copyright (C) 2002-2007 The Nucleus Group
   5   *
   6   * This program is free software; you can redistribute it and/or
   7   * modify it under the terms of the GNU General Public License
   8   * as published by the Free Software Foundation; either version 2
   9   * of the License, or (at your option) any later version.
  10   * (see nucleus/documentation/index.html#license for more info)
  11   */
  12  /**
  13   * Class representing the karma votes for a certain item
  14   *
  15   * @license http://nucleuscms.org/license.txt GNU General Public License
  16   * @copyright Copyright (C) 2002-2007 The Nucleus Group
  17   * @version $Id: KARMA.php 1116 2007-02-03 08:24:29Z kimitake $
  18   */
  19  class KARMA {
  20  
  21      // id of item about which this object contains information
  22      var $itemid;
  23  
  24      // indicates if the karma vote info has already been intialized from the DB
  25      var $inforead;
  26  
  27      // amount of positive/negative votes
  28      var $karmapos;
  29      var $karmaneg;
  30  
  31  	function KARMA($itemid, $initpos = 0, $initneg = 0, $initread = 0) {
  32          // itemid
  33          $this->itemid = intval($itemid);
  34  
  35          // have we read the karma info yet?
  36          $this->inforead = intval($initread);
  37  
  38          // number of positive and negative votes
  39          $this->karmapos = intval($initpos);
  40          $this->karmaneg = intval($initneg);
  41      }
  42  
  43  	function getNbPosVotes() {
  44          if (!$this->inforead) $this->readFromDatabase();
  45          return $this->karmapos;
  46      }
  47  	function getNbNegVotes() {
  48          if (!$this->inforead) $this->readFromDatabase();
  49          return $this->karmaneg;
  50      }
  51  	function getNbOfVotes() {
  52          if (!$this->inforead) $this->readFromDatabase();
  53          return ($this->karmapos + $this->karmaneg);
  54      }
  55  	function getTotalScore() {
  56          if (!$this->inforead) $this->readFromDatabase();
  57          return ($this->karmapos - $this->karmaneg);
  58      }
  59  
  60  	function setNbPosVotes($val) {
  61          $this->karmapos = intval($val);
  62      }
  63  	function setNbNegVotes($val) {
  64          $this->karmaneg = intval($val);
  65      }
  66  
  67  
  68      // adds a positive vote
  69  	function votePositive() {
  70          $newKarma = $this->getNbPosVotes() + 1;
  71          $this->setNbPosVotes($newKarma);
  72          $this->writeToDatabase();
  73          $this->saveIP();
  74      }
  75  
  76      // adds a negative vote
  77  	function voteNegative() {
  78          $newKarma = $this->getNbNegVotes() + 1;
  79          $this->setNbNegVotes($newKarma);
  80          $this->writeToDatabase();
  81          $this->saveIP();
  82      }
  83  
  84  
  85  
  86      // these methods shouldn't be called directly
  87  	function readFromDatabase() {
  88          $query = 'SELECT ikarmapos, ikarmaneg FROM '.sql_table('item').' WHERE inumber=' . $this->itemid;
  89          $res = sql_query($query);
  90          $obj = mysql_fetch_object($res);
  91  
  92          $this->karmapos = $obj->ikarmapos;
  93          $this->karmaneg = $obj->ikarmaneg;
  94          $this->inforead = 1;
  95      }
  96  
  97  
  98  	function writeToDatabase() {
  99          $query = 'UPDATE '.sql_table('item').' SET ikarmapos=' . $this->karmapos . ', ikarmaneg='.$this->karmaneg.' WHERE inumber=' . $this->itemid;
 100          sql_query($query);
 101      }
 102  
 103      // checks if a vote is still allowed for an IP
 104  	function isVoteAllowed($ip) {
 105          $query = 'SELECT * FROM '.sql_table('karma')." WHERE itemid=$this->itemid and ip='".addslashes($ip)."'";
 106          $res = sql_query($query);
 107          return (mysql_num_rows($res) == 0);
 108      }
 109  
 110      // save IP in database so no multiple votes are possible
 111  	function saveIP() {
 112          $query = 'INSERT INTO '.sql_table('karma').' (itemid, ip) VALUES ('.$this->itemid.",'".addslashes(serverVar('REMOTE_ADDR'))."')";
 113          sql_query($query);
 114      }
 115  }
 116  
 117  ?>