<?php
class rating{

    public $average = 0;
    public $votes;
    public $status;
    public $table;
    private $path;
    
    function __construct($table){
        try{
            $pathinfo = pathinfo(__FILE__);
            $this->path = realpath($pathinfo['dirname']) . "/database/ratings.sqlite";
            $dbh = new PDO("sqlite:$this->path");
            $this->table = $dbh->quote($table);
            // check if table needs to be created
            $table_check = $dbh->query("SELECT * FROM $this->table WHERE id='1'");
            if(!$table_check){
                // create database table
                $dbh->query("CREATE TABLE $this->table (id INTEGER PRIMARY KEY, rating FLOAT(3,2), ip VARCHAR(15))");
                $dbh->query("INSERT INTO $this->table (rating, ip) VALUES (0, 'master')");                
            } else {
                $this->average = $table_check->fetchColumn(1);
            }
            $this->votes = ($dbh->query("SELECT COUNT(*) FROM $this->table")->fetchColumn()-1);
        }catch( PDOException $exception ){
                die($exception->getMessage());
        }
        $dbh = NULL;        
    }

    function set_score($score, $ip){
        try{
            $dbh = new PDO("sqlite:$this->path");
            $voted = $dbh->query("SELECT id FROM $this->table WHERE ip='$ip'");
            if(sizeof($voted->fetchAll())==0){
                
                $dbh->query("INSERT INTO $this->table (rating, ip) VALUES ($score, '$ip')");
                $this->votes++;
                
                //cache average in the master row
                $statement = $dbh->query("SELECT rating FROM $this->table");
                $total = $quantity = 0;
                $row = $statement->fetch(); //skip the master row
                while($row = $statement->fetch()){
                    $total = $total + $row[0];
                    $quantity++;
                }
                $this->average = round((($total*20)/$quantity),0);
                $statement = $dbh->query("UPDATE $this->table SET rating = $this->average WHERE id=1");
                $this->status = '(thanks!)';
            } else {
                $this->status = '(already scored)';
            }
            
        }catch( PDOException $exception ){
                die($exception->getMessage());
        }
        $dbh = NULL;
    }
}

function rating_form($table){
    $ip = $_SERVER["REMOTE_ADDR"];
    if(!isset($table) && isset($_GET['table'])){
        $table = $_GET['table'];
    }
    $rating = new rating($table);
    $status = "<div class='score'>
                <a class='score1' href='?score=1&amp;table=$table&amp;user=$ip'>1</a>
                <a class='score2' href='?score=2&amp;table=$table&amp;user=$ip'>2</a>
                <a class='score3' href='?score=3&amp;table=$table&amp;user=$ip'>3</a>
                <a class='score4' href='?score=4&amp;table=$table&amp;user=$ip'>4</a>
                <a class='score5' href='?score=5&amp;table=$table&amp;user=$ip'>5</a>
            </div>
    ";
    if(isset($_GET['score'])){
        $score = $_GET['score'];
        if(is_numeric($score) && $score <=5 && $score >=1 && ($table==$_GET['table']) && isset($_GET["user"]) && $ip==$_GET["user"]){
            $rating->set_score($score, $ip);
            $status = $rating->status;
        }
    }
    if(!isset($_GET['update'])){ echo "<div class='rating_wrapper'>"; }
    ?>
    <div class="sp_rating">
        <div class="rating">Rating:</div>
        <div class="base"><div class="average" style="width:<?php echo $rating->average; ?>%"><?php echo $rating->average; ?></div></div>
        <div class="votes"><?php echo $rating->votes; ?> votes</div>
        <div class="status">
            <?php echo $status; ?>
        </div>
    </div>
    <?php
    if(!isset($_GET['update'])){ echo "</div>"; }
}

if(isset($_GET['update'])&&isset($_GET['table'])){
    rating_form($_GET['table']);
}

$(document).ready(function() {
    $('.status').prepend("<div class='score_this'>(<a href='#'>score this item</a>)</div>");
    $('.score_this').click(function(){
        $(this).slideUp();
        return false;
    });
    
    $('.score a').click(function() {
        $(this).parent().parent().parent().addClass('scored');
        $.get("rating/rating.php" + $(this).attr("href") +"&update=true", {}, function(data){
            $('.scored').fadeOut("normal",function() {
                $(this).html(data);
                $(this).fadeIn();
                $(this).removeClass('scored');
            });
        });
        return false;
    });
});

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