<?php
/*************************
  Coppermine Photo Gallery
  ************************
  Copyright (c) 2003-2012 Coppermine Dev Team
  v1.0 originally written by Gregory Demar

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License version 3
  as published by the Free Software Foundation.

  ********************************************
  Coppermine version: 1.5.18
  $HeadURL: https://coppermine.svn.sourceforge.net/svnroot/coppermine/trunk/cpg1.5.x/ratepic.php $
  $Revision: 8304 $
**********************************************/

define('IN_COPPERMINE', true);
define('RATEPIC_PHP', true);

require('include/init.inc.php');

header("Content-Type: text/plain");

// Check if required parameters are present
if (!$superCage->get->keyExists('pic') || !$superCage->get->keyExists('rate')) {

    //send back voting failure to ajax request
    $send_back = array(
        'status' => 'error',
        'msg'    => $lang_errors['param_missing'],
    );
    
    echo json_encode($send_back);
    exit;
}

$rating_stars_amount = ($CONFIG['old_style_rating']) ? 5 : $CONFIG['rating_stars_amount'];

$pic  = $superCage->get->getInt('pic');
$rate = $superCage->get->getInt('rate');

$rate = min($rate, $rating_stars_amount);
$rate = max($rate, 0);

// Retrieve picture/album information & check if user can rate picture
$sql = "SELECT a.votes as votes_allowed, p.votes as votes, pic_rating, owner_id FROM {$CONFIG['TABLE_PICTURES']} AS p INNER JOIN {$CONFIG['TABLE_ALBUMS']} AS a ON p.aid = a.aid WHERE pid = $pic";
$result = cpg_db_query($sql);

if (!mysql_num_rows($result)) {

    //send back voting failure to ajax request
    $send_back = array(
        'status' => 'error',
        'msg'    => $lang_errors['non_exist_ap'],
    );
    
    echo json_encode($send_back);
    exit;
}
//Check if the form token is valid
if(!checkFormToken()){
    //send back voting failure to ajax request
    $send_back = array(
        'status' => 'error',
        'msg'    => $lang_errors['invalid_form_token'],
    );
    
    echo json_encode($send_back);
    exit;
}

$row = mysql_fetch_assoc($result);
mysql_free_result($result);

if (!USER_CAN_RATE_PICTURES || $row['votes_allowed'] == 'NO') {
 
    //send back voting failure to ajax request
    $send_back = array(
        'status' => 'error',
        'msg'    => $lang_errors['perm_denied'],
    );
    
    echo json_encode($send_back);
    exit;
}

// Clean votes older votes
$clean_before = time() - $CONFIG['keep_votes_time'] * 86400;
$sql = "DELETE FROM {$CONFIG['TABLE_VOTES']} WHERE vote_time < $clean_before";
$result = cpg_db_query($sql);

// Check if user already rated this picture
$user_md5_id = USER_ID ? md5(USER_ID) : $USER['ID'];
$sql = "SELECT null FROM {$CONFIG['TABLE_VOTES']} WHERE pic_id = $pic AND user_md5_id = '$user_md5_id'";
$result = cpg_db_query($sql);

if (mysql_num_rows($result)) { 

    // user has already rated this file
    $send_back = array(
        'status' => 'error',
        'msg'    => $lang_rate_pic_php['already_rated'],
        'a'      => $USER,
    );
    
    echo json_encode($send_back);
    exit;
}

mysql_free_result($result);

//Test for Self-Rating
if (!empty($user_id) && $user_id == $row['owner_id'] && ($CONFIG['rate_own_files'] == 0 || $CONFIG['rate_own_files'] == 2 && !USER_IS_ADMIN)) {

    $send_back = array(
        'status' => 'error',
        'msg'    => $lang_rate_pic_php['forbidden'],
    );
    
    echo json_encode($send_back);
    exit;
}

// Update picture rating
$new_rating = round(($row['votes'] * $row['pic_rating'] + ($rate * (5 / $rating_stars_amount)) * 2000) / ($row['votes'] + 1));
$sql = "UPDATE {$CONFIG['TABLE_PICTURES']} SET pic_rating = $new_rating, votes = votes + 1 WHERE pid = $pic";
$result = cpg_db_query($sql);

// Update the votes table
$sql = "INSERT INTO {$CONFIG['TABLE_VOTES']} (pic_id, user_md5_id, vote_time) VALUES ($pic, '$user_md5_id', ".time().")";
$result = cpg_db_query($sql);

//
// Code to record the details of votes for the picture if the option is set in CONFIG
//
if ($CONFIG['vote_details']) {

    // Get the details of user browser, IP, OS, etc
    $client_details = cpg_determine_client();

    // Code to write the user id if a user is logged in
    $voteUserId = USER_ID;

    $referer = urlencode($superCage->post->getEscaped('HTTP_REFERER'));

    // Insert the record in database
    $query = "INSERT INTO {$CONFIG['TABLE_VOTE_STATS']} (pid, rating, Ip, sdate, referer, browser, os, uid) VALUES ($pic, $rate, '$raw_ip', ".time().", '$referer', '{$client_details['browser']}', '{$client_details['os']}', $voteUserId)";
    cpg_db_query($query);
}

$new_rating = round(($new_rating / 2000) / (5 / $rating_stars_amount), 1);
$new_rating_text = $lang_rate_pic_php['rate_ok'] . ' ' . sprintf($lang_rate_pic['rating'], $new_rating, $rating_stars_amount, $row['votes'] + 1);

$send_back = array(
    'status'          => 'success',
    'msg'             => $lang_rate_pic_php['rate_ok'],
    'new_rating_text' => $new_rating_text,
    'new_rating'      => round($new_rating, 0),
);

echo json_encode($send_back);

?>