mirror of
https://github.com/WhatCD/Gazelle.git
synced 2024-12-13 10:56:26 +00:00
296 lines
9.8 KiB
PHP
296 lines
9.8 KiB
PHP
<?
|
|
class Votes {
|
|
/**
|
|
* Generate voting links for torrent pages, etc.
|
|
* @global $LoggedUser
|
|
* @param $GroupID
|
|
* @param $Vote The pre-existing vote, if it exists 'Up'|'Down'
|
|
*/
|
|
public static function vote_link($GroupID, $Vote = '') {
|
|
global $LoggedUser;
|
|
if (!$LoggedUser['NoVoteLinks'] && check_perms('site_album_votes')) { ?>
|
|
<span class="votespan brackets" style="white-space: nowrap">
|
|
Vote:
|
|
<a href="#" onclick="UpVoteGroup(<?=$GroupID?>, '<?=$LoggedUser['AuthKey']?>'); return false;" class="small_upvote vote_link_<?=$GroupID?><?=(!empty($Vote)?' hidden':'')?>" title="Upvote">↑</a>
|
|
<span class="voted_type small_upvoted voted_up_<?=$GroupID?><?=(($Vote == 'Down' || empty($Vote))?' hidden':'')?>" title="Upvoted">↑</span>
|
|
<a href="#" onclick="DownVoteGroup(<?=$GroupID?>, '<?=$LoggedUser['AuthKey']?>'); return false;" class="small_downvote vote_link_<?=$GroupID?><?=(!empty($Vote)?' hidden':'')?>" title="Downvote">↓</a>
|
|
<span class="voted_type small_downvoted voted_down_<?=$GroupID?><?=(($Vote == 'Up'|| empty($Vote))?' hidden':'')?>" title="Downvoted">↓</span>
|
|
<a href="#" onclick="UnvoteGroup(<?=$GroupID?>, '<?=$LoggedUser['AuthKey']?>'); return false;" class="small_clearvote vote_clear_<?=$GroupID?><?=(empty($Vote)?' hidden':'')?>" title="Clear your vote">x</a>
|
|
</span>
|
|
<? }
|
|
}
|
|
|
|
/**
|
|
* Returns an array with User Vote data: GroupID and vote type
|
|
* @global CACHE $Cache
|
|
* @global DB_MYSQL $DB
|
|
* @param string|int $UserID
|
|
* @return array GroupID=>(GroupID, 'Up'|'Down')
|
|
*/
|
|
public static function get_user_votes($UserID) {
|
|
global $DB, $Cache;
|
|
|
|
if ((int)$UserID == 0) {
|
|
return array();
|
|
}
|
|
|
|
$UserVotes = $Cache->get_value('voted_albums_'.$UserID);
|
|
if ($UserVotes === false) {
|
|
$DB->query('SELECT GroupID, Type FROM users_votes WHERE UserID='.$UserID);
|
|
$UserVotes = $DB->to_array('GroupID', MYSQL_ASSOC, false);
|
|
$Cache->cache_value('voted_albums_'.$UserID, $UserVotes);
|
|
}
|
|
return $UserVotes;
|
|
}
|
|
|
|
/**
|
|
* Returns an array with torrent group vote data
|
|
* @global CACHE $Cache
|
|
* @global DB_MYSQL $DB
|
|
* @param string|int $GroupID
|
|
* @return array (Upvotes, Total Votes)
|
|
*/
|
|
public static function get_group_votes($GroupID) {
|
|
global $DB, $Cache;
|
|
|
|
$GroupVotes = $Cache->get_value('votes_'.$GroupID);
|
|
if ($GroupVotes === false) {
|
|
$DB->query("SELECT Ups AS Ups, Total AS Total FROM torrents_votes WHERE GroupID=$GroupID");
|
|
if ($DB->record_count() == 0) {
|
|
$GroupVotes = array('Ups'=>0, 'Total'=>0);
|
|
} else {
|
|
$GroupVotes = $DB->next_record(MYSQLI_ASSOC, false);
|
|
}
|
|
$Cache->cache_value('votes_'.$GroupID, $GroupVotes, 259200);
|
|
}
|
|
return $GroupVotes;
|
|
}
|
|
|
|
/**
|
|
* Computes the inverse normal CDF of a p-value
|
|
* @param float $GroupID
|
|
* @return float Inverse Normal CDF
|
|
*/
|
|
private function inverse_ncdf($p) {
|
|
/***************************************************************************
|
|
* inverse_ncdf.php
|
|
* -------------------
|
|
* begin : Friday, January 16, 2004
|
|
* copyright : (C) 2004 Michael Nickerson
|
|
* email : nickersonm@yahoo.com
|
|
*
|
|
***************************************************************************/
|
|
|
|
//Inverse ncdf approximation by Peter John Acklam, implementation adapted to
|
|
//PHP by Michael Nickerson, using Dr. Thomas Ziegler's C implementation as
|
|
//a guide. http://home.online.no/~pjacklam/notes/invnorm/index.html
|
|
//I have not checked the accuracy of this implementation. Be aware that PHP
|
|
//will truncate the coeficcients to 14 digits.
|
|
|
|
//You have permission to use and distribute this function freely for
|
|
//whatever purpose you want, but please show common courtesy and give credit
|
|
//where credit is due.
|
|
|
|
//Input paramater is $p - probability - where 0 < p < 1.
|
|
|
|
//Coefficients in rational approximations
|
|
$a = array(1 => -3.969683028665376e+01, 2 => 2.209460984245205e+02,
|
|
3 => -2.759285104469687e+02, 4 => 1.383577518672690e+02,
|
|
5 => -3.066479806614716e+01, 6 => 2.506628277459239e+00);
|
|
|
|
$b = array(1 => -5.447609879822406e+01, 2 => 1.615858368580409e+02,
|
|
3 => -1.556989798598866e+02, 4 => 6.680131188771972e+01,
|
|
5 => -1.328068155288572e+01);
|
|
|
|
$c = array(1 => -7.784894002430293e-03, 2 => -3.223964580411365e-01,
|
|
3 => -2.400758277161838e+00, 4 => -2.549732539343734e+00,
|
|
5 => 4.374664141464968e+00, 6 => 2.938163982698783e+00);
|
|
|
|
$d = array(1 => 7.784695709041462e-03, 2 => 3.224671290700398e-01,
|
|
3 => 2.445134137142996e+00, 4 => 3.754408661907416e+00);
|
|
|
|
//Define break-points.
|
|
$p_low = 0.02425; //Use lower region approx. below this
|
|
$p_high = 1 - $p_low; //Use upper region approx. above this
|
|
|
|
//Define/list variables (doesn't really need a definition)
|
|
//$p (probability), $sigma (std. deviation), and $mu (mean) are user inputs
|
|
$q = NULL; $x = NULL; $y = NULL; $r = NULL;
|
|
|
|
//Rational approximation for lower region.
|
|
if (0 < $p && $p < $p_low) {
|
|
$q = sqrt(-2 * log($p));
|
|
$x = ((((($c[1] * $q + $c[2]) * $q + $c[3]) * $q + $c[4]) * $q + $c[5]) *
|
|
$q + $c[6]) / (((($d[1] * $q + $d[2]) * $q + $d[3]) * $q + $d[4]) *
|
|
$q + 1);
|
|
}
|
|
|
|
//Rational approximation for central region.
|
|
elseif ($p_low <= $p && $p <= $p_high) {
|
|
$q = $p - 0.5;
|
|
$r = $q * $q;
|
|
$x = ((((($a[1] * $r + $a[2]) * $r + $a[3]) * $r + $a[4]) * $r + $a[5]) *
|
|
$r + $a[6]) * $q / ((((($b[1] * $r + $b[2]) * $r + $b[3]) * $r +
|
|
$b[4]) * $r + $b[5]) * $r + 1);
|
|
}
|
|
|
|
//Rational approximation for upper region.
|
|
elseif ($p_high < $p && $p < 1) {
|
|
$q = sqrt(-2 * log(1 - $p));
|
|
$x = -((((($c[1] * $q + $c[2]) * $q + $c[3]) * $q + $c[4]) * $q +
|
|
$c[5]) * $q + $c[6]) / (((($d[1] * $q + $d[2]) * $q + $d[3]) *
|
|
$q + $d[4]) * $q + 1);
|
|
}
|
|
|
|
//If 0 < p < 1, return a null value
|
|
else {
|
|
$x = NULL;
|
|
}
|
|
|
|
return $x;
|
|
//END inverse ncdf implementation.
|
|
}
|
|
|
|
/**
|
|
* Implementation of the algorithm described at http://www.evanmiller.org/how-not-to-sort-by-average-rating.html
|
|
* @param int $Ups Number of upvotes
|
|
* @param int $Total Number of total votes
|
|
* @return float Ranking score
|
|
*/
|
|
public static function binomial_score($Ups, $Total) {
|
|
// Confidence level for binomial scoring (p-value .95)
|
|
//define(Z_VAL, 1.645211440143815);
|
|
// Confidence level for binomial scoring (p-value .90)
|
|
define(Z_VAL, 1.281728756502709);
|
|
|
|
if (($Total <= 0) || ($Ups < 0)) {
|
|
return 0;
|
|
}
|
|
$phat = $Ups/$Total;
|
|
return ($phat + Z_VAL*Z_VAL/(2*$Total) - Z_VAL*sqrt(($phat*(1-$phat)+Z_VAL*Z_VAL/(4*$Total))/$Total))/(1+Z_VAL*Z_VAL/$Total);
|
|
}
|
|
|
|
/**
|
|
* Gets where this album ranks overall, for its year, and for its decade. This is really just a wrapper.
|
|
* @param int $GroupID GroupID of the album
|
|
* @param int $Year Year it was released
|
|
* @return array ('overall'=><overall rank>, 'year'=><rank for its year>, 'decade'=><rank for its decade>)
|
|
*/
|
|
public static function get_ranking($GroupID, $Year) {
|
|
$GroupID = (int)$GroupID;
|
|
$Year = (int)$Year;
|
|
if ($GroupID <= 0 || $Year <= 0) {
|
|
return false;
|
|
}
|
|
|
|
return array('overall'=>Votes::get_rank_all($GroupID),
|
|
'year' =>Votes::get_rank_year($GroupID, $Year),
|
|
'decade' =>Votes::get_rank_decade($GroupID, $Year));
|
|
}
|
|
|
|
/**
|
|
* Gets where this album ranks overall.
|
|
* @global CACHE $Cache
|
|
* @global DB_MYSQL $DB
|
|
* @param int $GroupID GroupID of the album
|
|
* @return int Rank
|
|
*/
|
|
public static function get_rank_all($GroupID) {
|
|
global $Cache, $DB;
|
|
|
|
$GroupID = (int)$GroupID;
|
|
if ($GroupID <= 0) {
|
|
return false;
|
|
}
|
|
|
|
$Rankings = $Cache->get_value('voting_ranks_overall');
|
|
if ($Rankings === false) {
|
|
$Rankings = array();
|
|
$i = 0;
|
|
$DB->query("SELECT GroupID FROM torrents_votes ORDER BY Score DESC LIMIT 100");
|
|
while (list($GID) = $DB->next_record()) {
|
|
$Rankings[$GID] = ++$i;
|
|
}
|
|
$Cache->cache_value('voting_ranks_overall', $Rankings, 259200);
|
|
}
|
|
|
|
return isset($Rankings[$GroupID])?$Rankings[$GroupID]:false;
|
|
}
|
|
|
|
/**
|
|
* Gets where this album ranks in its year.
|
|
* @global CACHE $Cache
|
|
* @global DB_MYSQL $DB
|
|
* @param int $GroupID GroupID of the album
|
|
* @param int $Year Year it was released
|
|
* @return int Rank for its year
|
|
*/
|
|
public static function get_rank_year($GroupID, $Year) {
|
|
global $Cache, $DB;
|
|
|
|
$GroupID = (int)$GroupID;
|
|
$Year = (int)$Year;
|
|
if ($GroupID <= 0 || $Year <= 0) {
|
|
return false;
|
|
}
|
|
|
|
$Rankings = $Cache->get_value('voting_ranks_year_'.$Year);
|
|
if ($Rankings === false) {
|
|
$Rankings = array();
|
|
$i = 0;
|
|
$DB->query("SELECT GroupID
|
|
FROM torrents_votes AS v
|
|
JOIN torrents_group AS g ON g.ID = v.GroupID
|
|
WHERE g.Year = $Year
|
|
ORDER BY Score DESC LIMIT 100");
|
|
while (list($GID) = $DB->next_record()) {
|
|
$Rankings[$GID] = ++$i;
|
|
}
|
|
$Cache->cache_value('voting_ranks_year_'.$Year , $Rankings, 259200);
|
|
}
|
|
|
|
return isset($Rankings[$GroupID])?$Rankings[$GroupID]:false;
|
|
}
|
|
|
|
/**
|
|
* Gets where this album ranks in its decade.
|
|
* @global CACHE $Cache
|
|
* @global DB_MYSQL $DB
|
|
* @param int $GroupID GroupID of the album
|
|
* @param int $Year Year it was released
|
|
* @return int Rank for its year
|
|
*/
|
|
public static function get_rank_decade($GroupID, $Year) {
|
|
global $Cache, $DB;
|
|
|
|
$GroupID = (int)$GroupID;
|
|
$Year = (int)$Year;
|
|
$Year = (int)$Year;
|
|
if ((int)$GroupID <= 0 || (int)$Year <= 0) {
|
|
return false;
|
|
}
|
|
|
|
// First year of the decade
|
|
$Year = $Year - ($Year % 10);
|
|
|
|
$Rankings = $Cache->get_value('voting_ranks_decade_'.$Year);
|
|
if ($Rankings === false) {
|
|
$Rankings = array();
|
|
$i = 0;
|
|
$DB->query("SELECT GroupID
|
|
FROM torrents_votes AS v
|
|
JOIN torrents_group AS g ON g.ID = v.GroupID
|
|
WHERE g.Year BETWEEN $Year AND ".($Year+9)."
|
|
AND g.CategoryID = 1
|
|
ORDER BY Score DESC LIMIT 100");
|
|
while (list($GID) = $DB->next_record()) {
|
|
$Rankings[$GID] = ++$i;
|
|
}
|
|
$Cache->cache_value('voting_ranks_decade_'.$Year , $Rankings, 259200);
|
|
}
|
|
|
|
return isset($Rankings[$GroupID])?$Rankings[$GroupID]:false;
|
|
}
|
|
}
|
|
?>
|