Gazelle/classes/class_user_rank.php

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<?
define('PREFIX', 'percentiles_'); // Prefix for memcache keys, to make life easier
class USER_RANK {
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// Returns a 101 row array (101 percentiles - 0 - 100), with the minimum value for that percentile as the value for each row
// BTW - ingenious
function build_table($MemKey, $Query) {
global $Cache,$DB;
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$DB->query("DROP TEMPORARY TABLE IF EXISTS temp_stats");
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$DB->query("CREATE TEMPORARY TABLE temp_stats
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(ID int(10) NOT NULL PRIMARY KEY AUTO_INCREMENT,
Val bigint(20) NOT NULL);");
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$DB->query("INSERT INTO temp_stats (Val) ".$Query);
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$DB->query("SELECT COUNT(ID) FROM temp_stats");
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list($UserCount) = $DB->next_record();
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$DB->query("SELECT MIN(Val) FROM temp_stats GROUP BY CEIL(ID/(".(int)$UserCount."/100));");
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$Table = $DB->to_array();
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// Give a little variation to the cache length, so all the tables don't expire at the same time
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$Cache->cache_value($MemKey, $Table, 3600*24*rand(800,1000)*0.001);
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return $Table;
}
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function table_query($TableName) {
switch($TableName) {
case 'uploaded':
$Query = "SELECT Uploaded FROM users_main WHERE Enabled='1' AND Uploaded>0 ORDER BY Uploaded;";
break;
case 'downloaded':
$Query = "SELECT Downloaded FROM users_main WHERE Enabled='1' AND Downloaded>0 ORDER BY Downloaded;";
break;
case 'uploads':
$Query = "SELECT COUNT(t.ID) AS Uploads FROM users_main AS um JOIN torrents AS t ON t.UserID=um.ID WHERE um.Enabled='1' GROUP BY um.ID ORDER BY Uploads;";
break;
case 'requests':
$Query = "SELECT COUNT(r.ID) AS Requests FROM users_main AS um JOIN requests AS r ON r.FillerID=um.ID WHERE um.Enabled='1' GROUP BY um.ID ORDER BY Requests;";
break;
case 'posts':
$Query = "SELECT COUNT(p.ID) AS Posts FROM users_main AS um JOIN forums_posts AS p ON p.AuthorID=um.ID WHERE um.Enabled='1' GROUP BY um.ID ORDER BY Posts;";
break;
case 'bounty':
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$Query = "SELECT SUM(rv.Bounty) AS Bounty FROM users_main AS um JOIN requests_votes AS rv ON rv.UserID=um.ID WHERE um.Enabled='1' GROUP BY um.ID ORDER BY Bounty;";
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break;
case 'artists':
$Query = "SELECT COUNT(ta.ArtistID) AS Artists FROM torrents_artists AS ta JOIN torrents_group AS tg ON tg.ID=ta.GroupID JOIN torrents AS t ON t.GroupID = tg.ID WHERE t.UserID != ta.UserID GROUP BY tg.ID ORDER BY Artists ASC";
break;
}
return $Query;
}
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function get_rank($TableName, $Value) {
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if ($Value == 0) {
return 0;
}
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global $Cache, $DB;
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$Table = $Cache->get_value(PREFIX.$TableName);
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if (!$Table) {
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//Cache lock!
$Lock = $Cache->get_value(PREFIX.$TableName."_lock");
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if ($Lock) {
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return false;
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} else {
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$Cache->cache_value(PREFIX.$TableName."_lock", '1', 300);
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$Table = $this->build_table(PREFIX.$TableName, $this->table_query($TableName));
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$Cache->delete_value(PREFIX.$TableName."_lock");
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}
}
$LastPercentile = 0;
foreach ($Table as $Row) {
list($CurValue) = $Row;
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if ($CurValue >= $Value) {
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return $LastPercentile;
}
$LastPercentile++;
}
return 100; // 100th percentile
}
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function overall_score($Uploaded, $Downloaded, $Uploads, $Requests, $Posts, $Bounty, $Artists, $Ratio) {
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// We can do this all in 1 line, but it's easier to read this way
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if ($Ratio > 1) {
$Ratio = 1;
}
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$TotalScore = 0;
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if (in_array(false, func_get_args(), true)) {
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return false;
}
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$TotalScore += $Uploaded*15;
$TotalScore += $Downloaded*8;
$TotalScore += $Uploads*25;
$TotalScore += $Requests*2;
$TotalScore += $Posts;
$TotalScore += $Bounty;
$TotalScore += $Artists;
$TotalScore /= (15+8+25+2+1+1+1);
$TotalScore *= $Ratio;
return $TotalScore;
}
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}
?>