Gazelle/sections/torrents/merge.php

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<?
if(!check_perms('torrents_edit')) { error(403); }
$GroupID = $_POST['groupid'];
$OldGroupID = $GroupID;
$NewGroupID = db_string($_POST['targetgroupid']);
if(!$GroupID || !is_number($GroupID)) { error(404); }
if(!$NewGroupID || !is_number($NewGroupID)) { error(404); }
if($NewGroupID == $GroupID) {
error('Old group ID is the same as new group ID!');
}
$DB->query("SELECT CategoryID, Name FROM torrents_group WHERE ID='$NewGroupID'");
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if($DB->record_count()==0) {
error('Target group does not exist.');
}
list($CategoryID, $NewName) = $DB->next_record();
if($Categories[$CategoryID-1] != 'Music') {
error('Only music groups can be merged.');
}
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$DB->query("SELECT Name FROM torrents_group WHERE ID = ".$GroupID);
list($Name) = $DB->next_record();
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//Everything is legit, let's just confim they're not retarded
if(empty($_POST['confirm'])) {
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$Artists = Artists::get_artists(array($GroupID, $NewGroupID));
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View::show_header();
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?>
<div class="center thin">
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<div class="header">
<h2>Merge Confirm!</h2>
</div>
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<div class="box pad">
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<form class="confirm_form" name="torrent_group" action="torrents.php" method="post">
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<input type="hidden" name="action" value="merge" />
<input type="hidden" name="auth" value="<?=$LoggedUser['AuthKey']?>" />
<input type="hidden" name="confirm" value="true" />
<input type="hidden" name="groupid" value="<?=$GroupID?>" />
<input type="hidden" name="targetgroupid" value="<?=$NewGroupID?>" />
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<h3>You are attempting to merge the group:</h3>
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<ul><li><?= Artists::display_artists($Artists[$GroupID], true, false)?> - <a href="torrents.php?id=<?=$GroupID?>"><?=$Name?></a></li></ul>
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<h3>Into the group:</h3>
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<ul><li><?= Artists::display_artists($Artists[$NewGroupID], true, false)?> - <a href="torrents.php?id=<?=$NewGroupID?>"><?=$NewName?></a></li></ul>
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<input type="submit" value="Confirm" />
</form>
</div>
</div>
<?
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View::show_footer();
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} else {
authorize();
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// Votes ninjutsu. This is so annoyingly complicated.
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// 1. Get a list of everybody who voted on the old group and clear their cache keys
$DB->query("SELECT UserID FROM users_votes WHERE GroupID='$GroupID'");
while (list($UserID) = $DB->next_record()) {
$Cache->delete_value('voted_albums_'.$UserID);
}
// 2. Update the existing votes where possible, clear out the duplicates left by key
// conflicts, and update the torrents_votes table
$DB->query("UPDATE IGNORE users_votes SET GroupID='$NewGroupID' WHERE GroupID='$GroupID'");
$DB->query("DELETE FROM users_votes WHERE GroupID='$GroupID'");
$DB->query("INSERT INTO torrents_votes (GroupID, Ups, Total, Score)
SELECT $NewGroupID, UpVotes, TotalVotes, VoteScore
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FROM (SELECT IFNULL(SUM(IF(Type='Up',1,0)),0) As UpVotes,
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COUNT(1) AS TotalVotes,
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binomial_ci(IFNULL(SUM(IF(Type='Up',1,0)),0), COUNT(1)) AS VoteScore
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FROM users_votes
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WHERE GroupID = $NewGroupID
GROUP BY GroupID) AS a
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ON DUPLICATE KEY UPDATE
Ups = a.UpVotes,
Total = a.TotalVotes,
Score = a.VoteScore;");
// 3. Clear the votes_pairs keys!
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$DB->query("SELECT v2.GroupID
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FROM users_votes AS v1
INNER JOIN users_votes AS v2 USING (UserID)
WHERE (v1.Type = 'Up' OR v2.Type='Up')
AND (v1.GroupID IN($GroupID, $NewGroupID))
AND (v2.GroupID NOT IN($GroupID, $NewGroupID));");
while (list($CacheGroupID) = $DB->next_record()) {
$Cache->delete_value('vote_pairs_'.$CacheGroupID);
}
// 4. Clear the new groups vote keys
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$Cache->delete_value('votes_'.$NewGroupID);
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$DB->query("UPDATE torrents SET GroupID='$NewGroupID' WHERE GroupID='$GroupID'");
$DB->query("UPDATE wiki_torrents SET PageID='$NewGroupID' WHERE PageID='$GroupID'");
$DB->query("UPDATE torrents_comments SET GroupID='$NewGroupID' WHERE GroupID='$GroupID'");
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Torrents::delete_group($GroupID);
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Torrents::write_group_log($NewGroupID, 0, $LoggedUser['ID'], "Merged Group ".$GroupID." (".$Name.") to ".$NewGroupID." (".$NewName.")", 0);
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$DB->query("UPDATE group_log SET GroupID = ".$NewGroupID." WHERE GroupID = ".$GroupID);
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$GroupID=$NewGroupID;
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//Collages
$DB->query("SELECT CollageID FROM collages_torrents WHERE GroupID='$OldGroupID'"); //Select all collages that contain edited group
while(list($CollageID) = $DB->next_record()) {
$DB->query("UPDATE IGNORE collages_torrents SET GroupID='$NewGroupID' WHERE GroupID='$OldGroupID' AND CollageID='$CollageID'"); //Change collage groupid to new ID
$DB->query("DELETE FROM collages_torrents WHERE GroupID='$OldGroupID' AND CollageID='$CollageID'");
$Cache->delete_value('collage_'.$CollageID);
}
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//Requests
$DB->query("SELECT ID FROM requests WHERE GroupID='$OldGroupID'");
$Requests = $DB->collect('ID');
$DB->query("UPDATE requests SET GroupID = 'NewGroupID' WHERE GroupID = '$OldGroupID'");
foreach ($Requests as $RequestID) {
$Cache->delete_value('request_'.$RequestID);
}
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$DB->query("SELECT ID FROM torrents WHERE GroupID='$OldGroupID'");
while(list($TorrentID) = $DB->next_record()) {
$Cache->delete_value('torrent_download_'.$TorrentID);
}
$Cache->delete_value('torrents_details_'.$GroupID);
$Cache->delete_value('torrent_comments_'.$GroupID.'_catalogue_0');
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$Cache->delete_value('torrent_comments_'.$GroupID);
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$Cache->delete_value('groups_artists_'.$GroupID);
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Torrents::update_hash($GroupID);
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header('Location: torrents.php?id='.$GroupID);
}
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?>