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<?php
/***************************************************************************
* prune.php
* -------------------
* begin : Thursday, June 14, 2001
* copyright : (C) 2001 The phpBB Group
* email : support@phpbb.com
*
* $Id$
*
*
***************************************************************************/
/***************************************************************************
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
***************************************************************************/
function prune($forum_id, $prune_date)
{
global $db, $lang;
$sql = "SELECT t.topic_id
FROM " . POSTS_TABLE . " p, " . TOPICS_TABLE . " t
WHERE t.forum_id = $forum_id
AND t.topic_type = " . POST_NORMAL . "
AND p.post_id = t.topic_last_post_id";
// Do we want to delete everything in the forum?
if ($prune_date != FALSE)
{
$sql .= " AND p.post_time < $prune_date";
}
if(!$result_topics = $db->sql_query($sql))
{
message_die(GENERAL_ERROR, "Couldn't obtain lists of topics to prune.", "", __LINE__, __FILE__, $sql);
}
$pruned_topics = $db->sql_numrows($result_topics);
$sql = "SELECT p.post_id
FROM " . POSTS_TABLE . " p, " . TOPICS_TABLE . " t
WHERE p.forum_id = $forum_id
AND t.topic_id = p.topic_id
AND t.topic_type = " . POST_NORMAL;
// Do we want to delete everything in the forum?
if ($prune_date != FALSE)
{
$sql .= " AND p.post_time < $prune_date";
}
if(!$result_posts = $db->sql_query($sql))
{
message_die(GENERAL_ERROR, "Couldn't obtain list of posts to prune.", "", __LINE__, __FILE__, $sql);
}
$pruned_posts = $db->sql_numrows($result_posts);
if( $pruned_topics > 0 )
{
$pruned_topic_list = $db->sql_fetchrowset($result_topics);
$sql_topics = "";
for($i = 0; $i < $pruned_topics; $i++)
{
if($sql_topics != "")
{
$sql_topics .= " OR ";
}
$sql_topics .= "topic_id = " . $pruned_topic_list[$i]['topic_id'];
}
$sql_topics = "DELETE FROM " . TOPICS_TABLE . " WHERE " . $sql_topics;
if(!$result = $db->sql_query($sql_topics))
{
message_die(GENERAL_ERROR, "Couldn't delete topics during prune.", "", __LINE__, __FILE__, $sql_topics);
}
}
if( $pruned_posts > 0 )
{
$pruned_post_list = $db->sql_fetchrowset($result_posts);
$sql_post_text = "";
$sql_post = "";
for($i = 0; $i < $pruned_posts; $i++)
{
$post_id = $pruned_post_list[$i]['post_id'];
if($sql_post_text != "")
{
$sql_post_text .= " OR ";
}
$sql_post_text .= "post_id = $post_id";
if($sql_post != "")
{
$sql_post .= " OR ";
}
$sql_post .= "post_id = $post_id";
}
$sql_post_text = "DELETE FROM " . POSTS_TEXT_TABLE . " WHERE " . $sql_post_text;
$sql_post = "DELETE FROM " . POSTS_TABLE . " WHERE " . $sql_post;
if(!$result = $db->sql_query($sql_post_text, BEGIN_TRANSACTION))
{
message_die(GENERAL_ERROR, "Couldn't delete post_text during prune.", "", __LINE__, __FILE__, $sql_post_text);
}
else
{
if(!$result = $db->sql_query($sql_post, END_TRANSACTION))
{
message_die(GENERAL_ERROR, "Couldn't delete post during prune.", "", __LINE__, __FILE__, $sql_post);
}
}
}
$sql = "UPDATE " . FORUMS_TABLE . "
SET forum_topics = forum_topics - $pruned_topics, forum_posts = forum_posts - $pruned_posts
WHERE forum_id = $forum_id";
if(!$result = $db->sql_query($sql))
{
message_die(GENERAL_ERROR, "Couldn't update forum data after prune.", "", __LINE__, __FILE__, $sql);
}
$returnval = array (
"topics" => $pruned_topics,
"posts" => $pruned_posts);
return $returnval;
}
/***************************************************************************\
*
* Function auto_prune(), this function will read the configuration data from
* the auto_prune table and call the prune function with the necessary info.
*
****************************************************************************/
function auto_prune($forum_id = 0)
{
global $db, $lang;
$one_day = 60 * 60 * 24;
$sql = "SELECT *
FROM " . PRUNE_TABLE . "
WHERE forum_id = $forum_id";
if(!$result = $db->sql_query($sql))
{
message_die(GENERAL_ERROR, "Auto-Prune: Couldn't read auto_prune table.", __LINE__, __FILE__);
}
while($row = $db->sql_fetchrow($result))
{
$forum_id = $row['forum_id'];
$prune_date = time() - ($row['prune_days'] * $one_day);
$pruned = prune($forum_id, $prune_date);
$next_prune = time() + ($row['prune_freq'] * $one_day);
$sql = "UPDATE " . FORUMS_TABLE . "
SET prune_next = $next_prune
WHERE forum_id = $forum_id";
if(!$db->sql_query($sql))
{
message_die(GENERAL_ERROR, "Auto-Prune: Couldn't update forum table.", __LINE__, __FILE__);
}
}
return;
}
?>
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