<?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;
$pruned_topic_list = array();
//
// Those without polls ...
//
$sql = "SELECT t.topic_id
FROM " . POSTS_TABLE . " p, " . TOPICS_TABLE . " t
WHERE t.forum_id = $forum_id
AND t.topic_vote = 0
AND t.topic_type <> " . POST_ANNOUNCE . "
AND p.post_id = t.topic_last_post_id";
if ($prune_date != "")
{
$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);
}
if( $pruned_topics = $db->sql_numrows($result_topics) )
{
$pruned_topic_list = $db->sql_fetchrowset($result_topics);
$sql_topics = "";
for($i = 0; $i < $pruned_topics; $i++)
{
if($sql_topics != "")
{
$sql_topics .= ", ";
}
$sql_topics .= $pruned_topic_list[$i]['topic_id'];
}
$sql_topics = "topic_id IN (" . $sql_topics . ")";
$sql = "SELECT post_id
FROM " . POSTS_TABLE . "
WHERE forum_id = $forum_id
AND $sql_topics";
if(!$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);
$pruned_post_list = $db->sql_fetchrowset($result_posts);
$sql_post = "";
for($i = 0; $i < $pruned_posts; $i++)
{
$post_id = $pruned_post_list[$i]['post_id'];
if( $sql_post != "" )
{
$sql_post .= ", ";
}
$sql_post .= $post_id;
}
$sql_post = "post_id IN (" . $sql_post . ")";
$sql = "DELETE FROM " . TOPICS_TABLE . "
WHERE $sql_topics";
if(!$result = $db->sql_query($sql))
{
message_die(GENERAL_ERROR, "Couldn't delete topics during prune.", "", __LINE__, __FILE__, $sql);
}
$sql = "DELETE FROM " . POSTS_TABLE . "
WHERE $sql_post";
if( $result = $db->sql_query($sql, BEGIN_TRANSACTION) )
{
$sql = "DELETE FROM " . POSTS_TEXT_TABLE . "
WHERE $sql_post";
if( $result = $db->sql_query($sql) )
{
$sql = "DELETE FROM " . SEARCH_MATCH_TABLE . "
WHERE $sql_post";
if( !$result = $db->sql_query($sql, END_TRANSACTION) )
{
message_die(GENERAL_ERROR, "Couldn't delete search matches", "", __LINE__, __FILE__, $sql);
}
}
else
{
message_die(GENERAL_ERROR, "Couldn't delete post during prune.", "", __LINE__, __FILE__, $sql);
}
}
else
{
message_die(GENERAL_ERROR, "Couldn't delete post_text during prune.", "", __LINE__, __FILE__, $sql);
}
//
// Remove any words in search wordlist which no longer
// appear in posts
//
switch(SQL_LAYER)
{
case 'postgresql':
$sql = "DELETE FROM " . SEARCH_WORD_TABLE . "
WHERE word_id NOT IN (
SELECT word_id
FROM " . SEARCH_MATCH_TABLE . "
GROUP BY word_id)";
$result = $db->sql_query($sql);
if( !$result )
{
message_die(GENERAL_ERROR, "Couldn't delete old words from word table", __LINE__, __FILE__, $sql);
}
break;
case 'oracle':
$sql = "DELETE FROM " . SEARCH_WORD_TABLE . "
WHERE word_id IN (
SELECT w.word_id
FROM " . SEARCH_WORD_TABLE . " w, " . SEARCH_MATCH_TABLE . " m
WHERE w.word_id = m.word_id(+)
AND m.word_id IS NULL)";
$result = $db->sql_query($sql);
if( !$result )
{
message_die(GENERAL_ERROR, "Couldn't delete old words from word table", __LINE__, __FILE__, $sql);
}
break;
case 'mssql':
case 'msaccess':
$sql = "DELETE FROM " . SEARCH_WORD_TABLE . "
WHERE word_id IN (
SELECT w.word_id
FROM " . SEARCH_WORD_TABLE . " w
LEFT JOIN " . SEARCH_MATCH_TABLE . " m ON m.word_id = w.word_id
WHERE m.word_id IS NULL)";
$result = $db->sql_query($sql);
if( !$result )
{
message_die(GENERAL_ERROR, "Couldn't delete old words from word table", __LINE__, __FILE__, $sql);
}
break;
case 'mysql':
case 'mysql4':
// 0.07s
$sql = "SELECT w.word_id
FROM " . SEARCH_WORD_TABLE . " w
LEFT JOIN " . SEARCH_MATCH_TABLE . " m ON m.word_id = w.word_id
WHERE m.word_id IS NULL";
if( $result = $db->sql_query($sql) )
{
if( $db->sql_numrows($result) )
{
$rowset = array();
while( $row = $db->sql_fetchrow($result) )
{
$rowset[] = $row['word_id'];
}
$word_id_sql = implode(", ", $rowset);
if( $word_id_sql )
{
// 0.07s (about 15-20 words)
$sql = "DELETE FROM " . SEARCH_WORD_TABLE . "
WHERE word_id IN ($word_id_sql)";
$result = $db->sql_query($sql);
if( !$result )
{
message_die(GENERAL_ERROR, "Couldn't delete word list entry", "", __LINE__, __FILE__, $sql);
}
}
}
}
break;
}
$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);
}
return array (
"topics" => $pruned_topics,
"posts" => $pruned_posts);
}
else
{
return array(
"topics" => 0,
"posts" => 0);
}
}
/***************************************************************************\
*
* Function auto_prune(), this function will read the configuration data from
* the auto_prune table and call the prune function with the necessary info.
*
****************************************************************************/
function auto_prune($forum_id = 0)
{
global $db, $lang;
$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__);
}
if( $db->sql_numrows($result) )
{
$row = $db->sql_fetchrow($result);
if( $row['prune_freq'] && $row['prune_days'] )
{
$prune_date = time() - ( $row['prune_days'] * 86400 );
prune($forum_id, $prune_date);
$next_prune = time() + ( $row['prune_freq'] * 86400 );
$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;
}
?>