php-phpbb/phpBB/includes/prune.php

<?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.
 *
 ***************************************************************************/

require($phpbb_root_path . 'includes/search.'.$phpEx);

function prune($forum_id, $prune_date)
{
	global $db, $lang;

	//
	// 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 = $db->sql_query($sql)) )
	{
		message_die(GENERAL_ERROR, "Couldn't obtain lists of topics to prune.", "", __LINE__, __FILE__, $sql);
	}

	$sql_topics = "";
	while( $row = $db->sql_fetchrow($result) )
	{
		$sql_topics .= ( ( $sql_topics != "" ) ? ", " : "" ) . $row['topic_id'];
	}
		
	if( $sql_topics != "" )
	{
		$sql = "SELECT post_id
			FROM " . POSTS_TABLE . " 
			WHERE forum_id = $forum_id 
				AND topic_id IN ($sql_topics)";
		if ( !($result = $db->sql_query($sql)) )
		{
			message_die(GENERAL_ERROR, "Couldn't obtain list of posts to prune.", "", __LINE__, __FILE__, $sql);
		}

		$sql_post = "";
		while ( $row = $db->sql_fetchrow($result) )
		{
			$sql_post .= ( ( $sql_post != "" ) ? ", " : "" ) . $row['post_id'];
		}

		if ( $sql_post != "" )
		{
			$sql = "DELETE FROM " . TOPICS_TABLE . " 
				WHERE topic_id IN ($sql_topics)";
			if ( !($result = $db->sql_query($sql, BEGIN_TRANSACTION)) )
			{
				message_die(GENERAL_ERROR, "Couldn't delete topics during prune.", "", __LINE__, __FILE__, $sql);
			}

			$pruned_topics = $db->sql_affectedrows();

			$sql = "DELETE FROM " . POSTS_TABLE . " 
				WHERE post_id IN ($sql_post)";
			if ( !($result = $db->sql_query($sql)) )
			{
				message_die(GENERAL_ERROR, "Couldn't delete post_text during prune.", "", __LINE__, __FILE__, $sql);
			}

			$pruned_posts = $db->sql_affectedrows();

			$sql = "DELETE FROM " . POSTS_TEXT_TABLE . " 
				WHERE post_id IN ($sql_post)";
			if ( !($result = $db->sql_query($sql)) )
			{
				message_die(GENERAL_ERROR, "Couldn't delete post during prune.", "", __LINE__, __FILE__, $sql);
			}

			$sql = "DELETE FROM " . SEARCH_MATCH_TABLE . " 
				WHERE post_id IN ($sql_post)";
			if ( !($result = $db->sql_query($sql)) )
			{
				message_die(GENERAL_ERROR, "Couldn't delete search matches", "", __LINE__, __FILE__, $sql);
			}

			remove_unmatched_words();

			$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);
		}
	}

	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 ( $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;
}

?>