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./othercms/phpBB3/includes/functions_admin.php
<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/

/**
* @ignore
*/
if (!defined('IN_PHPBB'))
{
    exit;
}

/**
* Recalculate Nested Sets
*
* @param int    $new_id    first left_id (should start with 1)
* @param string    $pkey    primary key-column (containing the id for the parent_id of the children)
* @param string    $table    constant or fullname of the table
* @param int    $parent_id parent_id of the current set (default = 0)
* @param array    $where    contains strings to compare closer on the where statement (additional)
*/
function recalc_nested_sets(&$new_id, $pkey, $table, $parent_id = 0, $where = array())
{
    global
$db;

   
$sql = 'SELECT *
        FROM '
. $table . '
        WHERE parent_id = '
. (int) $parent_id .
        ((!empty(
$where)) ? ' AND ' . implode(' AND ', $where) : '') . '
        ORDER BY left_id ASC'
;
   
$result = $db->sql_query($sql);
    while (
$row = $db->sql_fetchrow($result))
    {
       
// First we update the left_id for this module
       
if ($row['left_id'] != $new_id)
        {
           
$db->sql_query('UPDATE ' . $table . ' SET ' . $db->sql_build_array('UPDATE', array('left_id' => $new_id)) . " WHERE $pkey = {$row[$pkey]}");
        }
       
$new_id++;

       
// Then we go through any children and update their left/right id's
       
recalc_nested_sets($new_id, $pkey, $table, $row[$pkey], $where);

       
// Then we come back and update the right_id for this module
       
if ($row['right_id'] != $new_id)
        {
           
$db->sql_query('UPDATE ' . $table . ' SET ' . $db->sql_build_array('UPDATE', array('right_id' => $new_id)) . " WHERE $pkey = {$row[$pkey]}");
        }
       
$new_id++;
    }
   
$db->sql_freeresult($result);
}

/**
* Simple version of jumpbox, just lists authed forums
*/
function make_forum_select($select_id = false, $ignore_id = false, $ignore_acl = false, $ignore_nonpost = false, $ignore_emptycat = true, $only_acl_post = false, $return_array = false)
{
    global
$db, $auth, $phpbb_dispatcher;

   
// This query is identical to the jumpbox one
   
$sql = 'SELECT forum_id, forum_name, parent_id, forum_type, forum_flags, forum_options, left_id, right_id
        FROM '
. FORUMS_TABLE . '
        ORDER BY left_id ASC'
;
   
$result = $db->sql_query($sql, 600);

   
$rowset = array();
    while (
$row = $db->sql_fetchrow($result))
    {
       
$rowset[(int) $row['forum_id']] = $row;
    }
   
$db->sql_freeresult($result);

   
$right = 0;
   
$padding_store = array('0' => '');
   
$padding = '';
   
$forum_list = ($return_array) ? array() : '';

   
/**
    * Modify the forum list data
    *
    * @event core.make_forum_select_modify_forum_list
    * @var    array    rowset    Array with the forums list data
    * @since 3.1.10-RC1
    */
   
$vars = array('rowset');
   
extract($phpbb_dispatcher->trigger_event('core.make_forum_select_modify_forum_list', compact($vars)));

   
// Sometimes it could happen that forums will be displayed here not be displayed within the index page
    // This is the result of forums not displayed at index, having list permissions and a parent of a forum with no permissions.
    // If this happens, the padding could be "broken"

   
foreach ($rowset as $row)
    {
        if (
$row['left_id'] < $right)
        {
           
$padding .= '&nbsp; &nbsp;';
           
$padding_store[$row['parent_id']] = $padding;
        }
        else if (
$row['left_id'] > $right + 1)
        {
           
$padding = (isset($padding_store[$row['parent_id']])) ? $padding_store[$row['parent_id']] : '';
        }

       
$right = $row['right_id'];
       
$disabled = false;

        if (!
$ignore_acl && $auth->acl_gets(array('f_list', 'a_forum', 'a_forumadd', 'a_forumdel'), $row['forum_id']))
        {
            if (
$only_acl_post && !$auth->acl_get('f_post', $row['forum_id']) || (!$auth->acl_get('m_approve', $row['forum_id']) && !$auth->acl_get('f_noapprove', $row['forum_id'])))
            {
               
$disabled = true;
            }
        }
        else if (!
$ignore_acl)
        {
            continue;
        }

        if (
            ((
is_array($ignore_id) && in_array($row['forum_id'], $ignore_id)) || $row['forum_id'] == $ignore_id)
            ||
           
// Non-postable forum with no subforums, don't display
           
($row['forum_type'] == FORUM_CAT && ($row['left_id'] + 1 == $row['right_id']) && $ignore_emptycat)
            ||
            (
$row['forum_type'] != FORUM_POST && $ignore_nonpost)
            )
        {
           
$disabled = true;
        }

        if (
$return_array)
        {
           
// Include some more information...
           
$selected = (is_array($select_id)) ? ((in_array($row['forum_id'], $select_id)) ? true : false) : (($row['forum_id'] == $select_id) ? true : false);
           
$forum_list[$row['forum_id']] = array_merge(array('padding' => $padding, 'selected' => ($selected && !$disabled), 'disabled' => $disabled), $row);
        }
        else
        {
           
$selected = (is_array($select_id)) ? ((in_array($row['forum_id'], $select_id)) ? ' selected="selected"' : '') : (($row['forum_id'] == $select_id) ? ' selected="selected"' : '');
           
$forum_list .= '<option value="' . $row['forum_id'] . '"' . (($disabled) ? ' disabled="disabled" class="disabled-option"' : $selected) . '>' . $padding . $row['forum_name'] . '</option>';
        }
    }
    unset(
$padding_store, $rowset);

    return
$forum_list;
}

/**
* Generate size select options
*/
function size_select_options($size_compare)
{
    global
$user;

   
$size_types_text = array($user->lang['BYTES'], $user->lang['KIB'], $user->lang['MIB']);
   
$size_types = array('b', 'kb', 'mb');

   
$s_size_options = '';

    for (
$i = 0, $size = count($size_types_text); $i < $size; $i++)
    {
       
$selected = ($size_compare == $size_types[$i]) ? ' selected="selected"' : '';
       
$s_size_options .= '<option value="' . $size_types[$i] . '"' . $selected . '>' . $size_types_text[$i] . '</option>';
    }

    return
$s_size_options;
}

/**
* Generate list of groups (option fields without select)
*
* @param int $group_id The default group id to mark as selected
* @param array $exclude_ids The group ids to exclude from the list, false (default) if you whish to exclude no id
* @param int $manage_founder If set to false (default) all groups are returned, if 0 only those groups returned not being managed by founders only, if 1 only those groups returned managed by founders only.
*
* @return string The list of options.
*/
function group_select_options($group_id, $exclude_ids = false, $manage_founder = false)
{
    global
$db, $config, $phpbb_container;

   
/** @var \phpbb\group\helper $group_helper */
   
$group_helper = $phpbb_container->get('group_helper');

   
$exclude_sql = ($exclude_ids !== false && count($exclude_ids)) ? 'WHERE ' . $db->sql_in_set('group_id', array_map('intval', $exclude_ids), true) : '';
   
$sql_and = (!$config['coppa_enable']) ? (($exclude_sql) ? ' AND ' : ' WHERE ') . "group_name <> 'REGISTERED_COPPA'" : '';
   
$sql_founder = ($manage_founder !== false) ? (($exclude_sql || $sql_and) ? ' AND ' : ' WHERE ') . 'group_founder_manage = ' . (int) $manage_founder : '';

   
$sql = 'SELECT group_id, group_name, group_type
        FROM '
. GROUPS_TABLE . "
       
$exclude_sql
       
$sql_and
       
$sql_founder
        ORDER BY group_type DESC, group_name ASC"
;
   
$result = $db->sql_query($sql);

   
$s_group_options = '';
    while (
$row = $db->sql_fetchrow($result))
    {
       
$selected = ($row['group_id'] == $group_id) ? ' selected="selected"' : '';
       
$s_group_options .= '<option' . (($row['group_type'] == GROUP_SPECIAL) ? ' class="sep"' : '') . ' value="' . $row['group_id'] . '"' . $selected . '>' . $group_helper->get_name($row['group_name']) . '</option>';
    }
   
$db->sql_freeresult($result);

    return
$s_group_options;
}

/**
* Obtain authed forums list
*/
function get_forum_list($acl_list = 'f_list', $id_only = true, $postable_only = false, $no_cache = false)
{
    global
$db, $auth, $phpbb_dispatcher;
    static
$forum_rows;

    if (!isset(
$forum_rows))
    {
       
// This query is identical to the jumpbox one
       
$expire_time = ($no_cache) ? 0 : 600;

       
$sql = 'SELECT forum_id, forum_name, parent_id, forum_type, left_id, right_id
            FROM '
. FORUMS_TABLE . '
            ORDER BY left_id ASC'
;
       
$result = $db->sql_query($sql, $expire_time);

       
$forum_rows = array();

       
$right = $padding = 0;
       
$padding_store = array('0' => 0);

        while (
$row = $db->sql_fetchrow($result))
        {
            if (
$row['left_id'] < $right)
            {
               
$padding++;
               
$padding_store[$row['parent_id']] = $padding;
            }
            else if (
$row['left_id'] > $right + 1)
            {
               
// Ok, if the $padding_store for this parent is empty there is something wrong. For now we will skip over it.
                // @todo digging deep to find out "how" this can happen.
               
$padding = (isset($padding_store[$row['parent_id']])) ? $padding_store[$row['parent_id']] : $padding;
            }

           
$right = $row['right_id'];
           
$row['padding'] = $padding;

           
$forum_rows[] = $row;
        }
       
$db->sql_freeresult($result);
        unset(
$padding_store);
    }

   
$rowset = array();
    foreach (
$forum_rows as $row)
    {
        if (
$postable_only && $row['forum_type'] != FORUM_POST)
        {
            continue;
        }

        if (
$acl_list == '' || ($acl_list != '' && $auth->acl_gets($acl_list, $row['forum_id'])))
        {
           
$rowset[] = ($id_only) ? (int) $row['forum_id'] : $row;
        }
    }

   
/**
    * Modify the forum list data
    *
    * @event core.get_forum_list_modify_data
    * @var    array    rowset    Array with the forum list data
    * @since 3.1.10-RC1
    */
   
$vars = array('rowset');
   
extract($phpbb_dispatcher->trigger_event('core.get_forum_list_modify_data', compact($vars)));

    return
$rowset;
}

/**
* Get forum branch
*/
function get_forum_branch($forum_id, $type = 'all', $order = 'descending', $include_forum = true)
{
    global
$db;

    switch (
$type)
    {
        case
'parents':
           
$condition = 'f1.left_id BETWEEN f2.left_id AND f2.right_id';
        break;

        case
'children':
           
$condition = 'f2.left_id BETWEEN f1.left_id AND f1.right_id';
        break;

        default:
           
$condition = 'f2.left_id BETWEEN f1.left_id AND f1.right_id OR f1.left_id BETWEEN f2.left_id AND f2.right_id';
        break;
    }

   
$rows = array();

   
$sql = 'SELECT f2.*
        FROM '
. FORUMS_TABLE . ' f1
        LEFT JOIN '
. FORUMS_TABLE . " f2 ON ($condition)
        WHERE f1.forum_id =
$forum_id
        ORDER BY f2.left_id "
. (($order == 'descending') ? 'ASC' : 'DESC');
   
$result = $db->sql_query($sql);

    while (
$row = $db->sql_fetchrow($result))
    {
        if (!
$include_forum && $row['forum_id'] == $forum_id)
        {
            continue;
        }

       
$rows[] = $row;
    }
   
$db->sql_freeresult($result);

    return
$rows;
}

/**
* Copies permissions from one forum to others
*
* @param int    $src_forum_id        The source forum we want to copy permissions from
* @param array    $dest_forum_ids        The destination forum(s) we want to copy to
* @param bool    $clear_dest_perms    True if destination permissions should be deleted
* @param bool    $add_log            True if log entry should be added
*
* @return bool                        False on error
*/
function copy_forum_permissions($src_forum_id, $dest_forum_ids, $clear_dest_perms = true, $add_log = true)
{
    global
$db, $user, $phpbb_log;

   
// Only one forum id specified
   
if (!is_array($dest_forum_ids))
    {
       
$dest_forum_ids = array($dest_forum_ids);
    }

   
// Make sure forum ids are integers
   
$src_forum_id = (int) $src_forum_id;
   
$dest_forum_ids = array_map('intval', $dest_forum_ids);

   
// No source forum or no destination forums specified
   
if (empty($src_forum_id) || empty($dest_forum_ids))
    {
        return
false;
    }

   
// Check if source forum exists
   
$sql = 'SELECT forum_name
        FROM '
. FORUMS_TABLE . '
        WHERE forum_id = '
. $src_forum_id;
   
$result = $db->sql_query($sql);
   
$src_forum_name = $db->sql_fetchfield('forum_name');
   
$db->sql_freeresult($result);

   
// Source forum doesn't exist
   
if (empty($src_forum_name))
    {
        return
false;
    }

   
// Check if destination forums exists
   
$sql = 'SELECT forum_id, forum_name
        FROM '
. FORUMS_TABLE . '
        WHERE '
. $db->sql_in_set('forum_id', $dest_forum_ids);
   
$result = $db->sql_query($sql);

   
$dest_forum_ids = $dest_forum_names = array();
    while (
$row = $db->sql_fetchrow($result))
    {
       
$dest_forum_ids[]    = (int) $row['forum_id'];
       
$dest_forum_names[]    = $row['forum_name'];
    }
   
$db->sql_freeresult($result);

   
// No destination forum exists
   
if (empty($dest_forum_ids))
    {
        return
false;
    }

   
// From the mysql documentation:
    // Prior to MySQL 4.0.14, the target table of the INSERT statement cannot appear
    // in the FROM clause of the SELECT part of the query. This limitation is lifted in 4.0.14.
    // Due to this we stay on the safe side if we do the insertion "the manual way"

    // Rowsets we're going to insert
   
$users_sql_ary = $groups_sql_ary = array();

   
// Query acl users table for source forum data
   
$sql = 'SELECT user_id, auth_option_id, auth_role_id, auth_setting
        FROM '
. ACL_USERS_TABLE . '
        WHERE forum_id = '
. $src_forum_id;
   
$result = $db->sql_query($sql);

    while (
$row = $db->sql_fetchrow($result))
    {
       
$row = array(
           
'user_id'            => (int) $row['user_id'],
           
'auth_option_id'    => (int) $row['auth_option_id'],
           
'auth_role_id'        => (int) $row['auth_role_id'],
           
'auth_setting'        => (int) $row['auth_setting'],
        );

        foreach (
$dest_forum_ids as $dest_forum_id)
        {
           
$users_sql_ary[] = $row + array('forum_id' => $dest_forum_id);
        }
    }
   
$db->sql_freeresult($result);

   
// Query acl groups table for source forum data
   
$sql = 'SELECT group_id, auth_option_id, auth_role_id, auth_setting
        FROM '
. ACL_GROUPS_TABLE . '
        WHERE forum_id = '
. $src_forum_id;
   
$result = $db->sql_query($sql);

    while (
$row = $db->sql_fetchrow($result))
    {
       
$row = array(
           
'group_id'            => (int) $row['group_id'],
           
'auth_option_id'    => (int) $row['auth_option_id'],
           
'auth_role_id'        => (int) $row['auth_role_id'],
           
'auth_setting'        => (int) $row['auth_setting'],
        );

        foreach (
$dest_forum_ids as $dest_forum_id)
        {
           
$groups_sql_ary[] = $row + array('forum_id' => $dest_forum_id);
        }
    }
   
$db->sql_freeresult($result);

   
$db->sql_transaction('begin');

   
// Clear current permissions of destination forums
   
if ($clear_dest_perms)
    {
       
$sql = 'DELETE FROM ' . ACL_USERS_TABLE . '
            WHERE '
. $db->sql_in_set('forum_id', $dest_forum_ids);
       
$db->sql_query($sql);

       
$sql = 'DELETE FROM ' . ACL_GROUPS_TABLE . '
            WHERE '
. $db->sql_in_set('forum_id', $dest_forum_ids);
       
$db->sql_query($sql);
    }

   
$db->sql_multi_insert(ACL_USERS_TABLE, $users_sql_ary);
   
$db->sql_multi_insert(ACL_GROUPS_TABLE, $groups_sql_ary);

    if (
$add_log)
    {
       
$phpbb_log->add('admin', $user->data['user_id'], $user->ip, 'LOG_FORUM_COPIED_PERMISSIONS', false, array($src_forum_name, implode(', ', $dest_forum_names)));
    }

   
$db->sql_transaction('commit');

    return
true;
}

/**
* Get physical file listing
*/
function filelist($rootdir, $dir = '', $type = 'gif|jpg|jpeg|png|svg|webp')
{
   
$matches = array($dir => array());

   
// Remove initial / if present
   
$rootdir = (substr($rootdir, 0, 1) == '/') ? substr($rootdir, 1) : $rootdir;
   
// Add closing / if not present
   
$rootdir = ($rootdir && substr($rootdir, -1) != '/') ? $rootdir . '/' : $rootdir;

   
// Remove initial / if present
   
$dir = (substr($dir, 0, 1) == '/') ? substr($dir, 1) : $dir;
   
// Add closing / if not present
   
$dir = ($dir && substr($dir, -1) != '/') ? $dir . '/' : $dir;

    if (!
is_dir($rootdir . $dir))
    {
        return
$matches;
    }

   
$dh = @opendir($rootdir . $dir);

    if (!
$dh)
    {
        return
$matches;
    }

    while ((
$fname = readdir($dh)) !== false)
    {
        if (
is_file("$rootdir$dir$fname"))
        {
            if (
filesize("$rootdir$dir$fname") && preg_match('#\.' . $type . '$#i', $fname))
            {
               
$matches[$dir][] = $fname;
            }
        }
        else if (
$fname[0] != '.' && is_dir("$rootdir$dir$fname"))
        {
           
$matches += filelist($rootdir, "$dir$fname", $type);
        }
    }
   
closedir($dh);

    return
$matches;
}

/**
* Move topic(s)
*/
function move_topics($topic_ids, $forum_id, $auto_sync = true)
{
    global
$db, $phpbb_dispatcher;

    if (empty(
$topic_ids))
    {
        return;
    }

   
$forum_ids = array($forum_id);

    if (!
is_array($topic_ids))
    {
       
$topic_ids = array($topic_ids);
    }

   
/**
     * Perform additional actions before topics move
     *
     * @event core.move_topics_before
     * @var    array    topic_ids    Array of the moved topic ids
     * @var    string    forum_id    The forum id from where the topics are moved
     * @since 3.2.9-RC1
     */
   
$vars = array(
       
'topic_ids',
       
'forum_id',
    );
   
extract($phpbb_dispatcher->trigger_event('core.move_topics_before', compact($vars)));

   
$sql = 'DELETE FROM ' . TOPICS_TABLE . '
        WHERE '
. $db->sql_in_set('topic_moved_id', $topic_ids) . '
            AND forum_id = '
. $forum_id;
   
$db->sql_query($sql);

    if (
$auto_sync)
    {
       
$sql = 'SELECT DISTINCT forum_id
            FROM '
. TOPICS_TABLE . '
            WHERE '
. $db->sql_in_set('topic_id', $topic_ids);
       
$result = $db->sql_query($sql);

        while (
$row = $db->sql_fetchrow($result))
        {
           
$forum_ids[] = $row['forum_id'];
        }
       
$db->sql_freeresult($result);
    }

   
$table_ary = array(TOPICS_TABLE, POSTS_TABLE, LOG_TABLE, DRAFTS_TABLE, TOPICS_TRACK_TABLE);

   
/**
     * Perform additional actions before topics move
     *
     * @event core.move_topics_before_query
     * @var    array    table_ary    Array of tables from which forum_id will be updated for all rows that hold the moved topics
     * @var    array    topic_ids    Array of the moved topic ids
     * @var    string    forum_id    The forum id from where the topics are moved
     * @var    array    forum_ids    Array of the forums where the topics are moving (includes also forum_id)
     * @var bool    auto_sync    Whether or not to perform auto sync
     * @since 3.1.5-RC1
     */
   
$vars = array(
           
'table_ary',
           
'topic_ids',
           
'forum_id',
           
'forum_ids',
           
'auto_sync',
    );
   
extract($phpbb_dispatcher->trigger_event('core.move_topics_before_query', compact($vars)));

    foreach (
$table_ary as $table)
    {
       
$sql = "UPDATE $table
            SET forum_id =
$forum_id
            WHERE "
. $db->sql_in_set('topic_id', $topic_ids);
       
$db->sql_query($sql);
    }
    unset(
$table_ary);

   
/**
     * Perform additional actions after topics move
     *
     * @event core.move_topics_after
     * @var    array    topic_ids    Array of the moved topic ids
     * @var    string    forum_id    The forum id from where the topics were moved
     * @var    array    forum_ids    Array of the forums where the topics were moved (includes also forum_id)
     * @since 3.2.9-RC1
     */
   
$vars = array(
       
'topic_ids',
       
'forum_id',
       
'forum_ids',
    );
   
extract($phpbb_dispatcher->trigger_event('core.move_topics_after', compact($vars)));

    if (
$auto_sync)
    {
       
sync('forum', 'forum_id', $forum_ids, true, true);
        unset(
$forum_ids);
    }
}

/**
* Move post(s)
*/
function move_posts($post_ids, $topic_id, $auto_sync = true)
{
    global
$db, $phpbb_dispatcher;

    if (!
is_array($post_ids))
    {
       
$post_ids = array($post_ids);
    }

   
$forum_ids = array();
   
$topic_ids = array($topic_id);

   
$sql = 'SELECT DISTINCT topic_id, forum_id
        FROM '
. POSTS_TABLE . '
        WHERE '
. $db->sql_in_set('post_id', $post_ids);
   
$result = $db->sql_query($sql);

    while (
$row = $db->sql_fetchrow($result))
    {
       
$forum_ids[] = (int) $row['forum_id'];
       
$topic_ids[] = (int) $row['topic_id'];
    }
   
$db->sql_freeresult($result);

   
$sql = 'SELECT forum_id
        FROM '
. TOPICS_TABLE . '
        WHERE topic_id = '
. $topic_id;
   
$result = $db->sql_query($sql);
   
$forum_row = $db->sql_fetchrow($result);
   
$db->sql_freeresult($result);

    if (!
$forum_row)
    {
       
trigger_error('NO_TOPIC');
    }

   
/**
     * Perform additional actions before moving posts
     *
     * @event core.move_posts_before
     * @var    array    post_ids    Array of post ids to move
     * @var    int        topic_id    The topic id the posts are moved to
     * @var    bool    auto_sync    Whether or not to perform auto sync
     * @var    array    forum_ids    Array of the forum ids the posts are moved from
     * @var    array    topic_ids    Array of the topic ids the posts are moved from
     * @var    array    forum_row    Array with the forum id of the topic the posts are moved to
     * @since 3.1.7-RC1
     */
   
$vars = array(
           
'post_ids',
           
'topic_id',
           
'auto_sync',
           
'forum_ids',
           
'topic_ids',
           
'forum_row',
    );
   
extract($phpbb_dispatcher->trigger_event('core.move_posts_before', compact($vars)));

   
$sql = 'UPDATE ' . POSTS_TABLE . '
        SET forum_id = '
. (int) $forum_row['forum_id'] . ", topic_id = $topic_id
        WHERE "
. $db->sql_in_set('post_id', $post_ids);
   
$db->sql_query($sql);

   
$sql = 'UPDATE ' . ATTACHMENTS_TABLE . "
        SET topic_id =
$topic_id, in_message = 0
        WHERE "
. $db->sql_in_set('post_msg_id', $post_ids);
   
$db->sql_query($sql);

   
/**
     * Perform additional actions after moving posts
     *
     * @event core.move_posts_after
     * @var    array    post_ids    Array of the moved post ids
     * @var    int        topic_id    The topic id the posts are moved to
     * @var    bool    auto_sync    Whether or not to perform auto sync
     * @var    array    forum_ids    Array of the forum ids the posts are moved from
     * @var    array    topic_ids    Array of the topic ids the posts are moved from
     * @var    array    forum_row    Array with the forum id of the topic the posts are moved to
     * @since 3.1.7-RC1
     */
   
$vars = array(
           
'post_ids',
           
'topic_id',
           
'auto_sync',
           
'forum_ids',
           
'topic_ids',
           
'forum_row',
    );
   
extract($phpbb_dispatcher->trigger_event('core.move_posts_after', compact($vars)));

    if (
$auto_sync)
    {
       
$forum_ids[] = (int) $forum_row['forum_id'];

       
sync('topic_reported', 'topic_id', $topic_ids);
       
sync('topic_attachment', 'topic_id', $topic_ids);
       
sync('topic', 'topic_id', $topic_ids, true);
       
sync('forum', 'forum_id', $forum_ids, true, true);

       
/**
         * Perform additional actions after move post sync
         *
         * @event core.move_posts_sync_after
         * @var    array    post_ids    Array of the moved post ids
         * @var    int        topic_id    The topic id the posts are moved to
         * @var    bool    auto_sync    Whether or not to perform auto sync
         * @var    array    forum_ids    Array of the forum ids the posts are moved from
         * @var    array    topic_ids    Array of the topic ids the posts are moved from
         * @var    array    forum_row    Array with the forum id of the topic the posts are moved to
         * @since 3.1.11-RC1
         */
       
$vars = array(
           
'post_ids',
           
'topic_id',
           
'auto_sync',
           
'forum_ids',
           
'topic_ids',
           
'forum_row',
        );
       
extract($phpbb_dispatcher->trigger_event('core.move_posts_sync_after', compact($vars)));
    }

   
// Update posted information
   
update_posted_info($topic_ids);
}

/**
* Remove topic(s)
*/
function delete_topics($where_type, $where_ids, $auto_sync = true, $post_count_sync = true, $call_delete_posts = true)
{
    global
$db, $config, $phpbb_container, $phpbb_dispatcher;

   
$approved_topics = 0;
   
$forum_ids = $topic_ids = array();

    if (
$where_type === 'range')
    {
       
$where_clause = $where_ids;
    }
    else
    {
       
$where_ids = (is_array($where_ids)) ? array_unique($where_ids) : array($where_ids);

        if (!
count($where_ids))
        {
            return array(
'topics' => 0, 'posts' => 0);
        }

       
$where_clause = $db->sql_in_set($where_type, $where_ids);
    }

   
// Making sure that delete_posts does not call delete_topics again...
   
$return = array(
       
'posts' => ($call_delete_posts) ? delete_posts($where_type, $where_ids, false, true, $post_count_sync, false) : 0,
    );

   
$sql = 'SELECT topic_id, forum_id, topic_visibility, topic_moved_id
        FROM '
. TOPICS_TABLE . '
        WHERE '
. $where_clause;
   
$result = $db->sql_query($sql);

    while (
$row = $db->sql_fetchrow($result))
    {
       
$forum_ids[] = $row['forum_id'];
       
$topic_ids[] = $row['topic_id'];

        if (
$row['topic_visibility'] == ITEM_APPROVED && !$row['topic_moved_id'])
        {
           
$approved_topics++;
        }
    }
   
$db->sql_freeresult($result);

   
$return['topics'] = count($topic_ids);

    if (!
count($topic_ids))
    {
        return
$return;
    }

   
$db->sql_transaction('begin');

   
$table_ary = array(BOOKMARKS_TABLE, TOPICS_TRACK_TABLE, TOPICS_POSTED_TABLE, POLL_VOTES_TABLE, POLL_OPTIONS_TABLE, TOPICS_WATCH_TABLE, TOPICS_TABLE);

   
/**
     * Perform additional actions before topic(s) deletion
     *
     * @event core.delete_topics_before_query
     * @var    array    table_ary    Array of tables from which all rows will be deleted that hold a topic_id occuring in topic_ids
     * @var    array    topic_ids    Array of topic ids to delete
     * @since 3.1.4-RC1
     */
   
$vars = array(
           
'table_ary',
           
'topic_ids',
    );
   
extract($phpbb_dispatcher->trigger_event('core.delete_topics_before_query', compact($vars)));

    foreach (
$table_ary as $table)
    {
       
$sql = "DELETE FROM $table
            WHERE "
. $db->sql_in_set('topic_id', $topic_ids);
       
$db->sql_query($sql);
    }
    unset(
$table_ary);

   
/**
     * Perform additional actions after topic(s) deletion
     *
     * @event core.delete_topics_after_query
     * @var    array    topic_ids    Array of topic ids that were deleted
     * @since 3.1.4-RC1
     */
   
$vars = array(
           
'topic_ids',
    );
   
extract($phpbb_dispatcher->trigger_event('core.delete_topics_after_query', compact($vars)));

   
$moved_topic_ids = array();

   
// update the other forums
   
$sql = 'SELECT topic_id, forum_id
        FROM '
. TOPICS_TABLE . '
        WHERE '
. $db->sql_in_set('topic_moved_id', $topic_ids);
   
$result = $db->sql_query($sql);

    while (
$row = $db->sql_fetchrow($result))
    {
       
$forum_ids[] = $row['forum_id'];
       
$moved_topic_ids[] = $row['topic_id'];
    }
   
$db->sql_freeresult($result);

    if (
count($moved_topic_ids))
    {
       
$sql = 'DELETE FROM ' . TOPICS_TABLE . '
            WHERE '
. $db->sql_in_set('topic_id', $moved_topic_ids);
       
$db->sql_query($sql);
    }

   
$db->sql_transaction('commit');

    if (
$auto_sync)
    {
       
sync('forum', 'forum_id', array_unique($forum_ids), true, true);
       
sync('topic_reported', $where_type, $where_ids);
    }

    if (
$approved_topics)
    {
       
$config->increment('num_topics', $approved_topics * (-1), false);
    }

   
/* @var $phpbb_notifications \phpbb\notification\manager */
   
$phpbb_notifications = $phpbb_container->get('notification_manager');

   
$phpbb_notifications->delete_notifications(array(
       
'notification.type.topic',
       
'notification.type.approve_topic',
       
'notification.type.topic_in_queue',
    ),
$topic_ids);

    return
$return;
}

/**
* Remove post(s)
*/
function delete_posts($where_type, $where_ids, $auto_sync = true, $posted_sync = true, $post_count_sync = true, $call_delete_topics = true)
{
    global
$db, $config, $phpbb_root_path, $phpEx, $auth, $user, $phpbb_container, $phpbb_dispatcher;

   
// Notifications types to delete
   
$delete_notifications_types = array(
       
'notification.type.quote',
       
'notification.type.approve_post',
       
'notification.type.post_in_queue',
       
'notification.type.report_post',
    );

   
/**
    * Perform additional actions before post(s) deletion
    *
    * @event core.delete_posts_before
    * @var    string    where_type                    Variable containing posts deletion mode
    * @var    mixed    where_ids                    Array or comma separated list of posts ids to delete
    * @var    bool    auto_sync                    Flag indicating if topics/forums should be synchronized
    * @var    bool    posted_sync                    Flag indicating if topics_posted table should be resynchronized
    * @var    bool    post_count_sync                Flag indicating if posts count should be resynchronized
    * @var    bool    call_delete_topics            Flag indicating if topics having no posts should be deleted
    * @var    array    delete_notifications_types    Array with notifications types to delete
    * @since 3.1.0-a4
    */
   
$vars = array(
       
'where_type',
       
'where_ids',
       
'auto_sync',
       
'posted_sync',
       
'post_count_sync',
       
'call_delete_topics',
       
'delete_notifications_types',
    );
   
extract($phpbb_dispatcher->trigger_event('core.delete_posts_before', compact($vars)));

    if (
$where_type === 'range')
    {
       
$where_clause = $where_ids;
    }
    else
    {
        if (
is_array($where_ids))
        {
           
$where_ids = array_unique($where_ids);
        }
        else
        {
           
$where_ids = array($where_ids);
        }

        if (!
count($where_ids))
        {
            return
false;
        }

       
$where_ids = array_map('intval', $where_ids);

/*        Possible code for splitting post deletion
        if (count($where_ids) >= 1001)
        {
            // Split into chunks of 1000
            $chunks = array_chunk($where_ids, 1000);

            foreach ($chunks as $_where_ids)
            {
                delete_posts($where_type, $_where_ids, $auto_sync, $posted_sync, $post_count_sync, $call_delete_topics);
            }

            return;
        }*/

       
$where_clause = $db->sql_in_set($where_type, $where_ids);
    }

   
$approved_posts = 0;
   
$post_ids = $topic_ids = $forum_ids = $post_counts = $remove_topics = array();

   
$sql = 'SELECT post_id, poster_id, post_visibility, post_postcount, topic_id, forum_id
        FROM '
. POSTS_TABLE . '
        WHERE '
. $where_clause;
   
$result = $db->sql_query($sql);

    while (
$row = $db->sql_fetchrow($result))
    {
       
$post_ids[] = (int) $row['post_id'];
       
$poster_ids[] = (int) $row['poster_id'];
       
$topic_ids[] = (int) $row['topic_id'];
       
$forum_ids[] = (int) $row['forum_id'];

        if (
$row['post_postcount'] && $post_count_sync && $row['post_visibility'] == ITEM_APPROVED)
        {
           
$post_counts[$row['poster_id']] = (!empty($post_counts[$row['poster_id']])) ? $post_counts[$row['poster_id']] + 1 : 1;
        }

        if (
$row['post_visibility'] == ITEM_APPROVED)
        {
           
$approved_posts++;
        }
    }
   
$db->sql_freeresult($result);

    if (!
count($post_ids))
    {
        return
false;
    }

   
$db->sql_transaction('begin');

   
$table_ary = array(POSTS_TABLE, REPORTS_TABLE);

   
/**
    * Perform additional actions during post(s) deletion before running the queries
    *
    * @event core.delete_posts_in_transaction_before
    * @var    array    post_ids                    Array with deleted posts' ids
    * @var    array    poster_ids                    Array with deleted posts' author ids
    * @var    array    topic_ids                    Array with deleted posts' topic ids
    * @var    array    forum_ids                    Array with deleted posts' forum ids
    * @var    string    where_type                    Variable containing posts deletion mode
    * @var    mixed    where_ids                    Array or comma separated list of post ids to delete
    * @var    array    delete_notifications_types    Array with notifications types to delete
    * @var    array    table_ary                    Array with table names to delete data from
    * @since 3.1.7-RC1
    */
   
$vars = array(
       
'post_ids',
       
'poster_ids',
       
'topic_ids',
       
'forum_ids',
       
'where_type',
       
'where_ids',
       
'delete_notifications_types',
       
'table_ary',
    );
   
extract($phpbb_dispatcher->trigger_event('core.delete_posts_in_transaction_before', compact($vars)));

    foreach (
$table_ary as $table)
    {
       
$sql = "DELETE FROM $table
            WHERE "
. $db->sql_in_set('post_id', $post_ids);
       
$db->sql_query($sql);
    }
    unset(
$table_ary);

   
// Adjust users post counts
   
if (count($post_counts) && $post_count_sync)
    {
        foreach (
$post_counts as $poster_id => $substract)
        {
           
$sql = 'UPDATE ' . USERS_TABLE . '
                SET user_posts = 0
                WHERE user_id = '
. $poster_id . '
                AND user_posts < '
. $substract;
           
$db->sql_query($sql);

           
$sql = 'UPDATE ' . USERS_TABLE . '
                SET user_posts = user_posts - '
. $substract . '
                WHERE user_id = '
. $poster_id . '
                AND user_posts >= '
. $substract;
           
$db->sql_query($sql);
        }
    }

   
// Remove topics now having no posts?
   
if (count($topic_ids))
    {
       
$sql = 'SELECT topic_id
            FROM '
. POSTS_TABLE . '
            WHERE '
. $db->sql_in_set('topic_id', $topic_ids) . '
            GROUP BY topic_id'
;
       
$result = $db->sql_query($sql);

        while (
$row = $db->sql_fetchrow($result))
        {
           
$remove_topics[] = $row['topic_id'];
        }
       
$db->sql_freeresult($result);

       
// Actually, those not within remove_topics should be removed. ;)
       
$remove_topics = array_diff($topic_ids, $remove_topics);
    }

   
// Remove the message from the search index
   
$search_type = $config['search_type'];

    if (!
class_exists($search_type))
    {
       
trigger_error('NO_SUCH_SEARCH_MODULE');
    }

   
$error = false;
   
$search = new $search_type($error, $phpbb_root_path, $phpEx, $auth, $config, $db, $user, $phpbb_dispatcher);

    if (
$error)
    {
       
trigger_error($error);
    }

   
$search->index_remove($post_ids, $poster_ids, $forum_ids);

   
/** @var \phpbb\attachment\manager $attachment_manager */
   
$attachment_manager = $phpbb_container->get('attachment.manager');
   
$attachment_manager->delete('post', $post_ids, false);
    unset(
$attachment_manager);

   
/**
    * Perform additional actions during post(s) deletion
    *
    * @event core.delete_posts_in_transaction
    * @var    array    post_ids                    Array with deleted posts' ids
    * @var    array    poster_ids                    Array with deleted posts' author ids
    * @var    array    topic_ids                    Array with deleted posts' topic ids
    * @var    array    forum_ids                    Array with deleted posts' forum ids
    * @var    string    where_type                    Variable containing posts deletion mode
    * @var    mixed    where_ids                    Array or comma separated list of posts ids to delete
    * @var    array    delete_notifications_types    Array with notifications types to delete
    * @since 3.1.0-a4
    */
   
$vars = array(
       
'post_ids',
       
'poster_ids',
       
'topic_ids',
       
'forum_ids',
       
'where_type',
       
'where_ids',
       
'delete_notifications_types',
    );
   
extract($phpbb_dispatcher->trigger_event('core.delete_posts_in_transaction', compact($vars)));

   
$db->sql_transaction('commit');

   
/**
    * Perform additional actions after post(s) deletion
    *
    * @event core.delete_posts_after
    * @var    array    post_ids                    Array with deleted posts' ids
    * @var    array    poster_ids                    Array with deleted posts' author ids
    * @var    array    topic_ids                    Array with deleted posts' topic ids
    * @var    array    forum_ids                    Array with deleted posts' forum ids
    * @var    string    where_type                    Variable containing posts deletion mode
    * @var    mixed    where_ids                    Array or comma separated list of posts ids to delete
    * @var    array    delete_notifications_types    Array with notifications types to delete
    * @since 3.1.0-a4
    */
   
$vars = array(
       
'post_ids',
       
'poster_ids',
       
'topic_ids',
       
'forum_ids',
       
'where_type',
       
'where_ids',
       
'delete_notifications_types',
    );
   
extract($phpbb_dispatcher->trigger_event('core.delete_posts_after', compact($vars)));

   
// Resync topics_posted table
   
if ($posted_sync)
    {
       
update_posted_info($topic_ids);
    }

    if (
$auto_sync)
    {
       
sync('topic_reported', 'topic_id', $topic_ids);
       
sync('topic', 'topic_id', $topic_ids, true);
       
sync('forum', 'forum_id', $forum_ids, true, true);
    }

    if (
$approved_posts && $post_count_sync)
    {
       
$config->increment('num_posts', $approved_posts * (-1), false);
    }

   
// We actually remove topics now to not be inconsistent (the delete_topics function calls this function too)
   
if (count($remove_topics) && $call_delete_topics)
    {
       
delete_topics('topic_id', $remove_topics, $auto_sync, $post_count_sync, false);
    }

   
/* @var $phpbb_notifications \phpbb\notification\manager */
   
$phpbb_notifications = $phpbb_container->get('notification_manager');

   
$phpbb_notifications->delete_notifications($delete_notifications_types, $post_ids);

    return
count($post_ids);
}

/**
* Deletes shadow topics pointing to a specified forum.
*
* @param int        $forum_id        The forum id
* @param string        $sql_more        Additional WHERE statement, e.g. t.topic_time < (time() - 1234)
* @param bool        $auto_sync        Will call sync() if this is true
*
* @return array        Array with affected forums
*/
function delete_topic_shadows($forum_id, $sql_more = '', $auto_sync = true)
{
    global
$db;

    if (!
$forum_id)
    {
       
// Nothing to do.
       
return;
    }

   
// Set of affected forums we have to resync
   
$sync_forum_ids = array();

   
// Amount of topics we select and delete at once.
   
$batch_size = 500;

    do
    {
       
$sql = 'SELECT t2.forum_id, t2.topic_id
            FROM '
. TOPICS_TABLE . ' t2, ' . TOPICS_TABLE . ' t
            WHERE t2.topic_moved_id = t.topic_id
                AND t.forum_id = '
. (int) $forum_id . '
                '
. (($sql_more) ? 'AND ' . $sql_more : '');
       
$result = $db->sql_query_limit($sql, $batch_size);

       
$topic_ids = array();
        while (
$row = $db->sql_fetchrow($result))
        {
           
$topic_ids[] = (int) $row['topic_id'];

           
$sync_forum_ids[(int) $row['forum_id']] = (int) $row['forum_id'];
        }
       
$db->sql_freeresult($result);

        if (!empty(
$topic_ids))
        {
           
$sql = 'DELETE FROM ' . TOPICS_TABLE . '
                WHERE '
. $db->sql_in_set('topic_id', $topic_ids);
           
$db->sql_query($sql);
        }
    }
    while (
count($topic_ids) == $batch_size);

    if (
$auto_sync)
    {
       
sync('forum', 'forum_id', $sync_forum_ids, true, true);
    }

    return
$sync_forum_ids;
}

/**
* Update/Sync posted information for topics
*/
function update_posted_info(&$topic_ids)
{
    global
$db, $config;

    if (empty(
$topic_ids) || !$config['load_db_track'])
    {
        return;
    }

   
// First of all, let us remove any posted information for these topics
   
$sql = 'DELETE FROM ' . TOPICS_POSTED_TABLE . '
        WHERE '
. $db->sql_in_set('topic_id', $topic_ids);
   
$db->sql_query($sql);

   
// Now, let us collect the user/topic combos for rebuilding the information
   
$sql = 'SELECT poster_id, topic_id
        FROM '
. POSTS_TABLE . '
        WHERE '
. $db->sql_in_set('topic_id', $topic_ids) . '
            AND poster_id <> '
. ANONYMOUS . '
        GROUP BY poster_id, topic_id'
;
   
$result = $db->sql_query($sql);

   
$posted = array();
    while (
$row = $db->sql_fetchrow($result))
    {
       
// Add as key to make them unique (grouping by) and circumvent empty keys on array_unique
       
$posted[$row['poster_id']][] = $row['topic_id'];
    }
   
$db->sql_freeresult($result);

   
// Now add the information...
   
$sql_ary = array();
    foreach (
$posted as $user_id => $topic_row)
    {
        foreach (
$topic_row as $topic_id)
        {
           
$sql_ary[] = array(
               
'user_id'        => (int) $user_id,
               
'topic_id'        => (int) $topic_id,
               
'topic_posted'    => 1,
            );
        }
    }
    unset(
$posted);

   
$db->sql_multi_insert(TOPICS_POSTED_TABLE, $sql_ary);
}

/**
* All-encompasing sync function
*
* Exaples:
* <code>
* sync('topic', 'topic_id', 123);            // resync topic #123
* sync('topic', 'forum_id', array(2, 3));    // resync topics from forum #2 and #3
* sync('topic');                            // resync all topics
* sync('topic', 'range', 'topic_id BETWEEN 1 AND 60');    // resync a range of topics/forums (only available for 'topic' and 'forum' modes)
* </code>
*
* Modes:
* - forum                Resync complete forum
* - topic                Resync topics
* - topic_moved            Removes topic shadows that would be in the same forum as the topic they link to
* - topic_visibility    Resyncs the topic_visibility flag according to the status of the first post
* - post_reported        Resyncs the post_reported flag, relying on actual reports
* - topic_reported        Resyncs the topic_reported flag, relying on post_reported flags
* - post_attachement    Same as post_reported, but with attachment flags
* - topic_attachement    Same as topic_reported, but with attachment flags
*/
function sync($mode, $where_type = '', $where_ids = '', $resync_parents = false, $sync_extra = false)
{
    global
$db, $phpbb_dispatcher;

    if (
is_array($where_ids))
    {
       
$where_ids = array_unique($where_ids);
       
$where_ids = array_map('intval', $where_ids);
    }
    else if (
$where_type != 'range')
    {
       
$where_ids = ($where_ids) ? array((int) $where_ids) : array();
    }

    if (
$mode == 'forum' || $mode == 'topic' || $mode == 'topic_visibility' || $mode == 'topic_reported' || $mode == 'post_reported')
    {
        if (!
$where_type)
        {
           
$where_sql = '';
           
$where_sql_and = 'WHERE';
        }
        else if (
$where_type == 'range')
        {
           
// Only check a range of topics/forums. For instance: 'topic_id BETWEEN 1 AND 60'
           
$where_sql = 'WHERE (' . $mode[0] . ".$where_ids)";
           
$where_sql_and = $where_sql . "\n\tAND";
        }
        else
        {
           
// Do not sync the "global forum"
           
$where_ids = array_diff($where_ids, array(0));

            if (!
count($where_ids))
            {
               
// Empty array with IDs. This means that we don't have any work to do. Just return.
               
return;
            }

           
// Limit the topics/forums we are syncing, use specific topic/forum IDs.
            // $where_type contains the field for the where clause (forum_id, topic_id)
           
$where_sql = 'WHERE ' . $db->sql_in_set($mode[0] . '.' . $where_type, $where_ids);
           
$where_sql_and = $where_sql . "\n\tAND";
        }
    }
    else
    {
        if (!
count($where_ids))
        {
            return;
        }

       
// $where_type contains the field for the where clause (forum_id, topic_id)
       
$where_sql = 'WHERE ' . $db->sql_in_set($mode[0] . '.' . $where_type, $where_ids);
       
$where_sql_and = $where_sql . "\n\tAND";
    }

    switch (
$mode)
    {
        case
'topic_moved':
           
$db->sql_transaction('begin');
            switch (
$db->get_sql_layer())
            {
                case
'mysqli':
                   
$sql = 'DELETE FROM ' . TOPICS_TABLE . '
                        USING '
. TOPICS_TABLE . ' t1, ' . TOPICS_TABLE . " t2
                        WHERE t1.topic_moved_id = t2.topic_id
                            AND t1.forum_id = t2.forum_id"
;
                   
$db->sql_query($sql);
                break;

                default:
                   
$sql = 'SELECT t1.topic_id
                        FROM '
.TOPICS_TABLE . ' t1, ' . TOPICS_TABLE . " t2
                        WHERE t1.topic_moved_id = t2.topic_id
                            AND t1.forum_id = t2.forum_id"
;
                   
$result = $db->sql_query($sql);

                   
$topic_id_ary = array();
                    while (
$row = $db->sql_fetchrow($result))
                    {
                       
$topic_id_ary[] = $row['topic_id'];
                    }
                   
$db->sql_freeresult($result);

                    if (!
count($topic_id_ary))
                    {
                        return;
                    }

                   
$sql = 'DELETE FROM ' . TOPICS_TABLE . '
                        WHERE '
. $db->sql_in_set('topic_id', $topic_id_ary);
                   
$db->sql_query($sql);

                break;
            }

           
$db->sql_transaction('commit');
            break;

        case
'topic_visibility':

           
$db->sql_transaction('begin');

           
$sql = 'SELECT t.topic_id, p.post_visibility
                FROM '
. TOPICS_TABLE . ' t, ' . POSTS_TABLE . " p
               
$where_sql_and p.topic_id = t.topic_id
                    AND p.post_visibility = "
. ITEM_APPROVED;
           
$result = $db->sql_query($sql);

           
$topics_approved = array();
            while (
$row = $db->sql_fetchrow($result))
            {
               
$topics_approved[] = (int) $row['topic_id'];
            }
           
$db->sql_freeresult($result);

           
$sql = 'SELECT t.topic_id, p.post_visibility
                FROM '
. TOPICS_TABLE . ' t, ' . POSTS_TABLE . " p
               
$where_sql_and " . $db->sql_in_set('t.topic_id', $topics_approved, true, true) . '
                    AND p.topic_id = t.topic_id
                    AND p.post_visibility = '
. ITEM_DELETED;
           
$result = $db->sql_query($sql);

           
$topics_softdeleted = array();
            while (
$row = $db->sql_fetchrow($result))
            {
               
$topics_softdeleted[] = (int) $row['topic_id'];
            }
           
$db->sql_freeresult($result);

           
$topics_softdeleted = array_diff($topics_softdeleted, $topics_approved);
           
$topics_not_unapproved = array_merge($topics_softdeleted, $topics_approved);

           
$update_ary = array(
               
ITEM_UNAPPROVED    => (!empty($topics_not_unapproved)) ? $where_sql_and . ' ' . $db->sql_in_set('topic_id', $topics_not_unapproved, true) : '',
               
ITEM_APPROVED    => (!empty($topics_approved)) ? ' WHERE ' . $db->sql_in_set('topic_id', $topics_approved) : '',
               
ITEM_DELETED    => (!empty($topics_softdeleted)) ? ' WHERE ' . $db->sql_in_set('topic_id', $topics_softdeleted) : '',
            );

            foreach (
$update_ary as $visibility => $sql_where)
            {
                if (
$sql_where)
                {
                   
$sql = 'UPDATE ' . TOPICS_TABLE . '
                        SET topic_visibility = '
. $visibility . '
                        '
. $sql_where;
                   
$db->sql_query($sql);
                }
            }

           
$db->sql_transaction('commit');
            break;

        case
'post_reported':
           
$post_ids = $post_reported = array();

           
$db->sql_transaction('begin');

           
$sql = 'SELECT p.post_id, p.post_reported
                FROM '
. POSTS_TABLE . " p
               
$where_sql
                GROUP BY p.post_id, p.post_reported"
;
           
$result = $db->sql_query($sql);

            while (
$row = $db->sql_fetchrow($result))
            {
               
$post_ids[$row['post_id']] = $row['post_id'];
                if (
$row['post_reported'])
                {
                   
$post_reported[$row['post_id']] = 1;
                }
            }
           
$db->sql_freeresult($result);

           
$sql = 'SELECT DISTINCT(post_id)
                FROM '
. REPORTS_TABLE . '
                WHERE '
. $db->sql_in_set('post_id', $post_ids) . '
                    AND report_closed = 0'
;
           
$result = $db->sql_query($sql);

           
$post_ids = array();
            while (
$row = $db->sql_fetchrow($result))
            {
                if (!isset(
$post_reported[$row['post_id']]))
                {
                   
$post_ids[] = $row['post_id'];
                }
                else
                {
                    unset(
$post_reported[$row['post_id']]);
                }
            }
           
$db->sql_freeresult($result);

           
// $post_reported should be empty by now, if it's not it contains
            // posts that are falsely flagged as reported
           
foreach ($post_reported as $post_id => $void)
            {
               
$post_ids[] = $post_id;
            }

            if (
count($post_ids))
            {
               
$sql = 'UPDATE ' . POSTS_TABLE . '
                    SET post_reported = 1 - post_reported
                    WHERE '
. $db->sql_in_set('post_id', $post_ids);
               
$db->sql_query($sql);
            }

           
$db->sql_transaction('commit');
            break;

        case
'topic_reported':
            if (
$sync_extra)
            {
               
sync('post_reported', $where_type, $where_ids);
            }

           
$topic_ids = $topic_reported = array();

           
$db->sql_transaction('begin');

           
$sql = 'SELECT DISTINCT(t.topic_id)
                FROM '
. POSTS_TABLE . " t
               
$where_sql_and t.post_reported = 1";
           
$result = $db->sql_query($sql);

            while (
$row = $db->sql_fetchrow($result))
            {
               
$topic_reported[$row['topic_id']] = 1;
            }
           
$db->sql_freeresult($result);

           
$sql = 'SELECT t.topic_id, t.topic_reported
                FROM '
. TOPICS_TABLE . " t
               
$where_sql";
           
$result = $db->sql_query($sql);

            while (
$row = $db->sql_fetchrow($result))
            {
                if (
$row['topic_reported'] ^ isset($topic_reported[$row['topic_id']]))
                {
                   
$topic_ids[] = $row['topic_id'];
                }
            }
           
$db->sql_freeresult($result);

            if (
count($topic_ids))
            {
               
$sql = 'UPDATE ' . TOPICS_TABLE . '
                    SET topic_reported = 1 - topic_reported
                    WHERE '
. $db->sql_in_set('topic_id', $topic_ids);
               
$db->sql_query($sql);
            }

           
$db->sql_transaction('commit');
            break;

        case
'post_attachment':
           
$post_ids = $post_attachment = array();

           
$db->sql_transaction('begin');

           
$sql = 'SELECT p.post_id, p.post_attachment
                FROM '
. POSTS_TABLE . " p
               
$where_sql
                GROUP BY p.post_id, p.post_attachment"
;
           
$result = $db->sql_query($sql);

            while (
$row = $db->sql_fetchrow($result))
            {
               
$post_ids[$row['post_id']] = $row['post_id'];
                if (
$row['post_attachment'])
                {
                   
$post_attachment[$row['post_id']] = 1;
                }
            }
           
$db->sql_freeresult($result);

           
$sql = 'SELECT DISTINCT(post_msg_id)
                FROM '
. ATTACHMENTS_TABLE . '
                WHERE '
. $db->sql_in_set('post_msg_id', $post_ids) . '
                    AND in_message = 0'
;
           
$result = $db->sql_query($sql);

           
$post_ids = array();
            while (
$row = $db->sql_fetchrow($result))
            {
                if (!isset(
$post_attachment[$row['post_msg_id']]))
                {
                   
$post_ids[] = $row['post_msg_id'];
                }
                else
                {
                    unset(
$post_attachment[$row['post_msg_id']]);
                }
            }
           
$db->sql_freeresult($result);

           
// $post_attachment should be empty by now, if it's not it contains
            // posts that are falsely flagged as having attachments
           
foreach ($post_attachment as $post_id => $void)
            {
               
$post_ids[] = $post_id;
            }

            if (
count($post_ids))
            {
               
$sql = 'UPDATE ' . POSTS_TABLE . '
                    SET post_attachment = 1 - post_attachment
                    WHERE '
. $db->sql_in_set('post_id', $post_ids);
               
$db->sql_query($sql);
            }

           
$db->sql_transaction('commit');
            break;

        case
'topic_attachment':
            if (
$sync_extra)
            {
               
sync('post_attachment', $where_type, $where_ids);
            }

           
$topic_ids = $topic_attachment = array();

           
$db->sql_transaction('begin');

           
$sql = 'SELECT DISTINCT(t.topic_id)
                FROM '
. POSTS_TABLE . " t
               
$where_sql_and t.post_attachment = 1";
           
$result = $db->sql_query($sql);

            while (
$row = $db->sql_fetchrow($result))
            {
               
$topic_attachment[$row['topic_id']] = 1;
            }
           
$db->sql_freeresult($result);

           
$sql = 'SELECT t.topic_id, t.topic_attachment
                FROM '
. TOPICS_TABLE . " t
               
$where_sql";
           
$result = $db->sql_query($sql);

            while (
$row = $db->sql_fetchrow($result))
            {
                if (
$row['topic_attachment'] ^ isset($topic_attachment[$row['topic_id']]))
                {
                   
$topic_ids[] = $row['topic_id'];
                }
            }
           
$db->sql_freeresult($result);

            if (
count($topic_ids))
            {
               
$sql = 'UPDATE ' . TOPICS_TABLE . '
                    SET topic_attachment = 1 - topic_attachment
                    WHERE '
. $db->sql_in_set('topic_id', $topic_ids);
               
$db->sql_query($sql);
            }

           
$db->sql_transaction('commit');

            break;

        case
'forum':

           
$db->sql_transaction('begin');

           
// 1: Get the list of all forums
           
$sql = 'SELECT f.*
                FROM '
. FORUMS_TABLE . " f
               
$where_sql";
           
$result = $db->sql_query($sql);

           
$forum_data = $forum_ids = $post_ids = $last_post_id = $post_info = array();
            while (
$row = $db->sql_fetchrow($result))
            {
                if (
$row['forum_type'] == FORUM_LINK)
                {
                    continue;
                }

               
$forum_id = (int) $row['forum_id'];
               
$forum_ids[$forum_id] = $forum_id;

               
$forum_data[$forum_id] = $row;
                if (
$sync_extra)
                {
                   
$forum_data[$forum_id]['posts_approved'] = 0;
                   
$forum_data[$forum_id]['posts_unapproved'] = 0;
                   
$forum_data[$forum_id]['posts_softdeleted'] = 0;
                   
$forum_data[$forum_id]['topics_approved'] = 0;
                   
$forum_data[$forum_id]['topics_unapproved'] = 0;
                   
$forum_data[$forum_id]['topics_softdeleted'] = 0;
                }
               
$forum_data[$forum_id]['last_post_id'] = 0;
               
$forum_data[$forum_id]['last_post_subject'] = '';
               
$forum_data[$forum_id]['last_post_time'] = 0;
               
$forum_data[$forum_id]['last_poster_id'] = 0;
               
$forum_data[$forum_id]['last_poster_name'] = '';
               
$forum_data[$forum_id]['last_poster_colour'] = '';
            }
           
$db->sql_freeresult($result);

            if (!
count($forum_ids))
            {
                break;
            }

           
$forum_ids = array_values($forum_ids);

           
// 2: Get topic counts for each forum (optional)
           
if ($sync_extra)
            {
               
$sql = 'SELECT forum_id, topic_visibility, COUNT(topic_id) AS total_topics
                    FROM '
. TOPICS_TABLE . '
                    WHERE '
. $db->sql_in_set('forum_id', $forum_ids) . '
                    GROUP BY forum_id, topic_visibility'
;
               
$result = $db->sql_query($sql);

                while (
$row = $db->sql_fetchrow($result))
                {
                   
$forum_id = (int) $row['forum_id'];

                    if (
$row['topic_visibility'] == ITEM_APPROVED)
                    {
                       
$forum_data[$forum_id]['topics_approved'] = $row['total_topics'];
                    }
                    else if (
$row['topic_visibility'] == ITEM_UNAPPROVED || $row['topic_visibility'] == ITEM_REAPPROVE)
                    {
                       
$forum_data[$forum_id]['topics_unapproved'] = $row['total_topics'];
                    }
                    else if (
$row['topic_visibility'] == ITEM_DELETED)
                    {
                       
$forum_data[$forum_id]['topics_softdeleted'] = $row['total_topics'];
                    }
                }
               
$db->sql_freeresult($result);
            }

           
// 3: Get post count for each forum (optional)
           
if ($sync_extra)
            {
                if (
count($forum_ids) == 1)
                {
                   
$sql = 'SELECT SUM(t.topic_posts_approved) AS forum_posts_approved, SUM(t.topic_posts_unapproved) AS forum_posts_unapproved, SUM(t.topic_posts_softdeleted) AS forum_posts_softdeleted
                        FROM '
. TOPICS_TABLE . ' t
                        WHERE '
. $db->sql_in_set('t.forum_id', $forum_ids) . '
                            AND t.topic_status <> '
. ITEM_MOVED;
                }
                else
                {
                   
$sql = 'SELECT t.forum_id, SUM(t.topic_posts_approved) AS forum_posts_approved, SUM(t.topic_posts_unapproved) AS forum_posts_unapproved, SUM(t.topic_posts_softdeleted) AS forum_posts_softdeleted
                        FROM '
. TOPICS_TABLE . ' t
                        WHERE '
. $db->sql_in_set('t.forum_id', $forum_ids) . '
                            AND t.topic_status <> '
. ITEM_MOVED . '
                        GROUP BY t.forum_id'
;
                }

               
$result = $db->sql_query($sql);

                while (
$row = $db->sql_fetchrow($result))
                {
                   
$forum_id = (count($forum_ids) == 1) ? (int) $forum_ids[0] : (int) $row['forum_id'];

                   
$forum_data[$forum_id]['posts_approved'] = (int) $row['forum_posts_approved'];
                   
$forum_data[$forum_id]['posts_unapproved'] = (int) $row['forum_posts_unapproved'];
                   
$forum_data[$forum_id]['posts_softdeleted'] = (int) $row['forum_posts_softdeleted'];
                }
               
$db->sql_freeresult($result);
            }

           
// 4: Get last_post_id for each forum
           
if (count($forum_ids) == 1)
            {
               
$sql = 'SELECT MAX(t.topic_last_post_id) as last_post_id
                    FROM '
. TOPICS_TABLE . ' t
                    WHERE '
. $db->sql_in_set('t.forum_id', $forum_ids) . '
                        AND t.topic_visibility = '
. ITEM_APPROVED;
            }
            else
            {
               
$sql = 'SELECT t.forum_id, MAX(t.topic_last_post_id) as last_post_id
                    FROM '
. TOPICS_TABLE . ' t
                    WHERE '
. $db->sql_in_set('t.forum_id', $forum_ids) . '
                        AND t.topic_visibility = '
. ITEM_APPROVED . '
                    GROUP BY t.forum_id'
;
            }

           
$result = $db->sql_query($sql);

            while (
$row = $db->sql_fetchrow($result))
            {
               
$forum_id = (count($forum_ids) == 1) ? (int) $forum_ids[0] : (int) $row['forum_id'];

               
$forum_data[$forum_id]['last_post_id'] = (int) $row['last_post_id'];

               
$post_ids[] = $row['last_post_id'];
            }
           
$db->sql_freeresult($result);

           
// 5: Retrieve last_post infos
           
if (count($post_ids))
            {
               
$sql_ary = array(
                   
'SELECT'    => 'p.post_id, p.poster_id, p.post_subject, p.post_time, p.post_username, u.username, u.user_colour',
                   
'FROM'        => array(
                       
POSTS_TABLE    => 'p',
                       
USERS_TABLE => 'u',
                    ),
                   
'WHERE'        => $db->sql_in_set('p.post_id', $post_ids) . '
                        AND p.poster_id = u.user_id'
,
                );

               
/**
                * Event to modify the SQL array to get the post and user data from all forums' last posts
                *
                * @event core.sync_forum_last_post_info_sql
                * @var    array    sql_ary        SQL array with some post and user data from the last posts list
                * @since 3.3.5-RC1
                */
               
$vars = ['sql_ary'];
               
extract($phpbb_dispatcher->trigger_event('core.sync_forum_last_post_info_sql', compact($vars)));
               
$result = $db->sql_query($db->sql_build_query('SELECT', $sql_ary));

                while (
$row = $db->sql_fetchrow($result))
                {
                   
$post_info[$row['post_id']] = $row;
                }
               
$db->sql_freeresult($result);

                foreach (
$forum_data as $forum_id => $data)
                {
                    if (
$data['last_post_id'])
                    {
                        if (isset(
$post_info[$data['last_post_id']]))
                        {
                           
$forum_data[$forum_id]['last_post_subject'] = $post_info[$data['last_post_id']]['post_subject'];
                           
$forum_data[$forum_id]['last_post_time'] = $post_info[$data['last_post_id']]['post_time'];
                           
$forum_data[$forum_id]['last_poster_id'] = $post_info[$data['last_post_id']]['poster_id'];
                           
$forum_data[$forum_id]['last_poster_name'] = ($post_info[$data['last_post_id']]['poster_id'] != ANONYMOUS) ? $post_info[$data['last_post_id']]['username'] : $post_info[$data['last_post_id']]['post_username'];
                           
$forum_data[$forum_id]['last_poster_colour'] = $post_info[$data['last_post_id']]['user_colour'];
                        }
                        else
                        {
                           
// For some reason we did not find the post in the db
                           
$forum_data[$forum_id]['last_post_id'] = 0;
                           
$forum_data[$forum_id]['last_post_subject'] = '';
                           
$forum_data[$forum_id]['last_post_time'] = 0;
                           
$forum_data[$forum_id]['last_poster_id'] = 0;
                           
$forum_data[$forum_id]['last_poster_name'] = '';
                           
$forum_data[$forum_id]['last_poster_colour'] = '';
                        }
                    }
                }
            }

           
// 6: Now do that thing
           
$fieldnames = array('last_post_id', 'last_post_subject', 'last_post_time', 'last_poster_id', 'last_poster_name', 'last_poster_colour');

            if (
$sync_extra)
            {
               
array_push($fieldnames, 'posts_approved', 'posts_unapproved', 'posts_softdeleted', 'topics_approved', 'topics_unapproved', 'topics_softdeleted');
            }

           
/**
            * Event to modify the SQL array to get the post and user data from all forums' last posts
            *
            * @event core.sync_modify_forum_data
            * @var    array    forum_data        Array with data to update for all forum ids
            * @var    array    post_info        Array with some post and user data from the last posts list
            * @var    array    fieldnames        Array with the partial column names that are being updated
            * @since 3.3.5-RC1
            */
           
$vars = [
               
'forum_data',
               
'post_info',
               
'fieldnames',
            ];
           
extract($phpbb_dispatcher->trigger_event('core.sync_modify_forum_data', compact($vars)));
            unset(
$post_info);

            foreach (
$forum_data as $forum_id => $row)
            {
               
$sql_ary = array();

                foreach (
$fieldnames as $fieldname)
                {
                    if (
$row['forum_' . $fieldname] != $row[$fieldname])
                    {
                        if (
preg_match('#(name|colour|subject)$#', $fieldname))
                        {
                           
$sql_ary['forum_' . $fieldname] = (string) $row[$fieldname];
                        }
                        else
                        {
                           
$sql_ary['forum_' . $fieldname] = (int) $row[$fieldname];
                        }
                    }
                }

                if (
count($sql_ary))
                {
                   
$sql = 'UPDATE ' . FORUMS_TABLE . '
                        SET '
. $db->sql_build_array('UPDATE', $sql_ary) . '
                        WHERE forum_id = '
. $forum_id;
                   
$db->sql_query($sql);
                }
            }

           
$db->sql_transaction('commit');
            break;

        case
'topic':
           
$topic_data = $post_ids = $resync_forums = $delete_topics = $delete_posts = $moved_topics = array();

           
$db->sql_transaction('begin');

           
$sql = 'SELECT t.topic_id, t.forum_id, t.topic_moved_id, t.topic_visibility, ' . (($sync_extra) ? 't.topic_attachment, t.topic_reported, ' : '') . 't.topic_poster, t.topic_time, t.topic_posts_approved, t.topic_posts_unapproved, t.topic_posts_softdeleted, t.topic_first_post_id, t.topic_first_poster_name, t.topic_first_poster_colour, t.topic_last_post_id, t.topic_last_post_subject, t.topic_last_poster_id, t.topic_last_poster_name, t.topic_last_poster_colour, t.topic_last_post_time
                FROM '
. TOPICS_TABLE . " t
               
$where_sql";
           
$result = $db->sql_query($sql);

            while (
$row = $db->sql_fetchrow($result))
            {
                if (
$row['topic_moved_id'])
                {
                   
$moved_topics[] = $row['topic_id'];
                    continue;
                }

               
$topic_id = (int) $row['topic_id'];
               
$topic_data[$topic_id] = $row;
               
$topic_data[$topic_id]['visibility'] = ITEM_UNAPPROVED;
               
$topic_data[$topic_id]['posts_approved'] = 0;
               
$topic_data[$topic_id]['posts_unapproved'] = 0;
               
$topic_data[$topic_id]['posts_softdeleted'] = 0;
               
$topic_data[$topic_id]['first_post_id'] = 0;
               
$topic_data[$topic_id]['last_post_id'] = 0;
                unset(
$topic_data[$topic_id]['topic_id']);

               
// This array holds all topic_ids
               
$delete_topics[$topic_id] = '';

                if (
$sync_extra)
                {
                   
$topic_data[$topic_id]['reported'] = 0;
                   
$topic_data[$topic_id]['attachment'] = 0;
                }
            }
           
$db->sql_freeresult($result);

           
// Use "t" as table alias because of the $where_sql clause
            // NOTE: 't.post_visibility' in the GROUP BY is causing a major slowdown.
           
$sql = 'SELECT t.topic_id, t.post_visibility, COUNT(t.post_id) AS total_posts, MIN(t.post_id) AS first_post_id, MAX(t.post_id) AS last_post_id
                FROM '
. POSTS_TABLE . " t
               
$where_sql
                GROUP BY t.topic_id, t.post_visibility"
;
           
$result = $db->sql_query($sql);

            while (
$row = $db->sql_fetchrow($result))
            {
               
$topic_id = (int) $row['topic_id'];

               
$row['first_post_id'] = (int) $row['first_post_id'];
               
$row['last_post_id'] = (int) $row['last_post_id'];

                if (!isset(
$topic_data[$topic_id]))
                {
                   
// Hey, these posts come from a topic that does not exist
                   
$delete_posts[$topic_id] = '';
                }
                else
                {
                   
// Unset the corresponding entry in $delete_topics
                    // When we'll be done, only topics with no posts will remain
                   
unset($delete_topics[$topic_id]);

                    if (
$row['post_visibility'] == ITEM_APPROVED)
                    {
                       
$topic_data[$topic_id]['posts_approved'] = $row['total_posts'];
                    }
                    else if (
$row['post_visibility'] == ITEM_UNAPPROVED || $row['post_visibility'] == ITEM_REAPPROVE)
                    {
                       
$topic_data[$topic_id]['posts_unapproved'] = $row['total_posts'];
                    }
                    else if (
$row['post_visibility'] == ITEM_DELETED)
                    {
                       
$topic_data[$topic_id]['posts_softdeleted'] = $row['total_posts'];
                    }

                    if (
$row['post_visibility'] == ITEM_APPROVED)
                    {
                       
$topic_data[$topic_id]['visibility'] = ITEM_APPROVED;
                       
$topic_data[$topic_id]['first_post_id'] = $row['first_post_id'];
                       
$topic_data[$topic_id]['last_post_id'] = $row['last_post_id'];
                    }
                    else if (
$topic_data[$topic_id]['visibility'] != ITEM_APPROVED)
                    {
                       
// If there is no approved post, we take the min/max of the other visibilities
                        // for the last and first post info, because it is only visible to moderators anyway
                       
$topic_data[$topic_id]['first_post_id'] = (!empty($topic_data[$topic_id]['first_post_id'])) ? min($topic_data[$topic_id]['first_post_id'], $row['first_post_id']) : $row['first_post_id'];
                       
$topic_data[$topic_id]['last_post_id'] = max($topic_data[$topic_id]['last_post_id'], $row['last_post_id']);

                        if (
$topic_data[$topic_id]['visibility'] == ITEM_UNAPPROVED || $topic_data[$topic_id]['visibility'] == ITEM_REAPPROVE)
                        {
                           
// Soft delete status is stronger than unapproved.
                           
$topic_data[$topic_id]['visibility'] = $row['post_visibility'];
                        }
                    }
                }
            }
           
$db->sql_freeresult($result);

            foreach (
$topic_data as $topic_id => $row)
            {
               
$post_ids[] = $row['first_post_id'];
                if (
$row['first_post_id'] != $row['last_post_id'])
                {
                   
$post_ids[] = $row['last_post_id'];
                }
            }

           
// Now we delete empty topics and orphan posts
           
if (count($delete_posts))
            {
               
delete_posts('topic_id', array_keys($delete_posts), false);
                unset(
$delete_posts);
            }

            if (!
count($topic_data))
            {
               
// If we get there, topic ids were invalid or topics did not contain any posts
               
delete_topics($where_type, $where_ids, true);
                return;
            }

            if (
count($delete_topics))
            {
               
$delete_topic_ids = array();
                foreach (
$delete_topics as $topic_id => $void)
                {
                    unset(
$topic_data[$topic_id]);
                   
$delete_topic_ids[] = $topic_id;
                }

               
delete_topics('topic_id', $delete_topic_ids, false);
                unset(
$delete_topics, $delete_topic_ids);
            }

           
$sql_ary = array(
               
'SELECT'    => 'p.post_id, p.topic_id, p.post_visibility, p.poster_id, p.post_subject, p.post_username, p.post_time, u.username, u.user_colour',
               
'FROM'        => array(
                   
POSTS_TABLE    => 'p',
                   
USERS_TABLE => 'u',
                ),
               
'WHERE'        => $db->sql_in_set('p.post_id', $post_ids) . '
                    AND u.user_id = p.poster_id'
,
            );

           
$custom_fieldnames = [];
           
/**
            * Event to modify the SQL array to get the post and user data from all topics' last posts
            *
            * @event core.sync_topic_last_post_info_sql
            * @var    array    sql_ary                    SQL array with some post and user data from the last posts list
            * @var    array    custom_fieldnames        Empty array for custom fieldnames to update the topics_table with
            * @since 3.3.5-RC1
            */
           
$vars = [
               
'sql_ary',
               
'custom_fieldnames',
            ];
           
extract($phpbb_dispatcher->trigger_event('core.sync_topic_last_post_info_sql', compact($vars)));
           
$result = $db->sql_query($db->sql_build_query('SELECT', $sql_ary));

            while (
$row = $db->sql_fetchrow($result))
            {
               
$topic_id = intval($row['topic_id']);

                if (
$row['post_id'] == $topic_data[$topic_id]['first_post_id'])
                {
                   
$topic_data[$topic_id]['time'] = $row['post_time'];
                   
$topic_data[$topic_id]['poster'] = $row['poster_id'];
                   
$topic_data[$topic_id]['first_poster_name'] = ($row['poster_id'] == ANONYMOUS) ? $row['post_username'] : $row['username'];
                   
$topic_data[$topic_id]['first_poster_colour'] = $row['user_colour'];
                }

                if (
$row['post_id'] == $topic_data[$topic_id]['last_post_id'])
                {
                   
$topic_data[$topic_id]['last_poster_id'] = $row['poster_id'];
                   
$topic_data[$topic_id]['last_post_subject'] = $row['post_subject'];
                   
$topic_data[$topic_id]['last_post_time'] = $row['post_time'];
                   
$topic_data[$topic_id]['last_poster_name'] = ($row['poster_id'] == ANONYMOUS) ? $row['post_username'] : $row['username'];
                   
$topic_data[$topic_id]['last_poster_colour'] = $row['user_colour'];
                }

               
/**
                * Event to modify the topic_data when syncing topics
                *
                * @event core.sync_modify_topic_data
                * @var    array    topic_data        Array with the topics' data we are syncing
                * @var    array    row                Array with some of the current user and post data
                * @var    int        topic_id        The current topic_id of $row
                * @since 3.3.5-RC1
                */
               
$vars = [
                   
'topic_data',
                   
'row',
                   
'topic_id',
                ];
               
extract($phpbb_dispatcher->trigger_event('core.sync_modify_topic_data', compact($vars)));
            }
           
$db->sql_freeresult($result);

           
// Make sure shadow topics do link to existing topics
           
if (count($moved_topics))
            {
               
$delete_topics = array();

               
$sql = 'SELECT t1.topic_id, t1.topic_moved_id
                    FROM '
. TOPICS_TABLE . ' t1
                    LEFT JOIN '
. TOPICS_TABLE . ' t2 ON (t2.topic_id = t1.topic_moved_id)
                    WHERE '
. $db->sql_in_set('t1.topic_id', $moved_topics) . '
                        AND t2.topic_id IS NULL'
;
               
$result = $db->sql_query($sql);

                while (
$row = $db->sql_fetchrow($result))
                {
                   
$delete_topics[] = $row['topic_id'];
                }
               
$db->sql_freeresult($result);

                if (
count($delete_topics))
                {
                   
delete_topics('topic_id', $delete_topics, false);
                }
                unset(
$delete_topics);

               
// Make sure shadow topics having no last post data being updated (this only rarely happens...)
               
$sql = 'SELECT topic_id, topic_moved_id, topic_last_post_id, topic_first_post_id
                    FROM '
. TOPICS_TABLE . '
                    WHERE '
. $db->sql_in_set('topic_id', $moved_topics) . '
                        AND topic_last_post_time = 0'
;
               
$result = $db->sql_query($sql);

               
$shadow_topic_data = $post_ids = array();
                while (
$row = $db->sql_fetchrow($result))
                {
                   
$shadow_topic_data[$row['topic_moved_id']] = $row;
                   
$post_ids[] = $row['topic_last_post_id'];
                   
$post_ids[] = $row['topic_first_post_id'];
                }
               
$db->sql_freeresult($result);

               
$sync_shadow_topics = array();
                if (
count($post_ids))
                {
                   
$sql = 'SELECT p.post_id, p.topic_id, p.post_visibility, p.poster_id, p.post_subject, p.post_username, p.post_time, u.username, u.user_colour
                        FROM '
. POSTS_TABLE . ' p, ' . USERS_TABLE . ' u
                        WHERE '
. $db->sql_in_set('p.post_id', $post_ids) . '
                            AND u.user_id = p.poster_id'
;
                   
$result = $db->sql_query($sql);

                    while (
$row = $db->sql_fetchrow($result))
                    {
                       
$topic_id = (int) $row['topic_id'];

                       
// Ok, there should be a shadow topic. If there isn't, then there's something wrong with the db.
                        // However, there's not much we can do about it.
                       
if (!empty($shadow_topic_data[$topic_id]))
                        {
                            if (
$row['post_id'] == $shadow_topic_data[$topic_id]['topic_first_post_id'])
                            {
                               
$orig_topic_id = $shadow_topic_data[$topic_id]['topic_id'];

                                if (!isset(
$sync_shadow_topics[$orig_topic_id]))
                                {
                                   
$sync_shadow_topics[$orig_topic_id] = array();
                                }

                               
$sync_shadow_topics[$orig_topic_id]['topic_time'] = $row['post_time'];
                               
$sync_shadow_topics[$orig_topic_id]['topic_poster'] = $row['poster_id'];
                               
$sync_shadow_topics[$orig_topic_id]['topic_first_poster_name'] = ($row['poster_id'] == ANONYMOUS) ? $row['post_username'] : $row['username'];
                               
$sync_shadow_topics[$orig_topic_id]['topic_first_poster_colour'] = $row['user_colour'];
                            }

                            if (
$row['post_id'] == $shadow_topic_data[$topic_id]['topic_last_post_id'])
                            {
                               
$orig_topic_id = $shadow_topic_data[$topic_id]['topic_id'];

                                if (!isset(
$sync_shadow_topics[$orig_topic_id]))
                                {
                                   
$sync_shadow_topics[$orig_topic_id] = array();
                                }

                               
$sync_shadow_topics[$orig_topic_id]['topic_last_poster_id'] = $row['poster_id'];
                               
$sync_shadow_topics[$orig_topic_id]['topic_last_post_subject'] = $row['post_subject'];
                               
$sync_shadow_topics[$orig_topic_id]['topic_last_post_time'] = $row['post_time'];
                               
$sync_shadow_topics[$orig_topic_id]['topic_last_poster_name'] = ($row['poster_id'] == ANONYMOUS) ? $row['post_username'] : $row['username'];
                               
$sync_shadow_topics[$orig_topic_id]['topic_last_poster_colour'] = $row['user_colour'];
                            }
                        }
                    }
                   
$db->sql_freeresult($result);

                   
$shadow_topic_data = array();

                   
// Update the information we collected
                   
if (count($sync_shadow_topics))
                    {
                        foreach (
$sync_shadow_topics as $sync_topic_id => $sql_ary)
                        {
                           
$sql = 'UPDATE ' . TOPICS_TABLE . '
                                SET '
. $db->sql_build_array('UPDATE', $sql_ary) . '
                                WHERE topic_id = '
. $sync_topic_id;
                           
$db->sql_query($sql);
                        }
                    }
                }

                unset(
$sync_shadow_topics, $shadow_topic_data);
            }

           
// These are fields that will be synchronised
           
$fieldnames = array('time', 'visibility', 'posts_approved', 'posts_unapproved', 'posts_softdeleted', 'poster', 'first_post_id', 'first_poster_name', 'first_poster_colour', 'last_post_id', 'last_post_subject', 'last_post_time', 'last_poster_id', 'last_poster_name', 'last_poster_colour');

           
// Add custom fieldnames
           
$fieldnames = array_merge($fieldnames, $custom_fieldnames);
            unset(
$custom_fieldnames);

            if (
$sync_extra)
            {
               
// This routine assumes that post_reported values are correct
                // if they are not, use sync('post_reported') first
               
$sql = 'SELECT t.topic_id, p.post_id
                    FROM '
. TOPICS_TABLE . ' t, ' . POSTS_TABLE . " p
                   
$where_sql_and p.topic_id = t.topic_id
                        AND p.post_reported = 1
                    GROUP BY t.topic_id, p.post_id"
;
               
$result = $db->sql_query($sql);

               
$fieldnames[] = 'reported';
                while (
$row = $db->sql_fetchrow($result))
                {
                   
$topic_data[intval($row['topic_id'])]['reported'] = 1;
                }
               
$db->sql_freeresult($result);

               
// This routine assumes that post_attachment values are correct
                // if they are not, use sync('post_attachment') first
               
$sql = 'SELECT t.topic_id, p.post_id
                    FROM '
. TOPICS_TABLE . ' t, ' . POSTS_TABLE . " p
                   
$where_sql_and p.topic_id = t.topic_id
                        AND p.post_attachment = 1
                    GROUP BY t.topic_id, p.post_id"
;
               
$result = $db->sql_query($sql);

               
$fieldnames[] = 'attachment';
                while (
$row = $db->sql_fetchrow($result))
                {
                   
$topic_data[intval($row['topic_id'])]['attachment'] = 1;
                }
               
$db->sql_freeresult($result);
            }

            foreach (
$topic_data as $topic_id => $row)
            {
               
$sql_ary = array();

                foreach (
$fieldnames as $fieldname)
                {
                    if (isset(
$row[$fieldname]) && isset($row['topic_' . $fieldname]) && $row['topic_' . $fieldname] != $row[$fieldname])
                    {
                       
$sql_ary['topic_' . $fieldname] = $row[$fieldname];
                    }
                }

                if (
count($sql_ary))
                {
                   
$sql = 'UPDATE ' . TOPICS_TABLE . '
                        SET '
. $db->sql_build_array('UPDATE', $sql_ary) . '
                        WHERE topic_id = '
. $topic_id;
                   
$db->sql_query($sql);

                   
$resync_forums[$row['forum_id']] = $row['forum_id'];
                }
            }
            unset(
$topic_data);

           
$db->sql_transaction('commit');

           
// if some topics have been resync'ed then resync parent forums
            // except when we're only syncing a range, we don't want to sync forums during
            // batch processing.
           
if ($resync_parents && count($resync_forums) && $where_type != 'range')
            {
               
sync('forum', 'forum_id', array_values($resync_forums), true, true);
            }
            break;
    }

    return;
}

/**
* Prune function
*/
function prune($forum_id, $prune_mode, $prune_date, $prune_flags = 0, $auto_sync = true, $prune_limit = 0)
{
    global
$db, $phpbb_dispatcher;

    if (!
is_array($forum_id))
    {
       
$forum_id = array($forum_id);
    }

    if (!
count($forum_id))
    {
        return;
    }

   
$sql_and = '';

    if (!(
$prune_flags & FORUM_FLAG_PRUNE_ANNOUNCE))
    {
       
$sql_and .= ' AND topic_type <> ' . POST_ANNOUNCE;
       
$sql_and .= ' AND topic_type <> ' . POST_GLOBAL;
    }

    if (!(
$prune_flags & FORUM_FLAG_PRUNE_STICKY))
    {
       
$sql_and .= ' AND topic_type <> ' . POST_STICKY;
    }

    if (
$prune_mode == 'posted')
    {
       
$sql_and .= " AND topic_last_post_time < $prune_date";
    }

    if (
$prune_mode == 'viewed')
    {
       
$sql_and .= " AND topic_last_view_time < $prune_date";
    }

    if (
$prune_mode == 'shadow')
    {
       
$sql_and .= ' AND topic_status = ' . ITEM_MOVED . " AND topic_last_post_time < $prune_date";
    }

   
/**
    * Use this event to modify the SQL that selects topics to be pruned
    *
    * @event core.prune_sql
    * @var string    forum_id        The forum id
    * @var string    prune_mode        The prune mode
    * @var string    prune_date        The prune date
    * @var int        prune_flags        The prune flags
    * @var bool        auto_sync        Whether or not to perform auto sync
    * @var string    sql_and            SQL text appended to where clause
    * @var int        prune_limit        The prune limit
    * @since 3.1.3-RC1
    * @changed 3.1.10-RC1            Added prune_limit
    */
   
$vars = array(
       
'forum_id',
       
'prune_mode',
       
'prune_date',
       
'prune_flags',
       
'auto_sync',
       
'sql_and',
       
'prune_limit',
    );
   
extract($phpbb_dispatcher->trigger_event('core.prune_sql', compact($vars)));

   
$sql = 'SELECT topic_id
        FROM '
. TOPICS_TABLE . '
        WHERE '
. $db->sql_in_set('forum_id', $forum_id) . "
            AND poll_start = 0
           
$sql_and";
   
$result = $db->sql_query_limit($sql, $prune_limit);

   
$topic_list = array();
    while (
$row = $db->sql_fetchrow($result))
    {
       
$topic_list[] = $row['topic_id'];
    }
   
$db->sql_freeresult($result);

    if (
$prune_flags & FORUM_FLAG_PRUNE_POLL)
    {
       
$sql = 'SELECT topic_id
            FROM '
. TOPICS_TABLE . '
            WHERE '
. $db->sql_in_set('forum_id', $forum_id) . "
                AND poll_start > 0
                AND poll_last_vote <
$prune_date
               
$sql_and";
       
$result = $db->sql_query_limit($sql, $prune_limit);

        while (
$row = $db->sql_fetchrow($result))
        {
           
$topic_list[] = $row['topic_id'];
        }
       
$db->sql_freeresult($result);

       
$topic_list = array_unique($topic_list);
    }

   
/**
     * Perform additional actions before topic deletion via pruning
     *
     * @event core.prune_delete_before
     * @var int[]    topic_list        The IDs of the topics to be deleted
     * @since 3.2.2-RC1
     */
   
$vars = array('topic_list');
   
extract($phpbb_dispatcher->trigger_event('core.prune_delete_before', compact($vars)));

    return
delete_topics('topic_id', $topic_list, $auto_sync, false);
}

/**
* Function auto_prune(), this function now relies on passed vars
*/
function auto_prune($forum_id, $prune_mode, $prune_flags, $prune_days, $prune_freq, $log_prune = true)
{
    global
$db, $user, $phpbb_log;

   
$sql = 'SELECT forum_name
        FROM '
. FORUMS_TABLE . "
        WHERE forum_id =
$forum_id";
   
$result = $db->sql_query($sql, 3600);
   
$row = $db->sql_fetchrow($result);
   
$db->sql_freeresult($result);

    if (
$row)
    {
       
$prune_date = time() - ($prune_days * 86400);
       
$next_prune = time() + ($prune_freq * 86400);

       
$result = prune($forum_id, $prune_mode, $prune_date, $prune_flags, true, 300);

        if (
$result['topics'] == 0 && $result['posts'] == 0)
        {
           
$column = $prune_mode === 'shadow' ? 'prune_shadow_next' : 'prune_next';

           
$sql = 'UPDATE ' . FORUMS_TABLE . "
                SET
$column = $next_prune
                WHERE forum_id =
$forum_id";
           
$db->sql_query($sql);
        }

        if (
$log_prune)
        {
           
$phpbb_log->add('admin', $user->data['user_id'], $user->ip, 'LOG_AUTO_PRUNE', false, [$row['forum_name']]);
        }
    }

    return;
}

/**
* Cache moderators. Called whenever permissions are changed
* via admin_permissions. Changes of usernames and group names
* must be carried through for the moderators table.
*
* @param \phpbb\db\driver\driver_interface $db Database connection
* @param \phpbb\cache\driver\driver_interface $cache Cache driver
* @param \phpbb\auth\auth $auth Authentication object
* @return null
*/
function phpbb_cache_moderators($db, $cache, $auth)
{
   
// Remove cached sql results
   
$cache->destroy('sql', MODERATOR_CACHE_TABLE);

   
// Clear table
   
switch ($db->get_sql_layer())
    {
        case
'sqlite3':
           
$db->sql_query('DELETE FROM ' . MODERATOR_CACHE_TABLE);
        break;

        default:
           
$db->sql_query('TRUNCATE TABLE ' . MODERATOR_CACHE_TABLE);
        break;
    }

   
// We add moderators who have forum moderator permissions without an explicit ACL_NEVER setting
   
$sql_ary = array();

   
// Grab all users having moderative options...
   
$hold_ary = $auth->acl_user_raw_data(false, 'm_%', false);

   
// Add users?
   
if (!empty($hold_ary))
    {
       
// At least one moderative option warrants a display
       
$ug_id_ary = array_keys($hold_ary);

       
// Remove users who have group memberships with DENY moderator permissions
       
$sql_ary_deny = array(
           
'SELECT'    => 'a.forum_id, ug.user_id, g.group_id',

           
'FROM'        => array(
               
ACL_OPTIONS_TABLE    => 'o',
               
USER_GROUP_TABLE    => 'ug',
               
GROUPS_TABLE        => 'g',
               
ACL_GROUPS_TABLE    => 'a',
            ),

           
'LEFT_JOIN'    => array(
                array(
                   
'FROM'    => array(ACL_ROLES_DATA_TABLE => 'r'),
                   
'ON'    => 'a.auth_role_id = r.role_id',
                ),
            ),

           
'WHERE'        => '(o.auth_option_id = a.auth_option_id OR o.auth_option_id = r.auth_option_id)
                AND ((a.auth_setting = '
. ACL_NEVER . ' AND r.auth_setting IS NULL)
                    OR r.auth_setting = '
. ACL_NEVER . ')
                AND a.group_id = ug.group_id
                AND g.group_id = ug.group_id
                AND NOT (ug.group_leader = 1 AND g.group_skip_auth = 1)
                AND '
. $db->sql_in_set('ug.user_id', $ug_id_ary) . "
                AND ug.user_pending = 0
                AND o.auth_option "
. $db->sql_like_expression('m_' . $db->get_any_char()),
        );
       
$sql = $db->sql_build_query('SELECT', $sql_ary_deny);
       
$result = $db->sql_query($sql);

        while (
$row = $db->sql_fetchrow($result))
        {
            if (isset(
$hold_ary[$row['user_id']][$row['forum_id']]))
            {
                unset(
$hold_ary[$row['user_id']][$row['forum_id']]);
            }
        }
       
$db->sql_freeresult($result);

        if (
count($hold_ary))
        {
           
// Get usernames...
           
$sql = 'SELECT user_id, username
                FROM '
. USERS_TABLE . '
                WHERE '
. $db->sql_in_set('user_id', array_keys($hold_ary));
           
$result = $db->sql_query($sql);

           
$usernames_ary = array();
            while (
$row = $db->sql_fetchrow($result))
            {
               
$usernames_ary[$row['user_id']] = $row['username'];
            }
           
$db->sql_freeresult($result);

            foreach (
$hold_ary as $user_id => $forum_id_ary)
            {
               
// Do not continue if user does not exist
               
if (!isset($usernames_ary[$user_id]))
                {
                    continue;
                }

                foreach (
$forum_id_ary as $forum_id => $auth_ary)
                {
                   
$sql_ary[] = array(
                       
'forum_id'        => (int) $forum_id,
                       
'user_id'        => (int) $user_id,
                       
'username'        => (string) $usernames_ary[$user_id],
                       
'group_id'        => 0,
                       
'group_name'    => ''
                   
);
                }
            }
        }
    }

   
// Now to the groups...
   
$hold_ary = $auth->acl_group_raw_data(false, 'm_%', false);

    if (!empty(
$hold_ary))
    {
       
$ug_id_ary = array_keys($hold_ary);

       
// Make sure not hidden or special groups are involved...
       
$sql = 'SELECT group_name, group_id, group_type
            FROM '
. GROUPS_TABLE . '
            WHERE '
. $db->sql_in_set('group_id', $ug_id_ary);
       
$result = $db->sql_query($sql);

       
$groupnames_ary = array();
        while (
$row = $db->sql_fetchrow($result))
        {
            if (
$row['group_type'] == GROUP_HIDDEN || $row['group_type'] == GROUP_SPECIAL)
            {
                unset(
$hold_ary[$row['group_id']]);
            }

           
$groupnames_ary[$row['group_id']] = $row['group_name'];
        }
       
$db->sql_freeresult($result);

        foreach (
$hold_ary as $group_id => $forum_id_ary)
        {
           
// If there is no group, we do not assign it...
           
if (!isset($groupnames_ary[$group_id]))
            {
                continue;
            }

            foreach (
$forum_id_ary as $forum_id => $auth_ary)
            {
               
$flag = false;
                foreach (
$auth_ary as $auth_option => $setting)
                {
                   
// Make sure at least one ACL_YES option is set...
                   
if ($setting == ACL_YES)
                    {
                       
$flag = true;
                        break;
                    }
                }

                if (!
$flag)
                {
                    continue;
                }

               
$sql_ary[] = array(
                   
'forum_id'        => (int) $forum_id,
                   
'user_id'        => 0,
                   
'username'        => '',
                   
'group_id'        => (int) $group_id,
                   
'group_name'    => (string) $groupnames_ary[$group_id]
                );
            }
        }
    }

   
$db->sql_multi_insert(MODERATOR_CACHE_TABLE, $sql_ary);
}

/**
* View log
*
* @param    string    $mode            The mode defines which log_type is used and from which log the entry is retrieved
* @param    array    &$log            The result array with the logs
* @param    mixed    &$log_count        If $log_count is set to false, we will skip counting all entries in the database.
*                                    Otherwise an integer with the number of total matching entries is returned.
* @param    int        $limit            Limit the number of entries that are returned
* @param    int        $offset            Offset when fetching the log entries, f.e. when paginating
* @param    mixed    $forum_id        Restrict the log entries to the given forum_id (can also be an array of forum_ids)
* @param    int        $topic_id        Restrict the log entries to the given topic_id
* @param    int        $user_id        Restrict the log entries to the given user_id
* @param    int        $limit_days        Only get log entries newer than the given timestamp
* @param    string    $sort_by        SQL order option, e.g. 'l.log_time DESC'
* @param    string    $keywords        Will only return log entries that have the keywords in log_operation or log_data
*
* @return    int                Returns the offset of the last valid page, if the specified offset was invalid (too high)
*/
function view_log($mode, &$log, &$log_count, $limit = 0, $offset = 0, $forum_id = 0, $topic_id = 0, $user_id = 0, $limit_days = 0, $sort_by = 'l.log_time DESC', $keywords = '')
{
    global
$phpbb_log;

   
$count_logs = ($log_count !== false);

   
$log = $phpbb_log->get_logs($mode, $count_logs, $limit, $offset, $forum_id, $topic_id, $user_id, $limit_days, $sort_by, $keywords);
   
$log_count = $phpbb_log->get_log_count();

    return
$phpbb_log->get_valid_offset();
}

/**
* Removes moderators and administrators from foe lists.
*
* @param \phpbb\db\driver\driver_interface $db Database connection
* @param \phpbb\auth\auth $auth Authentication object
* @param array|bool $group_id If an array, remove all members of this group from foe lists, or false to ignore
* @param array|bool $user_id If an array, remove this user from foe lists, or false to ignore
* @return null
*/
function phpbb_update_foes($db, $auth, $group_id = false, $user_id = false)
{
   
// update foes for some user
   
if (is_array($user_id) && count($user_id))
    {
       
$sql = 'DELETE FROM ' . ZEBRA_TABLE . '
            WHERE '
. $db->sql_in_set('zebra_id', $user_id) . '
                AND foe = 1'
;
       
$db->sql_query($sql);
        return;
    }

   
// update foes for some group
   
if (is_array($group_id) && count($group_id))
    {
       
// Grab group settings...
       
$sql_ary = array(
           
'SELECT'    => 'a.group_id',

           
'FROM'        => array(
               
ACL_OPTIONS_TABLE    => 'ao',
               
ACL_GROUPS_TABLE    => 'a',
            ),

           
'LEFT_JOIN'    => array(
                array(
                   
'FROM'    => array(ACL_ROLES_DATA_TABLE => 'r'),
                   
'ON'    => 'a.auth_role_id = r.role_id',
                ),
            ),

           
'WHERE'        => '(ao.auth_option_id = a.auth_option_id OR ao.auth_option_id = r.auth_option_id)
                AND '
. $db->sql_in_set('a.group_id', $group_id) . "
                AND ao.auth_option IN ('a_', 'm_')"
,

           
'GROUP_BY'    => 'a.group_id',
        );
       
$sql = $db->sql_build_query('SELECT', $sql_ary);
       
$result = $db->sql_query($sql);

       
$groups = array();
        while (
$row = $db->sql_fetchrow($result))
        {
           
$groups[] = (int) $row['group_id'];
        }
       
$db->sql_freeresult($result);

        if (!
count($groups))
        {
            return;
        }

        switch (
$db->get_sql_layer())
        {
            case
'mysqli':
               
$sql = 'DELETE z.*
                    FROM '
. ZEBRA_TABLE . ' z, ' . USER_GROUP_TABLE . ' ug
                    WHERE z.zebra_id = ug.user_id
                        AND z.foe = 1
                        AND '
. $db->sql_in_set('ug.group_id', $groups);
               
$db->sql_query($sql);
            break;

            default:
               
$sql = 'SELECT user_id
                    FROM '
. USER_GROUP_TABLE . '
                    WHERE '
. $db->sql_in_set('group_id', $groups);
               
$result = $db->sql_query($sql);

               
$users = array();
                while (
$row = $db->sql_fetchrow($result))
                {
                   
$users[] = (int) $row['user_id'];
                }
               
$db->sql_freeresult($result);

                if (
count($users))
                {
                   
$sql = 'DELETE FROM ' . ZEBRA_TABLE . '
                        WHERE '
. $db->sql_in_set('zebra_id', $users) . '
                            AND foe = 1'
;
                   
$db->sql_query($sql);
                }
            break;
        }

        return;
    }

   
// update foes for everyone
   
$perms = array();
    foreach (
$auth->acl_get_list(false, array('a_', 'm_'), false) as $forum_id => $forum_ary)
    {
        foreach (
$forum_ary as $auth_option => $user_ary)
        {
           
$perms = array_merge($perms, $user_ary);
        }
    }

    if (
count($perms))
    {
       
$sql = 'DELETE FROM ' . ZEBRA_TABLE . '
            WHERE '
. $db->sql_in_set('zebra_id', array_unique($perms)) . '
                AND foe = 1'
;
       
$db->sql_query($sql);
    }
    unset(
$perms);
}

/**
* Lists inactive users
*/
function view_inactive_users(&$users, &$user_count, $limit = 0, $offset = 0, $limit_days = 0, $sort_by = 'user_inactive_time DESC')
{
    global
$db, $user;

   
$sql = 'SELECT COUNT(user_id) AS user_count
        FROM '
. USERS_TABLE . '
        WHERE user_type = '
. USER_INACTIVE .
        ((
$limit_days) ? " AND user_inactive_time >= $limit_days" : '');
   
$result = $db->sql_query($sql);
   
$user_count = (int) $db->sql_fetchfield('user_count');
   
$db->sql_freeresult($result);

    if (
$user_count == 0)
    {
       
// Save the queries, because there are no users to display
       
return 0;
    }

    if (
$offset >= $user_count)
    {
       
$offset = ($offset - $limit < 0) ? 0 : $offset - $limit;
    }

   
$sql = 'SELECT *
        FROM '
. USERS_TABLE . '
        WHERE user_type = '
. USER_INACTIVE .
        ((
$limit_days) ? " AND user_inactive_time >= $limit_days" : '') . "
        ORDER BY
$sort_by";
   
$result = $db->sql_query_limit($sql, $limit, $offset);

    while (
$row = $db->sql_fetchrow($result))
    {
       
$row['inactive_reason'] = $user->lang['INACTIVE_REASON_UNKNOWN'];
        switch (
$row['user_inactive_reason'])
        {
            case
INACTIVE_REGISTER:
               
$row['inactive_reason'] = $user->lang['INACTIVE_REASON_REGISTER'];
            break;

            case
INACTIVE_PROFILE:
               
$row['inactive_reason'] = $user->lang['INACTIVE_REASON_PROFILE'];
            break;

            case
INACTIVE_MANUAL:
               
$row['inactive_reason'] = $user->lang['INACTIVE_REASON_MANUAL'];
            break;

            case
INACTIVE_REMIND:
               
$row['inactive_reason'] = $user->lang['INACTIVE_REASON_REMIND'];
            break;
        }

       
$users[] = $row;
    }
   
$db->sql_freeresult($result);

    return
$offset;
}

/**
* Lists warned users
*/
function view_warned_users(&$users, &$user_count, $limit = 0, $offset = 0, $limit_days = 0, $sort_by = 'user_warnings DESC')
{
    global
$db;

   
$sql = 'SELECT user_id, username, user_colour, user_warnings, user_last_warning
        FROM '
. USERS_TABLE . '
        WHERE user_warnings > 0
        '
. (($limit_days) ? "AND user_last_warning >= $limit_days" : '') . "
        ORDER BY
$sort_by";
   
$result = $db->sql_query_limit($sql, $limit, $offset);
   
$users = $db->sql_fetchrowset($result);
   
$db->sql_freeresult($result);

   
$sql = 'SELECT count(user_id) AS user_count
        FROM '
. USERS_TABLE . '
        WHERE user_warnings > 0
        '
. (($limit_days) ? "AND user_last_warning >= $limit_days" : '');
   
$result = $db->sql_query($sql);
   
$user_count = (int) $db->sql_fetchfield('user_count');
   
$db->sql_freeresult($result);

    return;
}

/**
* Get database size
*/
function get_database_size()
{
    global
$db, $user;

   
$database_size = false;

    switch (
$db->get_sql_layer())
    {
        case
'mysqli':
           
$mysql_engine    = ['MyISAM', 'InnoDB', 'Aria'];
           
$db_name        = $db->get_db_name();
           
$database_size    = 0;

           
$sql = 'SHOW TABLE STATUS
                FROM '
. $db->sql_quote($db_name);
           
$result = $db->sql_query($sql, 7200);

            while (
$row = $db->sql_fetchrow($result))
            {
                if (isset(
$row['Engine']) && in_array($row['Engine'], $mysql_engine))
                {
                   
$database_size += $row['Data_length'] + $row['Index_length'];
                }
            }

           
$db->sql_freeresult($result);

           
$database_size = $database_size ? $database_size : false;

        break;

        case
'sqlite3':
            global
$dbhost;

            if (
file_exists($dbhost))
            {
               
$database_size = filesize($dbhost);
            }

        break;

        case
'mssql_odbc':
        case
'mssqlnative':
           
$sql = 'SELECT @@VERSION AS mssql_version';
           
$result = $db->sql_query($sql);
           
$row = $db->sql_fetchrow($result);
           
$db->sql_freeresult($result);

           
$sql = 'SELECT ((SUM(size) * 8.0) * 1024.0) as dbsize
                FROM sysfiles'
;

            if (
$row)
            {
               
// Azure stats are stored elsewhere
               
if (strpos($row['mssql_version'], 'SQL Azure') !== false)
                {
                   
$sql = 'SELECT ((SUM(reserved_page_count) * 8.0) * 1024.0) as dbsize
                    FROM sys.dm_db_partition_stats'
;
                }
            }

           
$result = $db->sql_query($sql, 7200);
           
$database_size = ($row = $db->sql_fetchrow($result)) ? $row['dbsize'] : false;
           
$db->sql_freeresult($result);
        break;

        case
'postgres':
           
$database = $db->get_db_name();

            if (
strpos($database, '.') !== false)
            {
               
$database = explode('.', $database)[0];
            }

           
$sql = "SELECT pg_database_size('" . $database . "') AS dbsize";
           
$result = $db->sql_query($sql, 7200);
           
$row = $db->sql_fetchrow($result);
           
$database_size = !empty($row['dbsize']) ? $row['dbsize'] : false;
           
$db->sql_freeresult($result);
        break;

        case
'oracle':
           
$sql = 'SELECT SUM(bytes) as dbsize
                FROM user_segments'
;
           
$result = $db->sql_query($sql, 7200);
           
$database_size = ($row = $db->sql_fetchrow($result)) ? $row['dbsize'] : false;
           
$db->sql_freeresult($result);
        break;
    }

   
$database_size = ($database_size !== false) ? get_formatted_filesize($database_size) : $user->lang['NOT_AVAILABLE'];

    return
$database_size;
}

/*
* Tidy Warnings
* Remove all warnings which have now expired from the database
* The duration of a warning can be defined by the administrator
* This only removes the warning and reduces the associated count,
* it does not remove the user note recording the contents of the warning
*/
function tidy_warnings()
{
    global
$db, $config;

   
$expire_date = time() - ($config['warnings_expire_days'] * 86400);
   
$warning_list = $user_list = array();

   
$sql = 'SELECT * FROM ' . WARNINGS_TABLE . "
        WHERE warning_time <
$expire_date";
   
$result = $db->sql_query($sql);

    while (
$row = $db->sql_fetchrow($result))
    {
       
$warning_list[] = $row['warning_id'];
       
$user_list[$row['user_id']] = isset($user_list[$row['user_id']]) ? ++$user_list[$row['user_id']] : 1;
    }
   
$db->sql_freeresult($result);

    if (
count($warning_list))
    {
       
$db->sql_transaction('begin');

       
$sql = 'DELETE FROM ' . WARNINGS_TABLE . '
            WHERE '
. $db->sql_in_set('warning_id', $warning_list);
       
$db->sql_query($sql);

        foreach (
$user_list as $user_id => $value)
        {
           
$sql = 'UPDATE ' . USERS_TABLE . " SET user_warnings = user_warnings - $value
                WHERE user_id =
$user_id";
           
$db->sql_query($sql);
        }

       
$db->sql_transaction('commit');
    }

   
$config->set('warnings_last_gc', time(), false);
}

/**
* Tidy database, doing some maintanance tasks
*/
function tidy_database()
{
    global
$config, $db;

   
// Here we check permission consistency

    // Sometimes, it can happen permission tables having forums listed which do not exist
   
$sql = 'SELECT forum_id
        FROM '
. FORUMS_TABLE;
   
$result = $db->sql_query($sql);

   
$forum_ids = array(0);
    while (
$row = $db->sql_fetchrow($result))
    {
       
$forum_ids[] = $row['forum_id'];
    }
   
$db->sql_freeresult($result);

   
$db->sql_transaction('begin');

   
// Delete those rows from the acl tables not having listed the forums above
   
$sql = 'DELETE FROM ' . ACL_GROUPS_TABLE . '
        WHERE '
. $db->sql_in_set('forum_id', $forum_ids, true);
   
$db->sql_query($sql);

   
$sql = 'DELETE FROM ' . ACL_USERS_TABLE . '
        WHERE '
. $db->sql_in_set('forum_id', $forum_ids, true);
   
$db->sql_query($sql);

   
$db->sql_transaction('commit');

   
$config->set('database_last_gc', time(), false);
}

/**
* Add permission language - this will make sure custom files will be included
*/
function add_permission_language()
{
    global
$user, $phpEx, $phpbb_extension_manager;

   
// add permission language files from extensions
   
$finder = $phpbb_extension_manager->get_finder();

   
$lang_files = $finder
       
->prefix('permissions_')
        ->
suffix(".$phpEx")
        ->
core_path('language/')
        ->
extension_directory('/language')
        ->
find();

    foreach (
$lang_files as $lang_file => $ext_name)
    {
        if (
$ext_name === '/')
        {
           
$user->add_lang($lang_file);
        }
        else
        {
           
$user->add_lang_ext($ext_name, $lang_file);
        }
    }
}

/**
 * Enables a particular flag in a bitfield column of a given table.
 *
 * @param string    $table_name        The table to update
 * @param string    $column_name    The column containing a bitfield to update
 * @param int        $flag            The binary flag which is OR-ed with the current column value
 * @param string    $sql_more        This string is attached to the sql query generated to update the table.
 *
 * @return null
 */
function enable_bitfield_column_flag($table_name, $column_name, $flag, $sql_more = '')
{
    global
$db;

   
$sql = 'UPDATE ' . $table_name . '
        SET '
. $column_name . ' = ' . $db->sql_bit_or($column_name, $flag) . '
        '
. $sql_more;
   
$db->sql_query($sql);
}

function
display_ban_end_options()
{
    global
$user, $template;

   
// Ban length options
   
$ban_end_text = array(0 => $user->lang['PERMANENT'], 30 => $user->lang['30_MINS'], 60 => $user->lang['1_HOUR'], 360 => $user->lang['6_HOURS'], 1440 => $user->lang['1_DAY'], 10080 => $user->lang['7_DAYS'], 20160 => $user->lang['2_WEEKS'], 40320 => $user->lang['1_MONTH'], -1 => $user->lang['UNTIL'] . ' -&gt; ');

   
$ban_end_options = '';
    foreach (
$ban_end_text as $length => $text)
    {
       
$ban_end_options .= '<option value="' . $length . '">' . $text . '</option>';
    }

   
$template->assign_vars(array(
       
'S_BAN_END_OPTIONS'    => $ban_end_options
   
));
}

/**
* Display ban options
*/
function display_ban_options($mode)
{
    global
$user, $db, $template;

    switch (
$mode)
    {
        case
'user':

           
$field = 'username';

           
$sql = 'SELECT b.*, u.user_id, u.username, u.username_clean
                FROM '
. BANLIST_TABLE . ' b, ' . USERS_TABLE . ' u
                WHERE (b.ban_end >= '
. time() . '
                        OR b.ban_end = 0)
                    AND u.user_id = b.ban_userid
                ORDER BY u.username_clean ASC'
;
        break;

        case
'ip':

           
$field = 'ban_ip';

           
$sql = 'SELECT *
                FROM '
. BANLIST_TABLE . '
                WHERE (ban_end >= '
. time() . "
                        OR ban_end = 0)
                    AND ban_ip <> ''
                ORDER BY ban_ip"
;
        break;

        case
'email':

           
$field = 'ban_email';

           
$sql = 'SELECT *
                FROM '
. BANLIST_TABLE . '
                WHERE (ban_end >= '
. time() . "
                        OR ban_end = 0)
                    AND ban_email <> ''
                ORDER BY ban_email"
;
        break;
    }
   
$result = $db->sql_query($sql);

   
$banned_options = $excluded_options = array();
    while (
$row = $db->sql_fetchrow($result))
    {
       
$option = '<option value="' . $row['ban_id'] . '">' . $row[$field] . '</option>';

        if (
$row['ban_exclude'])
        {
           
$excluded_options[] = $option;
        }
        else
        {
           
$banned_options[] = $option;
        }

       
$time_length = ($row['ban_end']) ? ($row['ban_end'] - $row['ban_start']) / 60 : 0;

        if (
$time_length == 0)
        {
           
// Banned permanently
           
$ban_length = $user->lang['PERMANENT'];
        }
        else if (isset(
$ban_end_text[$time_length]))
        {
           
// Banned for a given duration
           
$ban_length = $user->lang('BANNED_UNTIL_DURATION', $ban_end_text[$time_length], $user->format_date($row['ban_end'], false, true));
        }
        else
        {
           
// Banned until given date
           
$ban_length = $user->lang('BANNED_UNTIL_DATE', $user->format_date($row['ban_end'], false, true));
        }

       
$template->assign_block_vars('bans', array(
           
'BAN_ID'        => (int) $row['ban_id'],
           
'LENGTH'        => $ban_length,
           
'A_LENGTH'        => addslashes($ban_length),
           
'REASON'        => $row['ban_reason'],
           
'A_REASON'        => addslashes($row['ban_reason']),
           
'GIVE_REASON'    => $row['ban_give_reason'],
           
'A_GIVE_REASON'    => addslashes($row['ban_give_reason']),
        ));
    }
   
$db->sql_freeresult($result);

   
$options = '';
    if (
$excluded_options)
    {
       
$options .= '<optgroup label="' . $user->lang['OPTIONS_EXCLUDED'] . '">';
       
$options .= implode('', $excluded_options);
       
$options .= '</optgroup>';
    }

    if (
$banned_options)
    {
       
$options .= '<optgroup label="' . $user->lang['OPTIONS_BANNED'] . '">';
       
$options .= implode('', $banned_options);
       
$options .= '</optgroup>';
    }

   
$template->assign_vars(array(
       
'S_BANNED_OPTIONS'    => ($banned_options || $excluded_options) ? true : false,
       
'BANNED_OPTIONS'    => $options,
    ));
}