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<?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;
}
/**
* View topic in MCP
*/
function mcp_topic_view($id, $mode, $action)
{
    global $phpEx, $phpbb_root_path, $config, $request;
    global $template, $db, $user, $auth, $phpbb_container, $phpbb_dispatcher;
    $url = append_sid("{$phpbb_root_path}mcp.$phpEx?" . phpbb_extra_url());
    /* @var $pagination \phpbb\pagination */
    $pagination = $phpbb_container->get('pagination');
    $user->add_lang('viewtopic');
    $topic_id = $request->variable('t', 0);
    $topic_info = phpbb_get_topic_data(array($topic_id), false, true);
    if (!count($topic_info))
    {
        trigger_error('TOPIC_NOT_EXIST');
    }
    $topic_info = $topic_info[$topic_id];
    // Set up some vars
    $icon_id        = $request->variable('icon', 0);
    $subject        = $request->variable('subject', '', true);
    $start            = $request->variable('start', 0);
    $sort_days_old    = $request->variable('st_old', 0);
    $forum_id        = $request->variable('f', 0);
    $to_topic_id    = $request->variable('to_topic_id', 0);
    $to_forum_id    = $request->variable('to_forum_id', 0);
    $sort            = isset($_POST['sort']) ? true : false;
    $submitted_id_list    = $request->variable('post_ids', array(0));
    $checked_ids = $post_id_list = $request->variable('post_id_list', array(0));
    // Resync Topic?
    if ($action == 'resync')
    {
        if (!function_exists('mcp_resync_topics'))
        {
            include($phpbb_root_path . 'includes/mcp/mcp_forum.' . $phpEx);
        }
        mcp_resync_topics(array($topic_id));
    }
    // Split Topic?
    if ($action == 'split_all' || $action == 'split_beyond')
    {
        if (!$sort)
        {
            split_topic($action, $topic_id, $to_forum_id, $subject);
        }
        $action = 'split';
    }
    // Merge Posts?
    if ($action == 'merge_posts')
    {
        if (!$sort)
        {
            merge_posts($topic_id, $to_topic_id);
        }
        $action = 'merge';
    }
    if ($action == 'split' && !$subject)
    {
        $subject = $topic_info['topic_title'];
    }
    // Restore or pprove posts?
    if (($action == 'restore' || $action == 'approve') && $auth->acl_get('m_approve', $topic_info['forum_id']))
    {
        if (!class_exists('mcp_queue'))
        {
            include($phpbb_root_path . 'includes/mcp/mcp_queue.' . $phpEx);
        }
        include_once($phpbb_root_path . 'includes/functions_posting.' . $phpEx);
        include_once($phpbb_root_path . 'includes/functions_messenger.' . $phpEx);
        if (!count($post_id_list))
        {
            trigger_error('NO_POST_SELECTED');
        }
        if (!$sort)
        {
            mcp_queue::approve_posts($action, $post_id_list, $id, $mode);
        }
    }
    // Jumpbox, sort selects and that kind of things
    make_jumpbox($url . "&amp;i=$id&amp;mode=forum_view", $topic_info['forum_id'], false, 'm_', true);
    $where_sql = ($action == 'reports') ? 'WHERE post_reported = 1 AND ' : 'WHERE';
    $sort_days = $total = 0;
    $sort_key = $sort_dir = '';
    $sort_by_sql = $sort_order_sql = array();
    phpbb_mcp_sorting('viewtopic', $sort_days, $sort_key, $sort_dir, $sort_by_sql, $sort_order_sql, $total, $topic_info['forum_id'], $topic_id, $where_sql);
    /* @var $phpbb_content_visibility \phpbb\content_visibility */
    $phpbb_content_visibility = $phpbb_container->get('content.visibility');
    $limit_time_sql = ($sort_days) ? 'AND p.post_time >= ' . (time() - ($sort_days * 86400)) : '';
    if ($total == -1)
    {
        $total = $phpbb_content_visibility->get_count('topic_posts', $topic_info, $topic_info['forum_id']);
    }
    $posts_per_page = max(0, $request->variable('posts_per_page', intval($config['posts_per_page'])));
    if ($posts_per_page == 0)
    {
        $posts_per_page = $total;
    }
    if ((!empty($sort_days_old) && $sort_days_old != $sort_days) || $total <= $posts_per_page)
    {
        $start = 0;
    }
    $start = $pagination->validate_start($start, $posts_per_page, $total);
    $sql_where = (($action == 'reports') ? 'p.post_reported = 1 AND ' : '') . '
            p.topic_id = ' . $topic_id . '
            AND ' .    $phpbb_content_visibility->get_visibility_sql('post', $topic_info['forum_id'], 'p.') . '
            AND p.poster_id = u.user_id ' .
            $limit_time_sql;
    $sql_ary = array(
        'SELECT'    => 'u.username, u.username_clean, u.user_colour, p.*',
        'FROM'        => array(
            POSTS_TABLE        => 'p',
            USERS_TABLE        => 'u'
        ),
        'LEFT_JOIN'    => array(),
        'WHERE'        => $sql_where,
        'ORDER_BY'    => $sort_order_sql,
    );
    /**
    * Event to modify the SQL query before the MCP topic review posts is queried
    *
    * @event core.mcp_topic_modify_sql_ary
    * @var    array    sql_ary        The SQL array to get the data of the MCP topic review posts
    * @since 3.2.8-RC1
    */
    $vars = array('sql_ary');
    extract($phpbb_dispatcher->trigger_event('core.mcp_topic_modify_sql_ary', compact($vars)));
    $sql = $db->sql_build_query('SELECT', $sql_ary);
    unset($sql_ary);
    $result = $db->sql_query_limit($sql, $posts_per_page, $start);
    $rowset = $post_id_list = array();
    while ($row = $db->sql_fetchrow($result))
    {
        $rowset[] = $row;
        $post_id_list[] = $row['post_id'];
    }
    $db->sql_freeresult($result);
    // Get topic tracking info
    if ($config['load_db_lastread'])
    {
        $tmp_topic_data = array($topic_id => $topic_info);
        $topic_tracking_info = get_topic_tracking($topic_info['forum_id'], $topic_id, $tmp_topic_data, array($topic_info['forum_id'] => $topic_info['forum_mark_time']));
        unset($tmp_topic_data);
    }
    else
    {
        $topic_tracking_info = get_complete_topic_tracking($topic_info['forum_id'], $topic_id);
    }
    $has_unapproved_posts = $has_deleted_posts = false;
    // Grab extensions
    $attachments = array();
    if ($topic_info['topic_attachment'] && count($post_id_list))
    {
        // Get attachments...
        if ($auth->acl_get('u_download') && $auth->acl_get('f_download', $topic_info['forum_id']))
        {
            $sql = 'SELECT *
                FROM ' . ATTACHMENTS_TABLE . '
                WHERE ' . $db->sql_in_set('post_msg_id', $post_id_list) . '
                    AND in_message = 0
                ORDER BY filetime DESC, post_msg_id ASC';
            $result = $db->sql_query($sql);
            while ($row = $db->sql_fetchrow($result))
            {
                $attachments[$row['post_msg_id']][] = $row;
            }
            $db->sql_freeresult($result);
        }
    }
    /**
    * Event to modify the post data for the MCP topic review before assigning the posts
    *
    * @event core.mcp_topic_modify_post_data
    * @var    array    attachments        List of attachments post_id => array of attachments
    * @var    int        forum_id        The forum ID we are currently in
    * @var    int        id                ID of the tab we are displaying
    * @var    string    mode            Mode of the MCP page we are displaying
    * @var    array    post_id_list    Array with post ids we are going to display
    * @var    array    rowset            Array with the posts data
    * @var    int        topic_id        The topic ID we are currently reviewing
    * @since 3.1.7-RC1
    */
    $vars = array(
        'attachments',
        'forum_id',
        'id',
        'mode',
        'post_id_list',
        'rowset',
        'topic_id',
    );
    extract($phpbb_dispatcher->trigger_event('core.mcp_topic_modify_post_data', compact($vars)));
    foreach ($rowset as $i => $row)
    {
        $message = $row['post_text'];
        $post_subject = ($row['post_subject'] != '') ? $row['post_subject'] : $topic_info['topic_title'];
        $parse_flags = ($row['bbcode_bitfield'] ? OPTION_FLAG_BBCODE : 0) | OPTION_FLAG_SMILIES;
        $message = generate_text_for_display($message, $row['bbcode_uid'], $row['bbcode_bitfield'], $parse_flags, false);
        if (!empty($attachments[$row['post_id']]))
        {
            $update_count = array();
            parse_attachments($topic_info['forum_id'], $message, $attachments[$row['post_id']], $update_count);
        }
        if ($row['post_visibility'] == ITEM_UNAPPROVED || $row['post_visibility'] == ITEM_REAPPROVE)
        {
            $has_unapproved_posts = true;
        }
        if ($row['post_visibility'] == ITEM_DELETED)
        {
            $has_deleted_posts = true;
        }
        $post_unread = (isset($topic_tracking_info[$topic_id]) && $row['post_time'] > $topic_tracking_info[$topic_id]) ? true : false;
        $post_row = array(
            'POST_AUTHOR_FULL'        => get_username_string('full', $row['poster_id'], $row['username'], $row['user_colour'], $row['post_username']),
            'POST_AUTHOR_COLOUR'    => get_username_string('colour', $row['poster_id'], $row['username'], $row['user_colour'], $row['post_username']),
            'POST_AUTHOR'            => get_username_string('username', $row['poster_id'], $row['username'], $row['user_colour'], $row['post_username']),
            'U_POST_AUTHOR'            => get_username_string('profile', $row['poster_id'], $row['username'], $row['user_colour'], $row['post_username']),
            'POST_DATE'        => $user->format_date($row['post_time']),
            'POST_SUBJECT'    => $post_subject,
            'MESSAGE'        => $message,
            'POST_ID'        => $row['post_id'],
            'RETURN_TOPIC'    => sprintf($user->lang['RETURN_TOPIC'], '<a href="' . append_sid("{$phpbb_root_path}viewtopic.$phpEx", 't=' . $topic_id) . '">', '</a>'),
            'MINI_POST_IMG'            => ($post_unread) ? $user->img('icon_post_target_unread', 'UNREAD_POST') : $user->img('icon_post_target', 'POST'),
            'S_POST_REPORTED'    => ($row['post_reported'] && $auth->acl_get('m_report', $topic_info['forum_id'])),
            'S_POST_UNAPPROVED'    => (($row['post_visibility'] == ITEM_UNAPPROVED || $row['post_visibility'] == ITEM_REAPPROVE) && $auth->acl_get('m_approve', $topic_info['forum_id'])),
            'S_POST_DELETED'    => ($row['post_visibility'] == ITEM_DELETED && $auth->acl_get('m_approve', $topic_info['forum_id'])),
            'S_CHECKED'            => (($submitted_id_list && !in_array(intval($row['post_id']), $submitted_id_list)) || in_array(intval($row['post_id']), $checked_ids)) ? true : false,
            'S_HAS_ATTACHMENTS'    => (!empty($attachments[$row['post_id']])) ? true : false,
            'U_POST_DETAILS'    => "$url&amp;i=$id&amp;p={$row['post_id']}&amp;mode=post_details" . (($forum_id) ? "&amp;f=$forum_id" : ''),
            'U_MCP_APPROVE'        => ($auth->acl_get('m_approve', $topic_info['forum_id'])) ? append_sid("{$phpbb_root_path}mcp.$phpEx", 'i=queue&amp;mode=approve_details&amp;f=' . $topic_info['forum_id'] . '&amp;p=' . $row['post_id']) : '',
            'U_MCP_REPORT'        => ($auth->acl_get('m_report', $topic_info['forum_id'])) ? append_sid("{$phpbb_root_path}mcp.$phpEx", 'i=reports&amp;mode=report_details&amp;f=' . $topic_info['forum_id'] . '&amp;p=' . $row['post_id']) : '',
        );
        /**
        * Event to modify the template data block for topic reviews in the MCP
        *
        * @event core.mcp_topic_review_modify_row
        * @var    int        id                    ID of the tab we are displaying
        * @var    string    mode                Mode of the MCP page we are displaying
        * @var    int        topic_id            The topic ID we are currently reviewing
        * @var    int        forum_id            The forum ID we are currently in
        * @var    int        start                Start item of this page
        * @var    int        current_row_number    Number of the post on this page
        * @var    array    post_row            Template block array of the current post
        * @var    array    row                    Array with original post and user data
        * @var    array    topic_info            Array with topic data
        * @var    int        total                Total posts count
        * @since 3.1.4-RC1
        */
        $vars = array(
            'id',
            'mode',
            'topic_id',
            'forum_id',
            'start',
            'current_row_number',
            'post_row',
            'row',
            'topic_info',
            'total',
        );
        extract($phpbb_dispatcher->trigger_event('core.mcp_topic_review_modify_row', compact($vars)));
        $template->assign_block_vars('postrow', $post_row);
        // Display not already displayed Attachments for this post, we already parsed them. ;)
        if (!empty($attachments[$row['post_id']]))
        {
            foreach ($attachments[$row['post_id']] as $attachment)
            {
                $template->assign_block_vars('postrow.attachment', array(
                    'DISPLAY_ATTACHMENT'    => $attachment)
                );
            }
        }
        unset($rowset[$i]);
    }
    // Display topic icons for split topic
    $s_topic_icons = false;
    if ($auth->acl_gets('m_split', 'm_merge', (int) $topic_info['forum_id']))
    {
        include_once($phpbb_root_path . 'includes/functions_posting.' . $phpEx);
        $s_topic_icons = posting_gen_topic_icons('', $icon_id);
        // Has the user selected a topic for merge?
        if ($to_topic_id)
        {
            $to_topic_info = phpbb_get_topic_data(array($to_topic_id), 'm_merge');
            if (!count($to_topic_info))
            {
                $to_topic_id = 0;
            }
            else
            {
                $to_topic_info = $to_topic_info[$to_topic_id];
                if (!$to_topic_info['enable_icons'] || $auth->acl_get('!f_icons', $topic_info['forum_id']))
                {
                    $s_topic_icons = false;
                }
            }
        }
    }
    $s_hidden_fields = build_hidden_fields(array(
        'st_old'    => $sort_days,
        'post_ids'    => $post_id_list,
    ));
    $base_url = append_sid("{$phpbb_root_path}mcp.$phpEx", "i=$id&amp;t={$topic_info['topic_id']}&amp;mode=$mode&amp;action=$action&amp;to_topic_id=$to_topic_id&amp;posts_per_page=$posts_per_page&amp;st=$sort_days&amp;sk=$sort_key&amp;sd=$sort_dir");
    if ($posts_per_page)
    {
        $pagination->generate_template_pagination($base_url, 'pagination', 'start', $total, $posts_per_page, $start);
    }
    $template->assign_vars(array(
        'TOPIC_TITLE'        => $topic_info['topic_title'],
        'U_VIEW_TOPIC'        => append_sid("{$phpbb_root_path}viewtopic.$phpEx", 'f=' . $topic_info['forum_id'] . '&amp;t=' . $topic_info['topic_id']),
        'TO_TOPIC_ID'        => $to_topic_id,
        'TO_TOPIC_INFO'        => ($to_topic_id) ? sprintf($user->lang['YOU_SELECTED_TOPIC'], $to_topic_id, '<a href="' . append_sid("{$phpbb_root_path}viewtopic.$phpEx", 'f=' . $to_topic_info['forum_id'] . '&amp;t=' . $to_topic_id) . '">' . $to_topic_info['topic_title'] . '</a>') : '',
        'SPLIT_SUBJECT'        => $subject,
        'POSTS_PER_PAGE'    => $posts_per_page,
        'ACTION'            => $action,
        'REPORTED_IMG'        => $user->img('icon_topic_reported', 'POST_REPORTED'),
        'UNAPPROVED_IMG'    => $user->img('icon_topic_unapproved', 'POST_UNAPPROVED'),
        'DELETED_IMG'        => $user->img('icon_topic_deleted', 'POST_DELETED_RESTORE'),
        'INFO_IMG'            => $user->img('icon_post_info', 'VIEW_INFO'),
        'S_MCP_ACTION'        => "$url&amp;i=$id&amp;mode=$mode&amp;action=$action&amp;start=$start",
        'S_FORUM_SELECT'    => ($to_forum_id) ? make_forum_select($to_forum_id, false, false, true, true, true) : make_forum_select($topic_info['forum_id'], false, false, true, true, true),
        'S_CAN_SPLIT'        => ($auth->acl_get('m_split', $topic_info['forum_id'])) ? true : false,
        'S_CAN_MERGE'        => ($auth->acl_get('m_merge', $topic_info['forum_id'])) ? true : false,
        'S_CAN_DELETE'        => ($auth->acl_get('m_delete', $topic_info['forum_id'])) ? true : false,
        'S_CAN_APPROVE'        => ($has_unapproved_posts && $auth->acl_get('m_approve', $topic_info['forum_id'])) ? true : false,
        'S_CAN_RESTORE'        => ($has_deleted_posts && $auth->acl_get('m_approve', $topic_info['forum_id'])) ? true : false,
        'S_CAN_LOCK'        => ($auth->acl_get('m_lock', $topic_info['forum_id'])) ? true : false,
        'S_CAN_REPORT'        => ($auth->acl_get('m_report', $topic_info['forum_id'])) ? true : false,
        'S_CAN_SYNC'        => $auth->acl_get('m_', $topic_info['forum_id']),
        'S_REPORT_VIEW'        => ($action == 'reports') ? true : false,
        'S_MERGE_VIEW'        => ($action == 'merge') ? true : false,
        'S_SPLIT_VIEW'        => ($action == 'split') ? true : false,
        'S_HIDDEN_FIELDS'    => $s_hidden_fields,
        'S_SHOW_TOPIC_ICONS'    => $s_topic_icons,
        'S_TOPIC_ICON'            => $icon_id,
        'U_SELECT_TOPIC'    => "$url&amp;i=$id&amp;mode=forum_view&amp;action=merge_select" . (($forum_id) ? "&amp;f=$forum_id" : ''),
        'RETURN_TOPIC'        => sprintf($user->lang['RETURN_TOPIC'], '<a href="' . append_sid("{$phpbb_root_path}viewtopic.$phpEx", "f={$topic_info['forum_id']}&amp;t={$topic_info['topic_id']}&amp;start=$start") . '">', '</a>'),
        'RETURN_FORUM'        => sprintf($user->lang['RETURN_FORUM'], '<a href="' . append_sid("{$phpbb_root_path}viewforum.$phpEx", "f={$topic_info['forum_id']}&amp;start=$start") . '">', '</a>'),
        'TOTAL_POSTS'        => $user->lang('VIEW_TOPIC_POSTS', (int) $total),
    ));
}
/**
* Split topic
*/
function split_topic($action, $topic_id, $to_forum_id, $subject)
{
    global $db, $template, $user, $phpEx, $phpbb_root_path, $auth, $config, $phpbb_log, $request, $phpbb_dispatcher;
    $post_id_list    = $request->variable('post_id_list', array(0));
    $forum_id        = $request->variable('forum_id', 0);
    $start            = $request->variable('start', 0);
    if (!count($post_id_list))
    {
        $template->assign_var('MESSAGE', $user->lang['NO_POST_SELECTED']);
        return;
    }
    if (!phpbb_check_ids($post_id_list, POSTS_TABLE, 'post_id', array('m_split')))
    {
        return;
    }
    $post_id = $post_id_list[0];
    $post_info = phpbb_get_post_data(array($post_id));
    if (!count($post_info))
    {
        $template->assign_var('MESSAGE', $user->lang['NO_POST_SELECTED']);
        return;
    }
    $post_info = $post_info[$post_id];
    $subject = trim($subject);
    /**
     * Replace Emojis and other 4bit UTF-8 chars not allowed by MySQL to UCR/NCR.
     * Using their Numeric Character Reference's Hexadecimal notation.
     */
    $subject = utf8_encode_ucr($subject);
    // Make some tests
    if (!$subject)
    {
        $template->assign_var('MESSAGE', $user->lang['EMPTY_SUBJECT']);
        return;
    }
    if ($to_forum_id <= 0)
    {
        $template->assign_var('MESSAGE', $user->lang['NO_DESTINATION_FORUM']);
        return;
    }
    $forum_info = phpbb_get_forum_data(array($to_forum_id), 'f_post');
    if (!count($forum_info))
    {
        $template->assign_var('MESSAGE', $user->lang['USER_CANNOT_POST']);
        return;
    }
    $forum_info = $forum_info[$to_forum_id];
    if ($forum_info['forum_type'] != FORUM_POST)
    {
        $template->assign_var('MESSAGE', $user->lang['FORUM_NOT_POSTABLE']);
        return;
    }
    $redirect = $request->variable('redirect', build_url(array('quickmod')));
    $s_hidden_fields = build_hidden_fields(array(
        'i'                => 'main',
        'post_id_list'    => $post_id_list,
        'f'                => $forum_id,
        'mode'            => 'topic_view',
        'start'            => $start,
        'action'        => $action,
        't'                => $topic_id,
        'redirect'        => $redirect,
        'subject'        => $subject,
        'to_forum_id'    => $to_forum_id,
        'icon'            => $request->variable('icon', 0))
    );
    if (confirm_box(true))
    {
        if ($action == 'split_beyond')
        {
            $sort_days = $total = 0;
            $sort_key = $sort_dir = '';
            $sort_by_sql = $sort_order_sql = array();
            phpbb_mcp_sorting('viewtopic', $sort_days, $sort_key, $sort_dir, $sort_by_sql, $sort_order_sql, $total, $forum_id, $topic_id);
            $limit_time_sql = ($sort_days) ? 'AND t.topic_last_post_time >= ' . (time() - ($sort_days * 86400)) : '';
            if ($sort_order_sql[0] == 'u')
            {
                $sql = 'SELECT p.post_id, p.forum_id, p.post_visibility
                    FROM ' . POSTS_TABLE . ' p, ' . USERS_TABLE . " u
                    WHERE p.topic_id = $topic_id
                        AND p.poster_id = u.user_id
                        $limit_time_sql
                    ORDER BY $sort_order_sql";
            }
            else
            {
                $sql = 'SELECT p.post_id, p.forum_id, p.post_visibility
                    FROM ' . POSTS_TABLE . " p
                    WHERE p.topic_id = $topic_id
                        $limit_time_sql
                    ORDER BY $sort_order_sql";
            }
            $result = $db->sql_query_limit($sql, 0, $start);
            $store = false;
            $post_id_list = array();
            while ($row = $db->sql_fetchrow($result))
            {
                // If split from selected post (split_beyond), we split the unapproved items too.
                if (($row['post_visibility'] == ITEM_UNAPPROVED || $row['post_visibility'] == ITEM_REAPPROVE) && !$auth->acl_get('m_approve', $row['forum_id']))
                {
//                    continue;
                }
                // Start to store post_ids as soon as we see the first post that was selected
                if ($row['post_id'] == $post_id)
                {
                    $store = true;
                }
                if ($store)
                {
                    $post_id_list[] = $row['post_id'];
                }
            }
            $db->sql_freeresult($result);
        }
        if (!count($post_id_list))
        {
            trigger_error('NO_POST_SELECTED');
        }
        $icon_id = $request->variable('icon', 0);
        $sql_ary = array(
            'forum_id'            => $to_forum_id,
            'topic_title'        => $subject,
            'icon_id'            => $icon_id,
            'topic_visibility'    => 1
        );
        $sql = 'INSERT INTO ' . TOPICS_TABLE . ' ' . $db->sql_build_array('INSERT', $sql_ary);
        $db->sql_query($sql);
        $to_topic_id = $db->sql_nextid();
        move_posts($post_id_list, $to_topic_id);
        $topic_info = phpbb_get_topic_data(array($topic_id));
        $topic_info = $topic_info[$topic_id];
        $phpbb_log->add('mod', $user->data['user_id'], $user->ip, 'LOG_SPLIT_DESTINATION', false, array(
            'forum_id' => $to_forum_id,
            'topic_id' => $to_topic_id,
            $subject
        ));
        $phpbb_log->add('mod', $user->data['user_id'], $user->ip, 'LOG_SPLIT_SOURCE', false, array(
            'forum_id' => $forum_id,
            'topic_id' => $topic_id,
            $topic_info['topic_title']
        ));
        // Change topic title of first post
        $sql = 'UPDATE ' . POSTS_TABLE . "
            SET post_subject = '" . $db->sql_escape($subject) . "'
            WHERE post_id = {$post_id_list[0]}";
        $db->sql_query($sql);
        // Grab data for first post in split topic
        $sql_array = array(
            'SELECT'  => 'p.post_id, p.forum_id, p.poster_id, p.post_text, f.enable_indexing',
            'FROM' => array(
                POSTS_TABLE => 'p',
            ),
            'LEFT_JOIN' => array(
                array(
                    'FROM' => array(FORUMS_TABLE => 'f'),
                    'ON' => 'p.forum_id = f.forum_id',
                )
            ),
            'WHERE' => "post_id = {$post_id_list[0]}",
        );
        $sql = $db->sql_build_query('SELECT', $sql_array);
        $result = $db->sql_query($sql);
        $first_post_data = $db->sql_fetchrow($result);
        $db->sql_freeresult($result);
        // Index first post as if it were edited
        if ($first_post_data['enable_indexing'])
        {
            // Select the search method and do some additional checks to ensure it can actually be utilised
            $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('edit', $first_post_data['post_id'], $first_post_data['post_text'], $subject, $first_post_data['poster_id'], $first_post_data['forum_id']);
        }
        // Copy topic subscriptions to new topic
        $sql = 'SELECT user_id, notify_status
            FROM ' . TOPICS_WATCH_TABLE . '
            WHERE topic_id = ' . $topic_id;
        $result = $db->sql_query($sql);
        $sql_ary = array();
        while ($row = $db->sql_fetchrow($result))
        {
            $sql_ary[] = array(
                'topic_id'        => (int) $to_topic_id,
                'user_id'        => (int) $row['user_id'],
                'notify_status'    => (int) $row['notify_status'],
            );
        }
        $db->sql_freeresult($result);
        if (count($sql_ary))
        {
            $db->sql_multi_insert(TOPICS_WATCH_TABLE, $sql_ary);
        }
        // Copy bookmarks to new topic
        $sql = 'SELECT user_id
            FROM ' . BOOKMARKS_TABLE . '
            WHERE topic_id = ' . $topic_id;
        $result = $db->sql_query($sql);
        $sql_ary = array();
        while ($row = $db->sql_fetchrow($result))
        {
            $sql_ary[] = array(
                'topic_id'        => (int) $to_topic_id,
                'user_id'        => (int) $row['user_id'],
            );
        }
        $db->sql_freeresult($result);
        if (count($sql_ary))
        {
            $db->sql_multi_insert(BOOKMARKS_TABLE, $sql_ary);
        }
        $success_msg = 'TOPIC_SPLIT_SUCCESS';
        // Update forum statistics
        $config->increment('num_topics', 1, false);
        // Link back to both topics
        $return_link = sprintf($user->lang['RETURN_TOPIC'], '<a href="' . append_sid("{$phpbb_root_path}viewtopic.$phpEx", 'f=' . $post_info['forum_id'] . '&amp;t=' . $post_info['topic_id']) . '">', '</a>') . '<br /><br />' . sprintf($user->lang['RETURN_NEW_TOPIC'], '<a href="' . append_sid("{$phpbb_root_path}viewtopic.$phpEx", 'f=' . $to_forum_id . '&amp;t=' . $to_topic_id) . '">', '</a>');
        $redirect = $request->variable('redirect', "{$phpbb_root_path}viewtopic.$phpEx?f=$to_forum_id&amp;t=$to_topic_id");
        $redirect = reapply_sid($redirect);
        meta_refresh(3, $redirect);
        trigger_error($user->lang[$success_msg] . '<br /><br />' . $return_link);
    }
    else
    {
        confirm_box(false, ($action == 'split_all') ? 'SPLIT_TOPIC_ALL' : 'SPLIT_TOPIC_BEYOND', $s_hidden_fields);
    }
}
/**
* Merge selected posts into selected topic
*/
function merge_posts($topic_id, $to_topic_id)
{
    global $db, $template, $user, $phpEx, $phpbb_root_path, $phpbb_log, $request, $phpbb_dispatcher;
    if (!$to_topic_id)
    {
        $template->assign_var('MESSAGE', $user->lang['NO_FINAL_TOPIC_SELECTED']);
        return;
    }
    $sync_topics = array($topic_id, $to_topic_id);
    $topic_data = phpbb_get_topic_data($sync_topics, 'm_merge');
    if (!count($topic_data) || empty($topic_data[$to_topic_id]))
    {
        $template->assign_var('MESSAGE', $user->lang['NO_FINAL_TOPIC_SELECTED']);
        return;
    }
    $sync_forums = array();
    foreach ($topic_data as $data)
    {
        $sync_forums[$data['forum_id']] = $data['forum_id'];
    }
    $topic_data = $topic_data[$to_topic_id];
    $post_id_list    = $request->variable('post_id_list', array(0));
    $start            = $request->variable('start', 0);
    if (!count($post_id_list))
    {
        $template->assign_var('MESSAGE', $user->lang['NO_POST_SELECTED']);
        return;
    }
    if (!phpbb_check_ids($post_id_list, POSTS_TABLE, 'post_id', array('m_merge')))
    {
        return;
    }
    $redirect = $request->variable('redirect', build_url(array('quickmod')));
    $s_hidden_fields = build_hidden_fields(array(
        'i'                => 'main',
        'post_id_list'    => $post_id_list,
        'to_topic_id'    => $to_topic_id,
        'mode'            => 'topic_view',
        'action'        => 'merge_posts',
        'start'            => $start,
        'redirect'        => $redirect,
        't'                => $topic_id)
    );
    $return_link = '';
    if (confirm_box(true))
    {
        $to_forum_id = $topic_data['forum_id'];
        move_posts($post_id_list, $to_topic_id, false);
        $phpbb_log->add('mod', $user->data['user_id'], $user->ip, 'LOG_MERGE', false, array(
            'forum_id' => $to_forum_id,
            'topic_id' => $to_topic_id,
            $topic_data['topic_title']
        ));
        // Message and return links
        $success_msg = 'POSTS_MERGED_SUCCESS';
        // Does the original topic still exist? If yes, link back to it
        $sql = 'SELECT forum_id
            FROM ' . POSTS_TABLE . '
            WHERE topic_id = ' . $topic_id;
        $result = $db->sql_query_limit($sql, 1);
        $row = $db->sql_fetchrow($result);
        $db->sql_freeresult($result);
        if ($row)
        {
            $return_link .= sprintf($user->lang['RETURN_TOPIC'], '<a href="' . append_sid("{$phpbb_root_path}viewtopic.$phpEx", 'f=' . $row['forum_id'] . '&amp;t=' . $topic_id) . '">', '</a>');
        }
        else
        {
            if (!function_exists('phpbb_update_rows_avoiding_duplicates_notify_status'))
            {
                include($phpbb_root_path . 'includes/functions_database_helper.' . $phpEx);
            }
            // If the topic no longer exist, we will update the topic watch table.
            phpbb_update_rows_avoiding_duplicates_notify_status($db, TOPICS_WATCH_TABLE, 'topic_id', array($topic_id), $to_topic_id);
            // If the topic no longer exist, we will update the bookmarks table.
            phpbb_update_rows_avoiding_duplicates($db, BOOKMARKS_TABLE, 'topic_id', array($topic_id), $to_topic_id);
        }
        // Re-sync the topics and forums because the auto-sync was deactivated in the call of move_posts()
        sync('topic_reported', 'topic_id', $sync_topics);
        sync('topic_attachment', 'topic_id', $sync_topics);
        sync('topic', 'topic_id', $sync_topics, true);
        sync('forum', 'forum_id', $sync_forums, true, true);
        // Link to the new topic
        $return_link .= (($return_link) ? '<br /><br />' : '') . sprintf($user->lang['RETURN_NEW_TOPIC'], '<a href="' . append_sid("{$phpbb_root_path}viewtopic.$phpEx", 'f=' . $to_forum_id . '&amp;t=' . $to_topic_id) . '">', '</a>');
        $redirect = $request->variable('redirect', "{$phpbb_root_path}viewtopic.$phpEx?f=$to_forum_id&amp;t=$to_topic_id");
        $redirect = reapply_sid($redirect);
        /**
         * Perform additional actions after merging posts.
         *
         * @event core.mcp_topics_merge_posts_after
         * @var    int        topic_id        The topic ID from which posts are being moved
         * @var    int        to_topic_id        The topic ID to which posts are being moved
         * @since 3.1.11-RC1
         */
        $vars = array(
            'topic_id',
            'to_topic_id',
        );
        extract($phpbb_dispatcher->trigger_event('core.mcp_topics_merge_posts_after', compact($vars)));
        meta_refresh(3, $redirect);
        trigger_error($user->lang[$success_msg] . '<br /><br />' . $return_link);
    }
    else
    {
        confirm_box(false, 'MERGE_POSTS', $s_hidden_fields);
    }
}