<?php

define('BB_SCRIPT', 'search');
define('BB_ROOT', './');
require(BB_ROOT . 'common.php');
require(INC_DIR . 'bbcode.php');
require(CLASS_DIR . 'utf8.php');
require(CLASS_DIR . 'correct.php');
require(CLASS_DIR . 'reflection.php');

$page_cfg['use_tablesorter'] = true;
$page_cfg['load_tpl_vars'] = array(
	'post_buttons',
	'post_icons',
	'topic_icons',
);

$user->session_start(array('req_login' => $bb_cfg['disable_search_for_guest']));

set_die_append_msg();

if (isset($_POST['del_my_post']))
{
	$template->assign_var('BB_DIE_APPEND_MSG', '
		<a href="#" onclick="window.close(); window.opener.focus();">'. $lang['GOTO_MY_MESSAGE'] .'</a>
		<br /><br />
		<a href="index.php">'. $lang['INDEX_RETURN'] .'</a>
	');

	if (empty($_POST['topic_id_list']) OR !$topic_csv = get_id_csv($_POST['topic_id_list']))
	{
		bb_die($lang['NONE_SELECTED']);
	}

	DB()->query("UPDATE ". BB_POSTS ." SET user_post = 0 WHERE poster_id = {$user->id} AND topic_id IN($topic_csv)");

	if (DB()->affected_rows())
	{
		//bb_die('Выбранные темы ['. count($_POST['topic_id_list']) .' шт.] удалены из списка "Мои сообщения"');
		bb_die($lang['DEL_MY_MESSAGE']);
	}
	else
	{
		bb_die($lang['NO_TOPICS_MY_MESSAGE']);
	}
}
else if(isset($_POST['add_my_post']))
{
	$template->assign_var('BB_DIE_APPEND_MSG', '
		<a href="#" onclick="window.close(); window.opener.focus();">'. $lang['GOTO_MY_MESSAGE'] .'</a>
		<br /><br />
		<a href="index.php">'. $lang['INDEX_RETURN'] .'</a>
	');

	if (IS_GUEST)
	{
		redirect('index.php');
	}

	DB()->query("UPDATE ". BB_POSTS ." SET user_post = 1 WHERE poster_id = {$user->id}");

	redirect("search.php?u={$user->id}");
}

//
// Define censored word matches
//
$orig_word = $replacement_word = array();
obtain_word_list($orig_word, $replacement_word);

$tracking_topics = get_tracks('topic');
$tracking_forums = get_tracks('forum');

if ($mode =& $_REQUEST['mode'])
{
	// This handles the simple windowed user search functions called from various other scripts
	if ($mode == 'searchuser')
	{
		$username = isset($_POST['search_username']) ? $_POST['search_username'] : '';
		username_search($username);
		exit;
	}
}

$excluded_forums_csv = $user->get_excluded_forums(AUTH_READ);

$search_limit        = 500;
$forum_select_size   = 16;   // forum select box max rows
$max_forum_name_len  = 60;   // inside forum select box
$text_match_max_len  = 60;
$poster_name_max_len = 25;

$start = isset($_REQUEST['start']) ? abs(intval($_REQUEST['start'])) : 0;
$url   = basename(__FILE__);

$anon_id    = GUEST_UID;
$user_id    = $userdata['user_id'];
$lastvisit  = (IS_GUEST) ? TIMENOW : $userdata['user_lastvisit'];
$search_id  = (isset($_GET['id']) && verify_id($_GET['id'], SEARCH_ID_LENGTH)) ? $_GET['id'] : '';
$session_id = $userdata['session_id'];

$items_found = $items_display = $previous_settings = null;
$text_match_sql = '';

$cat_tbl        = BB_CATEGORIES      .' c';
$dl_stat_tbl    = BB_BT_DLSTATUS     .' dl';
$forums_tbl     = BB_FORUMS          .' f';
$posts_tbl      = BB_POSTS           .' p';
$posts_text_tbl = BB_POSTS_TEXT      .' pt';
$posts_html_tbl = BB_POSTS_HTML      .' h';
$tr_snap_tbl    = BB_BT_TRACKER_SNAP .' sn';
$topics_tbl     = BB_TOPICS          .' t';
$torrents_tbl   = BB_BT_TORRENTS     .' tor';
$tracker_tbl    = BB_BT_TRACKER      .' tr';
$users_tbl      = BB_USERS           .' u';

// Cat/forum data
if (!$forums = $datastore->get('cat_forums'))
{
	$datastore->update('cat_forums');
	$forums = $datastore->get('cat_forums');
}
$forum_name_html = $forums['forum_name_html'];

//
// Search options
//
// Key values
$search_all = 0;

$sort_asc   = 1;
$sort_desc  = 0;

$as_topics = 0;
$as_posts  = 1;

$show_all     = 0;
$show_briefly = 1;

$ord_posted   = 1;
$ord_name     = 2;
$ord_repl     = 3;
$ord_views    = 4;
$ord_last_p   = 5;
$ord_created  = 6;

// Order options
$order_opt = array(
	$ord_posted    => array(
		'lang' => $lang['SORT_TIME'],
		'sql'  => 'item_id',
	),
	$ord_last_p    => array(
		'lang' => $lang['BT_LAST_POST'],
		'sql'  => 't.topic_last_post_id',
	),
	$ord_created   => array(
		'lang' => $lang['BT_CREATED'],
		'sql'  => 't.topic_time',
	),
	$ord_name      => array(
		'lang' => $lang['SORT_TOPIC_TITLE'],
		'sql'  => 't.topic_title',
	),
	$ord_repl      => array(
		'lang' => $lang['REPLIES'],
		'sql'  => 't.topic_replies',
	),
);
$order_select = array();
foreach ($order_opt as $val => $opt)
{
	$order_select[$opt['lang']] = $val;
}

// Sort direction
$sort_opt = array(
	$sort_asc  => array(
		'lang' => $lang['ASC'],
		'sql'  => ' ASC ',
	),
	$sort_desc => array(
		'lang' => $lang['DESC'],
		'sql'  => ' DESC ',
	),
);
$sort_select = array();
foreach ($sort_opt as $val => $opt)
{
	$sort_select[$opt['lang']] = $val;
}

// Previous days
$time_opt = array(
	$search_all => array(
		'lang' => $lang['BT_ALL_DAYS_FOR'],
		'sql'  => 0,
	),
	1  => array(
		'lang' => $lang['BT_1_DAY_FOR'],
		'sql'  => TIMENOW - 86400,
	),
	3  => array(
		'lang' => $lang['BT_3_DAY_FOR'],
		'sql'  => TIMENOW - 86400*3,
	),
	7  => array(
		'lang' => $lang['BT_7_DAYS_FOR'],
		'sql'  => TIMENOW - 86400*7,
	),
	14 => array(
		'lang' => $lang['BT_2_WEEKS_FOR'],
		'sql'  => TIMENOW - 86400*14,
	),
	30 => array(
		'lang' => $lang['BT_1_MONTH_FOR'],
		'sql'  => TIMENOW - 86400*30,
	),
);
$time_select = array();
foreach ($time_opt as $val => $opt)
{
	$time_select[$opt['lang']] = $val;
}

// Display as
$display_as_opt = array(
	$as_topics => array(
		'lang' => $lang['TOPICS'],
	),
	$as_posts  => array(
		'lang' => $lang['MESSAGE'],
	),
);
$display_as_select = array();
foreach ($display_as_opt as $val => $opt)
{
	$display_as_select[$opt['lang']] = $val;
}

// Chars
$chars_opt = array(
	$show_all => array(
		'lang' => $lang['ALL_AVAILABLE'],
	),
	$show_briefly  => array(
		'lang' => $lang['BRIEFLY'],
	),
);
$chars_select = array();
foreach ($chars_opt as $val => $opt)
{
	$chars_select[$opt['lang']] = $val;
}

$GPC = array(
#	  var_name              key_name  def_value    GPC type
	'all_words'     => array('allw',  1,            CHBOX),
	'cat'           => array('c',     null,         REQUEST),
	'chars'         => array('ch',    $show_all,    SELECT),
	'display_as'    => array('dm',    $as_topics,   SELECT),
	'dl_cancel'     => array('dla',   0,            CHBOX),
	'dl_compl'      => array('dlc',   0,            CHBOX),
	'dl_down'       => array('dld',   0,            CHBOX),
	'dl_user_id'    => array('dlu',   $user_id,     CHBOX),
	'dl_will'       => array('dlw',   0,            CHBOX),
	'forum'         => array('f',     $search_all,  REQUEST),
	'my_topics'     => array('myt',   0,            CHBOX),
	'new'           => array('new',   0,            CHBOX),
	'new_topics'    => array('nt',    0,            CHBOX),
	'order'         => array('o',     $ord_posted,  SELECT),
	'poster_id'     => array('uid',   null,         REQUEST),
	'poster_name'   => array('pn',    null,         REQUEST),
	'sort'          => array('s',     $sort_desc,   SELECT),
	'text_match'    => array('nm',    null,         REQUEST),
	'time'          => array('tm',    $search_all,  SELECT),
	'title_only'    => array('to',    0,            CHBOX),
	'topic'         => array('t',     null,         REQUEST),
);

// Define all GPC vars with default values
foreach ($GPC as $var_name => $var_options)
{
	$GLOBALS["{$var_name}_key"] = $var_options[KEY_NAME];
	$GLOBALS["{$var_name}_val"] = $var_options[DEF_VAL];
}

// Output basic page
if (empty($_GET) && empty($_POST))
{
	// Make forum select box
	$forum_select_mode = explode(',', $excluded_forums_csv);
	$forum_select = get_forum_select($forum_select_mode, "{$forum_key}[]", $search_all, $max_forum_name_len, $forum_select_size, 'style="width: 95%;"', $search_all);

	$template->assign_vars(array(
		'TPL_SEARCH_MAIN'   => true,
		'PAGE_TITLE'        => $lang['SEARCH'],

		'POSTER_ID_KEY'     => $poster_id_key,
		'TEXT_MATCH_KEY'    => $text_match_key,
		'POSTER_NAME_KEY'   => $poster_name_key,

		'THIS_USER_ID'      => $userdata['user_id'],
		'THIS_USER_NAME'    => addslashes($userdata['username']),
		'SEARCH_ACTION'     => "search.php",
		'U_SEARCH_USER'     => "search.php?mode=searchuser&amp;input_name=$poster_name_key",
		'ONLOAD_FOCUS_ID'   => 'text_match_input',

		'MY_TOPICS_ID'      => 'my_topics',
		'MY_TOPICS_CHBOX'   => build_checkbox ($my_topics_key,  $lang['SEARCH_MY_TOPICS'],   $my_topics_val,  true,     null, 'my_topics'),
		'TITLE_ONLY_CHBOX'  => build_checkbox ($title_only_key, $lang['SEARCH_TITLES_ONLY'], true,            $bb_cfg['disable_ft_search_in_posts']),
		'ALL_WORDS_CHBOX'   => build_checkbox ($all_words_key,  $lang['SEARCH_ALL_WORDS'],   true),
		'DL_CANCEL_CHBOX'   => build_checkbox ($dl_cancel_key,  $lang['SEARCH_DL_CANCEL'],   $dl_cancel_val,  IS_GUEST, 'dlCancel'),
		'DL_COMPL_CHBOX'    => build_checkbox ($dl_compl_key,   $lang['SEARCH_DL_COMPLETE'], $dl_compl_val,   IS_GUEST, 'dlComplete'),
		'DL_DOWN_CHBOX'     => build_checkbox ($dl_down_key,    $lang['SEARCH_DL_DOWN'],     $dl_down_val,    IS_GUEST, 'dlDown'),
		'DL_WILL_CHBOX'     => build_checkbox ($dl_will_key,    $lang['SEARCH_DL_WILL'],     $dl_will_val,    IS_GUEST, 'dlWill'),
		'ONLY_NEW_CHBOX'    => build_checkbox ($new_key,        $lang['BT_ONLY_NEW'],        $new_val,        IS_GUEST),
		'NEW_TOPICS_CHBOX'  => build_checkbox ($new_topics_key, $lang['NEW_TOPICS'],         $new_topics_val, IS_GUEST),

		'FORUM_SELECT'      => $forum_select,
		'TIME_SELECT'       => build_select ($time_key,  $time_select,  $time_val),
		'ORDER_SELECT'      => build_select ($order_key, $order_select, $order_val),
		'SORT_SELECT'       => build_select ($sort_key,  $sort_select,  $sort_val),
		'CHARS_SELECT'      => '', # build_select ($chars_key, $chars_select, $chars_val),
		'DISPLAY_AS_SELECT' => build_select ($display_as_key, $display_as_select, $display_as_val),
	));

	print_page('search.tpl');
}

unset($forums);
$datastore->rm('cat_forums');

// Restore previously found items list and search settings if we have valid $search_id
if ($search_id)
{
	$row = DB()->fetch_row("
		SELECT search_array, search_settings
		FROM ". BB_SEARCH ."
		WHERE session_id = '$session_id'
			AND search_type = ". SEARCH_TYPE_POST ."
			AND search_id = '". DB()->escape($search_id) ."'
		LIMIT 1
	");

	if (empty($row['search_settings']))
	{
		bb_die($lang['SESSION_EXPIRED']);
	}

	$previous_settings = unserialize($row['search_settings']);
	$items_found = explode(',', $row['search_array']);
}

// Get simple "CHBOX" and "SELECT" type vars
foreach ($GPC as $name => $params)
{
	if ($params[GPC_TYPE] == CHBOX)
	{
		checkbox_get_val($params[KEY_NAME], ${"{$name}_val"}, $params[DEF_VAL]);
	}
	else if ($params[GPC_TYPE] == SELECT)
	{
		select_get_val($params[KEY_NAME], ${"{$name}_val"}, ${"{$name}_opt"}, $params[DEF_VAL]);
	}
}

// Get other "REQUEST" vars
$egosearch = false;

if (!$items_found)
{
	// For compatibility with old-style params
	if (isset($_REQUEST['search_id']))
	{
		switch ($_REQUEST['search_id'])
		{
		case 'egosearch':
			$egosearch = true;
			$display_as_val = $as_topics;
			if (empty($_REQUEST[$poster_id_key]))
			{
				$_REQUEST[$poster_id_key] = $user_id;
			}
			break;
		case 'newposts':
			$new_val = true;
			break;
		}
	}

	// Forum
	$forum_selected = '';
	if ($var =& $_REQUEST[$forum_key])
	{
		$forum_selected = get_id_ary($var);

		if (!in_array($search_all, $forum_selected))
		{
			$forum_val = join(',', $forum_selected);
		}
	}

	// Topic
	if ($var =& $_REQUEST[$topic_key])
	{
		$topic_val = join(',', get_id_ary($var));
	}

	// Poster id (from requested name or id)
	if ($var = request_var($poster_id_key, 0))
	{
		$poster_id_val = (int) $var;

		if ($poster_id_val != $user_id && !get_username($poster_id_val))
		{
			bb_die($lang['USER_NOT_EXIST']);
		}
	}
	else if ($var =& $_POST[$poster_name_key])
	{
		$poster_name_sql = str_replace("\\'", "''", clean_username($var));

		if (!$poster_id_val = get_user_id($poster_name_sql))
		{
			bb_die($lang['USER_NOT_EXIST']);
		}
	}

	// Search words
	if ($var =& $_REQUEST[$text_match_key])
	{
		if ($tmp = mb_substr(trim($var), 0, $text_match_max_len))
		{
			if ($bb_cfg['autocorrect_wkl'])
			{
				// Autocorrect wrong keyboard layout
				$tlc = new Text_LangCorrect();
				$title_match_val = $tlc->parse($tlc->parse($tmp, 1), 2);
			}
			else
			{
				$title_match_val = $tmp;
			}
			$text_match_sql = clean_text_match($title_match_val, $all_words_val, false, true);
		}
	}
}

$dl_status = array();
if ($dl_cancel_val) $dl_status[] = DL_STATUS_CANCEL;
if ($dl_compl_val)  $dl_status[] = DL_STATUS_COMPLETE;
if ($dl_down_val)   $dl_status[] = DL_STATUS_DOWN;
if ($dl_will_val)   $dl_status[] = DL_STATUS_WILL;
$dl_status_csv = join(',', $dl_status);

// Switches
$dl_search   = ($dl_status && !IS_GUEST);
$new_posts   = ($new_val && !IS_GUEST);
$prev_days   = ($time_val != $search_all);
$new_topics  = (!IS_GUEST && ($new_topics_val || isset($_GET['newposts'])));
$my_topics   = ($poster_id_val && $my_topics_val);
$my_posts    = ($poster_id_val && !$my_topics_val);
$title_match = ($text_match_sql && ($title_only_val || $bb_cfg['disable_ft_search_in_posts']));

// "Display as" mode (posts or topics)
$post_mode = (!$dl_search && ($display_as_val == $as_posts || isset($_GET['search_author'])));

// Start building SQL
$SQL = DB()->get_empty_sql_array();

// Displaying "as posts" mode
if ($post_mode)
{
	$order    = $order_opt[$order_val]['sql'];
	$sort     = $sort_opt[$sort_val]['sql'];
	$per_page = $bb_cfg['posts_per_page'];
	$display_as_val = $as_posts;

	// Run initial search for post_ids
	if (!$items_found)
	{
		$join_t = ($title_match || $my_topics || $new_topics || in_array($order_val, array($ord_last_p, $ord_created, $ord_name, $ord_repl)));
		$join_s = ($text_match_sql && !$title_match);
		$join_p = ($my_posts || $join_s);

		$tbl        = ($join_t && !$join_p) ? 't' : 'p';
		$time_field = ($join_t && !$join_p) ? 'topic_last_post_time' : 'post_time';

		// SELECT
		$SQL['SELECT'][] = ($join_t && !$join_p) ? 't.topic_first_post_id AS item_id' : 'p.post_id AS item_id';

		// FROM
		if ($join_t) $SQL['FROM'][] = $topics_tbl;
		if ($join_p) $SQL['FROM'][] = $posts_tbl;

		if (!$SQL['FROM'])
		{
			$join_p = true;
			$SQL['FROM'][] = $posts_tbl;
		}

		// WHERE
		if ($join_p && $join_t) $SQL['WHERE'][] = "t.topic_id = p.topic_id";

		if ($excluded_forums_csv) $SQL['WHERE'][] = "$tbl.forum_id NOT IN($excluded_forums_csv)";

		if ($forum_val)  $SQL['WHERE'][] = "$tbl.forum_id IN($forum_val)";
		if ($topic_val)  $SQL['WHERE'][] = "$tbl.topic_id IN($topic_val)";
		if ($new_posts)  $SQL['WHERE'][] = "$tbl.$time_field > $lastvisit";
		if ($new_topics) $SQL['WHERE'][] = "t.topic_time > $lastvisit";
		if ($prev_days)  $SQL['WHERE'][] = "$tbl.$time_field > ". $time_opt[$time_val]['sql'];
		if ($my_posts)   $SQL['WHERE'][] = "p.poster_id = $poster_id_val";
		if ($my_topics)  $SQL['WHERE'][] = "t.topic_poster = $poster_id_val";

		if ($text_match_sql)
		{
			$search_match_topics_csv = '';
			$title_match_topics = get_title_match_topics($text_match_sql, $forum_selected);

			if (!$search_match_topics_csv = join(',', $title_match_topics))
			{
				bb_die($lang['NO_SEARCH_MATCH']);
			}

			$where_id = ($title_match) ? 'topic_id' : 'post_id';

			$SQL['WHERE'][] = "$tbl.$where_id IN($search_match_topics_csv)";
			prevent_huge_searches($SQL);
		}

		if (!$SQL['WHERE']) redirect(basename(__FILE__));

		$SQL['GROUP BY'][] = "item_id";
		$SQL['ORDER BY'][] = ($new_posts && $join_p) ? "p.topic_id ASC, p.post_time ASC" : "$order $sort";
		$SQL['LIMIT'][]    = "$search_limit";

		$items_display = fetch_search_ids($SQL);
	}
	else if (!$items_display = array_slice($items_found, $start, $per_page))
	{
		bb_die($lang['NO_SEARCH_MATCH']);
	}

	// Build SQL for displaying posts
	$excluded_forums_sql = ($excluded_forums_csv) ? " AND t.forum_id NOT IN($excluded_forums_csv) " : '';

	$sql = "
		SELECT
		  p.post_id AS item_id,
		  t.*,
		  p.*,
		  h.post_html, IF(h.post_html IS NULL, pt.post_text, NULL) AS post_text,
		  IF(p.poster_id = $anon_id, p.post_username, u.username) AS username, u.user_id, u.user_rank
		FROM       $posts_tbl
		INNER JOIN $topics_tbl     ON(t.topic_id = p.topic_id)
		INNER JOIN $posts_text_tbl ON(pt.post_id = p.post_id)
		 LEFT JOIN $posts_html_tbl ON(h.post_id = pt.post_id)
		INNER JOIN $users_tbl      ON(u.user_id = p.poster_id)
		WHERE
		      p.post_id IN(". join(',', $items_display) .")
		    $excluded_forums_sql
		LIMIT $per_page
	";

	// Fetch posts data
	if (!$unsorted_rows = DB()->fetch_rowset($sql))
	{
		bb_die($lang['NO_SEARCH_MATCH']);
	}
	$tmp = $sorted_rows = array();

	foreach ($unsorted_rows as $row)
	{
		$tmp[$row['post_id']] = $row;
	}
	foreach ($items_display as $post_id)
	{
		if (empty($tmp[$post_id]))
		{
			continue; // if post was deleted but still remain in search results
		}
		$topic_id = $tmp[$post_id]['topic_id'];
		$sorted_rows[$topic_id][] = $tmp[$post_id];
	}

	// Output page
	$new_tracks = array();

	foreach ($sorted_rows as $topic_id => $topic_posts)
	{
		// Topic title block
		$first_post  = $topic_posts[0];
		$topic_id    = (int) $topic_id;
		$forum_id    = (int) $first_post['forum_id'];
		$is_unread_t = is_unread($first_post['topic_last_post_time'], $topic_id, $forum_id);
		$topic_title = $first_post['topic_title'];

		if (count($orig_word))
		{
			$topic_title = preg_replace($orig_word, $replacement_word, $topic_title);
		}

		$template->assign_block_vars('t', array(
			'FORUM_ID'    => $forum_id,
			'FORUM_NAME'  => $forum_name_html[$forum_id],
			'TOPIC_ID'    => $topic_id,
			'TOPIC_TITLE' => $topic_title,
			'TOPIC_ICON'  => get_topic_icon($first_post, $is_unread_t),
		));

		$quote_btn = $edit_btn = $ip_btn = '';
		$delpost_btn = (IS_AM);

		// Topic posts block
		foreach ($topic_posts as $row_num => $post)
		{
			if ($post['poster_id'] != BOT_UID)
			{
				if ($bb_cfg['fix_quote_button'])
				{
					$quote_btn = !IS_GUEST;
				}
				else
				{
					$quote_btn = true;
				}
				$edit_btn = $ip_btn = (IS_AM);
			}

			$message = get_parsed_post($post);

			if (count($orig_word))
			{
				$message = preg_replace($orig_word, $replacement_word, $message);
			}

			$template->assign_block_vars('t.p', array(
				'ROW_NUM'      => $row_num,
				'POSTER_ID'    => $post['poster_id'],
				'POSTER'       => profile_url($post),
				'POST_ID'      => $post['post_id'],
				'POST_DATE'    => bb_date($post['post_time'], $bb_cfg['post_date_format']),
				'IS_UNREAD'    => is_unread($post['post_time'], $topic_id, $forum_id),
				'MESSAGE'      => $message,
				'POSTED_AFTER' => '',
				'QUOTE'        => $quote_btn,
				'EDIT'         => $edit_btn,
				'DELETE'       => $delpost_btn,
				'IP'           => $ip_btn,
			));

			$curr_new_track_val = !empty($new_tracks[$topic_id]) ? $new_tracks[$topic_id] : 0;
			$new_tracks[$topic_id] = max($curr_new_track_val, $post['post_time']);
		}
	}
	set_tracks(COOKIE_TOPIC, $tracking_topics, $new_tracks);
}
// Displaying "as topics" mode
else
{
	$order    = $order_opt[$order_val]['sql'];
	$sort     = $sort_opt[$sort_val]['sql'];
	$per_page = $bb_cfg['topics_per_page'];
	$display_as_val = $as_topics;

	// Run initial search for topic_ids
	if (!$items_found)
	{
		$join_t  = ($title_match || $my_topics || $new_topics || $dl_search || $new_posts || in_array($order_val, array($ord_last_p, $ord_created, $ord_name, $ord_repl)));
		$join_s  = ($text_match_sql && !$title_match);
		$join_p  = ($my_posts || $join_s);
		$join_dl = ($dl_search);

		$tbl        = ($join_p && !$join_t) ? 'p' : 't';
		$time_field = ($join_p && !$join_t) ? 'post_time' : 'topic_last_post_time';

		// SELECT
		if ($egosearch)
		{
			$SQL['SELECT'][] = 'p.topic_id AS item_id, MAX(p.post_time) AS max_post_time';
		}
		else
		{
			$SQL['SELECT'][] = ($join_p && !$join_t) ? 'p.topic_id AS item_id' : 't.topic_id AS item_id';
		}

		// FROM
		if ($join_t) $SQL['FROM'][] = $topics_tbl;
		if ($join_p) $SQL['FROM'][] = $posts_tbl;

		if (!$SQL['FROM'])
		{
			$join_t = true;
			$SQL['FROM'][] = $topics_tbl;
		}

		// WHERE
		if ($join_p && $join_t) $SQL['WHERE'][] = "t.topic_id = p.topic_id";

		if ($excluded_forums_csv) $SQL['WHERE'][] = "$tbl.forum_id NOT IN($excluded_forums_csv)";

		if ($join_t)     $SQL['WHERE'][] = "t.topic_status != ". TOPIC_MOVED;
		if ($forum_val)  $SQL['WHERE'][] = "$tbl.forum_id IN($forum_val)";
		if ($topic_val)  $SQL['WHERE'][] = "$tbl.topic_id IN($topic_val)";
		if ($new_posts)  $SQL['WHERE'][] = "$tbl.$time_field > $lastvisit";
		if ($new_topics) $SQL['WHERE'][] = "t.topic_time > $lastvisit";
		if ($prev_days)  $SQL['WHERE'][] = "$tbl.$time_field > ". $time_opt[$time_val]['sql'];
		if ($my_posts)   $SQL['WHERE'][] = "p.poster_id = $poster_id_val";
		if ($my_posts && $user->id == $poster_id_val)
		{
			$SQL['WHERE'][] = "p.user_post = 1";

			if($userdata['user_posts'])
			{
				$template->assign_var('BB_DIE_APPEND_MSG', '
					<form id="mod-action" method="POST" action="search.php">
						<input type="submit" name="add_my_post" value="'. $lang['RESTORE_ALL_POSTS'] .'" class="bold" onclick="if (!window.confirm( this.value +\'?\' )){ return false };" />
					</form>
					<br /><br />
					<a href="index.php">'. $lang['INDEX_RETURN'] .'</a>
				');
			}
		}
		if ($my_topics)  $SQL['WHERE'][] = "t.topic_poster = $poster_id_val";

		if ($text_match_sql)
		{
			$search_match_topics_csv = '';
			$title_match_topics = get_title_match_topics($text_match_sql, $forum_selected);

			if (!$search_match_topics_csv = join(',', $title_match_topics))
			{
				bb_die($lang['NO_SEARCH_MATCH']);
			}

			$where_id = ($title_match) ? 't.topic_id' : 'p.post_id';

			$SQL['WHERE'][] = "$where_id IN($search_match_topics_csv)";
			prevent_huge_searches($SQL);
		}

		if ($join_dl) $SQL['FROM'][] = $dl_stat_tbl;
		if ($join_dl) $SQL['WHERE'][] = "dl.topic_id = t.topic_id AND dl.user_id = $dl_user_id_val AND dl.user_status IN($dl_status_csv)";

		if (!$SQL['WHERE']) redirect(basename(__FILE__));

		$SQL['GROUP BY'][] = "item_id";
		$SQL['LIMIT'][]    = "$search_limit";

		if ($egosearch)
		{
			$SQL['ORDER BY'][] = 'max_post_time DESC';
		}
		else
		{
			$SQL['ORDER BY'][] = ($order_val == $ord_posted) ? "$tbl.$time_field $sort" : "$order $sort";
		}

		$items_display = fetch_search_ids($SQL);
	}
	else if (!$items_display = array_slice($items_found, $start, $per_page))
	{
		bb_die($lang['NO_SEARCH_MATCH']);
	}

	// Build SQL for displaying topics
	$SQL = DB()->get_empty_sql_array();
	$join_dl = ($bb_cfg['show_dl_status_in_search'] && !IS_GUEST);

	$SQL['SELECT'][] = "
		t.*, t.topic_poster AS first_user_id, u1.user_rank AS first_user_rank,
		IF(t.topic_poster = $anon_id, p1.post_username, u1.username) AS first_username,
		p2.poster_id AS last_user_id, u2.user_rank AS last_user_rank,
		IF(p2.poster_id = $anon_id, p2.post_username, u2.username) AS last_username
	";
	if ($join_dl) $SQL['SELECT'][] = "dl.user_status AS dl_status";

	$SQL['FROM'][]      = BB_TOPICS ." t";
	$SQL['LEFT JOIN'][] = BB_POSTS  ." p1 ON(t.topic_first_post_id = p1.post_id)";
	$SQL['LEFT JOIN'][] = BB_USERS  ." u1 ON(t.topic_poster = u1.user_id)";
	$SQL['LEFT JOIN'][] = BB_POSTS  ." p2 ON(t.topic_last_post_id = p2.post_id)";
	$SQL['LEFT JOIN'][] = BB_USERS  ." u2 ON(p2.poster_id = u2.user_id)";
	if ($join_dl)
	{
		$SQL['LEFT JOIN'][] = BB_BT_DLSTATUS ." dl ON(dl.user_id = $user_id AND dl.topic_id = t.topic_id)";
	}

	$SQL['WHERE'][]	= "t.topic_id IN(". join(',', $items_display) .")";
	if ($excluded_forums_csv)
	{
		$SQL['WHERE'][]	= "t.forum_id NOT IN($excluded_forums_csv)";
	}

	$SQL['LIMIT'][] = "$per_page";

	// Fetch topics data
	$topic_rows = array();
	foreach (DB()->fetch_rowset($SQL) as $row)
	{
		$topic_rows[$row['topic_id']] = $row;
	}
	if (!$topic_rows)
	{
		bb_die($lang['NO_SEARCH_MATCH']);
	}

	// Output page
	foreach ($items_display as $row_num => $item_id)
	{
		if (empty($topic_rows[$item_id]))
		{
			continue;  // if topic was deleted but still remain in search results
		}
		$topic     = $topic_rows[$item_id];
		$topic_id  = $topic['topic_id'];
		$forum_id  = $topic['forum_id'];
		$is_unread = is_unread($topic['topic_last_post_time'], $topic_id, $forum_id);
		$moved     = ($topic['topic_status'] == TOPIC_MOVED);

		$template->assign_block_vars('t', array(
			'ROW_NUM'       => $row_num,
			'FORUM_ID'      => $forum_id,
			'FORUM_NAME'    => $forum_name_html[$forum_id],
			'TOPIC_ID'      => $topic_id,
			'HREF_TOPIC_ID' => ($moved) ? $topic['topic_moved_id'] : $topic['topic_id'],
			'TOPIC_TITLE'   => wbr(preg_replace($orig_word, $replacement_word, $topic['topic_title'])),
			'IS_UNREAD'     => $is_unread,
			'TOPIC_ICON'    => get_topic_icon($topic, $is_unread),
			'PAGINATION'    => ($moved) ? '' : build_topic_pagination(TOPIC_URL . $topic_id, $topic['topic_replies'], $bb_cfg['posts_per_page']),
			'REPLIES'       => ($moved) ? '' : $topic['topic_replies'],
			'ATTACH'        => $topic['topic_attachment'],
			'STATUS'        => $topic['topic_status'],
			'TYPE'          => $topic['topic_type'],
			'DL'            => ($topic['topic_dl_type'] == TOPIC_DL_TYPE_DL),
			'POLL'          => !IS_GUEST && $topic['topic_vote'],
			'DL_CLASS'      => isset($topic['dl_status']) ? $dl_link_css[$topic['dl_status']] : '',

			'TOPIC_AUTHOR'  => profile_url(array('username' => $topic['first_username'], 'user_id' => $topic['first_user_id'], 'user_rank' => $topic['first_user_rank'])),
			'LAST_POSTER'   => profile_url(array('username' => $topic['last_username'], 'user_id' => $topic['last_user_id'], 'user_rank' => $topic['last_user_rank'])),
			'LAST_POST_TIME' => bb_date($topic['topic_last_post_time']),
			'LAST_POST_TIME_RAW' => $topic['topic_last_post_time'],
			'LAST_POST_ID'  => $topic['topic_last_post_id'],
		));
	}
}

if ($items_display)
{
	$items_count = count($items_found);
	$pages = (!$items_count) ? 1 : ceil($items_count / $per_page);
	$url = ($search_id) ? url_arg($url, 'id', $search_id) : $url;

	generate_pagination($url, $items_count, $per_page, $start);

	$template->assign_vars(array(
		'PAGE_TITLE'       => $lang['SEARCH'],

		'SEARCH_MATCHES'   => ($items_count) ? sprintf($lang['FOUND_SEARCH_MATCHES'], $items_count) : '',
		'DISPLAY_AS_POSTS' => $post_mode,

		'DL_CONTROLS'      => ($dl_search && $dl_user_id_val == $user_id),
		'DL_ACTION'        => 'dl_list.php',
		'MY_POSTS'         => (!$post_mode && $my_posts && $user->id == $poster_id_val),
	));

	print_page('search_results.tpl');
}

redirect(basename(__FILE__));

// ----------------------------------------------------------- //
// Functions
//
function fetch_search_ids ($sql, $search_type = SEARCH_TYPE_POST)
{
	global $lang, $search_id, $session_id, $items_found, $per_page;

	$items_found = array();
	foreach (DB()->fetch_rowset($sql) as $row)
	{
		$items_found[] = $row['item_id'];
	}
	if (!$items_count = count($items_found))
	{
		bb_die($lang['NO_SEARCH_MATCH']);
	}

	// Save results in DB
	$search_id = make_rand_str(SEARCH_ID_LENGTH);

	if ($items_count > $per_page)
	{
		$search_array = join(',', $items_found);

		$save_in_db = array(
			'order',
			'sort',
			'display_as',
			'chars',
		);
		if ($GLOBALS['dl_cancel_val']) $save_in_db[] = 'dl_cancel';
		if ($GLOBALS['dl_compl_val'])  $save_in_db[] = 'dl_compl';
		if ($GLOBALS['dl_down_val'])   $save_in_db[] = 'dl_down';
		if ($GLOBALS['dl_will_val'])   $save_in_db[] = 'dl_will';

		$curr_set = array();
		foreach ($save_in_db as $name)
		{
			$curr_set[$GLOBALS["{$name}_key"]] = $GLOBALS["{$name}_val"];
		}
		$search_settings = DB()->escape(serialize($curr_set));

		$columns =  'session_id,   search_type,   search_id,   search_time,    search_settings,    search_array';
		$values = "'$session_id', $search_type, '$search_id', ". TIMENOW .", '$search_settings', '$search_array'";

		DB()->query("REPLACE INTO ". BB_SEARCH ." ($columns) VALUES ($values)");
	}

	return array_slice($items_found, 0, $per_page);
}

function prevent_huge_searches ($SQL)
{
	global $bb_cfg;

	if ($bb_cfg['limit_max_search_results'])
	{
		$SQL['select_options'][] = 'SQL_CALC_FOUND_ROWS';
		$SQL['ORDER BY'] = array();
		$SQL['LIMIT']    = array('0');

		if (DB()->query($SQL) AND $row = DB()->fetch_row("SELECT FOUND_ROWS() AS rows_count"))
		{
			if ($row['rows_count'] > $bb_cfg['limit_max_search_results'])
			{
#				bb_log(str_compact(DB()->build_sql($SQL)) ." [{$row['rows_count']} rows]". LOG_LF, 'sql_huge_search');
				bb_die('Too_many_search_results');
			}
		}
	}
}

function username_search ($search_match)
{
	global $template, $lang, $gen_simple_header;

	$username_list = '';

	if (!empty($search_match))
	{
		$username_search = preg_replace('/\*/', '%', clean_username($search_match));

		$sql = "
			SELECT username
			FROM ". BB_USERS ."
			WHERE username LIKE '". DB()->escape($username_search) . "'
				AND user_id <> ". GUEST_UID ."
			ORDER BY username
			LIMIT 200
		";

		foreach (DB()->fetch_rowset($sql) as $row)
		{
			$username = htmlCHR(stripslashes(html_entity_decode($row['username'])));
			$username_list .= '<option value="'. $username .'">'. $username .'</option>';
		}
		if (!$username_list)
		{
			$username_list = '<option value="">'. $lang['NO_MATCH'] .'</option>';
		}
	}

	$input_name = isset($_REQUEST['input_name']) ? htmlCHR($_REQUEST['input_name']) : 'username';

	$template->assign_vars(array(
		'TPL_SEARCH_USERNAME' => true,

		'PAGE_TITLE'        => $lang['SEARCH'],
		'USERNAME'          => !empty($search_match) ? htmlCHR(stripslashes(html_entity_decode($search_match))) : '',
		'INPUT_NAME'        => $input_name,
		'USERNAME_OPTIONS'  => $username_list,
		'SEARCH_ACTION'     => "search.php?mode=searchuser&amp;input_name=$input_name",
	));

	print_page('search.tpl', 'simple');
}