<?php

/*
+--------------------------------------------------------------------------
|   IBFORUMS v1
|   ========================================
|   by Matthew Mecham and David Baxter
|   (c) 2001,2002 IBForums
|   http://www.ibforums.com
|   ========================================
|   Web: http://www.ibforums.com
|   Email: phpboards@ibforums.com
|   Licence Info: phpib-licence@ibforums.com
+---------------------------------------------------------------------------
|
|   > Searching procedures
|   > Module written by Matt Mecham
|   > Date started: 24th February 2002
|
|	> Module Version Number: 1.0.0
+--------------------------------------------------------------------------
|
|   MODULE NOTES:
|   -------------
|
|   I've been deliberating whether we should implement some kind of WORD ID / 
|   search logging table for index.
|   iB3 PERL had such a feature, but that was to aide the DBM searches, which
|   were slow at best.
|   The biggest complaint we had was that adding a word ID / search logging table
|   effectively doubled the amount of space needed in the mySQL database. I've seen
|   this complaint echo'd on the support boards of other forum software.
|   The other downside to such a feature would be the overhaul needed to update it
|   with new posts/topics and topic movement / deletion.
|  
|   I figure that people post more than they search, so a full table scan once per
|   search request is offset against the CPU to keep the search log tables up to date
|
|   I'm going to stick my neck out and go the full table scan route. It's not as effecient
|   as a search table would be, but the benefits include no overhead updating it, and a smaller
|   overall DB size - which is vital to some people on certain hosts.
|
|   This may change if it becomes apparent that it's not very efficient in the long run
+--------------------------------------------------------------------------
*/

// 

$idx = new Search;

class Search {

    var $output     = "";
    var $page_title = "";
    var $nav        = array();
    var $html       = "";
    
    var $first      = 0;
    
    var $search_type = 'posts';
    var $sort_order  = 'desc';
    var $sort_key    = 'last_post';
    var $search_in   = 'posts';
    var $prune       = '30';
    var $st_time     = array();
    var $end_time    = array();
    var $st_stamp    = "";
    var $end_stamp   = "";
    
    function Search() {
    	global $ibforums, $DB, $std, $print;
    	
    	if (! $ibforums->vars['allow_search'])
    	{
    		$std->Error( array( LEVEL => 1, MSG => 'search_off') );
    	}
    	
    	if ($ibforums->member['g_use_search'] != 1)
 		{
 			$std->Error( array( 'LEVEL' => 1, 'MSG' => 'no_permission' ) );
    	}
    	
    	
    	if ($ibforums->input['CODE'] == "") $ibforums->input['CODE'] = '00';
    	
    	//--------------------------------------------
    	// Require the HTML and language modules
    	//--------------------------------------------
    	
		$ibforums->lang = $std->load_words($ibforums->lang, 'lang_search', $ibforums->lang_id );
		$ibforums->lang = $std->load_words($ibforums->lang, 'lang_forum' , $ibforums->lang_id );
    	
    	require "./Skin/".$ibforums->skin_id."/skin_search.php";
    	
    	$this->html = new skin_search();
    	
    	$this->base_url        = "{$ibforums->vars['board_url']}/index.{$ibforums->vars['php_ext']}?s={$ibforums->session_id}";
    	
    	if (isset($ibforums->input['st']) )
    	{
    		$this->first = $ibforums->input['st'];
    	}
    	
    	//--------------------------------------------
    	// What to do?
    	//--------------------------------------------
    	
    	if (! isset($ibforums->member['g_use_search']) )
    	{
    		$std->Error( array( LEVEL => 1, MSG => 'cant_use_feature') );
    	}
    	
    	switch($ibforums->input['CODE']) {
    		case '01':
    			$this->do_search();
    			break;
    		case '03':
    			$this->get_new_posts();
    			break;
    		case 'getactive':
    			$this->get_active();
    			break;
    		case 'show':
    			$this->show_results();
    			break;
    		default:
    			$this->show_form();
    			break;
    	}
    	
    	// If we have any HTML to print, do so...
    	
    	$print->add_output("$this->output");
        $print->do_output( array( 'TITLE' => $this->page_title, 'JS' => 0, NAV => $this->nav ) );
    		
 	}
 	
 	function show_form() {
 		global $DB, $std, $ibforums;
 		
 		$last_cat_id = -1;
 		
 		$the_hiddens = "";
		
		$DB->query("SELECT f.id as forum_id, f.name as forum_name, f.position, f.read_perms, c.id as cat_id, c.name as cat_name from ibf_forums f, ibf_categories c where c.id=f.category ORDER BY c.position, f.position");
		
		$forums   = "<select name='forums' class='forminput' onChange='chooseForum()'>\n"
		           ."<option value='all'>&gt;&gt;All open forums";
		           
		$cats     = "<select name='cats' class='forminput' onChange='chooseCat()'>\n"
		           ."<option value='all'>&gt;&gt;All Categories";
		
		while ( $i = $DB->fetch_row() ) {
			if ($last_cat_id != $i['cat_id'])
			{
				// Print the category
				$last_cat_id = $i['cat_id'];
				$cats .= "<option value='{$i['cat_id']}'>{$i['cat_name']}\n";
			}
			
			$selected = "";
			
			if ( isset($ibforums->input['f']) and ($ibforums->input['f'] == $i['forum_id']) )
			{
				$selected = ' selected';
			}
			
			if ($i['read_perms'] == '*')
			{
				$forums    .= "<option value=\"{$i['forum_id']}\"$selected>{$i['forum_name']}\n";
			}
			else if (preg_match( "/(^|,)".$ibforums->member['mgroup']."(,|$)/", $i['read_perms']) )
			{
				$forums .= "<option value='{$i['forum_id']}'$selected>{$i['forum_name']}\n";
			}
			else
			{
				continue;
			}
		}
		
		$forums .= "</select>";
		$cats   .= "</select>";
		
		$this->output = $this->html->Form($forums, $cats);
		
		$this->page_title = $ibforums->lang['search_title'];
		$this->nav        = array( $ibforums->lang['search_form'] );
		
 	}
 	
 	/******************************************************/
 	//
 	// Searching is split into two queries. One query to
 	// regexp the matches, and pull the topic ID's, the other
 	// to pull the data from the topic_id. As topic_id's are indexed
 	// the second query shouldn't be too CPU intensive.
 	//
 	// To find the maximum records that match our criteria to
 	// generate the page span, we cap all searches off to '200'
 	// results. We then use mysql_num_rows to return the actual
 	// number of rows matched, loop over and push the info to 
 	// our $topic var until we have 25 results, which is the max.
 	// number per page.
 	//
 	// The other alternative would be to SELECT COUNT(*) then
 	// re-query with a 25 LIMIT cap, this of course would be
 	// a heavy drain on the SQL engine.
 	/******************************************************/
 	

	function do_search() {
		global $ibforums, $DB, $std, $HTTP_POST_VARS, $print;
		
		//------------------------------------
		// Do we have any input?
		//------------------------------------
		
		if ($ibforums->input['keywords'] == "")
		{
			if ($ibforums->input['namesearch'] != "")
			{
				$keywords = $this->filter_keywords($ibforums->input['namesearch']);
				$this->search_type = 'name';
			}
			else if ($ibforums->input['useridsearch'] != "")
			{
				$keywords = $this->filter_keywords($ibforums->input['useridsearch']);
				$this->search_type = 'userid';
			}
		}
		else
		{
			$keywords = $this->filter_keywords($ibforums->input['keywords']);
			$this->search_type = 'posts';
		}
		
		//------------------------------------
		
		$check_keywords = trim($keywords);
		
		$check_keywords = str_replace( "%", "", $check_keywords );
		
		if ( (! $check_keywords) or ($check_keywords == "") or (! isset($check_keywords) ) )
		{
			$std->Error( array( 'LEVEL' => 1, 'MSG' => 'no_search_words') );
		}
		
		//------------------------------------
		
		if ($ibforums->input['search_in'] == 'titles')
		{
			$this->search_in = 'titles';
		}
		
		//------------------------------------
		
		$forums = $this->get_searchable_forums();
		
		//------------------------------------
		// Do we have any forums to search in?
		//------------------------------------
		
		if ($forums == "")
		{
			$std->Error( array( 'LEVEL' => 1, 'MSG' => 'no_search_forum') );
		}
	
		//------------------------------------
		
		foreach( array( 'last_post', 'posts', 'starter_name', 'forum_id' ) as $v )
		{
			if ($ibforums->input['sort_key'] == $v)
			{
				$this->sort_key = $v;
			}
		}
		
		//------------------------------------
		
		foreach ( array( 1, 7, 30, 365, 0 ) as $v )
		{
			if ($ibforums->input['prune'] == $v)
			{
				$this->prune = $v;
			}
		}
		
		//------------------------------------
		
		if ($ibforums->input['sort_order'] == 'asc')
		{
			$this->sort_order = 'asc';
		}
		
		//------------------------------------
		
		$query = "";
		
		
		if ($this->search_in == 'titles')
		{
			$query = "SELECT DISTINCT(tid) ".
					 "FROM ibf_topics ".
					 "WHERE forum_id IN ($forums) ".
					 "AND approved=1 AND (";
		}
		else
		{
			$query = "SELECT DISTINCT(t.tid) ".
					 "FROM ibf_posts p, ibf_topics t ".
					 "WHERE (t.tid=p.topic_id AND p.forum_id IN ($forums))".
					 " AND (t.approved=1 and p.queued <> 1)".
					 " AND (";
		}
				 
		 // Is this a membername search?
		 
		 if ( ($this->search_type == 'name') or ($this->search_type == 'userid') )
		 {
			//------------------------------------------------------------------
			// Get all the possible matches for the supplied name from the DB
			//------------------------------------------------------------------
			
			$keywords = trim( $keywords );
			
			if ($this->search_type == 'name')
			{
				
				if ($ibforums->input['exactname'] == 1)
				{
					$sql_query = "SELECT id from ibf_members WHERE lower(name)='".$keywords."'";
				}
				else
				{
					$sql_query = "SELECT id from ibf_members WHERE name like '%".$keywords."%'";
				}
			}
			else
			{
				$sql_query = "SELECT id from ibf_members WHERE id='".$keywords."'";
			}
			
			$DB->query( $sql_query );
			$member_string = "";
			
			while ($row = $DB->fetch_row())
			{
				$member_string .= "'".$row['id']."',";
			}
			
			$member_string = preg_replace( "/,$/", "", $member_string );
			
			// Error out of we matched no members
			
			if ($member_string == "")
			{
				$std->Error( array( 'LEVEL' => 1, 'MSG' => 'no_search_results') );
			}
			
			//------------------------------------------------------------------
			// If we are still here, append the $query.
			//------------------------------------------------------------------
			
			switch ( $this->search_in ) {
				case 'posts':
					$query .= "(p.author_id IN ($member_string) or t.starter_id IN ($member_string))";
					break;
				case 'titles':
					$query .= "starter_id IN ($member_string)";
					break;
				default:
					$query .= "(p.author_id IN ($member_string) or t.starter_id IN ($member_string))";
					break;
			}
			
			
		}
		else {
			
			//------------------------------------------------------------------
			// Must be a search in posts / topic titles then..
			//------------------------------------------------------------------
			// Start by matching our keywords and pairing them up with a boolean
			// operator if needed.
			//------------------------------------------------------------------
			
			if ($ibforums->input['smethod'] == 'advanced')
			{
				preg_match_all( "/(^|and|or)\s{1,}(\S+?)\s{1,}/", $keywords, $matches );
				
				for ($i = 0 ; $i < count($matches[0]) ; $i++ )
				{
					$boolean = $matches[1][$i];
					$word    = trim($matches[2][$i]);
					
					if ( preg_match( "/^%/" , $word ) )
					{
						$word = preg_replace( "/^%/", "", $word);
					}
					else
					{
						$word = '[^0-9a-zA-Z]?'.$word;
					}
					
					if ( preg_match( "/%$/" , $word ) )
					{
						$word = preg_replace( "/%$/", "", $word);
					}
					else
					{
						$word = $word . '[ \t.,!?:;]?';
					}				
					
					if ($boolean)
					{
						$boolean = " $boolean";
					}
					
					switch ( $this->search_in )
					{
						case 'posts':
							$query .= "$boolean (LOWER(t.title) REGEXP '$word' or LOWER(p.post) REGEXP '$word') ";
							break;
						case 'titles':
							$query .= "$boolean LOWER(title) REGEXP '$word' ";
							break;
						default:
							$query .= "$boolean (LOWER(t.title) REGEXP '$word' or LOWER(p.post) REGEXP '$word') ";
							break;
					}
				}
			
			}
			else
			{
				switch ( $this->search_in )
					{
						case 'posts':
							$query .= " (LOWER(t.title) LIKE '%".trim($keywords)."%' or LOWER(p.post) LIKE '%".trim($keywords)."%') ";
							break;
						case 'titles':
							$query .= " LOWER(title) LIKE '%".trim($keywords)."%' ";
							break;
						default:
							$query .= " (LOWER(t.title) LIKE '%".trim($keywords)."%' or LOWER(p.post) LIKE '%".trim($keywords)."%') ";
							break;
					}
			}
		}
			
		// Close this WHERE argument...
		
		$query .= ") ";
		
		// Add on the prune days
		
		if ($this->prune > 0)
		{
			$gt_lt = $ibforums->input['prune_type'] == 'older' ? "<" : ">";
			$time = time() - ($ibforums->input['prune'] * 86400);
			
			switch ( $this->search_in )
			{
				case 'posts':
					$query .= "AND (t.last_post $gt_lt $time or p.post_date $gt_lt $time)";
					break;
				case 'titles':
					$query .= "AND last_post $gt_lt $time";
					break;
				default:
					$query .= "AND (t.last_post $gt_lt $time or p.post_date $gt_lt $time)";
					break;
			}
		}
		
		//------------------------------------------------
		// Get the topic ID's to serialize and store into
		// the database
		//------------------------------------------------
		
		$DB->query($query);
	
		$max_hits = $DB->get_num_rows();
	
		$topics = "";
		
		while ($row = $DB->fetch_row() )
		{
			$topics .= $row['tid'].",";
		}
	
		$DB->free_result();
		
		$topics = preg_replace( "/,$/", "", $topics );
		
		//------------------------------------------------
		// Do we have any results?
		//------------------------------------------------
		
		if ($topics == "")
		{
			$std->Error( array( 'LEVEL' => 1, 'MSG' => 'no_search_results' ) );
		}
		
		//------------------------------------------------
		// If we are still here, store the data into the database...
		//------------------------------------------------
		
		$unique_id = md5(uniqid(microtime(),1));
		
		$DB->query("INSERT INTO ibf_search_results (id, topics, search_date, max_hits, sort_key, sort_order) VALUES ('$unique_id', '$topics', '".time()."', '$max_hits', '".$this->sort_key."', '".$this->sort_order."')");
		
		$print->redirect_screen( $ibforums->lang['search_redirect'] , "act=Search&CODE=show&searchid=$unique_id&highlite=".urlencode(trim($keywords)) );
		exit();
		
	}
	
	/******************************************************/
	// Show Results
	// Shows the results of the search
	/******************************************************/
	
	function show_results() {
		global $ibforums, $DB, $std, $HTTP_POST_VARS;
		
		if ( $read = $std->my_getcookie('topicsread') )
        {
        	$this->read_array = unserialize(stripslashes($read));
        }
		
		//------------------------------------------------
		// We have a search ID, so lets get the parsed results.
		// Delete old search queries (older than 24 hours)
		//------------------------------------------------
		
		$t_time = time() - (60*60*24);
		
		$DB->query("DELETE FROM ibf_search_results WHERE search_date < '$t_time'");
		
		$unique_id = $ibforums->input['searchid'];
		
		if ($unique_id == "")
		{
			$std->Error( array( 'LEVEL' => 1, 'MSG' => 'no_search_results' ) );
		}
		
		$DB->query("SELECT * FROM ibf_search_results WHERE id='$unique_id'");
		$sr = $DB->fetch_row();
		
		$topics   = $sr['topics'];
		$max_hits = $sr['max_hits'];
		
		$this->sort_order = $sr['sort_order'];
		$this->sort_key   = $sr['sort_key'];
		
		if ($topics == "")
		{
			$std->Error( array( 'LEVEL' => 1, 'MSG' => 'no_search_results' ) );
		}
		
		$url_words = $this->convert_highlite_words($ibforums->input['highlite']);
		
		$links = $std->build_pagelinks( array( TOTAL_POSS  => $max_hits,
											   PER_PAGE    => 25,
											   CUR_ST_VAL  => $this->first,
											   L_SINGLE    => "",
											   L_MULTI     => $ibforums->lang['search_pages'],
											   BASE_URL    => $this->base_url."&act=Search&CODE=show&searchid=$unique_id&hl=".$url_words,
											 )
									  );
									  
		
		
		$this->output .= $this->html->start( array( 'SHOW_PAGES' => $links ) );
		
		$DB->query("SELECT t.*, f.id as forum_id, f.name as forum_name FROM ibf_topics t, ibf_forums f WHERE t.tid IN($topics) and f.id=t.forum_id ORDER BY ".$this->sort_key." ".$this->sort_order." LIMIT ".$this->first.",25");
		
		while ( $row = $DB->fetch_row() )
		{
			$row['keywords'] = $url_words;
			$this->output .= $this->html->RenderRow( $this->parse_entry($row) );
		
		}
		
		$this->page_title = $ibforums->lang['search_results'];
		$this->nav        = array( "<a href='{$this->base_url}&act=Search'>{$ibforums->lang['search_form']}</a>", $ibforums->lang['search_title'] );
		
		$this->output .= $this->html->end(array( 'SHOW_PAGES' => $links ));
		
	}

	/******************************************************/
	// Get active
	// Show all topics posted in / created between a user
	// definable amount of days..
	/******************************************************/
	
	function get_active() {
		global $ibforums, $DB, $std, $HTTP_POST_VARS;
		
		
		//------------------------------------
		// If we don't have a search ID (searchid)
		// then it's a fresh query.
		//
		//------------------------------------
		
		if (! isset($ibforums->input['searchid']) )
		{
		
			//------------------------------------
			// Do we have any start date input?
			//------------------------------------
			
			if ($ibforums->input['st_day'] == "")
			{
				// No? Lets work out the start date as 24hrs ago
				$ibforums->input['st_day'] = 1;
				$this->st_stamp = time() - (60*60*24);
				
			}
			else
			{
				$ibforums->input['st_day'] = preg_replace( "/s/", "", $ibforums->input['st_day']);
				$this->st_stamp = time() - (60*60*24*$ibforums->input['st_day']);
			}
			
			
			//------------------------------------
			// Do we have any END date input?
			//------------------------------------
			
			if ($ibforums->input['end_day'] == "")
			{
				// No? Lets work out the end date as now
				
				$this->end_stamp = time();
				$ibforums->input['end_day'] = 0;
				
			}
			else
			{
				$ibforums->input['end_day'] = preg_replace( "/e/", "", $ibforums->input['end_day']);
				$this->end_stamp = time() - (60*60*24*$ibforums->input['end_day']);
			}
			
			
			//------------------------------------
			// Synchronise our input data
			//------------------------------------
			
			$ibforums->input['cat_forum'] = 'cat';
			$ibforums->input['cats']      = 'all';
			
			$forums = $this->get_searchable_forums();
			
			//------------------------------------
			// Do we have any forums to search in?
			//------------------------------------
			
			if ($forums == "")
			{
				$std->Error( array( 'LEVEL' => 1, 'MSG' => 'no_search_forum') );
			}
		
			
			
			$query = "SELECT DISTINCT(t.tid) FROM ibf_posts p, ibf_topics t WHERE p.post_date < ".$this->end_stamp." AND p.post_date > ".$this->st_stamp." AND p.forum_id IN($forums) and p.topic_id=t.tid ORDER BY t.last_post DESC LIMIT 0,200";
			
			//------------------------------------------------
			// Get the topic ID's to serialize and store into
			// the database
			//------------------------------------------------
			
			$DB->query($query);
		
			$max_hits = $DB->get_num_rows();
		
			$topics = "";
			
			while ($row = $DB->fetch_row() )
			{
				$topics .= $row['tid'].",";
			}
		
			$DB->free_result();
			
			$topics = preg_replace( "/,$/", "", $topics );
			
			//------------------------------------------------
			// Do we have any results?
			//------------------------------------------------
			
			if ($topics == "")
			{
				$this->output .= $this->html->active_start( array( 'SHOW_PAGES' => "" ) );
				$this->output .= $this->html->active_none();
				$this->output .= $this->html->end("");
				$this->page_title = $ibforums->lang['search_results'];
				$this->nav        = array( "<a href='{$this->base_url}&act=Search'>{$ibforums->lang['search_form']}</a>", $ibforums->lang['search_title'] );
				return ""; // return empty handed
			}
			
			//------------------------------------------------
			// If we are still here, store the data into the database...
			//------------------------------------------------
			
			$unique_id = md5(uniqid(microtime(),1));
			
			$DB->query("INSERT INTO ibf_search_results (id, topics, search_date, max_hits, sort_key, sort_order) VALUES ('$unique_id', '$topics', '".time()."', '$max_hits', '".$this->sort_key."', '".$this->sort_order."')");
			
		}
		else 
		{
			//------------------------------------------------
			// We have a search ID, so lets get the parsed results.
			// Delete old search queries (older than 24 hours)
			//------------------------------------------------
			
			$t_time = time() - (60*60*24);
			
			$DB->query("DELETE FROM ibf_search_results WHERE search_date < '$t_time'");
			
			$unique_id = $ibforums->input['searchid'];
			
			$DB->query("SELECT * FROM ibf_search_results WHERE id='$unique_id'");
			$sr = $DB->fetch_row();
			
			$topics   = $sr['topics'];
			$max_hits = $sr['max_hits'];
			
			$this->sort_order = $sr['sort_order'];
			$this->sort_key   = $sr['sort_key'];
			
			if ($topics == "")
			{
				$std->Error( array( 'LEVEL' => 1, 'MSG' => 'no_search_results' ) );
			}
		}
		
		// Our variables are centralised, lets get the array slice depending on our $this->first
		// position.
		
		// How cool is this? ;)
		
		$topic_string = implode( "," , array_slice( explode(",",$topics), $this->first, 25 ) );
		
		// That splits the string into an array by a comma, gets a slice depending on our limit,
		// say 0 to 25 and then joins the array into a string seperated by commas, all in one
		// line :D
			
		$url_words = urlencode(trim($keywords));
			
		$links = $std->build_pagelinks( array( TOTAL_POSS  => $max_hits,
											   PER_PAGE    => 25,
											   CUR_ST_VAL  => $this->first,
											   L_SINGLE    => "",
											   L_MULTI     => "",
											   BASE_URL    => $this->base_url."&act=Search&CODE=getactive&searchid=$unique_id",
											 )
									  );
									  
		
		
		$this->output .= $this->html->active_start( array( 'SHOW_PAGES' => $links ) );
		
		// Regex in our selected values.
		
		$this->output = preg_replace( "/(<option value='s".$ibforums->input['st_day']."')/" , "\\1 selected", $this->output );
		$this->output = preg_replace( "/(<option value='e".$ibforums->input['end_day']."')/", "\\1 selected", $this->output );
		
		$DB->query("SELECT t.*, f.id as forum_id, f.name as forum_name FROM ibf_topics t, ibf_forums f WHERE t.tid IN($topic_string) and f.id=t.forum_id ORDER BY ".$this->sort_key." ".$this->sort_order." LIMIT 0,25");
		
		while ( $row = $DB->fetch_row() )
		{
			$row['keywords'] = $url_words;
			$this->output .= $this->html->RenderRow( $this->parse_entry($row) );
		
		}
		
		$this->page_title = $ibforums->lang['search_results'];
		$this->nav        = array( "<a href='{$this->base_url}&act=Search'>{$ibforums->lang['search_form']}</a>", $ibforums->lang['search_title'] );
		
		$this->output .= $this->html->end("");
		
	}
    
    
    
    
    
	function parse_entry($topic) {
		global $DB, $std, $ibforums;
		
		$topic['last_text']   = $ibforums->lang[last_post_by];
		
		$topic['last_poster'] = ($topic['last_poster_id'] != 0)
								? "<b><a href='{$this->base_url}&act=Profile&CODE=03&MID={$topic['last_poster_id']}'>{$topic['last_poster_name']}</a></b>"
								: "-".$topic['last_poster_name']."-";
								
		$topic['starter']     = ($topic['starter_id']     != 0)
								? "<a href='{$this->base_url}&act=Profile&CODE=03&MID={$topic['starter_id']}'>{$topic['starter_name']}</a>"
								: "-".$topic['starter_name']."-";
	 
		if ($topic['poll_state'])
		{
			$topic['prefix']     = $ibforums->vars['pre_polls'].' ';
		}
	
		$topic['folder_img']     = $std->folder_icon($topic);
		
		$topic['topic_icon']     = $topic['icon_id']  ? '<img src="'.$ibforums->vars['img_url'] . '/icon' . $topic['icon_id'] . '.gif" border="0" alt="">'
													  : '&nbsp;';
															  
		if ($topic['pinned'])
		{
			$topic['topic_icon']       = $ibforums->skin['B_PIN'];
		}
		
		$topic['topic_start_date'] = $std->get_date( $topic['start_date'], 'LONG' );
	
	
		$pages = 1;
		
		if ($topic['posts'])
		{
			if ( (($topic['posts'] + 1) % $ibforums->vars['display_max_posts']) == 0 )
			{
				$pages = ($topic['posts'] + 1) / $ibforums->vars['display_max_posts'];
			}
			else
			{
				$number = ( ($topic['posts'] + 1) / $ibforums->vars['display_max_posts'] );
				$pages = ceil( $number);
			}
			
		}
		
		if ($pages > 1)
		{
			$topic['PAGES'] = "<span id='small'>({$ibforums->lang['topic_sp_pages']} ";
			for ($i = 0 ; $i < $pages ; ++$i ) {
				$real_no = $i * $ibforums->vars['display_max_posts'];
				$page_no = $i + 1;
				if ($page_no == 4) {
					$topic['PAGES'] .= "<a href='{$this->base_url}&act=ST&f={$topic['forum_id']}&t={$topic['tid']}&st=" . ($pages - 1) * $ibforums->vars['display_max_posts'] . "&hl={$topic['keywords']}'>...$pages </a>";
					break;
				} else {
					$topic['PAGES'] .= "<a href='{$this->base_url}&act=ST&f={$topic['forum_id']}&t={$topic['tid']}&st=$real_no&hl={$topic['keywords']}'>$page_no </a>";
				}
			}
			$topic['PAGES'] .= ")</span>";
		}
		
		if ($topic['posts'] < 0) $topic['posts'] = 0;
		
		$last_time = $this->read_array[ $topic['tid'] ] > $ibforums->input['last_visit'] ? $this->read_array[ $topic['tid'] ] : $ibforums->input['last_visit'];
		
		if ($last_time  && ($topic['last_post'] > $last_time))
		{
			$topic['go_last_page'] = "<a href='{$this->base_url}&act=ST&f={$topic['forum_id']}&t={$topic['tid']}&view=getlastpost'>" . $ibforums->skin['GO_LAST_ON'] . "</a>";
			$topic['go_new_post']  = "<a href='{$this->base_url}&act=ST&f={$topic['forum_id']}&t={$topic['tid']}&view=getnewpost'>"  . $ibforums->skin['NEW_POST']   . "</a>";
		
		}
		else
		{
			$topic['go_last_page'] = "<a href='{$this->base_url}&act=ST&f={$topic['forum_id']}&t={$topic['tid']}&view=getlastpost'>" . $ibforums->skin['GO_LAST_OFF'] . "</a>";
			$topic['go_new_post']  = "";
		}
		
		// Do the quick goto last page icon stuff
		
		$maxpages = ($pages - 1) * $ibforums->vars['display_max_posts'];
		if ($maxpages < 0) $maxpages = 0;
		
		$topic['last_post']  = $std->get_date($topic['last_post'], 'LONG');
			
		if ($topic['state'] == 'link')
		{
			$t_array = explode("&", $topic['moved_to']);
			$topic['tid']       = $t_array[0];
			$topic['forum_id']  = $t_array[1];
			$topic['title']     = $topic['title'];
			$topic['views']     = '--';
			$topic['posts']     = '--';
			$topic['prefix']    = $ibforums->vars['pre_moved']." ";
			$topic['go_new_post'] = "";
		}
		
		if ($topic['pinned'] == 1)
		{
			$topic['prefix']     = $ibforums->vars['pre_pinned'];
			$topic['topic_icon'] = $ibforums->skin['B_PIN'];
			
		}
		  
		return $topic;
	}
        
     
        
    function filter_keywords($words="") {
    
    	// force to lowercase and swop % into a safer version
    	
    	$words = trim( strtolower( str_replace( "%", "\\%", $words) ) );
    	
    	// Remove trailing boolean operators
    	
    	$words = preg_replace( "/\s+(and|or)$/" , "" , $words );
    	
    	// Swop wildcard into *SQL percent
    	
    	$words = str_replace( "*", "%", $words );
    	
    	// Make safe underscores
    	
    	$words = str_replace( "_", "\\_", $words );
    	
    	// Remove crap
    	
    	$words = preg_replace( "/[\|\[\]\{\}\(\)\.,:;\?\-\+\#\\\\\/\"']/", "", $words );
    	
    	return " ".preg_quote($words)." ";
    
    }
        
    
    //------------------------------------------------------
    // Make the hl words nice and stuff
    //------------------------------------------------------
    
    function convert_highlite_words($words="")
    {
    	$words = trim(urldecode($words));
    	
    	// Convert booleans to something easy to match next time around
    	
    	$words = preg_replace("/\s+(and|or)(\s+|$)/i", ",\\1,", $words);
    	
    	// Convert spaces to plus signs
    	
    	$words = preg_replace("/\s/", "+", $words);
    	
    	return $words;
    }
        
    //------------------------------------------------------
    // Get the searchable forums
    //------------------------------------------------------    
        
    function get_searchable_forums() {
    	global $ibforums, $DB, $std, $HTTP_POST_VARS;
    	
    	$forum_array  = array();
    	$forum_string = "";
    	$sql_query    = "";
    	// If we have an array of "forums", loop
    	// through and build our *SQL IN( ) statement.
    	
    	
    	// Are we looking for cats or forums..
    	
    	if ($ibforums->input['cat_forum'] == 'cat')
    	{
    		if ($ibforums->input['cats'] == 'all')
    		{
    			$sql_query = "SELECT id, read_perms, password from ibf_forums";
    		} 
    		else
    		{
    			if (! preg_match( "/^(?:\d+)$/", $ibforums->input['cats'] ) )
    			{
    				return;
    			}
    			else
    			{
    				$sql_query = "SELECT id, read_perms, password from ibf_forums WHERE category='".$ibforums->input['cats']."'";
    			}
    		}
    	}
    	else
    	{
    		if ($ibforums->input['forums'] == 'all')
    		{
    			$sql_query = "SELECT id, read_perms, password from ibf_forums";
    		}
    		else
    		{
    			if (! preg_match( "/^(?:\d+)$/", $ibforums->input['forums'] ) )
    			{
    				return;
    			}
    			else
    			{
    				$sql_query = "SELECT id, read_perms, password from ibf_forums WHERE id='".$ibforums->input['forums']."'";
    			}
    		}
    	}
    	
    	if ($sql_query != "")
    	{
    		$DB->query( $sql_query );
    		
			while ($i = $DB->fetch_row())
			{
				$pass = 1;
				
				if ($i['password'] != "")
				{
					if ( ! $c_pass = $std->my_getcookie('iBForum'.$i['id']) )
					{
						$pass = 0;
					}
				
					if ( $c_pass == $i['password'] )
					{
						$pass = 1;
					}
				}
				
				if ($pass == 1)
				{
					if ($i['read_perms'] == '*')
					{
						$forum_array[] = $i['id'];
					}
					else if ( preg_match( "/(^|,)".$ibforums->member['mgroup']."(,|$)/", $i['read_perms']) )
					{
						$forum_array[] = $i['id'];
					}
				}
			}
		}
    					
    	$forum_string = implode( "," , $forum_array );
    	
    	return $forum_string;
    	
    }
        
        
        
        
        
}

?>