leftypol/inc/functions.php

<?php

/*
 *  Copyright (c) 2010-2012 Tinyboard Development Group
 */

if(realpath($_SERVER['SCRIPT_FILENAME']) == str_replace('\\', '/', __FILE__)) {
	// You cannot request this file directly.
	exit;
}

require_once 'inc/display.php';
require_once 'inc/template.php';
require_once 'inc/database.php';
require_once 'inc/events.php';
require_once 'inc/anti-bot.php';
require_once 'inc/lib/gettext/gettext.inc';

// the user is not currently logged in as a moderator
$mod = false;

register_shutdown_function('fatal_error_handler');
mb_internal_encoding('UTF-8');
loadConfig();

function loadConfig() {
	global $board, $config, $__ip, $debug, $__version;
	
	$error = function_exists('error') ? 'error' : 'basic_error_function_because_the_other_isnt_loaded_yet';
	
	reset_events();
	
	if(!isset($_SERVER['REMOTE_ADDR']))
		$_SERVER['REMOTE_ADDR'] = '0.0.0.0';
	
	$arrays = array('db', 'cache', 'cookies', 'error', 'dir', 'mod', 'spam', 'flood_filters', 'wordfilters', 'custom_capcode', 'custom_tripcode', 'dnsbl', 'dnsbl_exceptions', 'remote', 'allowed_ext', 'allowed_ext_files', 'file_icons', 'footer', 'stylesheets', 'additional_javascript', 'markup');
	
	$config = array();
	foreach($arrays as $key) {
		$config[$key] = array();
	}
	
	require 'inc/config.php';
	if(!file_exists('inc/instance-config.php'))
		$error('Tinyboard is not configured! Create inc/instance-config.php.');
	
	require 'inc/instance-config.php';
	
	if(isset($board['dir']) && file_exists($board['dir'] . '/config.php')) {
		require $board['dir'] . '/config.php';
	}
	
	if(!isset($__version))
		$__version = file_exists('.installed') ? trim(file_get_contents('.installed')) : false;
	$config['version'] = $__version;
	
	if($config['debug']) {
		if(!isset($debug)) {
			$debug = array('sql' => array(), 'purge' => array(), 'cached' => array());
			$debug['start'] = microtime(true);
		}
	}
	
	date_default_timezone_set($config['timezone']);
	
	if(!isset($config['blotter']))
		$config['blotter'] = false;
	
	if(!isset($config['post_url']))
		$config['post_url'] = $config['root'] . $config['file_post'];
	
	if(!isset($config['referer_match']))
		if(isset($_SERVER['HTTP_HOST'])) {
			$config['referer_match'] = '/^' .
				(preg_match($config['url_regex'], $config['root']) ? '' :
					'https?:\/\/' . $_SERVER['HTTP_HOST']) .
					preg_quote($config['root'], '/') .
				'(' .
						str_replace('%s', '\w+', preg_quote($config['board_path'], '/')) .
						'(' .
							preg_quote($config['file_index'], '/') . '|' .
							str_replace('%d', '\d+', preg_quote($config['file_page'])) .
						')?' .
					'|' .
						str_replace('%s', '\w+', preg_quote($config['board_path'], '/')) .
						preg_quote($config['dir']['res'], '/') .
						str_replace('%d', '\d+', preg_quote($config['file_page'], '/')) .
					'|' .
						preg_quote($config['file_mod'], '/') . '\?\/.+' .
				')([#?](.+)?)?$/i';
		} else {
			// CLI mode
			$config['referer_match'] = '//';
		}
	if(!isset($config['cookies']['path']))
		$config['cookies']['path'] = &$config['root'];
		
	if(!isset($config['dir']['static']))
		$config['dir']['static'] = $config['root'] . 'static/';
	
	if(!isset($config['image_sticky']))
		$config['image_sticky'] = $config['dir']['static'] . 'sticky.gif';
	if(!isset($config['image_locked']))
		$config['image_locked'] = $config['dir']['static'] . 'locked.gif';
	if(!isset($config['image_bumplocked']))
		$config['image_bumplocked'] = $config['dir']['static'] . 'sage.gif';
	if(!isset($config['image_deleted']))
		$config['image_deleted'] = $config['dir']['static'] . 'deleted.png';
	if(!isset($config['image_zip']))
		$config['image_zip'] = $config['dir']['static'] . 'zip.png';
	
	if(!isset($config['uri_thumb']))
		$config['uri_thumb'] = $config['root'] . $board['dir'] . $config['dir']['thumb'];
	elseif(isset($board['dir']))
		$config['uri_thumb'] = sprintf($config['uri_thumb'], $board['dir']);
	
	if(!isset($config['uri_img']))
		$config['uri_img'] = $config['root'] . $board['dir'] . $config['dir']['img'];
	elseif(isset($board['dir']))
		$config['uri_img'] = sprintf($config['uri_img'], $board['dir']);
	
	if(!isset($config['uri_stylesheets']))
		$config['uri_stylesheets'] = $config['root'] . 'stylesheets/';
	
	if(!isset($config['url_stylesheet']))
		$config['url_stylesheet'] = $config['uri_stylesheets'] . 'style.css';
	if(!isset($config['url_javascript']))
		$config['url_javascript'] = $config['root'] . $config['file_script'];
	if(!isset($config['additional_javascript_url']))
		$config['additional_javascript_url'] = $config['root'];
	
	if($config['root_file']) {
		chdir($config['root_file']);
	}

	if($config['verbose_errors']) {
		error_reporting(E_ALL);
		ini_set('display_errors', 1);
	}
	
	// Keep the original address to properly comply with other board configurations
	if(!isset($__ip))
		$__ip = $_SERVER['REMOTE_ADDR'];
	
	// ::ffff:0.0.0.0
	if(preg_match('/^\:\:(ffff\:)?(\d+\.\d+\.\d+\.\d+)$/', $__ip, $m))
		$_SERVER['REMOTE_ADDR'] = $m[2];
	
	if(_setlocale(LC_ALL, $config['locale']) === false) {
		$error('The specified locale (' . $config['locale'] . ') does not exist on your platform!');
	}
	
	if(extension_loaded('gettext')) {
		bindtextdomain('tinyboard', './inc/locale');
		bind_textdomain_codeset('tinyboard', 'UTF-8');
		textdomain('tinyboard');
	} else {
		_bindtextdomain('tinyboard', './inc/locale');
		_bind_textdomain_codeset('tinyboard', 'UTF-8');
		_textdomain('tinyboard');
	}
	
	
	if($config['syslog'])
		openlog('tinyboard', LOG_ODELAY, LOG_SYSLOG); // open a connection to sysem logger
	
	if($config['recaptcha'])
		require_once 'inc/lib/recaptcha/recaptchalib.php';
	if($config['cache']['enabled'])
		require_once 'inc/cache.php';
}

function basic_error_function_because_the_other_isnt_loaded_yet($message, $priority = true) {
	global $config;
	
	if($config['syslog'] && $priority !== false) {
		// Use LOG_NOTICE instead of LOG_ERR or LOG_WARNING because most error message are not significant.
		_syslog($priority !== true ? $priority : LOG_NOTICE, $message);
	}
	
	// Yes, this is horrible.
	die('<!DOCTYPE html><html><head><title>Error</title>' .
		'<style type="text/css">' .
			'body{text-align:center;font-family:arial, helvetica, sans-serif;font-size:10pt;}' .
			'p{padding:0;margin:20px 0;}' .
			'p.c{font-size:11px;}' .
		'</style></head>' .
		'<body><h2>Error</h2>' . $message . '<hr/>' .
		'<p class="c">This alternative error page is being displayed because the other couldn\'t be found or hasn\'t loaded yet.</p></body></html>');
}

function fatal_error_handler() { 
	if($error = error_get_last()) {
		if($error['type'] == E_ERROR) {
			if(function_exists('error')) {
				error('Caught fatal error: ' . $error['message'] . ' in <strong>' . $error['file'] . '</strong> on line ' . $error['line'], LOG_ERR);
			} else {
				basic_error_function_because_the_other_isnt_loaded_yet('Caught fatal error: ' . $error['message'] . ' in ' . $error['file'] . ' on line ' . $error['line'], LOG_ERR);
			}
		}
	}
}

function _syslog($priority, $message) {
	if(isset($_SERVER['REMOTE_ADDR'], $_SERVER['REQUEST_METHOD'], $_SERVER['REQUEST_URI'])) {
		// CGI
		syslog($priority, $message . ' - client: ' . $_SERVER['REMOTE_ADDR'] . ', request: "' . $_SERVER['REQUEST_METHOD'] . ' ' . $_SERVER['REQUEST_URI'] . '"');
	} else {
		syslog($priority, $message);
	}
}


function rebuildThemes($action) {
	// List themes
	$query = query("SELECT `theme` FROM `theme_settings` WHERE `name` IS NULL AND `value` IS NULL") or error(db_error());
	while($theme = $query->fetch()) {
		rebuildTheme($theme['theme'], $action);
	}
}


function loadThemeConfig($_theme) {
	global $config;

	if(!file_exists($config['dir']['themes'] . '/' . $_theme . '/info.php'))
		return false;

	// Load theme information into $theme
	include $config['dir']['themes'] . '/' . $_theme . '/info.php';

	return $theme;
}

function rebuildTheme($theme, $action) {
	global $config, $_theme;
	$_theme = $theme;

	$theme = loadThemeConfig($_theme);

	if(file_exists($config['dir']['themes'] . '/' . $_theme . '/theme.php')) {
		require_once $config['dir']['themes'] . '/' . $_theme . '/theme.php';
	
		$theme['build_function']($action, themeSettings($_theme));
	}
}


function themeSettings($theme) {
	$query = prepare("SELECT `name`, `value` FROM `theme_settings` WHERE `theme` = :theme AND `name` IS NOT NULL");
	$query->bindValue(':theme', $theme);
	$query->execute() or error(db_error($query));

	$settings = array();
	while($s = $query->fetch()) {
		$settings[$s['name']] = $s['value'];
	}

	return $settings;
}

function sprintf3($str, $vars, $delim = '%') {
	$replaces = array();
	foreach($vars as $k => $v) {
		$replaces[$delim . $k . $delim] = $v;
	}
	return str_replace(array_keys($replaces),
	                   array_values($replaces), $str);
}

function setupBoard($array) {
	global $board, $config;
	
	$board = array(
	'id' => $array['id'],
	'uri' => $array['uri'],
	'name' => $array['title'],
	'title' => $array['subtitle']);
	
	$board['dir'] = sprintf($config['board_path'], $board['uri']);
	$board['url'] = sprintf($config['board_abbreviation'], $board['uri']);
	
	loadConfig();
	
	if(!file_exists($board['dir']))
		mkdir($board['dir'], 0777) or error("Couldn't create " . $board['dir'] . ". Check permissions.", true);
	if(!file_exists($board['dir'] . $config['dir']['img']))
		@mkdir($board['dir'] . $config['dir']['img'], 0777) or error("Couldn't create " . $board['dir'] . $config['dir']['img'] . ". Check permissions.", true);
	if(!file_exists($board['dir'] . $config['dir']['thumb']))
		@mkdir($board['dir'] . $config['dir']['thumb'], 0777) or error("Couldn't create " . $board['dir'] . $config['dir']['img'] . ". Check permissions.", true);
	if(!file_exists($board['dir'] . $config['dir']['res']))
		@mkdir($board['dir'] . $config['dir']['res'], 0777) or error("Couldn't create " . $board['dir'] . $config['dir']['img'] . ". Check permissions.", true);
}

function openBoard($uri) {
	global $config;
	if($config['cache']['enabled'] && ($board = cache::get('board_' . $uri))) {
		setupBoard($board);
		return true;
	}
	
	$query = prepare("SELECT * FROM `boards` WHERE `uri` = :uri LIMIT 1");
	$query->bindValue(':uri', $uri);
	$query->execute() or error(db_error($query));
	
	if($board = $query->fetch()) {
		if($config['cache']['enabled'])
			cache::set('board_' . $uri, $board);
		setupBoard($board);
		return true;
	} else return false;
}

function boardTitle($uri) {
	global $config;
	if($config['cache']['enabled'] && ($board = cache::get('board_' . $uri))) {
		return $board['title'];
	}
	
	$query = prepare("SELECT `title` FROM `boards` WHERE `uri` = :uri LIMIT 1");
	$query->bindValue(':uri', $uri);
	$query->execute() or error(db_error($query));
	
	if($title = $query->fetch()) {
		return $title['title'];
	} else return false;
}

function purge($uri) {
	global $config, $debug;
	if(preg_match($config['referer_match'], $config['root'])) {
		$uri = (str_replace('\\', '/', dirname($_SERVER['REQUEST_URI'])) == '/' ? '/' : str_replace('\\', '/', dirname($_SERVER['REQUEST_URI'])) . '/') . $uri;
	} else {
		$uri = $config['root'] . $uri;
	}
	
	if($config['debug']) {
		$debug['purge'][] = $uri;
	}
			
	foreach($config['purge'] as &$purge) {
		$host = &$purge[0];
		$port = &$purge[1];
		$http_host = isset($purge[2]) ? $purge[2] : $_SERVER['HTTP_HOST'];
		$request = "PURGE {$uri} HTTP/1.1\r\nHost: {$http_host}\r\nUser-Agent: Tinyboard\r\nConnection: Close\r\n\r\n";
		if($fp = fsockopen($host, $port, $errno, $errstr, $config['purge_timeout'])) {
			fwrite($fp, $request);
			fclose($fp);
		} else {
			// Cannot connect?
			error('Could not PURGE for ' . $host);
		}
	}
}

function file_write($path, $data, $simple = false, $skip_purge = false) {
	global $config;
	
	if(preg_match('/^remote:\/\/(.+)\:(.+)$/', $path, $m)) {
		if(isset($config['remote'][$m[1]])) {
			require_once 'inc/remote.php';
			
			$remote = new Remote($config['remote'][$m[1]]);
			$remote->write($data, $m[2]);
			return;
		} else {
			error('Invalid remote server: ' . $m[1]);
		}
	}
	
	if(!$fp = fopen($path, $simple ? 'w' : 'c'))
		error('Unable to open file for writing: ' . $path);
	
	// File locking
	if(!$simple && !flock($fp, LOCK_EX)) {
		error('Unable to lock file: ' . $path);
	}
	
	// Truncate file
	if(!$simple && !ftruncate($fp, 0))
		error('Unable to truncate file: ' . $path);
		
	// Write data
	if(fwrite($fp, $data) === false)
		error('Unable to write to file: ' . $path);
	
	// Unlock
	if(!$simple)
		flock($fp, LOCK_UN);
	
	// Close
	if(!fclose($fp))
		error('Unable to close file: ' . $path);
	
	if(!$skip_purge && isset($config['purge']) && isset($_SERVER['HTTP_HOST'])) {
		// Purge cache
		if(basename($path) == $config['file_index']) {
			// Index file (/index.html); purge "/" as well
			$uri = dirname($path);
			// root
			if($uri == '.')
				$uri = '';
			else
				$uri .= '/';
			purge($uri);
		}
		purge($path);
	}
	
	event('write', $path);
}

function file_unlink($path) {
	global $config, $debug;
	
	if($config['debug']) {
		if(!isset($debug['unlink']))
			$debug['unlink'] = array();
		$debug['unlink'][] = $path;
	}
	
	$ret = @unlink($path);
	if(isset($config['purge']) && $path[0] != '/' && isset($_SERVER['HTTP_HOST'])) {
		// Purge cache
		if(basename($path) == $config['file_index']) {
			// Index file (/index.html); purge "/" as well
			$uri = dirname($path);
			// root
			if($uri == '.')
				$uri = '';
			else
				$uri .= '/';
			purge($uri);
		}
		purge($path);
	}
	
	event('unlink', $path);
	
	return $ret;
}

function hasPermission($action = null, $board = null, $_mod = null) {
	global $config;
		
	if(isset($_mod))
		$mod = &$_mod;
	else
		global $mod;
	
	if(!is_array($mod))
		return false;
	
	if(isset($action) && $mod['type'] < $action)
		return false;
	
	if(!isset($board) || $config['mod']['skip_per_board'])
		return true;
	
	if(!isset($mod['boards']))
		return false;
	
	if(!in_array('*', $mod['boards']) && !in_array($board, $mod['boards']))
		return false;
	
	return true;
}

function listBoards() {
	global $config;
	
	if($config['cache']['enabled'] && ($boards = cache::get('all_boards')))
		return $boards;
	
	$query = query("SELECT * FROM `boards` ORDER BY `uri`") or error(db_error());
	$boards = $query->fetchAll();
	
	if($config['cache']['enabled'])
		cache::set('all_boards', $boards);
	
	return $boards;
}

function checkFlood($post) {
	global $board, $config;
	
	$query = prepare(sprintf("SELECT * FROM `posts_%s` WHERE (`ip` = :ip AND `time` >= :floodtime) OR (`ip` = :ip AND `body` != '' AND `body` = :body AND `time` >= :floodsameiptime) OR (`body` != ''  AND `body` = :body AND `time` >= :floodsametime) LIMIT 1", $board['uri']));
	$query->bindValue(':ip', $_SERVER['REMOTE_ADDR']);
	$query->bindValue(':body', $post['body'], PDO::PARAM_INT);
	$query->bindValue(':floodtime', time()-$config['flood_time'], PDO::PARAM_INT);
	$query->bindValue(':floodsameiptime', time()-$config['flood_time_ip'], PDO::PARAM_INT);
	$query->bindValue(':floodsametime', time()-$config['flood_time_same'], PDO::PARAM_INT);
	$query->execute() or error(db_error($query));
	
	$flood = (bool)$query->fetch();
	
	if(event('check-flood', $post))
		return true;
	
	return $flood;
}

function until($timestamp) {
	$difference = $timestamp - time();
	if($difference < 60) {
		return $difference . ' second' . ($difference != 1 ? 's' : '');
	} elseif($difference < 60*60) {
		return ($num = round($difference/(60))) . ' minute' . ($num != 1 ? 's' : '');
	} elseif($difference < 60*60*24) {
		return ($num = round($difference/(60*60))) . ' hour' . ($num != 1 ? 's' : '');
	} elseif($difference < 60*60*24*7) {
		return ($num = round($difference/(60*60*24))) . ' day' . ($num != 1 ? 's' : '');
	} elseif($difference < 60*60*24*365) {
		return ($num = round($difference/(60*60*24*7))) . ' week' . ($num != 1 ? 's' : '');
	} else {
		return ($num = round($difference/(60*60*24*365))) . ' year' . ($num != 1 ? 's' : '');
	}
}

function ago($timestamp) {
	$difference = time() - $timestamp;
	if($difference < 60) {
		return $difference . ' second' . ($difference != 1 ? 's' : '');
	} elseif($difference < 60*60) {
		return ($num = round($difference/(60))) . ' minute' . ($num != 1 ? 's' : '');
	} elseif($difference < 60*60*24) {
		return ($num = round($difference/(60*60))) . ' hour' . ($num != 1 ? 's' : '');
	} elseif($difference < 60*60*24*7) {
		return ($num = round($difference/(60*60*24))) . ' day' . ($num != 1 ? 's' : '');
	} elseif($difference < 60*60*24*365) {
		return ($num = round($difference/(60*60*24*7))) . ' week' . ($num != 1 ? 's' : '');
	} else {
		return ($num = round($difference/(60*60*24*365))) . ' year' . ($num != 1 ? 's' : '');
	}
}

function displayBan($ban) {
	global $config;
	
	$ban['ip'] = $_SERVER['REMOTE_ADDR'];
	
	// Show banned page and exit
	die(
		Element('page.html', array(
			'title' => 'Banned!',
			'config' => $config,
			'body' => Element('banned.html', array(
				'config' => $config,
				'ban' => $ban
			)
		))
	));
}

function checkBan($board = 0) {
	global $config;
	
	if(!isset($_SERVER['REMOTE_ADDR'])) {
		// Server misconfiguration
		return;
	}		
	
	if(event('check-ban', $board))
		return true;
	
	$query = prepare("SELECT `set`, `expires`, `reason`, `board`, `uri`, `bans`.`id` FROM `bans` LEFT JOIN `boards` ON `boards`.`id` = `board` WHERE (`board` IS NULL OR `uri` = :board) AND `ip` = :ip ORDER BY `expires` IS NULL DESC, `expires` DESC, `expires` DESC LIMIT 1");
	$query->bindValue(':ip', $_SERVER['REMOTE_ADDR']);
	$query->bindValue(':board', $board);
	$query->execute() or error(db_error($query));
	if($query->rowCount() < 1 && $config['ban_range']) {
		$query = prepare("SELECT `set`, `expires`, `reason`, `board`, `uri`, `bans`.`id` FROM `bans` LEFT JOIN `boards` ON `boards`.`id` = `board` WHERE (`board` IS NULL OR `uri` = :board) AND :ip LIKE REPLACE(REPLACE(`ip`, '%', '!%'), '*', '%') ESCAPE '!' ORDER BY `expires` IS NULL DESC, `expires` DESC LIMIT 1");
		$query->bindValue(':ip', $_SERVER['REMOTE_ADDR']);
		$query->bindValue(':board', $board);
		$query->execute() or error(db_error($query));
	}
	
	if($query->rowCount() < 1 && $config['ban_cidr'] && !isIPv6()) {
		// my most insane SQL query yet
		$query = prepare("SELECT `set`, `expires`, `reason`, `board`, `uri`, `bans`.`id` FROM `bans` LEFT JOIN `boards` ON `boards`.`id` = `board` WHERE (`board` IS NULL OR `uri` = :board)
			AND (					
				`ip` REGEXP '^(\[0-9]+\.\[0-9]+\.\[0-9]+\.\[0-9]+\)\/(\[0-9]+)$'
					AND
				:ip >= INET_ATON(SUBSTRING_INDEX(`ip`, '/', 1))
					AND
				:ip < INET_ATON(SUBSTRING_INDEX(`ip`, '/', 1)) + POW(2, 32 - SUBSTRING_INDEX(`ip`, '/', -1))
			)
			ORDER BY `expires` IS NULL DESC, `expires` DESC LIMIT 1");
		$query->bindValue(':ip', ip2long($_SERVER['REMOTE_ADDR']));
		$query->bindValue(':board', $board);
		$query->execute() or error(db_error($query));
	}
	
	if($ban = $query->fetch()) {
		if($ban['expires'] && $ban['expires'] < time()) {
			// Ban expired
			$query = prepare("DELETE FROM `bans` WHERE `id` = :id LIMIT 1");
			$query->bindValue(':id', $ban['id'], PDO::PARAM_INT);
			$query->execute() or error(db_error($query));
			
			return;
		}
		
		displayBan($ban);
	}
}

function threadLocked($id) {
	global $board;
	
	if(event('check-locked', $id))
		return true;
	
	$query = prepare(sprintf("SELECT `locked` FROM `posts_%s` WHERE `id` = :id AND `thread` IS NULL LIMIT 1", $board['uri']));
	$query->bindValue(':id', $id, PDO::PARAM_INT);
	$query->execute() or error(db_error());
	
	if(!$post = $query->fetch()) {
		// Non-existant, so it can't be locked...
		return false;
	}
	
	return (bool)$post['locked'];
}

function threadSageLocked($id) {
	global $board;
	
	if(event('check-sage-locked', $id))
		return true;
	
	$query = prepare(sprintf("SELECT `sage` FROM `posts_%s` WHERE `id` = :id AND `thread` IS NULL LIMIT 1", $board['uri']));
	$query->bindValue(':id', $id, PDO::PARAM_INT);
	$query->execute() or error(db_error());
	
	if(!$post = $query->fetch()) {
		// Non-existant, so it can't be locked...
		return false;
	}
	
	return (bool) $post['sage'];
}

function threadExists($id) {
	global $board;
	
	$query = prepare(sprintf("SELECT 1 FROM `posts_%s` WHERE `id` = :id AND `thread` IS NULL LIMIT 1", $board['uri']));
	$query->bindValue(':id', $id, PDO::PARAM_INT);
	$query->execute() or error(db_error());
	
	if($query->rowCount()) {
		return true;
	} else return false;
}

function post(array $post) {
	global $pdo, $board;
	$query = prepare(sprintf("INSERT INTO `posts_%s` VALUES ( NULL, :thread, :subject, :email, :name, :trip, :capcode, :body, :body_nomarkup, :time, :time, :thumb, :thumbwidth, :thumbheight, :file, :width, :height, :filesize, :filename, :filehash, :password, :ip, :sticky, :locked, 0, :embed)", $board['uri']));
	
	// Basic stuff
	if(!empty($post['subject'])) {
		$query->bindValue(':subject', $post['subject']);
	} else {
		$query->bindValue(':subject', NULL, PDO::PARAM_NULL);
	}
	
	if(!empty($post['email'])) {
		$query->bindValue(':email', $post['email']);
	} else {
		$query->bindValue(':email', NULL, PDO::PARAM_NULL);
	}
	
	if(!empty($post['trip'])) {
		$query->bindValue(':trip', $post['trip']);
	} else {
		$query->bindValue(':trip', NULL, PDO::PARAM_NULL);
	}
	
	$query->bindValue(':name', $post['name']);
	$query->bindValue(':body', $post['body']);
	$query->bindValue(':body_nomarkup', $post['body_nomarkup']);
	$query->bindValue(':time', isset($post['time']) ? $post['time'] : time(), PDO::PARAM_INT);
	$query->bindValue(':password', $post['password']);		
	$query->bindValue(':ip', isset($post['ip']) ? $post['ip'] : $_SERVER['REMOTE_ADDR']);
	
	if($post['mod'] && $post['sticky']) {
		$query->bindValue(':sticky', 1, PDO::PARAM_INT);
	} else {
		$query->bindValue(':sticky', 0, PDO::PARAM_INT);
	}
	
	if($post['mod'] && $post['locked']) {
		$query->bindValue(':locked', 1, PDO::PARAM_INT);
	} else {
		$query->bindValue(':locked', 0, PDO::PARAM_INT);
	}
	
	if($post['mod'] && isset($post['capcode']) && $post['capcode']) {
		$query->bindValue(':capcode', $post['capcode'], PDO::PARAM_INT);
	} else {
		$query->bindValue(':capcode', NULL, PDO::PARAM_NULL);
	}
	
	if(!empty($post['embed'])) {
		$query->bindValue(':embed', $post['embed']);
	} else {
		$query->bindValue(':embed', NULL, PDO::PARAM_NULL);
	}
	
	if($post['op']) {
		// No parent thread, image
		$query->bindValue(':thread', null, PDO::PARAM_NULL);
	} else {
		$query->bindValue(':thread', $post['thread'], PDO::PARAM_INT);
	}
	
	if($post['has_file']) {
		$query->bindValue(':thumb', $post['thumb']);
		$query->bindValue(':thumbwidth', $post['thumbwidth'], PDO::PARAM_INT);
		$query->bindValue(':thumbheight', $post['thumbheight'], PDO::PARAM_INT);
		$query->bindValue(':file', $post['file']);
		
		if(isset($post['width'], $post['height'])) {
			$query->bindValue(':width', $post['width'], PDO::PARAM_INT);
			$query->bindValue(':height', $post['height'], PDO::PARAM_INT);
		} else {
			$query->bindValue(':width', null, PDO::PARAM_NULL);
			$query->bindValue(':height', null, PDO::PARAM_NULL);
		}
		
		$query->bindValue(':filesize', $post['filesize'], PDO::PARAM_INT);
		$query->bindValue(':filename', $post['filename']);
		$query->bindValue(':filehash', $post['filehash']);
	} else {
		$query->bindValue(':thumb', null, PDO::PARAM_NULL);
		$query->bindValue(':thumbwidth', null, PDO::PARAM_NULL);
		$query->bindValue(':thumbheight', null, PDO::PARAM_NULL);
		$query->bindValue(':file', null, PDO::PARAM_NULL);
		$query->bindValue(':width', null, PDO::PARAM_NULL);
		$query->bindValue(':height', null, PDO::PARAM_NULL);
		$query->bindValue(':filesize', null, PDO::PARAM_NULL);
		$query->bindValue(':filename', null, PDO::PARAM_NULL);
		$query->bindValue(':filehash', null, PDO::PARAM_NULL);
	}
	
	if(!$query->execute()) {
		undoImage($post);
		error(db_error($query));
	}
	
	return $pdo->lastInsertId();
}

function bumpThread($id) {
	global $board;
	
	if(event('bump', $id))
		return true;
	
	$query = prepare(sprintf("UPDATE `posts_%s` SET `bump` = :time WHERE `id` = :id AND `thread` IS NULL", $board['uri']));
	$query->bindValue(':time', time(), PDO::PARAM_INT);
	$query->bindValue(':id', $id, PDO::PARAM_INT);
	$query->execute() or error(db_error($query));
}

// Remove file from post
function deleteFile($id, $remove_entirely_if_already=true) {
	global $board, $config;
	
	$query = prepare(sprintf("SELECT `thread`,`thumb`,`file` FROM `posts_%s` WHERE `id` = :id LIMIT 1", $board['uri']));
	$query->bindValue(':id', $id, PDO::PARAM_INT);
	$query->execute() or error(db_error($query));
	
	if($query->rowCount() < 1) {
		error($config['error']['invalidpost']);
	}
	
	$post = $query->fetch();
	
	if($post['file'] == 'deleted' && !$post['thread'])
		return; // Can't delete OP's image completely.
	
	$query = prepare(sprintf("UPDATE `posts_%s` SET `thumb` = NULL, `thumbwidth` = NULL, `thumbheight` = NULL, `filewidth` = NULL, `fileheight` = NULL, `filesize` = NULL, `filename` = NULL, `filehash` = NULL, `file` = :file WHERE `id` = :id", $board['uri']));
	if($post['file'] == 'deleted' && $remove_entirely_if_already) {
		// Already deleted; remove file fully
		$query->bindValue(':file', null, PDO::PARAM_NULL);
	} else {
		// Delete thumbnail
		file_unlink($board['dir'] . $config['dir']['thumb'] . $post['thumb']);
		
		// Delete file
		file_unlink($board['dir'] . $config['dir']['img'] . $post['file']);
		
		// Set file to 'deleted'
		$query->bindValue(':file', 'deleted', PDO::PARAM_INT);
	}
	// Update database
	
	$query->bindValue(':id', $id, PDO::PARAM_INT);
	$query->execute() or error(db_error($query));
	
	if($post['thread'])
		buildThread($post['thread']);
}

// rebuild post (markup)
function rebuildPost($id) {
	global $board;
	
	$query = prepare(sprintf("SELECT `body_nomarkup`, `thread` FROM `posts_%s` WHERE `id` = :id", $board['uri']));
	$query->bindValue(':id', $id, PDO::PARAM_INT);
	$query->execute() or error(db_error($query));
	
	if(!$post = $query->fetch())
		return false;
	
	if(!$post['body_nomarkup'])
		return false;
	
	markup($body = &$post['body_nomarkup']);
	
	$query = prepare(sprintf("UPDATE `posts_%s` SET `body` = :body WHERE `id` = :id", $board['uri']));
	$query->bindValue(':body', $body);
	$query->bindValue(':id', $id, PDO::PARAM_INT);
	$query->execute() or error(db_error($query));
	
	buildThread($post['thread'] ? $post['thread'] : $id);
	
	return true;
}

// Delete a post (reply or thread)
function deletePost($id, $error_if_doesnt_exist=true, $rebuild_after=true) {
	global $board, $config;
	
	// Select post and replies (if thread) in one query
	$query = prepare(sprintf("SELECT `id`,`thread`,`thumb`,`file` FROM `posts_%s` WHERE `id` = :id OR `thread` = :id", $board['uri']));
	$query->bindValue(':id', $id, PDO::PARAM_INT);
	$query->execute() or error(db_error($query));
	
	if($query->rowCount() < 1) {
		if($error_if_doesnt_exist)
			error($config['error']['invalidpost']);
		else return false;
	}
	
	$ids = array();
	
	// Delete posts and maybe replies
	while($post = $query->fetch()) {
		if(!$post['thread']) {
			// Delete thread HTML page
			file_unlink($board['dir'] . $config['dir']['res'] . sprintf($config['file_page'], $post['id']));
		} elseif($query->rowCount() == 1) {
			// Rebuild thread
			$rebuild = &$post['thread'];
		}
		if($post['thumb']) {
			// Delete thumbnail
			file_unlink($board['dir'] . $config['dir']['thumb'] . $post['thumb']);
		}
		if($post['file']) {
			// Delete file
			file_unlink($board['dir'] . $config['dir']['img'] . $post['file']);
		}
		
		$ids[] = (int)$post['id'];
		
	}
	
	$query = prepare(sprintf("DELETE FROM `posts_%s` WHERE `id` = :id OR `thread` = :id", $board['uri']));
	$query->bindValue(':id', $id, PDO::PARAM_INT);
	$query->execute() or error(db_error($query));
	
	$query = prepare("SELECT `board`, `post` FROM `cites` WHERE `target_board` = :board AND (`target` = " . implode(' OR `target` = ', $ids) . ")");
	$query->bindValue(':board', $board['uri']);
	$query->execute() or error(db_error($query));
	while($cite = $query->fetch()) {
		if($board['uri'] != $cite['board']) {
			if(!isset($tmp_board))
				$tmp_board = $board['uri'];
			openBoard($cite['board']);
		}
		rebuildPost($cite['post']);
	}
	
	if(isset($tmp_board))
		openBoard($tmp_board);
	
	$query = prepare("DELETE FROM `cites` WHERE (`target_board` = :board AND `target` = :id) OR (`board` = :board AND `post` = :id)");
	$query->bindValue(':board', $board['uri']);
	$query->bindValue(':id', $id, PDO::PARAM_INT);
	$query->execute() or error(db_error($query));

	if(isset($rebuild) && $rebuild_after) {
		buildThread($rebuild);
	}
	
	return true;
}

function clean() {
	global $board, $config;
	$offset = round($config['max_pages']*$config['threads_per_page']);
	
	// I too wish there was an easier way of doing this...
	$query = prepare(sprintf("SELECT `id` FROM `posts_%s` WHERE `thread` IS NULL ORDER BY `sticky` DESC, `bump` DESC LIMIT :offset, 9001", $board['uri']));
	$query->bindValue(':offset', $offset, PDO::PARAM_INT);
	
	$query->execute() or error(db_error($query));
	while($post = $query->fetch()) {
		deletePost($post['id']);
	}
}

function index($page, $mod=false) {
	global $board, $config, $debug;

	$body = '';
	$offset = round($page*$config['threads_per_page']-$config['threads_per_page']);
	
	$query = prepare(sprintf("SELECT * FROM `posts_%s` WHERE `thread` IS NULL ORDER BY `sticky` DESC, `bump` DESC LIMIT :offset,:threads_per_page", $board['uri']));
	$query->bindValue(':offset', $offset, PDO::PARAM_INT);
	$query->bindValue(':threads_per_page', $config['threads_per_page'], PDO::PARAM_INT);
	$query->execute() or error(db_error($query));
	
	if($query->rowcount() < 1 && $page > 1)
		return false;
	while($th = $query->fetch()) {
		if(!$mod && $config['cache']['enabled']) {
			if($built = cache::get("thread_index_{$board['uri']}_{$th['id']}")) {					
				$body .= $built;
				continue;
			}
		}
		
		$thread = new Thread(
			$th['id'], $th['subject'], $th['email'], $th['name'], $th['trip'], $th['capcode'], $th['body'], $th['time'], $th['thumb'],
			$th['thumbwidth'], $th['thumbheight'], $th['file'], $th['filewidth'], $th['fileheight'], $th['filesize'], $th['filename'], $th['ip'],
			$th['sticky'], $th['locked'], $th['sage'], $th['embed'], $mod ? '?/' : $config['root'], $mod
		);
		
		$posts = prepare(sprintf("SELECT * FROM `posts_%s` WHERE `thread` = :id ORDER BY `id` DESC LIMIT :limit", $board['uri']));
		$posts->bindValue(':id', $th['id']);
		$posts->bindValue(':limit', ($th['sticky'] ? $config['threads_preview_sticky'] : $config['threads_preview']), PDO::PARAM_INT);
		$posts->execute() or error(db_error($posts));
		
		$num_images = 0;
		while($po = $posts->fetch()) {
			if($po['file'])
				$num_images++;
			
			$thread->add(new Post(
				$po['id'], $th['id'], $po['subject'], $po['email'], $po['name'], $po['trip'], $po['capcode'], $po['body'], $po['time'],
				$po['thumb'], $po['thumbwidth'], $po['thumbheight'], $po['file'], $po['filewidth'], $po['fileheight'], $po['filesize'],
				$po['filename'], $po['ip'], $po['embed'], $mod ? '?/' : $config['root'], $mod)
			);
		}
		
		if($posts->rowCount() == ($th['sticky'] ? $config['threads_preview_sticky'] : $config['threads_preview'])) {
			$count = prepare(sprintf("SELECT COUNT(`id`) as `num` FROM `posts_%s` WHERE `thread` = :thread UNION ALL SELECT COUNT(`id`) FROM `posts_%s` WHERE `file` IS NOT NULL AND `thread` = :thread", $board['uri'], $board['uri']));
			$count->bindValue(':thread', $th['id'], PDO::PARAM_INT);
			$count->execute() or error(db_error($count));
			
			$c = $count->fetch();
			$thread->omitted = $c['num'] - ($th['sticky'] ? $config['threads_preview_sticky'] : $config['threads_preview']);
			
			$c = $count->fetch();
			$thread->omitted_images = $c['num'] - $num_images;
		}
		
		$thread->posts = array_reverse($thread->posts);
		
		$body .= $thread->build(true);
	}
	
	return array(
		'board'=>$board,
		'body'=>$body,
		'post_url' => $config['post_url'],
		'config' => $config,
		'boardlist' => createBoardlist($mod)
	);
}

function getPageButtons($pages, $mod=false) {
	global $config, $board;
	
	$btn = array();
	$root = ($mod ? '?/' : $config['root']) . $board['dir'];
	
	foreach($pages as $num => $page) {
		if(isset($page['selected'])) {
			// Previous button
			if($num == 0) {
				// There is no previous page.
				$btn['prev'] = _('Previous');
			} else {
				$loc = ($mod ? '?/' . $board['uri'] . '/' : '') .
					($num == 1 ?
						$config['file_index']
					:
						sprintf($config['file_page'], $num)
					);
				
				$btn['prev'] = '<form action="' . ($mod ? '' : $root . $loc) . '" method="get">' .
					($mod ?
						'<input type="hidden" name="status" value="301" />' .
						'<input type="hidden" name="r" value="' . htmlentities($loc) . '" />'
					:'') .
				'<input type="submit" value="' . _('Previous') . '" /></form>';
			}
			
			if($num == count($pages) - 1) {
				// There is no next page.
				$btn['next'] = _('Next');
			} else {
				$loc = ($mod ? '?/' . $board['uri'] . '/' : '') . sprintf($config['file_page'], $num + 2);
				
				$btn['next'] = '<form action="' . ($mod ? '' : $root . $loc) . '" method="get">' .
					($mod ?
						'<input type="hidden" name="status" value="301" />' .
						'<input type="hidden" name="r" value="' . htmlentities($loc) . '" />'
					:'') .
				'<input type="submit" value="' . _('Next') . '" /></form>';
			}
		}
	}
	
	return $btn;
}

function getPages($mod=false) {
	global $board, $config;
	
	// Count threads
	$query = query(sprintf("SELECT COUNT(`id`) as `num` FROM `posts_%s` WHERE `thread` IS NULL", $board['uri'])) or error(db_error());
	
	$count = current($query->fetch());
	$count = floor(($config['threads_per_page'] + $count - 1) / $config['threads_per_page']);
	
	if($count < 1) $count = 1;
	
	$pages = array();
	for($x=0;$x<$count && $x<$config['max_pages'];$x++) {
		$pages[] = array(
			'num' => $x+1,
			'link' => $x==0 ? ($mod ? '?/' : $config['root']) . $board['dir'] . $config['file_index'] : ($mod ? '?/' : $config['root']) . $board['dir'] . sprintf($config['file_page'], $x+1)
		);
	}
	
	return $pages;
}

function makerobot($body) {
	global $config;
	$body = strtolower($body);
	
	// Leave only letters
	$body = preg_replace('/[^a-z]/i', '', $body);
	// Remove repeating characters
	if($config['robot_strip_repeating'])
		$body = preg_replace('/(.)\\1+/', '$1', $body);
	
	return sha1($body);
}