functions.php

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<?php

if (!function_exists('_')) {
	function _($string) {
		return $string;
	}
}

if (!function_exists('floatval')) {
	function floatval($string) {
		return ((float) $string);
	}
}

function popuplinks($text) {
	// Comment text in popup windows should be filtered through this.
	// Right now it's a moderately dumb function, ideally it would detect whether
	// a target or rel attribute was already there and adjust its actions accordingly.
	$text = preg_replace('/<a (.+?)>/i', "<a $1 target='_blank' rel='external'>", $text);
	return $text;
}

function mysql2date($dateformatstring, $mysqlstring, $use_b2configmonthsdays = 1) {
	global $month, $weekday;
	$m = $mysqlstring;
	if (empty($m)) {
		return false;
	}
	$i = mktime(substr($m,11,2),substr($m,14,2),substr($m,17,2),substr($m,5,2),substr($m,8,2),substr($m,0,4)); 
	if (!empty($month) && !empty($weekday) && $use_b2configmonthsdays) {
		$datemonth = $month[date('m', $i)];
		$dateweekday = $weekday[date('w', $i)];
		$dateformatstring = ' '.$dateformatstring;
		$dateformatstring = preg_replace("/([^\\\])D/", "\\1".backslashit(substr($dateweekday, 0, 3)), $dateformatstring);
		$dateformatstring = preg_replace("/([^\\\])F/", "\\1".backslashit($datemonth), $dateformatstring);
		$dateformatstring = preg_replace("/([^\\\])l/", "\\1".backslashit($dateweekday), $dateformatstring);
		$dateformatstring = preg_replace("/([^\\\])M/", "\\1".backslashit(substr($datemonth, 0, 3)), $dateformatstring);
		$dateformatstring = substr($dateformatstring, 1, strlen($dateformatstring)-1);
	}
	$j = @date($dateformatstring, $i);
	if (!$j) {
	// for debug purposes
	//	echo $i." ".$mysqlstring;
	}
	return $j;
}

function current_time($type, $gmt = 0) {
	switch ($type) {
		case 'mysql':
			if ($gmt) $d = gmdate('Y-m-d H:i:s');
			else $d = gmdate('Y-m-d H:i:s', (time() + (get_settings('gmt_offset') * 3600)));
			return $d;
			break;
		case 'timestamp':
			if ($gmt) $d = time();
			else $d = time() + (get_settings('gmt_offset') * 3600);
			return $d;
			break;
	}
}

function date_i18n($dateformatstring, $unixtimestamp) {
	global $month, $weekday;
	$i = $unixtimestamp; 
	if ((!empty($month)) && (!empty($weekday))) {
		$datemonth = $month[date('m', $i)];
		$dateweekday = $weekday[date('w', $i)];
		$dateformatstring = ' '.$dateformatstring;
		$dateformatstring = preg_replace("/([^\\\])D/", "\\1".backslashit(substr($dateweekday, 0, 3)), $dateformatstring);
		$dateformatstring = preg_replace("/([^\\\])F/", "\\1".backslashit($datemonth), $dateformatstring);
		$dateformatstring = preg_replace("/([^\\\])l/", "\\1".backslashit($dateweekday), $dateformatstring);
		$dateformatstring = preg_replace("/([^\\\])M/", "\\1".backslashit(substr($datemonth, 0, 3)), $dateformatstring);
		$dateformatstring = substr($dateformatstring, 1, strlen($dateformatstring)-1);
	}
	$j = @date($dateformatstring, $i);
	return $j;
	}

function get_weekstartend($mysqlstring, $start_of_week) {
	$my = substr($mysqlstring,0,4);
	$mm = substr($mysqlstring,8,2);
	$md = substr($mysqlstring,5,2);
	$day = mktime(0,0,0, $md, $mm, $my);
	$weekday = date('w',$day);
	$i = 86400;
	while ($weekday > get_settings('start_of_week')) {
		$weekday = date('w',$day);
		$day = $day - 86400;
		$i = 0;
	}
	$week['start'] = $day + 86400 - $i;
	$week['end']   = $day + 691199;
	return $week;
}

function get_lastpostdate($timezone = 'server') {
	global $tableposts, $cache_lastpostdate, $pagenow, $wpdb;
	$add_seconds_blog = get_settings('gmt_offset') * 3600;
	$add_seconds_server = date('Z');
	$now = current_time('mysql', 1);
	if ( !isset($cache_lastpostdate[$timezone]) ) {
		switch(strtolower($timezone)) {
			case 'gmt':
				$lastpostdate = $wpdb->get_var("SELECT post_date_gmt FROM $tableposts WHERE post_date_gmt <= '$now' AND post_status = 'publish' ORDER BY post_date_gmt DESC LIMIT 1");
				break;
			case 'blog':
				$lastpostdate = $wpdb->get_var("SELECT post_date FROM $tableposts WHERE post_date_gmt <= '$now' AND post_status = 'publish' ORDER BY post_date_gmt DESC LIMIT 1");
				break;
			case 'server':
				$lastpostdate = $wpdb->get_var("SELECT DATE_ADD(post_date_gmt, INTERVAL '$add_seconds_server' SECOND) FROM $tableposts WHERE post_date_gmt <= '$now' AND post_status = 'publish' ORDER BY post_date_gmt DESC LIMIT 1");
				break;
		}
		$cache_lastpostdate[$timezone] = $lastpostdate;
	} else {
		$lastpostdate = $cache_lastpostdate[$timezone];
	}
	return $lastpostdate;
}

function get_lastpostmodified($timezone = 'server') {
	global $tableposts, $cache_lastpostmodified, $pagenow, $wpdb;
	$add_seconds_blog = get_settings('gmt_offset') * 3600;
	$add_seconds_server = date('Z');
	$now = current_time('mysql', 1);
	if ( !isset($cache_lastpostmodified[$timezone]) ) {
		switch(strtolower($timezone)) {
			case 'gmt':
				$lastpostmodified = $wpdb->get_var("SELECT post_modified_gmt FROM $tableposts WHERE post_modified_gmt <= '$now' AND post_status = 'publish' ORDER BY post_modified_gmt DESC LIMIT 1");
				break;
			case 'blog':
				$lastpostmodified = $wpdb->get_var("SELECT post_modified FROM $tableposts WHERE post_modified_gmt <= '$now' AND post_status = 'publish' ORDER BY post_modified_gmt DESC LIMIT 1");
				break;
			case 'server':
				$lastpostmodified = $wpdb->get_var("SELECT DATE_ADD(post_modified_gmt, INTERVAL '$add_seconds_server' SECOND) FROM $tableposts WHERE post_modified_gmt <= '$now' AND post_status = 'publish' ORDER BY post_modified_gmt DESC LIMIT 1");
				break;
		}
		$lastpostdate = get_lastpostdate($timezone);
		if ($lastpostdate > $lastpostmodified) {
			$lastpostmodified = $lastpostdate;
		}
		$cache_lastpostmodified[$timezone] = $lastpostmodified;
	} else {
		$lastpostmodified = $cache_lastpostmodified[$timezone];
	}
	return $lastpostmodified;
}

function user_pass_ok($user_login,$user_pass) {
	global $cache_userdata;
	if ( empty($cache_userdata[$user_login]) ) {
		$userdata = get_userdatabylogin($user_login);
	} else {
		$userdata = $cache_userdata[$user_login];
	}
	return (md5($user_pass) == $userdata->user_pass);
}

function get_currentuserinfo() { // a bit like get_userdata(), on steroids
	global $user_login, $userdata, $user_level, $user_ID, $user_nickname, $user_email, $user_url, $user_pass_md5, $cookiehash;
	// *** retrieving user's data from cookies and db - no spoofing

	if (isset($_COOKIE['wordpressuser_' . $cookiehash])) 
		$user_login = $_COOKIE['wordpressuser_' . $cookiehash];
	$userdata = get_userdatabylogin($user_login);
	$user_level = $userdata->user_level;
	$user_ID = $userdata->ID;
	$user_nickname = $userdata->user_nickname;
	$user_email = $userdata->user_email;
	$user_url = $userdata->user_url;
	$user_pass_md5 = md5($userdata->user_pass);
}

function get_userdata($userid) {
	global $wpdb, $cache_userdata, $tableusers;
	if ( empty($cache_userdata[$userid]) ) {
		$user = $wpdb->get_row("SELECT * FROM $tableusers WHERE ID = '$userid'");
		$user->user_nickname = stripslashes($user->user_nickname);
		$user->user_firstname = stripslashes($user->user_firstname);
		$user->user_lastname = stripslashes($user->user_lastname);
		$user->user_description = stripslashes($user->user_description);
		$cache_userdata[$userid] = $user;
	} else {
		$user = $cache_userdata[$userid];
	}
	return $user;
}

function get_userdatabylogin($user_login) {
	global $tableusers, $cache_userdata, $wpdb;
	if ( empty($cache_userdata["$user_login"]) ) {
		$user = $wpdb->get_row("SELECT * FROM $tableusers WHERE user_login = '$user_login'");
		$cache_userdata["$user_login"] = $user;
	} else {
		$user = $cache_userdata["$user_login"];
	}
	return $user;
}

function get_userid($user_login) {
	global $tableusers, $cache_userdata, $wpdb;
	if ( empty($cache_userdata["$user_login"]) ) {
		$user_id = $wpdb->get_var("SELECT ID FROM $tableusers WHERE user_login = '$user_login'");

		$cache_userdata["$user_login"] = $user_id;
	} else {
		$user_id = $cache_userdata["$user_login"];
	}
	return $user_id;
}

function get_usernumposts($userid) {
	global $tableposts, $tablecomments, $wpdb;
	return $wpdb->get_var("SELECT COUNT(*) FROM $tableposts WHERE post_author = '$userid'");
}

// examine a url (supposedly from this blog) and try to
// determine the post ID it represents.
function url_to_postid($url = '') {
	global $wpdb, $tableposts;

	$siteurl = get_settings('home');
	// Take a link like 'http://example.com/blog/something'
	// and extract just the '/something':
	$uri = preg_replace("#$siteurl#i", '', $url);

	// on failure, preg_replace just returns the subject string
	// so if $uri and $siteurl are the same, they didn't match:
	if ($uri == $siteurl) 
		return 0;
		
	// First, check to see if there is a 'p=N' to match against:
	preg_match('#[?&]p=(\d+)#', $uri, $values);
	$p = intval($values[1]);
	if ($p) return $p;
	
	// Match $uri against our permalink structure
	$permalink_structure = get_settings('permalink_structure');
	
	// Matt's tokenizer code
	$rewritecode = array(
		'%year%',
		'%monthnum%',
		'%day%',
		'%hour%',
		'%minute%',
		'%second%',
		'%postname%',
		'%post_id%'
	);
	$rewritereplace = array(
		'([0-9]{4})?',
		'([0-9]{1,2})?',
		'([0-9]{1,2})?',
		'([0-9]{1,2})?',
		'([0-9]{1,2})?',
		'([0-9]{1,2})?',
		'([_0-9a-z-]+)?',
		'([0-9]+)?'
	);

	// Turn the structure into a regular expression
	$matchre = str_replace('/', '/?', $permalink_structure);
	$matchre = str_replace($rewritecode, $rewritereplace, $matchre);

	// Extract the key values from the uri:
	preg_match("#$matchre#",$uri,$values);

	// Extract the token names from the structure:
	preg_match_all("#%(.+?)%#", $permalink_structure, $tokens);

	for($i = 0; $i < count($tokens[1]); $i++) {
		$name = $tokens[1][$i];
		$value = $values[$i+1];

		// Create a variable named $year, $monthnum, $day, $postname, or $post_id:
		$$name = $value;
	}
	
	// If using %post_id%, we're done:
	if (intval($post_id)) return intval($post_id);

	// Otherwise, build a WHERE clause, making the values safe along the way:
	if ($year) $where .= " AND YEAR(post_date) = '" . intval($year) . "'";
	if ($monthnum) $where .= " AND MONTH(post_date) = '" . intval($monthnum) . "'";
	if ($day) $where .= " AND DAYOFMONTH(post_date) = '" . intval($day) . "'";
	if ($hour) $where .= " AND HOUR(post_date) = '" . intval($hour) . "'";
	if ($minute) $where .= " AND MINUTE(post_date) = '" . intval($minute) . "'";
	if ($second) $where .= " AND SECOND(post_date) = '" . intval($second) . "'";
	if ($postname) $where .= " AND post_name = '" . $wpdb->escape($postname) . "' ";

	// Run the query to get the post ID:
	$id = intval($wpdb->get_var("SELECT ID FROM $tableposts WHERE 1 = 1 " . $where));

	return $id;
}


/* Options functions */

function get_settings($setting) {
	global $wpdb, $cache_settings;
	if (strstr($_SERVER['REQUEST_URI'], 'install.php')) {
		return false;
	}

	if ( (empty($cache_settings)) ) {
		$settings = get_alloptions();
		$cache_settings = $settings;
	} else {
		$settings = $cache_settings;
	}

	if ('home' == $setting && '' == $settings->home) return $settings->siteurl;

	if (!isset($settings->$setting)) {
		return false;
	} else {
		return stripslashes($settings->$setting);
	}
}

function get_alloptions() {
	global $tableoptions, $wpdb;
	$options = $wpdb->get_results("SELECT option_name, option_value FROM $tableoptions");
	if ($options) {
		foreach ($options as $option) {
			// "When trying to design a foolproof system, 
			//  never underestimate the ingenuity of the fools :)"
			if ('siteurl' == $option->option_name) $option->option_value = preg_replace('|/+$|', '', $option->option_value);
			if ('home' == $option->option_name) $option->option_value = preg_replace('|/+$|', '', $option->option_value);
			if ('category_base' == $option->option_name) $option->option_value = preg_replace('|/+$|', '', $option->option_value);

			$all_options->{$option->option_name} = $option->option_value;
		}
	}
	return $all_options;
}

function update_option($option_name, $newvalue) {
	global $wpdb, $tableoptions, $cache_settings;