<?php

/*
  Code for displaying "NEW!" markers on entries and/or comments in Movable Type.
  v1.0, 2003-03-18
  Phil Gyford, phil@gyford.com, http://www.gyford.com/
  
  Feel free to use the code according to this Creative Commons License:
  http://creativecommons.org/licenses/by-nc-sa/1.0
  
   
  INSTRUCTIONS
  ============
  
  Put your domain name in the $domain variable.
  Change the values of $newtext and $oldtext to what you want displayed (if anything).
  
  Include this file as a .php file on each of your pages *before* any text or
  HTML is output. 
  
  In your Movable Type templates put this where you want the marker to appear:
  <?php newItemMarker("<$MTEntryDate format="%Y-%m-%d %H:%M:%S" encode_php="qq"$>"); ?>
  
  (Or use MTCommentDate if you're doing this within MTComments tags.)
  
  See http://www.gyford.com/phil/writing/2003/03/18/new_markers_in_m.php
  for further help.

*/


/////////////////////////////////
// EDIT THESE VARIABLES.

// Your site's domain name.
$domain = "www.yourdomain.com";

// The path to your weblog.
// You can leave this if there will only be one weblog at this domain.
$weblogpath = "/";

// The HTML you want displayed for new or old items.
$newtext = "NEW";
$oldtext = "old";


// The time a user's session will last in seconds. 5400 = 90 minutes.
$sessiontime = 5400;

// How long until cookies expire in seconds. 2592000 = 30 days.
$cookieexpire = 2592000;

//
/////////////////////////////////


// GET THE USER'S COOKIES.

// The last time the user viewed a page on the site.
$lastview 		= isset($HTTP_COOKIE_VARS["lastview"]) ? $HTTP_COOKIE_VARS["lastview"] : "";

// The time the user's current session started.
$sessionstart 	= isset($HTTP_COOKIE_VARS["sessionstart"]) ? $HTTP_COOKIE_VARS["sessionstart"] : "";

// The time of the user's last page view in the previous session.
$prevsession 	= isset($HTTP_COOKIE_VARS["prevsession"]) ? $HTTP_COOKIE_VARS["prevsession"] : "";


// SET COOKIES.

$timenow = time();

if ($lastview == "" || $sessionstart == "") {
	// The user has NOT been to the site before...

	$sessionstart = $timenow;
	
	setcookie("sessionstart", $sessionstart, time()+$cookieexpire, $weblogpath, $domain);

} elseif (($timenow - $sessionstart) > $sessiontime) {
	// This is a new session for the user...
	
	$prevsession = $lastview;
	setcookie("prevsession", $prevsession, time()+$cookieexpire, $weblogpath, $domain);
	
	$sessionstart = $timenow;
	setcookie("sessionstart", $sessionstart, time()+$cookieexpire, $weblogpath, $domain);
}

$lastview = $timenow;
setcookie("lastview", $lastview, time()+$cookieexpire, $weblogpath, $domain);


// Call this function to output either an old or new marker.
// $itemtime is of the form "YYYY-MM-DD hh:mm:ss".
// We could just pass it unixtime but we can't generate time in
// this format from the Movable Type templates.

function newItemMarker ($itemtime) {
	global $prevsession, $newtext, $oldtext;
	
	// Translate $itemtime into unixtime format.
	$itemtime = strtotime($itemtime);

	if ($prevsession == "") {
		// The user's first time here.
		$new = true;
			
	} elseif ($itemtime > $prevsession) {
		// This item appeared since the user's previous session.
		$new = true;
	
	} else {
		// It's old.
		$new = false;
	}
	
	if ($new) {
		print $newtext;
	} else {
		print $oldtext;
	}
}


?>