<?

# try and prevent caching
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
header('Cache-Control: no-store, no-cache, must-revalidate');
header('Cache-Control: post-check=0, pre-check=0', FALSE);
header('Pragma: no-cache');

# continue our session
# session_start();
// THIS CRAPPY PHP DOESN'T SUPPORT THIS?!?!?!?!

# set script timout... or attempt to!
set_time_limit(4);
#ini_set("max_input_time", 4);
#ini_set("max_execution_time", 4);


function showlive()
{
	$back = "";
	$path = "http://hurricane.legend.net.uk/~neilw/campics/temp/cam.jpg";
#	$path = $DOCUMENT_ROOT . "./images/offline.jpg";
	$path = "./campics/temp/cam.jpg";
	
	$filemtime = filemtime($path);
	$ctime = time() - 300;
//	print "$filemtime < $ctime ?"; exit();

	if (($filemtime < $ctime) and ($filemtime > 0))
	{
		# no pic available!  show the offline.
		$sec = date("s");
		if ($sec < 15) $p = "evacard.jpg";
		elseif ($sec < 30) $p = "millycard.jpg";
		elseif ($sec < 45) $p = "tillycard.jpg";
		else $p = "pennycard.jpg";
		
		$path = $DOCUMENT_ROOT . "./images/offline/$p";
	}

	$fp = @fopen($path, "r"); // Can't read $filename.jpg");
	if (!$fp)
	{
		for ($i=1; $i<=10; $i++)
		{
			$fp = @fopen($DOCUMENT_ROOT . "./campics/temp/camb.jpg", "r");
			if (!$fp)
			{
				for ($n=0; $n<=500; $n++)
				{
					$dummy = mt_rand(0,999);
				}
			}
			else break;
		}
		$back = 1;
	}
	$content = @fread($fp, 102400);

	if (substr($content, -2) == chr(hexdec("FF")).chr(hexdec("D9")))
	{
		header ("Content-Type: image/jpeg");
		print $content;
		flush();
	}
	else $back=1;
	
	@fclose($fp);
	# write our backup pic!
	
#	if (($back == "") and (date("s") == 30))
	if ($back == "")
	{
		$fp = @fopen($DOCUMENT_ROOT . "./campics/temp/camb.jpg", "w");
		if (flock($fp, 2))
		{
			fwrite($fp, $content);
			flock($fp, 3);
			fclose($fp);
		}
		fclose($fp);
	}
}

# live cam:
showlive();
exit();

# master variables for our script

# how many pics?
$numpics = 53576;
$numpics = 20999;

# how many secs in a day?
$daysecs = 86400;
# 60 * 60 * 24

# function which outputs any given picture
function showpic($folder="0", $filename="00000001")
{
	$path = $DOCUMENT_ROOT . "./cam/$folder/$filename.jpg";
	$path = $DOCUMENT_ROOT . "./cam/latest/$folder/$filename.jpg";

	$fp = fopen($path, "r") or die(""); // Can't read $filename.jpg");
	$content = fread($fp, 102400);

	if (substr($content, -2) == chr(hexdec("FF")).chr(hexdec("D9")))
	{
		header ("Content-Type: image/jpeg");
		print $content;
		flush();
	}
	fclose($fp);
}


# work out where we are today!
$d = date("d");
$m = date("m");
$y = date("Y");

# find the start of the day
$start = mktime(00, 00, 00, $m, $d, $y);
$now   = time();

# what second are we on right now?
$cursec= $now - $start;

# what pic does this second relate to?
$cursec = round((($now - $start) / $daysecs) * $numpics);

# some checking for out of range results...  (never hurts does it ;)
if ($cursec < 1) $cursec = 1;
if ($cursec > $numpics) $cursec = $numpics;

# format the pic filename correctly.
$folder = intval ($cursec / 1000);
$cursec = sprintf("%08s", $cursec);

# that's it

showpic($folder, $cursec);
exit();

?>