<?

include("Settings.php");

$Type=$pathinfo[0];
$Size=$pathinfo[1];

$allowed_ratios=array(	"Miniature"	=>array("50x50",
											"100x100",
											"120x120"),
						"Aperçu"	=>array("500x500",
											"480x640", "640x480",
											"600x800", "800x600",
											"768x1024", "1024x768",
											"1024x1280", "1280x1024",
											"1200x1600", "1600x1200"),
						"Illustration"
									=>array("250x250")
					);

array_shift($pathinfo); // Type
array_shift($pathinfo); // Size
$picture=CONTENTS . "/".urldecode(implode("/", $pathinfo));


/*$AUTHENTICATED=FALSE;
$LIMITED_ACCESS=!authorized(picture, FALSE);
$AUTHENTICATED=$_SESSION[USERNAME]?TRUE:FALSE;

if ($LIMITED_ACCESS)
	$cache_control="private";
else
	$cache_control="public";*/

$cache_control="private";

// One year cache
require_once("Caching.php");
SendCacheHeaders(filemtime($picture), (3600 * 24 * 30 * 12), $cache_control);

require_once("Authenticate.php");

if (   isset($LIMITED_ACCESS)
	&&( //----------- CHECK REFERRER //
	    // http://www.hiegel.fr/~hugues/Aperçu/800x600/Photos/..."
		preg_replace( '%'. BASE_URL . "/(Aperçu|Miniature)/([[0-9]+x[0-9]+|Original)/Photos/" . '%', BASE_URL . "/Photos/",
			preg_replace( "%/[^/]*$%", "",
				urldecode("http" . ($_SERVER[HTTPS] == "on" ? "s" : "") . "://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']))
			)
			!= 
	    // http://www.hiegel.fr/~hugues/Photos/..."
			preg_replace( "%/[^/]*$%", "",
				urldecode($_SERVER['HTTP_REFERER'])
			)
      )
   )
{
	if (! http_authenticate($picture))
		exit;
}

switch($Type)
{
	case "Aperçu":
		if (in_array($Size, $allowed_ratios["Aperçu"]))
		{
			$Width= substr($Size, 0, strpos($Size, "x"));
			$Height=substr($Size, strpos($Size, "x") + 1);
		}
		else
		if (strcmp($Size, "Original"))
			die ("$pathinfo[0] : \"$Size\" is not an available size !!");

		$FileType="jpg";
		$Miniaturized=0;
		break;
	default:
	case "Miniature":
		if (in_array($Size, $allowed_ratios["Miniature"]))
		{
			$Width= substr($Size, 0, strpos($Size, "x"));
			$Height=substr($Size, strpos($Size, "x") + 1);
		}
		else
		{
			$Width=100;
			$Height=100;
		}
		$Miniaturized=1;
		$FileType="png";
		break;
}

$width=@$Width;
$height=@$Height;

//if (filesize($picture) > 3*1024*1024) exit;

$mimetype=mime_content_type($picture);
if (  !strcmp($mimetype, "image/gif")
	||!strcmp($mimetype, "image/mng"))
{
	$FileType="gif";
}

// The md5() is to obtain a relative long complex filename
// The fileinode() is to obtain *exactly* the picture we want to point to
// so we can give back a generated thumbnail even if it has been moved on
// another folder in the filesystem.
// The third test is made to force re-generation of thumbnails if this
// script has been modified. :-)
$size=GetImageSize($picture);

if (  !strcmp($Size, "Original")
	||(!strcmp("Aperçu", $pathinfo[0]) && ($size[0] < $width) && ($size[1] < $height))
   )
{
	$thumbnail=$picture;
}
else
{
	$thumbnail="/var/cache/www/Miniatures/".$width."x".$height."/".md5(fileinode($picture)).".$FileType";

	if (  !is_dir(dirname($thumbnail)))
		@mkdir(dirname($thumbnail));

	if (  !file_exists($thumbnail)
		|| filemtime($thumbnail) < filemtime($picture)
		|| filemtime($thumbnail) < filemtime($_SERVER['SCRIPT_FILENAME'])
		)
	{
		// Keep aspect ratio
		if ( (!$width && !$height)
		||(($size[0] < $width) && ($size[1] < $height)) )
		{
			$width = $size[0];
			$height = $size[1];
		}
		else
		{
			if ($size[0] / $size[1] > $width / $height)
				$height = floor($width * $size[1] / $size[0]);
			else
				$width =  floor($height * $size[0] / $size[1]);
		}

	//	system("mkdir -p `dirname $thumbnail`");

		// ImageMagick is most powerful and knows most image formats than PHP...
		$command =     "convert 2>&1 "
					. "\"$picture\""
		.($Miniaturized
			? " -geometry '".$Width."x".$Height."^'"
			 ." -gravity center"
			 ." -extent '".$Width."x".$Height."'"
			: " -geometry ".$width."x".$height
		 )
					." $thumbnail";
		system($command);
	}
}

if (file_exists($thumbnail))
{
	header("Content-Type: " . mime_content_type($thumbnail));// or die("");
	SendCacheHeaders(filemtime($picture), (3600 * 24 * 30 * 12), $cache_control);
	echo file_get_contents($thumbnail);
}
else
	die ("$pathinfo[0] : Error while reading $picture");
?>