Gazelle/image.php

<?
/*-- Image Start Class ---------------------------------*/
/*------------------------------------------------------*/
/* Simplified version of script_start, used for the     */
/* sitewide image proxy.                                */
/*------------------------------------------------------*/
/********************************************************/
error_reporting(E_COMPILE_ERROR|E_RECOVERABLE_ERROR|E_ERROR|E_CORE_ERROR);

if (isset($_SERVER['http_if_modified_since'])) {
	header("Status: 304 Not Modified");
	die();
}

header('Expires: '.date('D, d-M-Y H:i:s \U\T\C', time() + 3600 * 24 * 120)); // 120 days
header('Last-Modified: '.date('D, d-M-Y H:i:s \U\T\C', time()));

require('classes/config.php'); // The config contains all site wide configuration information as well as memcached rules

if (!extension_loaded('gd')) {
	error('nogd');
}

require(SERVER_ROOT.'/classes/cache.class.php'); // Require the caching class
require(SERVER_ROOT.'/classes/encrypt.class.php'); // Require the encryption class
require(SERVER_ROOT.'/classes/regex.php');

$Cache = NEW CACHE($MemcachedServers); // Load the caching class
$Enc = NEW CRYPT; // Load the encryption class

if (isset($_COOKIE['session'])) {
	$LoginCookie = $Enc->decrypt($_COOKIE['session']);
}
if (isset($LoginCookie)) {
	list($SessionID, $UserID) = explode('|~|', $Enc->decrypt($LoginCookie));
	$UserID = (int)$UserID;
	$UserInfo = $Cache->get_value("user_info_$UserID");
	$Permissions = $Cache->get_value('perm_'.$UserInfo['PermissionID']);
}

function check_perms($PermissionName) {
	global $Permissions;
	return (isset($Permissions['Permissions'][$PermissionName])) ? true : false;
}

function error($Type) {
	header('Content-type: image/gif');
	die(file_get_contents(SERVER_ROOT.'/sections/image/'.$Type.'.gif'));
}

function invisible($Image) {
	$Count = imagecolorstotal($Image);
	if ($Count == 0) {
		return false;
	}
	$TotalAlpha = 0;
	for ($i = 0; $i < $Count; ++$i) {
		$Color = imagecolorsforindex($Image, $i);
		$TotalAlpha += $Color['alpha'];
	}
	return (($TotalAlpha/$Count) == 127) ? true : false;

}

function is_number($Str) {
	$Return = true;
	if ($Str < 0) {
		$Return = false;
	}
	// We're converting input to a int, then string and comparing to original
	$Return = ($Str == strval(intval($Str)) ? true : false);
	return $Return;
}

function verysmall($Image) {
	return ((imagesx($Image) * imagesy($Image)) < 25) ? true : false;
}

function image_type($Data) {
	if (!strncmp($Data, 'GIF', 3)) {
		return 'gif';
	}
	if (!strncmp($Data, pack('H*', '89504E47'), 4)) {
		return 'png';
	}
	if (!strncmp($Data, pack('H*', 'FFD8'), 2)) {
		return 'jpeg';
	}
	if (!strncmp($Data, 'BM', 2)) {
		return 'bmp';
	}
	if (!strncmp($Data, 'II', 2) || !strncmp($Data, 'MM', 2)) {
		return 'tiff';
	}
}

function image_height($Type, $Data) {
	$Length = strlen($Data);
	global $URL, $_GET;
	switch ($Type) {
		case 'jpeg':
			// See http://www.obrador.com/essentialjpeg/headerinfo.htm
			$i = 4;
			$Data = (substr($Data, $i));
			$Block = unpack('nLength', $Data);
			$Data = substr($Data, $Block['Length']);
			$i += $Block['Length'];
			$Str []= "Started 4, + ".$Block['Length'];
			while ($Data != '') { // iterate through the blocks until we find the start of frame marker (FFC0)
				$Block = unpack('CBlock/CType/nLength', $Data); // Get info about the block
				if ($Block['Block'] != '255') { // We should be at the start of a new block
					break;
				}
				if ($Block['Type'] != '192') { // C0
					$Data = substr($Data, $Block['Length'] + 2); // Next block
					$Str []= "Started $i, + ".($Block['Length'] + 2);
					$i += ($Block['Length'] + 2);
				} else { // We're at the FFC0 block
					$Data = substr($Data, 5); // Skip FF C0 Length(2) precision(1)
					$i += 5;
					$Height = unpack('nHeight', $Data);
					return $Height['Height'];
				}
			}
			break;
		case 'gif':
			$Data = substr($Data, 8);
			$Height = unpack('vHeight', $Data);
			return $Height['Height'];
		case 'png':
			$Data = substr($Data, 20);
			$Height = unpack('NHeight', $Data);
			return $Height['Height'];
		default:
			return 0;
	}
}


function send_pm($ToID, $FromID, $Subject, $Body, $ConvID = '') {
	global $DB, $Cache;
	if ($ToID == 0) {
		// Don't allow users to send messages to the system
		return;
	}
	if ($ConvID == '') {
		$DB->query("
			INSERT INTO pm_conversations (Subject)
			VALUES ('$Subject')");
		$ConvID = $DB->inserted_id();
		$DB->query("
			INSERT INTO pm_conversations_users
				(UserID, ConvID, InInbox, InSentbox, SentDate, ReceivedDate, UnRead)
			VALUES
				('$ToID', '$ConvID', '1', '0', '".sqltime()."', '".sqltime()."', '1')");
		if ($FromID != 0) {
			$DB->query("
				INSERT INTO pm_conversations_users
					(UserID, ConvID, InInbox, InSentbox, SentDate, ReceivedDate, UnRead)
				VALUES
					('$FromID', '$ConvID', '0', '1', '".sqltime()."', '".sqltime()."', '0')");
		}
	} else {
		$DB->query("
			UPDATE pm_conversations_users
			SET
				InInbox = '1',
				UnRead = '1',
				ReceivedDate = '".sqltime()."'
			WHERE UserID = '$ToID'
				AND ConvID = '$ConvID'");

		$DB->query("
			UPDATE pm_conversations_users
			SET
				InSentbox = '1',
				SentDate = '".sqltime()."'
			WHERE UserID = '$FromID'
				AND ConvID = '$ConvID'");
	}
	$DB->query("
		INSERT INTO pm_messages
			(SenderID, ConvID, SentDate, Body)
		VALUES
			('$FromID', '$ConvID', '".sqltime()."', '$Body')");

	// Clear the caches of the inbox and sentbox
	/*$DB->query("
		SELECT UnRead
		FROM pm_conversations_users
		WHERE ConvID = '$ConvID'
			AND UserID = '$ToID'");
	*/
	$DB->query("
		SELECT COUNT(ConvID)
		FROM pm_conversations_users
		WHERE UnRead = '1'
			AND UserID = '$ToID'
			AND InInbox = '1'");
	list($UnRead) = $DB->next_record(MYSQLI_BOTH, FALSE);
	$Cache->cache_value("inbox_new_$ToID", $UnRead);

	//if ($UnRead == 0) {
	//	$Cache->increment("inbox_new_$ToID");
	//}
	return $ConvID;
}

function send_irc($Raw) {
	$IRCSocket = fsockopen(SOCKET_LISTEN_ADDRESS, SOCKET_LISTEN_PORT);
	fwrite($IRCSocket, $Raw);
	fclose($IRCSocket);
}

function display_str($Str) {
	if ($Str === NULL || $Str === false || is_array($Str)) {
		return '';
	}
	if ($Str != '' && !is_number($Str)) {
		$Str = make_utf8($Str);
		$Str = mb_convert_encoding($Str, 'HTML-ENTITIES', 'UTF-8');
		$Str = preg_replace("/&(?![A-Za-z]{0,4}\w{2,3};|#[0-9]{2,5};)/m", '&amp;', $Str);

		$Replace = array(
			"'",'"',"<",">",
			'&#128;','&#130;','&#131;','&#132;','&#133;','&#134;','&#135;','&#136;',
			'&#137;','&#138;','&#139;','&#140;','&#142;','&#145;','&#146;','&#147;',
			'&#148;','&#149;','&#150;','&#151;','&#152;','&#153;','&#154;','&#155;',
			'&#156;','&#158;','&#159;'
		);

		$With = array(
			'&#39;','&quot;','&lt;','&gt;',
			'&#8364;','&#8218;','&#402;','&#8222;','&#8230;','&#8224;','&#8225;','&#710;',
			'&#8240;','&#352;','&#8249;','&#338;','&#381;','&#8216;','&#8217;','&#8220;',
			'&#8221;','&#8226;','&#8211;','&#8212;','&#732;','&#8482;','&#353;','&#8250;',
			'&#339;','&#382;','&#376;'
		);

		$Str = str_replace($Replace, $With, $Str);
	}
	return $Str;
}

function make_utf8($Str) {
	if ($Str != '') {
		if (is_utf8($Str)) {
			$Encoding = 'UTF-8';
		}
		if (empty($Encoding)) {
			$Encoding = mb_detect_encoding($Str, 'UTF-8, ISO-8859-1');
		}
		if (empty($Encoding)) {
			$Encoding = 'ISO-8859-1';
		}
		if ($Encoding == 'UTF-8') {
			return $Str;
		} else {
			return @mb_convert_encoding($Str, 'UTF-8', $Encoding);
		}
	}
}

function is_utf8($Str) {
	return preg_match('%^(?:
		[\x09\x0A\x0D\x20-\x7E]			 // ASCII
		| [\xC2-\xDF][\x80-\xBF]			// non-overlong 2-byte
		| \xE0[\xA0-\xBF][\x80-\xBF]		// excluding overlongs
		| [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} // straight 3-byte
		| \xED[\x80-\x9F][\x80-\xBF]		// excluding surrogates
		| \xF0[\x90-\xBF][\x80-\xBF]{2}	 // planes 1-3
		| [\xF1-\xF3][\x80-\xBF]{3}		 // planes 4-15
		| \xF4[\x80-\x8F][\x80-\xBF]{2}	 // plane 16
		)*$%xs', $Str
	);
}

require(SERVER_ROOT.'/sections/image/index.php');
?>