<?php
/*=====================================================================*\
|| ################################################################### ||
|| # Iris Studios Shared Object Framework [#]version[#]
|| # --------------------------------------------------------------- # ||
|| # All parts of this file are Š2003-[#]year[#] Iris Studios, Inc. No     # || 
|| # part of this file may be reproduced in any way: part or whole.  # ||
|| # --------------------------------------------------------------- # ||
|| # Š2003 - [#]year[#] Iris Studios, Inc. | http://www.iris-studios.com   # ||
|| ################################################################### ||
\*=====================================================================*/

$OBJECT = 'Core Functions';
$CLASS = 'Functions';
$OBJ = 'funct';

/**
* Globalized function framework
*
* This framework is a set of functions that are commonly used in most
* applications.
*
* @author		Iris Studios, Inc.
* @copyright	Copyright Š2003 - [#]year[#], Iris Studios, Inc.
* @version		$Revision$
* 
*/
class Functions
{
	/**
	* Global environment variables
	*
	* @var	cookiepath	The path for cookies
	* @var	cookiedom	Cookie domain
	* @var	cookieexp	The time in which a cookie will expire
	* @var	bgcolour	Current background colour of the alternation system
	*/
	var $cookiepath = '/';
	var $cookiedom = '';
	var $cookieexp = 900;
	var $bgcolour = '';
	
	/**
	* Sets a cookie with a friendly interface
	*
	* @param	str		The name of the cookie
	* @param	str		Value of the cookie
	* @param	bool	Is the cookie going to stay for a while?
	*/
	function cookie($name, $value = '', $sticky = true)
	{
		// expire the cookie
		if (!$value)
		{
			setcookie($name, $value, time() - (2 * $this->cookieexp), $this->cookiepath, $this->cookiedom);
		}
		// set the cookie
		else
		{
			if ($sticky)
			{
				$expire = time() + 60 * 60 * 24 * 365;
			}
			else
			{
				$expire = time() + $this->cookieexp;
			}
			
			setcookie($name, $value, $expire, $this->cookiepath, $this->cookiedom);
		}
	}
		
	/**
	* Alternate between two background colours
	*
	* @param	str		First CSS class name
	* @param	str		Second CSS class name
	*/
	function exec_swap_bg($class1 = 'alt1', $class2 = 'alt2')
	{
		static $count;
		
		$this->bgcolour = iff($count % 2, $class1, $class2);
		$count++;
	}
	
	/**
	* Force-download a file by sending application/octetstream
	*
	* @param	str		The text of the file to be streamed
	* @param	str		File name of the new file
	*/
	function download_file($file, $name)
	{
		if ($this->is_browser('ie') OR $this->is_browser('opera') OR $this->is_browser('safari'))
		{
			$mime = 'application/octetstream';
		}
		else
		{
			$mime = 'application/octet-stream';
		}
		
		header("Content-Type: $mime");
		header('Expires: ' . gmdate('D, d M Y H:i:s') . ' GMT');
		header('Content-Disposition: attachment; filename="' . $name . '"');
		header('Content-length: ' . strlen($file));
		header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
		header('Pragma: public');
		
		print($file);
		exit;
	}
	
	/**
	* Verify that an email address is valid via regex
	*
	* @param	str		An email address
	*
	* @return	bool	Validity of the email address
	*/
	function is_valid_email($email)
	{
		if (preg_match('#^[a-z0-9\.\-\+_]+?@(.*?\.)*?[a-z0-9\-_]+?\.[a-z]{2,4}$#i', $email))
		{
			return true;
		}
		else
		{
			return false;
		}
	}
	
	/**
	* Check a browser's user agent against a pre-determined list
	*
	* @param	str		Browser name
	* @param	str		The browser's version
	*
	* @param	mixed	False if there is no match, the version if there is
	*/
	function is_browser($check, $version = '')
	{
		$useragent = strtolower($_SERVER['HTTP_USER_AGENT']);
		$browser = array();
		$matches = array();
		
		// -------------------------------------------------------------------
		// -- Opera
		// -------------------------------------------------------------------
		# Opera/6.05 (Windows 98; U) [en]
		# Mozilla/4.0 (compatible; MSIE 5.0; Windows 98) Opera 6.0 [en]
		# Mozilla/5.0 (Windows 98; U) Opera 6.0 [en]
		# Mozilla/4.0 (compatible; MSIE, 6.0; Windows 98) Opera 7.0 [en]
		if (preg_match('#opera ([0-9\.]+)#', $useragent, $matches) !== false)
		{
			if (isset($matches[1]))
			{
				$browser['opera'] = $matches[1];
			}
		}
		
		// -------------------------------------------------------------------
		// -- Mac browser
		// -------------------------------------------------------------------
		if (strpos($useragent, 'mac') !== false)
		{
			$browser['mac'] = true;
		}
		
		// -------------------------------------------------------------------
		// -- Internet explorer
		// -------------------------------------------------------------------
		# Mozilla/4.0 (compatible; MSIE 6.0b; Windows NT 5.1; .NET CLR 1.0.2914)
		# Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0)
		if (preg_match('#msie ([0-9\.]+)#', $useragent, $matches) !== false AND !isset($browser['opera']))
		{
			if (isset($matches[1]))
			{
				$browser['ie'] = $matches[1];
			}
		}
		
		// -------------------------------------------------------------------
		// -- Safari
		// -------------------------------------------------------------------
		# Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en) AppleWebKit/125.4 (KHTML, like Gecko) Safari/125.9
		if (preg_match('#safari/([0-9\.]+)#', $useragent, $matches) !== false)
		{
			if (isset($matches[1]))
			{
				$browser['safari'] = $matches[1];
			}
		}
		
		// -------------------------------------------------------------------
		// -- Konqueror
		// -------------------------------------------------------------------
		# Mozilla/5.0 (compatible; Konqueror/3)
		# Mozilla/5.0 (compatible; Konqueror/3.1; i686 Linux; 20020628)
		if (preg_match('#konqueror/([0-9\.]+)#', $useragent, $matches) !== false)
		{
			if (isset($matches[1]))
			{
				$browser['konqueror'] = $matches[1];
			}
		}
		
		// -------------------------------------------------------------------
		// -- Mozilla
		// -------------------------------------------------------------------
		# Mozilla/5.001 (windows; U; NT4.0; en-us) Gecko/25250101
		# Mozilla/5.001 (Macintosh; N; PPC; ja) Gecko/25250101 MegaCorpBrowser/1.0 (MegaCorp, Inc.)
		if (preg_match('#gecko/([0-9]+)#', $useragent, $matches) !== false AND !isset($browser['safari']))
		{
			if (isset($matches[1]))
			{
				$browser['mozilla'] = $matches[1];
			}
			
			// -------------------------------------------------------------------
			// -- Firefox
			// -------------------------------------------------------------------
			# Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7) Gecko/20040628 Firefox/0.9.1
			# Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4a) Gecko/20030423 Firebird Browser/0.6
			if (preg_match('#(firebird|firefox)( browser)?/([0-9\.]+)#', $useragent, $matches) !== false)
			{
				if (isset($matches[3]))
				{
					$browser['firefox'] = $matches[3];
				}
			}
			
			// -------------------------------------------------------------------
			// -- Netscape
			// -------------------------------------------------------------------
			# Mozilla/5.0 (Macintosh; U; PPC; en-US; rv:0.9.4.1) Gecko/20020318 Netscape6/6.2.2
			if (preg_match('#netscape([0-9].*?)?/([0-9\.]+)#', $useragent, $matches) !== false)
			{
				if (isset($matches[2]))
				{
					$browser['netscape'] = $matches[2];
				}
			}
			
			// -------------------------------------------------------------------
			// -- Camino
			// -------------------------------------------------------------------
			# Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7) Gecko/20040623 Camino/0.8
			if (preg_match('#camino/([0-9\.]+)#', $useragent, $matches) !== false)
			{
				if (isset($matches[1]))
				{
					$browser['camino'] = $matches[1];
				}
			}
		}
		
		if (isset($browser["$check"]))
		{
			if ($version)
			{
				if ($browser["$check"] >= $version)
				{
					return $browser["$check"];
				}
				else
				{
					return false;
				}
			}
			else
			{
				return $browser["$check"];
			}
		}
		else
		{
			return false;
		}
	}
}

/*=====================================================================*\
|| ###################################################################
|| # $HeadURL$
|| # $Id$
|| ###################################################################
\*=====================================================================*/
?>