<?php
/**
 * @package   gantry
 * @subpackage core
 * @version   3.2.20 June 19, 2012
 * @author    RocketTheme http://www.rockettheme.com
 * @copyright Copyright (C) 2007 - 2012 RocketTheme, LLC
 * @license   http://www.gnu.org/licenses/gpl-2.0.html GNU/GPLv2 only
 *
 * Gantry uses the Joomla Framework (http://www.joomla.org), a GNU/GPLv2 content management system
 *
 */
defined('GANTRY_VERSION') or die();

/**
 * @package   gantry
 * @subpackage core
 */
class GantryBrowser {
	var $_ua;

	var $name;
	var $version;
	var $shortversion;
	var $platform;
    var $engine;
    var $_checks = array();

	function GantryBrowser() {
		$this->_ua = $_SERVER['HTTP_USER_AGENT'];
		$this->_checkPlatform();
		$this->_checkBrowser();
        $this->_checkEngine();

		
		// add short version
		if ($this->version != 'unknown') $this->shortversion = substr($this->version, 0, strpos($this->version, '.'));
		else $this->shortversion = 'unknown';

        $this->_createChecks();
	}

	function _checkPlatform() {
		if (preg_match("/iPhone/", $this->_ua) || preg_match("/iPod/", $this->_ua)) {
			$this->platform = "iphone";
		}
		elseif (preg_match("/iPad/", $this->_ua)) {
			$this->platform = "ipad";
		}
		elseif (preg_match("/Android/", $this->_ua)) {
			$this->platform = "android";
		}
		elseif (preg_match("/Mobile/i", $this->_ua)) {
			$this->platform = "mobile";
		}
		elseif (preg_match("/win/i", $this->_ua)) {
			$this->platform = "win";
		}
		elseif (preg_match("/mac/i", $this->_ua)) {
			$this->platform = "mac";
		}
		elseif (preg_match("/linux/i", $this->_ua)) {
			$this->platform = "linux";
		} else {
			$this->platform = "unknown";
		}

		return $this->platform;
	}

    function _checkEngine(){
        switch($this->name){
            case 'ie':
                $this->engine = 'trident';
                break;
			case 'minefield':
            case 'firefox':
                $this->engine = 'gecko';
                break;
            case 'android':
            case 'ipad':
            case 'iphone':
            case 'chrome':
            case 'safari':
                $this->engine = 'webkit';
                break;
            case 'opera':
                $this->engine = 'presto';
                break;
            default:
                $this->engine = 'unknown';
                break;
        }
    }
	function _checkBrowser() {
		// IE
		if (preg_match('/msie/i', $this->_ua) && !preg_match('/opera/i', $this->_ua)) {
			$result = explode(' ', stristr(str_replace(';', ' ', $this->_ua), 'msie'));
			$this->name = 'ie';
			$this->version = $result[1];
		}
		// Firefox
		elseif (preg_match('/Firefox/', $this->_ua)) {
			$result = explode('/', stristr($this->_ua, 'Firefox'));
			$version = explode(' ', $result[1]);
			$this->name = 'firefox';
			$this->version = $version[0];
		}
		// Minefield
		elseif (preg_match('/Minefield/', $this->_ua)) {
			$result = explode('/', stristr($this->_ua, 'Minefield'));
			$version = explode(' ', $result[1]);
			$this->name = 'minefield';
			$this->version = $version[0];
		}
		// Chrome
		elseif (preg_match('/Chrome/', $this->_ua)) {
			$result = explode('/', stristr($this->_ua, 'Chrome'));
			$version = explode(' ', $result[1]);
			$this->name = 'chrome';
			$this->version = $version[0];
		}
		//Safari
		elseif (preg_match('/Safari/', $this->_ua) && !preg_match('/iPhone/', $this->_ua) && !preg_match('/iPod/', $this->_ua) && !preg_match('/iPad/', $this->_ua)) {
			$result = explode('/', stristr($this->_ua, 'Version'));
			$this->name = 'safari';
			if (isset ($result[1])) {
				$version = explode(' ', $result[1]);
				$this->version = $version[0];
			} else {
				$this->version = 'unknown';
			}
		}
		// Opera
		elseif (preg_match('/opera/i', $this->_ua)) {
			$result = stristr($this->_ua, 'opera');

			if (preg_match('/\//', $result)) {
				$result = explode('/', $result);
				$version = explode(' ', $result[1]);
				$this->name = 'opera';
				$this->version = $version[0];
			} else {
				$version = explode(' ', stristr($result, 'opera'));
				$this->name = 'opera';
				$this->version = $version[1];
			}
		}
		// iPhone/iPod
		elseif (preg_match('/iPhone/', $this->_ua) || preg_match('/iPod/', $this->_ua)) {
			$result = explode('/', stristr($this->_ua, 'Version'));
			$this->name = 'iphone';
			if (isset ($result[1])) {
				$version = explode(' ', $result[1]);
				$this->version = $version[0];
			} else {
				$this->version = 'unknown';
			}
		}
		// iPad
		elseif (preg_match('/iPad/', $this->_ua)) {
			$result = explode('/', stristr($this->_ua, 'Version'));
			$this->name = 'ipad';
			if (isset ($result[1])) {
				$version = explode(' ', $result[1]);
				$this->version = $version[0];
			} else {
				$this->version = 'unknown';
			}
		}
		// Android
		elseif (preg_match('/Android/', $this->_ua)) {
			$result = explode('/', stristr($this->_ua, 'Version'));
			$this->name = 'android';
			if (isset ($result[1])) {
				$version = explode(' ', $result[1]);
				$this->version = $version[0];
			} else {
				$this->version = "unknown";
			}
		} else {
			$this->name = "unknown";
			$this->version = "unknown";
		}
	}

    function _createChecks() {
        $this->_checks = array(
            '', // filename
            '-' . $this->name,                                               // browser check
            '-' . $this->platform,                                           // platform check
            '-' . $this->engine,                                             // render engine
            '-' . $this->name . '-' . $this->platform,                       // browser + platform check
            '-' . $this->name . $this->shortversion,                         // short browser version check
            '-' . $this->name . $this->version,                              // longbrowser version check
            '-' . $this->name . $this->shortversion . '-' . $this->platform, // short browser version + platform check
            '-' . $this->name . $this->version . '-' . $this->platform       // longbrowser version + platform check
        );
    }
    
    function getChecks($file, $keep_path = false) {
        $checkfiles = array();
        $ext = substr($file, strrpos($file, '.'));
        $path = ($keep_path)?dirname($file).DS:'';
        $filename = basename($file, $ext);
        foreach($this->_checks as $suffix){
            $checkfiles[] = $path.$filename.$suffix.$ext;
        }
        return $checkfiles;
    }
}