// JavaScript Document
/*!* JS Redirection Mobile** Developed by* Sebastiano Armeli-Battana (@sebarmeli) - http://www.sebastianoarmelibattana.com* Dual licensed under the MIT or GPL Version 3 licenses.*//*	
Copyright (c) 2011 Sebastiano Armeli-Battana (http://www.sebastianoarmelibattana.com)	This program is free software: you can redistribute it and/or modify	it under the terms of the GNU General Public License as published by	the Free Software Foundation, either version 3 of the License, or	(at your option) any later version.	This program is distributed in the hope that it will be useful,	but WITHOUT ANY WARRANTY; without even the implied warranty of	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the	GNU General Public License for more details.	You should have received a copy of the GNU General Public License	along with this program.  If not, see <http://www.gnu.org/licenses/>.*//** This script will cover a basic scenario of full JS mobile redirection.* The user will be redirected to the mobile version of the site (home page)* if it's trying to access the site from a mobile device. This check is* mainly done checking the User-Agent string. * The mobile URL will be obtained appending a prefix (default is "m") to * the hostname of the current URL. It's used a naked domain to avoid conflict with* www.* * In some cases the user needs to be redirected to the Desktop version of the site * from a mobile device. This happens when the user clicks on a link such as "Go to full site"* or when there is a specific parameter in the querystring.** In that case a new key/value in sessionStorage (for modern browsers) * will be set and until the user doesn't close browser window or tab it will access* to the desktop version from a mobile device. There is a fallback for old browsers that* don't support sessionStorage, and it will use a cookie. The cookie will expiry in one hour * (default value) or you configure the expiry time.* * To use this function, you need to call it as SA.redirection_mobile(config);* E.g. SA.redirection_mobile ({noredirection_param : "noredirection", mobile_prefix : "mobile", cookie_hours : "2" })* or* E.g. SA.redirection_mobile ({mobile_url : "mobile.whatever.com/example", mobile_sheme : "https" })* or* E.g. SA.redirection_mobile ({mobile_prefix : "mobile"})* or* E.g. SA.redirection_mobile ({mobile_prefix : "mobile", mobile_scheme : "https", redirection_paramName : "modile_redirect"})* or* E.g. SA.redirection_mobile ({mobile_url : "mobile.whatever.com/example", tablet_redirection : "true"})* or* E.g. SA.redirection_mobile ({{mobile_url : "mobile.whatever.com/example", beforeredirection_callback : (function(){alert('2')}) }})* or* E.g. SA.redirection_mobile ({{mobile_url : "mobile.whatever.com", tablet_url : "tablet.whatever.com")*** @link http://github.com/sebarmeli/JS-Redirection-Mobile-Site/* @author Sebastiano Armeli-Battana* @version 0.9.5* @date 25/07/2011 * *//*globals window,document, navigator, SA */
if (!window.SA) {window.SA = {};}
/** @param configuration object containing three properties:*			- mobile_prefix : prefix appended to the hostname (such as "m" to redirect to "m.domain.com")*			- mobile_url : mobile url to use for the redirection (such as "mobile.whatever.com" to redirect to "whatever.com" )*			- mobile_scheme : url scheme (http/https) of the mobile site domain*			- cookie_hours : number of hours the cookie needs to exist after redirection to desktop site*			- noredirection_param : parameter to pass in the querystring of the URL to avoid the redirection (the value must be equal to "true").*				It's also the name of the item in the localStorage (or cookie name) to avoid mobile*				redirection. Default value is "noredirection". Eg: http://domain.com?noredirection=true*			- tablet_redirection : boolean value that enables/disables(default) the redirection for tablet such as iPad, Samsung Galaxy Tab, Kindle or Motorola Xoom. - Default:false*				Default Url for redirection will be the same as the one for mobile devices.*			- tablet_url : url to use for the redirection in case user is using a tablet to access the site*			- keep_path : boolean to determine if the destination url needs to keep the path from the original url*			- keep_query : boolean to determine if the destination url needs to keep the querystring from the original url*			- beforeredirection_callback : callback launched before the redirection happens*/
SA.redirection_mobile = function(configuration) {	
// Helper function for adding time to the current date	
var addTimeToDate = function(msec) {		
// Get the current date		
var exdate = new Date();		
// Add time to the date		
exdate.setTime(exdate.getTime() + msec);		
//Return the new Date		
return exdate;	};	
// Helper function for getting a value from a parameter in the querystring	
var getQueryValue = function(param) {		if (!param) {			return;		}		var querystring = document.location.search,			queryStringArray = querystring && querystring.substring(1).split("&"),			i = 0,			length = queryStringArray.length;		for (; i < length; i++) {			var token = queryStringArray[i],				firstPart = token && token.substring(0, token.indexOf("="));			if (firstPart === param ) {				return token.substring(token.indexOf("=") + 1, token.length);			}		}	};	
// Retrieve the User Agent of the browser	
var agent = navigator.userAgent.toLowerCase(),		
// Constants		
FALSE = "false",		
TRUE = "true",		
// configuration object		
config = configuration || {},		
// parameter to pass in the URL to avoid the redirection	
redirection_param = config.noredirection_param || "noredirection",		// prefix appended to the hostname		
mobile_prefix = config.mobile_prefix || "m",		
// new url for the mobile site domain 		
mobile_url = config.mobile_url,		
// protocol for the mobile site domain 		
mobile_protocol = config.mobile_scheme ?			config.mobile_scheme + ":" :				document.location.protocol,		
// URL host of incoming request		
host = document.location.host,		
// value for the parameter passed in the URL to avoid the redirection
queryValue = getQueryValue(redirection_param),		
// Compose the mobile hostname considering "mobile_url" or "mobile_prefix" + hostname		
mobile_host = mobile_url ||			(mobile_prefix + "." + 				(!!host.match(/^www\./i) ?					host.substring(4) : 						host)),		
// Expiry hours for cookie		
cookie_hours = config.cookie_hours || 1,		
// Parameters to determine if the pathname and the querystring need to be kept		
keep_path = config.keep_path || false,		keep_query = config.keep_query || false,		
// new url for the tablet site domain 		
tablet_host = config.tablet_url || mobile_host,		
// Check if the UA is a mobile one (iphone, ipod, android, blackberry)
isUAMobile =!!(agent.match(/(iPhone|iPod|blackberry|android 0.5|htc|lg|midp|mmp|mobile|nokia|opera mini|palm|pocket|psp|sgh|smartphone|symbian|treo mini|Playstation Portable|SonyEricsson|Samsung|MobileExplorer|PalmSource|Benq|Windows Phone|Windows Mobile|IEMobile|Windows CE|Nintendo Wii)/i));	
// Check if the referrer was a mobile page (probably the user clicked "Go to full site") or in the 	
// querystring there is a parameter to avoid the redirection such as "?mobile_redirect=false"	
// (in that case we need to set a variable in the sessionStorage or in the cookie)	
if (document.referrer.indexOf(mobile_host) >= 0 || queryValue === TRUE ) {		if (window.sessionStorage) {			window.sessionStorage.setItem(redirection_param, TRUE);		} else {			document.cookie = redirection_param + "=" + TRUE + ";expires="+				addTimeToDate(3600*1000*cookie_hours).toUTCString();		}	}	
// Check if the sessionStorage contain the parameter	
var isSessionStorage = (window.sessionStorage) ? 			(window.sessionStorage.getItem(redirection_param) === TRUE) :				false,		
// Check if the Cookie has been set up		
isCookieSet = document.cookie ? 			(document.cookie.indexOf(redirection_param) >= 0) :				false;	
// Check if the device is a Tablet such as iPad, Samsung Tab, Motorola Xoom or Amazon Kindle	
if (!!(agent.match(/(iPad|SCH-I800|xoom|kindle)/i))) {		
// Check if the redirection needs to happen for iPad		
var isUATablet = (config.tablet_redirection === TRUE || !!config.tablet_url) ? true : false;		isUAMobile = false;	}	
// Check that User Agent is mobile, cookie is not set or value in the sessionStorage not present	
if ((isUATablet || isUAMobile) && !(isCookieSet || isSessionStorage)) {		// Callback call		
if (config.beforeredirection_callback) {			if (!config.beforeredirection_callback.call(this)) {				return;			}		}		var path_query = "";		if(keep_path) { 			path_query += document.location.pathname;		}		if (keep_query) {			path_query += document.location.search;		}		if (isUATablet){			document.location.href = mobile_protocol + "//" + tablet_host + path_query;		} else if (isUAMobile) {			document.location.href = mobile_protocol + "//" + mobile_host + path_query;		}	} };