initial commit

js/language.js

@@ -0,0 +1,98 @@
+// this file is here so it can correctly handel the language pagameter
+
+(function() {
+	if (typeof(window.MyApp) === 'undefined') {
+		window.MyApp = {};
+	}
+	if (typeof(window.MyApp.config) === 'undefined') {
+		window.MyApp.config = {};
+	}
+
+	var languageCookieName = 'current-language';
+	var validLanguages = ['de', 'it', 'en', 'rm'];
+
+	var getUrlParameter = function(name) {
+		name = name.replace(/[\[]/, '\\[').replace(/[\]]/, '\\]');
+		var regex = new RegExp('[\\?&]' + name + '=([^&#]*)');
+		var results = regex.exec(location.search);
+		return results === null ? '' : decodeURIComponent(results[1].replace(/\+/g, ' '));
+	};
+
+	var setCookie = function(name, value, days) {
+		var expires = '';
+		if (days) {
+			var date = new Date();
+			date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
+			expires = '; expires=' + date.toUTCString();
+		}
+		document.cookie = name + '=' + (value || '') + expires + '; path=/';
+	};
+
+	var getCookie = function(name) {
+		var nameEQ = name + '=';
+		var ca = document.cookie.split(';');
+		for (var i = 0;i < ca.length;i++) {
+			var c = ca[i];
+			while (c.charAt(0) == ' ') {c = c.substring(1, c.length);}
+			if (c.indexOf(nameEQ) == 0) {return c.substring(nameEQ.length, c.length);}
+		}
+		return null;
+	};
+
+	var delCookie = function(name) {
+		document.cookie = name + '=; Max-Age=-99999999;';
+	};
+
+	var removeURLParameter = function(url, parameter) {
+		//prefer to use l.search if you have a location/link object
+		var urlparts = url.split('?');
+		if (urlparts.length >= 2) {
+
+			var prefix = encodeURIComponent(parameter) + '=';
+			var pars = urlparts[1].split(/[&;]/g);
+
+			//reverse iteration as may be destructive
+			for (var i = pars.length; i-- > 0;) {
+				//idiom for string.startsWith
+				if (pars[i].lastIndexOf(prefix, 0) !== -1) {
+					pars.splice(i, 1);
+				}
+			}
+
+			return urlparts[0] + (pars.length > 0 ? '?' + pars.join('&') : '');
+		}
+		return url;
+	};
+
+
+	// try to get the language:
+	// first check if there is a lang query string parameter
+	var langQ = getUrlParameter('lang');
+	var selectedLang = validLanguages[0];
+	if (langQ && validLanguages.indexOf(langQ) >= 0) {
+		selectedLang = langQ;
+		setCookie(languageCookieName, langQ);
+
+		//reload the page without the lang parameter. we use the cookie now.
+		var newUrl = removeURLParameter(window.location.toString(), 'lang');
+		//removeURLParameter does not return the hash. add it back if there is one.
+		newUrl = newUrl + window.location.hash;
+		window.location = newUrl;
+		return;
+	}
+
+	var langC = getCookie(languageCookieName);
+	if (langC && validLanguages.indexOf(langC) >= 0) { //get the language from the cookie
+		selectedLang = langC;
+	} else { //get the language from the browser
+		var langN = window.navigator.userLanguage || window.navigator.language;
+
+		if (langN && validLanguages.indexOf(langN) >= 0) {
+			selectedLang = langN;
+		}
+	}
+
+	//export selected lang to app
+	MyApp.config.lang = selectedLang;
+
+})();