Switching language version.

Fix #76

1 files changed, 35 insertions, 2 deletions

diff --git a/hesla.js b/hesla.js
index f769ce7..7c64c89 100644
--- a/hesla.js
+++ b/hesla.js
@@ -1,7 +1,6 @@
 if (!Date.prototype.toISODateString) {
 
   (function() {
-
     function pad(number) {
       var r = String(number);
       if ( r.length === 1 ) {
@@ -17,9 +16,43 @@ if (!Date.prototype.toISODateString) {
     };
 
   }());
+}
+
+const today_id = new Date().toISODateString();
+
+// Switch langauge
+function lang_reload() {
+  var new_basename = "index.html";
+  var new_url = "NOURL";
+  if (localStorage.language && (localStorage.language === "de")) {
+      new_basename = "index_de.html";
+  }
+
+  var old_basename = window.location.pathname.split("/").slice(-1);
 
+  if ((old_basename !== new_basename) || (window.location.pathname.length === 0)) {
+    new_url = window.location.href.replace(/(index[a-zA-Z-_]*\.html)?$/,
+	new_basename);
+  }
+
+  if (window.location.href !== new_url) {
+    window.location.assign(new_url);
+  }
 }
 
-var today_id = new Date().toISODateString();
+document.getElementById("czech_nav").addEventListener("click",
+    function(evt) {
+      localStorage.language = "cs";
+      lang_reload();
+    }, false);
+
+document.getElementById("german_nav").addEventListener("click",
+    function(evt) {
+      localStorage.language = "de";
+      lang_reload();
+    }, false);
+
+lang_reload();
+
 var today_losungen = document.getElementById(today_id);
 today_losungen.style.display = "block";