add javascript translations, darken background and other confirm

app/assets/javascripts/user/application.js

@@ -26,6 +26,7 @@
 // require twitter/bootstrap/bootstrap-carousel
 //= require twitter/bootstrap/bootstrap-typeahead
 //= require twitter/bootstrap/bootstrap-affix
+//= require qwaiter
 //= require_directory .
 //= require_self
 var path_mapping = {
@@ -34,6 +35,12 @@ var path_mapping = {
   list_products_for_table: '/user/list_products_for_table',
   list_products: '/user/list_products'
 }
+var translations = {
+  confirmations: {
+    move_to_another_table_title: 'Move to another table?',
+    move_to_another_table: 'Are you sure you want to move to another table?'
+  }
+}
 function redirect_to(mapping, variables){
   variables || (variables = {});
   var vars = []
@@ -43,8 +50,19 @@ function redirect_to(mapping, variables){
   window.location = path_mapping[mapping] + '?' + vars.join('&')
 }
 function currency(num) {
-  if (isNaN(num) || num === '' || num === null) {
-    num = 0.0;
-  }
-  return '€ ' + parseFloat(num).toFixed(2);
+  return Qwaiter.currency(num);
+}
+String.prototype.capitalize = function() {
+    return this.charAt(0).toUpperCase() + this.slice(1);
+}
+function t(path){
+  var parts = path.split('.')
+  var accessor = 'translations["' + parts.join('"]["')+ '"]';
+  var result;
+  try{ 
+    result = eval(accessor);
+  } catch(err){ 
+    result = parts[parts.length - 1].capitalize();
+  }
+  return result;
 }

app/assets/javascripts/user/quser.js.coffee

@@ -185,10 +185,10 @@ window.Quser=
     $.get('/user/table_info.json?table_id='+table.table_id, (res)->
       if res.current_table_id
         if res.other_supplier
-          #TODO cannot do something with other supplier when list is active
+          redirect_to 'user_root', {message: 'table_is_from_other_supplier'}
         else if res.current_table_id == table.table_id
           #nothing has changed, show product list
-          window.location = '/user/list_products'
+          redirect_to 'list_products'
         else if res.current_table_id != table.table_id
           if res.occupied
             redirect_to 'user_root', {message: 'table_is_occupied'}
@@ -200,11 +200,18 @@ window.Quser=
             redirect_to 'user_root', {message: 'supplier_is_closed'}
           else
             #TODO Offer to move table
-            $.post('/user/move_table', {table_id: table.table_id}, (res2)->
-              if res2.occupied
-                alert('Cannot move to occupied table')
-              else
-                window.location = '/user/list_products'
+            Qwaiter.confirm(
+              ok: ->
+                $.post('/user/move_table', {table_id: table.table_id}, (res2)->
+                  if res2.occupied
+                    alert('Cannot move to occupied table')
+                  else
+                    redirect_to 'list_products', {message: 'moved_to_another_table'}
+                )
+              cancel: ->
+                redirect_to 'list_products'
+              title: t('confirmations.move_to_another_table_title')
+              content: t('confirmations.move_to_another_table')
             )
       else
         if res.occupied