set language cookie when language is changed, try to use language cookie in .htaccess

.htaccess

 RewriteEngine on
 RewriteBase /
+RewriteCond %{REQUEST_URI} ^/[^aef].*$ [NC]
+# Don't rewrite if English has been chosen
+RewriteCond %{HTTP_COOKIE} ^openedx-language-preference=en$  [NC]
+RewriteRule ^(.*)$ $1 [L]
+
+RewriteCond %{REQUEST_URI} ^/[^aef].*$ [NC]
+# Rewrite to language from cookie
+RewriteCond %{HTTP_COOKIE} ^openedx-language-preference=(ar|es|fa|fr)$  [NC]
+RewriteRule ^(.*)$ /%1/$1 [L]
+
 # Simple way to exclude /ar, /es, /fa and /fr for now
 RewriteCond %{REQUEST_URI} ^/[^aef].*$ [NC]
-# Don't rewrite if language has been chosen already
-RewriteCond %{HTTP_COOKIE} !^openedx-language-preference.*$  [NC]
 # Rewrite non-English supported languages
 RewriteCond %{HTTP:Accept-Language} ^.*(ar|es|fa|fr).*$ [NC]
 RewriteRule ^(.*)$ /%1/$1 [L]

source/javascripts/index.js

@@ -55,7 +55,7 @@
     });
 
     // Add target="_blank" to external links so they open in new tabs
-    var siteUrlPattern = "^https?:\/\/(www\.)?(workstation...\.lan:4567|localhost:4567|totem-project\.org)";
+    var siteUrlPattern = "^https?:\/\/(www\.)?(www-staging.)?(workstation...\.lan:4567|localhost:4567|totem-project\.org)";
     var siteUrlMatch = RegExp(siteUrlPattern, "i");
     var excludeMatch = /(^mailto:|^tel:|^#|^javascript:)/;
     $("a").each(function() {
@@ -65,7 +65,17 @@
       }
     });
   });
-
+  document.setLangCookie = function(lang) {
+     console.log("Setting lang to " + lang);
+     var expiryDate = new Date();
+     expiryDate = expiryDate.setMonth(expiryDate.getMonth() + 12);
+     var domain = window.location.hostname;
+     cookieParams = "domain=." + domain + ";path=/;";
+     if (window.location.protocol == "https") {
+        cookieParams += "secure=true;"
+     }
+     document.cookie = "openedx-language-preference=" + lang + ";expires=" + expiryDate + "; + ";secure=true;path=/";
+  };
 
 })(jQuery, window, document);
 

source/partials/_nav.html.erb

@@ -35,7 +35,7 @@ end
                 <ul class="dropdown-menu" aria-labelledby="dropdownMenuButton">
                   <% I18n.available_locales.select{|l| l != ::I18n.locale}.each do |loc| %>
                     <li class="dropdown-item">
-                      <%= link_to(config[:locales][loc][:name], "/index.html", :locale => loc, :class => "nav-link") %>
+                      <%= link_to(config[:locales][loc][:name], "/index.html", :locale => loc, :class => "nav-link", :onclick => "setLangCookie('#{loc}')") %>
                     </li>
                   <% end %>
                 </ul>