Lift - Locale via user action (clicking flag img)

_resources_xxxx.html

<?xml version="1.0"?>
<resources> <!-- A small example showing one way to do internationalization in Lift (_resources_index.html)-->
 :
<res name="about.link.text" lang="en"default="true">About</res>
<res name="about.link.text" lang="sv">Om</res> 
 :
</resources>

aTemplate.html

<!--In template--> 
<!--One way to get localized string from resource file -->
... <span data-lift="Loc?locid=about.link.text">About</span>

<!-- Let the user switch lang by clicking flags -->
<li ><a class="flag-se" href="?hl=sv_SE"></a> </li>
<li><a class="flag-gb" href="?hl=en_GB"></a></li>
  

Boot.scala

package bootstrap.liftweb
import java.util.Locale
   :

//object holding the chosen locale during the session, can be updated by user at any time. 
object localeOverride extends SessionVar[Box[Locale]](Empty)

class Boot extends Loggable {
  def boot {
    :
    // Build SiteMap using Menu.i to get localized menu names from resource files
    val entries = List(
      Menu.i("Home") / "index",
    :
    :
    //Localization block
    val swedishLocale = new Locale("sv", "SE")

    object localeMemo extends RequestMemoize[Int, Locale] {
      override protected def __nameSalt = randomString(20)
    }

    LiftRules.localeCalculator = (request: Box[HTTPRequest]) =>
      localeMemo(request.hashCode, (for {
        r <- request
        p <- tryo(r.param("hl").head.split(Array('_', '-')))
      } yield p match {
        case Array(lang) => {
          if (!lang.equals("hl")) {
            logger.debug("setting local to "+lang)
            localeOverride.set(Full(new Locale(lang)))
          }
          localeOverride.open_!
        }
        case Array(lang, country) => {
          logger.debug("setting local to "+lang+"_"+country)
          localeOverride.set(Full(new Locale(lang, country)))
          localeOverride.open_!
        }
      }).openOr(localeOverride.openOr(swedishLocale)))
      //end loxalization block