public virtual ConcurrentDictionary <string, LanguageTag> GetAppLanguages()
{
ConcurrentDictionary <string, LanguageTag> AppLanguages = (ConcurrentDictionary <string, LanguageTag>)HttpRuntime.Cache["i18n.AppLanguages"];
if (AppLanguages != null)
{
return(AppLanguages);
}
lock (Sync)
{
AppLanguages = (ConcurrentDictionary <string, LanguageTag>)HttpRuntime.Cache["i18n.AppLanguages"];
if (AppLanguages != null)
{
return(AppLanguages);
}
AppLanguages = new ConcurrentDictionary <string, LanguageTag>();
// Insert into cache.
// NB: we do this before actually populating the collection. This is so that any changes to the
// folders before we finish populating the collection will cause the cache item to be invalidated
// and hence reloaded on next request, and so will not be missed.
HttpRuntime.Cache.Insert("i18n.AppLanguages", AppLanguages, _translationRepository.GetCacheDependencyForAllLanguages());
// Populate the collection.
List <string> languages = _translationRepository.GetAvailableLanguages().Select(x => x.LanguageShortTag).ToList();
// Ensure default language is included in AppLanguages where appropriate.
if (LocalizedApplication.Current.MessageKeyIsValueInDefaultLanguage &&
!languages.Any(x => LocalizedApplication.Current.DefaultLanguageTag.Equals(x)))
{
languages.Add(LocalizedApplication.Current.DefaultLanguageTag.ToString());
}
foreach (var langtag in languages)
{
if (IsLanguageValid(langtag))
{
AppLanguages[langtag] = LanguageTag.GetCachedInstance(langtag);
}
}
// Done.
return(AppLanguages);
}
}