public static Func <IServiceProvider, LocalizablePresenter> BasedOnQuery(string name, bool redirectWhenNotFound = true)
{
void redirect(IDotvvmRequestContext context)
{
var url = new UriBuilder(context.HttpContext.Request.Url);
url.Query =
context.HttpContext.Request.Query
.Where(q => q.Key != name)
.Concat(new[] { new KeyValuePair <string, string>(name, context.Configuration.DefaultCulture) })
.Select(q => Uri.EscapeUriString(q.Key) + "=" + Uri.EscapeUriString(q.Value)).Apply(s => string.Join("&", s));
if (url.ToString() == context.HttpContext.Request.Url.ToString())
{
throw new Exception($"The specified default culture is probably invalid");
}
context.RedirectToUrl(url.ToString());
}
CultureInfo?getCulture(IDotvvmRequestContext context) =>
context.Query.TryGetValue(name, out var value) && !string.IsNullOrEmpty(value) ? CultureInfo.GetCultureInfo(value) : null;
var presenter = new LocalizablePresenter(
redirectWhenNotFound ? WithRedirectOnFailure(redirect, getCulture) : getCulture,
context => context.Services.GetRequiredService <IDotvvmPresenter>().ProcessRequest(context)
);
return(_ => presenter);
}
public static Func <IServiceProvider, LocalizablePresenter> BasedOnParameter(string name, bool redirectWhenNotFound = true)
{
void redirect(IDotvvmRequestContext context)
{
var routeParameters = context.Parameters.ToDictionary(e => e.Key, e => e.Value);
if (context.Configuration.DefaultCulture.Equals(routeParameters[name]))
{
throw new Exception($"The specified default culture is probably invalid");
}
routeParameters[name] = context.Configuration.DefaultCulture;
context.RedirectToRoute(context.Route !.RouteName, routeParameters, query: context.HttpContext.Request.Query);
}
CultureInfo?getCulture(IDotvvmRequestContext context) =>
context.Parameters !.TryGetValue(name, out var value) && !string.IsNullOrEmpty(value as string) ? CultureInfo.GetCultureInfo((string)value !) : null;
var presenter = new LocalizablePresenter(
redirectWhenNotFound ? WithRedirectOnFailure(redirect, getCulture) : getCulture,
context => context.Services.GetRequiredService <IDotvvmPresenter>().ProcessRequest(context)
);
return(_ => presenter);
}