Remember-me login always resets UI locale to default (English) after browser restart

Support
3

Hi,

VaadinSession already contain a correct locale but the problem is that framework doesn’t know how to get locale in case of RememberMeAuthenticationToken because its details object is not an instance of ClientDetails.

To fix the problem, implement AuthenticationLocaleResolver that supports RememberMeAuthenticationToken:

import com.vaadin.flow.server.VaadinSession;
import io.jmix.core.JmixOrder;
import io.jmix.core.security.AuthenticationLocaleResolver;
import org.jspecify.annotations.Nullable;
import org.springframework.security.authentication.RememberMeAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.stereotype.Component;

import java.util.Locale;

@Component("demo_RememberMeAuthenticationLocaleResolver")
public class RememberMeAuthenticationLocaleResolver implements AuthenticationLocaleResolver {

    @Override
    public boolean supports(Authentication authentication) {
        return authentication instanceof RememberMeAuthenticationToken;
    }

    @Nullable
    @Override
    public Locale getLocale(Authentication authentication) {
        if (VaadinSession.getCurrent() != null) {
            return VaadinSession.getCurrent().getLocale();
        }

        return null;
    }

    @Override
    public int getOrder() {
        return JmixOrder.HIGHEST_PRECEDENCE;
    }
}

I’ve created a GItHub issue to provide built-in AuthenticationLocaleResolver for RememberMeAuthenticationToken.

Regards,
Gleb