package org.argeo.cms;
   
   import java.util.ArrayList;
   import java.util.List;
   import java.util.Locale;
   import java.util.ResourceBundle;
   
   import org.argeo.cms.auth.CurrentUser;
   
  /** Utilities simplifying the development of localization enums. */
  public class LocaleUtils {
  	public static Object local(Enum<?> en) {
  		return local(en, getCurrentLocale(), "/OSGI-INF/l10n/bundle");
  	}
  
  	public static Object local(Enum<?> en, Locale locale) {
  		return local(en, locale, "/OSGI-INF/l10n/bundle");
  	}
  
  	public static Object local(Enum<?> en, Locale locale, String resource) {
  		return local(en, locale, resource, en.getClass().getClassLoader());
  	}
  
  	public static Object local(Enum<?> en, Locale locale, String resource, ClassLoader classLoader) {
  		ResourceBundle rb = ResourceBundle.getBundle(resource, locale, classLoader);
  		return rb.getString(en.name());
  	}
  
  	public static String lead(String raw, Locale locale) {
  		return raw.substring(0, 1).toUpperCase(locale) + raw.substring(1);
  	}
  
  	public static String lead(Localized localized) {
  		return lead(localized, getCurrentLocale());
  	}
  
  	public static String lead(Localized localized, Locale locale) {
  		return lead(localized.local(locale).toString(), locale);
  	}
  
  	static Locale getCurrentLocale() {
  		return CurrentUser.locale();
  		// return UiContext.getLocale();
  		// FIXME look into Subject or settings
  		// return Locale.getDefault();
  	}
  
  	/** Returns null if argument is null. */
  	public static List<Locale> asLocaleList(Object locales) {
  		if (locales == null)
  			return null;
  		ArrayList<Locale> availableLocales = new ArrayList<Locale>();
  		String[] codes = locales.toString().split(",");
  		for (int i = 0; i < codes.length; i++) {
  			String code = codes[i];
  			// variant not supported
  			int indexUnd = code.indexOf("_");
  			Locale locale;
  			if (indexUnd > 0) {
  				String language = code.substring(0, indexUnd);
  				String country = code.substring(indexUnd + 1);
  				locale = new Locale(language, country);
  			} else {
  				locale = new Locale(code);
  			}
  			availableLocales.add(locale);
  		}
  		return availableLocales;
  	}
  }