package org.kuali.common.util;
   
   import org.apache.commons.lang3.StringUtils;
   import org.kuali.common.util.obscure.DefaultObscurer;
   import org.kuali.common.util.obscure.Obscurer;
   import org.kuali.common.util.property.Constants;
   import org.slf4j.Logger;
   
   public class LoggerUtils {
  
  	private static final Obscurer DEFAULT_OBSCURER = new DefaultObscurer();
  
  	public static final String getUsername(String username) {
  		return getNullAsNone(username);
  	}
  
  	public static final String getNullAsNone(String string) {
  		if (string == null) {
  			return Constants.NONE;
  		} else {
  			return string;
  		}
  	}
  
  	public static final String getPassword(String username, String password) {
  		return getPassword(username, password, DEFAULT_OBSCURER);
  	}
  
  	public static final String getPassword(String username, String password, Obscurer obscurer) {
  		if (password == null) {
  			// There is no password, return NONE
  			return Constants.NONE;
  		} else if (StringUtils.equals(username, password)) {
  			// Not exactly high security, display the clear text value
  			return password;
  		} else {
  			// Otherwise obscure it
  			return obscurer.obscure(password);
  		}
  	}
  
  	public static final void logUsername(Logger logger, String prefix, String username) {
  		logger.info("{} - {}", prefix, getUsername(username));
  	}
  
  	public static final void logPassword(Logger logger, String prefix, String username, String password) {
  		logPassword(logger, prefix, username, password, DEFAULT_OBSCURER);
  	}
  
  	public static final void logPassword(Logger logger, String prefix, String username, String password, Obscurer obscurer) {
  		logger.info("{} - {}", prefix, getPassword(username, password, obscurer));
  	}
  
  	/**
  	 * Log <code>null</code> as <code>NONE</code>
  	 */
  	public static final void logNullAsNone(Logger logger, String prefix) {
  		logger.info("{} - {}", prefix, Constants.NONE);
  	}
  
  }