package net.sourceforge.fenixedu.presentationTier.mapping;

import java.util.Enumeration;

import javax.servlet.http.HttpServletRequest;

public class MappingUtils {

    public static String currentURL(HttpServletRequest request) {
	// customize to match parameters
	String queryString = constructQueryString(request);

	StringBuilder id = new StringBuilder(request.getRequestURL());

	if (queryString != null) {
	    id.append("?");

	    id.append(queryString);
	}
	return id.toString();
    }

    private static String constructQueryString(HttpServletRequest request) {
	StringBuilder queryString = new StringBuilder();

	String requestQueryString = request.getQueryString();
	if (requestQueryString != null) {
	    queryString.append(requestQueryString);
	}

	Enumeration parameterNames = request.getParameterNames();
	if (parameterNames != null) {
	    while (parameterNames.hasMoreElements()) {
		String parameterName = (String) parameterNames.nextElement();

		String[] parameterValues = request.getParameterValues(parameterName);
		for (int i = 0; i < parameterValues.length; i++) {
		    String parameterValue = parameterValues[i];

		    if (queryString.length() != 0) {
			queryString.append("&");
		    }

		    queryString.append("&");

		    queryString.append(parameterName);
		    queryString.append("=");
		    queryString.append(parameterValue);
		}
	    }
	}

	if (queryString.length() != 0) {
	    return queryString.toString();
	}
	return null;

    }

}