package net.sourceforge.fenixedu.presentationTier.servlets.ajax;

import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sourceforge.fenixedu.domain.RootDomainObject;
import net.sourceforge.fenixedu.domain.notifications.SystemNotifier;
import pt.ist.fenixWebFramework.servlets.json.JsonObject;

public class SystemNotifierServlet extends HttpServlet {

	public static String NOTIFIER_ACTIVE = "active";
	public static String NOTIFIER_MESSAGE = "message";

	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		process(req, resp);
	}

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		process(req, resp);
	}

	private void process(HttpServletRequest req, HttpServletResponse resp)
			throws IOException {
		SystemNotifier notifier = RootDomainObject.getInstance()
				.getSystemNotifier();

		JsonObject jsonObject = new JsonObject();
		if (notifier.isActive()) {
			jsonObject.addAttribute(NOTIFIER_ACTIVE, "1");
			jsonObject.addAttribute(NOTIFIER_MESSAGE, notifier.getMessage());

		} else {
			jsonObject.addAttribute(NOTIFIER_ACTIVE, "0");
		}

		byte[] jsonReply = jsonObject.getJsonString().getBytes("UTF-8");

		final OutputStream outputStream = resp.getOutputStream();

		resp.setContentType("text");
		resp.setContentLength(jsonReply.length);
		outputStream.write(jsonReply);
		outputStream.flush();
		outputStream.close();

	}
}