/**Servlet to demonstrate how to use cookies to implement sessions
* Internet Programming 2 - Course
* @author Martin Carlsson
*/
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import mixer.*;

public class CookieSession extends HttpServlet {

    private static String filePath = "/ip-2/cookie-session";
    private static String htmlFile = null;
    private String htmlFileName ="cookie-session.htm";


    public void init()throws ServletException {
        if(htmlFile == null) {
        htmlFile = Mixer.getContent(new File(getServletContext().getRealPath(filePath+"\\"+htmlFileName)));
        }
    }

    
    public void doGet(HttpServletRequest req, HttpServletResponse res) throws IOException, ServletException {
    
        Mixer m = new Mixer(htmlFile);
        res.setContentType("text/html");
        PrintWriter out = res.getWriter();
        String timeCookie = null,nameCookie = null;
        Cookie[] cookies = req.getCookies();
        if(cookies != null) {
            for(int i = 0; i < cookies.length; i++) {
                if(cookies[i].getName().equals("timeCookie"))  {
                    timeCookie = cookies[i].getValue();
                    m.add("<!--===xxx===-->","_m_","A cookie with the name \"timeCookie\" and the value \"" + timeCookie +
                    "\" has been sent back to the server side application from your browser.");
                }
                if(cookies[i].getName().equals("nameCookie")) {
                    nameCookie = cookies[i].getValue();
                    m.add("<!--===xxx===-->","_m_","A cookie with the name \"nameCookie\" and the value \"" + nameCookie +
                    "\" has been sent back to the server side application from your browser.");
                }
            }
        }
        
        if(timeCookie == null) {
            timeCookie = new Date().toString();
            Cookie c = new Cookie("timeCookie", timeCookie);
            c.setMaxAge(60*60*3);
            res.addCookie(c);
            m.add("<!--===xxx===-->","_m_","A cookie with the name \"timeCookie\" and the value \"" + timeCookie +
            "\" has been sent from the server application.");
        }
        
        if(nameCookie == null) {
            nameCookie = "Hasse";
            Cookie c2 = new Cookie("nameCookie",nameCookie);
            c2.setMaxAge(60*60*3); 
            res.addCookie(c2);
            m.add("<!--===xxx===-->","_m_","A cookie with the name \"nameCookie\" and the value \"" + nameCookie +
            "\" has been sent from the server side application.");
        }
        m.add("<!--===xxx===-->","_m_","To view these cookies in Internet Explorer\n, go to: " + 
        "Tools - Internet Options - Settings - View Files.");
        m.add("<!--===xxx===-->","_m_","Press refresh button to send the cookies back to the server side application.");
        out.println(m.getMix());
    }
} // End class CookieSessions