ChangeNumberPopupPageController.java

package net.sourceforge.solexatools.webapp.controller;

import java.util.LinkedList;
import java.util.List;

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

import net.sourceforge.seqware.common.model.Registration;
import net.sourceforge.seqware.common.util.Log;
import net.sourceforge.solexatools.Security;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.BaseCommandController;

/**
 * <p>
 * ChangeNumberPopupPageController class.
 * </p>
 * 
 * @author boconnor
 * @version $Id: $Id
 */
public class ChangeNumberPopupPageController extends BaseCommandController {

    /** Constant <code>SEPARATOR="java.io.File.separator"</code> */
    public static final String SEPARATOR = java.io.File.separator;

    /**
     * <p>
     * Constructor for ChangeNumberPopupPageController.
     * </p>
     */
    public ChangeNumberPopupPageController() {
        super();
        setSupportedMethods(new String[] { METHOD_GET });
    }

    private void setNumberCurrentPage(HttpServletRequest request, Integer numberCurrentPage) {
        request.getSession(false).setAttribute("numberCurrentPage", numberCurrentPage);
    }

    private Integer getNumberCurrentPage(HttpServletRequest request) {
        Integer numberCurrentPage = (Integer) request.getSession(false).getAttribute("numberCurrentPage");
        if (numberCurrentPage == null) {
            numberCurrentPage = 0;
        }
        return numberCurrentPage;
    }

    private String incrementNumberCurrentPage(HttpServletRequest request) {
        Log.info("Call increment ..");
        Integer numberCurrentPage = getNumberCurrentPage(request);
        List<String> listSavedPage = getListSavedPage(request);
        Log.info("Start. Number page = " + numberCurrentPage + "; List page size = " + listSavedPage.size());
        if (numberCurrentPage < listSavedPage.size()) {
            Log.info("Do ++ ");
            numberCurrentPage++;
            setNumberCurrentPage(request, numberCurrentPage);
        }
        Log.info("Start. Number page = " + numberCurrentPage + "; List page size = " + listSavedPage.size());
        return getCurrentPage(request);
    }

    private String decreaseNumberCurrentPage(HttpServletRequest request) {
        Integer numberCurrentPage = getNumberCurrentPage(request);
        Log.info("Call decrease ..");
        Log.info("Start. Number curr page = " + numberCurrentPage);
        if (numberCurrentPage > 1) {
            Log.info("Do -- ");
            numberCurrentPage--;
            setNumberCurrentPage(request, numberCurrentPage);
        }
        Log.info("End. Number curr page = " + numberCurrentPage);
        return getCurrentPage(request);
    }

    private void setListSavedPage(HttpServletRequest request, List<String> listSavedPage) {
        request.getSession(false).setAttribute("listSavedPage", listSavedPage);
    }

    private List<String> getListSavedPage(HttpServletRequest request) {
        List<String> listSavedPage = (List<String>) request.getSession(false).getAttribute("listSavedPage");
        if (listSavedPage == null) {
            listSavedPage = new LinkedList<>();
        }
        return listSavedPage;
    }

    private String getCurrentPage(HttpServletRequest request) {
        Integer numberCurrentPage = getNumberCurrentPage(request);
        List<String> listSavedPage = getListSavedPage(request);
        return listSavedPage.get(numberCurrentPage - 1);
    }

    private String getStartPage(HttpServletRequest request) {
        setNumberCurrentPage(request, 1);
        return getCurrentPage(request);
    }

    private String getCurrentPage(HttpServletRequest request, String action) {
        String currentPage = "";
        if ("next".equals(action)) {
            currentPage = incrementNumberCurrentPage(request);
        }
        if ("previous".equals(action)) {
            currentPage = decreaseNumberCurrentPage(request);
        }
        if ("reload".equals(action)) {
            currentPage = getCurrentPage(request);
        }
        if ("home".equals(action)) {
            currentPage = getStartPage(request);
        }
        return currentPage;
    }

    /**
     * {@inheritDoc}
     * 
     * @return
     * @throws java.lang.Exception
     */
    @Override
    protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception {

        // Registration registration = Security.requireRegistration(request, response);
        Registration registration = Security.getRegistration(request);
        if (registration == null) return new ModelAndView("redirect:/login.htm");

        /**
         * Pass registration so that we can filter the list if its appropriate to do so.
         */
        String action = getRequestedAction(request);
        getCurrentPage(request, action);

        ModelAndView modelAndView = null;// new ModelAndView("ResultUnpack");

        request.getSession(false).setAttribute("isUserAbortedViewIndexPage", false);

        return modelAndView;
    }

    private String getRequestedAction(HttpServletRequest request) {
        return request.getParameter("action");
    }
}