fi.hoski.web.forms.KeyInfoServlet.java Source code

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Here is the source code for fi.hoski.web.forms.KeyInfoServlet.java

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/*
 * Copyright (C) 2012 Helsingfors Segelklubb ry
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
package fi.hoski.web.forms;

import com.google.appengine.api.datastore.*;
import fi.hoski.datastore.*;
import fi.hoski.datastore.repository.KeyInfo;
import fi.hoski.datastore.repository.Keys;
import fi.hoski.web.ServletLog;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

/**
 *
 * @author Timo Vesalainen
 */
public class KeyInfoServlet extends HttpServlet {

    private DatastoreService datastore;
    private DSUtils entities;
    private Events events;
    private Races races;

    @Override
    public void init() throws ServletException {
        super.init();
        datastore = new CachingDatastoreService(DatastoreServiceFactory.getDatastoreService(), Keys.getRootKey());
        entities = new DSUtilsImpl(datastore);
        events = new EventsImpl();
        races = new RacesImpl(new ServletLog(this), datastore, entities, null);
    }

    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        try {
            response.setHeader("Cache-Control", "no-cache"); // input comes from referrer
            response.setContentType("application/json");
            boolean authenticated = request.isUserInRole("member");

            JSONObject json = new JSONObject();
            Key parent = getAncestor(request);
            if (parent != null) {
                KeyInfo keyInfo = new KeyInfo(entities, events, races, "", parent, authenticated);
                Map<String, Object> m = keyInfo.getMap();
                String clubDiscount = (String) m.get("RaceSeries.ClubDiscount");
                String club = (String) m.get("Club");
                if (Boolean.parseBoolean(clubDiscount) && "HSK".equalsIgnoreCase(club)) {
                    m.put("isClubDiscountGranted", true);
                } else {
                    m.put("isClubDiscountGranted", false);
                }
                for (Map.Entry<String, Object> e : m.entrySet()) {
                    if (e.getValue() instanceof List) {
                        JSONArray a = new JSONArray();
                        json.put(e.getKey(), a);
                        List<String> l = (List<String>) e.getValue();
                        for (String s : l) {
                            a.put(s);
                        }
                    } else {
                        if (e.getValue() instanceof char[]) {
                            JSONArray a = new JSONArray();
                            json.put(e.getKey(), a);
                            char[] ar = (char[]) e.getValue();
                            for (char c : ar) {
                                a.put((int) c);
                            }
                        } else {
                            json.put(e.getKey(), e.getValue());
                        }
                    }
                }
                json.write(response.getWriter());
            }
        } catch (EntityNotFoundException ex) {
            log(ex.getMessage(), ex);
            response.setStatus(HttpServletResponse.SC_NOT_FOUND);
        } catch (JSONException ex) {
            log(ex.getMessage(), ex);
            throw new ServletException(ex);
        }
    }

    private Key getAncestor(HttpServletRequest request) throws EntityNotFoundException {
        String attachment = request.getParameter("attachment");
        if (attachment != null) {
            return Keys.getAttachmentRootKey(attachment);
        }
        String ancestor = request.getParameter("ancestor");
        if (ancestor == null) {
            String referer = request.getHeader("referer");
            if (referer != null) {
                int i1 = referer.indexOf("ancestor=");
                if (i1 != -1) {
                    int i2 = referer.indexOf("&", i1);
                    if (i2 != -1) {
                        ancestor = referer.substring(i1 + 9, i2);
                    } else {
                        ancestor = referer.substring(i1 + 9);
                    }
                }
            }
        }
        if (ancestor != null) {
            return KeyFactory.stringToKey(ancestor);
        }
        return null;
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }
}