org.obm.sync.resource.ResourceServlet.java Source code

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Here is the source code for org.obm.sync.resource.ResourceServlet.java

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/* ***** BEGIN LICENSE BLOCK *****
 * 
 * Copyright (C) 2011-2014  Linagora
 *
 * 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, provided you comply 
 * with the Additional Terms applicable for OBM connector by Linagora 
 * pursuant to Section 7 of the GNU Affero General Public License, 
 * subsections (b), (c), and (e), pursuant to which you must notably (i) retain 
 * the Message sent thanks to OBM, Free Communication by Linagora? 
 * signature notice appended to any and all outbound messages 
 * (notably e-mail and meeting requests), (ii) retain all hypertext links between 
 * OBM and obm.org, as well as between Linagora and linagora.com, and (iii) refrain 
 * from infringing Linagora intellectual property rights over its trademarks 
 * and commercial brands. Other Additional Terms apply, 
 * see <http://www.linagora.com/licenses/> for more details. 
 *
 * 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 
 * and its applicable Additional Terms for OBM along with this program. If not, 
 * see <http://www.gnu.org/licenses/> for the GNU Affero General Public License version 3 
 * and <http://www.linagora.com/licenses/> for the Additional Terms applicable to 
 * OBM connectors. 
 * 
 * ***** END LICENSE BLOCK ***** */

package org.obm.sync.resource;

import java.io.IOException;
import java.util.Collection;
import java.util.Date;

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

import org.obm.icalendar.Ical4jHelper;
import org.obm.sync.auth.ServerFault;
import org.obm.sync.calendar.Event;
import org.obm.sync.calendar.SyncRange;
import org.obm.sync.services.ICalendar;
import org.obm.sync.utils.DateHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Strings;
import com.google.common.collect.Iterables;
import com.google.inject.Inject;
import com.google.inject.Singleton;

import fr.aliacom.obm.common.calendar.ResourceNotFoundException;

@Singleton
public class ResourceServlet extends HttpServlet {

    private final Logger logger = LoggerFactory.getLogger(ResourceServlet.class);
    private final ICalendar calendarBinding;
    private final Ical4jHelper ical4jHelper;

    @Inject
    @VisibleForTesting
    ResourceServlet(ICalendar calendarBinding, Ical4jHelper ical4jHelper) {
        this.calendarBinding = calendarBinding;
        this.ical4jHelper = ical4jHelper;

    }

    @Override
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String resourceEmail = extractResourceEmail(request);
        if (resourceEmail == null) {
            response.setStatus(HttpServletResponse.SC_NOT_FOUND);
            logger.warn("The email of the resource is null or empty ");
            return;
        }

        try {
            response.setContentType("text/calendar;charset=UTF-8");
            String resourceICS = getResourceICS(resourceEmail, extractSyncRange(request));

            if (resourceICS == null) {
                response.setStatus(HttpServletResponse.SC_NO_CONTENT);
            } else {
                response.getWriter().write(resourceICS);
                response.setStatus(HttpServletResponse.SC_OK);
            }
        } catch (ResourceNotFoundException e) {
            logger.error(e.getMessage(), e);
            response.setStatus(HttpServletResponse.SC_NOT_FOUND);
            response.flushBuffer();
        } catch (ServerFault e) {
            logger.error(e.getMessage(), e);
            response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
            response.flushBuffer();
        }
    }

    private String extractResourceEmail(HttpServletRequest request) {
        String pathInfo = Strings.nullToEmpty(request.getPathInfo()).replaceFirst("^/", "");
        String resourceEmail;
        if (Strings.isNullOrEmpty(pathInfo)) {
            resourceEmail = null;
        } else {
            resourceEmail = pathInfo;
        }
        return resourceEmail;
    }

    private SyncRange extractSyncRange(HttpServletRequest request) {
        Date after = DateHelper.asDate(request.getParameter("syncRangeAfter"), null);

        if (after == null) {
            return null;
        }

        return new SyncRange(null, after);
    }

    @VisibleForTesting
    String getResourceICS(String resourceEmail, SyncRange syncRange) throws ServerFault {
        Collection<Event> resourceEvents = calendarBinding.getResourceEvents(resourceEmail, new Date(), syncRange);

        if (Iterables.isEmpty(resourceEvents)) {
            return null;
        }

        return this.ical4jHelper.buildIcsWithTimeZoneOnDtStart(null, resourceEvents, null);
    }
}