webim.service.WebimVisitorManager.java Source code

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Here is the source code for webim.service.WebimVisitorManager.java

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/*
 * WebimVisitorManager.java
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package webim.service;

import javax.annotation.Resource;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Service;

import webim.model.WebimVisitor;

/**
 * Webim?
 * 
 * @author Feng Lee <feng.lee at nextalk.im>
 *
 */
@Service("webimVisitorManager")
public class WebimVisitorManager {

    final static String COOKIE_VID = "_webim_visitor_id";

    @Resource(name = "webimModel")
    private WebimModel model;

    public WebimVisitorManager() {
    }

    /**
     * ?ID
     * 
     * @return
     */
    public boolean isVid(String id) {
        return id.startsWith("vid:");
    }

    /**
     * ???
     * 
     * @param request
     * @param response
     * @return
     */
    public WebimVisitor endpoint(HttpServletRequest request, HttpServletResponse response) {
        String vid = findVid(request);
        if (vid == null) {
            vid = createVid(request, response);
        }
        WebimVisitor visitor = this.model.findVisitor(vid);
        if (visitor == null) {
            visitor = this.model.createVisitor(vid, request);
        }
        return visitor;
    }

    private String findVid(HttpServletRequest request) {
        Cookie cookie = findCookie(request, COOKIE_VID);
        if (cookie != null) {
            return cookie.getValue();
        }
        return null;
    }

    private Cookie findCookie(HttpServletRequest request, String cookieId) {
        Cookie[] cookies = request.getCookies();
        for (Cookie c : cookies) {
            if (c.getName().equals(cookieId)) {
                return c;
            }
        }
        return null;
    }

    private String createVid(HttpServletRequest request, HttpServletResponse response) {
        //TODO: 
        String vid = String.valueOf(System.currentTimeMillis());
        createCookie(response, vid);
        return vid;
    }

    private void createCookie(HttpServletResponse response, String vid) {
        Cookie cookie = new Cookie(COOKIE_VID, vid);
        response.addCookie(cookie);
    }

}