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/*
 * ============LICENSE_START==========================================
 * ONAP Portal SDK
 * ===================================================================
 * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
 * ===================================================================
 *
 * Unless otherwise specified, all software contained herein is licensed
 * under the Apache License, Version 2.0 (the "License");
 * you may not use this software 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.
 *
 * Unless otherwise specified, all documentation contained herein is licensed
 * under the Creative Commons License, Attribution 4.0 Intl. (the "License");
 * you may not use this documentation except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *             https://creativecommons.org/licenses/by/4.0/
 *
 * Unless required by applicable law or agreed to in writing, documentation
 * 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.
 *
 * ============LICENSE_END============================================
 *
 * 
 */
package org.onap.portalapp.controller.core;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

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

import org.json.JSONArray;
import org.json.JSONObject;
import org.onap.portalsdk.core.command.UserRowBean;
import org.onap.portalsdk.core.controller.RestrictedBaseController;
import org.onap.portalsdk.core.logging.logic.EELFLoggerDelegate;
import org.onap.portalsdk.core.util.UsageUtils;
import org.onap.portalsdk.core.web.support.JsonMessage;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping("/")
public class UsageListController extends RestrictedBaseController {

        private static final EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(UsageListController.class);

        private static final String ACTIVE_USERS = "activeUsers";

        private void addUsers2jsonArray(JSONArray ja,HashMap activeUsers,String httpSessionId)
  {
    List<UserRowBean> rows = UsageUtils.getActiveUsers(activeUsers);
                for (UserRowBean userRowBean : rows)
                  ja.put(userRowBean2json(userRowBean,httpSessionId));
  }

        private JSONObject userRowBean2json(UserRowBean userRowBean,String httpSessionId)
  {
    JSONObject jo = new JSONObject();
    jo.put("id", userRowBean.getId());
    jo.put("lastName", userRowBean.getLastName());
    jo.put("email", userRowBean.getEmail());
    jo.put("lastAccess", userRowBean.getLastAccess());
    jo.put("remaining", userRowBean.getRemaining());
    jo.put("sessionId", userRowBean.getSessionId());
    if (!httpSessionId.equals(userRowBean.getSessionId())) {
      jo.put("delete", "yes");
    } else {
      jo.put("delete", "no");
    }

    return jo;
  }

        @SuppressWarnings({ "unchecked", "rawtypes" })
        @RequestMapping(value = { "/usage_list" }, method = RequestMethod.GET)
        public ModelAndView usageList(HttpServletRequest request) {
                Map<String, Object> model = new HashMap<>();

                HttpSession httpSession = request.getSession();
                HashMap activeUsers = (HashMap) httpSession.getServletContext().getAttribute(ACTIVE_USERS);
                if (activeUsers.size() == 0) {
                        activeUsers.put(httpSession.getId(), httpSession);
                        httpSession.getServletContext().setAttribute(ACTIVE_USERS, activeUsers);
                }

                JSONArray ja = new JSONArray();
                try {
      addUsers2jsonArray(ja,activeUsers,httpSession.getId());
                } catch (Exception e) {
                        logger.error(EELFLoggerDelegate.errorLogger, "usageList failed", e);
                }

                model.put("model", ja);

                return new ModelAndView(getViewName(), model);
        }

        @SuppressWarnings({ "unchecked", "rawtypes" })
        @RequestMapping(value = { "/get_usage_list" }, method = RequestMethod.GET)
        public void getUsageList(HttpServletRequest request, HttpServletResponse response) {

                HttpSession httpSession = request.getSession();
                HashMap activeUsers = (HashMap) httpSession.getServletContext().getAttribute(ACTIVE_USERS);
                if (activeUsers.size() == 0) {
                        activeUsers.put(httpSession.getId(), httpSession);
                        httpSession.getServletContext().setAttribute(ACTIVE_USERS, activeUsers);
                }
                JSONArray ja = new JSONArray();
                try {
      addUsers2jsonArray(ja,activeUsers,httpSession.getId());
                } catch (Exception e) {
                        logger.error(EELFLoggerDelegate.errorLogger, "getUsageList failed", e);
                }
                JsonMessage msg;
                try {
                        msg = new JsonMessage(ja.toString());
                        JSONObject j = new JSONObject(msg);
                        response.getWriter().write(j.toString());
                } catch (Exception e) {
                        logger.error(EELFLoggerDelegate.errorLogger, "getUsageList failed to serialize", e);
                }

        }

        @SuppressWarnings("rawtypes")
        @RequestMapping(value = { "/usage_list/removeSession" }, method = RequestMethod.GET)
        public void removeSession(HttpServletRequest request, HttpServletResponse response) throws IOException {
                HashMap activeUsers = (HashMap) request.getSession().getServletContext().getAttribute(ACTIVE_USERS);
                UserRowBean data = new UserRowBean();
                data.setSessionId(request.getParameter("deleteSessionId"));
                UsageUtils.getActiveUsersAfterDelete(activeUsers, data);

                HttpSession httpSession = request.getSession();
                JSONArray ja = new JSONArray();
                try {
      addUsers2jsonArray(ja,activeUsers,httpSession.getId());
                } catch (Exception e) {
                        logger.error(EELFLoggerDelegate.errorLogger, "removeSession failed", e);
                }

                response.setContentType("application/json");
                PrintWriter out = response.getWriter();
                out.write(ja.toString());
        }

}