content: /*
   * Copyright (C) 2012-2023 52°North Spatial Information Research GmbH
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 as published
   * by the Free Software Foundation.
   *
   * If the program is linked with libraries which are licensed under one of
   * the following licenses, the combination of the program with the linked
   * library is not considered a "derivative work" of the program:
   *
   *     - Apache License, version 2.0
   *     - Apache Software License, version 1.0
   *     - GNU Lesser General Public License, version 3
   *     - Mozilla Public License, versions 1.0, 1.1 and 2.0
   *     - Common Development and Distribution License (CDDL), version 1.0
   *
   * Therefore the distribution of the program linked with libraries licensed
   * under the aforementioned licenses, is permitted by the copyright holders
   * if the distribution is compliant with both the GNU General Public
   * License version 2 and the aforementioned licenses.
   *
   * 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 General
   * Public License for more details.
   */
  package org.n52.sos.web.admin;
  
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.Map;
  import java.util.Set;
  
  import javax.inject.Inject;
  import javax.servlet.http.HttpServletRequest;
  
  import org.n52.sos.web.common.AbstractController;
  import org.n52.sos.web.common.ControllerConstants;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.stereotype.Controller;
  import org.springframework.web.bind.annotation.ExceptionHandler;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RequestMethod;
  import org.springframework.web.servlet.ModelAndView;
  import org.springframework.web.servlet.view.RedirectView;
  
  /**
   * @since 4.0.0
   *
   */
  @Controller
  @RequestMapping(value = ControllerConstants.Paths.ADMIN_LOGGING)
  public class AdminLoggingController extends AbstractController {
      private static final Logger LOG = LoggerFactory.getLogger(AdminLoggingController.class);
  
      private static final int LOG_MESSAGES = 15;
  
      private static final String LOG_MESSAGES_MODEL_ATTRIBUTE = "logMessages";
  
      private static final String IS_CONSOLE_ENABLED_MODEL_ATTRIBUTE = "isConsoleEnabled";
  
      private static final String IS_FILE_ENABLED_MODEL_ATTRIBUTE = "isFileEnabled";
  
      private static final String ROOT_LOG_LEVEL_MODEL_ATTRIBUTE = "rootLogLevel";
  
      private static final String DAYS_TO_KEEP_MDOEL_ATTRIBUTE = "daysToKeep";
  
      private static final String LOGGER_LEVELS_MODEL_ATTRIBUTE = "loggerLevels";
  
      private static final String MAX_FILE_SIZE_MODEL_ATTRIBUTE = "maxFileSize";
  
      private static final String ERROR_MODEL_ATTRIBUTE = "error";
  
      @Inject
      private AbstractLoggingConfigurator loggingConfigurator;
  
      @RequestMapping(method = RequestMethod.GET)
      public ModelAndView view() {
          Map<String, Object> model = new HashMap<>(5);
          model.put(IS_FILE_ENABLED_MODEL_ATTRIBUTE,
                  loggingConfigurator.isEnabled(AbstractLoggingConfigurator.Appender.FILE));
          model.put(IS_CONSOLE_ENABLED_MODEL_ATTRIBUTE,
                  loggingConfigurator.isEnabled(AbstractLoggingConfigurator.Appender.CONSOLE));
          model.put(ROOT_LOG_LEVEL_MODEL_ATTRIBUTE, loggingConfigurator.getRootLogLevel());
          model.put(DAYS_TO_KEEP_MDOEL_ATTRIBUTE, loggingConfigurator.getMaxHistory());
          model.put(LOGGER_LEVELS_MODEL_ATTRIBUTE, loggingConfigurator.getLoggerLevels());
          model.put(LOG_MESSAGES_MODEL_ATTRIBUTE, loggingConfigurator.getLastLogEntries(LOG_MESSAGES));
          model.put(MAX_FILE_SIZE_MODEL_ATTRIBUTE, loggingConfigurator.getMaxFileSize());
          return new ModelAndView(ControllerConstants.Views.ADMIN_LOGGING, model);
      }
  
      @RequestMapping(method = RequestMethod.POST)
      public ModelAndView save(HttpServletRequest req) {
  
          @SuppressWarnings("unchecked")
          Set<String> parameters = new HashSet<>(Collections.list(req.getParameterNames()));
  
          int daysToKeep = Integer.parseInt(req.getParameter(DAYS_TO_KEEP_MDOEL_ATTRIBUTE));
          parameters.remove(DAYS_TO_KEEP_MDOEL_ATTRIBUTE);
          boolean fileEnabled = parseBoolean(req.getParameter(IS_FILE_ENABLED_MODEL_ATTRIBUTE));
          parameters.remove(IS_FILE_ENABLED_MODEL_ATTRIBUTE);
          boolean consoleEnabled = parseBoolean(req.getParameter(IS_CONSOLE_ENABLED_MODEL_ATTRIBUTE));
          parameters.remove(IS_CONSOLE_ENABLED_MODEL_ATTRIBUTE);
          AbstractLoggingConfigurator.Level rootLevel =
                  AbstractLoggingConfigurator.Level.valueOf(req.getParameter(ROOT_LOG_LEVEL_MODEL_ATTRIBUTE));
          parameters.remove(ROOT_LOG_LEVEL_MODEL_ATTRIBUTE);
          String maxFileSize = req.getParameter(MAX_FILE_SIZE_MODEL_ATTRIBUTE);
          parameters.remove(MAX_FILE_SIZE_MODEL_ATTRIBUTE);
  
          Map<String, AbstractLoggingConfigurator.Level> levels = new HashMap<>(parameters.size());
  
          for (String logger : parameters) {
              levels.put(logger, AbstractLoggingConfigurator.Level.valueOf(req.getParameter(logger)));
          }
  
          loggingConfigurator.setMaxHistory(daysToKeep);
          loggingConfigurator.enableAppender(AbstractLoggingConfigurator.Appender.FILE, fileEnabled);
          loggingConfigurator.enableAppender(AbstractLoggingConfigurator.Appender.CONSOLE, consoleEnabled);
          loggingConfigurator.setRootLogLevel(rootLevel);
          loggingConfigurator.setLoggerLevel(levels);
          loggingConfigurator.setMaxFileSize(maxFileSize);
  
          return new ModelAndView(new RedirectView(ControllerConstants.Paths.ADMIN_LOGGING, true));
      }
  
      @ExceptionHandler(Throwable.class)
      public ModelAndView error(Throwable t) {
          ModelAndView mav = view();
          mav.addObject(ERROR_MODEL_ATTRIBUTE, t.getMessage());
          LOG.error("Error updating the logging configuration.", t);
          return mav;
      }
  }
  