content: /*
   * LunaticSMTP
   * Copyright (C) 2016  Anton Larionov
   *
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU 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 General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
   */
  
  package com.gitlab.anlar.lunatic.server;
  
  import com.gitlab.anlar.lunatic.dto.Email;
  import com.gitlab.anlar.lunatic.server.auth.SMTPAuthHandlerFactory;
  import com.gitlab.anlar.lunatic.util.Messages;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.subethamail.smtp.helper.SimpleMessageListenerAdapter;
  import org.subethamail.smtp.server.SMTPServer;
  
  import java.net.BindException;
  import java.util.Collections;
  import java.util.List;
  import java.util.Observer;
  
  public class EmailServer {
      private static final Logger log = LoggerFactory.getLogger(EmailServer.class);
  
      private static EmailServerHandler listener = null;
      private static SMTPServer smtpServer = null;
  
      public static void init(SaverConfig config, boolean loadSavedEmails, String saveDir) {
          listener = new EmailServerHandler(config, loadSavedEmails, saveDir);
      }
  
      public static StartResult start(int port) {
          try {
              smtpServer = new SMTPServer(new SimpleMessageListenerAdapter(listener), new SMTPAuthHandlerFactory());
              smtpServer.setPort(port);
              smtpServer.start();
  
              return new StartResult(true, null);
          } catch (Throwable e) {
              log.error("Failed to start SMTP server", e);
  
              if (e.getCause() instanceof BindException) {
                  return new StartResult(false, String.format(Messages.get("%s, port: %s"), e.getCause().getMessage(), port));
              } else if (e.getCause() instanceof IllegalArgumentException && e.getMessage().contains("out of range")) {
                  return new StartResult(false, String.format(Messages.get("server.error.outofrange"), port));
              } else {
                  return new StartResult(false, e.getLocalizedMessage());
              }
          }
      }
  
      public static void stop() {
          if (smtpServer != null && smtpServer.isRunning()) {
              smtpServer.stop();
          }
      }
  
      public static boolean isRunning() {
          return smtpServer != null && smtpServer.isRunning();
      }
  
      public static void addObserver(Observer observer) {
          listener.addObserver(observer);
      }
  
      public static void clear() {
          listener.clearStorage();
      }
  
      public static List<Email> getEmails() {
          return listener != null ? listener.getEmails() : Collections.emptyList();
      }
  }
  