/*
    * 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 org.apache.commons.net.examples.nntp;
  
  import java.io.IOException;
  import java.io.PrintWriter;
  
  import org.apache.commons.net.PrintCommandListener;
  import org.apache.commons.net.nntp.Article;
  import org.apache.commons.net.nntp.NNTPClient;
  import org.apache.commons.net.nntp.NewsgroupInfo;
  
  
  /**
   * Simple class showing some of the extended commands (AUTH, XOVER, LIST ACTIVE)
   */
  public class ExtendedNNTPOps {
  
  
      private final NNTPClient client;
  
      public ExtendedNNTPOps() {
          client = new NNTPClient();
          client.addProtocolCommandListener(new PrintCommandListener(new PrintWriter(System.out), true));
      }
  
  
      private void demo(final String host, final String user, final String password) {
          try {
              client.connect(host);
  
              // AUTHINFO USER/AUTHINFO PASS
              if (user != null && password != null) {
                  final boolean success = client.authenticate(user, password);
                  if (success) {
                      System.out.println("Authentication succeeded");
                  } else {
                      System.out.println("Authentication failed, error =" + client.getReplyString());
                  }
              }
  
              // XOVER
              final NewsgroupInfogroupInfo.html#NewsgroupInfo">NewsgroupInfo testGroup = new NewsgroupInfo();
              client.selectNewsgroup("alt.test", testGroup);
              final long lowArticleNumber = testGroup.getFirstArticleLong();
              final long  highArticleNumber = lowArticleNumber + 100;
              final Iterable<Article> articles = client.iterateArticleInfo(lowArticleNumber, highArticleNumber);
  
              for (final Article article : articles) {
                  if (article.isDummy()) { // Subject will contain raw response
                      System.out.println("Could not parse: "+article.getSubject());
                  } else {
                      System.out.println(article.getSubject());
                  }
              }
  
              // LIST ACTIVE
              final NewsgroupInfo[] fanGroups = client.listNewsgroups("alt.fan.*");
              for (final NewsgroupInfo fanGroup : fanGroups)
              {
                  System.out.println(fanGroup.getNewsgroup());
              }
  
          } catch (final IOException e) {
              e.printStackTrace();
          }
      }
  
      public static void main(final String[] args) {
          final ExtendedNNTPOps ops;
  
          final int argc = args.length;
          if (argc < 1) {
              System.err.println("usage: ExtendedNNTPOps nntpserver [username password]");
              System.exit(1);
          }
  
          ops = new ExtendedNNTPOps();
          ops.demo(args[0], argc >=3 ? args[1] : null, argc >=3 ? args[2] : null);
      }
  
  }