/*
    * This file is part of Waarp Project (named also Waarp or GG).
    *
    *  Copyright (c) 2019, Waarp SAS, and individual contributors by the @author
    *  tags. See the COPYRIGHT.txt in the distribution for a full listing of
    * individual contributors.
    *
    *  All Waarp Project 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.
   *
   * Waarp 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
   * Waarp . If not, see <http://www.gnu.org/licenses/>.
   */
  package org.waarp.ftp.core.command.access;
  
  import org.waarp.common.command.NextCommandReply;
  import org.waarp.common.command.exception.Reply421Exception;
  import org.waarp.common.command.exception.Reply501Exception;
  import org.waarp.common.command.exception.Reply530Exception;
  import org.waarp.ftp.core.command.AbstractCommand;
  
  /**
   * USER command
   */
  public class USER extends AbstractCommand {
    @Override
    public final void exec()
        throws Reply501Exception, Reply421Exception, Reply530Exception {
      if (!hasArg()) {
        getSession().reinitFtpAuth();
        throw new Reply501Exception("Need a username as argument");
      }
      final String username = getArg();
      final NextCommandReply nextCommandReply;
      try {
        nextCommandReply = getSession().getAuth().setUser(username);
      } catch (final Reply530Exception e) {
        getSession().reinitFtpAuth();
        throw e;
      }
      setExtraNextCommand(nextCommandReply.command);
      getSession().setReplyCode(nextCommandReply.reply, nextCommandReply.message);
    }
  
  }