root/nntp/capabilities.cc

/*  This file is part of Alue, the multiprotocol Internet discussion daemon

    Copyright © 2009 Antti-Juhani Kaijanaho

    Alue 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.

    Alue 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 Alue.  If not, see <http://www.gnu.org/licenses/>.

 */

#include "connection.hh"
#include "lexutils.hh"

namespace nntp 
{
        class capabilities : public connection::command
        {
        public:
                capabilities(const char *s) {
                        connection::register_command(s, this);
                }

                connection::continuation::ptr
                perform(connection::cb, const std::string[],  size_t) const;
        };

        connection::continuation::ptr
        capabilities::perform(connection::cb c,
                              const std::string args[], size_t nargs) const
        {
                // RFC 3977 requires that this be checked ("MUST")
                switch (nargs) {
                case 0:
                        break;
                case 1:
                        if (is_keyword(args[0])) break;
                        /* passthrough */
                default:
                        c.send_line("501 syntax error");
                        return c.dispatch();
                }

                c.capabilities_used() = true;
                c.send_line("101 CAPABILITIES list follows");
                c.send_line("VERSION 2");
                c.send_line("IMPLEMENTATION alue/0");
                for (connection::command_iterator it = c.cmds_begin();
                     it != c.cmds_end(); it++) {
                        it->second->write_capability_line(c);
                }
                c.send_line(".");
                return c.dispatch();
        }

};
namespace {
        nntp::capabilities capabilities("capabilities");
}