logon.cpp

MUD游戏编程光盘代码

// MUD Programming
// Ron Penton
// (C)2003
// Logon.cpp - This class is the logon handler for SimpleMUD.
// 
// 

#include "Logon.h"
#include "Game.h"
#include "PlayerDatabase.h"
#include "BasicLib/BasicLib.h"

using namespace SocketLib;

namespace SimpleMUD
{

// ------------------------------------------------------------------------
//  This handles incomming commands. Anything passed into this function
//  is assumed to be a complete command from a client.
// ------------------------------------------------------------------------
void Logon::Handle( string p_data )
{

    if( m_errors == 5 )
    {
        m_connection->Protocol().SendString( *m_connection, red + bold + 
            "Too many incorrect responses, closing connection..." + 
            newline );
        m_connection->Close();
        return;
    }


    if( m_state == NEWCONNECTION )  // has not entered name yet
    {
        if( BasicLib::LowerCase( p_data ) == "new" )
        {
            m_state = NEWUSER;
            m_connection->Protocol().SendString( *m_connection, yellow + 
                "Please enter your desired name: " + reset );
        }
        else
        {
            PlayerDatabase::iterator itr = PlayerDatabase::findfull( p_data );
            if( itr == PlayerDatabase::end() )
            {
                // name does not exist
                m_errors++;
                m_connection->Protocol().SendString( *m_connection,
                    red + bold + "Sorry, the user \"" + white + p_data + red +
                    "\" does not exist.\r\n" + 
                    "Please enter your name, or \"new\" if you are new: " + 
                    reset );
            }
            else
            {
                // name exists, go to password entrance.
                m_state = ENTERPASS;
                m_name = p_data;
                m_pass = itr->Password();
                
                m_connection->Protocol().SendString( *m_connection,
                    green + bold + "Welcome, " + white + p_data + red +
                    newline + green + "Please enter your password: " + 
                    reset );
            }
        }

        return;
    }

    if( m_state == NEWUSER )
    {
        // check if the name is taken:
        if( PlayerDatabase::hasfull( p_data ) )
        {
            m_errors++;
            m_connection->Protocol().SendString( *m_connection,
                red + bold + "Sorry, the name \"" + white + p_data + red +
                "\" has already been taken." + newline + yellow + 
                "Please enter your desired name: " + reset );
        }
        else
        {
            if( !AcceptibleName( p_data ) )
            {
                m_errors++;
                m_connection->Protocol().SendString( *m_connection,
                    red + bold + "Sorry, the name \"" + white + p_data + red +
                    "\" is unacceptible." + newline + yellow + 
                    "Please enter your desired name: " + reset );
            }
            else
            {
                m_state = ENTERNEWPASS;
                m_name = p_data;
                m_connection->Protocol().SendString( *m_connection,
                        green + "Please enter your desired password: " + 
                        reset );
            }
        }

        return;
    }

    if( m_state == ENTERNEWPASS )
    {
        if( p_data.find_first_of( BasicLib::WHITESPACE ) != string::npos )
        {
            m_errors++;
            m_connection->Protocol().SendString( *m_connection,
                    red + bold + "INVALID PASSWORD!" + 
                    green + "Please enter your desired password: " + 
                    reset );
            return;
        }

        m_connection->Protocol().SendString( *m_connection,
                green + "Thank you! You are now entering the realm..." + 
                newline );

        Player p;
        p.Name() = m_name;
        p.Password() = p_data;

        // make the player the administrator if he's the first to log in.
        if( PlayerDatabase::size() == 0 )
        {
            p.Rank() = ADMIN;
            p.ID() = 1;
        }
        else
        {
            p.ID() = PlayerDatabase::LastID() + 1;
        }

        // add the player
        PlayerDatabase::AddPlayer( p );

        // enter the game as a newbie.
        GotoGame( true );

        return;
    }

    if( m_state == ENTERPASS )
    {
        if( m_pass == p_data )
        {
            m_connection->Protocol().SendString( *m_connection,
                    green + "Thank you! You are now entering the realm..." + 
                    newline );
            
            // enter the game
            GotoGame();
        }
        else
        {
            m_errors++;
            m_connection->Protocol().SendString( *m_connection,
                    red + bold + "INVALID PASSWORD!" + newline + 
                    yellow + "Please enter your password: " + 
                    reset );
        }

        return;
    }
}


// ------------------------------------------------------------------------
//  This notifies the handler that there is a new connection
// ------------------------------------------------------------------------
void Logon::Enter()
{
    USERLOG.Log(  
        GetIPString( m_connection->GetRemoteAddress() ) + 
        " - new connection in login state." );

    m_connection->Protocol().SendString( *m_connection,
        red + bold + "Welcome To SimpleMUD v1.0\r\n" + 
        "Please enter your name, or \"new\" if you are new: " + reset );
}

// ------------------------------------------------------------------------
//  This changes the game state so that the player enters the game.
// ------------------------------------------------------------------------
void Logon::GotoGame( bool p_newbie )
{
    Player& p = *PlayerDatabase::findfull( m_name );
    
    // log off the user if he's already connected.            
    if( p.LoggedIn() )
    {
        p.Conn()->Close();
        p.Conn()->Handler()->Hungup();
        p.Conn()->ClearHandlers();
    }

    p.Newbie() = p_newbie;

    // record the users new connection
    p.Conn() = m_connection;

    // go to the game.
    p.Conn()->RemoveHandler();
    p.Conn()->AddHandler( new Game( *p.Conn(), p.ID() ) );
}

// ------------------------------------------------------------------------
//  This checks if a user name is acceptible.
// ------------------------------------------------------------------------
bool Logon::AcceptibleName( const string& p_name )
{
    static string inv = " \"'~!@#$%^&*+/\\[]{}<>()=.,?;:";

    // must not contain any invalid characters
    if(  p_name.find_first_of( inv ) != string::npos )
        return false;

    // must be less than 17 chars and more than 2
    if( p_name.size() > 16 || p_name.size() < 3 )
        return false;

    // must start with an alphabetical character
    if( !isalpha( p_name[0] ) )
        return false;

    if( p_name == "new" )
        return false;

    return true;
}



}   // end namespace SimpleMUD