/*
 *	The contents of this file are subject to the Netscape Public License 
 *	Version 1.0 (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.mozilla.org/NPL/. 
 *	
 *	Software distributed under the License is distributed on an "AS IS" basis, 
 *	WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 
 *	for the specific language governing rights and limitations under the License. 
 *	
 *	The Original Code is the Netscape Messaging Access SDK Version 3.5 code, 
 *	released on or about June 15, 1998. 
 *	
 *	The Initial Developer of the Original Code is Netscape Communications 
 *	Corporation. Portions created by Netscape are Copyright (C) 1998 Netscape 
 *	Communications Corporation. All Rights Reserved. 
 *	
 *	Contributor(s): ______________________________________. 
*/
  
/*
 * Copyright (c) 1997 and 1998 Netscape Communications Corporation
 * (http://home.netscape.com/misc/trademarks.html)
 */

package netscape.messaging.smtp;

/**
*SMTPSink is the default implementation of the response sink for all
*SMTP commands.
*<p>The SMTPSink object contains callback methods for each client call.
*The client’s processResponses call invokes the appropriate
*object method.
*<p>The Messaging Access SDK provides the SMTPSink class as a convenience
*implementation the ISMTPSink interface.
*You can save a step by extending the SMTPSink class, or
*you can implement your own class based on the ISMTPSink
*interface. The constructor for the SMTPClient class takes an
*ISMTPSink interface as a parameter.
*<p>These methods return standard SMTP Response Codes, as defined in RFC 821.
*See SMTP Response Codes in Chapter 2, "Sending Mail with SMTP"
*for more information. For detailed information about SMTP,
*see RFC 821. (For the URL, see "Where to Find More Information" in "About This Book.")
*@author derekt@netscape.com
*@version 1.0
*/

public class SMTPSink implements ISMTPSink
{
    /**
    *Notification for the response to the BDAT command.
    *Sends binary data chunks of the specified size to the server.
    *When using the sendCommand method, send data with the data method
    *and not with bdat.
    *Note: bdat is not supported by Messaging Server 4.0. Use data instead.
    *<p>See SMTP Response Codes in Chapter 2, "Sending Mail with SMTP."
    * @param in_responseCode 3-digit Response Code, as defined in RFC 821, for the response.
    * @param in_responseMessage Text that describes the 3-digit Response Code.
    * @see SMTPClient#bdat
    * @see #data
    * @see #send
    */
    public void bdat( int in_responseCode, StringBuffer in_responseMessage ) {}

    /**
    *Notification for the response to the connection to the server.
    *<P>Connects to the server using the default port.
    *See SMTP Response Codes in Chapter 2, "Sending Mail with SMTP."
    * @param in_responseCode 3-digit Response Code, as defined in RFC 821, for the response.
    * @param in_responseMessage Text that describes the 3-digit Response Code.
    * @see SMTPClient#connect
    * @see #quit
    */
    public void connect( int in_responseCode, StringBuffer in_responseMessage ) {}

    /**
    *Notification for the response to the DATA command.
    *Prepares to send data to the server. The sendCommand method requires
    *sending data with the data method and not with bdat.
    *For more information, see RFC 821 (URL: go to  SMTP RFCs).
    *See "SMTP Response Codes" in Chapter 2, "Sending Mail with SMTP."
    * @param in_responseCode 3-digit Response Code, as defined in RFC 821, for the response.
    * @param in_responseMessage Text that describes the 3-digit Response Code.
    * @see SMTPClient#data
    * @see #bdat
    * @see #send
    */
    public void data( int in_responseCode, StringBuffer in_responseMessage ) {}

    /**
    *Notification for the response to the EHLO command.
    *Along with ehloComplete, returns extended server information.
    *Can get extended server information (which can be multiline).
    *See SMTP Response Codes in Chapter 2, "Sending Mail with SMTP."
    * @param in_responseCode 3-digit Response Code, as defined in RFC 821, for the response.
    * @param in_serverInfo Extension supported by the server.
    * @see SMTPClient#ehlo
    * @see #ehloComplete
    */
    public void ehlo( int in_responseCode, StringBuffer in_serverInfo ) {}

    /**
    *Notification for the completion of the EHLO command.
    *Along with ehlo, returns extended server information.
    * @see SMTPClient#ehlo
    * @see #ehlo
    */
    public void ehloComplete() {}

    /**
    *Error notification.
    *Called when an error occurs.
    * See SMTP Response Codes in Chapter 2, "Sending Mail with SMTP."
    * @param in_responseCode 3-digit Response Code, as defined in RFC 821, for the response.
    * @param in_errorMessage Text that describes the error.
    * @exception SMTPServerException If a server response error occurs.
    * @see SMTPClient#processResponses
    */
	public void error( int in_responseCode, StringBuffer in_errorMessage ) throws SMTPServerException
	{
	    throw new SMTPServerException();
	}

    /**
    *Notification for the response to the EXPN command.
    *Along with expandComplete, gets the email address of the specified user.
    * See SMTP Response Codes in Chapter 2, "Sending Mail with SMTP."
    * @param in_responseCode 3-digit Response Code, as defined in RFC 821, for the response.
    * @param in_user User for whom to get an email address.
    * @see SMTPClient#expand
    * @see #expandComplete
    */
    public void expand( int in_responseCode, StringBuffer in_user ) {}

    /**
    *Notification for the completion of the EXPN command.
    *Along with expand, gets the email address of the specified user.
    * @see SMTPClient#expand
    * @see #expand
    */
    public void expandComplete() {}

    /**
    *Notification for the response to the HELP command.
    *Along with helpComplete, gets help on the specified topic,
    *which can be multiline.
    * See SMTP Response Codes in Chapter 2, "Sending Mail with SMTP."
    * @param in_responseCode 3-digit Response Code, as defined in RFC 821, for the response.
    * @param in_help Line of help text.
    * @see SMTPClient#help
    * @see #helpComplete
    */
    public void help( int in_responseCode, StringBuffer in_help ) {}

    /**
    *Notification for the completion of the HELP command.
    *Along with help, gets help on a specified topic.
    * @see SMTPClient#help
    * @see #help
    */
    public void helpComplete() {}

    /**
    *Notification for the response to the MAIL FROM command.
    * See SMTP Response Codes in Chapter 2, "Sending Mail with SMTP."
    * @param in_responseCode 3-digit Response Code, as defined in RFC 821, for the response.
    * @param in_responseMessage Text that describes the 3-digit Response Code.
    * @see SMTPClient#mailFrom
    * @see #rcptTo
    */
    public void mailFrom( int in_responseCode, StringBuffer in_responseMessage ) {}

    /**
    *Notification for the response to the NOOP command.
    *<P>The server responds to commands with a "still here" response.
    *Sending the noop method does nothing except force this response.
    *Can be used to maintain server connection, perhaps being issued
    *at timed intervals to make sure that the server is still active.
    *<p>Resets the autologout timer inside the server.
    *Not needed by applications that do something and do not maintain the connection.
    * See SMTP Response Codes in Chapter 2, "Sending Mail with SMTP."
    * @param in_responseCode 3-digit Response Code, as defined in RFC 821, for the response.
    * @param in_responseMessage Text that describes the 3-digit Response Code.
    * @see SMTPClient#noop
    */
    public void noop( int in_responseCode, StringBuffer in_responseMessage ) {}

    /**
    *Notification sink for the response to the QUIT command.
    *Ends the session. If the session is in the Authentication state,
    *the server closes the server connection. If the session is in
    *the Transaction state, the server goes into the Update state
    *and deletes any marked messages, and then quits.
    * See "SMTP Response Codes" in Chapter 2, "Sending Mail with SMTP."
    * @param in_responseCode 3-digit Response Code, as defined in RFC 821, for the response.
    * @param in_responseMessage Text that describes the 3-digit Response Code.
    * @see SMTPClient#quit
    */
    public void quit( int in_responseCode, StringBuffer in_responseMessage ) {}

    /**
    *Notification for the response to the RCPT TO command.
    *Gets the address of the recipient of the message. Called once for each
    *recipient; should follow the SMTP_mailFrom function.
    * See "SMTP Response Codes" in Chapter 2, "Sending Mail with SMTP."
    * @param in_responseCode 3-digit Response Code, as defined in RFC 821, for the response.
    * @param in_responseMessage Text that describes the 3-digit Response Code.
    * @see SMTPClient#rcptTo
    * @see #mailFrom
    */
    public void rcptTo( int in_responseCode, StringBuffer in_responseMessage ) {}

    /**
    *Notification for the response to the RSET command.
    *Cancels the current mail transfer and all current processes,
    *discards data, and clears all states. Returns to the state that
    *followed the last method that sent the EHLO command.
    *Returns a response code and optional response text.
    * See "SMTP Response Codes" in Chapter 2, "Sending Mail with SMTP."
    * @param in_responseCode 3-digit Response Code, as defined in RFC 821, for the response.
    * @param in_responseMessage Text that describes the 3-digit Response Code.
    * @see SMTPClient#reset
    * @see #ehlo
    */
    public void reset( int in_responseCode, StringBuffer in_responseMessage ) {}

    /**
    *Notification for the response to data sent to the server.
    *Returns a response code and optional response text.
    *This method requires using the SMTP_data command to send data,
    *rather than SMTP_bdat.
    * See SMTP Response Codes in Chapter 2, "Sending Mail with SMTP."
    * @param in_responseCode 3-digit Response Code, as defined in RFC 821, for the response.
    * @param in_responseMessage Text that describes the 3-digit Response Code.
    * @see SMTPClient#send
    * @see #data
    */
    public void send( int in_responseCode, StringBuffer in_responseMessage ) {}

    /**
    *Notification for the response to sendCommand() method.
    *Along with sendCommandComplete, extends the protocol to
    *meet client application needs. Sends commands that are not supported
    *by the Messaging SDK implementation of SMTP.
    *Can get extended server information, possibly multiline.
    * See SMTP Response Codes in Chapter 2, "Sending Mail with SMTP."
    * @param in_responseCode 3-digit Response Code, as defined in RFC 821, for the response.
    * @param in_responseLine Buffer for the response message.
    * @see SMTPClient#sendCommand
    * @see #sendCommandComplete
    */
    public void sendCommand( int in_responseCode, StringBuffer in_responseLine ) {}

    /**
    *Notification for the completion of the extended command.
    *Along with sendCommand, extends the protocol to meet client application
    *needs.
    * @see SMTPClient#sendCommand
    * @see #sendCommand
    */
    public void sendCommandComplete() {}

    /**
    *Notification for the response to the VRFY command.
    *Returns a response code and optional response text.
    *For more information, see RFC 821 (URL are listed in SMTP RFCs).
    * See SMTP Response Codes in Chapter 2, "Sending Mail with SMTP."
    * @param in_responseCode 3-digit Response Code, as defined in RFC 821, for the response.
    * @param in_responseMessage Buffer for the response message.
    * @see SMTPClient#verify
    */
    public void verify( int in_responseCode, StringBuffer in_responseMessage ) {}
}
