//

// Copyright (C) 2001-2023 Graeme Walker <graeme_walker@users.sourceforge.net>

// 

// Copying and distribution of this file, with or without modification,

// are permitted in any medium without royalty provided the copyright

// notice and this notice are preserved.  This file is offered as-is,

// without any warranty.

// ===

//

// emailrelay-set-from.js

//

// An example "--filter" script that edits the content originator fields

// (ie. From, Sender and Reply-To) to a fixed value.

//

// Also consider setting the envelope-from field by editing the envelope

// file, as in emailrelay-edit-envelope.js.

//

// See also: emailrelay-set-from.pl, RFC-2822

//

try

{

	var new_from = 'noreply@example.com' ;

	var new_sender = '' ;

	var new_reply_to = new_from ;



	var content = WScript.Arguments( 0 ) ;

	var fs = WScript.CreateObject( "Scripting.FileSystemObject" ) ;

	var in_ = fs.OpenTextFile( content , 1 , false ) ;

	var out_ = fs.OpenTextFile( content + ".tmp" , 8 , true ) ;



	var re_from = /^From:/i ;

	var re_sender = /^Sender:/i ;

	var re_reply_to = /^Reply-To:/i ;

	var re_fold = /^[ \t]/ ;



	var in_edit = 0 ;

	while( !in_.AtEndOfStream )

	{

		var line = in_.ReadLine() ;

		if( line === "" )

		{

			out_.WriteLine( line ) ;

			break ;

		}



		if( line.match(re_from) && new_from !== null )

		{

			in_edit = 1 ;

			line = "From: " + new_from ;

			out_.WriteLine( line ) ;

		}

		else if( line.match(re_sender) && new_sender !== null )

		{

			in_edit = 1 ;

			line = "Sender: " + new_sender ;

			if( new_sender !== "" )

			{

				out_.WriteLine( line ) ;

			}

		}

		else if( line.match(re_reply_to) && new_reply_to !== null )

		{

			in_edit = 1 ;

			line = "Reply-To: " + new_reply_to ;

			out_.WriteLine( line ) ;

		}

		else if( in_edit && line.match(re_fold) )

		{

		}

		else

		{

			in_edit = 0 ;

			out_.WriteLine( line ) ;

		}

	}

	while( !in_.AtEndOfStream )

	{

		var body_line = in_.ReadLine() ;

		out_.WriteLine( body_line ) ;

	}



	in_.Close() ;

	out_.Close() ;

	fs.DeleteFile( content ) ;

	fs.MoveFile( content + ".tmp" , content ) ;



	WScript.Quit( 0 ) ;

}

catch( e )

{

	WScript.StdOut.WriteLine( "<<edit failed>>" ) ;

	WScript.StdOut.WriteLine( "<<" + e + ">>" ) ;

	WScript.Quit( 1 ) ;

}

