emailrelay-edit-content.js

//
// SPDX-FileCopyrightText: 2026 Graeme Walker <graeme_walker@users.sourceforge.net>
// SPDX-License-Identifier: FSFAP
//
// Copyright (c) 2026 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-edit-content.js
//
// An example E-MailRelay filter script for Windows that
// edits the message's content file.
//
// In this example every "teh" is changed to "the".
//
try
{
    // parse the command-line to get the content filename
    var content = WScript.Arguments(0) ;

    // open the content file
    var fs = WScript.CreateObject( "Scripting.FileSystemObject" ) ;
    var in_ = fs.OpenTextFile( content , 1 , false ) ;

    // create the new content file
    var out_ = fs.OpenTextFile( content + ".tmp" , 8 , true ) ;

    // read the headers
    while( !in_.AtEndOfStream )
    {
            var line = in_.ReadLine() ;
            out_.WriteLine( line ) ;
            if( line === "" )
                    break ;
    }

    // read and edit the body
    var re = new RegExp( "\\bteh\\b" , "gi" ) ;
    while( !in_.AtEndOfStream )
    {
            var line = in_.ReadLine() ;
            line = line.replace( re , "the" ) ;
            out_.WriteLine( line ) ;
    }

    // replace the content file
    in_.Close() ;
    out_.Close() ;
    fs.DeleteFile( content ) ;
    fs.MoveFile( content + ".tmp" , content ) ;

    // successful exit
    WScript.Quit( 0 ) ;
}
catch( e )
{
    // report errors using the special <<...>> markers
    WScript.StdOut.WriteLine( "<<edit failed>>" ) ;
    WScript.StdOut.WriteLine( "<<" + e + ">>" ) ;
    WScript.Quit( 1 ) ;
}