#!/usr/bin/perl
# Copyright (C) Dirk Husemann, Computer Science Department IV, 
# 		 University of Erlangen-Nuremberg, Germany, 1993
# All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 3. All advertising materials mentioning features or use of this software
#    must display the following acknowledgement:
#      This product includes software developed by the Dirk Husemann,
#      University of Erlangen-N|rnberg, Germany.
# 4. The name of the University may not be used to endorse or promote
#    products derived from this software without specific prior written
#    permission. 
# 
# THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
# EVENT SHALL THE UNIVERSITY BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

# debugging output
#open(STDOUT, ">>/tmp/faxmailer.out");

$faxmaster = "FaxMaster";
$sendmail = "/usr/sbin/sendmail";
$faxinfo = "/usr/spool/fax/bin/faxinfo";
$fax2ps = "/usr/contrib/fax/bin/fax2ps";
$mimencode = "/usr/contrib/metamail/bin/mimencode";
$faxhome = "/usr/contrib/fax/bin";
$hostname = `hostname`; chop $hostname;
$myname = "i4fax-daemon";

# get path right
$execpath = $ENV{'PATH'};
$execpath = $faxhome . ":" . $execpath;
$ENV{'PATH'} = $execpath;

sub normmonth {
    local($_) = @_;

    study;
    s/oct|10/Oct/i;
    s/nov|11/Nov/i;
    s/dec|12/Dec/i;
    s/jan|0?1/Jan/i;
    s/feb|0?2/Feb/i;
    s/mar|0?3/Mar/i;
    s/apr|0?4/Apr/i;
    s/may|0?5/May/i;
    s/jun|0?6/Jun/i;
    s/jul|0?7/Jul/i;
    s/aug|0?8/Aug/i;
    s/sep|0?9/Sep/i;
    $_;
}

$received_fax = $ARGV[0];
if (! defined($received_fax)) {
   exit -1;
}

open(FAXINFO, "$faxinfo $received_fax|") || 
              die "$faxinfo didn't work out...\n";
@faxinfo = <FAXINFO>;
close(FAXINFO);

(($sender) = grep(/\s*Sender:/, @faxinfo)) && (chop $sender) 
           && ($sender =~ /:\s*([+\d\s]+)$/) && ($sender = $1) && 
           ($sender =~ s/\s/\./g);
(($pages) = grep(/\s*Pages:/, @faxinfo)) && (chop $pages) 
           && ($pages =~ /:\s*(\d+)$/) && ($pages = $1);
(($quality) = grep(/\s*Quality:/, @faxinfo)) && (chop $quality) 
           && ($quality =~ /:\s*(\w+)$/) && ($quality = $1);
(($pagesize) = grep(/\s*Page:/, @faxinfo)) && (chop $pagesize) 
           && ($pagesize =~ /:\s*([\w\d]+)$/) && ($pagesize = $1);
(($timestamp) = grep(/\s*Received:/, @faxinfo)) && (chop $timestamp) 
           && ($timestamp =~ /:\s*([:\d\s]+)$/) && ($timestamp = $1);

($timestamp =~ /(\d+)\:(\d+)\:(\d+)\s+(\d+\:\d+:\d+)/)
           && ($year = $1, $month = $2, $day = $3, $time = $4);

$month = &normmonth($month);

if ($pages > 1) {
   $page_noun = "pages";
} else {
  $page_noun = "page";
}

$MIME_boundary = "MIME-FlexFax";
open(NOTIFYMAIL, "|$sendmail -oib -f$myname -t") || 
    die "Couldn't pipe to $sendmail ...\n";
#open(NOTIFYMAIL, ">/tmp/faxnotify.$$") || 
#    die "Couldn't open mail file ...\n";

print NOTIFYMAIL <<END_OF_MAILHEAD;
To: $faxmaster
From: $sender@i4fax
Subject: FAX from >$sender< ($pages $page_noun)
MIME-Version: 1.0
Content-Description: A MIME message composed by the I4FAX-Daemon.
END_OF_MAILHEAD

printf NOTIFYMAIL "Content-type: multipart/mixed;\n";
printf NOTIFYMAIL "   boundary=$MIME_boundary\n";
printf NOTIFYMAIL "\n";

print NOTIFYMAIL <<END_OF_MIME_BLURB;
> This is  a multimedia message in MIME  format.  If you are reading this
> prefix, your mail reader does  not understand MIME.  You may wish
> to look into upgrading to a newer version of  your mail reader.

--$MIME_boundary
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

The following facsimile consisting of $pages $page_noun was received
from >$sender< at $time on $month $day, $year.

    Quality:            $quality
    Pagesize:           $pagesize

The facsimile has been enclosed as a PostScript image.

    Sincerely,
    i4fax-daemon

--$MIME_boundary
Content-Type: application/postscript
Content-Transfer-Encoding: base64

END_OF_MIME_BLURB

close(STDERR);
open(MIMENCODE, "$fax2ps -s $received_fax | $mimencode -b |");
while ($mimeline = <MIMENCODE>) {
      print NOTIFYMAIL $mimeline;
}
close(MIMENCODE);

printf NOTIFYMAIL "\n--$MIME_boundary\n";
close(NOTIFYMAIL);

# dump tiff image file
unlink($received_fax);

exit;