#!/usr/bin/zsh
#Usage: cat HEADERS-USENET-POST | b
#Changes headers for an incoming Usenet post to their corresponding
# outgoing forms.

#(C)opyright 2004,2007 J.H.Boersema
#Released under the provisions of the GNU GPL3 License.
#This is free software, no warranty whatsoever. Use at your own risk.

#Organization: header
#anything
ORG="YOUR-ORG"
#ORG=""

#From: header
#slrn uses e-mail address to verify cancel message, use same as in ~/.slrnrc
FROM="\"Name\" <email@address.net>"
#FROM=""

#Reply-To: header
#anything
REPLY="email@address.net"
#REPLY=""

#Temp-files
TMPFILE_A="/tmp/${USER}-${$}-tmpa"
TMPFILE_B="/tmp/${USER}-${$}-tmpb"
TMPFILE_C="/tmp/${USER}-${$}-tmpc"

#read pipe
tee > "${TMPFILE_A}"
egrep '^Newsgroups: ' "${TMPFILE_A}" >"${TMPFILE_B}"
egrep '^Subject: ' "${TMPFILE_A}" | egrep -v '^Subject: [rR]e: ' | sed -e 's/^Subject: /Subject: Re: /' >>"${TMPFILE_B}"
egrep '^Subject: [Rr]e: ' "${TMPFILE_A}" >>"${TMPFILE_B}"

#---------------------------references----------------------
REF="0"
REF=$( egrep '^References: ' "${TMPFILE_A}" | wc -c )
if test "0" -eq "${REF}"
	then
		egrep -i '^Message-Id: ' "${TMPFILE_A}" |sed 's/^.*: /References: /;' >>"${TMPFILE_B}"
	else
		egrep '^References: ' "${TMPFILE_A}" >>"${TMPFILE_B}"
		egrep -i '^Message-Id: ' "${TMPFILE_A}" |sed 's/^.*: //;' >>"${TMPFILE_B}"
		echo '$
		s/^/ /
		-
		j
		w
		q'| ed -s "${TMPFILE_B}" >/dev/null
fi
#--------------------------------------------------------------------

echo "Organization: ${ORG}" >>"${TMPFILE_B}"
echo "From: ${FROM}" >>"${TMPFILE_B}"
echo "Reply-To: ${REPLY}" >>"${TMPFILE_B}"

echo -n "" >"${TMPFILE_C}"
egrep '^Subject: ' "${TMPFILE_B}" | grep -v 'Re:' | sed -e 's/^Subject/ !!!!!!!! (No Re:)          Subject/;' >> "${TMPFILE_C}"
egrep '^Subject: ' "${TMPFILE_B}" | grep 'References' | sed -e 's/^Subject/ !!!!!!!! (References in Subject:) Subject/;' >> "${TMPFILE_C}"
egrep '^Subject: ' "${TMPFILE_B}" | grep 'Message-ID' | sed -e 's/^Subject/ !!!!!!!! (Message-ID in Subject:) Subject/;' >> "${TMPFILE_C}"
egrep '^References: ' "${TMPFILE_B}" | wc -l |grep -v '1'|sed -e 's/^ *//;s/0/ !!!!!!!! (No References: header found)/;' >>"${TMPFILE_C}"
egrep '^Subject: ' "${TMPFILE_B}" | grep '<.*>' |sed -e 's/^Subject/ ->?????? (<.*> in Subject) Subject/;' >> "${TMPFILE_C}"

echo >>"${TMPFILE_B}"
egrep '^From: '       "${TMPFILE_A}" |sed 's/^From: //;s/$/ wrote:/;' >>"${TMPFILE_B}"

cat "${TMPFILE_C}" "${TMPFILE_B}" 
#clean
rm "${TMPFILE_A}" "${TMPFILE_B}" "${TMPFILE_C}"