#!/bin/bash
# 
# Copyright (C) 2002 Laird Breyer
#  
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
# 
# Author:   Laird Breyer <laird@lbreyer.com>
#
# IMPLEMENTATION NOTES
#
# This script follows the mailcross testsuite interface
# requirements. Type man mailcross for details.
#
# The script accepts one of more commands on the command line,
# and may read STDIN and write STDOUT as follows:
#
# If $1 == "filter":
# In this case, a single email is expected on STDIN,
# and a list of category filenames is expected in $2, $3, etc.
# The script writes the category name corresponding to the 
# input email on STDOUT.
#
# If $1 == "learn":
# In this case, a standard mbox stream is expected on STDIN,
# while a suitable category file name is expected in $2. No output
# is written to STDOUT.
#
# If $1 == "clean":
# In this case, a directory is expected in $2, which is examined
# for old database information. If any old databases are found, they
# are purged or reset. No output is written to STDOUT.
#
# If $1 == "describe":
# In this case, STDIN and the command line are ignored. A single
# line is written on STDOUT, describing the filter functionality.
#
# If $1 == "bootstrap":
# In this case, the current script is copied to the directory $2,
# provided the classifier we're wrapping exists on the system.
#

CRM="crm"
MUTILATE=`which normalizemime`

case "$1" in
    filter)
	shift
	ALLCATS=`for f in $@; do echo -n "$f.css " ; done`
	$MUTILATE | $CRM "-{
isolate (:lcr:)
alter (:lcr:) /[[:graph:]][-.,:[:alnum:]]*[[:graph:]]?/
isolate (:stats:)
{
        match (:data:) /.*/
        classify ($ALLCATS) ( :stats: ) [:data:] /:*:lcr:/ 
	match <nomultiline> (:x: :y: :z:) [:stats:] /\\\((.*\/)*(.*)\\.css\\\)/
	output /:*:z:/
}
}"
	;;
    learn)
	shift
	CATEGORY=`basename $1`
	DBPATH=${1/$CATEGORY/}
	formail -s $MUTILATE | $CRM "-{
isolate (:lcr:)
alter (:lcr:) /[[:graph:]][-.,:[:alnum:]]*[[:graph:]]?/
{
        match (:data:) /.*/
        learn <microgroom> (${DBPATH}${CATEGORY}.css) [:data:] /:*:lcr:/  
        exit /0/
}
}"
	;;
    clean)
	shift
	find "$1" -name "*.css" -exec rm {} \;
	find "$1" -name "*.toe" -exec rm -f {} \;
	find "$1" -name "*.foot" -exec rm -f {} \;
	find "$1" -name "*.tmp" -exec rm -f {} \;
	;;
    describe)
	VER="(unavailable?)"
	if [ -n "`which $CRM`" ] ; then
	    VER=`$CRM -v 2>&1 | head -1 | sed 's/^.*version //'`
	fi
	echo "crm114 $VER with Jaakko Hyvatti's normalizemime"
	;;
    bootstrap)
	if [ -d "$2" ] ; then
            if [ -n "`which $CRM`" -a -n "$MUTILATE" ] ; then
		echo "selecting $0"
		cp "$0" "$2"
	    else
		echo "crm114 and/or normalizemime appear to be missing"
            fi
	else
	    echo "bad target directory $2"
	fi
	;;

    toe)
	ME="$0"
	shift
	TRUECAT="$1"
	shift
	CATS=`for f in "$@"; do echo -n "-c $f " ; done`
	cat > "$TEMPDIR/mailtoe.tmp"
	VERDICT=`cat $TEMPDIR/mailtoe.tmp | $ME filter "$@"`
	if [ "x$VERDICT" != "x`basename $TRUECAT`" ] ; then
	    cat "$TEMPDIR/mailtoe.tmp" >> $TRUECAT.toe
	    cat $TRUECAT.toe | $ME learn $TRUECAT
	fi
	echo -ne "$VERDICT"
	;;

    foot)
	ME="$0"
	shift
	TRUECAT="$1"
	shift
	CATS=`for f in "$@"; do echo -n "-c $f " ; done`
	cat > "$TEMPDIR/mailfoot.tmp"
	VERDICT=`cat "$TEMPDIR/mailfoot.tmp" | $ME filter "$@"`
	cat "$TEMPDIR/mailfoot.tmp" >> "$TRUECAT.foot"
	cat "$TRUECAT.foot" | $ME learn $TRUECAT
	echo -ne "$VERDICT"
	;;

esac