#!/bin/bash

########################################################################
#
# Program:	booklet-print
#
# Author:	Conor Daly <conor.daly@met.ie>
# Version:	0.1.1
# Date:		03 Oct 2002
#
# License:	GPL
#
# Purpose:
# 		formats a document for printing in A5 booklet form.
# 
# 		uses the Xerox colour printer 
# 
# 		takes input from stdin or as a file
#
# 		we'll do nothing fancy here, just take the file and stuff it 
# 		through psbook and mpage and hand it to the printer
#
# Bugs:		Completely ignores any of the usual print accounting stuff
#		that comes in from lpr.
#
#########################################################################

# Set the print queue to use.  It must be capable of duplex printing or
# you won't get sensible output
PRINTER=fanfold
PRINTER_COMMAND="lpr -P${PRINTER}"

# For debug info, uncomment the "LOGFILE=" line below
# Note: debug will disable actual printout...
LOGFILE=/var/log/cups/booklet.log

# Start the print run...
[ $LOGFILE ] && echo >> $LOGFILE
[ $LOGFILE ] && echo "________________________________________________" >> $LOGFILE
[ $LOGFILE ] && echo -n "Starting print run at: " >> $LOGFILE
[ $LOGFILE ] && date >> $LOGFILE
[ $LOGFILE ] && echo $0 $* >> $LOGFILE

# Get the name of this filter.  If it's booklet-right or booklet-left
# then print for a non-duplex printer.  Gotta print in two passes though
FILTERNAME=$0
MPAGE_SWITCH=""
if [ `basename $FILTERNAME` == "booklet-left" ]; then
  MPAGE_SWITCH="-j 2%2"
  [ $LOGFILE ] && echo "left mode" >> $LOGFILE
fi
if [ `basename $FILTERNAME` == "booklet-right" ]; then
# If your printer outputs reversed, you may need to remove the
# '-r' from MPAGE_SWITCH below
  MPAGE_SWITCH="-r -j 1%2"
  [ $LOGFILE ] && echo "right mode" >> $LOGFILE
fi

# pipe or console?
if [ -t 0 ]; then
  # We're in a console here
  [ $LOGFILE ] && echo "console">> $LOGFILE
  FILE=$1
  PIPE=
else
  # Here, we're in a pipe
  # We need a temporary file here so something else can carry on
  [ $LOGFILE ] && echo "pipe">> $LOGFILE
  FILE=/tmp/booklet-print$$.tmp
  cat > $FILE
  PIPE=1
fi

# Find out how many pages to print
NUM=`mpage -1 $FILE | grep %%Pages: | tail -1 | cut -f2 -d" "`
[ $LOGFILE ] && echo "Processing ${NUM} pages from ${FILE}..." >> $LOGFILE

# We need an exact multiple of 4 for psbook
ODD=`expr $NUM % 4`
if [ $ODD -ne 0 ]; then
  [ $LOGFILE ] && echo "${ODD} odd pages, adjusting..." >> $LOGFILE
  NUM=`expr $NUM + 4 - $NUM % 4`
  [ $LOGFILE ] && echo "Processing ${NUM} pages from ${FILE}..." >> $LOGFILE
fi

# Just see where psbook and mpage are...
[ $LOGFILE ] && which psbook >> $LOGFILE
[ $LOGFILE ] && which mpage >> $LOGFILE

# Now, push $FILE through psbook and mpage and on to the printer
[ $LOGFILE ] && psbook -s${NUM} $FILE | mpage -2 $MPAGE_SWITCH -bA4 -m35t-40r-00l-20b -M-8 -t -T > book.ps
[ $LOGFILE ] || psbook -s${NUM} $FILE | mpage -2 -$MPAGE_SWITCH bA4 -m00t00r00l00b -M-8 -t -T | ${PRINTER_COMMAND}

# If the file came down a pipe, delete the temporary file
[ $LOGFILE ] && [ "X${PIPE}" == "X1" ] && echo "Removing $FILE" >> $LOGFILE
if [ ! $LOGFILE ]; then
  [ $PIPE ] && [ $PIPE -eq 1 ] && rm -f $FILE
fi