#!/bin/bash

# Dependencies:
#    apt-get install pdfjam tetex-bin pdftk

# Duplex Off:
#    /usr/bin/lpr -P HAAS-110 -o Duplex=None

# Duplex Flip on Long Edge:
#   /usr/bin/lpr -P HAAS-110 -o Duplex=DuplexNoTumble
#   /usr/bin/lpr -P HAAS-110 -o InputSlot=Tray2 -o Duplex=DuplexNoTumble

# Duplex Flip on Short Edge:
#	/usr/bin/lpr -P HAAS-110 -o Duplex=DuplexTumble
#	/usr/bin/lpr -P HAAS-110 -o InputSlot=Tray2 -o Duplex=DuplexTumble

# lpr -P HAAS-110 -o page-ranges=1-2 -o number-up=2 -o media=Letter -o scaling=95 -o Duplex=DuplexTumble *.pdf

# http://wwwcascina.virgo.infn.it/lpoptions.html

if [ ! -e $1 ]; then
	echo "File $1 does not exist."
	exit 1
fi

if [ x$(echo $1 | sed -n '/\.pdf$/ p') == x ]; then
	echo "File $1 is not a valid PDF."
	exit 2
fi

#INFILE=$1
INFILE=`echo $1|sed -e 's/\.pdf$//g'`

if [ x$2 == x ]; then
	OUTFILE="$INFILE-2x1.pdf"
else
	OUTFILE=$2
fi

#TMPFILE="`mktemp`.pdf"
#if [ -e $TMPFILE ]; then
#	echo "Could not allocate temporary file: \"$TMPFILE\"."
#	exit 3
#fi

# if PDF is from JSTOR
if grep -Uq "www.jstor.org/about/terms" $INFILE.pdf; then
	echo "processing JSTOR article"
    # drop first page (i.e., JSTOR)
	DROPFILE="$INFILE-drop.pdf"
	pdftk $INFILE.pdf cat 2-end output $DROPFILE
	
	# the cropfile will be the same name as DROPFILE with -crop appended before
	#   the suffix
	CROPFILE="$INFILE-drop-crop.pdf"
	pdfcrop --margins '-30 -40 -25 -40' --clip $DROPFILE
	
	pdfnup --nup 2x1 --paper letterpaper --outfile $OUTFILE --frame false $CROPFILE
	
	rm $DROPFILE $CROPFILE
else
	# the cropfile will be the same name as INFILE with -crop appended before
	#   the suffix
	TMPFILE="$INFILE-crop.pdf"

	# 1bp = 1/72 inch => .125"=9bp
	# --margins "<left> <top> <right> <bottom>"

	# IEEE (auto-clipping failed due to scan)
	#pdfcrop --margins '-43 -32 -34 -15' --clip $INFILE.pdf
	
	# JSTOR (auto-clipping failed due to scan)
	#pdfcrop --margins '-30 -40 -25 -40' --clip $INFILE.pdf
	
	# Misc (auto-clip, includes JMLR)
	pdfcrop --margins '2 0 2 0' --clip $INFILE.pdf
	
	# Bruce Lindsay scan
	#pdfcrop --margins '-28 -23 -25 -24' --clip $INFILE $TMPFILE  || exit 4
	
	# old
	#pdfcrop --margins '9 5 9 5' --clip $INFILE $TMPFILE 1>/dev/null || exit 4
	
	
	# --trim "<left> <bottom> <right> <top>" in points
	# for example: --trim '1.5in 2in 1.5in 1.5in'

	pdfnup --nup 2x1 --paper letterpaper --outfile $OUTFILE --frame false $TMPFILE
	rm -f $TMPFILE
fi