#!/bin/bash
# Copyright (C) 2008-2018 Richard Kimberly Heck

# 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

# Updates etc should be available from:
# http://frege.brown.edu/heck/linux/programs/bash.php

# Change log

# Version 0.1: First public release

PROG=`basename $0`;
DEVICE="hp5590:libusb:001:006";

function printUsage {
cat <<EOF
USAGE: $PROG [-dpq] [-D resolution] PREFIX
$PROG scans a set of images from the ADF. The PREFIX is the
filename prefix to use for the scanned pages. So you get: 
PREFIX01.tiff, etc.
-a: A4 pages (default is letter)
-c: Color (default is lineart)
-d: DEBUG: Just say what we'd do
-D: Device (default is $DEVICE)
-e: Even pages
-R: Set resolution of scan (default is 300)
-g: Grayscale (default is lineart)
-l: Legal size pages (default is letter)
-o: Odd pages.
-p: Try to use pnm (broken on some systems)
-q: Be quiet.
-s: Starting page (defaults to 1, 2 if doing even pages)

Prerequisite:
- We use scanimage, from SANE, to scan.
EOF
}

#DEVLIST=$(scanimage --help | tail -n 1);
#echo $DEVLIST; exit 1;

PAGENUMS="";
BATCH="";
DEBUG="";
REZ="300";
EXT="tiff";
QUIET="";
MODE="Lineart";
PAPLEN=279

while getopts ":acdD:eglopR:qs:" opt; do
  case $opt in
    a )   PAPLEN=297;;
    c )   MODE="Color";;
    d )   DEBUG="echo ";;
    D )   DEVICE="$OPTARG";;
    e )   if [ -z "$PAGENUMS" ]; then PAGENUMS="--batch-start=2"; fi
          BATCH="--batch-double";;
    g )   MODE="Gray";;
    l )   PAPLEN=355;;
    o )   if [ -z "$PAGENUMS" ]; then PAGENUMS="--batch-start=1"; fi
          BATCH="--batch-double";;
    p )   EXT="pnm";;
    q )   QUIET=">/dev/null";;
    R )   REZ=$OPTARG;;
    s )   PAGENUMS="--batch-start=$OPTARG";;
    \? )  printUsage; exit 1;;
  esac
done

shift $(($OPTIND - 1));

CVT=$(which scanimage 2>/dev/null);
if [ -z "$CVT" ]; then 
  echo "This script uses the scanimage utility from the sane-backends package. It does not appear to be in your path.";
  exit 1;
fi

if [ -n "$1" ]; then 
  FILENAME="$1"; 
else
  FILENAME="pages";
fi

TDIR="$FILENAME-$$";
TMPDIR="/tmp/$TDIR";
if [ -e "$TMPDIR" ]; then
  echo $TMPDIR exists!;
  exit 1;
fi

$DEBUG scanimage -d $DEVICE --mode $MODE --format=$EXT --batch=$FILENAME%d.$EXT $PAGENUMS $BATCH -p -y $PAPLEN --source ADF --resolution $REZ $QUIET;

if [ -n "$DEBUG" ]; then exit 0; fi
for i in $FILENAME?.$EXT; do
  if [ -e "$i" ]; then 
    mv $i ${FILENAME}00${i#$FILENAME};
  fi
done
for i in $FILENAME??.$EXT; do
  if [ -e "$i" ]; then 
    mv $i ${FILENAME}0${i#$FILENAME};
  fi
done
exit 0;