#!/bin/bash

#You can change the resolution or the scanmode adding commandline arguments
#"buchscan resolution mode" is the syntax

#Defining standard options
model=epson			#your printer model
stdresolution=240		#your default resolution
stdmode=gray			#your default scanmode
stdauthor=$USER			#default author of the pdf file
stdsub=""			#default subject for the pdf file
stdkeywords=""			#default keywords for the pdf file
stdtitle=""			#default title for the pdf file

#Change directory to store tempfiles and outputfiles 
cd /tmp

help()
{
echo "known options"
echo "-h  This helptext"
echo "-r  set resolution"
echo "-m  set mode"
echo "-a  set author"
echo "-s  set subject"
echo "-k  set keywords"
echo "-t  set title"
exit 0
}

findscanner()
{
#Find the scanner via scanimage -L and cut out the device name
scanimage -L | sed -e "s/.*\`\([^']\+\)'.*/\1/" | grep $model
}

files()
{
ls /tmp/out*.tif
}

while [ -n "$1" ]; do
case $1 in
    -h) help;shift 1;;
    -r) resolution=$2;shift 2;;
    -m) mode=$2;shift 2;; 
    -a) author=$2;shift 2;; 
    -s) sub=$2;shift 2;;
    -k) keywords=$2;shift 2;;
    -t) title=$2;shift 2;;
    -*) echo "error: no such option $1.";exit 1;;
    *)  break;;
esac
done

if [ -z "$resolution" ]
then
resolution=$stdresolution
fi
if [ -z "$mode" ]
then
mode=$stdmode
fi
if [ -z "$author" ]
then
author=$stdauthor
fi
if [ -z "$sub" ]
then
sub=$stdsub
fi
if [ -z "$keywords" ]
then
keywords=$stdkeywords
fi
if [ -z "$title" ]
then
title=$stdtitle
fi


#Finding Scanner
echo "Finding Scanner..."
scanner=`findscanner`
if [ -z "$scanner" ]
then
echo "No Scanner found"
exit 0
else
# Scan Images
scanimage --device=$scanner --batch=out%d.tif --batch-start=11 --wait-for-button=yes --resolution=$resolution --format=tiff --mode $mode
fi

#looking for created files

file=`files`
#if [ -z "$file" ]
#then
#echo "No data found"
#exit 0
#fi

#Create one big TIFF
echo "Combining TIFF images..."
tiffcp -c lzw out*.tif document.tif

# Create PDF
echo "Creating PDF document..."
tiff2pdf -z document.tif -o document.pdf -a "$author" -t "$title" -s "$sub" -k "$keywords"

#echo "Optimizing PDF..."
pdfopt document.pdf document_opt.pdf

#echo "Cleaning up..."
rm out*.tif
rm document.tif
rm document.pdf
cp document_opt.pdf $HOME
rm document_opt.pdf