eBook Open Dir Finder 2

find_ebooks.sh

#!/usr/bin/env bash
 
declare -i CHECK_DIGIT
declare -i B
 
if [ ! -d "$2" ] ; then mkdir "$2" ; fi
 
#If the directory I passed doesn't exist, create it
 
find  "$1" -iname '*' -type f -print0 | xargs -L 1 -0 | while read F ; do
 
unset ISBN
 
if [ -s "$F" ] ; then
 
#If the file has non zero size then..
 
if (file -b "$F" | grep -w ^PDF >/dev/null) ; then
 
#The -b flag makes the file utility not print the filename, this is important since if printed, the filename may contain a match for grep which is not what I want, I want to test the file type.
 
#If the file is a PDF then..
 
P=`pdfinfo "$F" 2>/dev/null 3>/dev/null 99>/dev/null | awk '/^Pages/{if ( $2 > 100 ) print $2 }'`
 
#If the PDF has more than 100 pages, then set the number of pages to the variable P
 
if [ $P ] ; then
 
A=0
 
while  [ ! $ISBN ] ; do
 
case "$A" in
 
        0)                              A=5                     ;;
        5)                              A=6                     ;;
        6)                              A=4                     ;;
        4)                              A=3                     ;;
        3)                              A=2                     ;;
        2)                              A=1                     ;;
        1)                              A=7                     ;;
        7)                              A=8                     ;;
        8)                              A=9                     ;;
        9)                              A=10            ;;
        10)                             A=12            ;;
        12)                             A=14            ;;
        14)                             A=11            ;;
        11)                     A=13            ;;
        13)                             A=$((P-5))      ;;
        `expr $P - 5`)  A=$((P-4))      ;;
        `expr $P - 4`)  A=$((P-3))      ;;
        `expr $P - 3`)  A=$((P-2))      ;;
        `expr $P - 2`)  A=$((P-1))      ;;
        `expr $P - 1`)  A=$P            ;;
        $P)                             ISBN=0          ;;
       
#to make case end I give the variable ISBN a value [of 0] even though it didn't find an ISBN
       
esac
 
# This sets A to the most likely page for grep to match the correct ISBN
 
pdftotext -enc ASCII7 "$F" -f $A -l $A 2>/dev/null 3>/dev/null 99>/dev/null - | grep -E -o '\<978[^A-Za-z:)(,/\\.]{9,13}[[:digit:]]\>' | sed -r 's/[^0-9]//g' | uniq -s 3 | while read DOG ; do
 
A1=`expr ${DOG:3:1} \* 3`
A2=${DOG:4:1}
A3=`expr ${DOG:5:1} \* 3`
A4=${DOG:6:1}
A5=`expr ${DOG:7:1} \* 3`
A6=${DOG:8:1}
A7=`expr ${DOG:9:1} \* 3`
A8=${DOG:10:1}
A9=`expr ${DOG:11:1} \* 3`
A10=`expr 10 - ${DOG:12:1}`
A11=${DOG:12:1}
 
CHECK_DIGIT=(38+A1+A2+A3+A4+A5+A6+A7+A8+A9)%10
 
#This calculates the check digit
 
if [[ $CHECK_DIGIT -eq $A10 ]] ; then echo $DOG
 
fi
 
if [[ $A11 -eq 0 && $CHECK_DIGIT -eq 0 ]] ; then echo $DOG
 
fi
 
done > 1.txt
 
# Why am I sending the output to a text file? that's a long story, piping a while loop creates a subshell..so the variables set in it unset at it's end, I needed a variable (B) to increment each time an ISBN is found...
 
B=`wc -l <1.txt`
 
if [[ $B -eq 1 ]]
 
then ISBN=`awk 'NR==1 {print $1}'<1.txt`
 
if [ ! -f "$2"/$ISBN.pdf ]; then
   
    mv "$F" "$2"/$ISBN.pdf
   
else
    num=2
    while [ -f "$2"/$ISBN-$num.pdf ]; do
        (( num++ ))
       
    done
   
    mv "$F" "$2"/$ISBN-$num.pdf
 
fi
 
 
elif [[ $B -gt 1 ]] ; then
 
C=`pdftotext -enc ASCII7 "$F" -f $A -l $A 2>/dev/null 3>/dev/null 99>/dev/null - | grep -o -w -E "(c)|©|Catalog[u]?ing[- ]in[- ]Publication[- ]Data|Congress|CIP|transmitted|[Cc]opyright|acid[- ]free"`
 
if [ "$C" ]
 
then ISBN=`awk 'NR==1 {print $1}'<1.txt`
 
if [ ! -f "$2"/$ISBN.pdf ]; then
   
    mv "$F" "$2"/$ISBN.pdf
   
else
    num=2
    while [ -f "$2"/$ISBN-$num.pdf ]; do
        (( num++ ))
       
    done
   
    mv "$F" "$2"/$ISBN-$num.pdf
 
 
unset B
unset CHECK_DIGIT
 
fi
fi
fi
 
done
fi
fi
fi
done
exit 0