# ecover.sh - extract cover from epub
# if no cover.jpg found assume largest image is cover
#
# TODO - parse html for first referenced image
# steve wallis may 2020


rm -fr ecover.tmp
mkdir ecover.tmp
cp "$1" ecover.tmp
cd ecover.tmp
unzip "$1"

mkdir ecover_images
find . -name '*.jp*g' -exec cp {} ./ecover_images \;

cd ecover_images

if test -f "*cover*.jp*g"; then
  cp `ls -l *cover*.jp*g|sort  -rnk5 |awk 'NR==1{print $9}'` ../../cover.jpg
else
  cp `ls -l *.jp*g|sort  -rnk5 |awk 'NR==1{print $9}'` ../../cover.jpg
fi