#!/bin/bash

which mutool &> /dev/null || (echo "mutool is not installed" && exit 1)
which convert &> /dev/null || (echo "imagemagick is not installed" && exit 1)
which zip &> /dev/null || (echo "zip is not installed" && exit 1)

if [ "$1" = "" ]
then
	echo "Usage: $0 File.pdf"
	exit
fi

TEMP=`mktemp -d "${TMPDIR:-/tmp}"/pdf2cbz.XXXX`

echo "Extracting images..."
mutool convert -F png -O height=1920 -o "${TEMP}/page-%04d.png" "$1"

echo "Converting"
find "${TEMP}" -type f -name "*.png" -exec echo -n . \; -exec convert -quality 92 -strip "{}" "{}.jpg" \;

echo ""

echo "Zipping..."
zip -q -j "${1%.pdf}.cbz" "${TEMP}"/*.jpg

rm -rf "${TEMP}"