#!/bin/zsh
# Extract a page range from a PDF file
# 1 original PDF file path
# 2 first page of desired range
# 3 last page of desired range (optional)
source ~/.local/lib/pdf_tools.sh

typeset -r             numpages=$(pdf_num_pages $1)
typeset -r             digits=$#numpages
typeset -r -Z${digits} first=$2
typeset    -Z${digits} last=${numpages}

if (( $# >= 3 )); then
    (( $3 > ${numpages} )) && echo "The document is only ${numpages} pages long, which is less than $3!" && exit 1
    last=$3
fi
pdf_extract_range "$1" $2 $3 "${1%.pdf}_${first}-${last}.pdf" > /dev/null