book.sh

#!/bin/sh

# Uses fd - https://github.com/sharkdp/fd
# Uses epub2txt2 - https://github.com/kevinboone/epub2txt2
# Uses pdftotext from poppler

DOC="$HOME/Documents"
export DOC

tmp_pdf_file="$(mktemp)"
export tmp_pdf_file


book="$(fd -p "${DOC}" -e ".pdf" -e ".epub" -0 | xargs -0 sh -c 'for f; do echo "${f#"./Documents/"}"; done' | fzf --sync -e -i --prompt='read book: ' --preview '
	tmpstuff={}
	if [ "${tmpstuff: -4}" = ".pdf" ]
	then
		pdftotext "$HOME/Documents/$tmpstuff" "$tmp_pdf_file"
	else
		epub2txt "$HOME/Documents/$tmpstuff" > "$tmp_pdf_file"
	fi
	bat ${tmp_pdf_file} -p
  ')"
export book

rm "${tmp_pdf_file}"

[ -z "${book}" ]  && exit

command="zathura \"${DOC}/${book}\""

setsid /bin/sh -c "${command}" &
sleep 0.3s