run

#!/bin/sh
# A discord "bot" using dcfs

read -r TOKEN  <data/.token
read -r SERVER <data/.server
read -r CHAN   <data/.chan
read -r MNT    <data/.mnt
read -r OWNER  <data/.owner

BPREFIX='-'

# Previous csv string
p=''

die() {
	echo dying, bye...
	fusermount -uz "${MNT}"
	read pid <data/pid
	kill ${pid}
	rm -f data/pid
	exit 0
}

init() {
	trap die INT

	_TAGDB="data/tagdb"
	_OWNDB="data/tagowndb"
	for i in ${MNT} ${_TAGDB} ${_OWNDB}; do
		[ -d ${i} ] || mkdir -p ${i}
	done

	TOKEN="${TOKEN}" dcfs "${MNT}" \
		'{{.Author.Username}}' '{{.Content}}' '{{time .Timestamp "3:04PM"}}' \
			>data/dcfs.log 2>data/dcfs.log &

	echo ${!} >data/pid

	for i in lib/*.sh; do
		. "${i}"
	done	
}

type dcfs >/dev/null || {
	echo error: dcfs not found
	exit 1
}

init

while [ ! -f "${MNT}/${SERVER}/${CHAN}" ]; do
	sleep 0.1
done

log starting to read ${CHAN}

# tail -f in a fuse fs doesn't really work in a proper way. When the
# file changes, tail -f -n1 doesn't output the last line. But when the
# file does change, GNU tail outputs a single line to stderr which
# could be captured to listen listen for commands but it is not
# consistent. I cannot use other inotify-based tools either.
while :; do
	l="$(tail -n1 "${MNT}/${SERVER}/${CHAN}")"
	[ "${l}" = "${p}" ] && continue
	msg_cmd "${l}" || {
		p="${l}"
		rm -fr ${MSG}
		continue
	}
	cmd=${content#?}
	case ${cmd%% *} in
	tags)
		tags_parse "${content}" "${author}"
		;;
	choose)
		choose "${content#${BPREFIX}choose }"
		;;
	shitpost)
		shitpost "${content#${BPREFIX}shitpost }"
		;;
	test)
		printf '%s\n' test
		;;
	help)
		printf '%s\n' no
		;;
	esac >${MNT}/${SERVER}/${CHAN}
	rm -fr ${MSG}
	p="${l}"
	sleep 1
done