#!/bin/sh

DAEMON=davfs2
DAEMON_LONG_NAME=DavFS2
DAEMON_CHECK="mount.davfs"
. /etc/init.d/modlibrc

local CONF_DIR=/var/$DAEMON

config() {
	# cache-directory
	mkdir $DAVFS2_TMPPATH 2>/dev/null
	mkdir -p /var/cache
	rm /var/cache/davfs2 2>/dev/null
	ln -s $DAVFS2_TMPPATH /var/cache/davfs2
	if [ ! -d "$DAVFS2_TMPPATH" ]; then
		echo "cache-directory not available, failed"
		exit 1
	fi

	# to hide error messages
	touch $CONF_DIR/davfs2.conf $CONF_DIR/secrets
	chmod 600 $CONF_DIR/secrets

	# AVM-account
	if which webdavcfginfo >/dev/null; then
		[ "$(webdavcfginfo -p enabled)" == "1" ] && DAVFS2_ENABLED0="yes"
		DAVFS2_HOST0="$(webdavcfginfo -p host_url)"
		DAVFS2_USER0="$(webdavcfginfo -p username)"
		DAVFS2_PASS0="$(webdavcfginfo -p password)"
		DAVFS2_MOUNTPOINT0="/var/media/ftp/$(webdavcfginfo -p mountpoint)"
	fi

	for i in 0 1 2 3; do
		#for compatibility reason only, may be removed later
		[ -e /tmp/flash/davfs_servercrt${i}.pem ] && mv /tmp/flash/davfs_servercrt${i}.pem /tmp/flash/davfs2/servercrt${i}.pem
		[ -e /tmp/flash/webdav_secrets_${i} ] && mv /tmp/flash/webdav_secrets_${i} /tmp/flash/davfs2/davfs2_secrets_${i}
		[ -e /tmp/flash/davfs2/davfs2_secrets_${i} ] && mv /tmp/flash/davfs2/davfs2_secrets_${i} /tmp/flash/davfs2/davfs2_secrets_${i}_conf
		modlib_config davfs2_secrets_${i} $CONF_DIR/secrets_${i}
	done

	modprobe fuse 2>/dev/null
}

start() {
	echo -n "Starting $DAEMON_LONG_NAME ... "
	config
	[ -r /etc/options.cfg ] && . /etc/options.cfg

	# abort on https if SSL is not enabled on build
	if [ "$FREETZ_PACKAGE_DAVFS2_WITH_SSL" != "y" ]; then
		for i in 0 1 2 3; do
			[ "$(eval "echo \$DAVFS2_ENABLED${i}")" != "yes" ] && continue
			if eval "echo \$DAVFS2_HOST${i}" | grep -q -i "^https://"; then
				echo "https is not allowed due to missing SSL, failed."
				exit 1
			fi
		done
	fi

	local retval=0
	for i in 0 1 2 3; do
		[ "$(eval "echo \$DAVFS2_ENABLED${i}")" != "yes" ] && continue
		local cert="$(eval "echo \$DAVFS2_SERVERCERT${i}")"
		local uselocks="$(eval "echo \$DAVFS2_USELOCKS${i}")"
		local ifmatchbug="$(eval "echo \$DAVFS2_IFMATCHBUG${i}")"
		local point="$(eval "echo \$DAVFS2_MOUNTPOINT${i}")"
		local host="$(eval "echo \$DAVFS2_HOST${i}")"
		local cfile="$CONF_DIR/davfs2_${i}.conf"
		echo "secrets $CONF_DIR/secrets_${i}" > $cfile
		if [ "$cert" == "yes" -a "$FREETZ_PACKAGE_DAVFS2_WITH_SSL" == "y" ]; then
			echo "servercert /var/tmp/flash/davfs2/servercrt${i}.pem" >> $cfile
		fi
		[ "$uselocks" == "yes" ] && echo "use_locks 0" >> $cfile
		[ "$ifmatchbug" == "yes" ] && echo "if_match_bug 1" >> $cfile
		echo "ask_auth 0" >> $cfile
		chmod 600 $CONF_DIR/secrets_${i}
		mkdir $point 2>/dev/null
		mount -t davfs $host $point -o conf=$cfile,uid=ftpuser
		local retpoint=$?
		if [ "$retpoint" -ne 0 ]; then
			retval=$retpoint
			rmdir $point 2>/dev/null
		fi
	done;

	if [ "$retval" -eq 0 ]; then
		echo 'done.'
	else
		echo 'failed.'
		exit $retval
	fi
}

active_mounts() {
	mount | grep ^http | cut -d" " -f3
}

stop() {
	mpoints="$(active_mounts)"
	count=9
	while [ -n "$(active_mounts)" ]; do
		umount $(active_mounts) 2>/dev/null
		sleep 1
		let count--
		[ "$count" -le 0 ] && break
	done
	[ "$count" -le 0 ] && umount -l $(active_mounts) 2>/dev/null
	[ -n "$mpoints" ] && rmdir $mpoints
	killall -9 mount.davfs 2>/dev/null
	rm -rf /var/run/mount.davfs/
}

reload() {
	killall -HUP $DAEMON 2>/dev/null
}

case $1 in
	""|load)
		mkdir -p $CONF_DIR
		mkdir -p /tmp/flash/$DAEMON
		modlib_addgroup $DAEMON
		modlib_adduser $DAEMON -s /bin/false -D -S -H -G $DAEMON -g $DAEMON_LONG_NAME

		modreg cgi $DAEMON $DAEMON_LONG_NAME
		modreg daemon $DAEMON

		for i in 0 1 2 3; do
			modreg file $DAEMON servercrt$i "Server Zertifikat $i" 0 "davfs2_servercrt$i"
		done

		modlib_start $DAVFS2_ENABLED
		;;
	unload)
		modunreg file davfs2
		modunreg daemon $DAEMON
		modunreg cgi davfs2
		modlib_stop
		;;
	start)
		modlib_start
		;;
	stop)
		modlib_stop
		;;
	restart)
		modlib_restart
		;;
	reload)
		modlib_reload
		;;
	status)
		modlib_status
		;;
	*)
		echo "Usage: $0 [load|unload|start|stop|restart|reload|status]" 1>&2
		exit 1
		;;
esac

exit 0