#!/bin/sh

# Usage: vpn-select <path-to-hood-file>
# To add a new protocol, put a file with three functions to /usr/lib/vpn-select.d/ .
# The file must start with protocol=name. It is most important to use the same name here and in hoodfile.
# The old config can be cleared in function ${protocol}_clear(). It is called first once per installed protocol.
# The function ${protocol}_addpeer() is called for every selected peer in hoodfile.
# The function ${protocol}_start_stop() is called at the end once per installed protocol.

. /usr/share/libubox/jshn.sh

hoodfile="$1"

# source functions
for file in /usr/lib/vpn-select.d/*; do
	[ -f $file ] && . "$file"
	supported_protocols="$supported_protocols $protocol"
done

# clear old config
for protocol in $supported_protocols; do
	"${protocol}_clear"
done

# configure vpn

if [ "$0" != "/usr/sbin/vpn-stop" ] ; then
	if [ -n "$hoodfile" ] && [ -s "$hoodfile" ] ; then
		json_load "$(cat "$hoodfile")"
		json_select hood
		json_get_var id id
		json_select ".."
		json_select vpn
		json_get_keys vpn_keys
		for key in $vpn_keys; do
			json_select $key
			json_get_var protocol protocol
			"${protocol}_addpeer"
			json_select ".." # back to vpn
		done
	fi
fi

# start/restart/stop vpnservices
for protocol in $supported_protocols; do
	"${protocol}_start_stop"
done