#!/bin/sh
# Shebang line included so editors and shellcheck/shfmt know this contains
# shell code

# In recent (relevant) versions of shellcheck busybox is a valid shell type
# shellcheck shell=busybox

# Helper functions for watchcat

# shellcheck source=/dev/null
. /lib/network/config.sh
. /lib/functions/network.sh

# Accept the historical real-device input while also handling @logical
# interface references used by other OpenWrt configs.
watchcat_resolve_ping_iface() {
	local iface="$1"
	local logical device network

	[ -n "$iface" ] || return 1

	case "$iface" in
	@*)
		logical="${iface#@}"
		[ -n "$logical" ] || return 1
		if network_get_device device "$logical"; then
			printf '%s\n' "$device"
			return 0
		fi
		printf '%s\n' "$iface"
		return 1
		;;
	esac

	network="$(find_config "$iface")"
	if [ -n "$network" ]; then
		printf '%s\n' "$iface"
		return 0
	fi

	if network_get_device device "$iface"; then
		printf '%s\n' "$device"
		return 0
	fi

	printf '%s\n' "$iface"
	return 1
}

watchcat_resolve_restart_iface() {
	local iface="$1"
	local network device

	[ -n "$iface" ] || return 1

	case "$iface" in
	@*)
		network="${iface#@}"
		[ -n "$network" ] || return 1
		if ! network_get_device device "$network"; then
			printf '%s\n' "$network"
			return 1
		fi
		printf '%s\n' "$network"
		return 0
		;;
	esac

	network="$(find_config "$iface")"
	if [ -n "$network" ]; then
		printf '%s\n' "$network"
		return 0
	fi

	if network_get_device device "$iface"; then
		printf '%s\n' "$iface"
		return 0
	fi

	printf '%s\n' "$iface"
	return 1
}