#!/bin/sh

# Copyright 2018 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Set the Wake on LAN behavior.

FLAGS_HELP="Usage:
  $(basename "$0")
  $(basename "$0") [true | false]

Enable or disable Wake on LAN for Ethernet devices.  This command takes
effect after re-connecting to Ethernet and is not persistent across system
restarts."

. /usr/share/misc/shflags

FLIMFLAM=org.chromium.flimflam
IMANAGER="${FLIMFLAM}.Manager"
PROPERTY_NAME=WakeOnLanEnabled
PROPERTY_DESC="Wake on LAN"

usage() {
  echo "Invalid invocation: $*"
  echo
  flags_help
  exit 1
}

dbus () {
  local obj="$1"
  local meth="$2"
  shift 2

  dbus-send --system --print-reply --fixed --dest="${FLIMFLAM}" "${obj}" "${meth}" "$@"
}

get_manager_property () {
  dbus / "${IMANAGER}.GetProperties" | sed -n "/$1/s/.* //p"
}

display_value () {
  local value

  value="$(get_manager_property "${PROPERTY_NAME}")"
  if [ -n "${value}" ] ; then
    echo "Current ${PROPERTY_DESC} setting: ${value}"
    exit 0
  fi

  echo "This connection manager instance does not support ${PROPERTY_DESC}"
  exit 0
}

FLAGS "$@" || exit 1
eval set -- "${FLAGS_ARGV}"

if [ $# -lt 1 ]; then
    display_value
fi

set_value="$1"

if [ "${set_value}" != "false" ] && [ "${set_value}" != "true" ] ; then
    usage "Argument must be 'true' or 'false'"
fi

dbus / "${IMANAGER}.SetProperty" string:"${PROPERTY_NAME}" "variant:boolean:${set_value}"