#!/bin/bash
# Copyright (C) 2014 Julien Bonjean <julien@bonjean.info>
# Copyright (C) 2014 Alexander Keller <github@nycroth.com>

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

#------------------------------------------------------------------------

# Locate current default interface
D_IF=$(ip route | awk '/^default/ { print $5 ; exit }')
# Filter if it's one of chosen ones
if [[ -n $BLOCK_INSTANCE ]]; then
	for INT in $BLOCK_INSTANCE; do
		if [ "$INT" = "$D_IF" ]; then
			IF="$D_IF"
			break
		fi
	done
else
	IF="$D_IF"
fi

#------------------------------------------------------------------------

# As per #36 -- It is transparent: e.g. if the machine has no battery or wireless
# connection (think desktop), the corresponding block should not be displayed.
[[ ! -d /sys/class/net/${IF} ]] && exit
# Note this passes if IF is empty!

#------------------------------------------------------------------------

# If no IF is selected then we want se down not anything else.
if [ -z "$IF" ] || [[ "$(cat /sys/class/net/$IF/operstate)" = 'down' ]]; then
  echo down # full text
  echo down # short text
  echo \#FF0000 # color
  exit
fi

case $1 in
  -4)
    AF=inet ;;
  -6)
    AF=inet6 ;;
  *)
    AF=inet6? ;;
esac

# Use the first global scope address
IPADDR=$(ip addr show $IF | perl -n -e "/$AF ([^\/]+).* scope global/ && print \$1 and exit")

case $BLOCK_BUTTON in
  3) echo -n "$IPADDR" | xclip -q -se c ;;
esac

#------------------------------------------------------------------------

echo "$IPADDR" # full text
echo "$IPADDR" # short text

#------------------------------------------------------------------------
# Use fast ping to check if we have connection

# We ping only once and wait for one second
PINGV="-c 1 -w 1"
# Ping nic.cz
if ping $PINGV nic.cz >/dev/null 2>&1; then
	echo \#00FF00 # color
else
	if ping $PINGV 217.31.205.50 >/dev/null 2>&1; then
		# No DNS
		echo \#FFFF00 # color
	else
		# No internet connection
		echo \#FF0000 # color
	fi
fi