#!/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, but use only wlp (wifi) or enp (ethernet)
# TODO probably also add connection over phone
IF=$(ip route | awk '/^default .* (wlp|enp)/ { print $5 ; exit }')

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

# 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 see down, not anything else.
if [ -z "$IF" ] || [[ "$(cat /sys/class/net/$IF/operstate)" = 'down' ]]; then
  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 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
	# Ping nic.cz by ip
	if ping $PINGV 217.31.205.50 >/dev/null 2>&1; then
		# No DNS
		echo \#FFFF00 # color
	else
		# Ping default gateway of this interface
		if ping $PINGV $(ip route show dev $IF | awk '/^default via/ {print $3}') >/dev/null 2>&1; then
			# No internet connection but gateway accessible
			echo \#FF0F00 # color
		else
			# No internet connection
			echo \#FF0000 # color
		fi
	fi
fi