#! /bin/bash
#
# Script for displaying local network address in polybar, tint2, conky etc.
#
#    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 <https://www.gnu.org/licenses/>.
#
# @linux-aarhus - root.nix.dk
#
# for icons install the package ttf-font-icons from the Manjaro Linux repo
#

ttf_icons(){
    # set icons if font is available
    if [ -f '/usr/share/fonts/TTF/icons.ttf' ]; then
      wlan=''
      lan=''
      offline=''
    fi
}

lanip() {
    # parse output from ip a show $nic
    echo $(ip a show $1 | grep 'inet ' | head -n 4 | awk '{print $2}' | cut -d'/' -f1)
}

ttf_icons
# find active interface
nic=$(ip a | grep ' state UP' | cut -d' ' -f2 | cut -d':' -f1)
if [[ ${nic} != "" ]]; then
    # print IP address
    if [[ ${nic} == e* ]]; then
        echo ${lan} $(lanip ${nic})
    else
        echo ${wlan} $(lanip ${nic})
    fi
else
    # print offline
    echo ${offline} n/a
fi