#!/bin/bash

### calculate signal ###
function calculate_signal()
    {

        # measurement #
        signal=$1
        [ x$signal == x0 ] && echo -n $NOSIGNAL && return

        # lvl #
        #printf "%.15s" "${SIGNAL:0:(signal/20+1)}${NOSIGNAL}"
        printf "%.15s" "${SIGNAL:0:((signal-10)/20+1)}${NOSIGNAL}"
    }


### config ###
SIGNAL="▂▃▅▆▉"
NOSIGNAL="▁▁▁▁▁"
MODEMNAME=ModemManager
MODEM=$( mmcli -L|grep -iE $MODEMNAME|grep -oE 'Modem/[0-9]{1,3}'|cut -d'/' -f2 )
IFS=$'\n'
INFO=( `mmcli -m $MODEM|grep -E 'operator\ name|signal|access\ tech|state|registration'|cut -d\' -f2 | cut -d, -f1` )
LEVEL=$(calculate_signal ${INFO[3]}) # signal level
ROAM=$(mmcli -m $MODEM|grep -q \'roam && echo -n '✦')

#echo ${INFO[@]}

### display ###

[ -z "$MODEM" ] && echo -n "offline" && exit 1
[ "x${INFO[0]}" == "xdisabled" ]     && echo -n "airplane mode" && exit 2
[ "x${INFO[0]}" == "xfailed" ]       && echo -n "no sim"        && exit 2
[ "x${INFO[5]}" == "xsearching" ]    && echo -n "no service"    && exit 3
[ "x${INFO[5]}" == "xidle" ]         && echo -n "no service"    && exit 3
[ "x${INFO[5]}" == "xunknown" ]      && echo -n "no service"    && exit 3

echo -n "${INFO[4]}${ROAM} " # provider name
echo -n "${INFO[2]} " | tr [:lower:] [:upper:] | sed 's/\-PLUS/+/g' # technology
echo -n "$LEVEL" # signal