#!/usr/bin/env bash
# Network state as one line of JSON for the Eww control center. Wired wins over
# Wi-Fi when both are up.
ICON_WIRED=$'\U000F0200'   # nf-md-ethernet
ICON_WIFI=$'\U000F05A9'    # nf-md-wifi
ICON_OFF=$'\U000F0202'     # nf-md-ethernet_off

state() { # available on connected icon label
  printf '{"available":%s,"on":%s,"connected":%s,"icon":"%s","label":"%s"}\n' "$@"
}

command -v nmcli >/dev/null 2>&1 || { state false false false "$ICON_OFF" "Unavailable"; exit 0; }
networking=$(timeout 2 nmcli networking 2>/dev/null) || { state false false false "$ICON_OFF" "Unavailable"; exit 0; }
[ "$networking" = enabled ] || { state true false false "$ICON_OFF" "Off"; exit 0; }

# DEVICE:TYPE:STATE:CONNECTION
devices=$(timeout 2 nmcli -t -f DEVICE,TYPE,STATE,CONNECTION device 2>/dev/null)
wired=$(grep -m1 -E '^[^:]+:ethernet:connected:' <<<"$devices")
wifi=$(grep -m1 -E '^[^:]+:wifi:connected:' <<<"$devices")

if [ -n "$wired" ]; then
  dev=${wired%%:*}
  speed=$(cat "/sys/class/net/$dev/speed" 2>/dev/null)
  label="Wired"
  if [ "${speed:-0}" -ge 1000 ] 2>/dev/null; then
    label+=" · $(awk "BEGIN { print $speed / 1000 }") Gb/s"
  elif [ "${speed:-0}" -gt 0 ] 2>/dev/null; then
    label+=" · $speed Mb/s"
  fi
  state true true true "$ICON_WIRED" "$label"
elif [ -n "$wifi" ]; then
  name=$(cut -d: -f4- <<<"$wifi" | tr -d '"\\')
  state true true true "$ICON_WIFI" "${name:-Wi-Fi}"
else
  state true true false "$ICON_OFF" "Disconnected"
fi