#!/bin/sh

# Module showing network traffic. Shows how much data has been received (RX) or
# transmitted (TX) since the previous time this script ran. So if run every
# second, gives network traffic per second.

case "$BLOCK_BUTTON" in
	3) notify-send "🌐 Network traffic module" "🔻: Traffic received
🔺: Traffic transmitted" ;;
	6) "$TERMINAL" -e "$EDITOR" "$0" ;;
esac

logfile="${XDG_CACHE_HOME:-$HOME/.cache}/netlog"
prevdata="$(cat "$logfile")"

rxcurrent="$(($(paste -d '+' /sys/class/net/[ew]*/statistics/rx_bytes)))"
[ -f "$logfile" ] || echo "0 0" > $logfile
txcurrent="$(($(paste -d '+' /sys/class/net/[^lo]*/statistics/tx_bytes)))"

printf "🔻%sKiB 🔺%sKiB\\n" \
	"$(((rxcurrent-${prevdata%% *})/1024))" \
	"$(((txcurrent-${prevdata##* })/1024))"

echo "$rxcurrent $txcurrent" > "$logfile"