#!/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 $BLOCK_BUTTON in
	1) setsid -f "$TERMINAL" -e bmon ;;
	3) notify-send "󰓅  Network traffic module" "󰄼 : Traffic received
󰄿 : Traffic transmitted" ;;
	6) setsid -f "$TERMINAL" -e "$EDITOR" "$0" ;;
esac

update() {
    sum=0
    for arg; do
        read -r i < "$arg"
        sum=$(( sum + i ))
    done
    cache=/tmp/${1##*/}
    [ -f "$cache" ] && read -r old < "$cache" || old=0
    printf %d\\n "$sum" > "$cache"
    printf %d\\n $(( sum - old ))
}

rx=$(update /sys/class/net/[ew]*/statistics/rx_bytes)
tx=$(update /sys/class/net/[ew]*/statistics/tx_bytes)

if [ ! -e ~/.cache/bar_color ]; then
  printf "󰜮  %4sB 󰜷  %4sB\\n" $(numfmt --to=iec $rx $tx)
  exit 0
fi
printf "^C2^󰜮  ^d^%4sB ^C3^󰜷  ^d^%4sB\\n" $(numfmt --to=iec $rx $tx)