#! /bin/sh
cd /tmp/noise
case "$1" in
  (--help) : ;;
  ('')
    . $NOISE_pid/environment
    ping_timestamp=${ping_timestamp-0}
    ping_challenger=${ping_challenger-0}
    if test $ping_challenger = 0 ; then
      echo There is no ping challange running
    else
      timestamp=`date +%s%N`
      echo /pong $NOISE_pid $timestamp >$ping_challenger/linefeed
      ## reset ping TODO /unset
      echo /set -q ping_timestamp 0 >$NOISE_pid/linefeed
      echo /set -q ping_challenger 0 >$NOISE_pid/linefeed
    fi
  ;;
  (*)
    . $1/environment
    # XXX is attendee the right counterpart to 'challenger'?
    attendee_nick=$chat_nick
    . $NOISE_pid/environment
    time=`echo "scale=3; ($2 - $ping_timestamp)/10^9" | bc`
    echo "PONG! $attendee_nick ${time}s"
esac