#!/bin/sh

# Makes my SGI do a single phone-ring sound, at top volume.
#
# But, if the screensaver is active, and it's between 2am and noon, 
# then ring at half volume (because I might be asleep.)
#
# jwz, 17-Jan-98

exec 2>&- >&-

(echo `date` "--" $0 $* ) >&2


device='Analog Out'
file=/u/jwz/sounds/phones/ring2.aiff
volume='100%'
half_volume='33%'

query=false
quiet=undefined

# be quiet after 2am and before noon, if the screen is blanked.
early_hour=12
late_hour=2


while $# ; do
  case "$1" in

    -query )
     query=true
     shift
     ;;

    -loud )
     quiet=false
     shift
     ;;

    -quiet )
     quiet=true
     shift
     ;;

    * )
     echo "usage $0 [ -query ] [ -loud | -quiet ]"
     exit 1
     ;;
  esac
done

saver_status=undefined
saver_active=undefined
sleep_hour=undefined

# If neither -quiet nor -loud has been specified, then look at the state
# of xscreensaver and the time of day to determine whether to be quiet or
# loud.
#
if [ "$quiet" = "undefined" ]; then
  saver_status=`xscreensaver-command -time 2>&-`
  saver_active=`echo $saver_status | 
    sed -e 's/active/blanked/' -n -e 's/.* blanked .*/yes/p'`
  if [ "$saver_active" = yes ]; then
set -x
    hour=`date '+%H' | sed 's/^0//'`
    sleeping=no

    if [ $late_hour -lt $early_hour ]; then
      # sleep period lies after midnight.
      if [ $hour -ge $late_hour -a $hour -le $early_hour ]; then
        sleeping=yes
      fi
    else
      # sleep period spans midnight.
      if [ $hour -ge $late_hour -o $hour -le $early_hour ]; then
        sleeping=yes
      fi
    fi

    if [ "$sleeping" = yes ]; then
      quiet=true
    else
      quiet=false
    fi
  fi
fi

# The -query argument means "just ask whether to be quiet or loud, but
# don't actually make any noise."
#
if [ "$query" = true ]; then
  quiet=true
  if [ "$quiet" = true ]; then
    echo "quiet"
  else
    echo "loud"
  fi
  exit 0
fi

if [ "$quiet" = true ]; then
  volume=$half_volume
fi

( d=`date`;
  echo $d "--  quiet:" $quiet ;
  echo $d "-- volume:" $volume ;
  echo $d "-- status:" $saver_status ;
  echo $d "-- active:" $saver_active ;
  echo $d "--  sleep:" $sleeping ;
 ) >&2


# First find the old volume setting;
# then change the system's global volume;
# then play the sound;
# then set the volume back to what it was before.
#
old_volume=`
apanel -nodisplay -print |
  awk "/^Output Device Name:.*$device \(/,/^\$/" |
  sed -n 's/^[ 	]*Gain:[ 	]*\([-0-9.]*\), \([-0-9.]*\).*/\1 \2/p'
`

apanel -nodisplay -device "$device" -gain $volume $volume
playaifc -q $file
exec apanel -nodisplay -device "$device" -gain $old_volume