#!/bin/sh

if [ $# -eq 0 ]; then
  echo "usage: sumpoints <file> [<max.points>]"
  echo "<file> must have the following structure: name \":\" points for exercises, separated by commas."
  exit 1
fi


# names:
sed -e 's/:.*$/: /' $1 > ~/misc/pipe1&

# total points:
sed -e 's/^.*:[[:space:]]*//' -e 'y/,-/+0/' $1 | bc -l > ~/misc/pipe2&

# percentage of maximum:
if [ -n "$2" ]; then
  ( echo "scale=2"; sed -e 's/^.*:[[:space:]]*/(/' -e 'y/,-/+0/' -e 's|$|)*100/'$2'|' $1) | bc -l > ~/misc/pipe3&
  paste ~/misc/pipe1 ~/misc/pipe2 ~/misc/pipe3
else
  paste ~/misc/pipe1 ~/misc/pipe2
fi