#!/bin/bash



# Copyright (c) Michael Still 2002

# Released under the terms of the GNU GPL



# In this case, Nemo wants to be able to specify a list of items, with

# weights associated with them...



# $1 is the list with weights, in the form:

# "1 frog 2 banana 3 hamster"



# Scary assumption number one, people hand me correctly formatted lists

# Incidentally, this will break with numbers exist in the items I am handed

# e.g. Banana42 will break this

NUMBERS=`echo $1 | sed 's/[^0-9 ]//g'`

WORDS=`echo $1 | sed 's/[0-9]//g'`

WEIGHTED=""



# Build the list of options, including the weights

for NUM in $NUMBERS

do

  WORD=`echo $WORDS | sed 's/ .*$//'`

  WORDS=`echo $WORDS | sed "s/^$WORD *//"`



  COUNT=0

  while [ $COUNT -lt $NUM ]

  do

    WEIGHTED=`echo "$WEIGHTED $WORD"`

    COUNT=$(( $COUNT + 1 ))

  done  

done



# Get the random number

LOBOUND=1

HIBOUND=`echo $WEIGHTED | wc -w`

RANDMAX=32767

BINUMBER=$(( $LOBOUND + ($HIBOUND * $RANDOM) / ($RANDMAX + 1) ))



# Get the item -- I can't use shift, because it is not on the command line

COUNT=1

while [ $COUNT -lt $BINUMBER ]

do

  WEIGHTED=`echo $WEIGHTED | sed 's/^[^ ]*//'`

  COUNT=$(( $COUNT + 1 ))

done



# The first word should be magic selected one

echo $WEIGHTED | sed 's/ .*$//'