WtU Raffle Script

raffle.sh

#!/bin/bash

workingfile="$(mktemp)"
shuffledfile="$(mktemp)"
winners="$(mktemp)"

[ -z $1 ] && echo "Need a number of winners, yo." && exit 1

while read line
do
  entry=1
  count=$(echo $line|awk '{print $2}')
  ticket="$(echo $line|awk '{print $1}')"

  while [[ $entry -le $count ]]
  do
    echo "$ticket" >> $workingfile
    let ++entry
  done
done

totalentries="$(wc -l $workingfile|awk '{print $1}')"
echo -e "\033[36m$totalentries total entries\n\033[0m"

shuf $workingfile | sed '/^$/d' > $shuffledfile

while [ "$(wc -l $winners|sed "s/ .*//")" -lt "$1" ]
do
  winningticket=$(awk "FNR==$(shuf -i 1-$totalentries -n1) {print \$0}" $shuffledfile)
  grep $winningticket $winners &> /dev/null || echo $winningticket >> $winners
done

shuf $winners

rm $workingfile
rm $shuffledfile
rm $winners