par2those

#!/bin/bash
startTime=$(date '+%Y-%m-%d %H:%M:%S')
cwd=$(pwd)
echo Current Directory = $cwd

[ "$1" != "" ] && name=$1 || name=$(basename $cwd)

num=$(ls -lAh $name* | grep -v "^d" | wc -l)
[ "$num" -eq 0 ] && echo "Info: No files found. Exit." && exit
[ "$num" -lt 3 ] && rate=10 || rate=$((100/$num+1))
[ "$rate" -lt "2" ] && rate=2 
echo "Prefix: $name"
echo "Total files: $num "
echo "Rate: $rate"

# create 
cmd="par2 c -r$rate -T2 -n3 -u -m1024 par2-$name.par2 $name*"
echo "Command: $cmd"
read -p "Continue ? [Y/n] " -e confirm
[ "$confirm" == "" ] || [ "$confirm" == "y" ] || [ "$confirm" == "Y" ] && $cmd || exit

# move
echo "Moving files to par2/"
mkdir -p par2
mv par2-$name* par2/
echo "Done."

# report
endTime=$(date '+%Y-%m-%d %H:%M:%S')
echo
echo "Start time: $startTime"
echo "End time: $endTime"
startTime=$(date -d "${startTime}" +%s)
endTime=$(date -d "${endTime}" +%s)
runTime=$((endTime-startTime))
echo "Run time: ${runTime} seconds"