#!/bin/bash

# script will change the expiration date of the all backups for a bank
# that are older than time specified

# -b bank-name
# -a age
#    age is number of days like 45 or 90
# -l (just list the changes that would be amde)

BANK=''
((AGE=180))
DISPLAY_ONLY='no'

# grab parameters
while [ "X$1" != "X" ]
 do
    case $1 in
#   bank option
        '-b' ) 
            shift
            BANK="$1"
            ;;
      
#   age option
        '-a' ) 
            shift
            tmp="$1"
            ((AGE = tmp + 0))
            ;;

#   display only option
        '-l' ) 
            DISPLAY_ONLY='yes'
            ;;
#   Usage
        * ) 
            echo "Usage: $0 -b <bank-path> -a <days> [-l]"
            echo "    bank-path -- path to bank"
            echo "    days -- numbers that trees older than that will be marked as expired"
            echo "    -l -- code only displays which trees it would change"
            exit
    esac
    shift
 done

cd $BANK || (echo "Warning: Cannot cd into $BANK"; exit 1)

for dir in 2*
 do
     cd $dir
     dt=$(cat summary | grep Expire: | awk -F '=' '{print $3}')
     CurrentExpire=$(date --utc --date "$dt" "+%Y-%j")
     MaxExpire=$(date "+%Y-%j" -d "-${AGE} days")
     if [[ $MaxExpire > $CurrentExpire 
 done