#!/usr/bin/env bash

#
# EXAMPLES:
#

#
#This script will rename files from 19560101_DSS.PDF to nwob_compo_fd_19990101_.pdf
#Years of data are 1956 - 1973

#This script looks for the _(underscores) and removes them and whatever comes directly after them.  It then inputs 
#frib_drawx_fd_ before the yyyymmdd. If the script finds a file already beginning with nwob, it will be ignored.
#If there is no data in a month, it will show an error but continue running.
start_year="${1}"
stop_year="${2}"
for yr in `seq -w ${start_year} ${stop_year}`
do
   for mo in `seq -w 01 12`
   do
      path="${yr}/${mo}"
      if [ -d ${path} ]
      then
         cd ${path}
         for file in *
         do
            f1="`echo $file | sed 's/_/ /g' | awk '{print $1}'`"
            f2="nwob_compo_fd_$f1.pdf"
                       mv $file $f2
         done
           cd ../..
      else
           echo "${path} does not exist, continuing"
      fi
   done
done