#!/bin/bash

#
# This file can be used to check that fastback and fastback-unload-receipt
# are working IF you can write a script that fetches the file back from
# the remote ftp server: see ./fetch-from-remote
#
# You must rewrite fetch-from-remote for this to work correctly
#
# 

# ./fastback-check FILE [encrypt] [TICKET]
#
#   where 
#      FILE is the name of the file to test with
#      TICKET is the name of the ticket or the string "new" to 
#         indicate that you what to specify "-n" to fastback
#   if specified as the second argument "encrypt" will cause -e to be
#     passed to fastback
#   the second and third arguments are optional
# 


ORIG=$1

if [ ! -e $ORIG ]; then
  echo >&2 "Error: no such file $ORIG"
  exit 2
fi

if [ "$2" = "encrypt" ]; then
  DO_ENCRYPT="-e"
  shift
else
  DO_ENCRYPT=""
fi

if [ "$2" = "" ]; then
  DO_TICKET=
elif [ "$2" = "new" ]; then 
  DO_TICKET="-n"
else
  DO_TICKET="-t $2"
fi

RECEIPT=GLRK-receipt
fastback $DO_TICKET $DO_ENCRYPT $ORIG >$RECEIPT

if [ ! -e $RECEIPT ]; then
  echo >&2 "Error: no such file $RECEIPT"
  exit 2
fi

cat $RECEIPT | while read FIRST REST ; do 
  #echo "FIRST:" $FIRST
  #echo "REST:" $REST

  if [ "$FIRST" = "FILE:" ]; then
    export FILE=$REST
    if [ -z "$FILE" ]; then
      echo >&2 "Error: file name missing from \"FILE:\" line"
      exit 2
    fi  
    #echo found FILE: $FILE
  fi
  if [ "$FIRST" = "END:" ]; then
    if [ -z "$FILE" ]; then 
      echo >&2 "Error: no file name found in receipt: $RECEIPT"
      exit 2
    fi

    ./fetch-from-remote $FILE

    fastback-unload-receipt $RECEIPT

    FETCHED=${FILE%.aes}

    # if the fetched file has a trailing .gz
    #   but the orig doesn't then assume fastback did compression
    #   and use zdiff to do compare 
    if [ "$FETCHED" != "${FETCHED%.gz}" -a "$ORIG" = "${ORIG%.gz}" ]; then
       if ! zdiff $ORIG $FETCHED ; then
           echo "differ: ORIG ($ORIG) and FETCHED ($FETCHED)"
       else
           echo "same: ORIG: ($ORIG) and FETCHED ($FETCHED)"
           rm GLRK*
       fi
    else
    # otherwize just use diff
       if ! diff $ORIG $FETCHED ; then
           echo "differ: ORIG ($ORIG) and FETCHED ($FETCHED)"
       else
           echo "same: ORIG: ($ORIG) and FETCHED ($FETCHED)"
           rm GLRK*
       fi
    fi
  fi
done