#!/bin/sh

#The script made by dri to rename deleted MH files into valid and readable ones and put them to thetrash folder.
# @(#) s1       Demonstrate move and rename.

# Provide audit trail for learning and debugging.
# Interchange the two debug lines to toggle printing on and off.

debug="echo"
debug=":"

# Set up the test situation.
# For production, comment out the remove and create calls.

./remove
./create

#You need to modify the script a bit in order to add more folders, if you have any.

count() {
  local a b c d total
  a=$( ls -1 drafts | wc -l )
  b=$( ls -1 inbox | wc -l )
  c=$( ls -1 outbox | wc -l )
  d=$( ls -1 trash | wc -l )
  total=$( expr $a + $b + $c )

  echo " total = $total"
  echo " trash = $d"
}
count

echo
DIRS="drafts inbox outbox"
echo " Current state:"
ls -R $DIRS trash

echo
$debug " audit trail of operations:"
$debug

highest=0
for d in $DIRS
do
  for file in $( ls -1 $d/ | grep '^,[0-9][0-9]*$' )
  do
    $debug " Working on $d/$file"
    n=${file#,}
    $debug " extracted :$n: from :$file: in :$d:"
    m=$( expr $n + 0 )
    $debug " transformed $n into $m"
    xform=$m
    if [ -f trash/$xform ]
    then
      highest=$( expr $highest + 1 )
      $debug " set highest number to :$highest:"
      while [ -f trash/$highest ]
      do
        $debug " highest increased to $highest"
        highest=$( expr $highest + 1 )
      done
      mv $d/$file trash/$highest
      $debug " moved (bumped) $d/$file to trash/$highest"
    else
      # echo mv $d/$xform trash
      mv $d/$file trash/$xform
      $debug " moved $d/$file to trash/$xform"
      highest=$xform
      $debug " set highest number to :$highest:"
    fi
  done
done

echo
echo " Final   state:"
ls -R $DIRS trash

echo
count

exit 0