#!/bin/bash

if [ "$1" == "" ] ; then
  echo Use the timestamped name of Canon .thm files to timestamp corresponding .avi files
  echo Specify the directory at the root of the tree to operate on:
  echo "  " `basename $0` dir
  exit
fi

if [ -d "$1" ] ; then
  # if we've got a directory then do a find on it and call ourself with each .avi file found
  echo $1
  find $1 -name '*.avi' -exec $0 {} \;
  exit
fi

if [ ! -f "$1" ] ; then 
  echo "*** ERROR *** must have name of file to convert or directory to start"; 
  exit; 
fi

# if we've got a file then we've been called by find (above) to timestamp it from its .thm
# strip the directory path from the file+ext
filext=`basename "$1"`
# get the directory part of the filespec by losing everything after the last '/'
path=`echo $1 | sed -e 's/[^\/]*$//'`
# get the filename without the '.avi' extension
file=`basename "$filext" .avi`
# try to find the .thm file corresponding to this .avi
thmfile=`ls "${path}" | grep "$file.thm"`
if [ "$thmfile" != "" ] ; then
  # get the timestamped name of the .thm file without its extension
  thmbase=`basename $thmfile .thm`
  # rename the .avi file with this timestamped name
  echo mv "$1" '->' "${path}${thmbase}.avi"
  mv "$1" "${path}${thmbase}.avi"
fi