#!/bin/bash
DIR="$1"

# failsafe - fall back to current directory
[ "$DIR" == "" ] && DIR="."

# save and change IFS
OLDIFS=$IFS
IFS=$'\n'

# read all file name into an array
fileArray=($(find $DIR -type f))

# restore it
IFS=$OLDIFS

# get length of an array
tLen=${#fileArray[@]}
echo "Number of files $tLen"

# use for loop read all filenames
for (( i=0; i<${tLen}; i++ ));
do
	thisFile=${fileArray[$i]}
	fileType=$(file -b -I ${fileArray[$i]})
	if ! [[ $fileType == *"image"* ]]; then
		echo "$thisFile is not an image ... skipping"
		continue
	fi
	echo -n "$thisFile "
	exiftool "${fileArray[$i]}" -ExifIFD:DateTimeOriginal
	#change file Create Date
	exiftool -overwrite_original '-CreateDate<DateTimeOriginal' "${fileArray[$i]}"
	#change file OS modify date
	exiftool -overwrite_original '-FileModifyDate<DateTimeOriginal' "${fileArray[$i]}"
	#rename file
	exiftool '-FileName<DateTimeOriginal' -d "%Y-%m-%d %H.%M.%S%%-c.%%e" "${fileArray[$i]}"
done