Apply watermark with datetime on camera images

#!/bin/bash
CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
JPG_DIRECTORY="${CURRENT_DIR}/jpg"
WATERMARK_DIRECTORY="${CURRENT_DIR}/watermark"
mkdir -p "${WATERMARK_DIRECTORY}"
cd "${JPG_DIRECTORY}"
for file in *.jpg
do
date_string=`stat -c %y% "$file" | cut -d ' ' -f1`
year=`echo "$date_string" | cut -d '-' -f1`
month=`echo "$date_string" | cut -d '-' -f2`
day=`echo "$date_string" | cut -d '-' -f3`
dir_path="${year}/${month}/${day}";
today=`date +"%Y/%m/%d"`
if [ $dir_path = $today ]; then
echo $file today skipped
continue
fi
echo -n "$file "
MESSAGE=`stat -c %y% "$file" | cut -d '.' -f1`
echo "$MESSAGE"
convert "$file" -fill white -stroke black -pointsize 20 -draw "gravity southeast fill white stroke black text 5,5 '${MESSAGE}'" ${WATERMARK_DIRECTORY}/"$file"
if [ "$?" == "0" ]; then
rm "$file"
else
echo "ERROR making video"
fi
done