Organizing exported from *.photoslibrary pictures

organize.sh

#!env bash
#https://gist.github.com/paunin/e4f9f01a1cfcfc99828b75d4fd29ac96
# Export files from apple *.photoslibrary (File->Export Unmodified Original) with options "Subfolder Format = Moment Name"
# Run the script against the folder where the images were exported. 
# Subfolders will be renamed from format `{MOMENT_NAME}, d Month YYYY` to `YYYY.mm.dd[{MOMENT_NAME}]`
# example: `Da Lat - Phường 8 - Tỉnh Lâm Đồng, 3 May 2016` => 2016.05.03[Da Lat - Phường 8 - Tỉnh Lâm Đồng]

DIR=$1
if [[ "$DIR" == "" ]]; then
    echo "Error: please pass \$1 for directory to organize! "
    exit 1
fi
echo "Organizing '$DIR'..."
ls $DIR > source.txt


while read -r SOURCE; do 
    DEST=`echo $SOURCE | \
        sed -e 's/ January /.01./g' \
            -e 's/ February /.02./g' \
            -e 's/ March /.03./g' \
            -e 's/ April /.04./g' \
            -e 's/ May /.05./g' \
            -e 's/ June /.06./g' \
            -e 's/ July /.07./g' \
            -e 's/ August /.08./g' \
            -e 's/ September /.09./g' \
            -e 's/ October /.10./g' \
            -e 's/ November /.11./g' \
            -e 's/ December /.12./g' \
            \
            -e 's/\(.*\),\ \([0-9]\{1,2\}\.[0-9]\{2\}\.[0-9]\{4\}\)/\2[\1]/g' \
            -e 's/^\([0-9]\{1\}\.\)/0\1/g' \
            -e 's/\([0-9]\{2\}\)\.\([0-9]\{2\}\)\.\([0-9]\{4\}\)/\3.\2.\1/g'
        `
        # here ^ 4 steps:
        # 1. Replace month names with number (January => .01.; February => .02.)
        # 2. Moving Date to the begining of the name and put moment_name into breakets
        # 3. Adding leading zero to the `day` part of the date
        # 4. Changing date format from dd.mm.yyyy to yyyy.mm.dd
        echo ">>> Moving '$SOURCE' ---> '$DEST'"
    mv "$DIR/$SOURCE" "$DIR/$DEST"
done < source.txt
rm source.txt