Download a Google Photos Album in order (a rather hacky approach, but the only one I found)

download-google-photos-album-in-order.sh

# Developed for Firefox on Mac
#
# 1. Empty your Downloads folder
# 2. Create a subdirectory under Downloads called `google-photos-download`
# 3. Run the following script with your Downloads folder as the working directory
# 4. Through your browser, one photo at a time (starting with the first until the last), select it with the mouse and press Shift+D to download
#     once your browser releases the lock on the file, the script will move it to ./google-photos-download and rename it so its name reflects its order
#
# I found it helpful to have the Downloads and google-photos-download folders open and visible in Finder windows to get feedback about 
# what the script is doing. I also have the terminal window in a corner to see the script output, and Firefox on the rest of the screen
# for downloading. 

set -x
while true
do
  sleep 3
  echo working
  file="$(du -k ./*.* | grep -v ".part" | grep -v ".vim" | sort -nr | head -n 1 | awk '{print $2}' | sed "s/^..//")"

  [[ "$file" != "" ]] && [[ "$(du -k $file | awk '{print $1}')" != "0" ]] && {
    echo processing $file file

    [[ "$(/usr/sbin/lsof $file | wc -l | awk '{ print $1 }')" == "0" ]] && {
      echo $file \
        | sed "p;s/[^\.]*./google-photos-download\/$(node -e "console.log(('0000' + (1 + $(ls google-photos-download/*.* | wc -l))).slice(-4))")./" \
        | xargs -t -n 2 mv
    }
  }

done