Tumblr blog trimmer

#!/bin/sh

exec 2>/dev/null

root_dir=$(realpath $1)
meta_dir="$root_dir/!meta"

for blog in $root_dir/*; do
  if [ ! -d $blog ]; then
    continue
  fi

  if [ $blog = $meta_dir ]; then
    echo 'Meta dir found, skipping...'
    continue
  fi

  for dir in $(find $blog -d 1 -type d -not -name 'json' -not -name 'media'); do
    rm -rf "$dir"
  done

  json_dir="$blog/json"

  if [ -d $json_dir ]; then
    find $json_dir -d 1 -type f -not -name '*.json' -exec rm -f "{}" \;
  else
    if [ -e $json_dir ]; then
      rm -rf "$json_dir"
    fi

    mkdir "$json_dir"
  fi

  for file in $(find $blog -d 1 -type f -name '*.json' | sort -r); do
    file_name=$(basename $file)

    hash=$(md5 -q $file)
    if [ $(find $json_dir -d 1 -type f -name '*json' | xargs md5 -q | grep -c "$hash") -lt 1 ]; then
      mv "$file" "$json_dir/$file_name"
      continue
    fi

    rm -f "$file"
  done

  media_dir="$blog/media"

  if [ -d $media_dir ]; then
    for image in $(find $media_dir -d 1 -type f); do
      image_type=$(identify -format '%m\n' "$image" | awk 'NR==1 { print tolower($1) } NR > 1 { exit }')

      # Not an image and not JSON since we've already removed them
      if [ -z "$image_type" ]; then
        rm -f "$image"
        continue
      fi

      # Image, need to move it to media_dir
      image_name="$(basename $image | awk -F '.' 'NR==1 { print $1 } NR > 1 { exit }').$image_type"
      if [ "$image_name" = "$(basename $image)" ]; then
        continue
      fi

      mv "$image" "$media_dir/$image_name"
    done
  else
    if [ -e $media_dir ]; then
      rm -rf "$media_dir"
    fi

    mkdir "$media_dir"
  fi

  for image in $(find $blog -d 1 -type f); do
    image_type=$(identify -format '%m\n' "$image" | awk 'NR==1 { print tolower($1) } NR > 1 { exit }')

    # Not an image and not JSON since we've already removed them
    if [ -z "$image_type" ]; then
      rm -f "$image"
      continue
    fi

    # Image, need to move it to media_dir
    image_name="$(basename $image | awk -F '.' 'NR==1 { print $1 } NR > 1 { exit }').$image_type"
    mv "$image" "$media_dir/$image_name"
  done

  if [ $(ls $media_dir | wc -l) -lt 1 ]; then
    rm -rf $blog
    printf 'Removed empty blog %s\n' $(basename $blog)
    continue
  fi

  printf 'Trimmed %s\n' $(basename $blog)
done