Import photos to NAS, and put them into YYYY/MM folders

mv-photos.rb

require 'date'
require 'exif' # in turn requires libexif
require 'fileutils'
require 'json'

SOURCE = '/Volumes/home/Drive/GDrive/Takeout/Google Photos'
DEST = '/Volumes/home/Photos/PhotoLibrary'

def main
  traverse(SOURCE)
end

def traverse(dir_or_file)
  Dir.each_child(dir_or_file) do |x|
    loc = dir_or_file + "/" + x
    if File.directory?(loc)
      traverse(loc)
      puts "Going into dir #{loc}"
    else
      puts "Processing file #{loc}"
      process_file(loc)
    end
  end
end

def process_file(file)
  if File.extname(file) == ".json"
    puts "Ignoring non-image file #{file}"
    return
  end #if

  # Use EXIF data whenever possible
  begin
    date = Exif::Data.new(File.open(file)).date_time.split(" ")[0].split(":")
    target_subdir = DEST + "/" + date[0,2].join("/")
    unless Dir.exist?(target_subdir)
      FileUtils.mkdir_p(target_subdir)
    end
    puts "EXIF found. Moving #{file} to #{target_subdir}"
    FileUtils.mv(file, target_subdir)
    return
  rescue NoMethodError, Exif::NotReadable
    puts "File has no readable EXIF data"
    # Read data from json as the first fallback
    if (File.file?(File.basename(file, ".*") + ".json"))
      json_data = JSON.parse(File.read(File.basename(file, ".*") + ".json"))
      begin
        date = Time.at(json_data["photoTakenTime"]["timestamp"].to_i).to_s.split(" ")[0].split("-")
        target_subdir = DEST + "/" + date[0,2].join("/")
        unless Dir.exist?(target_subdir)
          FileUtils.mkdir_p(target_subdir)
        end
        puts "JSON found. Moving #{file} to #{target_subdir}"
        FileUtils.mv(file, target_subdir)
        return
      rescue
        puts "photoTakenTime unknown"
      end #begin
    end #if

    # Fall back to file name match
    if (file.match?(/wx_camera_[0-9]{10}/) || file.match?(/mmexport[0-9]{10}/)) # 微信
      timestamp = file.match(/[0-9]{10}/).to_s.to_i
      date = Time.at(timestamp).to_s.split(" ")[0].split("-")
      target_subdir = DEST + "/" + date[0,2].join("/")
      unless Dir.exist?(target_subdir)
        FileUtils.mkdir_p(target_subdir)
      end
      puts "Time stamp match. Moving #{file} to #{target_subdir}"
      FileUtils.mv(file, target_subdir)
      return
    end #if

    if (file.match?(/20[0-9]{2}-[0-1][0-9]-[0-3][0-9]/))
      date = file.match(/20[0-9]{2}-[0-1][0-9]-[0-3][0-9]/).to_s.split("-")
      target_subdir = DEST + "/" + date[0,2].join("/")
      unless Dir.exist?(target_subdir)
        FileUtils.mkdir_p(target_subdir)
      end
      puts "File name match. Moving #{file} to #{target_subdir}"
      FileUtils.mv(file, target_subdir)
      return
    end #if

    if (file.match?(/20[0-9]{6}/))
      dat = file.match(/20[0-9]{6}/).to_s # "20181231"
      date = [dat[0,4], dat[4,2], dat[6,2]]
      target_subdir = DEST + "/" + date[0,2].join("/")
      unless Dir.exist?(target_subdir)
        FileUtils.mkdir_p(target_subdir)
      end
      puts "File name match. Moving #{file} to #{target_subdir}"
      FileUtils.mv(file, target_subdir)
      return
    end #if
  end #begin
end

main()