Quick ruby script to back up tagged facebook photos

Gemfile

source 'https://rubygems.org'

gem 'koala'
gem 'awesome_print'
gem 'mini_exiftool'

import.rb

require 'koala'
require 'awesome_print'
require 'open-uri'
require 'mini_exiftool'

OAUTH_ACCESS_TOKEN = 'your facebook access token here'
LIMIT = 350

def photo_count(photos)
  sum = 0
  while photos
    sum += photos.count
    photos = photos.next_page
  end
  sum
end

def put_info(attr, value)
  "#{attr}: \"#{value}\"\n"
end

@graph = Koala::Facebook::API.new(OAUTH_ACCESS_TOKEN)
photos = @graph.get_connections("me", "photos", limit: LIMIT)

index = photo_count photos
while photos
  photos.each do |photo|
    filename = "fb_photo_#{index.to_s.rjust(4,'0')}.jpg"
    index -= 1
    unless File.exist?(filename)
      File.open(filename, 'wb') do |fo|
        fo.write open(photo['images'].first['source']).read
      end

      description = Hash.new

      file = MiniExiftool.new filename
      file.title = photo['name']
      file.album = photo['album']
      description['album'] = photo['album']
      file.author = photo['from']['name']
      description['author'] = photo['from']['name']
      file.datetimeoriginal = photo['backdated_time'] || photo['created_time']


      if photo['place']
        description['place'] = photo['place']['name']
        file.gpslatitude = photo['place']['location']['latitude']
        file.gpslongitude = photo['place']['location']['longitude']
      end

      description.reject!{|k, v| v.nil?}
      file.description = description.to_json

      file.save
    end
    ap filename
  end
  photos = photos.next_page
end