Renames images to their IPTC captions, suffixing them with the original filename as well. Example: 1-bar.jpg => bar-to-the-awesome - 1-bar.jpg Very hacky, but it scratched my itch and might help someone else too. :)

rename_images_to_their_iptc_captions.rb

# encoding: utf-8
# Renames images to their IPTC captions, suffixing them with the original filename as well.
# Example: 
#   1-bar.jpg => bar-to-the-awesome - 1-bar.jpg
# Very hacky, but it scratched my itch and might help someone else too. :)
require 'fileutils'
require 'iptc'
FileUtils.cd("path/to/source/images")
output_dir = "renamed"
FileUtils.mkdir(output_dir) unless File.exist?(output_dir)

errored_files = {}
Dir.glob("*.jpg").each do |file|
  puts "Processing #{file}:"
  begin
  image = IPTC::JPEG::Image.from_file(file)
  caption = image.values['iptc/Caption'].value.gsub(/\s/,' ').strip
  unless caption or caption == ''
    puts "  Couldn't find caption. Skipping #{file}"
    next
  end
  puts "  Found caption: #{caption}"
  new_name = File.join(caption + ' - ' + File.basename(file))
  new_name = new_name.gsub(' & ', ' en ').gsub('&', ' en ').gsub(/[\/\!*]/, '-').gsub('?', ' misschien')
  new_name = File.expand_path(File.join('.', output_dir, new_name))
  if new_name.size > 255
    puts "  Filepath too large: #{new_name.size} characters. Trimming!"
    ending = new_name[-16..-1]
    new_name.gsub!(/#{ending}\z/,'')
    new_name = new_name[0..249] + ending
    puts "  Filepath trimmed to #{new_name.size} characters: #{new_name}"
  end
  puts "  Copying #{file} to #{new_name}"
    FileUtils.cp(file,new_name)
  rescue Exception => e
    errored_files[File.basename(file)] = {'source' => file, 'target' => (new_name rescue nil), 'error' => e}
    puts "  Error with #{file}:"
    puts "  #{e.to_yaml}"
  end
  puts "  ------"
end
puts 'Errors:'
errored_files.each do |filename, data|
  puts "#{filename}:"
  puts " source: #{data['source']}"
  puts " target: #{data['target']}"
  puts " error:"
  puts "   #{data['error'].to_yaml}"
end