module Refactor

# File lib/refactor.rb, line 7
def run(from, to)
  from_camelized = from.camelize
  from_dashed = from.dasherize
  from_humanized = from.humanize
  from_underscored = from.underscore
  to_camelized = to.camelize
  to_dashed = to.dasherize
  to_underscored = to.underscore

  camelized_regex = /(?<=\b|_)#{Regexp.quote(from_camelized)}(?=\b|_)/
  dashed_regex = /(?<=\b|_)#{Regexp.quote(from_dashed)}(?=\b|_)/
  underscored_regex = /(?<=\b|_)#{Regexp.quote(from_underscored)}(?=\b|_)/

  # all files in current directory
  Dir.glob('**/*') do |old_path|
    # ignore certain directories
    unless old_path =~ %r{\A(coverage|pkg|tmp|vendor)(\z|/)}
      # only check the basename so that the directory doesn't get renamed twice
      old_basename = File.basename(old_path)
      new_basename = old_basename.dup
      new_basename.gsub!(dashed_regex, to_dashed)
      new_basename.gsub!(underscored_regex, to_underscored)

      if new_basename == old_basename
        # no change
        new_path = old_path
      else
        # rename file
        new_path = File.join(File.dirname(old_path), new_basename)
        puts "#{old_path} –> #{new_path}"
        FileUtils.mv(old_path, new_path)
      end

      if File.file?(new_path)
        # replace within file
        old_text = File.read(new_path)

        new_text = old_text.dup
        new_text.gsub!(camelized_regex, to_camelized)
        new_text.gsub!(dashed_regex, to_dashed)
        new_text.gsub!(underscored_regex, to_underscored)

        unless new_text == old_text
          # rewrite existing file
          File.write(new_path, new_text)
        end

        # show possible matches in body
        line_num = 0
        new_text.each_line do |old_line|
          new_line = old_line.gsub(/#{Regexp.quote(from_humanized)}/i, "\e[33m\\0\e[0m")
          unless new_line == old_line
            puts "\e[36m#{new_path}:#{line_num}\e[0m #{new_line}"
          end
          line_num += 1
        end
      end
    end
  end
end

# File lib/refactor.rb, line 7
def run(from, to)
  from_camelized = from.camelize
  from_dashed = from.dasherize
  from_humanized = from.humanize
  from_underscored = from.underscore
  to_camelized = to.camelize
  to_dashed = to.dasherize
  to_underscored = to.underscore

  camelized_regex = /(?<=\b|_)#{Regexp.quote(from_camelized)}(?=\b|_)/
  dashed_regex = /(?<=\b|_)#{Regexp.quote(from_dashed)}(?=\b|_)/
  underscored_regex = /(?<=\b|_)#{Regexp.quote(from_underscored)}(?=\b|_)/

  # all files in current directory
  Dir.glob('**/*') do |old_path|
    # ignore certain directories
    unless old_path =~ %r{\A(coverage|pkg|tmp|vendor)(\z|/)}
      # only check the basename so that the directory doesn't get renamed twice
      old_basename = File.basename(old_path)
      new_basename = old_basename.dup
      new_basename.gsub!(dashed_regex, to_dashed)
      new_basename.gsub!(underscored_regex, to_underscored)

      if new_basename == old_basename
        # no change
        new_path = old_path
      else
        # rename file
        new_path = File.join(File.dirname(old_path), new_basename)
        puts "#{old_path} –> #{new_path}"
        FileUtils.mv(old_path, new_path)
      end

      if File.file?(new_path)
        # replace within file
        old_text = File.read(new_path)

        new_text = old_text.dup
        new_text.gsub!(camelized_regex, to_camelized)
        new_text.gsub!(dashed_regex, to_dashed)
        new_text.gsub!(underscored_regex, to_underscored)

        unless new_text == old_text
          # rewrite existing file
          File.write(new_path, new_text)
        end

        # show possible matches in body
        line_num = 0
        new_text.each_line do |old_line|
          new_line = old_line.gsub(/#{Regexp.quote(from_humanized)}/i, "\e[33m\\0\e[0m")
          unless new_line == old_line
            puts "\e[36m#{new_path}:#{line_num}\e[0m #{new_line}"
          end
          line_num += 1
        end
      end
    end
  end
end