#!/usr/bin/env ruby
require 'optparse'
require 'nokogiri'

# This will hold the options we parse
options = {}

# Build command line parser
OptionParser.new do |p|
  
  # Take a filename for the input
  p.on("-i", "--infile INFILE", "The name of the file to process") do |v|
    options[:infile] = v
  end

  # Take a filename for the output file
  p.on("-o", "--outfile OUTFILE", "The name of the file to save") do |u|
    options[:outfile] = u
  end
end.parse!


# Open file with Nokogiri and set file encoding to UTF-8
doc = File.open(options[:infile]) { |f| Nokogiri::XML(f) }
doc.encoding = 'utf-8'

# Iterate through the trans-unit elements, get content of source and the target, remove seg-source
doc.xpath('//trans-unit').each do |t|
  t.at_xpath('source').content = t.at_xpath('source').content
  t.at_xpath('target').content = t.at_xpath('target').content
  t.at_xpath('seg-source').remove
end

# Write the final file
File.write(options[:outfile], doc.to_xml)