#!/usr/bin/env ruby
# encoding: UTF-8
# coding: UTF-8

require 'fileutils'

# Displays message when something goes wrong
def check condition, err_msg
  if condition then puts err_msg + ' For help use -h or --help.'; abort end
end

# To the root directory
Dir.chdir(File.dirname(__FILE__) + '/../..')

# Variables
pot_dir  = 'content/pot/'
pot_path = ''
po_dir   = 'content/po/'
po_name  = ''
locales  = ['en', 'es']

# Displays help
if ARGV[0] =~ /-h/
  puts "pot2pos generates po files from a pot file."
  puts "\nUse:"
  puts "  pot2pos [pot file] [option]"
  puts "\nOption:"
  puts "  -m  Merges to an existing po file."
  puts "\nExamples:"
  puts "  pot2pos file.pot"
  puts "  pot2pos file.pot -m"
  puts "\nCurrent supported locales:"
  puts "  " + locales.join("\n  ")
  puts "\nThe pot file has to be in '#{pot_dir}' and the po files are going to be stored in '#{po_dir}*', where '*' are the locales folders."
  abort
end

# Checks if the user gave the path to the file
check(ARGV[0] == nil, "ERROR: File is required.")

# Cleans path
pot_path = pot_dir + File.basename(ARGV[0])
po_name  = File.basename(ARGV[0], '.*') + '.po'

# Checks if the file exists
check(File.exist?(pot_path) == false, "ERROR: File doesn't exist.")

# Creates locale directory if need it
locales.each do |l|
  if File.exist?(po_dir + l) == false
    Dir.mkdir(po_dir + l)
  end
end

# Creates or merges po files
locales.each do |l|
  if ARGV[1] == nil
    system("msginit --input=#{pot_path} --locale=#{l} --no-translator --output=#{po_dir + l}/#{po_name}")
  else
    system("msgmerge --update #{po_dir + l}/#{po_name} #{pot_path}")
  end
end