#!/usr/bin/env python
import sys
import gettext
try:
  import simplejson as json
except:
  sys.stderr.write("""\
simplejson module is not instaled.
Try to install:
  # easy_install simplejson\n""".format(sys.argv[0]))
  exit(255)

def mo2hash(domain, path, lang = []):
  translations = gettext.translation(domain, path, lang)
  keys = translations._catalog.keys()
  keys.sort()
  result = {}
  for key in keys:
    value = translations._catalog[key]
    if type(key) is tuple:
      if key[0] not in result:
        result[key[0]] = []
      result[key[0]].append(value)
    else:
      result[key] = value
  return result

if len(sys.argv) < 4:
  sys.stderr.write("""\
Usage:
  {0} domain locales_dir language

Locale's path format:
  :locales_dir/:language/LC_MESSAGES/:domain.mo\n""".format(sys.argv[0]))
  exit(255)

try:
  translations = mo2hash(sys.argv[1], sys.argv[2], [sys.argv[3]])
  print json.dumps(translations, ensure_ascii = False).encode('utf-8')
except IOError as (errno, strerror):
    sys.stderr.write("I/O error({0}): {1}\n".format(errno, strerror))