+require 'i18n/gettext'
+require 'i18n/gettext/po_parser'
+
+# Experimental support for using Gettext po files to store translations.
+#
+# To use this you can simply include the module to the Simple backend - or
+# whatever other backend you are using.
+#
+# I18n::Backend::Simple.include(I18n::Backend::Gettext)
+#
+# Now you should be able to include your Gettext translation (*.po) files to
+# the I18n.load_path so they're loaded to the backend and you can use them as
+# usual:
+#
+# I18n.load_path += Dir["path/to/locales/*.po"]
+#
+# Following the Gettext convention this implementation expects that your
+# translation files are named by their locales. E.g. the file en.po would
+# contain the translations for the English locale.
+module I18n
+ module Backend
+ module Gettext
+ class PoData < Hash
+ def set_comment(msgid_or_sym, comment)
+ # ignore
+ end
+ end
+
+ protected
+ def load_po(filename)
+ locale = ::File.basename(filename, '.po').to_sym
+ data = normalize(locale, parse(filename))
+ { locale => data }
+ end
+
+ def parse(filename)
+ GetText::PoParser.new.parse(::File.read(filename), PoData.new)
+ end
+
+ def normalize(locale, data)
+ data.inject({}) do |result, (key, value)|
+ unless key.nil? || key.empty?
+ key = key.gsub(I18n::Gettext::CONTEXT_SEPARATOR, '|')
+ key, value = normalize_pluralization(locale, key, value) if key.index("\000")
+
+ parts = key.split('|').reverse
+ normalized = parts.inject({}) do |_normalized, part|
+ { part => _normalized.empty? ? value : _normalized }
+ end
+
+ result.deep_merge!(normalized)
+ end
+ result
+ end
+ end
+
+ def normalize_pluralization(locale, key, value)
+ # FIXME po_parser includes \000 chars that can not be turned into Symbols
+ key = key.gsub("\000", I18n::Gettext::PLURAL_SEPARATOR).split(I18n::Gettext::PLURAL_SEPARATOR).first
+
+ keys = I18n::Gettext.plural_keys(locale)
+ values = value.split("\000")
+ raise "invalid number of plurals: #{values.size}, keys: #{keys.inspect} on #{locale} locale for msgid #{key.inspect} with values #{values.inspect}" if values.size != keys.size
+
+ result = {}
+ values.each_with_index { |_value, ix| result[keys[ix]] = _value }
+ [key, result]
+ end
+
+ end
+ end
+end