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# frozen_string_literal: true
require 'i18n/gettext'
require 'i18n/gettext/po_parser'
module I18n
module Backend
# 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.
#
# To translate text <b>you must use</b> one of the translate methods provided by
# I18n::Gettext::Helpers.
#
# include I18n::Gettext::Helpers
# puts _("some string")
#
# Without it strings containing periods (".") will not be translated.
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