app/services/set_localization_service.rb
#-- copyright
# OpenProject is an open source project management software.
# Copyright (C) the OpenProject GmbH
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2013 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# See COPYRIGHT and LICENSE files for more details.
#++
class SetLocalizationService
attr_reader :user, :http_accept_header
include Redmine::I18n
def initialize(user, http_accept_header = nil)
@user = user
@http_accept_header = http_accept_header
end
##
# Sets the locale.
# The locale is determined with the following priority:
#
# 1. The language as configured by the user.
# 2. The first language defined in the Accept-Language header sent by the browser.
# 3. OpenProject's default language defined in the settings.
def call
lang = user_language || header_language || default_language
set_language_if_valid(lang)
end
private
def user_language
find_language_or_prefix(user.language) if user.logged?
end
def header_language
return unless http_accept_header
accept_lang = parse_qvalues(http_accept_header).first
find_language_or_prefix accept_lang
end
def default_language
Setting.default_language
end
# qvalues http header parser
# code taken from webrick
def parse_qvalues(value)
tmp = []
if value
parts = value.split(/,\s*/)
parts.each do |part|
match = /\A([^\s,]+?)(?:;\s*q=(\d+(?:\.\d+)?))?\z/.match(part)
if match
val = match[1]
q = (match[2] || 1).to_f
tmp.push([val, q])
end
end
tmp = tmp.sort_by { |_val, q| -q }
tmp.map! { |val, _q| val }
end
tmp
rescue StandardError
nil
end
def find_language_or_prefix(language)
return nil unless language
language = language.to_s.downcase
find_language(language) || find_language(language.split("-").first)
end
end