mastodon/app/controllers/concerns/localized.rb

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# frozen_string_literal: true
module Localized
extend ActiveSupport::Concern
included do
before_action :set_locale
end
private
def set_locale
I18n.locale = default_locale
I18n.locale = current_user.locale if user_signed_in?
rescue I18n::InvalidLocale
I18n.locale = default_locale
end
def default_locale
if ENV['DEFAULT_LOCALE'].present?
I18n.default_locale
else
request_locale || I18n.default_locale
end
end
def request_locale
preferred_locale || compatible_locale
end
def preferred_locale
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http_accept_language.preferred_language_from(available_locales)
end
def compatible_locale
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http_accept_language.compatible_language_from(available_locales)
end
def available_locales
I18n.available_locales.reverse
end
end