discourse/lib/js_locale_helper.rb

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module JsLocaleHelper
def self.load_translations(locale, opts=nil)
opts ||= {}
@loaded_translations = nil if opts[:force]
@loaded_translations ||= HashWithIndifferentAccess.new
@loaded_translations[locale] ||= begin
locale_str = locale.to_s
# load default translations
translations = YAML::load(File.open("#{Rails.root}/config/locales/client.#{locale_str}.yml"))
# load plugins translations
plugin_translations = {}
Dir["#{Rails.root}/plugins/*/config/locales/client.#{locale_str}.yml"].each do |file|
plugin_translations.deep_merge! YAML::load(File.open(file))
end
# merge translations (plugin translations overwrite default translations)
translations[locale_str]['js'].deep_merge!(plugin_translations[locale_str]['js']) if translations[locale_str] && plugin_translations[locale_str] && plugin_translations[locale_str]['js']
# We used to split the admin versus the client side, but it's much simpler to just
# include both for now due to the small size of the admin section.
#
# For now, let's leave it split out in the translation file in case we want to split
# it again later, so we'll merge the JSON ourselves.
admin_contents = translations[locale_str].delete('admin_js')
translations[locale_str]['js'].deep_merge!(admin_contents) if admin_contents.present?
translations[locale_str]['js'].deep_merge!(plugin_translations[locale_str]['admin_js']) if translations[locale_str] && plugin_translations[locale_str] && plugin_translations[locale_str]['admin_js']
translations
end
end
# purpose-built recursive algorithm ahoy!
def self.deep_delete_matches(deleting_from, *checking_hashes)
checking_hashes.compact!
new_hash = deleting_from.dup
deleting_from.each do |key, value|
if value.is_a? Hash
# Recurse
new_at_key = deep_delete_matches(deleting_from[key], *(checking_hashes.map {|h| h[key]}))
if new_at_key.empty?
new_hash.delete key
else
new_hash[key] = new_at_key
end
else
if checking_hashes.any? {|h| h.include? key}
new_hash.delete key
end
end
end
new_hash
end
def self.load_translations_merged(*locales)
@loaded_merges ||= {}
@loaded_merges[locales.join('-')] ||= begin
all_translations = {}
merged_translations = {}
loaded_locales = []
locales.map(&:to_s).each do |locale|
all_translations[locale] = JsLocaleHelper.load_translations locale
merged_translations[locale] = deep_delete_matches(all_translations[locale][locale], *loaded_locales.map { |l| merged_translations[l] })
loaded_locales << locale
end
merged_translations
end
end
def self.output_locale(locale)
locale_sym = locale.to_sym
locale_str = locale.to_s
current_locale = I18n.locale
I18n.locale = locale_sym
site_locale = SiteSetting.default_locale.to_sym
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if Rails.env.development?
translations = load_translations(locale_sym, force: true)
else
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if locale_sym == :en
translations = load_translations(locale_sym)
elsif locale_sym == site_locale || site_locale == :en
translations = load_translations_merged(locale_sym, :en)
else
translations = load_translations_merged(locale_sym, site_locale, :en)
end
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end
message_formats = strip_out_message_formats!(translations[locale_str]['js'])
result = generate_message_format(message_formats, locale_str)
result << "I18n.translations = #{translations.to_json};\n"
result << "I18n.locale = '#{locale_str}';\n"
# loading moment here cause we must customize it
result << File.read("#{Rails.root}/lib/javascripts/moment.js")
result << moment_locale(locale_str)
result << moment_formats
I18n.locale = current_locale
result
end
def self.moment_formats
result = ""
result << moment_format_function('short_date_no_year')
result << moment_format_function('short_date')
result << moment_format_function('long_date')
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result << "moment.fn.relativeAge = function(opts){ return Discourse.Formatter.relativeAge(this.toDate(), opts)};\n"
end
def self.moment_format_function(name)
format = I18n.t("dates.#{name}")
"moment.fn.#{name.camelize(:lower)} = function(){ return this.format('#{format}'); };\n"
end
def self.moment_locale(locale_str)
# moment.js uses a different naming scheme for locale files
locale_str = locale_str.tr('_', '-').downcase
filename = Rails.root + "lib/javascripts/moment_locale/#{locale_str}.js"
unless File.exists?(filename)
# try the language without the territory
locale_str = locale_str.partition('-').first
filename = Rails.root + "lib/javascripts/moment_locale/#{locale_str}.js"
end
if File.exists?(filename)
File.read(filename) << "\n"
end || ""
end
def self.generate_message_format(message_formats, locale_str)
result = "MessageFormat = {locale: {}};\n"
formats = message_formats.map{|k,v| k.inspect << " : " << compile_message_format(locale_str,v)}.join(", ")
result << "I18n._compiledMFs = {#{formats}};\n\n"
filename = Rails.root + "lib/javascripts/locale/#{locale_str}.js"
filename = Rails.root + "lib/javascripts/locale/en.js" unless File.exists?(filename)
result << File.read(filename) << "\n\n"
result << File.read("#{Rails.root}/lib/javascripts/messageformat-lookup.js")
result
end
@mutex = Mutex.new
def self.with_context
@mutex.synchronize do
yield @ctx ||= begin
ctx = MiniRacer::Context.new
ctx.load(Rails.root + 'lib/javascripts/messageformat.js')
ctx
end
end
end
def self.compile_message_format(locale, format)
with_context do |ctx|
path = Rails.root + "lib/javascripts/locale/#{locale}.js"
ctx.load(path) if File.exists?(path)
ctx.eval("mf = new MessageFormat('#{locale}');")
ctx.eval("mf.precompile(mf.parse(#{format.inspect}))")
end
rescue MiniRacer::EvalError => e
message = "Invalid Format: " << e.message
"function(){ return #{message.inspect};}"
end
def self.strip_out_message_formats!(hash, prefix = "", rval = {})
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if hash.is_a?(Hash)
hash.each do |key, value|
if value.is_a?(Hash)
rval.merge!(strip_out_message_formats!(value, prefix + (prefix.length > 0 ? "." : "") << key, rval))
elsif key.to_s.end_with?("_MF")
rval[prefix + (prefix.length > 0 ? "." : "") << key] = value
hash.delete(key)
end
end
end
rval
end
end