discourse/lib/js_locale_helper.rb

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module JsLocaleHelper
def self.output_locale(locale, translations = nil)
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'].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']
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
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}")
result = "moment.fn.#{name.camelize(:lower)} = function(){ return this.format('#{format}'); };\n"
end
def self.moment_locale(locale_str)
filename = Rails.root + "lib/javascripts/moment_locale/#{locale_str}.js"
if File.exists?(filename)
File.read(filename) << "\n"
end || ""
end
def self.generate_message_format(message_formats, locale_str)
formats = message_formats.map{|k,v| k.inspect << " : " << compile_message_format(locale_str ,v)}.join(" , ")
result = "MessageFormat = {locale: {}};\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"
result << "I18n.messageFormat = (function(formats){
var f = formats;
return function(key, options) {
var fn = f[key];
if(fn){
try {
return fn(options);
} catch(err) {
return err.message;
}
} else {
return 'Missing Key: ' + key
}
return f[key](options);
};
})({#{formats}});"
end
def self.compile_message_format(locale, format)
ctx = V8::Context.new
ctx.load(Rails.root + 'lib/javascripts/messageformat.js')
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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}))")
rescue V8::Error => 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