vendor/plugins/i18n_data/lib/i18n_data/live_data_provider.rb

   1 require 'open-uri'
   2 require 'rexml/document'
   3 gem 'activesupport', '> 2.2'
   4 require 'activesupport'
   5
   6 module I18nData
   7   # fetches data online from debian svn
   8   module LiveDataProvider
   9     extend ActiveSupport::Memoizable
  10     extend self
  11
  12     XML_CODES = {
  13       :countries => 'http://svn.debian.org/viewsvn/*checkout*/pkg-isocodes/trunk/iso-codes/iso_3166/iso_3166.xml',
  14       :languages => 'http://svn.debian.org/viewsvn/*checkout*/pkg-isocodes/trunk/iso-codes/iso_639/iso_639.xml'
  15     }
  16     TRANSLATIONS = {
  17       :languages => 'http://svn.debian.org/viewsvn/*checkout*/pkg-isocodes/trunk/iso-codes/iso_639/',
  18       :countries => 'http://svn.debian.org/viewsvn/*checkout*/pkg-isocodes/trunk/iso-codes/iso_3166/'
  19     }
  20
  21     def codes(type,language_code)
  22       language_code = language_code.upcase
  23       if language_code == 'EN'
  24         send("english_#{type}")
  25       else
  26         translated(type,language_code)
  27       end
  28     end
  29
  30   private
  31
  32     def translate(type,language,to_language_code)
  33       translated = translations(type,to_language_code)[language]
  34       translated.to_s.empty? ? nil : translated
  35     end
  36
  37     def translated(type,language_code)
  38       translations = {}
  39       send("english_#{type}").each do |code,name|
  40         translation = translate(type,name,language_code)
  41         translations[code] = translation ? translation : name
  42       end
  43       translations
  44     end
  45     memoize :translated
  46
  47     def translations(type,language_code)
  48       begin
  49         data = open(TRANSLATIONS[type]+"#{language_code.downcase}.po").readlines
  50       rescue
  51         raise NoTranslationAvailable.new("for #{type} and language code = #{language_code}")
  52       end
  53
  54       po_to_hash(data)
  55     end
  56     memoize :translations
  57
  58     def english_languages
  59       codes = {}
  60       xml(:languages).elements.each('*/iso_639_entry') do |entry|
  61         name = entry.attributes['name'].to_s.gsub("'","\\'")
  62         code = entry.attributes['iso_639_1_code'].to_s.upcase
  63         next if code.empty? or name.empty?
  64         codes[code]=name
  65       end
  66       codes
  67     end
  68     memoize :english_languages
  69
  70     def english_countries
  71       codes = {}
  72       xml(:countries).elements.each('*/iso_3166_entry') do |entry|
  73         name = entry.attributes['name'].to_s.gsub("'","\\'")
  74         code = entry.attributes['alpha_2_code'].to_s.upcase
  75         codes[code]=name
  76       end
  77       codes
  78     end
  79     memoize :english_countries
  80
  81     def po_to_hash(data)
  82       names = data.select{|l| l =~ /^msgid/}.map{|line| line.match(/^msgid "(.*?)"/)[1]}
  83       translations = data.select{|l| l =~ /^msgstr/}.map{|line| line.match(/^msgstr "(.*?)"/)[1]}
  84
  85       translated = {}
  86       names.each_with_index do |name,index|
  87         translated[name]=translations[index]
  88       end
  89       translated
  90     end
  91
  92     def xml(type)
  93       xml = open(XML_CODES[type]).read
  94       REXML::Document.new(xml)
  95     end
  96   end
  97 end