1  # encoding: utf-8
   2  require 'cldr'
   3 
   4  module I18n
   5    module Backend
   6      module Cldr
   7        include ::Cldr::Format
   8 
   9        def localize(locale, object, format = :default, options = {})
  10          options[:as] ||= detect_type(object, options)
  11          send(:"format_#{options[:as]}", locale, object, format, options)
  12        end
  13 
  14        def format_decimal(locale, object, format = :default, options = {})
  15          formatter(locale, :decimal, format).apply(object, options)
  16        end
  17 
  18        def format_integer(locale, object, format = :default, options = {})
  19          format_object(number, options.merge(:precision => 0))
  20        end
  21 
  22        def format_currency(locale, object, format = :default, options = {})
  23          options.merge!(:currency => lookup_currency(locale, options[:currency], object)) if options[:currency].is_a?(Symbol)
  24          formatter(locale, :currency, format).apply(object, options)
  25        end
  26 
  27        def format_percent(locale, object, format = :default, options = {})
  28          formatter(locale, :percent, format).apply(object, options)
  29        end
  30 
  31        def format_date(locale, object, format = :default, options = {})
  32          formatter(locale, :date, format).apply(object, options)
  33        end
  34 
  35        def format_time(locale, object, format = :default, options = {})
  36          formatter(locale, :time, format).apply(object, options)
  37        end
  38 
  39        def format_datetime(locale, object, format = :default, options = {})
  40          key  = :"calendars.gregorian.formats.datetime.#{format}.pattern"
  41          date = I18n.l(object, :format => options[:date_format] || format, :locale => locale, :as => :date)
  42          time = I18n.l(object, :format => options[:time_format] || format, :locale => locale, :as => :time)
  43          I18n.t(key, :date => date, :time => time, :locale => locale, :raise => true)
  44        end
  45 
  46        protected
  47 
  48          def detect_type(object, options)
  49            options.has_key?(:currency) ? :currency : case object
  50            when ::Numeric
  51              :decimal
  52            when ::Date, ::DateTime, ::Time
  53              object.class.name.downcase.to_sym
  54            else
  55              raise_unspecified_format_type!
  56            end
  57          end
  58 
  59          def formatter(locale, type, format)
  60            (@formatters ||= {})[:"#{locale}.#{type}.#{format}"] ||= begin
  61              format = lookup_format(locale, type, format)
  62              data   = lookup_format_data(locale, type)
  63              ::Cldr::Format.const_get(type.to_s.camelize).new(format, data)
  64            end
  65          end
  66 
  67          def lookup_format(locale, type, format)
  68            key = case type
  69            when :date, :time, :datetime
  70              :"calendars.gregorian.formats.#{type}.#{format}.pattern"
  71            else
  72              :"numbers.formats.#{type}.patterns.#{format || :default}"
  73            end
  74            I18n.t(key, :locale => locale, :raise => true)
  75          end
  76 
  77          def lookup_format_data(locale, type)
  78            key = case type
  79            when :date, :time, :datetime
  80              :'calendars.gregorian'
  81            else
  82              :'numbers.symbols'
  83            end
  84            I18n.t(key, :locale => locale, :raise => true)
  85          end
  86 
  87          def lookup_currency(locale, currency, count)
  88            I18n.t(:"currencies.#{currency}", :locale => locale, :count => count)
  89          end
  90 
  91          def raise_unspecified_format_type!
  92            raise ArgumentError.new("You have to specify a format type, e.g. :as => :number.")
  93          end
  94 
  95          def raise_unspecified_currency!
  96            raise ArgumentError.new("You have to specify a currency, e.g. :currency => 'EUR'.")
  97          end
  98      end
  99    end
 100  en