helloworld/vendor/gems/chronic-0.2.2/lib/chronic/ordinal.rb

   1 module Chronic
   2
   3   class Ordinal < Tag #:nodoc:
   4     def self.scan(tokens)
   5       # for each token
   6       tokens.each_index do |i|
   7         if t = self.scan_for_ordinals(tokens[i]) then tokens[i].tag(t) end
   8         if t = self.scan_for_days(tokens[i]) then tokens[i].tag(t) end
   9       end
  10       tokens
  11     end
  12
  13     def self.scan_for_ordinals(token)
  14       if token.word =~ /^(\d*)(st|nd|rd|th)$/
  15         return Ordinal.new($1.to_i)
  16       end
  17       return nil
  18     end
  19
  20     def self.scan_for_days(token)
  21       if token.word =~ /^(\d*)(st|nd|rd|th)$/
  22         unless $1.to_i > 31
  23           return OrdinalDay.new(token.word.to_i)
  24         end
  25       end
  26       return nil
  27     end
  28
  29     def to_s
  30       'ordinal'
  31     end
  32   end
  33
  34   class OrdinalDay < Ordinal #:nodoc:
  35     def to_s
  36       super << '-day-' << @type.to_s
  37     end
  38   end
  39
  40 end