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module Stamp
module Emitters
class Ordinal
attr_reader :field
# @param [field] the field to be formatted (e.g. +:month+, +:year+)
def initialize(field)
@field = field
end
def format(target)
ordinalize(target.send(field))
end
# Cribbed from ActiveSupport::Inflector
# https://github.com/rails/rails/blob/master/activesupport/lib/active_support/inflector/methods.rb
def ordinalize(number)
number.to_s + if (11..13).include?(number % 100)
'th'
else
case number % 10
when 1; 'st'
when 2; 'nd'
when 3; 'rd'
else 'th'
end
end
end
end
end
end
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