module ActiveSupport #:nodoc: module CoreExtensions #:nodoc: module Numeric #:nodoc: # Enables the use of time calculations and declarations, like 45.minutes + 2.hours + 4.years. # # These methods use Time#advance for precise date calculations when using from_now, ago, etc. # as well as adding or subtracting their results from a Time object. For example: # # # equivalent to Time.now.advance(:months => 1) # 1.month.from_now # # # equivalent to Time.now.advance(:years => 2) # 2.years.from_now # # # equivalent to Time.now.advance(:months => 4, :years => 5) # (4.months + 5.years).from_now # # While these methods provide precise calculation when used as in the examples above, care # should be taken to note that this is not true if the result of `months', `years', etc is # converted before use: # # # equivalent to 30.days.to_i.from_now # 1.month.to_i.from_now # # # equivalent to 365.25.days.to_f.from_now # 1.year.to_f.from_now # # In such cases, Ruby's core # Date[http://stdlib.rubyonrails.org/libdoc/date/rdoc/index.html] and # Time[http://stdlib.rubyonrails.org/libdoc/time/rdoc/index.html] should be used for precision # date and time arithmetic module Time def seconds ActiveSupport::Duration.new(self, [[:seconds, self]]) end alias :second :seconds def minutes ActiveSupport::Duration.new(self * 60, [[:seconds, self * 60]]) end alias :minute :minutes def hours ActiveSupport::Duration.new(self * 3600, [[:seconds, self * 3600]]) end alias :hour :hours def days ActiveSupport::Duration.new(self * 24.hours, [[:days, self]]) end alias :day :days def weeks ActiveSupport::Duration.new(self * 7.days, [[:days, self * 7]]) end alias :week :weeks def fortnights ActiveSupport::Duration.new(self * 2.weeks, [[:days, self * 14]]) end alias :fortnight :fortnights def months ActiveSupport::Duration.new(self * 30.days, [[:months, self]]) end alias :month :months def years ActiveSupport::Duration.new(self * 365.25.days, [[:years, self]]) end alias :year :years # Reads best without arguments: 10.minutes.ago def ago(time = ::Time.now) time - self end # Reads best with argument: 10.minutes.until(time) alias :until :ago # Reads best with argument: 10.minutes.since(time) def since(time = ::Time.now) time + self end # Reads best without arguments: 10.minutes.from_now alias :from_now :since end end end end