Module: RiCal::PropertyValue::DateTime::AdditiveMethods

Included in:
RiCal::PropertyValue::DateTime
Defined in:
lib/ri_cal/property_value/date_time/additive_methods.rb

Overview

Methods for DateTime which support adding or subtracting another DateTime or Duration

Instance Method Summary collapse

Instance Method Details

#+(duration) ⇒ Object

Return the sum of the receiver and duration

The parameter other duration should be a RiCal::PropertyValue::Duration

The result will be an RiCal::PropertyValue::DateTime



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# File 'lib/ri_cal/property_value/date_time/additive_methods.rb', line 36

def +(duration)
  duration.add_to_date_time_value(self)
end

#-(other) ⇒ Object

Return the difference between the receiver and other

The parameter other should be either a RiCal::PropertyValue::Duration or a RiCal::PropertyValue::DateTime

If other is a Duration, the result will be a DateTime, if it is a DateTime the result will be a Duration



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# File 'lib/ri_cal/property_value/date_time/additive_methods.rb', line 27

def -(other)
  other.subtract_from_date_time_value(self)
end

#add_to_date_time_value(date_time_value) ⇒ Object

Double-dispatch method for addition.

Raises:

  • (ArgumentError) 


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# File 'lib/ri_cal/property_value/date_time/additive_methods.rb', line 18

def add_to_date_time_value(date_time_value) #:nodoc:
  raise ArgumentError.new("Cannot add #{date_time_value} to #{self}")
end

#duration_until(end_time) ⇒ Object

if end_time is nil => nil

otherwise convert end_time to a DateTime and compute the difference



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# File 'lib/ri_cal/property_value/date_time/additive_methods.rb', line 8

def duration_until(end_time) # :nodoc:
  end_time  && RiCal::PropertyValue::Duration.from_datetimes(timezone_finder, to_datetime, end_time.to_datetime)
end

#subtract_from_date_time_value(dtvalue) ⇒ Object

Double-dispatch method for subtraction.



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# File 'lib/ri_cal/property_value/date_time/additive_methods.rb', line 13

def subtract_from_date_time_value(dtvalue) #:nodoc:
  RiCal::PropertyValue::Duration.from_datetimes(timezone_finder, to_datetime,dtvalue.to_datetime)
end