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module ActiveSupport #:nodoc:
module CoreExtensions #:nodoc:
module Date #:nodoc:
# Enables the use of time calculations within Time itself
module Calculations
def self.included(base) #:nodoc:
base.send(:include, ClassMethods)
base.send(:alias_method, :plus_without_duration, :+)
base.send(:alias_method, :+, :plus_with_duration)
base.send(:alias_method, :minus_without_duration, :-)
base.send(:alias_method, :-, :minus_with_duration)
end
module ClassMethods
def plus_with_duration(other) #:nodoc:
if ActiveSupport::Duration === other
other.since(self)
else
plus_without_duration(other)
end
end
def minus_with_duration(other) #:nodoc:
if ActiveSupport::Duration === other
plus_with_duration(-other)
else
minus_without_duration(other)
end
end
# Provides precise Date calculations for years, months, and days. The +options+ parameter takes a hash with
# any of these keys: :months, :days, :years.
def advance(options)
d = ::Date.new(year + (options.delete(:years) || 0), month, day)
d = d >> options.delete(:months) if options[:months]
d = d + options.delete(:days) if options[:days]
d
end
# Returns a new Date where one or more of the elements have been changed according to the +options+ parameter.
#
# Examples:
#
# Date.new(2007, 5, 12).change(:day => 1) # => Date.new(2007, 5, 12)
# Date.new(2007, 5, 12).change(:year => 2005, :month => 1) # => Date.new(2005, 1, 12)
def change(options)
::Date.new(
options[:year] || self.year,
options[:month] || self.month,
options[:day] || options[:mday] || self.day # mday is deprecated
)
end
end
end
end
end
end
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