--- /dev/null
+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.extend ClassMethods
+
+ base.instance_eval do
+ alias_method :plus_without_duration, :+
+ alias_method :+, :plus_with_duration
+
+ alias_method :minus_without_duration, :-
+ alias_method :-, :minus_with_duration
+ end
+ end
+
+ module ClassMethods
+ # Returns a new Date representing the date 1 day ago (i.e. yesterday's date).
+ def yesterday
+ ::Date.today.yesterday
+ end
+
+ # Returns a new Date representing the date 1 day after today (i.e. tomorrow's date).
+ def tomorrow
+ ::Date.today.tomorrow
+ end
+
+ # Returns Time.zone.today when config.time_zone is set, otherwise just returns Date.today.
+ def current
+ ::Time.zone_default ? ::Time.zone.today : ::Date.today
+ end
+ end
+
+ # Tells whether the Date object's date lies in the past
+ def past?
+ self < ::Date.current
+ end
+
+ # Tells whether the Date object's date is today
+ def today?
+ self.to_date == ::Date.current # we need the to_date because of DateTime
+ end
+
+ # Tells whether the Date object's date lies in the future
+ def future?
+ self > ::Date.current
+ end
+
+ # Converts Date to a Time (or DateTime if necessary) with the time portion set to the beginning of the day (0:00)
+ # and then subtracts the specified number of seconds
+ def ago(seconds)
+ to_time.since(-seconds)
+ end
+
+ # Converts Date to a Time (or DateTime if necessary) with the time portion set to the beginning of the day (0:00)
+ # and then adds the specified number of seconds
+ def since(seconds)
+ to_time.since(seconds)
+ end
+ alias :in :since
+
+ # Converts Date to a Time (or DateTime if necessary) with the time portion set to the beginning of the day (0:00)
+ def beginning_of_day
+ to_time
+ end
+ alias :midnight :beginning_of_day
+ alias :at_midnight :beginning_of_day
+ alias :at_beginning_of_day :beginning_of_day
+
+ # Converts Date to a Time (or DateTime if necessary) with the time portion set to the end of the day (23:59:59)
+ def end_of_day
+ to_time.end_of_day
+ end
+
+ 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: <tt>:years</tt>, <tt>:months</tt>, <tt>:weeks</tt>, <tt>:days</tt>.
+ def advance(options)
+ d = self
+ d = d >> options.delete(:years) * 12 if options[:years]
+ d = d >> options.delete(:months) if options[:months]
+ d = d + options.delete(:weeks) * 7 if options[:weeks]
+ 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, 1)
+ # 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] || self.day
+ )
+ end
+
+ # Returns a new Date/DateTime representing the time a number of specified months ago
+ def months_ago(months)
+ advance(:months => -months)
+ end
+
+ # Returns a new Date/DateTime representing the time a number of specified months in the future
+ def months_since(months)
+ advance(:months => months)
+ end
+
+ # Returns a new Date/DateTime representing the time a number of specified years ago
+ def years_ago(years)
+ advance(:years => -years)
+ end
+
+ # Returns a new Date/DateTime representing the time a number of specified years in the future
+ def years_since(years)
+ advance(:years => years)
+ end
+
+ # Short-hand for years_ago(1)
+ def last_year
+ years_ago(1)
+ end
+
+ # Short-hand for years_since(1)
+ def next_year
+ years_since(1)
+ end
+
+ # Short-hand for months_ago(1)
+ def last_month
+ months_ago(1)
+ end
+
+ # Short-hand for months_since(1)
+ def next_month
+ months_since(1)
+ end
+
+ # Returns a new Date/DateTime representing the "start" of this week (i.e, Monday; DateTime objects will have time set to 0:00)
+ def beginning_of_week
+ days_to_monday = self.wday!=0 ? self.wday-1 : 6
+ result = self - days_to_monday
+ self.acts_like?(:time) ? result.midnight : result
+ end
+ alias :monday :beginning_of_week
+ alias :at_beginning_of_week :beginning_of_week
+
+ # Returns a new Date/DateTime representing the end of this week (Sunday, DateTime objects will have time set to 23:59:59)
+ def end_of_week
+ days_to_sunday = self.wday!=0 ? 7-self.wday : 0
+ result = self + days_to_sunday.days
+ self.acts_like?(:time) ? result.end_of_day : result
+ end
+ alias :at_end_of_week :end_of_week
+
+ # Returns a new Date/DateTime representing the start of the given day in next week (default is Monday).
+ def next_week(day = :monday)
+ days_into_week = { :monday => 0, :tuesday => 1, :wednesday => 2, :thursday => 3, :friday => 4, :saturday => 5, :sunday => 6}
+ result = (self + 7).beginning_of_week + days_into_week[day]
+ self.acts_like?(:time) ? result.change(:hour => 0) : result
+ end
+
+ # Returns a new ; DateTime objects will have time set to 0:00DateTime representing the start of the month (1st of the month; DateTime objects will have time set to 0:00)
+ def beginning_of_month
+ self.acts_like?(:time) ? change(:day => 1,:hour => 0, :min => 0, :sec => 0) : change(:day => 1)
+ end
+ alias :at_beginning_of_month :beginning_of_month
+
+ # Returns a new Date/DateTime representing the end of the month (last day of the month; DateTime objects will have time set to 0:00)
+ def end_of_month
+ last_day = ::Time.days_in_month( self.month, self.year )
+ self.acts_like?(:time) ? change(:day => last_day, :hour => 23, :min => 59, :sec => 59) : change(:day => last_day)
+ end
+ alias :at_end_of_month :end_of_month
+
+ # Returns a new Date/DateTime representing the start of the quarter (1st of january, april, july, october; DateTime objects will have time set to 0:00)
+ def beginning_of_quarter
+ beginning_of_month.change(:month => [10, 7, 4, 1].detect { |m| m <= self.month })
+ end
+ alias :at_beginning_of_quarter :beginning_of_quarter
+
+ # Returns a new Date/DateTime representing the end of the quarter (last day of march, june, september, december; DateTime objects will have time set to 23:59:59)
+ def end_of_quarter
+ beginning_of_month.change(:month => [3, 6, 9, 12].detect { |m| m >= self.month }).end_of_month
+ end
+ alias :at_end_of_quarter :end_of_quarter
+
+ # Returns a new Date/DateTime representing the start of the year (1st of january; DateTime objects will have time set to 0:00)
+ def beginning_of_year
+ self.acts_like?(:time) ? change(:month => 1, :day => 1, :hour => 0, :min => 0, :sec => 0) : change(:month => 1, :day => 1)
+ end
+ alias :at_beginning_of_year :beginning_of_year
+
+ # Returns a new Time representing the end of the year (31st of december; DateTime objects will have time set to 23:59:59)
+ def end_of_year
+ self.acts_like?(:time) ? change(:month => 12,:day => 31,:hour => 23, :min => 59, :sec => 59) : change(:month => 12, :day => 31)
+ end
+ alias :at_end_of_year :end_of_year
+
+ # Convenience method which returns a new Date/DateTime representing the time 1 day ago
+ def yesterday
+ self - 1
+ end
+
+ # Convenience method which returns a new Date/DateTime representing the time 1 day since the instance time
+ def tomorrow
+ self + 1
+ end
+ end
+ end
+ end
+end
projects / depot.git / blobdiff