Froze rails gems

[depot.git] / vendor / rails / activesupport / lib / active_support / core_ext / date_time / calculations.rb

diff --git a/vendor/rails/activesupport/lib/active_support/core_ext/date_time/calculations.rb b/vendor/rails/activesupport/lib/active_support/core_ext/date_time/calculations.rb
new file mode 100644 (file)
index 0000000..0099431
--- /dev/null
+++ b/vendor/rails/activesupport/lib/active_support/core_ext/date_time/calculations.rb
@@ -0,0 +1,126 @@
+require 'rational'
+
+module ActiveSupport #:nodoc:
+  module CoreExtensions #:nodoc:
+    module DateTime #:nodoc:
+      # Enables the use of time calculations within DateTime itself
+      module Calculations
+        def self.included(base) #:nodoc:
+          base.extend ClassMethods
+
+          base.class_eval do
+            alias_method :compare_without_coercion, :<=>
+            alias_method :<=>, :compare_with_coercion
+          end
+        end
+
+        module ClassMethods
+          # DateTimes aren't aware of DST rules, so use a consistent non-DST offset when creating a DateTime with an offset in the local zone
+          def local_offset
+            ::Time.local(2007).utc_offset.to_r / 86400
+          end
+
+          def current
+            ::Time.zone_default ? ::Time.zone.now.to_datetime : ::Time.now.to_datetime
+          end
+        end
+
+        # Tells whether the DateTime object's datetime lies in the past
+        def past?
+          self < ::DateTime.current
+        end
+
+        # Tells whether the DateTime object's datetime lies in the future
+        def future?
+          self > ::DateTime.current
+        end
+
+        # Seconds since midnight: DateTime.now.seconds_since_midnight
+        def seconds_since_midnight
+          self.sec + (self.min * 60) + (self.hour * 3600)
+        end
+
+        # Returns a new DateTime where one or more of the elements have been changed according to the +options+ parameter. The time options
+        # (hour, minute, sec) reset cascadingly, so if only the hour is passed, then minute and sec is set to 0. If the hour and
+        # minute is passed, then sec is set to 0.
+        def change(options)
+          ::DateTime.civil(
+            options[:year]  || self.year,
+            options[:month] || self.month,
+            options[:day]   || self.day,
+            options[:hour]  || self.hour,
+            options[:min]   || (options[:hour] ? 0 : self.min),
+            options[:sec]   || ((options[:hour] || options[:min]) ? 0 : self.sec),
+            options[:offset]  || self.offset,
+            options[:start]  || self.start
+          )
+        end
+
+        # Uses Date to provide precise Time 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>, <tt>:hours</tt>,
+        # <tt>:minutes</tt>, <tt>:seconds</tt>.
+        def advance(options)
+          d = to_date.advance(options)
+          datetime_advanced_by_date = change(:year => d.year, :month => d.month, :day => d.day)
+          seconds_to_advance = (options[:seconds] || 0) + (options[:minutes] || 0) * 60 + (options[:hours] || 0) * 3600
+          seconds_to_advance == 0 ? datetime_advanced_by_date : datetime_advanced_by_date.since(seconds_to_advance)
+        end
+
+        # Returns a new DateTime representing the time a number of seconds ago
+        # Do not use this method in combination with x.months, use months_ago instead!
+        def ago(seconds)
+          self.since(-seconds)
+        end
+
+        # Returns a new DateTime representing the time a number of seconds since the instance time
+        # Do not use this method in combination with x.months, use months_since instead!
+        def since(seconds)
+          self + Rational(seconds.round, 86400)
+        end
+        alias :in :since
+
+        # Returns a new DateTime representing the start of the day (0:00)
+        def beginning_of_day
+          change(:hour => 0)
+        end
+        alias :midnight :beginning_of_day
+        alias :at_midnight :beginning_of_day
+        alias :at_beginning_of_day :beginning_of_day
+
+        # Returns a new DateTime representing the end of the day (23:59:59)
+        def end_of_day
+          change(:hour => 23, :min => 59, :sec => 59)
+        end
+
+        # Adjusts DateTime to UTC by adding its offset value; offset is set to 0
+        #
+        # Example:
+        #
+        #   DateTime.civil(2005, 2, 21, 10, 11, 12, Rational(-6, 24))       # => Mon, 21 Feb 2005 10:11:12 -0600
+        #   DateTime.civil(2005, 2, 21, 10, 11, 12, Rational(-6, 24)).utc   # => Mon, 21 Feb 2005 16:11:12 +0000
+        def utc
+          new_offset(0)
+        end
+        alias_method :getutc, :utc
+
+        # Returns true if offset == 0
+        def utc?
+          offset == 0
+        end
+
+        # Returns the offset value in seconds
+        def utc_offset
+          (offset * 86400).to_i
+        end
+
+        # Layers additional behavior on DateTime#<=> so that Time and ActiveSupport::TimeWithZone instances can be compared with a DateTime
+        def compare_with_coercion(other)
+          other = other.comparable_time if other.respond_to?(:comparable_time)
+          other = other.to_datetime unless other.acts_like?(:date)
+          compare_without_coercion(other)
+        end
+      end
+    end
+  end
+end