--- /dev/null
+module ActiveSupport #:nodoc:
+ module CoreExtensions #:nodoc:
+ module Date #:nodoc:
+ # Converting dates to formatted strings, times, and datetimes.
+ module Conversions
+ DATE_FORMATS = {
+ :short => "%e %b",
+ :long => "%B %e, %Y",
+ :db => "%Y-%m-%d",
+ :number => "%Y%m%d",
+ :long_ordinal => lambda { |date| date.strftime("%B #{date.day.ordinalize}, %Y") }, # => "April 25th, 2007"
+ :rfc822 => "%e %b %Y"
+ }
+
+ def self.included(base) #:nodoc:
+ base.instance_eval do
+ alias_method :to_default_s, :to_s
+ alias_method :to_s, :to_formatted_s
+ alias_method :default_inspect, :inspect
+ alias_method :inspect, :readable_inspect
+
+ # Ruby 1.9 has Date#to_time which converts to localtime only.
+ remove_method :to_time if base.instance_methods.include?(:to_time)
+
+ # Ruby 1.9 has Date#xmlschema which converts to a string without the time component.
+ remove_method :xmlschema if base.instance_methods.include?(:xmlschema)
+ end
+ end
+
+ # Convert to a formatted string. See DATE_FORMATS for predefined formats.
+ #
+ # This method is aliased to <tt>to_s</tt>.
+ #
+ # ==== Examples:
+ # date = Date.new(2007, 11, 10) # => Sat, 10 Nov 2007
+ #
+ # date.to_formatted_s(:db) # => "2007-11-10"
+ # date.to_s(:db) # => "2007-11-10"
+ #
+ # date.to_formatted_s(:short) # => "10 Nov"
+ # date.to_formatted_s(:long) # => "November 10, 2007"
+ # date.to_formatted_s(:long_ordinal) # => "November 10th, 2007"
+ # date.to_formatted_s(:rfc822) # => "10 Nov 2007"
+ #
+ # == Adding your own time formats to to_formatted_s
+ # You can add your own formats to the Date::DATE_FORMATS hash.
+ # Use the format name as the hash key and either a strftime string
+ # or Proc instance that takes a date argument as the value.
+ #
+ # # config/initializers/time_formats.rb
+ # Date::DATE_FORMATS[:month_and_year] = "%B %Y"
+ # Date::DATE_FORMATS[:short_ordinal] = lambda { |date| date.strftime("%B #{date.day.ordinalize}") }
+ def to_formatted_s(format = :default)
+ if formatter = DATE_FORMATS[format]
+ if formatter.respond_to?(:call)
+ formatter.call(self).to_s
+ else
+ strftime(formatter)
+ end
+ else
+ to_default_s
+ end
+ end
+
+ # Overrides the default inspect method with a human readable one, e.g., "Mon, 21 Feb 2005"
+ def readable_inspect
+ strftime("%a, %d %b %Y")
+ end
+
+ # A method to keep Time, Date and DateTime instances interchangeable on conversions.
+ # In this case, it simply returns +self+.
+ def to_date
+ self
+ end if RUBY_VERSION < '1.9'
+
+ # Converts a Date instance to a Time, where the time is set to the beginning of the day.
+ # The timezone can be either :local or :utc (default :local).
+ #
+ # ==== Examples:
+ # date = Date.new(2007, 11, 10) # => Sat, 10 Nov 2007
+ #
+ # date.to_time # => Sat Nov 10 00:00:00 0800 2007
+ # date.to_time(:local) # => Sat Nov 10 00:00:00 0800 2007
+ #
+ # date.to_time(:utc) # => Sat Nov 10 00:00:00 UTC 2007
+ def to_time(form = :local)
+ ::Time.send("#{form}_time", year, month, day)
+ end
+
+ # Converts a Date instance to a DateTime, where the time is set to the beginning of the day
+ # and UTC offset is set to 0.
+ #
+ # ==== Example:
+ # date = Date.new(2007, 11, 10) # => Sat, 10 Nov 2007
+ #
+ # date.to_datetime # => Sat, 10 Nov 2007 00:00:00 0000
+ def to_datetime
+ ::DateTime.civil(year, month, day, 0, 0, 0, 0)
+ end if RUBY_VERSION < '1.9'
+
+ def xmlschema
+ to_time.xmlschema
+ end
+ end
+ end
+ end
+end