Adding TimeZone#at and DateTime#to_f

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@9042 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

3 files changed, 19 insertions, 3 deletions

diff --git a/activesupport/lib/active_support/core_ext/date_time/conversions.rb b/activesupport/lib/active_support/core_ext/date_time/conversions.rb
index 7e78550f7c..9b6d6e5e90 100644
--- a/activesupport/lib/active_support/core_ext/date_time/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/date_time/conversions.rb
@@ -78,6 +78,12 @@ module ActiveSupport #:nodoc:
         def xmlschema
           strftime("%Y-%m-%dT%H:%M:%S%Z")
         end if RUBY_VERSION < '1.9'
+        
+        # Converts self to a floating-point number of seconds since the Unix epoch 
+        def to_f
+          days_since_unix_epoch = self - ::DateTime.civil(1970)
+          (days_since_unix_epoch * 86_400).to_f
+        end
       end
     end
   end
diff --git a/activesupport/lib/active_support/time_with_zone.rb b/activesupport/lib/active_support/time_with_zone.rb
index 10c3543d6e..ca82c2e004 100644
--- a/activesupport/lib/active_support/time_with_zone.rb
+++ b/activesupport/lib/active_support/time_with_zone.rb
@@ -160,7 +160,7 @@ module ActiveSupport
     end unless RUBY_VERSION < '1.9'
     
     def to_a
-      time.to_a[0, 8].push(dst?, zone)
+      [time.sec, time.min, time.hour, time.day, time.mon, time.year, time.wday, time.yday, dst?, zone]
     end
     
     def to_f
diff --git a/activesupport/lib/active_support/values/time_zone.rb b/activesupport/lib/active_support/values/time_zone.rb
index 401b669a0a..391ebc644e 100644
--- a/activesupport/lib/active_support/values/time_zone.rb
+++ b/activesupport/lib/active_support/values/time_zone.rb
@@ -178,7 +178,7 @@ class TimeZone
   begin # the following methods depend on the tzinfo gem
     require_library_or_gem "tzinfo" unless Object.const_defined?(:TZInfo)
     
-    # Method for creating new ActiveSupport::TimeWithZone instance in time zone of +self+. Example:
+    # Method for creating new ActiveSupport::TimeWithZone instance in time zone of +self+ from given values. Example:
     #
     #   Time.zone = "Hawaii"                      # => "Hawaii"
     #   Time.zone.local(2007, 2, 1, 15, 30, 45)   # => Thu, 01 Feb 2007 15:30:45 HST -10:00
@@ -186,6 +186,16 @@ class TimeZone
       time = Time.utc_time(*args)
       ActiveSupport::TimeWithZone.new(nil, self, time)
     end
+
+    # Method for creating new ActiveSupport::TimeWithZone instance in time zone of +self+ from number of seconds since the Unix epoch. Example:
+    #
+    #   Time.zone = "Hawaii"        # => "Hawaii"
+    #   Time.utc(2000).to_f         # => 946684800.0
+    #   Time.zone.at(946684800.0)   # => Fri, 31 Dec 1999 14:00:00 HST -10:00
+    def at(secs)
+      utc = Time.at(secs).utc rescue DateTime.civil(1970).since(secs)
+      utc.in_time_zone(self)
+    end
     
     # Returns an ActiveSupport::TimeWithZone instance representing the current time
     # in the time zone represented by +self+. Example:
@@ -234,7 +244,7 @@ class TimeZone
     
   rescue LoadError # Tzinfo gem is not available
     # re-raise LoadError only when a tzinfo-dependent method is called:
-    %w(local now today utc_to_local local_to_utc period_for_utc period_for_local tzinfo).each do |method|
+    %w(local at now today utc_to_local local_to_utc period_for_utc period_for_local tzinfo).each do |method|
       define_method(method) {|*args| raise LoadError, "TZInfo gem is required for TimeZone##{method}. `gem install tzinfo` and try again."}
     end
   end