diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/time/zones.rb')
| -rw-r--r-- | activesupport/lib/active_support/core_ext/time/zones.rb | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/time/zones.rb b/activesupport/lib/active_support/core_ext/time/zones.rb new file mode 100644 index 0000000000..563d522d9a --- /dev/null +++ b/activesupport/lib/active_support/core_ext/time/zones.rb @@ -0,0 +1,68 @@ +module ActiveSupport #:nodoc: + module CoreExtensions #:nodoc: + module Time #:nodoc: + # Methods for creating TimeWithZone objects from Time instances + module Zones + + def self.included(base) #:nodoc: + base.extend(ClassMethods) if base == ::Time # i.e., don't include class methods in DateTime + end + + module ClassMethods + attr_reader :zone + + # Sets a global default time zone, separate from the system time zone in ENV['TZ']. + # Accepts either a Rails TimeZone object, a string that identifies a + # Rails TimeZone object (e.g., "Central Time (US & Canada)"), or a TZInfo::Timezone object + # + # Any Time or DateTime object can use this default time zone, via #in_current_time_zone. + # Example: + # + # Time.zone = 'Hawaii' # => 'Hawaii' + # Time.utc(2000).in_current_time_zone # => Fri, 31 Dec 1999 14:00:00 HST -10:00 + def zone=(zone) + @zone = get_zone(zone) + end + + def zone_reset! + @zone = nil + end + + def get_zone(zone) + ::String === zone || ::Numeric === zone ? TimeZone[zone] : zone + end + end + + # Gives the corresponding time in the supplied zone. self is assumed to be in UTC regardless of constructor. + # + # Examples: + # + # t = Time.utc(2000) # => Sat Jan 01 00:00:00 UTC 2000 + # t.in_time_zone('Alaska') # => Fri, 31 Dec 1999 15:00:00 AKST -09:00 + # t.in_time_zone('Hawaii') # => Fri, 31 Dec 1999 14:00:00 HST -10:00 + def in_time_zone(zone) + ActiveSupport::TimeWithZone.new(self, ::Time.get_zone(zone)) + end + + # Returns the simultaneous time in Time.zone + def in_current_time_zone + in_time_zone(::Time.zone) + end + + # Replaces the existing zone; leaves time value intact. Examples: + # + # t = Time.utc(2000) # => Sat Jan 01 00:00:00 UTC 2000 + # t.change_time_zone('Alaska') # => Sat, 01 Jan 2000 00:00:00 AKST -09:00 + # t.change_time_zone('Hawaii') # => Sat, 01 Jan 2000 00:00:00 HST -10:00 + def change_time_zone(zone) + ActiveSupport::TimeWithZone.new(nil, ::Time.get_zone(zone), self) + end + + # Replaces the existing zone to Time.zone; leaves time value intact + def change_time_zone_to_current + change_time_zone(::Time.zone) + end + end + end + end +end
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