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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_accessor :zone_default
def zone
Thread.current[:time_zone] || zone_default
end
# 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_time_zone.
# Example:
#
# Time.zone = 'Hawaii' # => 'Hawaii'
# Time.utc(2000).in_time_zone # => Fri, 31 Dec 1999 14:00:00 HST -10:00
def zone=(time_zone)
Thread.current[:time_zone] = get_zone(time_zone)
end
# Allows override of Time.zone locally inside supplied block; resets Time.zone to existing value when done
def use_zone(time_zone)
old_zone, ::Time.zone = ::Time.zone, get_zone(time_zone)
yield
ensure
::Time.zone = old_zone
end
private
def get_zone(time_zone)
return time_zone if time_zone.nil? || time_zone.is_a?(TimeZone)
# lookup timezone based on identifier (unless we've been passed a TZInfo::Timezone)
unless time_zone.respond_to?(:period_for_local)
time_zone = TimeZone[time_zone] || TZInfo::Timezone.get(time_zone) rescue nil
end
# Return if a TimeZone instance, or wrap in a TimeZone instance if a TZInfo::Timezone
if time_zone
time_zone.is_a?(TimeZone) ? time_zone : TimeZone.create(time_zone.name, nil, time_zone)
end
end
end
# Returns the simultaneous time in Time.zone.
#
# Time.zone = 'Hawaii' # => 'Hawaii'
# Time.utc(2000).in_time_zone # => Fri, 31 Dec 1999 14:00:00 HST -10:00
#
# This method is similar to Time#localtime, except that it uses Time.zone as the local zone
# instead of the operating system's time zone.
#
# You can also pass in a TimeZone instance or string that identifies a TimeZone as an argument,
# and the conversion will be based on that zone instead of Time.zone.
#
# Time.utc(2000).in_time_zone('Alaska') # => Fri, 31 Dec 1999 15:00:00 AKST -09:00
def in_time_zone(zone = ::Time.zone)
ActiveSupport::TimeWithZone.new(utc? ? self : getutc, ::Time.send!(:get_zone, zone))
end
end
end
end
end
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