# frozen_string_literal: true module DateAndTime module Zones # Returns the simultaneous time in Time.zone if a zone is given or # if Time.zone_default is set. Otherwise, it returns the current time. # # Time.zone = 'Hawaii' # => 'Hawaii' # Time.utc(2000).in_time_zone # => Fri, 31 Dec 1999 14:00:00 HST -10:00 # Date.new(2000).in_time_zone # => Sat, 01 Jan 2000 00:00:00 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 # Date.new(2000).in_time_zone('Alaska') # => Sat, 01 Jan 2000 00:00:00 AKST -09:00 def in_time_zone(zone = ::Time.zone) time_zone = ::Time.find_zone! zone time = acts_like?(:time) ? self : nil if time_zone time_with_zone(time, time_zone) else time || to_time end end private def time_with_zone(time, zone) if time ActiveSupport::TimeWithZone.new(time.utc? ? time : time.getutc, zone) else ActiveSupport::TimeWithZone.new(nil, zone, to_time(:utc)) end end end end