586 lines
22 KiB
Ruby
586 lines
22 KiB
Ruby
# frozen_string_literal: true
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require "active_support/duration"
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require "active_support/values/time_zone"
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require "active_support/core_ext/object/acts_like"
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require "active_support/core_ext/date_and_time/compatibility"
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module ActiveSupport
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# A Time-like class that can represent a time in any time zone. Necessary
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# because standard Ruby Time instances are limited to UTC and the
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# system's <tt>ENV['TZ']</tt> zone.
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#
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# You shouldn't ever need to create a TimeWithZone instance directly via +new+.
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# Instead use methods +local+, +parse+, +at+ and +now+ on TimeZone instances,
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# and +in_time_zone+ on Time and DateTime instances.
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#
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# Time.zone = 'Eastern Time (US & Canada)' # => 'Eastern Time (US & Canada)'
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# Time.zone.local(2007, 2, 10, 15, 30, 45) # => Sat, 10 Feb 2007 15:30:45.000000000 EST -05:00
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# Time.zone.parse('2007-02-10 15:30:45') # => Sat, 10 Feb 2007 15:30:45.000000000 EST -05:00
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# Time.zone.at(1171139445) # => Sat, 10 Feb 2007 15:30:45.000000000 EST -05:00
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# Time.zone.now # => Sun, 18 May 2008 13:07:55.754107581 EDT -04:00
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# Time.utc(2007, 2, 10, 20, 30, 45).in_time_zone # => Sat, 10 Feb 2007 15:30:45.000000000 EST -05:00
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#
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# See Time and TimeZone for further documentation of these methods.
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#
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# TimeWithZone instances implement the same API as Ruby Time instances, so
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# that Time and TimeWithZone instances are interchangeable.
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#
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# t = Time.zone.now # => Sun, 18 May 2008 13:27:25.031505668 EDT -04:00
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# t.hour # => 13
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# t.dst? # => true
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# t.utc_offset # => -14400
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# t.zone # => "EDT"
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# t.to_s(:rfc822) # => "Sun, 18 May 2008 13:27:25 -0400"
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# t + 1.day # => Mon, 19 May 2008 13:27:25.031505668 EDT -04:00
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# t.beginning_of_year # => Tue, 01 Jan 2008 00:00:00.000000000 EST -05:00
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# t > Time.utc(1999) # => true
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# t.is_a?(Time) # => true
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# t.is_a?(ActiveSupport::TimeWithZone) # => true
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class TimeWithZone
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# Report class name as 'Time' to thwart type checking.
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def self.name
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"Time"
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end
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PRECISIONS = Hash.new { |h, n| h[n] = "%FT%T.%#{n}N" }
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PRECISIONS[0] = "%FT%T"
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include Comparable, DateAndTime::Compatibility
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attr_reader :time_zone
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def initialize(utc_time, time_zone, local_time = nil, period = nil)
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@utc = utc_time ? transfer_time_values_to_utc_constructor(utc_time) : nil
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@time_zone, @time = time_zone, local_time
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@period = @utc ? period : get_period_and_ensure_valid_local_time(period)
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end
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# Returns a <tt>Time</tt> instance that represents the time in +time_zone+.
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def time
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@time ||= incorporate_utc_offset(@utc, utc_offset)
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end
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# Returns a <tt>Time</tt> instance of the simultaneous time in the UTC timezone.
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def utc
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@utc ||= incorporate_utc_offset(@time, -utc_offset)
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end
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alias_method :comparable_time, :utc
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alias_method :getgm, :utc
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alias_method :getutc, :utc
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alias_method :gmtime, :utc
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# Returns the underlying TZInfo::TimezonePeriod.
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def period
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@period ||= time_zone.period_for_utc(@utc)
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end
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# Returns the simultaneous time in <tt>Time.zone</tt>, or the specified zone.
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def in_time_zone(new_zone = ::Time.zone)
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return self if time_zone == new_zone
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utc.in_time_zone(new_zone)
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end
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# Returns a <tt>Time</tt> instance of the simultaneous time in the system timezone.
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def localtime(utc_offset = nil)
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utc.getlocal(utc_offset)
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end
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alias_method :getlocal, :localtime
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# Returns true if the current time is within Daylight Savings Time for the
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# specified time zone.
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#
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# Time.zone = 'Eastern Time (US & Canada)' # => 'Eastern Time (US & Canada)'
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# Time.zone.parse("2012-5-30").dst? # => true
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# Time.zone.parse("2012-11-30").dst? # => false
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def dst?
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period.dst?
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end
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alias_method :isdst, :dst?
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# Returns true if the current time zone is set to UTC.
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#
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# Time.zone = 'UTC' # => 'UTC'
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# Time.zone.now.utc? # => true
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# Time.zone = 'Eastern Time (US & Canada)' # => 'Eastern Time (US & Canada)'
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# Time.zone.now.utc? # => false
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def utc?
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zone == "UTC" || zone == "UCT"
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end
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alias_method :gmt?, :utc?
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# Returns the offset from current time to UTC time in seconds.
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def utc_offset
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period.observed_utc_offset
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end
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alias_method :gmt_offset, :utc_offset
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alias_method :gmtoff, :utc_offset
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# Returns a formatted string of the offset from UTC, or an alternative
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# string if the time zone is already UTC.
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#
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# Time.zone = 'Eastern Time (US & Canada)' # => "Eastern Time (US & Canada)"
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# Time.zone.now.formatted_offset(true) # => "-05:00"
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# Time.zone.now.formatted_offset(false) # => "-0500"
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# Time.zone = 'UTC' # => "UTC"
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# Time.zone.now.formatted_offset(true, "0") # => "0"
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def formatted_offset(colon = true, alternate_utc_string = nil)
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utc? && alternate_utc_string || TimeZone.seconds_to_utc_offset(utc_offset, colon)
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end
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# Returns the time zone abbreviation.
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#
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# Time.zone = 'Eastern Time (US & Canada)' # => "Eastern Time (US & Canada)"
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# Time.zone.now.zone # => "EST"
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def zone
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period.abbreviation
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end
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# Returns a string of the object's date, time, zone, and offset from UTC.
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#
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# Time.zone.now.inspect # => "Thu, 04 Dec 2014 11:00:25.624541392 EST -05:00"
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def inspect
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"#{time.strftime('%a, %d %b %Y %H:%M:%S.%9N')} #{zone} #{formatted_offset}"
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end
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# Returns a string of the object's date and time in the ISO 8601 standard
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# format.
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#
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# Time.zone.now.xmlschema # => "2014-12-04T11:02:37-05:00"
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def xmlschema(fraction_digits = 0)
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"#{time.strftime(PRECISIONS[fraction_digits.to_i])}#{formatted_offset(true, 'Z')}"
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end
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alias_method :iso8601, :xmlschema
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alias_method :rfc3339, :xmlschema
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# Coerces time to a string for JSON encoding. The default format is ISO 8601.
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# You can get %Y/%m/%d %H:%M:%S +offset style by setting
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# <tt>ActiveSupport::JSON::Encoding.use_standard_json_time_format</tt>
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# to +false+.
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#
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# # With ActiveSupport::JSON::Encoding.use_standard_json_time_format = true
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# Time.utc(2005,2,1,15,15,10).in_time_zone("Hawaii").to_json
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# # => "2005-02-01T05:15:10.000-10:00"
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#
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# # With ActiveSupport::JSON::Encoding.use_standard_json_time_format = false
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# Time.utc(2005,2,1,15,15,10).in_time_zone("Hawaii").to_json
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# # => "2005/02/01 05:15:10 -1000"
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def as_json(options = nil)
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if ActiveSupport::JSON::Encoding.use_standard_json_time_format
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xmlschema(ActiveSupport::JSON::Encoding.time_precision)
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else
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%(#{time.strftime("%Y/%m/%d %H:%M:%S")} #{formatted_offset(false)})
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end
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end
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def init_with(coder) #:nodoc:
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initialize(coder["utc"], coder["zone"], coder["time"])
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end
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def encode_with(coder) #:nodoc:
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coder.tag = "!ruby/object:ActiveSupport::TimeWithZone"
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coder.map = { "utc" => utc, "zone" => time_zone, "time" => time }
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end
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# Returns a string of the object's date and time in the format used by
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# HTTP requests.
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#
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# Time.zone.now.httpdate # => "Tue, 01 Jan 2013 04:39:43 GMT"
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def httpdate
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utc.httpdate
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end
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# Returns a string of the object's date and time in the RFC 2822 standard
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# format.
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#
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# Time.zone.now.rfc2822 # => "Tue, 01 Jan 2013 04:51:39 +0000"
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def rfc2822
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to_s(:rfc822)
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end
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alias_method :rfc822, :rfc2822
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# Returns a string of the object's date and time.
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# Accepts an optional <tt>format</tt>:
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# * <tt>:default</tt> - default value, mimics Ruby Time#to_s format.
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# * <tt>:db</tt> - format outputs time in UTC :db time. See Time#to_formatted_s(:db).
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# * Any key in <tt>Time::DATE_FORMATS</tt> can be used. See active_support/core_ext/time/conversions.rb.
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def to_s(format = :default)
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if format == :db
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utc.to_s(format)
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elsif formatter = ::Time::DATE_FORMATS[format]
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formatter.respond_to?(:call) ? formatter.call(self).to_s : strftime(formatter)
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else
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"#{time.strftime("%Y-%m-%d %H:%M:%S")} #{formatted_offset(false, 'UTC')}" # mimicking Ruby Time#to_s format
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end
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end
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alias_method :to_formatted_s, :to_s
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# Replaces <tt>%Z</tt> directive with +zone before passing to Time#strftime,
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# so that zone information is correct.
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def strftime(format)
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format = format.gsub(/((?:\A|[^%])(?:%%)*)%Z/, "\\1#{zone}")
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getlocal(utc_offset).strftime(format)
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end
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# Use the time in UTC for comparisons.
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def <=>(other)
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utc <=> other
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end
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alias_method :before?, :<
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alias_method :after?, :>
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# Returns true if the current object's time is within the specified
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# +min+ and +max+ time.
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def between?(min, max)
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utc.between?(min, max)
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end
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# Returns true if the current object's time is in the past.
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def past?
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utc.past?
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end
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# Returns true if the current object's time falls within
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# the current day.
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def today?
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time.today?
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end
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# Returns true if the current object's time falls within
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# the next day (tomorrow).
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def tomorrow?
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time.tomorrow?
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end
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alias :next_day? :tomorrow?
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# Returns true if the current object's time falls within
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# the previous day (yesterday).
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def yesterday?
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time.yesterday?
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end
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alias :prev_day? :yesterday?
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# Returns true if the current object's time is in the future.
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def future?
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utc.future?
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end
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# Returns +true+ if +other+ is equal to current object.
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def eql?(other)
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other.eql?(utc)
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end
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def hash
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utc.hash
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end
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# Adds an interval of time to the current object's time and returns that
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# value as a new TimeWithZone object.
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#
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# Time.zone = 'Eastern Time (US & Canada)' # => 'Eastern Time (US & Canada)'
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# now = Time.zone.now # => Sun, 02 Nov 2014 01:26:28.725182881 EDT -04:00
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# now + 1000 # => Sun, 02 Nov 2014 01:43:08.725182881 EDT -04:00
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#
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# If we're adding a Duration of variable length (i.e., years, months, days),
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# move forward from #time, otherwise move forward from #utc, for accuracy
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# when moving across DST boundaries.
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#
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# For instance, a time + 24.hours will advance exactly 24 hours, while a
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# time + 1.day will advance 23-25 hours, depending on the day.
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#
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# now + 24.hours # => Mon, 03 Nov 2014 00:26:28.725182881 EST -05:00
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# now + 1.day # => Mon, 03 Nov 2014 01:26:28.725182881 EST -05:00
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def +(other)
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if duration_of_variable_length?(other)
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method_missing(:+, other)
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else
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result = utc.acts_like?(:date) ? utc.since(other) : utc + other rescue utc.since(other)
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result.in_time_zone(time_zone)
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end
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end
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alias_method :since, :+
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alias_method :in, :+
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# Subtracts an interval of time and returns a new TimeWithZone object unless
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# the other value `acts_like?` time. Then it will return a Float of the difference
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# between the two times that represents the difference between the current
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# object's time and the +other+ time.
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#
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# Time.zone = 'Eastern Time (US & Canada)' # => 'Eastern Time (US & Canada)'
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# now = Time.zone.now # => Mon, 03 Nov 2014 00:26:28.725182881 EST -05:00
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# now - 1000 # => Mon, 03 Nov 2014 00:09:48.725182881 EST -05:00
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#
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# If subtracting a Duration of variable length (i.e., years, months, days),
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# move backward from #time, otherwise move backward from #utc, for accuracy
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# when moving across DST boundaries.
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#
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# For instance, a time - 24.hours will go subtract exactly 24 hours, while a
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# time - 1.day will subtract 23-25 hours, depending on the day.
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#
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# now - 24.hours # => Sun, 02 Nov 2014 01:26:28.725182881 EDT -04:00
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# now - 1.day # => Sun, 02 Nov 2014 00:26:28.725182881 EDT -04:00
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#
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# If both the TimeWithZone object and the other value act like Time, a Float
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# will be returned.
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#
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# Time.zone.now - 1.day.ago # => 86399.999967
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#
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def -(other)
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if other.acts_like?(:time)
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to_time - other.to_time
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elsif duration_of_variable_length?(other)
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method_missing(:-, other)
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else
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result = utc.acts_like?(:date) ? utc.ago(other) : utc - other rescue utc.ago(other)
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result.in_time_zone(time_zone)
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end
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end
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# Subtracts an interval of time from the current object's time and returns
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# the result as a new TimeWithZone object.
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#
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# Time.zone = 'Eastern Time (US & Canada)' # => 'Eastern Time (US & Canada)'
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# now = Time.zone.now # => Mon, 03 Nov 2014 00:26:28.725182881 EST -05:00
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# now.ago(1000) # => Mon, 03 Nov 2014 00:09:48.725182881 EST -05:00
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#
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# If we're subtracting a Duration of variable length (i.e., years, months,
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# days), move backward from #time, otherwise move backward from #utc, for
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# accuracy when moving across DST boundaries.
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#
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# For instance, <tt>time.ago(24.hours)</tt> will move back exactly 24 hours,
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# while <tt>time.ago(1.day)</tt> will move back 23-25 hours, depending on
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# the day.
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#
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# now.ago(24.hours) # => Sun, 02 Nov 2014 01:26:28.725182881 EDT -04:00
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# now.ago(1.day) # => Sun, 02 Nov 2014 00:26:28.725182881 EDT -04:00
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def ago(other)
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since(-other)
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end
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# Returns a new +ActiveSupport::TimeWithZone+ where one or more of the elements have
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# been changed according to the +options+ parameter. The time options (<tt>:hour</tt>,
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# <tt>:min</tt>, <tt>:sec</tt>, <tt>:usec</tt>, <tt>:nsec</tt>) reset cascadingly,
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# so if only the hour is passed, then minute, sec, usec and nsec is set to 0. If the
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# hour and minute is passed, then sec, usec and nsec is set to 0. The +options+
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# parameter takes a hash with any of these keys: <tt>:year</tt>, <tt>:month</tt>,
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# <tt>:day</tt>, <tt>:hour</tt>, <tt>:min</tt>, <tt>:sec</tt>, <tt>:usec</tt>,
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# <tt>:nsec</tt>, <tt>:offset</tt>, <tt>:zone</tt>. Pass either <tt>:usec</tt>
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# or <tt>:nsec</tt>, not both. Similarly, pass either <tt>:zone</tt> or
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# <tt>:offset</tt>, not both.
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#
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# t = Time.zone.now # => Fri, 14 Apr 2017 11:45:15.116992711 EST -05:00
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# t.change(year: 2020) # => Tue, 14 Apr 2020 11:45:15.116992711 EST -05:00
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# t.change(hour: 12) # => Fri, 14 Apr 2017 12:00:00.116992711 EST -05:00
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# t.change(min: 30) # => Fri, 14 Apr 2017 11:30:00.116992711 EST -05:00
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# t.change(offset: "-10:00") # => Fri, 14 Apr 2017 11:45:15.116992711 HST -10:00
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# t.change(zone: "Hawaii") # => Fri, 14 Apr 2017 11:45:15.116992711 HST -10:00
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def change(options)
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if options[:zone] && options[:offset]
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raise ArgumentError, "Can't change both :offset and :zone at the same time: #{options.inspect}"
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end
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new_time = time.change(options)
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if options[:zone]
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new_zone = ::Time.find_zone(options[:zone])
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elsif options[:offset]
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new_zone = ::Time.find_zone(new_time.utc_offset)
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end
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new_zone ||= time_zone
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periods = new_zone.periods_for_local(new_time)
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self.class.new(nil, new_zone, new_time, periods.include?(period) ? period : nil)
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end
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# Uses Date to provide precise Time calculations for years, months, and days
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# according to the proleptic Gregorian calendar. The result is returned as a
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# new TimeWithZone object.
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#
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# The +options+ parameter takes a hash with any of these keys:
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# <tt>:years</tt>, <tt>:months</tt>, <tt>:weeks</tt>, <tt>:days</tt>,
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# <tt>:hours</tt>, <tt>:minutes</tt>, <tt>:seconds</tt>.
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#
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# If advancing by a value of variable length (i.e., years, weeks, months,
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# days), move forward from #time, otherwise move forward from #utc, for
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# accuracy when moving across DST boundaries.
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#
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# Time.zone = 'Eastern Time (US & Canada)' # => 'Eastern Time (US & Canada)'
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# now = Time.zone.now # => Sun, 02 Nov 2014 01:26:28.558049687 EDT -04:00
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# now.advance(seconds: 1) # => Sun, 02 Nov 2014 01:26:29.558049687 EDT -04:00
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# now.advance(minutes: 1) # => Sun, 02 Nov 2014 01:27:28.558049687 EDT -04:00
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# now.advance(hours: 1) # => Sun, 02 Nov 2014 01:26:28.558049687 EST -05:00
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# now.advance(days: 1) # => Mon, 03 Nov 2014 01:26:28.558049687 EST -05:00
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# now.advance(weeks: 1) # => Sun, 09 Nov 2014 01:26:28.558049687 EST -05:00
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# now.advance(months: 1) # => Tue, 02 Dec 2014 01:26:28.558049687 EST -05:00
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# now.advance(years: 1) # => Mon, 02 Nov 2015 01:26:28.558049687 EST -05:00
|
|
def advance(options)
|
|
# If we're advancing a value of variable length (i.e., years, weeks, months, days), advance from #time,
|
|
# otherwise advance from #utc, for accuracy when moving across DST boundaries
|
|
if options.values_at(:years, :weeks, :months, :days).any?
|
|
method_missing(:advance, options)
|
|
else
|
|
utc.advance(options).in_time_zone(time_zone)
|
|
end
|
|
end
|
|
|
|
%w(year mon month day mday wday yday hour min sec usec nsec to_date).each do |method_name|
|
|
class_eval <<-EOV, __FILE__, __LINE__ + 1
|
|
def #{method_name} # def month
|
|
time.#{method_name} # time.month
|
|
end # end
|
|
EOV
|
|
end
|
|
|
|
# Returns Array of parts of Time in sequence of
|
|
# [seconds, minutes, hours, day, month, year, weekday, yearday, dst?, zone].
|
|
#
|
|
# now = Time.zone.now # => Tue, 18 Aug 2015 02:29:27.485278555 UTC +00:00
|
|
# now.to_a # => [27, 29, 2, 18, 8, 2015, 2, 230, false, "UTC"]
|
|
def to_a
|
|
[time.sec, time.min, time.hour, time.day, time.mon, time.year, time.wday, time.yday, dst?, zone]
|
|
end
|
|
|
|
# Returns the object's date and time as a floating point number of seconds
|
|
# since the Epoch (January 1, 1970 00:00 UTC).
|
|
#
|
|
# Time.zone.now.to_f # => 1417709320.285418
|
|
def to_f
|
|
utc.to_f
|
|
end
|
|
|
|
# Returns the object's date and time as an integer number of seconds
|
|
# since the Epoch (January 1, 1970 00:00 UTC).
|
|
#
|
|
# Time.zone.now.to_i # => 1417709320
|
|
def to_i
|
|
utc.to_i
|
|
end
|
|
alias_method :tv_sec, :to_i
|
|
|
|
# Returns the object's date and time as a rational number of seconds
|
|
# since the Epoch (January 1, 1970 00:00 UTC).
|
|
#
|
|
# Time.zone.now.to_r # => (708854548642709/500000)
|
|
def to_r
|
|
utc.to_r
|
|
end
|
|
|
|
# Returns an instance of DateTime with the timezone's UTC offset
|
|
#
|
|
# Time.zone.now.to_datetime # => Tue, 18 Aug 2015 02:32:20 +0000
|
|
# Time.current.in_time_zone('Hawaii').to_datetime # => Mon, 17 Aug 2015 16:32:20 -1000
|
|
def to_datetime
|
|
@to_datetime ||= utc.to_datetime.new_offset(Rational(utc_offset, 86_400))
|
|
end
|
|
|
|
# Returns an instance of +Time+, either with the same UTC offset
|
|
# as +self+ or in the local system timezone depending on the setting
|
|
# of +ActiveSupport.to_time_preserves_timezone+.
|
|
def to_time
|
|
if preserve_timezone
|
|
@to_time_with_instance_offset ||= getlocal(utc_offset)
|
|
else
|
|
@to_time_with_system_offset ||= getlocal
|
|
end
|
|
end
|
|
|
|
# So that +self+ <tt>acts_like?(:time)</tt>.
|
|
def acts_like_time?
|
|
true
|
|
end
|
|
|
|
# Say we're a Time to thwart type checking.
|
|
def is_a?(klass)
|
|
klass == ::Time || super
|
|
end
|
|
alias_method :kind_of?, :is_a?
|
|
|
|
# An instance of ActiveSupport::TimeWithZone is never blank
|
|
def blank?
|
|
false
|
|
end
|
|
|
|
def freeze
|
|
# preload instance variables before freezing
|
|
period; utc; time; to_datetime; to_time
|
|
super
|
|
end
|
|
|
|
def marshal_dump
|
|
[utc, time_zone.name, time]
|
|
end
|
|
|
|
def marshal_load(variables)
|
|
initialize(variables[0].utc, ::Time.find_zone(variables[1]), variables[2].utc)
|
|
end
|
|
|
|
# respond_to_missing? is not called in some cases, such as when type conversion is
|
|
# performed with Kernel#String
|
|
def respond_to?(sym, include_priv = false)
|
|
# ensure that we're not going to throw and rescue from NoMethodError in method_missing which is slow
|
|
return false if sym.to_sym == :to_str
|
|
super
|
|
end
|
|
|
|
# Ensure proxy class responds to all methods that underlying time instance
|
|
# responds to.
|
|
def respond_to_missing?(sym, include_priv)
|
|
return false if sym.to_sym == :acts_like_date?
|
|
time.respond_to?(sym, include_priv)
|
|
end
|
|
|
|
# Send the missing method to +time+ instance, and wrap result in a new
|
|
# TimeWithZone with the existing +time_zone+.
|
|
def method_missing(sym, *args, &block)
|
|
wrap_with_time_zone time.__send__(sym, *args, &block)
|
|
rescue NoMethodError => e
|
|
raise e, e.message.sub(time.inspect, inspect), e.backtrace
|
|
end
|
|
|
|
private
|
|
SECONDS_PER_DAY = 86400
|
|
|
|
def incorporate_utc_offset(time, offset)
|
|
if time.kind_of?(Date)
|
|
time + Rational(offset, SECONDS_PER_DAY)
|
|
else
|
|
time + offset
|
|
end
|
|
end
|
|
|
|
def get_period_and_ensure_valid_local_time(period)
|
|
# we don't want a Time.local instance enforcing its own DST rules as well,
|
|
# so transfer time values to a utc constructor if necessary
|
|
@time = transfer_time_values_to_utc_constructor(@time) unless @time.utc?
|
|
begin
|
|
period || @time_zone.period_for_local(@time)
|
|
rescue ::TZInfo::PeriodNotFound
|
|
# time is in the "spring forward" hour gap, so we're moving the time forward one hour and trying again
|
|
@time += 1.hour
|
|
retry
|
|
end
|
|
end
|
|
|
|
def transfer_time_values_to_utc_constructor(time)
|
|
# avoid creating another Time object if possible
|
|
return time if time.instance_of?(::Time) && time.utc?
|
|
::Time.utc(time.year, time.month, time.day, time.hour, time.min, time.sec + time.subsec)
|
|
end
|
|
|
|
def duration_of_variable_length?(obj)
|
|
ActiveSupport::Duration === obj && obj.parts.any? { |p| [:years, :months, :weeks, :days].include?(p[0]) }
|
|
end
|
|
|
|
def wrap_with_time_zone(time)
|
|
if time.acts_like?(:time)
|
|
periods = time_zone.periods_for_local(time)
|
|
self.class.new(nil, time_zone, time, periods.include?(period) ? period : nil)
|
|
elsif time.is_a?(Range)
|
|
wrap_with_time_zone(time.begin)..wrap_with_time_zone(time.end)
|
|
else
|
|
time
|
|
end
|
|
end
|
|
end
|
|
end
|