Active Support 时间带

# File activesupport/lib/active_support/time_with_zone.rb, line 51
def initialize(utc_time, time_zone, local_time = nil, period = nil)
  @utc = utc_time ? transfer_time_values_to_utc_constructor(utc_time) : nil
  @time_zone, @time = time_zone, local_time
  @period = @utc ? period : get_period_and_ensure_valid_local_time(period)
end

# File activesupport/lib/active_support/time_with_zone.rb, line 299
def +(other)
  if duration_of_variable_length?(other)
    method_missing(:+, other)
  else
    result = utc.acts_like?(:date) ? utc.since(other) : utc + other rescue utc.since(other)
    result.in_time_zone(time_zone)
  end
end

# File activesupport/lib/active_support/time_with_zone.rb, line 333
def -(other)
  if other.acts_like?(:time)
    to_time - other.to_time
  elsif duration_of_variable_length?(other)
    method_missing(:-, other)
  else
    result = utc.acts_like?(:date) ? utc.ago(other) : utc - other rescue utc.ago(other)
    result.in_time_zone(time_zone)
  end
end

# File activesupport/lib/active_support/time_with_zone.rb, line 232
def <=>(other)
  utc <=> other
end

# File activesupport/lib/active_support/time_with_zone.rb, line 494
def acts_like_time?
  true
end

# File activesupport/lib/active_support/time_with_zone.rb, line 422
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

# File activesupport/lib/active_support/time_with_zone.rb, line 361
def ago(other)
  since(-other)
end

# File activesupport/lib/active_support/time_with_zone.rb, line 166
def as_json(options = nil)
  if ActiveSupport::JSON::Encoding.use_standard_json_time_format
    xmlschema(ActiveSupport::JSON::Encoding.time_precision)
  else
    %(#{time.strftime("%Y/%m/%d %H:%M:%S")} #{formatted_offset(false)})
  end
end

# File activesupport/lib/active_support/time_with_zone.rb, line 240
def between?(min, max)
  utc.between?(min, max)
end

# File activesupport/lib/active_support/time_with_zone.rb, line 505
def blank?
  false
end

# File activesupport/lib/active_support/time_with_zone.rb, line 382
def change(options)
  if options[:zone] && options[:offset]
    raise ArgumentError, "Can't change both :offset and :zone at the same time: #{options.inspect}"
  end

  new_time = time.change(options)

  if options[:zone]
    new_zone = ::Time.find_zone(options[:zone])
  elsif options[:offset]
    new_zone = ::Time.find_zone(new_time.utc_offset)
  end

  new_zone ||= time_zone
  periods = new_zone.periods_for_local(new_time)

  self.class.new(nil, new_zone, new_time, periods.include?(period) ? period : nil)
end

# File activesupport/lib/active_support/time_with_zone.rb, line 94
def dst?
  period.dst?
end

# File activesupport/lib/active_support/time_with_zone.rb, line 275
def eql?(other)
  other.eql?(utc)
end

# File activesupport/lib/active_support/time_with_zone.rb, line 125
def formatted_offset(colon = true, alternate_utc_string = nil)
  utc? && alternate_utc_string || TimeZone.seconds_to_utc_offset(utc_offset, colon)
end

# File activesupport/lib/active_support/time_with_zone.rb, line 509
def freeze
  # preload instance variables before freezing
  period; utc; time; to_datetime; to_time
  super
end

# File activesupport/lib/active_support/time_with_zone.rb, line 270
def future?
  utc.future?
end

# File activesupport/lib/active_support/time_with_zone.rb, line 279
def hash
  utc.hash
end

# File activesupport/lib/active_support/time_with_zone.rb, line 186
def httpdate
  utc.httpdate
end

# File activesupport/lib/active_support/time_with_zone.rb, line 77
def in_time_zone(new_zone = ::Time.zone)
  return self if time_zone == new_zone
  utc.in_time_zone(new_zone)
end

# File activesupport/lib/active_support/time_with_zone.rb, line 140
def inspect
  "#{time.strftime('%a, %d %b %Y %H:%M:%S.%9N')} #{zone} #{formatted_offset}"
end

# File activesupport/lib/active_support/time_with_zone.rb, line 499
def is_a?(klass)
  klass == ::Time || super
end

# File activesupport/lib/active_support/time_with_zone.rb, line 83
def localtime(utc_offset = nil)
  utc.getlocal(utc_offset)
end

# File activesupport/lib/active_support/time_with_zone.rb, line 515
def marshal_dump
  [utc, time_zone.name, time]
end

# File activesupport/lib/active_support/time_with_zone.rb, line 519
def marshal_load(variables)
  initialize(variables[0].utc, ::Time.find_zone(variables[1]), variables[2].utc)
end

# File activesupport/lib/active_support/time_with_zone.rb, line 540
def method_missing(...)
  wrap_with_time_zone time.__send__(...)
rescue NoMethodError => e
  raise e, e.message.sub(time.inspect, inspect).sub("Time", "ActiveSupport::TimeWithZone"), e.backtrace
end

# File activesupport/lib/active_support/time_with_zone.rb, line 245
def past?
  utc.past?
end

# File activesupport/lib/active_support/time_with_zone.rb, line 72
def period
  @period ||= time_zone.period_for_utc(@utc)
end

# File activesupport/lib/active_support/time_with_zone.rb, line 525
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

# File activesupport/lib/active_support/time_with_zone.rb, line 533
def respond_to_missing?(sym, include_priv)
  return false if sym.to_sym == :acts_like_date?
  time.respond_to?(sym, include_priv)
end

# File activesupport/lib/active_support/time_with_zone.rb, line 194
def rfc2822
  to_fs(:rfc822)
end

# File activesupport/lib/active_support/time_with_zone.rb, line 226
def strftime(format)
  format = format.gsub(/((?:\A|[^%])(?:%%)*)%Z/, "\\1#{zone}")
  getlocal(utc_offset).strftime(format)
end

# File activesupport/lib/active_support/time_with_zone.rb, line 58
def time
  @time ||= incorporate_utc_offset(@utc, utc_offset)
end

# File activesupport/lib/active_support/time_with_zone.rb, line 445
def to_a
  [time.sec, time.min, time.hour, time.day, time.mon, time.year, time.wday, time.yday, dst?, zone]
end

# File activesupport/lib/active_support/time_with_zone.rb, line 478
def to_datetime
  @to_datetime ||= utc.to_datetime.new_offset(Rational(utc_offset, 86_400))
end

# File activesupport/lib/active_support/time_with_zone.rb, line 453
def to_f
  utc.to_f
end

# File activesupport/lib/active_support/time_with_zone.rb, line 212
def to_fs(format = :default)
  if format == :db
    utc.to_fs(format)
  elsif formatter = ::Time::DATE_FORMATS[format]
    formatter.respond_to?(:call) ? formatter.call(self).to_s : strftime(formatter)
  else
    # Change to to_s when deprecation is gone.
    "#{time.strftime("%Y-%m-%d %H:%M:%S")} #{formatted_offset(false, 'UTC')}"
  end
end

# File activesupport/lib/active_support/time_with_zone.rb, line 461
def to_i
  utc.to_i
end

# File activesupport/lib/active_support/time_with_zone.rb, line 470
def to_r
  utc.to_r
end

# File activesupport/lib/active_support/time_with_zone.rb, line 200
def to_s
  "#{time.strftime("%Y-%m-%d %H:%M:%S")} #{formatted_offset(false, 'UTC')}" # mimicking Ruby Time#to_s format
end

# File activesupport/lib/active_support/time_with_zone.rb, line 485
def to_time
  if preserve_timezone
    @to_time_with_instance_offset ||= getlocal(utc_offset)
  else
    @to_time_with_system_offset ||= getlocal
  end
end

# File activesupport/lib/active_support/time_with_zone.rb, line 251
def today?
  time.today?
end

# File activesupport/lib/active_support/time_with_zone.rb, line 257
def tomorrow?
  time.tomorrow?
end

# File activesupport/lib/active_support/time_with_zone.rb, line 63
def utc
  @utc ||= incorporate_utc_offset(@time, -utc_offset)
end

# File activesupport/lib/active_support/time_with_zone.rb, line 105
def utc?
  zone == "UTC" || zone == "UCT"
end

# File activesupport/lib/active_support/time_with_zone.rb, line 111
def utc_offset
  period.observed_utc_offset
end

# File activesupport/lib/active_support/time_with_zone.rb, line 148
def xmlschema(fraction_digits = 0)
  "#{time.strftime(PRECISIONS[fraction_digits.to_i])}#{formatted_offset(true, 'Z')}"
end

# File activesupport/lib/active_support/time_with_zone.rb, line 264
def yesterday?
  time.yesterday?
end

# File activesupport/lib/active_support/time_with_zone.rb, line 133
def zone
  period.abbreviation
end