класс Time

# File activesupport/lib/active_support/core_ext/time/acts_like.rb, line 7
def acts_like_time?
  true
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 187
def advance(options)
  unless options[:weeks].nil?
    options[:weeks], partial_weeks = options[:weeks].divmod(1)
    options[:days] = options.fetch(:days, 0) + 7 * partial_weeks
  end

  unless options[:days].nil?
    options[:days], partial_days = options[:days].divmod(1)
    options[:hours] = options.fetch(:hours, 0) + 24 * partial_days
  end

  d = to_date.gregorian.advance(options)
  time_advanced_by_date = change(year: d.year, month: d.month, day: d.day)
  seconds_to_advance = \
    options.fetch(:seconds, 0) +
    options.fetch(:minutes, 0) * 60 +
    options.fetch(:hours, 0) * 3600

  if seconds_to_advance.zero?
    time_advanced_by_date
  else
    time_advanced_by_date.since(seconds_to_advance)
  end
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 213
def ago(seconds)
  since(-seconds)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 226
def beginning_of_day
  change(hour: 0)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 255
def beginning_of_hour
  change(min: 0)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 271
def beginning_of_minute
  change(sec: 0)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 123
def change(options)
  new_year   = options.fetch(:year, year)
  new_month  = options.fetch(:month, month)
  new_day    = options.fetch(:day, day)
  new_hour   = options.fetch(:hour, hour)
  new_min    = options.fetch(:min, options[:hour] ? 0 : min)
  new_sec    = options.fetch(:sec, (options[:hour] || options[:min]) ? 0 : sec)
  new_offset = options.fetch(:offset, nil)

  if new_nsec = options[:nsec]
    raise ArgumentError, "Can't change both :nsec and :usec at the same time: #{options.inspect}" if options[:usec]
    new_usec = Rational(new_nsec, 1000)
  else
    new_usec = options.fetch(:usec, (options[:hour] || options[:min] || options[:sec]) ? 0 : Rational(nsec, 1000))
  end

  raise ArgumentError, "argument out of range" if new_usec >= 1000000

  new_sec += Rational(new_usec, 1000000)

  if new_offset
    ::Time.new(new_year, new_month, new_day, new_hour, new_min, new_sec, new_offset)
  elsif utc?
    ::Time.utc(new_year, new_month, new_day, new_hour, new_min, new_sec)
  elsif zone.respond_to?(:utc_to_local)
    new_time = ::Time.new(new_year, new_month, new_day, new_hour, new_min, new_sec, zone)

    # When there are two occurrences of a nominal time due to DST ending,
    # `Time.new` chooses the first chronological occurrence (the one with a
    # larger UTC offset). However, for `change`, we want to choose the
    # occurrence that matches this time's UTC offset.
    #
    # If the new time's UTC offset is larger than this time's UTC offset, the
    # new time might be a first chronological occurrence. So we add the offset
    # difference to fast-forward the new time, and check if the result has the
    # desired UTC offset (i.e. is the second chronological occurrence).
    offset_difference = new_time.utc_offset - utc_offset
    if offset_difference > 0 && (new_time_2 = new_time + offset_difference).utc_offset == utc_offset
      new_time_2
    else
      new_time
    end
  elsif zone
    ::Time.local(new_sec, new_min, new_hour, new_day, new_month, new_year, nil, nil, isdst, nil)
  else
    ::Time.new(new_year, new_month, new_day, new_hour, new_min, new_sec, utc_offset)
  end
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 317
def compare_with_coercion(other)
  # we're avoiding Time#to_datetime and Time#to_time because they're expensive
  if other.class == Time
    compare_without_coercion(other)
  elsif other.is_a?(Time)
    # also avoid ActiveSupport::TimeWithZone#to_time before Rails 8.0
    if other.respond_to?(:comparable_time)
      compare_without_coercion(other.comparable_time)
    else
      compare_without_coercion(other.to_time)
    end
  else
    to_datetime <=> other
  end
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 244
def end_of_day
  change(
    hour: 23,
    min: 59,
    sec: 59,
    usec: Rational(999999999, 1000)
  )
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 261
def end_of_hour
  change(
    min: 59,
    sec: 59,
    usec: Rational(999999999, 1000)
  )
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 277
def end_of_minute
  change(
    sec: 59,
    usec: Rational(999999999, 1000)
  )
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 337
def eql_with_coercion(other)
  # if other is an ActiveSupport::TimeWithZone, coerce a Time instance from it so we can do eql? comparison
  other = other.comparable_time if other.respond_to?(:comparable_time)
  eql_without_coercion(other)
end

# File activesupport/lib/active_support/core_ext/time/conversions.rb, line 67
def formatted_offset(colon = true, alternate_utc_string = nil)
  utc? && alternate_utc_string || ActiveSupport::TimeZone.seconds_to_utc_offset(utc_offset, colon)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 234
def middle_of_day
  change(hour: 12)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 308
def minus_with_coercion(other)
  other = other.comparable_time if other.respond_to?(:comparable_time)
  other.is_a?(DateTime) ? to_f - other.to_f : minus_without_coercion(other)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 351
def next_day(days = 1)
  advance(days: days)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 361
def next_month(months = 1)
  advance(months: months)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 371
def next_year(years = 1)
  advance(years: years)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 346
def prev_day(days = 1)
  advance(days: -days)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 356
def prev_month(months = 1)
  advance(months: -months)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 366
def prev_year(years = 1)
  advance(years: -years)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 107
def sec_fraction
  subsec
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 91
def seconds_since_midnight
  to_i - change(hour: 0).to_i + (usec / 1.0e+6)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 100
def seconds_until_end_of_day
  end_of_day.to_i - to_i
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 218
def since(seconds)
  self + seconds
rescue
  to_datetime.since(seconds)
end

# File activesupport/lib/active_support/core_ext/time/conversions.rb, line 53
def to_fs(format = :default)
  if formatter = DATE_FORMATS[format]
    formatter.respond_to?(:call) ? formatter.call(self).to_s : strftime(formatter)
  else
    to_s
  end
end

# File activesupport/lib/active_support/core_ext/time/compatibility.rb, line 13
def to_time
  preserve_timezone ? self : getlocal
end