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 162
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 188
def ago(seconds)
  since(-seconds)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 201
def beginning_of_day
  change(hour: 0)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 230
def beginning_of_hour
  change(min: 0)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 246
def beginning_of_minute
  change(sec: 0)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 120
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
    ::Time.local(new_year, new_month, new_day, new_hour, new_min, new_sec)
  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 292
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)
    compare_without_coercion(other.to_time)
  else
    to_datetime <=> other
  end
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 219
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 236
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 252
def end_of_minute
  change(
    sec: 59,
    usec: Rational(999999999, 1000)
  )
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 307
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 66
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 209
def middle_of_day
  change(hour: 12)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 283
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 321
def next_day(days = 1)
  advance(days: days)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 331
def next_month(months = 1)
  advance(months: months)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 341
def next_year(years = 1)
  advance(years: years)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 316
def prev_day(days = 1)
  advance(days: -days)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 326
def prev_month(months = 1)
  advance(months: -months)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 336
def prev_year(years = 1)
  advance(years: -years)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 104
def sec_fraction
  subsec
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 88
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 97
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 193
def since(seconds)
  self + seconds
rescue
  to_datetime.since(seconds)
end

# File activesupport/lib/active_support/core_ext/time/conversions.rb, line 51
def to_formatted_s(format = :default)
  if formatter = DATE_FORMATS[format]
    formatter.respond_to?(:call) ? formatter.call(self).to_s : strftime(formatter)
  else
    to_default_s
  end
end

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