Class: Wareki::Date

Inherits:
Object
  • Object
show all
Includes:
Comparable
Defined in:
lib/wareki/date.rb

Overview

Wareki date handling class, main implementation.

Constant Summary collapse

FORMAT_DIRECTIVE_REGEX = 
/%J(-|[_0]{0,2}[0-9]*|)([fFyYegGoOiImMsSlLdD][kK]?)/.freeze
FORMAT_EXPANSION_REGEX = 
/(?<!%)(?:%%)*\K#{FORMAT_DIRECTIVE_REGEX}/.freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(era_name, era_year, month = 1, day = 1, is_leap_month = false) ⇒ Date

Returns a new instance of Date.



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# File 'lib/wareki/date.rb', line 81

def initialize(era_name, era_year, month = 1, day = 1, is_leap_month = false)
  @era_name = era_name.to_s
  @era_year = era_year
  @month = month
  @day = day
  @is_leap_month = is_leap_month
  @year = Utils.era_year_to_civil(@era_name, @era_year)
  _validate_date!
end

Instance Attribute Details

#day ⇒ Object

Returns the value of attribute day.



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# File 'lib/wareki/date.rb', line 13

def day
  @day
end

#era_name ⇒ Object

Returns the value of attribute era_name.



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# File 'lib/wareki/date.rb', line 13

def era_name
  @era_name
end

#era_year ⇒ Object

Returns the value of attribute era_year.



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# File 'lib/wareki/date.rb', line 13

def era_year
  @era_year
end

#month ⇒ Object

Returns the value of attribute month.



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# File 'lib/wareki/date.rb', line 13

def month
  @month
end

#year ⇒ Object

Returns the value of attribute year.



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# File 'lib/wareki/date.rb', line 13

def year
  @year
end

Class Method Details

._parse(str) ⇒ Object 



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# File 'lib/wareki/date.rb', line 19

def self._parse(str)
  str = str.to_s.gsub(/[[:space:]]/, '')
  match = REGEX.match(str)
  (match && !match[0].empty?) or
    raise ArgumentError, "Invaild Date: #{str}"
  era = match[:era_name]
  if (era.nil? || era == '') && match[:year].nil?
    year = Date.today.year
  else
    year = Utils.k2i(match[:year])
    year > 0 or raise ArgumentError, "Invalid year: #{str}"
  end
  month = day = 1

  era.to_s != '' && era.to_s != '紀元前' && !ERA_BY_NAME[era] and
    raise ArgumentError, "Date parse failed: Invalid era name '#{match[:era_name]}'"

  if match[:month]
    month = Utils.k2i(match[:month])
  elsif match[:alt_month]
    month = Utils.alt_month_name_to_i(match[:alt_month])
  end

  month > 12 || month < 1 and
    raise InvalidDate, "invalid date (month out of range): #{str}"

  is_leap = !!(match[:is_leap] || match[:is_leap_post])

  if match[:day]
    if match[:day] == '晦'
      civil_year = Utils.era_year_to_civil(era, year)
      day = Utils.last_day_of_era_month(era, civil_year, month, is_leap)
    else
      day = Utils.k2i(match[:day])
    end
  end

  {era: era, year: year, month: month, day: day, is_leap: is_leap}
end

.date(date) ⇒ Object 



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# File 'lib/wareki/date.rb', line 73

def self.date(date)
  jd(date.jd)
end

.imperial(year, month = 1, day = 1, is_leap_month = false) ⇒ Object 



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# File 'lib/wareki/date.rb', line 77

def self.imperial(year, month = 1, day = 1, is_leap_month = false)
  new('皇紀', year, month, day, is_leap_month)
end

.jd(d) ⇒ Object 



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# File 'lib/wareki/date.rb', line 64

def self.jd(d)
  era = Utils.find_era(d)
  era or raise UnsupportedDateRange, "Cannot find era for date #{d.inspect}"
  year, month, day, is_leap = Utils.find_date_ary(d)
  obj = new(era.name, year - era.year + 1, month, day, is_leap)
  obj.__set_jd(d)
  obj
end

.parse(str) ⇒ Object 



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# File 'lib/wareki/date.rb', line 59

def self.parse(str)
  di = _parse(str)
  new(di[:era], di[:year], di[:month], di[:day], di[:is_leap])
end

.today ⇒ Object 



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# File 'lib/wareki/date.rb', line 15

def self.today
  jd(::Date.today.jd)
end

Instance Method Details

#+(other) ⇒ Object 



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# File 'lib/wareki/date.rb', line 316

def +(other)
  n = _to_days(other)
  n.nil? and raise TypeError, "Cannot add #{other.inspect} to Wareki::Date"
  self.class.jd(jd + n)
end

#-(other) ⇒ Object

Raises:

  • (TypeError) 


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# File 'lib/wareki/date.rb', line 308

def -(other)
  n = _to_days(other)
  n.nil? or return self.class.jd(jd - n)
  ojd = _jd_if_date_like(other)
  ojd and return jd - ojd
  raise TypeError, "Cannot subtract #{other.inspect} from Wareki::Date"
end

#<=>(other) ⇒ Object 



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# File 'lib/wareki/date.rb', line 297

def <=>(other)
  ojd = _jd_if_date_like(other)
  ojd = other if ojd.nil? && other.is_a?(Numeric)
  ojd.nil? and return nil
  jd <=> ojd
end

#===(other) ⇒ Object 



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# File 'lib/wareki/date.rb', line 284

def ===(other)
  begin
    other.jd == jd or return false
  rescue NoMethodError, NotImplementedError
    return false
  end
  true
end

#__set_jd(v) ⇒ Object 



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# File 'lib/wareki/date.rb', line 140

def __set_jd(v)
  @jd = v
end

#_jd_if_date_like(other) ⇒ Object 



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# File 'lib/wareki/date.rb', line 330

def _jd_if_date_like(other)
  return other.jd if other.respond_to?(:jd)

  other.respond_to?(:to_date) && !other.is_a?(Numeric) and other = other.to_date
  other.respond_to?(:jd) ? other.jd : nil
end

#_number_format(opt) ⇒ Object 



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# File 'lib/wareki/date.rb', line 216

def _number_format(opt)
  Utils.number_format(opt)
end

#_to_days(other) ⇒ Object 



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# File 'lib/wareki/date.rb', line 322

def _to_days(other)
  # rubocop:disable Style/ClassEqualityComparison
  return other.in_days if other.class.name == 'ActiveSupport::Duration'
  # rubocop:enable Style/ClassEqualityComparison

  other.is_a?(Numeric) ? other : nil
end

#_validate_date! ⇒ Object 



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# File 'lib/wareki/date.rb', line 159

def _validate_date!
  (month.is_a?(Integer) && month >= 1 && month <= 12) or
    raise InvalidDate, "invalid date (month out of range): #{inspect}"
  (day.is_a?(Integer) && day >= 1) or
    raise InvalidDate, "invalid date (day out of range): #{inspect}"
  if !WESTERN_ERA_NAMES.include?(@era_name) && @year < GREGORIAN_START_YEAR
    # 暦テーブル外の年は従来どおり jd 変換時の UnsupportedDateRange に委ねる
    yobj = YEAR_BY_NUM[@year] or return
    !leap_month? || yobj.leap_month == month or
      raise InvalidDate, "invalid date (no leap month): #{inspect}"
    day <= yobj.month_days[month_index] or
      raise InvalidDate, "invalid date (day out of range): #{inspect}"
  else
    leap_month? and
      raise InvalidDate, "invalid date (no leap month): #{inspect}"
    day <= last_day_of_month or
      raise InvalidDate, "invalid date (day out of range): #{inspect}"
  end
end

#eql?(other) ⇒ Boolean Also known as: ==

Returns:

  • (Boolean) 


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# File 'lib/wareki/date.rb', line 272

def eql?(other)
  begin
    %i[year month day era_year era_name leap_month?].each do |attr|
      other.public_send(attr) == public_send(attr) or return false
    end
  rescue NoMethodError, NotImplementedError
    return false
  end
  true
end

#expand_wareki_format(format_str) ⇒ Object 



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# File 'lib/wareki/date.rb', line 205

def expand_wareki_format(format_str)
  format_str.to_str.gsub(FORMAT_EXPANSION_REGEX) { format($2, $1) || $& }
end

#format(key, opt = '') ⇒ Object 



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# File 'lib/wareki/date.rb', line 220

def format(key, opt = '')
  case key.to_sym
  when :e  then era_name
  when :g  then era_name.to_s == '' ? '' : Kernel.format(_number_format(opt), era_year)
  when :G  then era_name.to_s == '' ? '' : Utils.i2z(era_year)
  when :Gk then era_name.to_s == '' ? '' : YaKansuji.to_kan(era_year, :simple)
  when :GK
    if era_name.to_s == ''
      ''
    elsif era_year == 1
      '元'
    else
      YaKansuji.to_kan(era_year, :simple)
    end
  when :o  then year
  when :O  then Utils.i2z(year)
  when :Ok then YaKansuji.to_kan(year, :simple)
  when :i  then imperial_year
  when :I  then Utils.i2z(imperial_year)
  when :Ik then YaKansuji.to_kan(imperial_year, :simple)
  when :s  then Kernel.format(_number_format(opt), month)
  when :S  then Utils.i2z(month)
  when :Sk then YaKansuji.to_kan(month, :simple)
  when :SK then Utils.alt_month_name(month)
  when :l  then leap_month? ? "'" : ''
  when :L  then leap_month? ? '’' : ''
  when :Lk then leap_month? ? '閏' : ''
  when :d  then Kernel.format(_number_format(opt), day)
  when :D  then Utils.i2z(day)
  when :Dk then YaKansuji.to_kan(day, :simple)
  when :DK
    if month == 1 && !leap_month? && day == 1
      '元'
    elsif day == 1
      '朔'
    elsif day == last_day_of_month
      '晦'
    else
      YaKansuji.to_kan(day, :simple)
    end
  when :m  then "#{format(:s, opt)}#{format(:l)}"
  when :M  then "#{format(:Lk)}#{format(:S)}"
  when :Mk then "#{format(:Lk)}#{format(:Sk)}"
  when :y  then "#{format(:e)}#{format(:g, opt)}"
  when :Y  then "#{format(:e)}#{format(:G)}"
  when :Yk then "#{format(:e)}#{format(:Gk)}"
  when :YK then "#{format(:e)}#{format(:GK)}"
  when :f  then "#{format(:e)}#{format(:g, opt)}年#{format(:s, opt)}#{format(:l)}月#{format(:d, opt)}日"
  when :F  then "#{format(:e)}#{format(:GK)}年#{format(:Lk)}#{format(:Sk)}月#{format(:Dk)}日"
  end
end

#hash ⇒ Object 



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# File 'lib/wareki/date.rb', line 293

def hash
  [self.class, @era_name, @era_year, @year, @month, @day, leap_month?].hash
end

#imperial_year ⇒ Object 



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# File 'lib/wareki/date.rb', line 91

def imperial_year
  @year - IMPERIAL_START_YEAR
end

#imperial_year=(v) ⇒ Object 



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# File 'lib/wareki/date.rb', line 95

def imperial_year=(v)
  self.year = v + IMPERIAL_START_YEAR
end

#jd ⇒ Object 



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# File 'lib/wareki/date.rb', line 179

def jd
  @jd and return @jd

  _validate_date!
  WESTERN_ERA_NAMES.include?(@era_name) and
    return @jd = ::Date.new(@year, month, day, ::Date::ITALY).jd

  @year >= GREGORIAN_START_YEAR and
    return @jd = ::Date.new(@year, month, day, ::Date::GREGORIAN).jd

  yobj = YEAR_BY_NUM[@year] or
    raise UnsupportedDateRange, "Cannot convert to jd #{inspect}"
  @jd = yobj.month_starts[month_index] + day - 1
end

#last_day_of_month ⇒ Object 



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# File 'lib/wareki/date.rb', line 155

def last_day_of_month
  Utils.last_day_of_era_month(@era_name, @year, month, leap_month?)
end

#leap_month=(v) ⇒ Object 



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# File 'lib/wareki/date.rb', line 103

def leap_month=(v)
  @jd = nil
  @is_leap_month = v
end

#leap_month? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/wareki/date.rb', line 99

def leap_month?
  !!@is_leap_month
end

#month_index ⇒ Object 



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# File 'lib/wareki/date.rb', line 144

def month_index
  return month - 1 if
    WESTERN_ERA_NAMES.include?(@era_name) || @year >= GREGORIAN_START_YEAR

  yobj = YEAR_BY_NUM[@year] or
    raise UnsupportedDateRange, "Cannot get year info of #{inspect}"
  idx = month - 1
  idx += 1 if leap_month? || (yobj.leap_month && month > yobj.leap_month)
  idx
end

#strftime(format_str = '%JF') ⇒ Object 



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# File 'lib/wareki/date.rb', line 209

def strftime(format_str = '%JF')
  ret = expand_wareki_format(format_str)
  ret.index('%') or return ret
  d = to_date
  d.respond_to?(:_wareki_strftime_orig) ? d._wareki_strftime_orig(ret) : d.strftime(ret)
end

#succ ⇒ Object 



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# File 'lib/wareki/date.rb', line 304

def succ
  self + 1
end

#to_date(start = ::Date::ITALY) ⇒ Object 



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# File 'lib/wareki/date.rb', line 194

def to_date(start = ::Date::ITALY)
  ::Date.jd(jd, start)
end

#to_time ⇒ Object 



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# File 'lib/wareki/date.rb', line 198

def to_time
  to_date.to_time
end