Class: Wareki::Date

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

Overview

Wareki date handling class, main implementation.

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.

Raises:

  • (ArgumentError) 


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# File 'lib/wareki/date.rb', line 87

def initialize(era_name, era_year, month = 1, day = 1, is_leap_month = false)
  raise ArgumentError, "Undefined era '#{era_name}'" if
    era_name.to_s != '' && era_name != '紀元前' && !ERA_BY_NAME[era_name]

  @month = month
  @day = day
  @is_leap_month = is_leap_month
  @era_name = era_name
  @era_year = era_year
  if era_name.to_s == '' || era_name == '西暦'
    @year = @era_year
  elsif era_name.to_s == '紀元前'
    @year = -@era_year
  elsif %w(皇紀 神武天皇即位紀元).include? era_name
    @year = era_year + IMPERIAL_START_YEAR
  else
    @year = ERA_BY_NAME[era_name].year + era_year - 1
  end
end

Instance Attribute Details

#day ⇒ Object

Returns the value of attribute day.



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# File 'lib/wareki/date.rb', line 10

def day
  @day
end

#era_name ⇒ Object

Returns the value of attribute era_name.



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# File 'lib/wareki/date.rb', line 10

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 10

def era_year
  @era_year
end

#month ⇒ Object

Returns the value of attribute month.



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# File 'lib/wareki/date.rb', line 10

def month
  @month
end

#year ⇒ Object

Returns the value of attribute year.



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# File 'lib/wareki/date.rb', line 10

def year
  @year
end

Class Method Details

._check_invalid_date(era, year, month, day) ⇒ Object 



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# File 'lib/wareki/date.rb', line 16

def self._check_invalid_date(era, year, month, day)
  month == 12 or return true
  day > 2 or return true
  (era == '明治' && year == 5 ||
   %w(皇紀 神武天皇即位紀元).member?(era) &&
   year == GREGORIAN_START_YEAR - IMPERIAL_START_YEAR - 1) and
    return false
  true
end

._parse(str) ⇒ Object 



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# File 'lib/wareki/date.rb', line 26

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

  month > 12 || month < 1 and
    raise ArgumentError, "Invalid month: #{str}"

  if match[:day]
    if match[:day] == '晦'
      day = Utils.last_day_of_month(ERA_BY_NAME[era].year + year - 1, month, match[:is_leap])
    else
      day = Kansuji.k2i(match[:day])
    end
  end

  _check_invalid_date(era, year, month, day) or
    raise ArgumentError, "Invaild Date: #{str}"

  {era: era, year: year, month: month, day: day, is_leap: !!match[:is_leap]}
end

.date(date) ⇒ Object 



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# File 'lib/wareki/date.rb', line 79

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 83

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 70

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 65

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 12

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

Instance Method Details

#+(other) ⇒ Object 



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# File 'lib/wareki/date.rb', line 244

def +(other)
  self.class.jd jd + _to_jd_for_calc(other)
end

#-(other) ⇒ Object 



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# File 'lib/wareki/date.rb', line 240

def -(other)
  self.class.jd jd - _to_jd_for_calc(other)
end

#===(other) ⇒ Object 



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# File 'lib/wareki/date.rb', line 231

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 123

def __set_jd(v)
  @jd = v
end

#_to_jd_for_calc(other) ⇒ Object 



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# File 'lib/wareki/date.rb', line 248

def _to_jd_for_calc(other)
  other.class.to_s == 'ActiveSupport::Duration' and
    raise NotImplementedError, 'Date calcration with ActiveSupport::Duration currently is not supported. Please use numeric.'
  other.respond_to?(:to_date) and other = other.to_date
  other.respond_to?(:jd) and other = other.jd
  other
end

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

Returns:

  • (Boolean) 


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# File 'lib/wareki/date.rb', line 219

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

#format(key) ⇒ Object 



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# File 'lib/wareki/date.rb', line 167

def format(key)
  case key.to_sym
  when :e  then era_name
  when :g  then era_name.to_s == '' ? '' : era_year
  when :G  then era_name.to_s == '' ? '' : Kansuji.i2z(era_year)
  when :Gk then era_name.to_s == '' ? '' : Kansuji.i2k(era_year)
  when :GK
    if era_name.to_s == ''
      ''
    elsif era_year == 1
      '元'
    else
      Kansuji.i2k(era_year)
    end
  when :o  then year
  when :O  then Kansuji.i2z(year)
  when :Ok then Kansuji.i2k(year)
  when :i  then imperial_year
  when :I  then Kansuji.i2z(imperial_year)
  when :Ik then Kansuji.i2k(imperial_year)
  when :s  then month
  when :S  then Kansuji.i2z(month)
  when :Sk then Kansuji.i2k(month)
  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 day
  when :D  then Kansuji.i2z(day)
  when :Dk then Kansuji.i2k(day)
  when :DK
    if month == 1 && !leap_month? && day == 1
      '元'
    elsif day == 1
      '朔'
    elsif day == Utils.last_day_of_month(year, month, leap_month?)
      '晦'
    else
      Kansuji.i2k(day)
    end
  when :m  then "#{format(:s)}#{format(:l)}"
  when :M  then "#{format(:Lk)}#{format(:S)}"
  when :Mk then "#{format(:Lk)}#{format(:Sk)}"
  when :y  then "#{format(:e)}#{format(:g)}"
  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)}年#{format(:s)}#{format(:l)}月#{format(:d)}日"
  when :F  then "#{format(:e)}#{format(:GK)}年#{format(:Lk)}#{format(:Sk)}月#{format(:Dk)}日"
  end
end

#imperial_year ⇒ Object 



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# File 'lib/wareki/date.rb', line 107

def imperial_year
  @year - IMPERIAL_START_YEAR
end

#imperial_year=(v) ⇒ Object 



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# File 'lib/wareki/date.rb', line 111

def imperial_year=(v)
  @year = v - IMPERIAL_START_YEAR
end

#jd ⇒ Object 



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# File 'lib/wareki/date.rb', line 138

def jd
  @jd and return @jd

  ['', '西暦', '紀元前'].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

#leap_month=(v) ⇒ Object 



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# File 'lib/wareki/date.rb', line 119

def leap_month=(v)
  @is_leap_month = v
end

#leap_month? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/wareki/date.rb', line 115

def leap_month?
  !!@is_leap_month
end

#month_index ⇒ Object 



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# File 'lib/wareki/date.rb', line 127

def month_index
  return month - 1 if
    ['', '西暦', '紀元前'].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 160

def strftime(format_str = '%JF')
  ret = format_str.to_str.gsub(/%J([fFyYegGoOiImMsSlLdD][kK]?)/) { format($1) || $& }
  ret.index('%') or return ret
  d = to_date
  d.respond_to?(:_wareki_strftime_orig) ? d._wareki_strftime_orig(ret) : d.strftime(ret)
end

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



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# File 'lib/wareki/date.rb', line 152

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

#to_time ⇒ Object 



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# File 'lib/wareki/date.rb', line 156

def to_time
  to_date.to_time
end