Class: Wareki::Date

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

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 75

def initialize(era_name, era_year, month = 1, day = 1, is_leap_month = false)
  if era_name.to_s != "" && era_name != "紀元前" && !ERA_BY_NAME[era_name]
    raise ArgumentError, "Undefined era '#{era_name}'"
  end
  @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 == "皇紀" || era_name == "神武天皇即位紀元"
    @year = era_year + IMPERIAL_START_YEAR
  elsif era_name.to_s == "紀元前"
    @year = -@era_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 9

def day
  @day
end

#era_name ⇒ Object

Returns the value of attribute era_name.



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# File 'lib/wareki/date.rb', line 9

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 9

def era_year
  @era_year
end

#jd ⇒ Object (readonly)

Returns the value of attribute jd.



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# File 'lib/wareki/date.rb', line 8

def jd
  @jd
end

#month ⇒ Object

Returns the value of attribute month.



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# File 'lib/wareki/date.rb', line 9

def month
  @month
end

#year ⇒ Object

Returns the value of attribute year.



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# File 'lib/wareki/date.rb', line 9

def year
  @year
end

Class Method Details

._parse(str) ⇒ Object 



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# File 'lib/wareki/date.rb', line 11

def self._parse(str)
  match = REGEX.match(str.to_s.gsub(/[[:space:]]/, ''))
  if !match || !match[:year]
    raise ArgumentError, "Invaild Date: #{str}"
  end
  era = match[:era_name]
  year = Utils.kan_to_i(match[:year])
  month = 1
  day = 1

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

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

  month > 12 || month < 0 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 = Utils.kan_to_i(match[:day])
    end
  end

  if (era == "明治" && year == 5 ||
      era.to_s == "" && year == GREGORIAN_START_YEAR - 1 ||
      (era == "皇紀" || era == "神武天皇即位紀元") &&
      year == GREGORIAN_START_YEAR - IMPERIAL_START_YEAR - 1) &&
      month == 12 && day > 2
    raise ArgumentError, "Invaild Date: #{str}"
  end

  {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 67

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 71

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 58

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 53

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

Instance Method Details

#__set_jd(v) ⇒ Object 



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

def __set_jd(v)
  @jd = v
end

#format(key) ⇒ Object 



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# File 'lib/wareki/date.rb', line 154

def format(key)
  case key.to_sym
  when :e; era_name
  when :g; era_name.to_s == "" ? '' : era_year
  when :G; era_name.to_s == "" ? '' : Utils.i_to_zen(era_year)
  when :Gk; era_name.to_s == "" ? '' : Utils.i_to_kan(era_year)
  when :GK
    if era_name.to_s == ""
      ''
    elsif era_year == 1
      "元"
    else
      Utils.i_to_kan(era_year)
    end
  when :o; year
  when :O; Utils.i_to_zen(year)
  when :Ok; Utils.i_to_kan(year)
  when :i; imperial_year
  when :I; Utils.i_to_zen(imperial_year)
  when :Ik; Utils.i_to_kan(imperial_year)
  when :s; month
  when :S; Utils.i_to_zen(month)
  when :Sk; Utils.i_to_kan(month)
  when :SK; Utils.alt_month_name(month)
  when :l; leap_month? ? "'" : ""
  when :L; leap_month? ? "’" : ""
  when :Lk; leap_month? ? "閏" : ""
  when :d; day
  when :D; Utils.i_to_zen(day)
  when :Dk; Utils.i_to_kan(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
      Utils.i_to_kan(day)
    end
  when :m; "#{format(:s)}#{format(:l)}"
  when :M; "#{format(:Lk)}#{format(:S)}"
  when :Mk; "#{format(:Lk)}#{format(:Sk)}"
  when :y; "#{format(:e)}#{format(:g)}"
  when :Y; "#{format(:e)}#{format(:G)}"
  when :Yk; "#{format(:e)}#{format(:Gk)}"
  when :YK; "#{format(:e)}#{format(:GK)}"
  when :f; "#{format(:e)}#{format(:g)}年#{format(:s)}#{format(:l)}月#{format(:d)}日"
  when :F; "#{format(:e)}#{format(:GK)}年#{format(:Lk)}#{format(:Sk)}月#{format(:Dk)}日"
  else
    nil
  end
end

#imperial_year ⇒ Object 



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

def imperial_year
  @year - IMPERIAL_START_YEAR
end

#imperial_year=(v) ⇒ Object 



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

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

#leap_month=(v) ⇒ Object 



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

def leap_month=(v)
  @is_leap_month = v
end

#leap_month? ⇒ Boolean

Returns:

  • (Boolean) 


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

def leap_month?
  !!@is_leap_month
end

#month_index ⇒ Object 



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

def month_index
  if @era_name == "" || @era_name == "西暦" || @era_name == "紀元前" || @year >= GREGORIAN_START_YEAR
    return month -1
  end

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

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



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# File 'lib/wareki/date.rb', line 147

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 143

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