Method: Wareki::Date._parse

Defined in:
lib/wareki/date.rb

._parse(str) ⇒ Object



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# File 'lib/wareki/date.rb', line 27

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])) > 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 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.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