Method: NHKore::DatetimeParser.parse_range

Defined in:
lib/nhkore/datetime_parser.rb

.parse_range(value) ⇒ Object 



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# File 'lib/nhkore/datetime_parser.rb', line 73

def self.parse_range(value)
  # Do not use unspace_web_str(), want spaces for formats.
  value = Util.strip_web_str(Util.reduce_space(value))
  values = value.split('...',2)

  return nil if values.empty? # For '' or '...'

  # For '2020...' or '...2020'.
  if value.include?('...')
    # values.length is always 2 because of 2 in split() above.

    # For '2020...'.
    if Util.empty_web_str?(values[1])
      values[1] = :infinity
    # For '...2020'.
    elsif Util.empty_web_str?(values[0])
      values[0] = :infinity
    end
  end

  datetimes = [
    DatetimeParser.new, # "From" date time
    DatetimeParser.new, # "To" date time
  ]

  values.each_with_index do |v,i|
    dt = datetimes[i]

    # Minimum/Maximum date time for '2020...' or '...2020'.
    if v == :infinity
      # "From" date time.
      if i == 0
        dt.min!
      # "To" date time.
      else
        dt.max!
      end
    else
      v = Util.strip_web_str(v)

      FMTS.each_with_index do |fmt,j|
        # If don't do this, "%d" values will be parsed using "%d %H".
        # It seems as though strptime() ignores space.
        raise ArgumentError if fmt.include?(' ') && !v.include?(' ')

        # If don't do this, "%y..." values will be parsed using "%d...".
        raise ArgumentError if fmt.start_with?('%d') && v.split(' ')[0].length > 2

        dt.parse!(v,fmt)

        break # No problem; this format worked
      rescue ArgumentError
        # Out of formats.
        raise if j >= (FMTS.length - 1)
      end
    end
  end

  from = datetimes[0]
  to = datetimes[1]

  from.autofill!(:from,to)
  to.autofill!(:to,from)

  return [from.jst_time,to.jst_time]
end