Simple class to return the climacon character for the yahoo weather api code

yahoo_climacon_code.rb

#
# Simple map to return the character required for correct
# climacon based on yahoo weather code.
# https://gist.github.com/rob-murray/4120977
#
# @params {integer} the Yahoo weather code ID
# @returns {string} the Climacon character
#
# @see http://adamwhitcroft.com/climacons/font/,
#   https://developer.yahoo.com/weather/documentation.html#codes
#
# Usage: YahooClimaconCode.new(20).to_s
#
class YahooClimaconCode < Struct.new(:yahoo_code)
  def to_s
    yahoo_code_map.fetch(yahoo_code.to_i, default)
  end

  private

  def default
    ''
  end

  def yahoo_code_map
    {
      0 => '(',
      1 => 'k',
      2 => 'k',
      3 => 'z',
      4 => 'z',
      5 => 'y',
      6 => 'y',
      7 => 'y',
      8 => 'y',
      9 => '9',
      10 => '9',
      11 => '9',
      12 => '9',
      13 => 'o',
      14 => 'o',
      15 => 'o',
      16 => 'o',
      17 => 'y',
      18 => 'e',
      19 => 'g',
      20 => '20',
      21 => '20',
      22 => 's',
      23 => 'k',
      24 => 'k',
      25 => ']',
      26 => '`',
      27 => '2',
      28 => '1',
      29 => '2',
      30 => '1',
      31 => '/',
      32 => 'v',
      33 => '2',
      34 => '1',
      35 => 'y',
      36 => 'E',
      37 => 'z',
      38 => 'z',
      39 => 'z',
      40 => '=',
      41 => 'o',
      42 => 'o',
      43 => 'o',
      44 => '`',
      45 => '=',
      46 => 'e',
      47 => 'z',
      3200 => default
    }
  end
end