Conditional resize

resizeable.rb

module Resizeable
  def resize(hash)
    key = hash.keys[0]
    keys = hash[key].keys
    arr = hash[key].values
    val = {}
    keys.each_with_index do |k, i|
      val = val.merge(k => "#{arr[i][0]}x#{arr[i][1]}#")
    end
    return val unless self.send("#{key}?")

    tempfile = self.send(key).queued_for_write[:original]
    unless tempfile.nil?
      geometry = Paperclip::Geometry.from_file(tempfile)
      result = []
      ratio = geometry.width/ geometry.height

      arr.each do |item|
        min_width  = item[0]
        min_height = item[1]


        if ratio > 1
          # Horizontal Image
          result << horizontal(min_width, min_height, ratio)
        else
          # Vertical Image
          result << vertical(min_width, min_height, ratio)
        end
      end
      keys.each_with_index do |k, i|
        val = val.merge(k => result[i])
      end
    end
    val
  end


  def horizontal(min_width, min_height, ratio)
    final_height = min_height
    final_width  = final_height * ratio
    if final_width > min_width
      vertical(min_width, min_height, ratio)
    else
      "#{final_width.round}x#{final_height.round}!"
    end
  end

  def vertical(min_width, min_height, ratio)
    final_width  = min_width
    final_height = final_width / ratio

    if final_height > min_height
      horizontal(min_width, min_height, ratio)
    else
      "#{final_width.round}x#{final_height.round}!"
    end
  end

end