Testing

google_image.rb

#require 'open-uri'

class GoogleImage < ActiveRecord::Base

  API_FIELDS = %w{lat lng size markers sensor zoom center format maptype language mobile}
  API_URL = "http://maps.google.com/maps/api/staticmap?"

  has_attached_file :image, :storage => :s3, :s3_credentials => "#{Rails.root.to_s}/config/s3.yml"

  def self.send_image_for_params(params)
    gi = GoogleImage.send(method_for_params(params),*arguments_for_params(params))
    gi.download_image unless gi.image_file_name
    gi.image.url
  end

  def self.method_for_params(params)
    base = "find_or_create_by_"
    base += valid_params(params).keys.join("_and_")
    base
  end

  def self.arguments_for_params(params)
    valid_params(params).values.map{|i| i.gsub("|","%7C")}
  end

  def build_url
    params = build_params
    url_query = params_for_url(params)
    "#{API_URL}#{url_query}".force_encoding("UTF-8")
  end

  def params_for_url(params)
    params.join("&")
  end

  def self.valid_params(params)
    params.select{|k,v| API_FIELDS.include? k.to_s }
  end

  def build_params
    params = API_FIELDS.map do |field|
      "#{field}=#{self.send(field)}" if self.send(field)
    end
    params.compact!
  end

  def download_image
    puts build_url
    logger.info build_url
    self.image = URLTempfile.new(build_url) #open(build_url, 'User-Agent' => 'ruby')
    self.save!
  rescue Exception => ex
    logger.info ex.message
    logger.info ex.backtrace
  end

  # def self.build_from_params(params)
  #   API_FIELDS.each do |field|
  #     self.send("#{field}=",params[field]) if params[field]
  #   end
  # end

end