google_map_geocoding.rb

require 'json'
require 'net/http'

# usage
#　GoogleMapGeocoding.new.set_store
# class priori


class GoogleMapGeocoding

  GEOCODING_BASE_URL = "https://maps.googleapis.com/maps/api/geocode/json"

  def initialize
    @key = ""
  end

  def search(address)
    url = "#{GEOCODING_BASE_URL}?address=#{URI.encode(address)}&key=#{@key}"
    p url
    res = Net::HTTP.get_response(URI.parse(url))
    status = JSON.parse(res.body)
    if status['status'] == "OK"
      address = status['results'][0]['formatted_address']
      latitude = status['results'][0]['geometry']['location']['lat']
      longitude = status['results'][0]['geometry']['location']['lng']
      return [address, latitude, longitude]
    else
      return false
    end
  end

  def get_address(data)
    prefecture = Prefecture.find(data.prefecture_id)
    "#{prefecture.name}#{data.city_name}#{data.town}"
  end

  def set_retail_store
    Store.all.each do |data|
      address = get_address(data)
      ret_address, latitude, longitude = search(address)
      p address
      p ret_address, latitude, longitude
      data.update_attributes(latitude: latitude.to_f, longitude: longitude.to_f) if ret_address
      sleep 0.1
    end
    return
  end

end