gistfile1.txt

def get_phone_listeners(user)
    stations = user.stations
    return nil unless stations.present?
    phone_listeners = NowSession.joins("LEFT JOIN data_gateway ON data_gateway.id=now_session.call_gateway_id").select("now_session.call_ani_e164").where("now_session.call_ani_e164 <> ''").where(call_gateway_id: stations.map(&:id))
  end

  def area_code_for_listener(listener)
    listener[0].slice(0,3) if listener[0].to_s.length == 11 && listener[0].to_s.slice!(0) == "1"
  end

  def group_phone_listeners_by_area_code(phone_list)
    phone_list.map{|p|area_code_for_listener(p)}
  end

  def lat_long_for_listener(listener)
    AreaCodes.where(area_code: listener.area_code).select([:area_code, :lat, :long])  
  end

  def format_phone_listeners_for_gmaps(listeners)
    results = []
    listeners.map do |listener|
      area_code, lat, long = lat_long_for_listener(listener)
      results << {area_code: area_code, lat: lat, long: long}
    end
    return results
  end

  def map_phone_listeners
      format_phone_listeners_for_gmaps(group_phone_listeners_by_area_code(get_phone_listeners(current_user)))
  end