lib/nominatim.rb

   1 module Nominatim
   2   require "timeout"
   3
   4   extend ActionView::Helpers::NumberHelper
   5
   6   def self.describe_location(lat, lon, zoom = nil, language = nil)
   7     zoom ||= 14
   8     language ||= http_accept_language.user_preferred_languages.join(",")
   9
  10     Rails.cache.fetch "/nominatim/location/#{lat}/#{lon}/#{zoom}/#{language}" do
  11       url = "https://nominatim.openstreetmap.org/reverse?lat=#{lat}&lon=#{lon}&zoom=#{zoom}&accept-language=#{language}"
  12
  13       begin
  14         response = Timeout.timeout(4) do
  15           REXML::Document.new(Net::HTTP.get(URI.parse(url)))
  16         end
  17       rescue StandardError
  18         response = nil
  19       end
  20
  21       if response && result = response.get_text("reversegeocode/result")
  22         result.to_s
  23       else
  24         "#{number_with_precision(lat, :precision => 3)}, #{number_with_precision(lon, :precision => 3)}"
  25       end
  26     end
  27   end
  28 end