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 = "#{Settings.nominatim_url}reverse?lat=#{lat}&lon=#{lon}&zoom=#{zoom}&accept-language=#{language}"
  12
  13       begin
  14         response = OSM.http_client.get(URI.parse(url)) do |request|
  15           request.options.timeout = 4
  16         end
  17
  18         results = REXML::Document.new(response.body) if response.success?
  19       rescue StandardError
  20         results = nil
  21       end
  22
  23       if results && result = results.get_text("reversegeocode/result")
  24         result.value
  25       else
  26         "#{number_with_precision(lat, :precision => 3)}, #{number_with_precision(lon, :precision => 3)}"
  27       end
  28     end
  29   end
  30 end