FEATURE: Return geoname IDs from MaxMindDb (#16082)

The geoname IDs can be used by plugins to locate the user more precisely.

lib/discourse_ip_info.rb

@@ -101,6 +101,13 @@ class DiscourseIpInfo
           ret[:latitude] = result.location.latitude
           ret[:longitude] = result.location.longitude
           ret[:location] = ret.values_at(:city, :region, :country).reject(&:blank?).uniq.join(", ")
+
+          # used by plugins or API to locate users more accurate
+          ret[:geoname_ids] = [
+            result.continent.geoname_id, result.country.geoname_id, result.city.geoname_id,
+            *result.subdivisions.map(&:geoname_id)
+          ]
+          ret[:geoname_ids].compact!
         end
       rescue => e
         Discourse.warn_exception(e, message: "IP #{ip} could not be looked up in MaxMind GeoLite2-City database.")

spec/requests/admin/users_controller_spec.rb

@@ -993,6 +993,7 @@ RSpec.describe Admin::UsersController do
         city: "London",
         country: "United Kingdom",
         country_code: "GB",
+        geoname_ids: [6255148, 2635167, 2643743, 6269131],
         hostname: "ip-81-2-69-142.example.com",
         location: "London, England, United Kingdom",
         region: "England",