make an URL for a geonames location

plugins/GeonamesPlugin.php

@@ -278,4 +278,28 @@ class GeonamesPlugin extends Plugin
 
         return true;
     }
+
+    /**
+     * Human-readable name for a location
+     *
+     * Given a location, we try to retrieve a geonames.org URL.
+     *
+     * @param Location $location Location to get the url for
+     * @param string   &$url     Place to put the url
+     *
+     * @return boolean whether to continue
+     */
+
+    function onLocationUrl($location, &$url)
+    {
+        if ($location->location_ns != self::NAMESPACE) {
+            // It's not one of our IDs... keep processing
+            return true;
+        }
+
+        $url = 'http://www.geonames.org/' . $location->location_id;
+
+        // it's been filled, so don't process further.
+        return false;
+    }
 }