Route: Don't run `#calculate_costs!` on callback if TomTom disabled

We say `TomTom` is disabled when no API key is present. If this is the
case, the `after_save` callback that uses it shouldn't be executed.

I had to change my `API_KEY` constant to an instance variable to be able
to change it for testing.

Refs #6095

1 files changed, 6 insertions, 2 deletions

diff --git a/lib/tom_tom.rb b/lib/tom_tom.rb
index 97f914f28..a1a2bda43 100644
--- a/lib/tom_tom.rb
+++ b/lib/tom_tom.rb
@@ -1,17 +1,21 @@
 module TomTom
   BASE_URL = 'https://api.tomtom.com'
-  API_KEY = Rails.application.secrets.tomtom_api_key
+  @api_key = Rails.application.secrets.tomtom_api_key
 
   @connection = Faraday.new(
     url: BASE_URL,
     params: {
-      key: API_KEY
+      key: @api_key
     }
   ) do |faraday|
     faraday.use FaradayMiddleware::FollowRedirects, limit: 1
     faraday.adapter Faraday.default_adapter
   end
 
+  def self.enabled?
+    @api_key.present?
+  end
+
   def self.batch(way_costs)
     TomTom::Batch.new(@connection).batch(way_costs)
   end