Route: Add `#calculate_costs!` to populate `#costs` with `WayCost`s

This new method will launch a worker that takes the route's `StopArea`s,
converts them to `WayCost`s, sends them to the TomTom API to calculate
distance and time costs, and saves those costs to the route's `costs`
field.

Refs #6095

3 files changed, 24 insertions, 0 deletions

diff --git a/app/models/chouette/route.rb b/app/models/chouette/route.rb
index d0d776bc6..a1d44f53f 100644
--- a/app/models/chouette/route.rb
+++ b/app/models/chouette/route.rb
@@ -188,6 +188,10 @@ module Chouette
       journey_pattern
     end
 
+    def calculate_costs!
+      RouteWayCostWorker.perform_async(id)
+    end
+
     protected
 
     def self.vehicle_journeys_timeless(stop_point_id)
diff --git a/app/services/route_way_cost_calculator.rb b/app/services/route_way_cost_calculator.rb
new file mode 100644
index 000000000..2e30c94fc
--- /dev/null
+++ b/app/services/route_way_cost_calculator.rb
@@ -0,0 +1,12 @@
+class RouteWayCostCalculator
+  def initialize(route)
+    @route = route
+  end
+
+  def calculate!
+    way_costs = StopAreasToWayCostsConverter.new(@route.stop_areas).convert
+    way_costs = TomTom.batch(way_costs)
+    way_costs = WayCostCollectionJSONSerializer.dump(way_costs)
+    @route.update(costs: way_costs)
+  end
+end
diff --git a/app/workers/route_way_cost_worker.rb b/app/workers/route_way_cost_worker.rb
new file mode 100644
index 000000000..adb10957b
--- /dev/null
+++ b/app/workers/route_way_cost_worker.rb
@@ -0,0 +1,8 @@
+class RouteWayCostWorker
+  include Sidekiq::Worker
+
+  def perform(route_id)
+    route = Chouette::Route.find(route_id)
+    RouteWayCostCalculator.new(route).calculate!
+  end
+end