3 files changed, 56 insertions, 1 deletions
diff --git a/app/views/routes/costs.rabl b/app/views/routes/costs.rabl
index d4465d03e..2c336fb51 100644
--- a/app/views/routes/costs.rabl
+++ b/app/views/routes/costs.rabl
@@ -1,2 +1,4 @@
 object @route
-attributes :costs
+node :costs do
+  RouteWayCostJSONSerializer.dump(@route.costs)
+end
diff --git a/lib/route_way_cost_json_serializer.rb b/lib/route_way_cost_json_serializer.rb
new file mode 100644
index 000000000..20b3d6ee2
--- /dev/null
+++ b/lib/route_way_cost_json_serializer.rb
@@ -0,0 +1,22 @@
+class RouteWayCostJSONSerializer
+  def self.dump(way_costs)
+    return if way_costs.nil?
+
+    way_costs.each do |_, costs|
+      costs['distance'] = self.meters_to_kilometers(costs['distance'])
+      costs['time'] = self.seconds_to_minutes(costs['time'])
+    end
+
+    JSON.dump(way_costs)
+  end
+
+  private
+
+  def self.meters_to_kilometers(num)
+    num / 1000.0
+  end
+
+  def self.seconds_to_minutes(num)
+    num / 60
+  end
+end
diff --git a/spec/lib/route_way_cost_json_serializer_spec.rb b/spec/lib/route_way_cost_json_serializer_spec.rb
new file mode 100644
index 000000000..52cb21afc
--- /dev/null
+++ b/spec/lib/route_way_cost_json_serializer_spec.rb
@@ -0,0 +1,31 @@
+RSpec.describe RouteWayCostJSONSerializer do
+  describe ".dump" do
+    it "converts distance from meters to km and time from seconds to minutes" do
+      costs = {
+        '1-2': {
+          'distance' => 35223,
+          'time' => 5604
+        },
+        '94435-97513' => {
+          'distance' => 35919,
+          'time' => 6174
+        }
+      }
+
+      expect(
+        RouteWayCostJSONSerializer.dump(costs)
+      ).to eq(<<-JSON.delete(" \n"))
+        {
+          "1-2": {
+            "distance": 35.223,
+            "time": 93
+          },
+          "94435-97513": {
+            "distance": 35.919,
+            "time": 102
+          }
+        }
+      JSON
+    end
+  end
+end