Update the express checkout complete respose

Allow to respond with the solidus order on the express checkout
complete action if the solidus_api are enabled.

This is needed since the express callbacks controller create action
updates the Solidus order information and those information
could be useful to update the custom frontend without making
another API call to Solidus.

app/controllers/solidus_afterpay/express_callbacks_controller.rb

@@ -24,7 +24,7 @@ def create
       order.next!
       order.next!
 
-      render json: { redirect_url: checkout_state_url(order.state) }, status: :ok
+      SolidusAfterpay.config.use_solidus_api ? solidus_api_response : solidus_frontend_response
     end
 
     def update
@@ -57,5 +57,17 @@ def order
     def payment_method
       @payment_method ||= SolidusAfterpay::PaymentMethod.active.find(params[:payment_method_id])
     end
+
+    def solidus_api_response
+      respond_with(
+        order.reload,
+        status: :ok,
+        default_template: 'spree/api/orders/show'
+      )
+    end
+
+    def solidus_frontend_response
+      render json: { redirect_url: checkout_state_url(order.state) }, status: :ok
+    end
   end
 end

spec/requests/solidus_afterpay/checkouts_controller_spec.rb

@@ -50,11 +50,11 @@
           end
 
           it 'returns the order_token' do
-            expect(JSON.parse(response.body)['token']).to eq(order_token)
+            expect(json_response['token']).to eq(order_token)
           end
 
           it 'returns the correct params' do
-            expect(JSON.parse(response.body)).to include('token', 'expires', 'redirectCheckoutUrl')
+            expect(json_response).to include('token', 'expires', 'redirectCheckoutUrl')
           end
 
           context 'when no redirect URLs are passed as params' do
@@ -140,7 +140,7 @@
           end
 
           it 'returns a resource not found error message' do
-            expect(JSON.parse(response.body)['error']).to eq('The resource you were looking for could not be found.')
+            expect(json_response['error']).to eq('The resource you were looking for could not be found.')
           end
         end
 
@@ -154,7 +154,7 @@
           end
 
           it 'returns a resource not found error message' do
-            expect(JSON.parse(response.body)['error']).to eq('The resource you were looking for could not be found.')
+            expect(json_response['error']).to eq('The resource you were looking for could not be found.')
           end
         end
 
@@ -202,11 +202,11 @@
           end
 
           it 'returns a resource not found error message' do
-            expect(JSON.parse(response.body)['error']).to eq(gateway_response_message)
+            expect(json_response['error']).to eq(gateway_response_message)
           end
 
           it 'returns the error_code' do
-            expect(JSON.parse(response.body)['errorCode']).to eq(gateway_response_error_code)
+            expect(json_response['errorCode']).to eq(gateway_response_error_code)
           end
         end
       end

spec/requests/solidus_afterpay/express_callbacks_controller_spec.rb

@@ -200,7 +200,11 @@
         end
       end
 
-      context 'when the use solidus api config is set to true', use_solidus_api: true do
+      context(
+        'when the use solidus api config is set to true',
+        use_solidus_api: true,
+        vcr: 'retrieve_configuration/valid'
+      ) do
         context 'when the user is not authorized' do
           it 'returns 401 status code' do
             request
@@ -224,6 +228,16 @@
             request
             expect(response).to have_http_status(:ok)
           end
+
+          # rubocop:disable RSpec/MultipleExpectations
+          it 'returns the order data' do
+            request
+            expect(json_response['id']).to eq(order.id)
+            expect(json_response['number']).to eq(order.number)
+            expect(json_response['state']).to eq('confirm')
+            expect(json_response['payment_methods'].count).to eq(1)
+          end
+          # rubocop:enable RSpec/MultipleExpectations
         end
       end
     end

spec/support/solidus.rb

@@ -1 +1,6 @@
 require 'spree/testing_support/order_walkthrough'
+require 'spree/api/testing_support/helpers'
+
+RSpec.configure do |config|
+  config.include Spree::Api::TestingSupport::Helpers, type: :request
+end