Mhv 65100 add grouping to single rx call (#19931)

* [MHV 65100] added single rx get for grouped medications, subject to grouping feature flag

* [MHV 65100] spec for single grouped medication get request.

* [MHV 65100] addressed rubocop findings.

* [MHV 65100] addressed rubocop findings.

modules/my_health/app/controllers/my_health/v1/prescriptions_controller.rb

@@ -38,10 +38,18 @@ def index
 
       def show
         id = params[:id].try(:to_i)
-        resource = client.get_rx_details(id)
+        resource = if Flipper.enabled?(:mhv_medications_display_grouping)
+                     get_single_rx_from_grouped_list(collection_resource.data, id)
+                   else
+                     client.get_rx_details(id)
+                   end
         raise Common::Exceptions::RecordNotFound, id if resource.blank?
 
-        options = { meta: resource.metadata }
+        options = if Flipper.enabled?(:mhv_medications_display_grouping)
+                    { meta: client.get_rx_details(id).metadata }
+                  else
+                    { meta: resource.metadata }
+                  end
         render json: MyHealth::V1::PrescriptionDetailsSerializer.new(resource, options)
       end
 

modules/my_health/app/helpers/my_health/rx_grouping_helper.rb

@@ -30,6 +30,11 @@ def group_prescriptions(prescriptions)
       grouped_prescriptions
     end
 
+    def get_single_rx_from_grouped_list(prescriptions, id)
+      grouped_list = group_prescriptions(prescriptions)
+      grouped_list.find { |rx| rx['prescription_id'] == id }
+    end
+
     private
 
     def add_solo_med_and_delete(grouped_prescriptions, prescriptions, prescription)

modules/my_health/spec/requests/my_health/v1/prescriptions_spec.rb

@@ -134,6 +134,31 @@
           expect(find_grouped_rx_in_base_list).to be_falsey
         end
 
+        it 'responds to GET #show with a single grouped medication' do
+          prescription_id = '24891624'
+          VCR.use_cassette('rx_client/prescriptions/gets_a_single_grouped_prescription') do
+            get "/my_health/v1/prescriptions/#{prescription_id}"
+          end
+
+          expect(response).to be_successful
+          expect(response.body).to be_a(String)
+          expect(response).to match_response_schema('my_health/prescriptions/v1/prescription_single')
+          data = JSON.parse(response.body)['data']
+          expect(data).to be_truthy
+          expect(data['attributes']['prescription_id']).to eq(prescription_id.to_i)
+        end
+
+        it 'responds to GET #show with record not found when prescription_id is a part of a grouped medication' do
+          prescription_id = '22565799'
+          VCR.use_cassette('rx_client/prescriptions/gets_grouped_med_record_not_found') do
+            get "/my_health/v1/prescriptions/#{prescription_id}"
+          end
+
+          errors = JSON.parse(response.body)['errors'][0]
+          expect(errors).to be_truthy
+          expect(errors['detail']).to eq("The record identified by #{prescription_id} could not be found")
+        end
+
         Flipper.disable('mhv_medications_display_grouping')
       end