Add controls & validation for Rtn req setup page (#758)

https://eaflood.atlassian.net/browse/WATER-4267

This change adds controls and validation for the setup page.

Depending on which control is chosen, the user will be redirected to a different follow up page.

If nothing is selected the user is presented with a validation warning.

app/controllers/return-requirements.controller.js

@@ -294,7 +294,7 @@ async function submitSetup (request, h) {
     return h.view('return-requirements/setup.njk', pageData)
   }
 
-  return h.redirect(`/system/return-requirements/${sessionId}/purpose`)
+  return h.redirect(`/system/return-requirements/${sessionId}/${pageData.redirect}`)
 }
 
 async function submitSiteDescription (request, h) {

app/services/return-requirements/submit-setup.service.js

@@ -16,7 +16,7 @@ const SetupValidator = require('../../validators/return-requirements/setup.valid
  *
  * The validation result is then combined with the output of the presenter to generate the page data needed by the view.
  * If there was a validation error the controller will re-render the page so needs this information. If all is well the
- * controller will redirect to the next page in the journey.
+ * controller will redirect to the next page in the journey depending on which radio item was chosen.
  *
  * @param {string} sessionId - The id of the current session
  * @param {Object} payload - The submitted form data
@@ -34,10 +34,25 @@ async function go (sessionId, payload) {
     activeNavBar: 'search',
     error: validationResult,
     pageTitle: 'How do you want to set up the return requirement?',
+    redirect: _redirect(payload.setup),
     ...formattedData
   }
 }
 
+function _redirect (setup) {
+  let endpoint
+
+  if (setup === 'use_abstraction_data') {
+    endpoint = 'check-your-answers'
+  }
+
+  if (setup === 'set_up_manually') {
+    endpoint = 'purpose'
+  }
+
+  return endpoint
+}
+
 function _validate (payload) {
   const validation = SetupValidator.go(payload)
 

app/validators/return-requirements/setup.validator.js

@@ -9,7 +9,7 @@ const Joi = require('joi')
 
 const VALID_VALUES = [
   'use_abstraction_data',
-  'copy_an_existing_return_requirement'
+  'set_up_manually'
 ]
 
 /**

app/views/return-requirements/setup.njk

@@ -48,8 +48,11 @@
             checked: false
           },
           {
-            value: "copy_an_existing_return_requirement",
-            text: "Copy an existing return requirement",
+            divider: "or"
+          },
+          {
+            value: "set_up_manually",
+            text: "Set up manually",
             checked: false
           }
         ]

test/services/return-requirements/submit-setup.service.test.js

@@ -56,8 +56,9 @@ describe('Submit Setup service', () => {
         expect(result).to.equal({
           activeNavBar: 'search',
           error: null,
+          licenceRef: '01/ABC',
           pageTitle: 'How do you want to set up the return requirement?',
-          licenceRef: '01/ABC'
+          redirect: 'check-your-answers'
         }, { skip: ['id'] })
       })
     })
@@ -79,8 +80,9 @@ describe('Submit Setup service', () => {
 
           expect(result).to.equal({
             activeNavBar: 'search',
+            licenceRef: '01/ABC',
             pageTitle: 'How do you want to set up the return requirement?',
-            licenceRef: '01/ABC'
+            redirect: undefined
           }, { skip: ['id', 'error'] })
         })
 
@@ -94,4 +96,32 @@ describe('Submit Setup service', () => {
       })
     })
   })
+
+  describe('with different setups', () => {
+    describe('and setup is use_abstraction_data', () => {
+      beforeEach(() => {
+        payload = {
+          setup: 'use_abstraction_data'
+        }
+      })
+
+      it('redirects to the check your answers page', async () => {
+        const result = await SubmitSetupService.go(session.id, payload)
+        expect(result.redirect).to.equal('check-your-answers')
+      })
+    })
+
+    describe('and setup is set_up_manually', () => {
+      beforeEach(() => {
+        payload = {
+          setup: 'set_up_manually'
+        }
+      })
+
+      it('redirects to the purpose page', async () => {
+        const result = await SubmitSetupService.go(session.id, payload)
+        expect(result.redirect).to.equal('purpose')
+      })
+    })
+  })
 })