fix(transfer-of-machine-ownership): seller cant be buyer (#16130)

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

libs/application/templates/aosh/transfer-of-machine-ownership/src/fields/StopBuyerIfSameAsSeller/index.tsx

@@ -0,0 +1,18 @@
+import { FieldBaseProps } from '@island.is/application/types'
+import { FC } from 'react'
+import { doSellerAndBuyerHaveSameNationalId } from '../../utils'
+
+export const StopBuyerIfSameAsSeller: FC<
+  React.PropsWithChildren<FieldBaseProps>
+> = (props) => {
+  const { application, setBeforeSubmitCallback } = props
+
+  setBeforeSubmitCallback?.(async () => {
+    if (doSellerAndBuyerHaveSameNationalId(application.answers)) {
+      return [false, '']
+    }
+    return [true, null]
+  })
+
+  return <></>
+}

libs/application/templates/aosh/transfer-of-machine-ownership/src/fields/index.ts

@@ -1,3 +1,4 @@
 export { ApplicationStatus } from './ApplicationStatus'
 export { MachinesField } from './MachinesField'
 export { Review } from './Review'
+export { StopBuyerIfSameAsSeller } from './StopBuyerIfSameAsSeller'

libs/application/templates/aosh/transfer-of-machine-ownership/src/forms/TransferOfMachineOwnershipForm/InformationSection/buyerSubSection.ts

@@ -1,12 +1,15 @@
 import {
+  buildAlertMessageField,
+  buildCustomField,
   buildMultiField,
   buildNationalIdWithNameField,
   buildPhoneField,
   buildSubSection,
-  buildSubmitField,
   buildTextField,
 } from '@island.is/application/core'
 import { information } from '../../../lib/messages'
+import { FormValue } from '@island.is/application/types'
+import { doSellerAndBuyerHaveSameNationalId } from '../../../utils'
 
 export const buyerSubSection = buildSubSection({
   id: 'buyer',
@@ -35,6 +38,19 @@ export const buyerSubSection = buildSubSection({
           width: 'half',
           required: true,
         }),
+        buildAlertMessageField({
+          id: 'buyer.alertMessage',
+          alertType: 'warning',
+          title: information.labels.buyer.alertTitle,
+          message: information.labels.buyer.alertMessage,
+          condition: (answer: FormValue) =>
+            doSellerAndBuyerHaveSameNationalId(answer),
+        }),
+        buildCustomField({
+          id: 'buyer.custom',
+          title: '',
+          component: 'StopBuyerIfSameAsSeller',
+        }),
       ],
     }),
   ],

libs/application/templates/aosh/transfer-of-machine-ownership/src/lib/messages/information.ts

@@ -266,6 +266,17 @@ export const information = {
         defaultMessage: 'Staðfesta',
         description: 'Submit button for buyer',
       },
+      alertTitle: {
+        id: 'aosh.tmo.application:information.labels.buyer.alertTitle',
+        defaultMessage: 'Kennitala sú sama og hjá seljanda',
+        description: `Buyer alert title`,
+      },
+      alertMessage: {
+        id: 'aosh.tmo.application:information.labels.buyer.alertMessage',
+        defaultMessage:
+          'Seljandi og kaupandi getur ekki verið sá sami. Vinsamlega skráðu nýja kennitölu.',
+        description: `Buyer alert message`,
+      },
     }),
     buyerOperators: defineMessages({
       title: {

libs/application/templates/aosh/transfer-of-machine-ownership/src/utils/doSellerAndBuyerHaveSameNationalId.ts

@@ -0,0 +1,17 @@
+import { getValueViaPath } from '@island.is/application/core'
+import { FormValue } from '@island.is/application/types'
+
+export const doSellerAndBuyerHaveSameNationalId = (answers: FormValue) => {
+  const buyerNationalId = getValueViaPath(
+    answers,
+    'buyer.nationalId',
+    '',
+  ) as string
+  const sellerNationalId = getValueViaPath(
+    answers,
+    'seller.nationalId',
+    '',
+  ) as string
+
+  return buyerNationalId === sellerNationalId
+}

libs/application/templates/aosh/transfer-of-machine-ownership/src/utils/index.ts

@@ -15,6 +15,7 @@ export { getReviewSteps } from './getReviewSteps'
 export { hasReviewerApproved } from './hasReviewerApproved'
 export { getApproveAnswers } from './getApproveAnswers'
 export { getRejecter } from './getRejecter'
+export { doSellerAndBuyerHaveSameNationalId } from './doSellerAndBuyerHaveSameNationalId'
 
 export const getChargeItemCodes = (
   application: Application<FormValue>,