636 check for existing wallet

src/components/CreateWallet.test.tsx

@@ -13,6 +13,7 @@ jest.mock('../libs/JmWalletApi', () => ({
   getGetinfo: jest.fn(),
   getSession: jest.fn(),
   postWalletCreate: jest.fn(),
+  getWalletAll: jest.fn(),
 }))
 
 const NOOP = () => {}
@@ -38,6 +39,7 @@ describe('<CreateWallet />', () => {
     const neverResolvingPromise = new Promise(() => {})
     ;(apiMock.getGetinfo as jest.Mock).mockReturnValue(neverResolvingPromise)
     ;(apiMock.getSession as jest.Mock).mockReturnValue(neverResolvingPromise)
+    ;(apiMock.getWalletAll as jest.Mock).mockReturnValue(neverResolvingPromise)
   })
 
   it('should display alert when rescanning is active', async () => {
@@ -87,6 +89,26 @@ describe('<CreateWallet />', () => {
     expect(await screen.findByText('create_wallet.feedback_invalid_password_confirm')).toBeVisible()
   })
 
+  it('should show validation message to user if duplicate wallet name', async () => {
+    ;(apiMock.getWalletAll as jest.Mock).mockReturnValue(
+      Promise.resolve({
+        ok: true,
+        json: () => Promise.resolve({ wallets: [`${testWalletName}.jmdat`] }),
+      }),
+    )
+    setup({})
+
+    expect(await screen.queryByText('create_wallet.feedback_wallet_name_already_exists')).not.toBeInTheDocument()
+
+    await user.type(screen.getByPlaceholderText('create_wallet.placeholder_wallet_name'), testWalletName)
+    await user.type(screen.getByPlaceholderText('create_wallet.placeholder_password'), testWalletPassword)
+    await user.type(screen.getByPlaceholderText('create_wallet.placeholder_password_confirm'), testWalletPassword)
+
+    await user.click(screen.getByText('create_wallet.button_create'))
+
+    expect(await screen.findByText('create_wallet.feedback_wallet_name_already_exists')).toBeVisible()
+  })
+
   it('should not submit form if wallet name contains invalid characters', async () => {
     setup({})
 

src/components/WalletCreationForm.tsx

@@ -1,10 +1,11 @@
-import { useCallback } from 'react'
+import { useCallback, useEffect, useState } from 'react'
 import * as rb from 'react-bootstrap'
 import { useTranslation } from 'react-i18next'
 import { Formik, FormikErrors } from 'formik'
 import Sprite from './Sprite'
 import { JM_WALLET_FILE_EXTENSION, sanitizeWalletName } from '../utils'
 import styles from './WalletCreationForm.module.css'
+import * as Api from '../libs/JmWalletApi'
 
 export interface CreateWalletFormValues {
   walletName: string
@@ -36,14 +37,34 @@ const WalletCreationForm = ({
   onCancel,
   onSubmit,
 }: WalletCreationFormProps) => {
+  const [walletList, setWalletList] = useState<Api.WalletFileName[] | null>(null)
   const { t, i18n } = useTranslation()
 
+  useEffect(() => {
+    const abortCtrl = new AbortController()
+
+    Api.getWalletAll({ signal: abortCtrl.signal })
+      .then((res) => (res.ok ? res.json() : Api.Helper.throwError(res, t('wallets.error_loading_failed'))))
+      .then((data) => {
+        if (abortCtrl.signal.aborted) return
+        setWalletList(data.wallets)
+      })
+      .catch(() => {
+        // do nothing on purpose
+      })
+
+    return () => abortCtrl.abort()
+  }, [t])
+
   const validate = useCallback(
     (values: CreateWalletFormValues) => {
       const errors = {} as FormikErrors<CreateWalletFormValues>
       if (!values.walletName || !validateWalletName(values.walletName)) {
         errors.walletName = t('create_wallet.feedback_invalid_wallet_name')
       }
+      if (walletList && walletList.includes(`${values.walletName}.jmdat`)) {
+        errors.walletName = t('create_wallet.feedback_wallet_name_already_exists')
+      }
       if (!values.password) {
         errors.password = t('create_wallet.feedback_invalid_password')
       }
@@ -52,7 +73,7 @@ const WalletCreationForm = ({
       }
       return errors
     },
-    [t],
+    [t, walletList],
   )
 
   return (

src/i18n/locales/en/translation.json

@@ -131,6 +131,7 @@
     "label_wallet_name": "Wallet name",
     "placeholder_wallet_name": "Your Wallet...",
     "feedback_invalid_wallet_name": "Please choose a valid wallet name: Use only letters, numbers, underscores or hyphens.",
+    "feedback_wallet_name_already_exists": "Please choose another wallet name. This one is already in use.",
     "label_password": "Password to unlock the wallet",
     "placeholder_password": "Choose a secure password...",
     "feedback_invalid_password": "Please set a password.",