feat(snjs): add authenticator use cases (#2145)

* feat(snjs): add authenticator use case

* feat(snjs): add use cases for listing, deleting and verifying authenticators

* fix(snjs): spec for deleting authenticator

packages/snjs/lib/Domain/UseCase/DeleteAuthenticator/DeleteAuthenticator.spec.ts

@@ -0,0 +1,41 @@
+import { AuthenticatorClientInterface } from '@standardnotes/services'
+
+import { DeleteAuthenticator } from './DeleteAuthenticator'
+
+describe('DeleteAuthenticator', () => {
+  let authenticatorClient: AuthenticatorClientInterface
+
+  const createUseCase = () => new DeleteAuthenticator(authenticatorClient)
+
+  beforeEach(() => {
+    authenticatorClient = {} as jest.Mocked<AuthenticatorClientInterface>
+    authenticatorClient.delete = jest.fn().mockReturnValue(true)
+  })
+
+  it('should delete authenticator', async () => {
+    const useCase = createUseCase()
+
+    const result = await useCase.execute({ authenticatorId: '00000000-0000-0000-0000-000000000000' })
+
+    expect(result.isFailed()).toBe(false)
+  })
+
+  it('should fail if authenticator id is invalid', async () => {
+    const useCase = createUseCase()
+
+    const result = await useCase.execute({ authenticatorId: 'invalid' })
+
+    expect(result.isFailed()).toBe(true)
+    expect(result.getError()).toBe('Could not delete authenticator: Given value is not a valid uuid: invalid')
+  })
+
+  it('should fail if authenticator client fails to delete authenticator', async () => {
+    authenticatorClient.delete = jest.fn().mockReturnValue(false)
+    const useCase = createUseCase()
+
+    const result = await useCase.execute({ authenticatorId: '00000000-0000-0000-0000-000000000000' })
+
+    expect(result.isFailed()).toBe(true)
+    expect(result.getError()).toBe('Could not delete authenticator')
+  })
+})

packages/snjs/lib/Domain/UseCase/DeleteAuthenticator/DeleteAuthenticator.ts

@@ -0,0 +1,23 @@
+import { AuthenticatorClientInterface } from '@standardnotes/services'
+import { Result, UseCaseInterface, Uuid } from '@standardnotes/domain-core'
+
+import { DeleteAuthenticatorDTO } from './DeleteAuthenticatorDTO'
+
+export class DeleteAuthenticator implements UseCaseInterface<void> {
+  constructor(private authenticatorClient: AuthenticatorClientInterface) {}
+
+  async execute(dto: DeleteAuthenticatorDTO): Promise<Result<void>> {
+    const authenticatorIdOrError = Uuid.create(dto.authenticatorId)
+    if (authenticatorIdOrError.isFailed()) {
+      return Result.fail(`Could not delete authenticator: ${authenticatorIdOrError.getError()}`)
+    }
+    const authenticatorId = authenticatorIdOrError.getValue()
+
+    const result = await this.authenticatorClient.delete(authenticatorId)
+    if (!result) {
+      return Result.fail('Could not delete authenticator')
+    }
+
+    return Result.ok()
+  }
+}

packages/snjs/lib/Domain/UseCase/DeleteAuthenticator/DeleteAuthenticatorDTO.ts

@@ -0,0 +1,3 @@
+export interface DeleteAuthenticatorDTO {
+  authenticatorId: string
+}