feat(snjs): add revisions api v2 (#2154)

* feat(snjs): add revisions api v2

* fix(snjs): reference listing and getting revisions in specs

* fix(snjs): revisions specs

* fix(web): usage of revision metadata

* fix(snjs): add specs for decryption revision

* fix(snjs): issue with building mocked specs

* fix(snjs): adjust revision creation delay

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

@@ -0,0 +1,158 @@
+import { EncryptedPayloadInterface, HistoryEntry } from '@standardnotes/models'
+import { EncryptionProviderInterface } from '@standardnotes/encryption'
+import { RevisionClientInterface } from '@standardnotes/services'
+jest.mock('@standardnotes/models', () => {
+  const original = jest.requireActual('@standardnotes/models')
+
+  return {
+    ...original,
+    isRemotePayloadAllowed: jest.fn(),
+  }
+})
+const isRemotePayloadAllowed = require('@standardnotes/models').isRemotePayloadAllowed
+
+import { Revision } from '../../Revision/Revision'
+
+import { GetRevision } from './GetRevision'
+
+describe('GetRevision', () => {
+  let revisionManager: RevisionClientInterface
+  let protocolService: EncryptionProviderInterface
+
+  const createUseCase = () => new GetRevision(revisionManager, protocolService)
+
+  beforeEach(() => {
+    revisionManager = {} as jest.Mocked<RevisionClientInterface>
+    revisionManager.getRevision = jest.fn().mockReturnValue({
+      uuid: '00000000-0000-0000-0000-000000000000',
+      item_uuid: '00000000-0000-0000-0000-000000000000',
+      content: '004:foobar',
+      content_type: 'Note',
+      items_key_id: 'foobar',
+      enc_item_key: 'foobar',
+      auth_hash: 'foobar',
+      created_at: '2021-01-01T00:00:00.000Z',
+      updated_at: '2021-01-01T00:00:00.000Z'
+    } as jest.Mocked<Revision>)
+
+    protocolService = {} as jest.Mocked<EncryptionProviderInterface>
+    protocolService.getEmbeddedPayloadAuthenticatedData = jest.fn().mockReturnValue({ u: '00000000-0000-0000-0000-000000000000' })
+    const encryptedPayload = {
+      content: 'foobar',
+    } as jest.Mocked<EncryptedPayloadInterface>
+    encryptedPayload.copy = jest.fn().mockReturnValue(encryptedPayload)
+    protocolService.decryptSplitSingle = jest.fn().mockReturnValue(encryptedPayload)
+
+    isRemotePayloadAllowed.mockImplementation(() => true)
+  })
+
+  it('should get revision', async () => {
+    const useCase = createUseCase()
+
+    const result = await useCase.execute({
+      itemUuid: '00000000-0000-0000-0000-000000000000',
+      revisionUuid: '00000000-0000-0000-0000-000000000000',
+    })
+
+    expect(result.isFailed()).toBe(false)
+    expect(result.getValue()).toBeInstanceOf(HistoryEntry)
+  })
+
+  it('it should get a revision without uuid from embedded params', async () => {
+    protocolService.getEmbeddedPayloadAuthenticatedData = jest.fn().mockReturnValue({ u: undefined })
+
+    const useCase = createUseCase()
+
+    const result = await useCase.execute({
+      itemUuid: '00000000-0000-0000-0000-000000000000',
+      revisionUuid: '00000000-0000-0000-0000-000000000000',
+    })
+
+    expect(result.isFailed()).toBe(false)
+    expect(result.getValue()).toBeInstanceOf(HistoryEntry)
+  })
+
+  it('it should get a revision without embedded params', async () => {
+    protocolService.getEmbeddedPayloadAuthenticatedData = jest.fn().mockReturnValue(undefined)
+
+    const useCase = createUseCase()
+
+    const result = await useCase.execute({
+      itemUuid: '00000000-0000-0000-0000-000000000000',
+      revisionUuid: '00000000-0000-0000-0000-000000000000',
+    })
+
+    expect(result.isFailed()).toBe(false)
+    expect(result.getValue()).toBeInstanceOf(HistoryEntry)
+  })
+
+  it('should fail if item uuid is invalid', async () => {
+    const useCase = createUseCase()
+
+    const result = await useCase.execute({
+      itemUuid: 'invalid',
+      revisionUuid: '00000000-0000-0000-0000-000000000000',
+    })
+
+    expect(result.isFailed()).toBe(true)
+    expect(result.getError()).toEqual('Could not get revision: Given value is not a valid uuid: invalid')
+  })
+
+  it('should fail if revision uuid is invalid', async () => {
+    const useCase = createUseCase()
+
+    const result = await useCase.execute({
+      itemUuid: '00000000-0000-0000-0000-000000000000',
+      revisionUuid: 'invalid',
+    })
+
+    expect(result.isFailed()).toBe(true)
+    expect(result.getError()).toEqual('Could not get revision: Given value is not a valid uuid: invalid')
+  })
+
+  it('should fail if revision is not found', async () => {
+    revisionManager.getRevision = jest.fn().mockReturnValue(null)
+
+    const useCase = createUseCase()
+
+    const result = await useCase.execute({
+      itemUuid: '00000000-0000-0000-0000-000000000000',
+      revisionUuid: '00000000-0000-0000-0000-000000000000',
+    })
+
+    expect(result.isFailed()).toBe(true)
+    expect(result.getError()).toEqual('Could not get revision: Revision not found')
+  })
+
+  it('should fail if there is an error in decrypting the revision', async () => {
+    const encryptedPayload = {
+      content: 'foobar',
+      errorDecrypting: true,
+    } as jest.Mocked<EncryptedPayloadInterface>
+    encryptedPayload.copy = jest.fn().mockReturnValue(encryptedPayload)
+    protocolService.decryptSplitSingle = jest.fn().mockReturnValue(encryptedPayload)
+
+    const useCase = createUseCase()
+
+    const result = await useCase.execute({
+      itemUuid: '00000000-0000-0000-0000-000000000000',
+      revisionUuid: '00000000-0000-0000-0000-000000000000',
+    })
+
+    expect(result.isFailed()).toBe(true)
+    expect(result.getError()).toEqual('Could not decrypt revision.')
+  })
+
+  it('should fail if remote payload is not allowed', async () => {
+    isRemotePayloadAllowed.mockImplementation(() => false)
+
+    const useCase = createUseCase()
+
+    const result = await useCase.execute({
+      itemUuid: '00000000-0000-0000-0000-000000000000',
+      revisionUuid: '00000000-0000-0000-0000-000000000000',
+    })
+
+    expect(result.isFailed()).toBe(true)
+  })
+})

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

@@ -0,0 +1,80 @@
+import { RevisionClientInterface } from '@standardnotes/services'
+import { Result, UseCaseInterface, Uuid } from '@standardnotes/domain-core'
+import {
+  EncryptedPayload,
+  HistoryEntry,
+  isErrorDecryptingPayload,
+  isRemotePayloadAllowed,
+  NoteContent,
+  PayloadTimestampDefaults,
+} from '@standardnotes/models'
+import { ContentType } from '@standardnotes/common'
+import { EncryptionProviderInterface } from '@standardnotes/encryption'
+
+import { GetRevisionDTO } from './GetRevisionDTO'
+
+export class GetRevision implements UseCaseInterface<HistoryEntry> {
+  constructor(private revisionManager: RevisionClientInterface, private protocolService: EncryptionProviderInterface) {}
+
+  async execute(dto: GetRevisionDTO): Promise<Result<HistoryEntry>> {
+    const itemUuidOrError = Uuid.create(dto.itemUuid)
+    if (itemUuidOrError.isFailed()) {
+      return Result.fail(`Could not get revision: ${itemUuidOrError.getError()}`)
+    }
+    const itemUuid = itemUuidOrError.getValue()
+
+    const revisionUuidOrError = Uuid.create(dto.revisionUuid)
+    if (revisionUuidOrError.isFailed()) {
+      return Result.fail(`Could not get revision: ${revisionUuidOrError.getError()}`)
+    }
+    const revisionUuid = revisionUuidOrError.getValue()
+
+    const revision = await this.revisionManager.getRevision(itemUuid, revisionUuid)
+    if (revision === null) {
+      return Result.fail('Could not get revision: Revision not found')
+    }
+
+    const serverPayload = new EncryptedPayload({
+      ...PayloadTimestampDefaults(),
+      uuid: revision.uuid,
+      content: revision.content as string,
+      enc_item_key: revision.enc_item_key as string,
+      items_key_id: revision.items_key_id as string,
+      auth_hash: revision.auth_hash as string,
+      content_type: revision.content_type as ContentType,
+      updated_at: new Date(revision.updated_at),
+      created_at: new Date(revision.created_at),
+      waitingForKey: false,
+      errorDecrypting: false,
+    })
+
+    /**
+     * When an item is duplicated, its revisions also carry over to the newly created item.
+     * However since the new item has a different UUID than the source item, we must decrypt
+     * these olders revisions (which have not been mutated after copy) with the source item's
+     * uuid.
+     */
+    const embeddedParams = this.protocolService.getEmbeddedPayloadAuthenticatedData(serverPayload)
+    const sourceItemUuid = embeddedParams?.u as string | undefined
+
+    const payload = serverPayload.copy({
+      uuid: sourceItemUuid || revision.item_uuid,
+    })
+
+    if (!isRemotePayloadAllowed(payload)) {
+      return Result.fail(`Remote payload is disallowed: ${JSON.stringify(payload)}`)
+    }
+
+    const encryptedPayload = new EncryptedPayload(payload)
+
+    const decryptedPayload = await this.protocolService.decryptSplitSingle<NoteContent>({
+      usesItemsKeyWithKeyLookup: { items: [encryptedPayload] },
+    })
+
+    if (isErrorDecryptingPayload(decryptedPayload)) {
+      return Result.fail('Could not decrypt revision.')
+    }
+
+    return Result.ok(new HistoryEntry(decryptedPayload))
+  }
+}

packages/snjs/lib/Domain/UseCase/GetRevision/GetRevisionDTO.ts

@@ -0,0 +1,4 @@
+export interface GetRevisionDTO {
+  itemUuid: string
+  revisionUuid: string
+}