feat: add ability to configure and utilize soft-delete and restore

src/bucket.ts

@@ -168,6 +168,7 @@ export interface GetFilesOptions {
   maxApiCalls?: number;
   maxResults?: number;
   pageToken?: string;
+  softDeleted?: boolean;
   startOffset?: string;
   userProject?: string;
   versions?: boolean;
@@ -341,6 +342,10 @@ export interface BucketMetadata extends BaseMetadata {
     retentionPeriod?: string | number;
   } | null;
   rpo?: string;
+  softDeletePolicy?: {
+    retentionDurationSeconds?: string | number;
+    readonly effectiveTime?: string;
+  };
   storageClass?: string;
   timeCreated?: string;
   updated?: string;
@@ -2624,6 +2629,9 @@ class Bucket extends ServiceObject<Bucket, BucketMetadata> {
    *     or 1 page of results will be returned per call.
    * @property {string} [pageToken] A previously-returned page token
    *     representing part of the larger set of results to view.
+   * @property {boolean} [softDeleted] If true, only soft-deleted object versions will be
+   *     listed as distinct results in order of generation number. Note `soft_deleted` and
+   *     `versions` cannot be set to true simultaneously.
    * @property {string} [startOffset] Filter results to objects whose names are
    * lexicographically equal to or after startOffset. If endOffset is also set,
    * the objects listed have names between startOffset (inclusive) and endOffset (exclusive).
@@ -2662,6 +2670,9 @@ class Bucket extends ServiceObject<Bucket, BucketMetadata> {
    *     or 1 page of results will be returned per call.
    * @param {string} [query.pageToken] A previously-returned page token
    *     representing part of the larger set of results to view.
+   * @param {boolean} [query.softDeleted] If true, only soft-deleted object versions will be
+   *     listed as distinct results in order of generation number. Note `soft_deleted` and
+   *     `versions` cannot be set to true simultaneously.
    * @param {string} [query.startOffset] Filter results to objects whose names are
    * lexicographically equal to or after startOffset. If endOffset is also set,
    * the objects listed have names between startOffset (inclusive) and endOffset (exclusive).

src/file.ts

@@ -72,6 +72,8 @@ import {
   BaseMetadata,
   DeleteCallback,
   DeleteOptions,
+  GetResponse,
+  InstanceResponseCallback,
   RequestResponse,
   SetMetadataOptions,
 } from './nodejs-common/service-object.js';
@@ -172,6 +174,8 @@ export interface GetFileMetadataCallback {
 
 export interface GetFileOptions extends GetConfig {
   userProject?: string;
+  generation?: number;
+  softDeleted?: boolean;
 }
 
 export type GetFileResponse = [File, unknown];
@@ -418,6 +422,11 @@ export interface SetStorageClassCallback {
   (err?: Error | null, apiResponse?: unknown): void;
 }
 
+export interface RestoreOptions extends PreconditionOptions {
+  generation: number;
+  projection?: 'full' | 'noAcl';
+}
+
 export interface FileMetadata extends BaseMetadata {
   acl?: AclMetadata[] | null;
   bucket?: string;
@@ -436,6 +445,7 @@ export interface FileMetadata extends BaseMetadata {
   eventBasedHold?: boolean | null;
   readonly eventBasedHoldReleaseTime?: string;
   generation?: string | number;
+  hardDeleteTime?: string;
   kmsKeyName?: string;
   md5Hash?: string;
   mediaLink?: string;
@@ -454,6 +464,7 @@ export interface FileMetadata extends BaseMetadata {
   } | null;
   retentionExpirationTime?: string;
   size?: string | number;
+  softDeleteTime?: string;
   storageClass?: string;
   temporaryHold?: boolean | null;
   timeCreated?: string;
@@ -803,6 +814,9 @@ class File extends ServiceObject<File, FileMetadata> {
        * @param {options} [options] Configuration options.
        * @param {string} [options.userProject] The ID of the project which will be
        *     billed for the request.
+       * @param {number} [options.generation] The generation number to get
+       * @param {boolean} [options.softDeleted] If true, returns the soft-deleted object.
+            Object `generation` is required if `softDeleted` is set to True.
        * @param {GetFileCallback} [callback] Callback function.
        * @returns {Promise<GetFileResponse>}
        *
@@ -2344,6 +2358,27 @@ class File extends ServiceObject<File, FileMetadata> {
     return this;
   }
 
+  get(options?: GetFileOptions): Promise<GetResponse<File>>;
+  get(callback: InstanceResponseCallback<File>): void;
+  get(options: GetFileOptions, callback: InstanceResponseCallback<File>): void;
+  get(
+    optionsOrCallback?: GetFileOptions | InstanceResponseCallback<File>,
+    cb?: InstanceResponseCallback<File>
+  ): Promise<GetResponse<File>> | void {
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    const options: any =
+      typeof optionsOrCallback === 'object' ? optionsOrCallback : {};
+    cb =
+      typeof optionsOrCallback === 'function'
+        ? (optionsOrCallback as InstanceResponseCallback<File>)
+        : cb;
+
+    super
+      .get(options)
+      .then(resp => cb!(null, ...resp))
+      .catch(cb!);
+  }
+
   getExpirationDate(): Promise<GetExpirationDateResponse>;
   getExpirationDate(callback: GetExpirationDateCallback): void;
   /**
@@ -3597,6 +3632,39 @@ class File extends ServiceObject<File, FileMetadata> {
     this.move(destinationFile, options, callback);
   }
 
+  /**
+   * @typedef {object} RestoreOptions Options for File#restore(). See an
+   *     {@link https://cloud.google.com/storage/docs/json_api/v1/objects#resource| Object resource}.
+   * @param {string} [userProject] The ID of the project which will be
+   *     billed for the request.
+   * @param {number} [generation] If present, selects a specific revision of this object.
+   * @param {string} [projection] Specifies the set of properties to return. If used, must be 'full' or 'noAcl'.
+   * @param {string | number} [ifGenerationMatch] Request proceeds if the generation of the target resource
+   *  matches the value used in the precondition.
+   *  If the values don't match, the request fails with a 412 Precondition Failed response.
+   * @param {string | number} [ifGenerationNotMatch] Request proceeds if the generation of the target resource does
+   *  not match the value used in the precondition. If the values match, the request fails with a 304 Not Modified response.
+   * @param {string | number} [ifMetagenerationMatch] Request proceeds if the meta-generation of the target resource
+   *  matches the value used in the precondition.
+   *  If the values don't match, the request fails with a 412 Precondition Failed response.
+   * @param {string | number} [ifMetagenerationNotMatch]  Request proceeds if the meta-generation of the target resource does
+   *  not match the value used in the precondition. If the values match, the request fails with a 304 Not Modified response.
+   */
+  /**
+   * Restores a soft-deleted file
+   * @param {RestoreOptions} options Restore options.
+   * @returns {Promise<File>}
+   */
+  async restore(options: RestoreOptions): Promise<File> {
+    const [file] = await this.request({
+      method: 'POST',
+      uri: '/restore',
+      qs: options,
+    });
+
+    return file as File;
+  }
+
   request(reqOpts: DecorateRequestOptions): Promise<RequestResponse>;
   request(
     reqOpts: DecorateRequestOptions,
@@ -4244,6 +4312,7 @@ promisifyAll(File, {
     'setEncryptionKey',
     'shouldRetryBasedOnPreconditionAndIdempotencyStrat',
     'getBufferFromReadable',
+    'restore',
   ],
 });
 

system-test/storage.ts

@@ -773,6 +773,10 @@ describe('storage', function () {
 
     beforeEach(createBucket);
 
+    afterEach(async () => {
+      await bucket.delete();
+    });
+
     it("sets bucket's RPO to ASYNC_TURBO", async () => {
       await setTurboReplication(bucket, RPO_ASYNC_TURBO);
       const [bucketMetadata] = await bucket.getMetadata();
@@ -786,6 +790,80 @@ describe('storage', function () {
     });
   });
 
+  describe('soft-delete', () => {
+    let bucket: Bucket;
+    const SOFT_DELETE_RETENTION_SECONDS = 7 * 24 * 60 * 60; //7 days in seconds;
+
+    beforeEach(async () => {
+      bucket = storage.bucket(generateName());
+      await bucket.create();
+      await bucket.setMetadata({
+        softDeletePolicy: {
+          retentionDurationSeconds: SOFT_DELETE_RETENTION_SECONDS,
+        },
+      });
+    });
+
+    afterEach(async () => {
+      await bucket.deleteFiles({force: true, versions: true});
+      await bucket.delete();
+    });
+
+    it('should set softDeletePolicy correctly', async () => {
+      const metadata = await bucket.getMetadata();
+      assert(metadata[0].softDeletePolicy);
+      assert(metadata[0].softDeletePolicy.effectiveTime);
+      assert.deepStrictEqual(
+        metadata[0].softDeletePolicy.retentionDurationSeconds,
+        SOFT_DELETE_RETENTION_SECONDS.toString()
+      );
+    });
+
+    it('should LIST soft-deleted files', async () => {
+      const f1 = bucket.file('file1');
+      const f2 = bucket.file('file2');
+      await f1.save('file1');
+      await f2.save('file2');
+      await f1.delete();
+      await f2.delete();
+      const [notSoftDeletedFiles] = await bucket.getFiles();
+      assert.strictEqual(notSoftDeletedFiles.length, 0);
+      const [softDeletedFiles] = await bucket.getFiles({softDeleted: true});
+      assert.strictEqual(softDeletedFiles.length, 2);
+    });
+
+    it('should GET a soft-deleted file', async () => {
+      const f1 = bucket.file('file3');
+      await f1.save('file3');
+      const [metadata] = await f1.getMetadata();
+      await f1.delete();
+      const [softDeletedFile] = await f1.get({
+        softDeleted: true,
+        generation: parseInt(metadata.generation?.toString() || '0'),
+      });
+      assert(softDeletedFile);
+      assert.strictEqual(
+        softDeletedFile.metadata.generation,
+        metadata.generation
+      );
+    });
+
+    it('should restore a soft-deleted file', async () => {
+      const f1 = bucket.file('file4');
+      await f1.save('file4');
+      const [metadata] = await f1.getMetadata();
+      await f1.delete();
+      let [files] = await bucket.getFiles();
+      assert.strictEqual(files.length, 0);
+      const restoredFile = await f1.restore({
+        generation: parseInt(metadata.generation?.toString() || '0'),
+      });
+      assert(restoredFile);
+      [files] = await bucket.getFiles();
+      assert.strictEqual(files.length, 1);
+    });
+  });
+
   describe('dual-region', () => {
     let bucket: Bucket;
 

test/bucket.ts

@@ -1848,6 +1848,25 @@ describe('Bucket', () => {
       });
     });
 
+    it('should return soft-deleted Files if queried for softDeleted', done => {
+      const softDeletedTime = new Date('1/1/2024').toISOString();
+      bucket.request = (
+        reqOpts: DecorateRequestOptions,
+        callback: Function
+      ) => {
+        callback(null, {
+          items: [{name: 'fake-file-name', generation: 1, softDeletedTime}],
+        });
+      };
+
+      bucket.getFiles({softDeleted: true}, (err: Error, files: FakeFile[]) => {
+        assert.ifError(err);
+        assert(files[0] instanceof FakeFile);
+        assert.strictEqual(files[0].metadata.softDeletedTime, softDeletedTime);
+        done();
+      });
+    });
+
     it('should set kmsKeyName on file', done => {
       const kmsKeyName = 'kms-key-name';
 

test/file.ts

@@ -104,6 +104,7 @@ const fakePromisify = {
       'setEncryptionKey',
       'shouldRetryBasedOnPreconditionAndIdempotencyStrat',
       'getBufferFromReadable',
+      'restore',
     ]);
   },
 };
@@ -4145,6 +4146,26 @@ describe('File', () => {
     });
   });
 
+  describe('restore', () => {
+    it('should pass options to underlying request call', async () => {
+      file.parent.request = function (
+        reqOpts: DecorateRequestOptions,
+        callback_: Function
+      ) {
+        assert.strictEqual(this, file);
+        assert.deepStrictEqual(reqOpts, {
+          method: 'POST',
+          uri: '/restore',
+          qs: {generation: 123},
+        });
+        assert.strictEqual(callback_, undefined);
+        return [];
+      };
+
+      await file.restore({generation: 123});
+    });
+  });
+
   describe('request', () => {
     it('should call the parent request function', () => {
       const options = {};