Support voice memo backups

ts/services/backups/export.ts

@@ -87,10 +87,10 @@ import {
   numberToPhoneType,
 } from '../../types/EmbeddedContact';
 import {
-  isVoiceMessage,
   type AttachmentType,
   isGIF,
   isDownloaded,
+  isVoiceMessage as isVoiceMessageAttachment,
 } from '../../types/Attachment';
 import {
   getFilePointerForAttachment,
@@ -1692,7 +1692,7 @@ export class BackupExportStream extends Readable {
   private getMessageAttachmentFlag(
     attachment: AttachmentType
   ): Backups.MessageAttachment.Flag {
-    if (isVoiceMessage(attachment)) {
+    if (isVoiceMessageAttachment(attachment)) {
       return Backups.MessageAttachment.Flag.VOICE_MESSAGE;
     }
     if (isGIF([attachment])) {
@@ -1876,6 +1876,9 @@ export class BackupExportStream extends Readable {
     >,
     backupLevel: BackupLevel
   ): Promise<Backups.IStandardMessage> {
+    const isVoiceMessage = message.attachments?.some(isVoiceMessageAttachment);
+    const includeText = !isVoiceMessage;
+
     return {
       quote: await this.toQuote(message.quote),
       attachments: message.attachments
@@ -1889,13 +1892,17 @@ export class BackupExportStream extends Readable {
             })
           )
         : undefined,
-      text: {
-        // Note that we store full text on the message model so we have to
-        // trim it before serializing.
-        body: message.body?.slice(0, LONG_ATTACHMENT_LIMIT),
-        bodyRanges: message.bodyRanges?.map(range => this.toBodyRange(range)),
-      },
-
+      text: includeText
+        ? {
+            // TODO (DESKTOP-7207): handle long message text attachments
+            // Note that we store full text on the message model so we have to
+            // trim it before serializing.
+            body: message.body?.slice(0, LONG_ATTACHMENT_LIMIT),
+            bodyRanges: message.bodyRanges?.map(range =>
+              this.toBodyRange(range)
+            ),
+          }
+        : undefined,
       linkPreview: message.preview
         ? await Promise.all(
             message.preview.map(async preview => {

ts/services/backups/import.ts

@@ -58,7 +58,10 @@ import { queueAttachmentDownloads } from '../../util/queueAttachmentDownloads';
 import { drop } from '../../util/drop';
 import { isNotNil } from '../../util/isNotNil';
 import { isGroup } from '../../util/whatTypeOfConversation';
-import { convertFilePointerToAttachment } from './util/filePointers';
+import {
+  convertBackupMessageAttachmentToAttachment,
+  convertFilePointerToAttachment,
+} from './util/filePointers';
 
 const MAX_CONCURRENCY = 10;
 
@@ -976,12 +979,7 @@ export class BackupImportStream extends Writable {
       body: data.text?.body || undefined,
       attachments: data.attachments?.length
         ? data.attachments
-            .map(attachment => {
-              if (!attachment.pointer) {
-                return null;
-              }
-              return convertFilePointerToAttachment(attachment.pointer);
-            })
+            .map(convertBackupMessageAttachmentToAttachment)
             .filter(isNotNil)
         : undefined,
       preview: data.linkPreview?.length

ts/services/backups/util/filePointers.ts

@@ -20,7 +20,7 @@ import {
   isDecryptable,
   isReencryptableToSameDigest,
 } from '../../../types/Attachment';
-import { Backups } from '../../../protobuf';
+import { Backups, SignalService } from '../../../protobuf';
 import * as Bytes from '../../../Bytes';
 import { getTimestampFromLong } from '../../../util/timestampLongUtils';
 import {
@@ -36,6 +36,7 @@ import {
   getMediaNameForAttachment,
 } from './mediaId';
 import { redactGenericText } from '../../../util/privacy';
+import { missingCaseError } from '../../../util/missingCaseError';
 
 export function convertFilePointerToAttachment(
   filePointer: Backups.FilePointer
@@ -123,6 +124,35 @@ export function convertFilePointerToAttachment(
   throw new Error('convertFilePointerToAttachment: mising locator');
 }
 
+export function convertBackupMessageAttachmentToAttachment(
+  messageAttachment: Backups.IMessageAttachment
+): AttachmentType | null {
+  if (!messageAttachment.pointer) {
+    return null;
+  }
+  const result = convertFilePointerToAttachment(messageAttachment.pointer);
+  switch (messageAttachment.flag) {
+    case Backups.MessageAttachment.Flag.VOICE_MESSAGE:
+      result.flags = SignalService.AttachmentPointer.Flags.VOICE_MESSAGE;
+      break;
+    case Backups.MessageAttachment.Flag.BORDERLESS:
+      result.flags = SignalService.AttachmentPointer.Flags.BORDERLESS;
+      break;
+    case Backups.MessageAttachment.Flag.GIF:
+      result.flags = SignalService.AttachmentPointer.Flags.GIF;
+      break;
+    case Backups.MessageAttachment.Flag.NONE:
+    case null:
+    case undefined:
+      result.flags = undefined;
+      break;
+    default:
+      throw missingCaseError(messageAttachment.flag);
+  }
+
+  return result;
+}
+
 /**
  * Some attachments saved on desktop do not include the key used to encrypt the file
  * originally. This means that we need to encrypt the file in-memory now (at

ts/test-electron/backup/attachments_test.ts

@@ -13,10 +13,11 @@ import { ReadStatus } from '../../messages/MessageReadStatus';
 import { SeenStatus } from '../../MessageSeenStatus';
 import { loadCallsHistory } from '../../services/callHistoryLoader';
 import { setupBasics, asymmetricRoundtripHarness } from './helpers';
-import { IMAGE_JPEG } from '../../types/MIME';
+import { AUDIO_MP3, IMAGE_JPEG } from '../../types/MIME';
 import type { MessageAttributesType } from '../../model-types';
-import type { AttachmentType } from '../../types/Attachment';
+import { isVoiceMessage, type AttachmentType } from '../../types/Attachment';
 import { strictAssert } from '../../util/assert';
+import { SignalService } from '../../protobuf';
 
 const CONTACT_A = generateAci();
 
@@ -129,6 +130,33 @@ describe('backup/attachments', () => {
         BackupLevel.Media
       );
     });
+    it('roundtrips voice message attachments', async () => {
+      const attachment = composeAttachment(1);
+      attachment.contentType = AUDIO_MP3;
+      attachment.flags = SignalService.AttachmentPointer.Flags.VOICE_MESSAGE;
+
+      strictAssert(isVoiceMessage(attachment), 'it is a voice attachment');
+      strictAssert(attachment.digest, 'digest exists');
+
+      await asymmetricRoundtripHarness(
+        [
+          composeMessage(1, {
+            attachments: [attachment],
+          }),
+        ],
+        [
+          composeMessage(1, {
+            attachments: [
+              {
+                ...omit(attachment, ['path', 'iv', 'uploadTimestamp']),
+                backupLocator: { mediaName: attachment.digest },
+              },
+            ],
+          }),
+        ],
+        BackupLevel.Media
+      );
+    });
   });
 
   describe('Preview attachments', () => {