Support for local deletes synced to all your devices

_locales/en/messages.json

@@ -5010,6 +5010,10 @@
     "messageformat": "What devices would you like to delete {count, plural, one {this message} other {these messages}} from?",
     "description": "within note to self conversation > delete selected messages > confirmation modal > description"
   },
+  "icu:DeleteMessagesModal--description--noteToSelf--deleteSync": {
+    "messageformat": "{count, plural, one {This message} other {These messages}} will be deleted from all your devices.",
+    "description": "within note to self conversation > delete selected messages > confirmation modal > description"
+  },
   "icu:DeleteMessagesModal--deleteForMe": {
     "messageformat": "Delete for me",
     "description": "delete selected messages > confirmation modal > delete for me"
@@ -5026,6 +5030,10 @@
     "messageformat": "Delete from all devices",
     "description": "within note to self conversation > delete selected messages > confirmation modal > delete from all devices (same as delete for everyone)"
   },
+  "icu:DeleteMessagesModal--noteToSelf--deleteSync": {
+    "messageformat": "Delete",
+    "description": "When delete sync is enabled, there is only one Delete option in Note to Self"
+  },
   "icu:DeleteMessagesModal__toast--TooManyMessagesToDeleteForEveryone": {
     "messageformat": "You can only select up to {count, plural, one {# message} other {# messages}} to delete for everyone",
     "description": "delete selected messages > confirmation modal > deleted for everyone (disabled) > toast > too many messages to 'delete for everyone'"
@@ -6292,6 +6300,18 @@
     "messageformat": "Your connections can see your name and photo, and can see posts to \"My Story\" unless you hide it from them",
     "description": "Additional information about signal connections and the stories they can see"
   },
+  "icu:LocalDeleteWarningModal__header": {
+    "messageformat": "\"Delete for Me\" now deletes from all of your devices",
+    "description": "Emphasized text at the top of the explainer dialog you get when you first delete a message or conversation"
+  },
+  "icu:LocalDeleteWarningModal__description": {
+    "messageformat": "When you delete a message in a chat, the message will be deleted from your phone and all linked devices.",
+    "description": "More detailed description of new delete behavior shown in explainer dialog"
+  },
+  "icu:LocalDeleteWarningModal__confirm": {
+    "messageformat": "Got it",
+    "description": "Button to dismiss the dialog explaining that 'delete for me' now syncs between devices"
+  },
   "icu:Stories__title": {
     "messageformat": "Stories",
     "description": "Title for the stories list"

images/local-delete-sync.svg

@@ -0,0 +1 @@
+<?xml version="1.0" encoding="UTF-8"?><svg id="a" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 138 92"><defs><style>.b{fill:#8f8f8f;fill-rule:evenodd;}.b,.c,.d{stroke-width:0px;}.c{fill:#6b88e8;}.d{fill:#e4e7ff;}</style></defs><path class="d" d="m61.26,29.835h-16.112c-.636,0-1.249.101-1.824.284v16.431c.576.184,1.188.284,1.824.284h16.112c3.314,0,6-2.686,6-6v-5c0-3.314-2.686-6-6-6Z"/><path class="c" d="m95.372,57.835c0-3.314,2.686-6,6-6h23.139c3.314,0,6,2.686,6,6v8c0,3.314-2.686,6-6,6h-23.139c-3.314,0-6-2.686-6-6v-8Z"/><path class="d" d="m34.128,16.835c0-3.314,2.686-6,6-6h36.192c3.314,0,6,2.686,6,6v5c0,3.314-2.686,6-6,6h-36.192c-3.314,0-6-2.686-6-6v-5Z"/><path class="c" d="m18.198,69.902c0-2.761,2.239-5,5-5h9.879c2.762,0,5,2.239,5,5v4.667c0,2.761-2.238,5-5,5h-9.879c-2.761,0-5-2.239-5-5v-4.667Z"/><path class="d" d="m5.681,56.568c0-2.835,2.298-5.133,5.133-5.133h9.612c2.835,0,5.133,2.298,5.133,5.133h0c0,2.835-2.298,5.133-5.133,5.133h-9.612c-2.835,0-5.133-2.298-5.133-5.133h0Z"/><path class="d" d="m5.681,45.102c0-2.835,2.298-5.133,5.133-5.133h15.502c2.835,0,5.133,2.298,5.133,5.133h0c0,2.835-2.298,5.133-5.133,5.133h-15.502c-2.835,0-5.133-2.298-5.133-5.133h0Z"/><path class="b" d="m125,0H38.033c-7.089,0-12.835,5.746-12.835,12.835v10.632h-13.198C5.464,23.467.165,28.765.165,35.302v44.533c0,6.536,5.299,11.835,11.835,11.835h20.495c4.654,0,8.669-2.693,10.602-6.6h81.903c7.089,0,12.835-5.746,12.835-12.835V12.835c0-7.089-5.746-12.835-12.835-12.835ZM40.659,79.835c0,4.509-3.656,8.165-8.165,8.165H12c-4.509,0-8.165-3.656-8.165-8.165v-44.533c0-4.509,3.656-8.165,8.165-8.165h20.495c4.509,0,8.165,3.656,8.165,8.165v44.533Zm93.505-7.6c0,5.062-4.103,9.165-9.165,9.165H44.214c.068-.513.115-1.033.115-1.565v-44.533c0-6.536-5.299-11.835-11.835-11.835h-3.627v-10.632c0-5.062,4.103-9.165,9.165-9.165h86.967c5.062,0,9.165,4.103,9.165,9.165v59.4Z"/></svg>

protos/SignalService.proto

@@ -633,6 +633,43 @@ message SyncMessage {
     optional uint64 timestamp = 2;
   }
 
+  message DeleteForMe {
+    message ConversationIdentifier {
+      oneof identifier {
+        string threadAci = 1;
+        bytes threadGroupId = 2;
+        string threadE164 = 3;
+      }
+    }
+  
+    message AddressableMessage {
+      oneof author {
+        string authorAci = 1;
+        string authorE164 = 2;
+      }
+      optional uint64 sentTimestamp = 3;
+    }
+
+    message MessageDeletes {
+      optional ConversationIdentifier conversation = 1;
+      repeated AddressableMessage messages = 2;
+    }
+
+    message ConversationDelete {
+      optional ConversationIdentifier conversation = 1;
+      repeated AddressableMessage mostRecentMessages = 2;
+      optional bool isFullDelete = 3;
+    }
+
+    message LocalOnlyConversationDelete {
+      optional ConversationIdentifier conversation = 1;
+    }
+
+    repeated MessageDeletes messageDeletes = 1;
+    repeated ConversationDelete conversationDeletes = 2;
+    repeated LocalOnlyConversationDelete localOnlyConversationDeletes = 3;
+  }
+  
   optional Sent                   sent                   = 1;
   optional Contacts               contacts               = 2;
   reserved /* groups */ 3;
@@ -654,6 +691,7 @@ message SyncMessage {
   optional CallEvent              callEvent              = 19;
   optional CallLinkUpdate         callLinkUpdate         = 20;
   optional CallLogEvent           callLogEvent           = 21;
+  optional DeleteForMe            deleteForMe            = 22;
 }
 
 message AttachmentPointer {

stylesheets/components/LocalDeleteWarningModal.scss

@@ -0,0 +1,35 @@
+// Copyright 2022 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+.LocalDeleteWarningModal__width-container {
+  max-width: 440px;
+}
+
+.LocalDeleteWarningModal__image {
+  margin-block: 18px;
+  text-align: center;
+}
+
+.LocalDeleteWarningModal__header {
+  @include font-title-2;
+
+  margin-block: 18px;
+  margin-inline: 8px;
+  text-align: center;
+}
+
+.LocalDeleteWarningModal__description {
+  margin-block: 12px;
+  margin-inline: 8px;
+  text-align: center;
+}
+
+.LocalDeleteWarningModal__button {
+  display: flex;
+  justify-content: center;
+  margin-top: 49px;
+
+  button {
+    padding-inline: 26px;
+  }
+}

stylesheets/manifest.scss

@@ -113,6 +113,7 @@
 @import './components/LeftPaneSearchInput.scss';
 @import './components/Lightbox.scss';
 @import './components/ListTile.scss';
+@import './components/LocalDeleteWarningModal.scss';
 @import './components/MediaEditor.scss';
 @import './components/MediaQualitySelector.scss';
 @import './components/MessageAudio.scss';

ts/CI/benchmarkConversationOpen.ts

@@ -50,7 +50,7 @@ export async function populateConversationWithMessages({
   );
 
   log.info(`${logId}: destroying all messages in ${conversationId}`);
-  await conversation.destroyMessages();
+  await conversation.destroyMessages({ source: 'local-delete' });
 
   log.info(`${logId}: adding ${messageCount} messages to ${conversationId}`);
   let timestamp = Date.now();

ts/RemoteConfig.ts

@@ -18,6 +18,8 @@ export type ConfigKeyType =
   | 'desktop.calling.adhoc'
   | 'desktop.clientExpiration'
   | 'desktop.backup.credentialFetch'
+  | 'desktop.deleteSync.send'
+  | 'desktop.deleteSync.receive'
   | 'desktop.groupMultiTypingIndicators'
   | 'desktop.internalUser'
   | 'desktop.mediaQuality.levels'

ts/background.ts

@@ -86,6 +86,7 @@ import type {
   FetchLatestEvent,
   InvalidPlaintextEvent,
   KeysEvent,
+  DeleteForMeSyncEvent,
   MessageEvent,
   MessageEventData,
   MessageRequestResponseEvent,
@@ -111,21 +112,21 @@ import type { BadgesStateType } from './state/ducks/badges';
 import { areAnyCallsActiveOrRinging } from './state/selectors/calling';
 import { badgeImageFileDownloader } from './badges/badgeImageFileDownloader';
 import * as Deletes from './messageModifiers/Deletes';
-import type { EditAttributesType } from './messageModifiers/Edits';
 import * as Edits from './messageModifiers/Edits';
-import type { ReactionAttributesType } from './messageModifiers/Reactions';
 import * as MessageReceipts from './messageModifiers/MessageReceipts';
 import * as MessageRequests from './messageModifiers/MessageRequests';
 import * as Reactions from './messageModifiers/Reactions';
 import * as ReadSyncs from './messageModifiers/ReadSyncs';
-import * as ViewSyncs from './messageModifiers/ViewSyncs';
 import * as ViewOnceOpenSyncs from './messageModifiers/ViewOnceOpenSyncs';
+import * as ViewSyncs from './messageModifiers/ViewSyncs';
 import type { DeleteAttributesType } from './messageModifiers/Deletes';
+import type { EditAttributesType } from './messageModifiers/Edits';
 import type { MessageReceiptAttributesType } from './messageModifiers/MessageReceipts';
 import type { MessageRequestAttributesType } from './messageModifiers/MessageRequests';
+import type { ReactionAttributesType } from './messageModifiers/Reactions';
 import type { ReadSyncAttributesType } from './messageModifiers/ReadSyncs';
-import type { ViewSyncAttributesType } from './messageModifiers/ViewSyncs';
 import type { ViewOnceOpenSyncAttributesType } from './messageModifiers/ViewOnceOpenSyncs';
+import type { ViewSyncAttributesType } from './messageModifiers/ViewSyncs';
 import { ReadStatus } from './messages/MessageReadStatus';
 import type { SendStateByConversationId } from './messages/MessageSendState';
 import { SendStatus } from './messages/MessageSendState';
@@ -201,6 +202,8 @@ import { getThemeType } from './util/getThemeType';
 import { AttachmentDownloadManager } from './jobs/AttachmentDownloadManager';
 import { onCallLinkUpdateSync } from './util/onCallLinkUpdateSync';
 import { CallMode } from './types/Calling';
+import { queueSyncTasks } from './util/syncTasks';
+import { isEnabled } from './RemoteConfig';
 
 export function isOverHourIntoPast(timestamp: number): boolean {
   return isNumber(timestamp) && isOlderThan(timestamp, HOUR);
@@ -558,6 +561,24 @@ export async function startApp(): Promise<void> {
       storage: window.storage,
       serverTrustRoot: window.getServerTrustRoot(),
     });
+    const onFirstEmpty = async () => {
+      log.info('onFirstEmpty: Starting');
+
+      // We want to remove this handler on the next tick so we don't interfere with
+      //   the other handlers being notified of this instance of the 'empty' event.
+      setTimeout(() => {
+        messageReceiver?.removeEventListener('empty', onFirstEmpty);
+      }, 1);
+
+      log.info('onFirstEmpty: Fetching sync tasks');
+      const syncTasks = await window.Signal.Data.getAllSyncTasks();
+
+      log.info(`onFirstEmpty: Queuing ${syncTasks.length} sync tasks`);
+      await queueSyncTasks(syncTasks, window.Signal.Data.removeSyncTaskById);
+
+      log.info('onFirstEmpty: Done');
+    };
+    messageReceiver.addEventListener('empty', onFirstEmpty);
 
     function queuedEventListener<E extends Event>(
       handler: (event: E) => Promise<void> | void,
@@ -691,6 +712,10 @@ export async function startApp(): Promise<void> {
       'callLogEventSync',
       queuedEventListener(onCallLogEventSync, false)
     );
+    messageReceiver.addEventListener(
+      'deleteForMeSync',
+      queuedEventListener(onDeleteForMeSync, false)
+    );
 
     if (!window.storage.get('defaultConversationColor')) {
       drop(
@@ -3384,6 +3409,41 @@ export async function startApp(): Promise<void> {
 
     drop(MessageReceipts.onReceipt(attributes));
   }
+
+  async function onDeleteForMeSync(ev: DeleteForMeSyncEvent) {
+    const { confirm, timestamp, envelopeId, deleteForMeSync } = ev;
+    const logId = `onDeleteForMeSync(${timestamp})`;
+
+    if (!isEnabled('desktop.deleteSync.receive')) {
+      confirm();
+      return;
+    }
+
+    // The user clearly knows about this feature; they did it on another device!
+    drop(window.storage.put('localDeleteWarningShown', true));
+
+    log.info(`${logId}: Saving ${deleteForMeSync.length} sync tasks`);
+
+    const now = Date.now();
+    const syncTasks = deleteForMeSync.map(item => ({
+      id: generateUuid(),
+      attempts: 1,
+      createdAt: now,
+      data: item,
+      envelopeId,
+      sentAt: timestamp,
+      type: item.type,
+    }));
+    await window.Signal.Data.saveSyncTasks(syncTasks);
+
+    confirm();
+
+    log.info(`${logId}: Queuing ${syncTasks.length} sync tasks`);
+
+    await queueSyncTasks(syncTasks, window.Signal.Data.removeSyncTaskById);
+
+    log.info(`${logId}: Done`);
+  }
 }
 
 window.startApp = startApp;

ts/components/DeleteMessagesModal.stories.tsx

@@ -0,0 +1,78 @@
+// Copyright 2022 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import React from 'react';
+import type { Meta, StoryFn } from '@storybook/react';
+import { action } from '@storybook/addon-actions';
+
+import enMessages from '../../_locales/en/messages.json';
+import { setupI18n } from '../util/setupI18n';
+import DeleteMessagesModal from './DeleteMessagesModal';
+import type { DeleteMessagesModalProps } from './DeleteMessagesModal';
+
+const i18n = setupI18n('en', enMessages);
+
+export default {
+  title: 'Components/DeleteMessagesModal',
+  component: DeleteMessagesModal,
+  args: {
+    i18n,
+    isMe: false,
+    isDeleteSyncSendEnabled: false,
+    canDeleteForEveryone: true,
+    messageCount: 1,
+    onClose: action('onClose'),
+    onDeleteForMe: action('onDeleteForMe'),
+    onDeleteForEveryone: action('onDeleteForEveryone'),
+    showToast: action('showToast'),
+  },
+} satisfies Meta<DeleteMessagesModalProps>;
+
+function createProps(args: Partial<DeleteMessagesModalProps>) {
+  return {
+    i18n,
+    isMe: false,
+    isDeleteSyncSendEnabled: false,
+    canDeleteForEveryone: true,
+    messageCount: 1,
+    onClose: action('onClose'),
+    onDeleteForMe: action('onDeleteForMe'),
+    onDeleteForEveryone: action('onDeleteForEveryone'),
+    showToast: action('showToast'),
+    ...args,
+  };
+}
+
+// eslint-disable-next-line react/function-component-definition
+const Template: StoryFn<DeleteMessagesModalProps> = args => {
+  return <DeleteMessagesModal {...args} />;
+};
+
+export const OneMessage = Template.bind({});
+
+export const ThreeMessages = Template.bind({});
+ThreeMessages.args = createProps({
+  messageCount: 3,
+});
+
+export const IsMe = Template.bind({});
+IsMe.args = createProps({
+  isMe: true,
+});
+
+export const IsMeThreeMessages = Template.bind({});
+IsMeThreeMessages.args = createProps({
+  isMe: true,
+  messageCount: 3,
+});
+
+export const DeleteSyncEnabled = Template.bind({});
+DeleteSyncEnabled.args = createProps({
+  isDeleteSyncSendEnabled: true,
+});
+
+export const IsMeDeleteSyncEnabled = Template.bind({});
+IsMeDeleteSyncEnabled.args = createProps({
+  isDeleteSyncSendEnabled: true,
+  isMe: true,
+});

ts/components/DeleteMessagesModal.tsx

@@ -8,8 +8,9 @@ import type { LocalizerType } from '../types/Util';
 import type { ShowToastAction } from '../state/ducks/toast';
 import { ToastType } from '../types/Toast';
 
-type DeleteMessagesModalProps = Readonly<{
+export type DeleteMessagesModalProps = Readonly<{
   isMe: boolean;
+  isDeleteSyncSendEnabled: boolean;
   canDeleteForEveryone: boolean;
   i18n: LocalizerType;
   messageCount: number;
@@ -23,6 +24,7 @@ const MAX_DELETE_FOR_EVERYONE = 30;
 
 export default function DeleteMessagesModal({
   isMe,
+  isDeleteSyncSendEnabled,
   canDeleteForEveryone,
   i18n,
   messageCount,
@@ -33,15 +35,22 @@ export default function DeleteMessagesModal({
 }: DeleteMessagesModalProps): JSX.Element {
   const actions: Array<ActionSpec> = [];
 
+  const syncNoteToSelfDelete = isMe && isDeleteSyncSendEnabled;
+
+  let deleteForMeText = i18n('icu:DeleteMessagesModal--deleteForMe');
+  if (syncNoteToSelfDelete) {
+    deleteForMeText = i18n('icu:DeleteMessagesModal--noteToSelf--deleteSync');
+  } else if (isMe) {
+    deleteForMeText = i18n('icu:DeleteMessagesModal--deleteFromThisDevice');
+  }
+
   actions.push({
     action: onDeleteForMe,
     style: 'negative',
-    text: isMe
+    text: deleteForMeText,
-      ? i18n('icu:DeleteMessagesModal--deleteFromThisDevice')
-      : i18n('icu:DeleteMessagesModal--deleteForMe'),
   });
 
-  if (canDeleteForEveryone) {
+  if (canDeleteForEveryone && !syncNoteToSelfDelete) {
     const tooManyMessages = messageCount > MAX_DELETE_FOR_EVERYONE;
     actions.push({
       'aria-disabled': tooManyMessages,
@@ -63,6 +72,20 @@ export default function DeleteMessagesModal({
     });
   }
 
+  let descriptionText = i18n('icu:DeleteMessagesModal--description', {
+    count: messageCount,
+  });
+  if (syncNoteToSelfDelete) {
+    descriptionText = i18n(
+      'icu:DeleteMessagesModal--description--noteToSelf--deleteSync',
+      { count: messageCount }
+    );
+  } else if (isMe) {
+    descriptionText = i18n('icu:DeleteMessagesModal--description--noteToSelf', {
+      count: messageCount,
+    });
+  }
+
   return (
     <ConfirmationDialog
       actions={actions}
@@ -74,13 +97,7 @@ export default function DeleteMessagesModal({
       })}
       moduleClassName="DeleteMessagesModal"
     >
-      {isMe
+      {descriptionText}
-        ? i18n('icu:DeleteMessagesModal--description--noteToSelf', {
-            count: messageCount,
-          })
-        : i18n('icu:DeleteMessagesModal--description', {
-            count: messageCount,
-          })}
     </ConfirmationDialog>
   );
 }

ts/components/LocalDeleteWarningModal.stories.tsx

@@ -0,0 +1,30 @@
+// Copyright 2022 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import type { Meta, StoryFn } from '@storybook/react';
+import React from 'react';
+
+import { action } from '@storybook/addon-actions';
+import type { PropsType } from './LocalDeleteWarningModal';
+import enMessages from '../../_locales/en/messages.json';
+import { LocalDeleteWarningModal } from './LocalDeleteWarningModal';
+import { setupI18n } from '../util/setupI18n';
+
+const i18n = setupI18n('en', enMessages);
+
+export default {
+  title: 'Components/LocalDeleteWarningModal',
+  component: LocalDeleteWarningModal,
+  args: {
+    i18n,
+    onClose: action('onClose'),
+  },
+} satisfies Meta<PropsType>;
+
+// eslint-disable-next-line react/function-component-definition
+const Template: StoryFn<PropsType> = args => (
+  <LocalDeleteWarningModal {...args} />
+);
+
+export const Modal = Template.bind({});
+Modal.args = {};

ts/components/LocalDeleteWarningModal.tsx

@@ -0,0 +1,53 @@
+// Copyright 2022 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import React from 'react';
+
+import type { LocalizerType } from '../types/Util';
+import { Button, ButtonVariant } from './Button';
+import { I18n } from './I18n';
+import { Modal } from './Modal';
+
+export type PropsType = {
+  i18n: LocalizerType;
+  onClose: () => unknown;
+};
+
+export function LocalDeleteWarningModal({
+  i18n,
+  onClose,
+}: PropsType): JSX.Element {
+  return (
+    <Modal
+      modalName="LocalDeleteWarningModal"
+      moduleClassName="LocalDeleteWarningModal"
+      i18n={i18n}
+      onClose={onClose}
+    >
+      <div className="LocalDeleteWarningModal">
+        <div className="LocalDeleteWarningModal__image">
+          <img
+            src="images/local-delete-sync.svg"
+            height="92"
+            width="138"
+            alt=""
+          />
+        </div>
+
+        <div className="LocalDeleteWarningModal__header">
+          <I18n i18n={i18n} id="icu:LocalDeleteWarningModal__header" />
+        </div>
+
+        <div className="LocalDeleteWarningModal__description">
+          <I18n i18n={i18n} id="icu:LocalDeleteWarningModal__description" />
+        </div>
+
+        <div className="LocalDeleteWarningModal__button">
+          <Button onClick={onClose} variant={ButtonVariant.Primary}>
+            <I18n i18n={i18n} id="icu:LocalDeleteWarningModal__confirm" />
+          </Button>
+        </div>
+      </div>
+    </Modal>
+  );
+}

ts/components/conversation/ConversationHeader.stories.tsx

@@ -46,6 +46,10 @@ const commonProps = {
 
   i18n,
 
+  localDeleteWarningShown: true,
+  isDeleteSyncSendEnabled: true,
+  setLocalDeleteWarningShown: action('setLocalDeleteWarningShown'),
+
   onConversationAccept: action('onConversationAccept'),
   onConversationArchive: action('onConversationArchive'),
   onConversationBlock: action('onConversationBlock'),
@@ -412,3 +416,32 @@ export function Unaccepted(): JSX.Element {
     </>
   );
 }
+
+export function NeedsDeleteConfirmation(): JSX.Element {
+  const [localDeleteWarningShown, setLocalDeleteWarningShown] =
+    React.useState(false);
+  const props = {
+    ...commonProps,
+    conversation: getDefaultConversation(),
+    localDeleteWarningShown,
+    setLocalDeleteWarningShown: () => setLocalDeleteWarningShown(true),
+  };
+  const theme = useContext(StorybookThemeContext);
+
+  return <ConversationHeader {...props} theme={theme} />;
+}
+
+export function NeedsDeleteConfirmationButNotEnabled(): JSX.Element {
+  const [localDeleteWarningShown, setLocalDeleteWarningShown] =
+    React.useState(false);
+  const props = {
+    ...commonProps,
+    conversation: getDefaultConversation(),
+    localDeleteWarningShown,
+    isDeleteSyncSendEnabled: false,
+    setLocalDeleteWarningShown: () => setLocalDeleteWarningShown(true),
+  };
+  const theme = useContext(StorybookThemeContext);
+
+  return <ConversationHeader {...props} theme={theme} />;
+}

ts/components/conversation/ConversationHeader.tsx

@@ -38,6 +38,7 @@ import {
   MessageRequestState,
 } from './MessageRequestActionsConfirmation';
 import type { MinimalConversation } from '../../hooks/useMinimalConversation';
+import { LocalDeleteWarningModal } from '../LocalDeleteWarningModal';
 
 function HeaderInfoTitle({
   name,
@@ -92,6 +93,8 @@ export type PropsDataType = {
   conversationName: ContactNameData;
   hasPanelShowing?: boolean;
   hasStories?: HasStories;
+  localDeleteWarningShown: boolean;
+  isDeleteSyncSendEnabled: boolean;
   isMissingMandatoryProfileSharing?: boolean;
   isSelectMode: boolean;
   isSignalConversation?: boolean;
@@ -102,6 +105,8 @@ export type PropsDataType = {
 };
 
 export type PropsActionsType = {
+  setLocalDeleteWarningShown: () => void;
+
   onConversationAccept: () => void;
   onConversationArchive: () => void;
   onConversationBlock: () => void;
@@ -147,10 +152,12 @@ export const ConversationHeader = memo(function ConversationHeader({
   hasPanelShowing,
   hasStories,
   i18n,
+  isDeleteSyncSendEnabled,
   isMissingMandatoryProfileSharing,
   isSelectMode,
   isSignalConversation,
   isSMSOnly,
+  localDeleteWarningShown,
   onConversationAccept,
   onConversationArchive,
   onConversationBlock,
@@ -174,6 +181,7 @@ export const ConversationHeader = memo(function ConversationHeader({
   onViewRecentMedia,
   onViewUserStories,
   outgoingCallButtonStyle,
+  setLocalDeleteWarningShown,
   sharedGroupNames,
   theme,
 }: PropsType): JSX.Element | null {
@@ -223,13 +231,16 @@ export const ConversationHeader = memo(function ConversationHeader({
       {hasDeleteMessagesConfirmation && (
         <DeleteMessagesConfirmationDialog
           i18n={i18n}
-          onDestoryMessages={() => {
+          isDeleteSyncSendEnabled={isDeleteSyncSendEnabled}
+          localDeleteWarningShown={localDeleteWarningShown}
+          onDestroyMessages={() => {
             setHasDeleteMessagesConfirmation(false);
             onConversationDeleteMessages();
           }}
           onClose={() => {
             setHasDeleteMessagesConfirmation(false);
           }}
+          setLocalDeleteWarningShown={setLocalDeleteWarningShown}
         />
       )}
       {hasLeaveGroupConfirmation && (
@@ -923,14 +934,29 @@ function CannotLeaveGroupBecauseYouAreLastAdminAlert({
 }
 
 function DeleteMessagesConfirmationDialog({
+  isDeleteSyncSendEnabled,
   i18n,
-  onDestoryMessages,
+  localDeleteWarningShown,
+  onDestroyMessages,
   onClose,
+  setLocalDeleteWarningShown,
 }: {
+  isDeleteSyncSendEnabled: boolean;
   i18n: LocalizerType;
-  onDestoryMessages: () => void;
+  localDeleteWarningShown: boolean;
+  onDestroyMessages: () => void;
   onClose: () => void;
+  setLocalDeleteWarningShown: () => void;
 }) {
+  if (!localDeleteWarningShown && isDeleteSyncSendEnabled) {
+    return (
+      <LocalDeleteWarningModal
+        i18n={i18n}
+        onClose={setLocalDeleteWarningShown}
+      />
+    );
+  }
+
   return (
     <ConfirmationDialog
       dialogName="ConversationHeader.destroyMessages"
@@ -939,7 +965,7 @@ function DeleteMessagesConfirmationDialog({
       )}
       actions={[
         {
-          action: onDestoryMessages,
+          action: onDestroyMessages,
           style: 'negative',
           text: i18n('icu:delete'),
         },

ts/messageModifiers/DeletesForMe.ts

@@ -0,0 +1,113 @@
+// Copyright 2020 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import * as log from '../logging/log';
+import * as Errors from '../types/errors';
+import { drop } from '../util/drop';
+import { getMessageSentTimestampSet } from '../util/getMessageSentTimestampSet';
+
+import type { MessageAttributesType } from '../model-types';
+import type {
+  ConversationToDelete,
+  MessageToDelete,
+} from '../textsecure/messageReceiverEvents';
+import {
+  deleteMessage,
+  doesMessageMatch,
+  getConversationFromTarget,
+  getMessageQueryFromTarget,
+} from '../util/deleteForMe';
+import dataInterface from '../sql/Client';
+
+const { removeSyncTaskById } = dataInterface;
+
+export type DeleteForMeAttributesType = {
+  conversation: ConversationToDelete;
+  envelopeId: string;
+  message: MessageToDelete;
+  syncTaskId: string;
+  timestamp: number;
+};
+
+const deletes = new Map<string, DeleteForMeAttributesType>();
+
+async function remove(item: DeleteForMeAttributesType): Promise<void> {
+  await removeSyncTaskById(item.syncTaskId);
+  deletes.delete(item.envelopeId);
+}
+
+export async function forMessage(
+  messageAttributes: MessageAttributesType
+): Promise<Array<DeleteForMeAttributesType>> {
+  const sentTimestamps = getMessageSentTimestampSet(messageAttributes);
+  const deleteValues = Array.from(deletes.values());
+
+  const matchingDeletes = deleteValues.filter(item => {
+    const itemConversation = getConversationFromTarget(item.conversation);
+    const query = getMessageQueryFromTarget(item.message);
+
+    if (!itemConversation) {
+      return false;
+    }
+
+    return doesMessageMatch({
+      conversationId: itemConversation.id,
+      message: messageAttributes,
+      query,
+      sentTimestamps,
+    });
+  });
+
+  if (!matchingDeletes.length) {
+    return [];
+  }
+
+  log.info('Found early DeleteForMe for message');
+  await Promise.all(
+    matchingDeletes.map(async item => {
+      await remove(item);
+    })
+  );
+  return matchingDeletes;
+}
+
+export async function onDelete(item: DeleteForMeAttributesType): Promise<void> {
+  try {
+    const conversation = getConversationFromTarget(item.conversation);
+    const message = getMessageQueryFromTarget(item.message);
+
+    const logId = `DeletesForMe.onDelete(sentAt=${message.sentAt},timestamp=${item.timestamp},envelopeId=${item.envelopeId})`;
+
+    deletes.set(item.envelopeId, item);
+
+    if (!conversation) {
+      log.warn(`${logId}: Conversation not found!`);
+      await remove(item);
+      return;
+    }
+
+    // Do not await, since this a can deadlock the queue
+    drop(
+      conversation.queueJob('DeletesForMe.onDelete', async () => {
+        log.info(`${logId}: Starting...`);
+
+        const result = await deleteMessage(
+          conversation.id,
+          item.message,
+          logId
+        );
+        if (result) {
+          await remove(item);
+        }
+
+        log.info(`${logId}: Complete (result=${result})`);
+      })
+    );
+  } catch (error) {
+    log.error(
+      `DeletesForMe.onDelete(task=${item.syncTaskId},envelopeId=${item.envelopeId}): Error`,
+      Errors.toLogFormat(error)
+    );
+    await remove(item);
+  }
+}

ts/models/conversations.ts

@@ -165,6 +165,12 @@ import OS from '../util/os/osMain';
 import { getMessageAuthorText } from '../util/getMessageAuthorText';
 import { downscaleOutgoingAttachment } from '../util/attachments';
 import { MessageRequestResponseEvent } from '../types/MessageRequestResponseEvent';
+import type { MessageToDelete } from '../textsecure/messageReceiverEvents';
+import {
+  getConversationToDelete,
+  getMessageToDelete,
+} from '../util/deleteForMe';
+import { isEnabled } from '../RemoteConfig';
 import { getCallHistorySelector } from '../state/selectors/callHistory';
 
 /* eslint-disable more/no-then */
@@ -186,6 +192,7 @@ const {
   getOlderMessagesByConversation,
   getMessageMetricsForConversation,
   getMessageById,
+  getMostRecentAddressableMessages,
   getNewerMessagesByConversation,
 } = window.Signal.Data;
 
@@ -2234,7 +2241,7 @@ export class ConversationModel extends window.Backbone
         }
 
         if (isDelete) {
-          await this.destroyMessages();
+          await this.destroyMessages({ source: 'message-request' });
           void this.updateLastMessage();
         }
 
@@ -4449,7 +4456,6 @@ export class ConversationModel extends window.Backbone
       source: providedSource,
       fromSync = false,
       isInitialSync = false,
-      fromGroupUpdate = false,
     }: {
       reason: string;
       receivedAt?: number;
@@ -4458,7 +4464,6 @@ export class ConversationModel extends window.Backbone
       source?: string;
       fromSync?: boolean;
       isInitialSync?: boolean;
-      fromGroupUpdate?: boolean;
     }
   ): Promise<boolean | null | MessageModel | void> {
     const isSetByOther = providedSource || providedSentAt !== undefined;
@@ -4554,7 +4559,7 @@ export class ConversationModel extends window.Backbone
       (isInitialSync && isFromSyncOperation) || isFromMe || isNoteToSelf;
 
     const id = generateGuid();
-    const model = new window.Whisper.Message({
+    const attributes = {
       id,
       conversationId: this.id,
       expirationTimerUpdate: {
@@ -4562,7 +4567,6 @@ export class ConversationModel extends window.Backbone
         source,
         sourceServiceId,
         fromSync,
-        fromGroupUpdate,
       },
       flags: Proto.DataMessage.Flags.EXPIRATION_TIMER_UPDATE,
       readStatus: shouldBeRead ? ReadStatus.Read : ReadStatus.Unread,
@@ -4570,18 +4574,18 @@ export class ConversationModel extends window.Backbone
       received_at: receivedAt ?? incrementMessageCounter(),
       seenStatus: shouldBeRead ? SeenStatus.Seen : SeenStatus.Unseen,
       sent_at: sentAt,
-      type: 'timer-notification',
+      timestamp: sentAt,
-      // TODO: DESKTOP-722
+      type: 'timer-notification' as const,
-    } as unknown as MessageAttributesType);
+    };
 
-    await window.Signal.Data.saveMessage(model.attributes, {
+    await window.Signal.Data.saveMessage(attributes, {
       ourAci: window.textsecure.storage.user.getCheckedAci(),
       forceSave: true,
     });
 
     const message = window.MessageCache.__DEPRECATED$register(
       id,
-      model,
+      new window.Whisper.Message(attributes),
       'updateExpirationTimer'
     );
 
@@ -4589,7 +4593,7 @@ export class ConversationModel extends window.Backbone
     void this.updateUnread();
 
     log.info(
-      `${logId}: added a notification received_at=${model.get('received_at')}`
+      `${logId}: added a notification received_at=${message.get('received_at')}`
     );
 
     return message;
@@ -4978,7 +4982,29 @@ export class ConversationModel extends window.Backbone
     this.contactCollection!.reset(members);
   }
 
-  async destroyMessages(): Promise<void> {
+  async destroyMessages({
+    source,
+  }: {
+    source: 'message-request' | 'local-delete-sync' | 'local-delete';
+  }): Promise<void> {
+    const logId = `destroyMessages(${this.idForLogging()})/${source}`;
+
+    log.info(`${logId}: Queuing job on conversation`);
+
+    await this.queueJob(logId, async () => {
+      log.info(`${logId}: Starting...`);
+
+      await this.destroyMessagesInner({ logId, source });
+    });
+  }
+
+  async destroyMessagesInner({
+    logId,
+    source,
+  }: {
+    logId: string;
+    source: 'message-request' | 'local-delete-sync' | 'local-delete';
+  }): Promise<void> {
     this.set({
       lastMessage: null,
       lastMessageAuthor: null,
@@ -4988,9 +5014,50 @@ export class ConversationModel extends window.Backbone
     });
     window.Signal.Data.updateConversation(this.attributes);
 
-    await window.Signal.Data.removeAllMessagesInConversation(this.id, {
+    if (source === 'local-delete' && isEnabled('desktop.deleteSync.send')) {
+      log.info(`${logId}: Preparing sync message`);
+      const timestamp = Date.now();
+
+      const addressableMessages = await getMostRecentAddressableMessages(
+        this.id
+      );
+      const mostRecentMessages: Array<MessageToDelete> = addressableMessages
+        .map(getMessageToDelete)
+        .filter(isNotNil)
+        .slice(0, 5);
+
+      if (mostRecentMessages.length > 0) {
+        await singleProtoJobQueue.add(
+          MessageSender.getDeleteForMeSyncMessage([
+            {
+              type: 'delete-conversation',
+              conversation: getConversationToDelete(this.attributes),
+              isFullDelete: true,
+              mostRecentMessages,
+              timestamp,
+            },
+          ])
+        );
+      } else {
+        await singleProtoJobQueue.add(
+          MessageSender.getDeleteForMeSyncMessage([
+            {
+              type: 'delete-local-conversation',
+              conversation: getConversationToDelete(this.attributes),
+              timestamp,
+            },
+          ])
+        );
+      }
+
+      log.info(`${logId}: Sync message queue complete`);
+    }
+
+    log.info(`${logId}: Starting delete`);
+    await window.Signal.Data.removeMessagesInConversation(this.id, {
       logId: this.idForLogging(),
     });
+    log.info(`${logId}: Delete complete`);
   }
 
   getTitle(options?: { isShort?: boolean }): string {

ts/models/messages.ts

@@ -68,7 +68,11 @@ import {
 } from '../util/whatTypeOfConversation';
 import { handleMessageSend } from '../util/handleMessageSend';
 import { getSendOptions } from '../util/getSendOptions';
-import { modifyTargetMessage } from '../util/modifyTargetMessage';
+import {
+  modifyTargetMessage,
+  ModifyTargetMessageResult,
+} from '../util/modifyTargetMessage';
+
 import {
   getMessagePropStatus,
   hasErrors,
@@ -2177,7 +2181,6 @@ export class MessageModel extends window.Backbone.Model<MessageAttributesType> {
                 receivedAt: message.get('received_at'),
                 receivedAtMS: message.get('received_at_ms'),
                 sentAt: message.get('sent_at'),
-                fromGroupUpdate: isGroupUpdate(message.attributes),
                 reason: idLog,
               });
             } else if (
@@ -2297,7 +2300,11 @@ export class MessageModel extends window.Backbone.Model<MessageAttributesType> {
         }
 
         const isFirstRun = true;
-        await this.modifyTargetMessage(conversation, isFirstRun);
+        const result = await this.modifyTargetMessage(conversation, isFirstRun);
+        if (result === ModifyTargetMessageResult.Deleted) {
+          confirm();
+          return;
+        }
 
         log.info(`${idLog}: Batching save`);
         void this.saveAndNotify(conversation, confirm);
@@ -2320,10 +2327,16 @@ export class MessageModel extends window.Backbone.Model<MessageAttributesType> {
     // Once the message is saved to DB, we queue attachment downloads
     await this.handleAttachmentDownloadsForNewMessage(conversation);
 
-    conversation.trigger('newmessage', this);
+    // We'd like to check for deletions before scheduling downloads, but if an edit comes
-
+    //   in, we want to have kicked off attachment downloads for the original message.
     const isFirstRun = false;
-    await this.modifyTargetMessage(conversation, isFirstRun);
+    const result = await this.modifyTargetMessage(conversation, isFirstRun);
+    if (result === ModifyTargetMessageResult.Deleted) {
+      confirm();
+      return;
+    }
+
+    conversation.trigger('newmessage', this);
 
     if (await shouldReplyNotifyUser(this.attributes, conversation)) {
       await conversation.notify(this);
@@ -2377,7 +2390,7 @@ export class MessageModel extends window.Backbone.Model<MessageAttributesType> {
   async modifyTargetMessage(
     conversation: ConversationModel,
     isFirstRun: boolean
-  ): Promise<void> {
+  ): Promise<ModifyTargetMessageResult> {
     return modifyTargetMessage(this, conversation, {
       isFirstRun,
       skipEdits: false,

ts/sql/Client.ts

@@ -115,7 +115,7 @@ const exclusiveInterface: ClientExclusiveInterface = {
   flushUpdateConversationBatcher,
 
   shutdown,
-  removeAllMessagesInConversation,
+  removeMessagesInConversation,
 
   removeOtherData,
   cleanupOrphanedAttachments,
@@ -592,6 +592,21 @@ async function removeMessage(id: string): Promise<void> {
   }
 }
 
+export async function deleteAndCleanup(
+  messages: Array<MessageAttributesType>,
+  logId: string
+): Promise<void> {
+  const ids = messages.map(message => message.id);
+
+  log.info(`deleteAndCleanup/${logId}: Deleting ${ids.length} messages...`);
+  await channels.removeMessages(ids);
+
+  log.info(`deleteAndCleanup/${logId}: Cleanup for ${ids.length} messages...`);
+  await _cleanupMessages(messages);
+
+  log.info(`deleteAndCleanup/${logId}: Complete`);
+}
+
 async function _cleanupMessages(
   messages: ReadonlyArray<MessageAttributesType>
 ): Promise<void> {
@@ -664,12 +679,14 @@ async function getConversationRangeCenteredOnMessage(
   };
 }
 
-async function removeAllMessagesInConversation(
+async function removeMessagesInConversation(
   conversationId: string,
   {
     logId,
+    receivedAt,
   }: {
     logId: string;
+    receivedAt?: number;
   }
 ): Promise<void> {
   let messages;
@@ -685,6 +702,7 @@ async function removeAllMessagesInConversation(
       conversationId,
       limit: chunkSize,
       includeStoryReplies: true,
+      receivedAt,
       storyId: undefined,
     });
 
@@ -692,15 +710,8 @@ async function removeAllMessagesInConversation(
       return;
     }
 
-    const ids = messages.map(message => message.id);
-
-    log.info(`removeAllMessagesInConversation/${logId}: Cleanup...`);
     // eslint-disable-next-line no-await-in-loop
-    await _cleanupMessages(messages);
+    await deleteAndCleanup(messages, logId);
-
-    log.info(`removeAllMessagesInConversation/${logId}: Deleting...`);
-    // eslint-disable-next-line no-await-in-loop
-    await channels.removeMessages(ids);
   } while (messages.length > 0);
 }
 

ts/sql/Interface.ts

@@ -32,6 +32,7 @@ import type {
 import type { CallLinkStateType, CallLinkType } from '../types/CallLink';
 import type { AttachmentDownloadJobType } from '../types/AttachmentDownload';
 import type { GroupSendEndorsementsData } from '../types/GroupSendEndorsements';
+import type { SyncTaskType } from '../util/syncTasks';
 
 export type AdjacentMessagesByConversationOptionsType = Readonly<{
   conversationId: string;
@@ -716,6 +717,15 @@ export type DataInterface = {
     ourAci: AciString,
     opts: EditedMessageType
   ) => Promise<void>;
+  getMostRecentAddressableMessages: (
+    conversationId: string,
+    limit?: number
+  ) => Promise<Array<MessageType>>;
+
+  removeSyncTaskById: (id: string) => Promise<void>;
+  saveSyncTasks: (tasks: Array<SyncTaskType>) => Promise<void>;
+  getAllSyncTasks: () => Promise<Array<SyncTaskType>>;
+
   getUnprocessedCount: () => Promise<number>;
   getUnprocessedByIdsAndIncrementAttempts: (
     ids: ReadonlyArray<string>
@@ -1043,10 +1053,11 @@ export type ClientExclusiveInterface = {
   // Client-side only
 
   shutdown: () => Promise<void>;
-  removeAllMessagesInConversation: (
+  removeMessagesInConversation: (
     conversationId: string,
     options: {
       logId: string;
+      receivedAt?: number;
     }
   ) => Promise<void>;
   removeOtherData: () => Promise<void>;

ts/sql/Server.ts

@@ -184,6 +184,9 @@ import {
   attachmentDownloadJobSchema,
   type AttachmentDownloadJobType,
 } from '../types/AttachmentDownload';
+import { MAX_SYNC_TASK_ATTEMPTS } from '../util/syncTasks.types';
+import type { SyncTaskType } from '../util/syncTasks';
+import { isMoreRecentThan } from '../util/timestamp';
 
 type ConversationRow = Readonly<{
   json: string;
@@ -360,6 +363,11 @@ const dataInterface: ServerInterface = {
   getMessagesBetween,
   getNearbyMessageFromDeletedSet,
   saveEditedMessage,
+  getMostRecentAddressableMessages,
+
+  removeSyncTaskById,
+  saveSyncTasks,
+  getAllSyncTasks,
 
   getUnprocessedCount,
   getUnprocessedByIdsAndIncrementAttempts,
@@ -2066,6 +2074,131 @@ function hasUserInitiatedMessages(conversationId: string): boolean {
   return exists !== 0;
 }
 
+async function getMostRecentAddressableMessages(
+  conversationId: string,
+  limit = 5
+): Promise<Array<MessageType>> {
+  const db = getReadonlyInstance();
+  return getMostRecentAddressableMessagesSync(db, conversationId, limit);
+}
+
+export function getMostRecentAddressableMessagesSync(
+  db: Database,
+  conversationId: string,
+  limit = 5
+): Array<MessageType> {
+  const [query, parameters] = sql`
+    SELECT json FROM messages
+    INDEXED BY messages_by_date_addressable
+    WHERE
+      conversationId IS ${conversationId} AND
+      isAddressableMessage = 1
+    ORDER BY received_at DESC, sent_at DESC
+    LIMIT ${limit};
+  `;
+
+  const rows = db.prepare(query).all(parameters);
+
+  return rows.map(row => jsonToObject(row.json));
+}
+
+async function removeSyncTaskById(id: string): Promise<void> {
+  const db = await getWritableInstance();
+  removeSyncTaskByIdSync(db, id);
+}
+export function removeSyncTaskByIdSync(db: Database, id: string): void {
+  const [query, parameters] = sql`
+    DELETE FROM syncTasks
+    WHERE id IS ${id}
+  `;
+
+  db.prepare(query).run(parameters);
+}
+async function saveSyncTasks(tasks: Array<SyncTaskType>): Promise<void> {
+  const db = await getWritableInstance();
+  return saveSyncTasksSync(db, tasks);
+}
+export function saveSyncTasksSync(
+  db: Database,
+  tasks: Array<SyncTaskType>
+): void {
+  return db.transaction(() => {
+    tasks.forEach(task => assertSync(saveSyncTaskSync(db, task)));
+  })();
+}
+export function saveSyncTaskSync(db: Database, task: SyncTaskType): void {
+  const { id, attempts, createdAt, data, envelopeId, sentAt, type } = task;
+
+  const [query, parameters] = sql`
+    INSERT INTO syncTasks (
+      id,
+      attempts,
+      createdAt,
+      data,
+      envelopeId,
+      sentAt,
+      type
+    ) VALUES (
+      ${id},
+      ${attempts},
+      ${createdAt},
+      ${objectToJSON(data)},
+      ${envelopeId},
+      ${sentAt},
+      ${type}
+    )
+  `;
+
+  db.prepare(query).run(parameters);
+}
+async function getAllSyncTasks(): Promise<Array<SyncTaskType>> {
+  const db = await getWritableInstance();
+  return getAllSyncTasksSync(db);
+}
+export function getAllSyncTasksSync(db: Database): Array<SyncTaskType> {
+  return db.transaction(() => {
+    const [selectAllQuery] = sql`
+      SELECT * FROM syncTasks ORDER BY createdAt ASC, sentAt ASC, id ASC
+    `;
+
+    const rows = db.prepare(selectAllQuery).all();
+
+    const tasks: Array<SyncTaskType> = rows.map(row => ({
+      ...row,
+      data: jsonToObject(row.data),
+    }));
+
+    const [query] = sql`
+      UPDATE syncTasks
+      SET attempts = attempts + 1
+    `;
+    db.prepare(query).run();
+
+    const [toDelete, toReturn] = partition(tasks, task => {
+      if (
+        isNormalNumber(task.attempts) &&
+        task.attempts < MAX_SYNC_TASK_ATTEMPTS
+      ) {
+        return false;
+      }
+      if (isMoreRecentThan(task.createdAt, durations.WEEK)) {
+        return false;
+      }
+
+      return true;
+    });
+
+    if (toDelete.length > 0) {
+      log.warn(`getAllSyncTasks: Removing ${toDelete.length} expired tasks`);
+      toDelete.forEach(task => {
+        assertSync(removeSyncTaskByIdSync(db, task.id));
+      });
+    }
+
+    return toReturn;
+  })();
+}
+
 function saveMessageSync(
   db: Database,
   data: MessageType,
@@ -6036,6 +6169,7 @@ async function removeAll(): Promise<void> {
       DELETE FROM storyDistributionMembers;
       DELETE FROM storyDistributions;
       DELETE FROM storyReads;
+      DELETE FROM syncTasks;
       DELETE FROM unprocessed;
       DELETE FROM uninstalled_sticker_packs;
 
@@ -6078,6 +6212,7 @@ async function removeAllConfiguration(): Promise<void> {
       DELETE FROM sendLogRecipients;
       DELETE FROM sessions;
       DELETE FROM signedPreKeys;
+      DELETE FROM syncTasks;
       DELETE FROM unprocessed;
       `
     );

ts/sql/migrations/1060-addressable-messages-and-sync-tasks.ts

@@ -0,0 +1,56 @@
+// Copyright 2024 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import type { Database } from '@signalapp/better-sqlite3';
+
+import type { LoggerType } from '../../types/Logging';
+
+export const version = 1060;
+
+export function updateToSchemaVersion1060(
+  currentVersion: number,
+  db: Database,
+  logger: LoggerType
+): void {
+  if (currentVersion >= 1060) {
+    return;
+  }
+
+  db.transaction(() => {
+    db.exec(`
+      ALTER TABLE messages
+        ADD COLUMN isAddressableMessage INTEGER
+        GENERATED ALWAYS AS (
+          type IS NULL
+          OR
+          type IN (
+            'incoming',
+            'outgoing'
+          )
+        );
+     
+      CREATE INDEX messages_by_date_addressable
+        ON messages (
+          conversationId, isAddressableMessage, received_at, sent_at
+      );
+
+      CREATE TABLE syncTasks(
+        id TEXT PRIMARY KEY NOT NULL,
+        attempts INTEGER NOT NULL,
+        createdAt INTEGER NOT NULL,
+        data TEXT NOT NULL,
+        envelopeId TEXT NOT NULL,
+        sentAt INTEGER NOT NULL,
+        type TEXT NOT NULL
+      ) STRICT;
+
+      CREATE INDEX syncTasks_order ON syncTasks (
+        createdAt, sentAt, id
+      )
+    `);
+  })();
+
+  db.pragma('user_version = 1060');
+
+  logger.info('updateToSchemaVersion1060: success!');
+}

ts/sql/migrations/index.ts

@@ -80,10 +80,11 @@ import { updateToSchemaVersion1010 } from './1010-call-links-table';
 import { updateToSchemaVersion1020 } from './1020-self-merges';
 import { updateToSchemaVersion1030 } from './1030-unblock-event';
 import { updateToSchemaVersion1040 } from './1040-undownloaded-backed-up-media';
+import { updateToSchemaVersion1050 } from './1050-group-send-endorsements';
 import {
-  updateToSchemaVersion1050,
+  updateToSchemaVersion1060,
   version as MAX_VERSION,
-} from './1050-group-send-endorsements';
+} from './1060-addressable-messages-and-sync-tasks';
 
 function updateToSchemaVersion1(
   currentVersion: number,
@@ -2025,12 +2026,14 @@ export const SCHEMA_VERSIONS = [
   updateToSchemaVersion970,
   updateToSchemaVersion980,
   updateToSchemaVersion990,
+
   updateToSchemaVersion1000,
   updateToSchemaVersion1010,
   updateToSchemaVersion1020,
   updateToSchemaVersion1030,
   updateToSchemaVersion1040,
   updateToSchemaVersion1050,
+  updateToSchemaVersion1060,
 ];
 
 export class DBVersionFromFutureError extends Error {

ts/state/ducks/conversations.ts

@@ -3,6 +3,7 @@
 
 import type { ThunkAction } from 'redux-thunk';
 import {
+  chunk,
   difference,
   fromPairs,
   isEqual,
@@ -184,6 +185,16 @@ import { getConversationIdForLogging } from '../../util/idForLogging';
 import { singleProtoJobQueue } from '../../jobs/singleProtoJobQueue';
 import MessageSender from '../../textsecure/SendMessage';
 import { AttachmentDownloadUrgency } from '../../jobs/AttachmentDownloadManager';
+import type {
+  DeleteForMeSyncEventData,
+  MessageToDelete,
+} from '../../textsecure/messageReceiverEvents';
+import {
+  getConversationToDelete,
+  getMessageToDelete,
+} from '../../util/deleteForMe';
+import { MAX_MESSAGE_COUNT } from '../../util/deleteForMe.types';
+import { isEnabled } from '../../RemoteConfig';
 
 // State
 
@@ -1703,8 +1714,10 @@ function deleteMessages({
       throw new Error('deleteMessage: No conversation found');
     }
 
+    const messages = (
       await Promise.all(
-      messageIds.map(async messageId => {
+        messageIds.map(
+          async (messageId): Promise<MessageToDelete | undefined> => {
             const message = await __DEPRECATED$getMessageById(messageId);
             if (!message) {
               throw new Error(`deleteMessages: Message ${messageId} missing!`);
@@ -1716,8 +1729,12 @@ function deleteMessages({
                 `deleteMessages: message conversation ${messageConversationId} doesn't match provided conversation ${conversationId}`
               );
             }
-      })
+
-    );
+            return getMessageToDelete(message.attributes);
+          }
+        )
+      )
+    ).filter(isNotNil);
 
     let nearbyMessageId: string | null = null;
 
@@ -1743,6 +1760,34 @@ function deleteMessages({
     if (nearbyMessageId != null) {
       dispatch(scrollToMessage(conversationId, nearbyMessageId));
     }
+
+    if (!isEnabled('desktop.deleteSync.send')) {
+      return;
+    }
+    if (messages.length === 0) {
+      return;
+    }
+
+    const chunks = chunk(messages, MAX_MESSAGE_COUNT);
+    const conversationToDelete = getConversationToDelete(
+      conversation.attributes
+    );
+    const timestamp = Date.now();
+
+    await Promise.all(
+      chunks.map(async items => {
+        const data: DeleteForMeSyncEventData = items.map(item => ({
+          conversation: conversationToDelete,
+          message: item,
+          timestamp,
+          type: 'delete-message' as const,
+        }));
+
+        await singleProtoJobQueue.add(
+          MessageSender.getDeleteForMeSyncMessage(data)
+        );
+      })
+    );
   };
 }
 
@@ -1770,7 +1815,7 @@ function destroyMessages(
           undefined
         );
 
-        await conversation.destroyMessages();
+        await conversation.destroyMessages({ source: 'local-delete' });
         drop(conversation.updateLastMessage());
       },
     });

ts/state/selectors/items.ts

@@ -127,6 +127,13 @@ export const isInternalUser = createSelector(
   }
 );
 
+export const getDeleteSyncSendEnabled = createSelector(
+  getRemoteConfig,
+  (remoteConfig: ConfigMapType): boolean => {
+    return isRemoteConfigFlagEnabled(remoteConfig, 'desktop.deleteSync.send');
+  }
+);
+
 // Note: ts/util/stories is the other place this check is done
 export const getStoriesEnabled = createSelector(
   getItems,
@@ -242,3 +249,9 @@ export const getShowStickerPickerHint = createSelector(
     return state.showStickerPickerHint ?? false;
   }
 );
+
+export const getLocalDeleteWarningShown = createSelector(
+  getItems,
+  (state: ItemsStateType): boolean =>
+    Boolean(state.localDeleteWarningShown ?? false)
+);

ts/state/smart/ConversationHeader.tsx

@@ -40,6 +40,11 @@ import {
 } from '../selectors/conversations';
 import { getHasStoriesSelector } from '../selectors/stories2';
 import { getIntl, getTheme, getUserACI } from '../selectors/user';
+import { useItemsActions } from '../ducks/items';
+import {
+  getDeleteSyncSendEnabled,
+  getLocalDeleteWarningShown,
+} from '../selectors/items';
 
 export type OwnProps = {
   id: string;
@@ -146,6 +151,7 @@ export const SmartConversationHeader = memo(function SmartConversationHeader({
   const conversationName = useContactNameData(conversation);
   strictAssert(conversationName, 'conversationName is required');
 
+  const isDeleteSyncSendEnabled = useSelector(getDeleteSyncSendEnabled);
   const isMissingMandatoryProfileSharing =
     getIsMissingRequiredProfileSharing(conversation);
 
@@ -248,6 +254,11 @@ export const SmartConversationHeader = memo(function SmartConversationHeader({
 
   const minimalConversation = useMinimalConversation(conversation);
 
+  const localDeleteWarningShown = useSelector(getLocalDeleteWarningShown);
+  const { putItem } = useItemsActions();
+  const setLocalDeleteWarningShown = () =>
+    putItem('localDeleteWarningShown', true);
+
   return (
     <ConversationHeader
       addedByName={addedByName}
@@ -258,6 +269,8 @@ export const SmartConversationHeader = memo(function SmartConversationHeader({
       hasPanelShowing={hasPanelShowing}
       hasStories={hasStories}
       i18n={i18n}
+      localDeleteWarningShown={localDeleteWarningShown}
+      isDeleteSyncSendEnabled={isDeleteSyncSendEnabled}
       isMissingMandatoryProfileSharing={isMissingMandatoryProfileSharing}
       isSelectMode={isSelectMode}
       isSignalConversation={isSignalConversation(conversation)}
@@ -287,6 +300,7 @@ export const SmartConversationHeader = memo(function SmartConversationHeader({
       onViewRecentMedia={onViewRecentMedia}
       onViewUserStories={onViewUserStories}
       outgoingCallButtonStyle={outgoingCallButtonStyle}
+      setLocalDeleteWarningShown={setLocalDeleteWarningShown}
       sharedGroupNames={conversation.sharedGroupNames}
       theme={theme}
     />

ts/state/smart/DeleteMessagesModal.tsx

@@ -16,6 +16,12 @@ import {
   getLastSelectedMessage,
 } from '../selectors/conversations';
 import { getDeleteMessagesProps } from '../selectors/globalModals';
+import { useItemsActions } from '../ducks/items';
+import {
+  getLocalDeleteWarningShown,
+  getDeleteSyncSendEnabled,
+} from '../selectors/items';
+import { LocalDeleteWarningModal } from '../../components/LocalDeleteWarningModal';
 
 export const SmartDeleteMessagesModal = memo(
   function SmartDeleteMessagesModal() {
@@ -36,6 +42,7 @@ export const SmartDeleteMessagesModal = memo(
       [messageIds, isMe]
     );
     const canDeleteForEveryone = useSelector(getCanDeleteForEveryone);
+    const isDeleteSyncSendEnabled = useSelector(getDeleteSyncSendEnabled);
     const lastSelectedMessage = useSelector(getLastSelectedMessage);
     const i18n = useSelector(getIntl);
     const { toggleDeleteMessagesModal } = useGlobalModalActions();
@@ -69,11 +76,25 @@ export const SmartDeleteMessagesModal = memo(
       onDelete?.();
     }, [deleteMessagesForEveryone, messageIds, onDelete]);
 
+    const localDeleteWarningShown = useSelector(getLocalDeleteWarningShown);
+    const { putItem } = useItemsActions();
+    if (!localDeleteWarningShown && isDeleteSyncSendEnabled) {
+      return (
+        <LocalDeleteWarningModal
+          i18n={i18n}
+          onClose={() => {
+            putItem('localDeleteWarningShown', true);
+          }}
+        />
+      );
+    }
+
     return (
       <DeleteMessagesModal
         isMe={isMe}
         canDeleteForEveryone={canDeleteForEveryone}
         i18n={i18n}
+        isDeleteSyncSendEnabled={isDeleteSyncSendEnabled}
         messageCount={messageCount}
         onClose={handleClose}
         onDeleteForMe={handleDeleteForMe}

ts/test-electron/textsecure/KeyChangeListener_test.ts

@@ -67,7 +67,7 @@ describe('KeyChangeListener', () => {
   });
 
   afterEach(async () => {
-    await window.Signal.Data.removeAllMessagesInConversation(convo.id, {
+    await window.Signal.Data.removeMessagesInConversation(convo.id, {
       logId: ourServiceIdWithKeyChange,
     });
     await window.Signal.Data.removeConversation(convo.id);
@@ -104,7 +104,7 @@ describe('KeyChangeListener', () => {
     });
 
     afterEach(async () => {
-      await window.Signal.Data.removeAllMessagesInConversation(groupConvo.id, {
+      await window.Signal.Data.removeMessagesInConversation(groupConvo.id, {
         logId: ourServiceIdWithKeyChange,
       });
       await window.Signal.Data.removeConversation(groupConvo.id);

ts/test-node/sql/migration_1060_test.ts

@@ -0,0 +1,302 @@
+// Copyright 2024 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { assert } from 'chai';
+import type { Database } from '@signalapp/better-sqlite3';
+import SQL from '@signalapp/better-sqlite3';
+import { v4 as generateGuid } from 'uuid';
+
+import {
+  getAllSyncTasksSync,
+  getMostRecentAddressableMessagesSync,
+  removeSyncTaskByIdSync,
+  saveSyncTasksSync,
+} from '../../sql/Server';
+import { insertData, updateToVersion } from './helpers';
+import { MAX_SYNC_TASK_ATTEMPTS } from '../../util/syncTasks.types';
+import { WEEK } from '../../util/durations';
+
+import type { MessageAttributesType } from '../../model-types';
+import type { SyncTaskType } from '../../util/syncTasks';
+
+/* eslint-disable camelcase */
+
+function generateMessage(json: MessageAttributesType) {
+  const { conversationId, received_at, sent_at, type } = json;
+
+  return {
+    conversationId,
+    json,
+    received_at,
+    sent_at,
+    type,
+  };
+}
+
+describe('SQL/updateToSchemaVersion1060', () => {
+  let db: Database;
+  beforeEach(() => {
+    db = new SQL(':memory:');
+    updateToVersion(db, 1060);
+  });
+
+  afterEach(() => {
+    db.close();
+  });
+
+  describe('Addressable Messages', () => {
+    describe('Storing of new attachment jobs', () => {
+      it('returns only incoming/outgoing messages', () => {
+        const conversationId = generateGuid();
+        const otherConversationId = generateGuid();
+
+        insertData(db, 'messages', [
+          generateMessage({
+            id: '1',
+            conversationId,
+            type: 'incoming',
+            received_at: 1,
+            sent_at: 1,
+            timestamp: 1,
+          }),
+          generateMessage({
+            id: '2',
+            conversationId,
+            type: 'story',
+            received_at: 2,
+            sent_at: 2,
+            timestamp: 2,
+          }),
+          generateMessage({
+            id: '3',
+            conversationId,
+            type: 'outgoing',
+            received_at: 3,
+            sent_at: 3,
+            timestamp: 3,
+          }),
+          generateMessage({
+            id: '4',
+            conversationId,
+            type: 'group-v1-migration',
+            received_at: 4,
+            sent_at: 4,
+            timestamp: 4,
+          }),
+          generateMessage({
+            id: '5',
+            conversationId,
+            type: 'group-v2-change',
+            received_at: 5,
+            sent_at: 5,
+            timestamp: 5,
+          }),
+          generateMessage({
+            id: '6',
+            conversationId,
+            type: 'incoming',
+            received_at: 6,
+            sent_at: 6,
+            timestamp: 6,
+          }),
+          generateMessage({
+            id: '7',
+            conversationId,
+            type: 'profile-change',
+            received_at: 7,
+            sent_at: 7,
+            timestamp: 7,
+          }),
+          generateMessage({
+            id: '8',
+            conversationId: otherConversationId,
+            type: 'incoming',
+            received_at: 8,
+            sent_at: 8,
+            timestamp: 8,
+          }),
+        ]);
+
+        const messages = getMostRecentAddressableMessagesSync(
+          db,
+          conversationId
+        );
+
+        assert.lengthOf(messages, 3);
+        assert.deepEqual(messages, [
+          {
+            id: '6',
+            conversationId,
+            type: 'incoming',
+            received_at: 6,
+            sent_at: 6,
+            timestamp: 6,
+          },
+          {
+            id: '3',
+            conversationId,
+            type: 'outgoing',
+            received_at: 3,
+            sent_at: 3,
+            timestamp: 3,
+          },
+          {
+            id: '1',
+            conversationId,
+            type: 'incoming',
+            received_at: 1,
+            sent_at: 1,
+            timestamp: 1,
+          },
+        ]);
+      });
+
+      it('ensures that index is used for getMostRecentAddressableMessagesSync, with storyId', () => {
+        const { detail } = db
+          .prepare(
+            `
+          EXPLAIN QUERY PLAN
+          SELECT json FROM messages
+          INDEXED BY messages_by_date_addressable
+          WHERE
+            conversationId IS 'not-important' AND
+            isAddressableMessage = 1
+          ORDER BY received_at DESC, sent_at DESC
+          LIMIT 5;
+          `
+          )
+          .get();
+
+        assert.notInclude(detail, 'B-TREE');
+        assert.notInclude(detail, 'SCAN');
+        assert.include(
+          detail,
+          'SEARCH messages USING INDEX messages_by_date_addressable (conversationId=? AND isAddressableMessage=?)'
+        );
+      });
+    });
+  });
+
+  describe('Sync Tasks', () => {
+    it('creates tasks in bulk, and fetches all', () => {
+      const now = Date.now();
+      const expected: Array<SyncTaskType> = [
+        {
+          id: generateGuid(),
+          attempts: 1,
+          createdAt: now + 1,
+          data: {
+            jsonField: 'one',
+            data: 1,
+          },
+          envelopeId: 'envelope-id-1',
+          sentAt: 1,
+          type: 'delete-conversation',
+        },
+        {
+          id: generateGuid(),
+          attempts: 2,
+          createdAt: now + 2,
+          data: {
+            jsonField: 'two',
+            data: 2,
+          },
+          envelopeId: 'envelope-id-2',
+          sentAt: 2,
+          type: 'delete-conversation',
+        },
+        {
+          id: generateGuid(),
+          attempts: 3,
+          createdAt: now + 3,
+          data: {
+            jsonField: 'three',
+            data: 3,
+          },
+          envelopeId: 'envelope-id-3',
+          sentAt: 3,
+          type: 'delete-conversation',
+        },
+      ];
+
+      saveSyncTasksSync(db, expected);
+
+      const actual = getAllSyncTasksSync(db);
+      assert.deepEqual(expected, actual, 'before delete');
+
+      removeSyncTaskByIdSync(db, expected[1].id);
+
+      const actualAfterDelete = getAllSyncTasksSync(db);
+      assert.deepEqual(
+        [
+          { ...expected[0], attempts: 2 },
+          { ...expected[2], attempts: 4 },
+        ],
+        actualAfterDelete,
+        'after delete'
+      );
+    });
+
+    it('getAllSyncTasksSync expired tasks', () => {
+      const now = Date.now();
+      const twoWeeksAgo = now - WEEK * 2;
+      const expected: Array<SyncTaskType> = [
+        {
+          id: generateGuid(),
+          attempts: MAX_SYNC_TASK_ATTEMPTS,
+          createdAt: twoWeeksAgo,
+          data: {
+            jsonField: 'expired',
+            data: 1,
+          },
+          envelopeId: 'envelope-id-1',
+          sentAt: 1,
+          type: 'delete-conversation',
+        },
+        {
+          id: generateGuid(),
+          attempts: 2,
+          createdAt: twoWeeksAgo,
+          data: {
+            jsonField: 'old-but-few-attemts',
+            data: 2,
+          },
+          envelopeId: 'envelope-id-2',
+          sentAt: 2,
+          type: 'delete-conversation',
+        },
+        {
+          id: generateGuid(),
+          attempts: MAX_SYNC_TASK_ATTEMPTS * 2,
+          createdAt: now,
+          data: {
+            jsonField: 'new-but-many-attempts',
+            data: 3,
+          },
+          envelopeId: 'envelope-id-3',
+          sentAt: 3,
+          type: 'delete-conversation',
+        },
+        {
+          id: generateGuid(),
+          attempts: MAX_SYNC_TASK_ATTEMPTS - 1,
+          createdAt: now + 1,
+          data: {
+            jsonField: 'new-and-fresh',
+            data: 4,
+          },
+          envelopeId: 'envelope-id-4',
+          sentAt: 4,
+          type: 'delete-conversation',
+        },
+      ];
+
+      saveSyncTasksSync(db, expected);
+
+      const actual = getAllSyncTasksSync(db);
+
+      assert.lengthOf(actual, 3);
+      assert.deepEqual([expected[1], expected[2], expected[3]], actual);
+    });
+  });
+});

ts/textsecure/MessageReceiver.ts

@@ -130,6 +130,13 @@ import {
   StoryRecipientUpdateEvent,
   CallLogEventSyncEvent,
   CallLinkUpdateSyncEvent,
+  DeleteForMeSyncEvent,
+} from './messageReceiverEvents';
+import type {
+  MessageToDelete,
+  DeleteForMeSyncEventData,
+  DeleteForMeSyncTarget,
+  ConversationToDelete,
 } from './messageReceiverEvents';
 import * as log from '../logging/log';
 import * as durations from '../util/durations';
@@ -686,6 +693,11 @@ export default class MessageReceiver
     handler: (ev: CallLogEventSyncEvent) => void
   ): void;
 
+  public override addEventListener(
+    name: 'deleteForMeSync',
+    handler: (ev: DeleteForMeSyncEvent) => void
+  ): void;
+
   public override addEventListener(name: string, handler: EventHandler): void {
     return super.addEventListener(name, handler);
   }
@@ -3165,6 +3177,9 @@ export default class MessageReceiver
     if (syncMessage.callLogEvent) {
       return this.handleCallLogEvent(envelope, syncMessage.callLogEvent);
     }
+    if (syncMessage.deleteForMe) {
+      return this.handleDeleteForMeSync(envelope, syncMessage.deleteForMe);
+    }
 
     this.removeFromCache(envelope);
     const envelopeId = getEnvelopeId(envelope);
@@ -3615,6 +3630,118 @@ export default class MessageReceiver
     log.info('handleCallLogEvent: finished');
   }
 
+  private async handleDeleteForMeSync(
+    envelope: ProcessedEnvelope,
+    deleteSync: Proto.SyncMessage.IDeleteForMe
+  ): Promise<void> {
+    const logId = getEnvelopeId(envelope);
+    log.info('MessageReceiver.handleDeleteForMeSync', logId);
+
+    logUnexpectedUrgentValue(envelope, 'deleteForMeSync');
+
+    const { timestamp } = envelope;
+    let eventData: DeleteForMeSyncEventData = [];
+
+    try {
+      if (deleteSync.messageDeletes?.length) {
+        const messageDeletes: Array<DeleteForMeSyncTarget> =
+          deleteSync.messageDeletes
+            .flatMap((item): Array<DeleteForMeSyncTarget> | undefined => {
+              const messages = item.messages
+                ?.map(message => processMessageToDelete(message, logId))
+                .filter(isNotNil);
+              const conversation = item.conversation
+                ? processConversationToDelete(item.conversation, logId)
+                : undefined;
+
+              if (messages?.length && conversation) {
+                // We want each message in its own task
+                return messages.map(innerItem => {
+                  return {
+                    type: 'delete-message' as const,
+                    message: innerItem,
+                    conversation,
+                    timestamp,
+                  };
+                });
+              }
+
+              return undefined;
+            })
+            .filter(isNotNil);
+
+        eventData = eventData.concat(messageDeletes);
+      }
+      if (deleteSync.conversationDeletes?.length) {
+        const conversationDeletes: Array<DeleteForMeSyncTarget> =
+          deleteSync.conversationDeletes
+            .map(item => {
+              const mostRecentMessages = item.mostRecentMessages
+                ?.map(message => processMessageToDelete(message, logId))
+                .filter(isNotNil);
+              const conversation = item.conversation
+                ? processConversationToDelete(item.conversation, logId)
+                : undefined;
+
+              if (mostRecentMessages?.length && conversation) {
+                return {
+                  type: 'delete-conversation' as const,
+                  conversation,
+                  isFullDelete: Boolean(item.isFullDelete),
+                  mostRecentMessages,
+                  timestamp,
+                };
+              }
+
+              return undefined;
+            })
+            .filter(isNotNil);
+
+        eventData = eventData.concat(conversationDeletes);
+      }
+      if (deleteSync.localOnlyConversationDeletes?.length) {
+        const localOnlyConversationDeletes: Array<DeleteForMeSyncTarget> =
+          deleteSync.localOnlyConversationDeletes
+            .map(item => {
+              const conversation = item.conversation
+                ? processConversationToDelete(item.conversation, logId)
+                : undefined;
+
+              if (conversation) {
+                return {
+                  type: 'delete-local-conversation' as const,
+                  conversation,
+                  timestamp,
+                };
+              }
+
+              return undefined;
+            })
+            .filter(isNotNil);
+
+        eventData = eventData.concat(localOnlyConversationDeletes);
+      }
+      if (!eventData.length) {
+        throw new Error(`${logId}: Nothing found in sync message!`);
+      }
+    } catch (error: unknown) {
+      this.removeFromCache(envelope);
+
+      throw error;
+    }
+
+    const deleteSyncEventSync = new DeleteForMeSyncEvent(
+      eventData,
+      timestamp,
+      envelope.id,
+      this.removeFromCache.bind(this, envelope)
+    );
+
+    await this.dispatchAndWait(logId, deleteSyncEventSync);
+
+    log.info('handleDeleteForMeSync: finished');
+  }
+
   private async handleContacts(
     envelope: ProcessedEnvelope,
     contactSyncProto: Proto.SyncMessage.IContacts
@@ -3820,3 +3947,70 @@ function envelopeTypeToCiphertextType(type: number | undefined): number {
 
   throw new Error(`envelopeTypeToCiphertextType: Unknown type ${type}`);
 }
+
+function processMessageToDelete(
+  target: Proto.SyncMessage.DeleteForMe.IAddressableMessage,
+  logId: string
+): MessageToDelete | undefined {
+  const sentAt = target.sentTimestamp?.toNumber();
+  if (!isNumber(sentAt)) {
+    log.warn(
+      `${logId}/processMessageToDelete: No sentTimestamp found! Dropping AddressableMessage.`
+    );
+    return undefined;
+  }
+
+  if (target.authorAci) {
+    return {
+      type: 'aci' as const,
+      authorAci: normalizeAci(
+        target.authorAci,
+        `${logId}/processMessageToDelete`
+      ),
+      sentAt,
+    };
+  }
+  if (target.authorE164) {
+    return {
+      type: 'e164' as const,
+      authorE164: target.authorE164,
+      sentAt,
+    };
+  }
+
+  log.warn(
+    `${logId}/processMessageToDelete: No author field found! Dropping AddressableMessage.`
+  );
+  return undefined;
+}
+
+function processConversationToDelete(
+  target: Proto.SyncMessage.DeleteForMe.IConversationIdentifier,
+  logId: string
+): ConversationToDelete | undefined {
+  const { threadAci, threadGroupId, threadE164 } = target;
+
+  if (threadAci) {
+    return {
+      type: 'aci' as const,
+      aci: normalizeAci(threadAci, `${logId}/threadAci`),
+    };
+  }
+  if (threadGroupId) {
+    return {
+      type: 'group' as const,
+      groupId: Buffer.from(threadGroupId).toString('base64'),
+    };
+  }
+  if (threadE164) {
+    return {
+      type: 'e164' as const,
+      e164: threadE164,
+    };
+  }
+
+  log.warn(
+    `${logId}/processConversationToDelete: No identifier field found! Dropping ConversationIdentifier.`
+  );
+  return undefined;
+}

ts/textsecure/SendMessage.ts

@@ -82,6 +82,13 @@ import {
 } from '../types/EmbeddedContact';
 import { missingCaseError } from '../util/missingCaseError';
 import { drop } from '../util/drop';
+import type {
+  ConversationToDelete,
+  DeleteForMeSyncEventData,
+  DeleteMessageSyncTarget,
+  MessageToDelete,
+} from './messageReceiverEvents';
+import { getConversationFromTarget } from '../util/deleteForMe';
 
 export type SendMetadataType = {
   [serviceId: ServiceIdString]: {
@@ -1475,6 +1482,91 @@ export default class MessageSender {
     };
   }
 
+  static getDeleteForMeSyncMessage(
+    data: DeleteForMeSyncEventData
+  ): SingleProtoJobData {
+    const myAci = window.textsecure.storage.user.getCheckedAci();
+
+    const deleteForMe = new Proto.SyncMessage.DeleteForMe();
+    const messageDeletes: Map<
+      string,
+      Array<DeleteMessageSyncTarget>
+    > = new Map();
+
+    data.forEach(item => {
+      if (item.type === 'delete-message') {
+        const conversation = getConversationFromTarget(item.conversation);
+        if (!conversation) {
+          throw new Error(
+            'getDeleteForMeSyncMessage: Failed to find conversation for delete-message'
+          );
+        }
+        const existing = messageDeletes.get(conversation.id);
+        if (existing) {
+          existing.push(item);
+        } else {
+          messageDeletes.set(conversation.id, [item]);
+        }
+      } else if (item.type === 'delete-conversation') {
+        const mostRecentMessages =
+          item.mostRecentMessages.map(toAddressableMessage);
+        const conversation = toConversationIdentifier(item.conversation);
+
+        deleteForMe.conversationDeletes = deleteForMe.conversationDeletes || [];
+        deleteForMe.conversationDeletes.push({
+          mostRecentMessages,
+          conversation,
+          isFullDelete: true,
+        });
+      } else if (item.type === 'delete-local-conversation') {
+        const conversation = toConversationIdentifier(item.conversation);
+
+        deleteForMe.localOnlyConversationDeletes =
+          deleteForMe.localOnlyConversationDeletes || [];
+        deleteForMe.localOnlyConversationDeletes.push({
+          conversation,
+        });
+      } else {
+        throw missingCaseError(item);
+      }
+    });
+
+    if (messageDeletes.size > 0) {
+      for (const items of messageDeletes.values()) {
+        const first = items[0];
+        if (!first) {
+          throw new Error('Failed to fetch first from items');
+        }
+        const messages = items.map(item => toAddressableMessage(item.message));
+        const conversation = toConversationIdentifier(first.conversation);
+
+        deleteForMe.messageDeletes = deleteForMe.messageDeletes || [];
+        deleteForMe.messageDeletes.push({
+          messages,
+          conversation,
+        });
+      }
+    }
+
+    const syncMessage = this.createSyncMessage();
+    syncMessage.deleteForMe = deleteForMe;
+    const contentMessage = new Proto.Content();
+    contentMessage.syncMessage = syncMessage;
+
+    const { ContentHint } = Proto.UnidentifiedSenderMessage.Message;
+
+    return {
+      contentHint: ContentHint.RESENDABLE,
+      serviceId: myAci,
+      isSyncMessage: true,
+      protoBase64: Bytes.toBase64(
+        Proto.Content.encode(contentMessage).finish()
+      ),
+      type: 'deleteForMeSync',
+      urgent: false,
+    };
+  }
+
   async syncReadMessages(
     reads: ReadonlyArray<{
       senderAci?: AciString;
@@ -2253,3 +2345,37 @@ export default class MessageSender {
     return this.server.sendChallengeResponse(challengeResponse);
   }
 }
+
+// Helpers
+
+function toAddressableMessage(message: MessageToDelete) {
+  const targetMessage = new Proto.SyncMessage.DeleteForMe.AddressableMessage();
+  targetMessage.sentTimestamp = Long.fromNumber(message.sentAt);
+
+  if (message.type === 'aci') {
+    targetMessage.authorAci = message.authorAci;
+  } else if (message.type === 'e164') {
+    targetMessage.authorE164 = message.authorE164;
+  } else {
+    throw missingCaseError(message);
+  }
+
+  return targetMessage;
+}
+
+function toConversationIdentifier(conversation: ConversationToDelete) {
+  const targetConversation =
+    new Proto.SyncMessage.DeleteForMe.ConversationIdentifier();
+
+  if (conversation.type === 'aci') {
+    targetConversation.threadAci = conversation.aci;
+  } else if (conversation.type === 'group') {
+    targetConversation.threadGroupId = Bytes.fromBase64(conversation.groupId);
+  } else if (conversation.type === 'e164') {
+    targetConversation.threadE164 = conversation.e164;
+  } else {
+    throw missingCaseError(conversation);
+  }
+
+  return targetConversation;
+}

ts/textsecure/messageReceiverEvents.ts

@@ -3,6 +3,7 @@
 /* eslint-disable max-classes-per-file */
 
 import type { PublicKey } from '@signalapp/libsignal-client';
+import { z } from 'zod';
 
 import type { SignalService as Proto } from '../protobuf';
 import type { ServiceIdString, AciString } from '../types/ServiceId';
@@ -15,6 +16,7 @@ import type {
 import type { ContactDetailsWithAvatar } from './ContactsParser';
 import type { CallEventDetails, CallLogEvent } from '../types/CallDisposition';
 import type { CallLinkUpdateSyncType } from '../types/CallLink';
+import { isAciString } from '../util/isAciString';
 
 export class EmptyEvent extends Event {
   constructor() {
@@ -456,6 +458,78 @@ export class CallLinkUpdateSyncEvent extends ConfirmableEvent {
   }
 }
 
+const messageToDeleteSchema = z.union([
+  z.object({
+    type: z.literal('aci').readonly(),
+    authorAci: z.string().refine(isAciString),
+    sentAt: z.number(),
+  }),
+  z.object({
+    type: z.literal('e164').readonly(),
+    authorE164: z.string(),
+    sentAt: z.number(),
+  }),
+]);
+
+export type MessageToDelete = z.infer<typeof messageToDeleteSchema>;
+
+const conversationToDeleteSchema = z.union([
+  z.object({
+    type: z.literal('group').readonly(),
+    groupId: z.string(),
+  }),
+  z.object({
+    type: z.literal('aci').readonly(),
+    aci: z.string().refine(isAciString),
+  }),
+  z.object({
+    type: z.literal('e164').readonly(),
+    e164: z.string(),
+  }),
+]);
+
+export type ConversationToDelete = z.infer<typeof conversationToDeleteSchema>;
+
+export const deleteMessageSchema = z.object({
+  type: z.literal('delete-message').readonly(),
+  conversation: conversationToDeleteSchema,
+  message: messageToDeleteSchema,
+  timestamp: z.number(),
+});
+export type DeleteMessageSyncTarget = z.infer<typeof deleteMessageSchema>;
+export const deleteConversationSchema = z.object({
+  type: z.literal('delete-conversation').readonly(),
+  conversation: conversationToDeleteSchema,
+  mostRecentMessages: z.array(messageToDeleteSchema),
+  isFullDelete: z.boolean(),
+  timestamp: z.number(),
+});
+export const deleteLocalConversationSchema = z.object({
+  type: z.literal('delete-local-conversation').readonly(),
+  conversation: conversationToDeleteSchema,
+  timestamp: z.number(),
+});
+export const deleteForMeSyncTargetSchema = z.union([
+  deleteMessageSchema,
+  deleteConversationSchema,
+  deleteLocalConversationSchema,
+]);
+
+export type DeleteForMeSyncTarget = z.infer<typeof deleteForMeSyncTargetSchema>;
+
+export type DeleteForMeSyncEventData = ReadonlyArray<DeleteForMeSyncTarget>;
+
+export class DeleteForMeSyncEvent extends ConfirmableEvent {
+  constructor(
+    public readonly deleteForMeSync: DeleteForMeSyncEventData,
+    public readonly timestamp: number,
+    public readonly envelopeId: string,
+    confirm: ConfirmCallback
+  ) {
+    super('deleteForMeSync', confirm);
+  }
+}
+
 export type CallLogEventSyncEventData = Readonly<{
   event: CallLogEvent;
   timestamp: number;

ts/types/Storage.d.ts

@@ -79,6 +79,7 @@ export type StorageAccessType = {
   lastAttemptedToRefreshProfilesAt: number;
   lastResortKeyUpdateTime: number;
   lastResortKeyUpdateTimePNI: number;
+  localDeleteWarningShown: boolean;
   masterKey: string;
   masterKeyLastRequestTime: number;
   maxPreKeyId: number;

ts/types/StorageUIKeys.ts

@@ -23,6 +23,7 @@ export const STORAGE_UI_KEYS: ReadonlyArray<keyof StorageAccessType> = [
   'hasCompletedSafetyNumberOnboarding',
   'hasCompletedUsernameLinkOnboarding',
   'hide-menu-bar',
+  'localDeleteWarningShown',
   'incoming-call-notification',
   'navTabsCollapsed',
   'notification-draw-attention',

ts/util/deleteForMe.ts

@@ -0,0 +1,261 @@
+// Copyright 2020 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { last, sortBy } from 'lodash';
+
+import * as log from '../logging/log';
+import { isAciString } from './isAciString';
+import { isGroup, isGroupV2 } from './whatTypeOfConversation';
+import {
+  getConversationIdForLogging,
+  getMessageIdForLogging,
+} from './idForLogging';
+import { missingCaseError } from './missingCaseError';
+import { getMessageSentTimestampSet } from './getMessageSentTimestampSet';
+import { getAuthor } from '../messages/helpers';
+import dataInterface, { deleteAndCleanup } from '../sql/Client';
+
+import type {
+  ConversationAttributesType,
+  MessageAttributesType,
+} from '../model-types';
+import type { ConversationModel } from '../models/conversations';
+import type {
+  ConversationToDelete,
+  MessageToDelete,
+} from '../textsecure/messageReceiverEvents';
+import type { AciString } from '../types/ServiceId';
+
+const {
+  getMessagesBySentAt,
+  getMostRecentAddressableMessages,
+  removeMessagesInConversation,
+} = dataInterface;
+
+export function doesMessageMatch({
+  conversationId,
+  message,
+  query,
+  sentTimestamps,
+}: {
+  message: MessageAttributesType;
+  conversationId: string;
+  query: MessageQuery;
+  sentTimestamps: ReadonlySet<number>;
+}): boolean {
+  const author = getAuthor(message);
+
+  const conversationMatches = message.conversationId === conversationId;
+  const aciMatches =
+    query.authorAci && author?.attributes.serviceId === query.authorAci;
+  const e164Matches =
+    query.authorE164 && author?.attributes.e164 === query.authorE164;
+  const timestampMatches = sentTimestamps.has(query.sentAt);
+
+  return Boolean(
+    conversationMatches && timestampMatches && (aciMatches || e164Matches)
+  );
+}
+
+export async function findMatchingMessage(
+  conversationId: string,
+  query: MessageQuery
+): Promise<MessageAttributesType | undefined> {
+  const sentAtMatches = await getMessagesBySentAt(query.sentAt);
+
+  if (!sentAtMatches.length) {
+    return undefined;
+  }
+
+  return sentAtMatches.find(message => {
+    const sentTimestamps = getMessageSentTimestampSet(message);
+    return doesMessageMatch({
+      conversationId,
+      message,
+      query,
+      sentTimestamps,
+    });
+  });
+}
+
+export async function deleteMessage(
+  conversationId: string,
+  targetMessage: MessageToDelete,
+  logId: string
+): Promise<boolean> {
+  const query = getMessageQueryFromTarget(targetMessage);
+  const found = await findMatchingMessage(conversationId, query);
+
+  if (!found) {
+    log.warn(`${logId}: Couldn't find matching message`);
+    return false;
+  }
+
+  await deleteAndCleanup([found], logId);
+
+  return true;
+}
+
+export async function deleteConversation(
+  conversation: ConversationModel,
+  mostRecentMessages: Array<MessageToDelete>,
+  isFullDelete: boolean,
+  logId: string
+): Promise<boolean> {
+  const queries = mostRecentMessages.map(getMessageQueryFromTarget);
+  const found = await Promise.all(
+    queries.map(query => findMatchingMessage(conversation.id, query))
+  );
+
+  const sorted = sortBy(found, 'received_at');
+  const newestMessage = last(sorted);
+  if (newestMessage) {
+    const { received_at: receivedAt } = newestMessage;
+
+    await removeMessagesInConversation(conversation.id, {
+      receivedAt,
+      logId: `${logId}(receivedAt=${receivedAt})`,
+    });
+  }
+
+  if (!newestMessage) {
+    log.warn(`${logId}: Found no target messages for delete`);
+  }
+
+  if (isFullDelete) {
+    log.info(`${logId}: isFullDelete=true, proceeding to local-only delete`);
+    return deleteLocalOnlyConversation(conversation, logId);
+  }
+
+  return true;
+}
+
+export async function deleteLocalOnlyConversation(
+  conversation: ConversationModel,
+  logId: string
+): Promise<boolean> {
+  const limit = 1;
+  const messages = await getMostRecentAddressableMessages(
+    conversation.id,
+    limit
+  );
+  if (messages.length > 0) {
+    log.warn(
+      `${logId}: Attempted local-only delete but found an addressable message`
+    );
+    return false;
+  }
+
+  // This will delete all messages and remove the conversation from the left pane.
+  // We need to call destroyMessagesInner, since we're already in conversation.queueJob()
+  await conversation.destroyMessagesInner({
+    logId,
+    source: 'local-delete-sync',
+  });
+
+  return true;
+}
+
+export function getConversationFromTarget(
+  targetConversation: ConversationToDelete
+): ConversationModel | undefined {
+  const { type } = targetConversation;
+
+  if (type === 'aci') {
+    return window.ConversationController.get(targetConversation.aci);
+  }
+  if (type === 'group') {
+    return window.ConversationController.get(targetConversation.groupId);
+  }
+  if (type === 'e164') {
+    return window.ConversationController.get(targetConversation.e164);
+  }
+
+  throw missingCaseError(type);
+}
+
+type MessageQuery = {
+  sentAt: number;
+  authorAci?: AciString;
+  authorE164?: string;
+};
+
+export function getMessageQueryFromTarget(
+  targetMessage: MessageToDelete
+): MessageQuery {
+  const { type, sentAt } = targetMessage;
+
+  if (type === 'aci') {
+    if (!isAciString(targetMessage.authorAci)) {
+      throw new Error('Provided authorAci was not an ACI!');
+    }
+    return { sentAt, authorAci: targetMessage.authorAci };
+  }
+  if (type === 'e164') {
+    return { sentAt, authorE164: targetMessage.authorE164 };
+  }
+
+  throw missingCaseError(type);
+}
+
+export function getConversationToDelete(
+  attributes: ConversationAttributesType
+): ConversationToDelete {
+  const { groupId, serviceId: aci, e164 } = attributes;
+  const idForLogging = getConversationIdForLogging(attributes);
+  const logId = `getConversationToDelete(${idForLogging})`;
+
+  if (isGroupV2(attributes) && groupId) {
+    return {
+      type: 'group',
+      groupId,
+    };
+  }
+  if (isGroup(attributes)) {
+    throw new Error(`${logId}: is a group, but not groupV2 or no groupId!`);
+  }
+  if (aci && isAciString(aci)) {
+    return {
+      type: 'aci',
+      aci,
+    };
+  }
+  if (e164) {
+    return {
+      type: 'e164',
+      e164,
+    };
+  }
+
+  throw new Error(`${logId}: No valid identifier found!`);
+}
+
+export function getMessageToDelete(
+  attributes: MessageAttributesType
+): MessageToDelete | undefined {
+  const logId = `getMessageToDelete(${getMessageIdForLogging(attributes)})`;
+  const { sent_at: sentAt } = attributes;
+
+  const author = getAuthor(attributes);
+  const authorAci = author?.get('serviceId');
+  const authorE164 = author?.get('e164');
+
+  if (authorAci && isAciString(authorAci)) {
+    return {
+      type: 'aci' as const,
+      authorAci,
+      sentAt,
+    };
+  }
+  if (authorE164) {
+    return {
+      type: 'e164' as const,
+      authorE164,
+      sentAt,
+    };
+  }
+
+  log.warn(`${logId}: Message was missing source ACI/e164`);
+
+  return undefined;
+}

ts/util/deleteForMe.types.ts

@@ -0,0 +1,4 @@
+// Copyright 2020 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+export const MAX_MESSAGE_COUNT = 500;

ts/util/handleMessageSend.ts

@@ -55,6 +55,7 @@ export const sendTypesEnum = z.enum([
   'pniIdentitySync',
 
   // Syncs, default non-urgent
+  'deleteForMeSync',
   'fetchLatestManifestSync',
   'fetchLocalProfileSync',
   'messageRequestSync',

ts/util/modifyTargetMessage.ts

@@ -9,6 +9,7 @@ import type { SendStateByConversationId } from '../messages/MessageSendState';
 import * as Edits from '../messageModifiers/Edits';
 import * as log from '../logging/log';
 import * as Deletes from '../messageModifiers/Deletes';
+import * as DeletesForMe from '../messageModifiers/DeletesForMe';
 import * as MessageReceipts from '../messageModifiers/MessageReceipts';
 import * as Reactions from '../messageModifiers/Reactions';
 import * as ReadSyncs from '../messageModifiers/ReadSyncs';
@@ -29,6 +30,12 @@ import { missingCaseError } from './missingCaseError';
 import { reduce } from './iterables';
 import { strictAssert } from './assert';
 
+export enum ModifyTargetMessageResult {
+  Modified = 'Modified',
+  NotModified = 'MotModified',
+  Deleted = 'Deleted',
+}
+
 // This function is called twice - once from handleDataMessage, and then again from
 //    saveAndNotify, a function called at the end of handleDataMessage as a cleanup for
 //    any missed out-of-order events.
@@ -36,7 +43,7 @@ export async function modifyTargetMessage(
   message: MessageModel,
   conversation: ConversationModel,
   options?: { isFirstRun: boolean; skipEdits: boolean }
-): Promise<void> {
+): Promise<ModifyTargetMessageResult> {
   const { isFirstRun = false, skipEdits = false } = options ?? {};
 
   const logId = `modifyTargetMessage/${message.idForLogging()}`;
@@ -45,6 +52,15 @@ export async function modifyTargetMessage(
   const ourAci = window.textsecure.storage.user.getCheckedAci();
   const sourceServiceId = getSourceServiceId(message.attributes);
 
+  const syncDeletes = await DeletesForMe.forMessage(message.attributes);
+  if (syncDeletes.length) {
+    if (!isFirstRun) {
+      await window.Signal.Data.removeMessage(message.id);
+    }
+
+    return ModifyTargetMessageResult.Deleted;
+  }
+
   if (type === 'outgoing' || (type === 'story' && ourAci === sourceServiceId)) {
     const sendActions = MessageReceipts.forMessage(message).map(receipt => {
       let sendActionType: SendActionType;
@@ -274,4 +290,8 @@ export async function modifyTargetMessage(
       )
     );
   }
+
+  return changed
+    ? ModifyTargetMessageResult.Modified
+    : ModifyTargetMessageResult.NotModified;
 }

ts/util/syncTasks.ts

@@ -0,0 +1,138 @@
+// Copyright 2020 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { z } from 'zod';
+import type { ZodSchema } from 'zod';
+
+import * as log from '../logging/log';
+import * as DeletesForMe from '../messageModifiers/DeletesForMe';
+import {
+  deleteMessageSchema,
+  deleteConversationSchema,
+  deleteLocalConversationSchema,
+} from '../textsecure/messageReceiverEvents';
+
+import {
+  deleteConversation,
+  deleteLocalOnlyConversation,
+  getConversationFromTarget,
+} from './deleteForMe';
+import { drop } from './drop';
+
+const syncTaskDataSchema = z.union([
+  deleteMessageSchema,
+  deleteConversationSchema,
+  deleteLocalConversationSchema,
+]);
+export type SyncTaskData = z.infer<typeof syncTaskDataSchema>;
+
+export type SyncTaskType = Readonly<{
+  id: string;
+  attempts: number;
+  createdAt: number;
+  data: unknown;
+  envelopeId: string;
+  sentAt: number;
+  type: SyncTaskData['type'];
+}>;
+
+const SCHEMAS_BY_TYPE: Record<SyncTaskData['type'], ZodSchema> = {
+  'delete-message': deleteMessageSchema,
+  'delete-conversation': deleteConversationSchema,
+  'delete-local-conversation': deleteLocalConversationSchema,
+};
+
+function toLogId(task: SyncTaskType) {
+  return `task=${task.id},timestamp:${task},type=${task.type},envelopeId=${task.envelopeId}`;
+}
+
+export async function queueSyncTasks(
+  tasks: Array<SyncTaskType>,
+  removeSyncTaskById: (id: string) => Promise<void>
+): Promise<void> {
+  const logId = 'queueSyncTasks';
+
+  for (let i = 0, max = tasks.length; i < max; i += 1) {
+    const task = tasks[i];
+    const { id, envelopeId, type, sentAt, data } = task;
+    const innerLogId = `${logId}(${toLogId(task)})`;
+
+    const schema = SCHEMAS_BY_TYPE[type];
+    if (!schema) {
+      log.error(`${innerLogId}: Schema not found. Deleting.`);
+      // eslint-disable-next-line no-await-in-loop
+      await removeSyncTaskById(id);
+      return;
+    }
+    const parseResult = syncTaskDataSchema.safeParse(data);
+    if (!parseResult.success) {
+      log.error(
+        `${innerLogId}: Failed to parse. Deleting. Error: ${parseResult.error}`
+      );
+      // eslint-disable-next-line no-await-in-loop
+      await removeSyncTaskById(id);
+      return;
+    }
+
+    const { data: parsed } = parseResult;
+
+    if (parsed.type === 'delete-message') {
+      // eslint-disable-next-line no-await-in-loop
+      await DeletesForMe.onDelete({
+        conversation: parsed.conversation,
+        envelopeId,
+        message: parsed.message,
+        syncTaskId: id,
+        timestamp: sentAt,
+      });
+    } else if (parsed.type === 'delete-conversation') {
+      const {
+        conversation: targetConversation,
+        mostRecentMessages,
+        isFullDelete,
+      } = parsed;
+      const conversation = getConversationFromTarget(targetConversation);
+      if (!conversation) {
+        log.error(`${innerLogId}: Conversation not found!`);
+        continue;
+      }
+      drop(
+        conversation.queueJob(innerLogId, async () => {
+          log.info(`${logId}: Starting...`);
+          const result = await deleteConversation(
+            conversation,
+            mostRecentMessages,
+            isFullDelete,
+            innerLogId
+          );
+          if (result) {
+            await removeSyncTaskById(id);
+          }
+          log.info(`${logId}: Done, result=${result}`);
+        })
+      );
+    } else if (parsed.type === 'delete-local-conversation') {
+      const { conversation: targetConversation } = parsed;
+      const conversation = getConversationFromTarget(targetConversation);
+      if (!conversation) {
+        log.error(`${innerLogId}: Conversation not found!`);
+        continue;
+      }
+      drop(
+        conversation.queueJob(innerLogId, async () => {
+          log.info(`${logId}: Starting...`);
+          const result = await deleteLocalOnlyConversation(
+            conversation,
+            innerLogId
+          );
+
+          // Note: we remove even with a 'false' result because we're only gonna
+          //   get more messages in this conversation from here!
+          await removeSyncTaskById(id);
+
+          log.info(`${logId}: Done; result=${result}`);
+        })
+      );
+    }
+  }
+}

ts/util/syncTasks.types.ts

@@ -0,0 +1,4 @@
+// Copyright 2020 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+export const MAX_SYNC_TASK_ATTEMPTS = 5;