Reload notifications when accepted notifications are merged (streaming only) (#31419)

app/controllers/api/v1/notifications/requests_controller.rb

@@ -1,8 +1,10 @@
 # frozen_string_literal: true
 
 class Api::V1::Notifications::RequestsController < Api::BaseController
-  before_action -> { doorkeeper_authorize! :read, :'read:notifications' }, only: :index
-  before_action -> { doorkeeper_authorize! :write, :'write:notifications' }, except: :index
+  include Redisable
+
+  before_action -> { doorkeeper_authorize! :read, :'read:notifications' }, only: [:index, :show, :merged?]
+  before_action -> { doorkeeper_authorize! :write, :'write:notifications' }, except: [:index, :show, :merged?]
 
   before_action :require_user!
   before_action :set_request, only: [:show, :accept, :dismiss]
@@ -19,6 +21,10 @@ class Api::V1::Notifications::RequestsController < Api::BaseController
     render json: @requests, each_serializer: REST::NotificationRequestSerializer, relationships: @relationships
   end
 
+  def merged?
+    render json: { merged: redis.get("notification_unfilter_jobs:#{current_account.id}").to_i <= 0 }
+  end
+
   def show
     render json: @request, serializer: REST::NotificationRequestSerializer
   end

app/javascript/mastodon/actions/notification_groups.ts

@@ -138,8 +138,18 @@ export const processNewNotificationForGroups = createAppAsyncThunk(
 
 export const loadPending = createAction('notificationGroups/loadPending');
 
-export const updateScrollPosition = createAction<{ top: boolean }>(
+export const updateScrollPosition = createAppAsyncThunk(
   'notificationGroups/updateScrollPosition',
+  ({ top }: { top: boolean }, { dispatch, getState }) => {
+    if (
+      top &&
+      getState().notificationGroups.mergedNotifications === 'needs-reload'
+    ) {
+      void dispatch(fetchNotifications());
+    }
+
+    return { top };
+  },
 );
 
 export const setNotificationsFilter = createAppAsyncThunk(
@@ -165,5 +175,34 @@ export const markNotificationsAsRead = createAction(
   'notificationGroups/markAsRead',
 );
 
-export const mountNotifications = createAction('notificationGroups/mount');
+export const mountNotifications = createAppAsyncThunk(
+  'notificationGroups/mount',
+  (_, { dispatch, getState }) => {
+    const state = getState();
+
+    if (
+      state.notificationGroups.mounted === 0 &&
+      state.notificationGroups.mergedNotifications === 'needs-reload'
+    ) {
+      void dispatch(fetchNotifications());
+    }
+  },
+);
+
 export const unmountNotifications = createAction('notificationGroups/unmount');
+
+export const refreshStaleNotificationGroups = createAppAsyncThunk<{
+  deferredRefresh: boolean;
+}>('notificationGroups/refreshStale', (_, { dispatch, getState }) => {
+  const state = getState();
+
+  if (
+    state.notificationGroups.scrolledToTop ||
+    !state.notificationGroups.mounted
+  ) {
+    void dispatch(fetchNotifications());
+    return { deferredRefresh: false };
+  }
+
+  return { deferredRefresh: true };
+});

app/javascript/mastodon/actions/streaming.js

@@ -10,7 +10,7 @@ import {
   deleteAnnouncement,
 } from './announcements';
 import { updateConversations } from './conversations';
-import { processNewNotificationForGroups } from './notification_groups';
+import { processNewNotificationForGroups, refreshStaleNotificationGroups } from './notification_groups';
 import { updateNotifications, expandNotifications } from './notifications';
 import { updateStatus } from './statuses';
 import {
@@ -108,6 +108,14 @@ export const connectTimelineStream = (timelineId, channelName, params = {}, opti
           }
           break;
         }
+        case 'notifications_merged':
+          const state = getState();
+          if (state.notifications.top || !state.notifications.mounted)
+            dispatch(expandNotifications({ forceLoad: true, maxId: undefined }));
+          if(state.settings.getIn(['notifications', 'groupingBeta'], false)) {
+            dispatch(refreshStaleNotificationGroups());
+          }
+          break;
         case 'conversation':
           // @ts-expect-error
           dispatch(updateConversations(JSON.parse(data.payload)));

app/javascript/mastodon/features/notifications_v2/index.tsx

@@ -81,7 +81,11 @@ export const Notifications: React.FC<{
 
   const anyPendingNotification = useAppSelector(selectAnyPendingNotification);
 
-  const isUnread = unreadNotificationsCount > 0;
+  const needsReload = useAppSelector(
+    (state) => state.notificationGroups.mergedNotifications === 'needs-reload',
+  );
+
+  const isUnread = unreadNotificationsCount > 0 || needsReload;
 
   const canMarkAsRead =
     useAppSelector(selectSettingsNotificationsShowUnread) &&
@@ -118,11 +122,11 @@ export const Notifications: React.FC<{
 
   // Keep track of mounted components for unread notification handling
   useEffect(() => {
-    dispatch(mountNotifications());
+    void dispatch(mountNotifications());
 
     return () => {
       dispatch(unmountNotifications());
-      dispatch(updateScrollPosition({ top: false }));
+      void dispatch(updateScrollPosition({ top: false }));
     };
   }, [dispatch]);
 
@@ -147,11 +151,11 @@ export const Notifications: React.FC<{
   }, [dispatch]);
 
   const handleScrollToTop = useDebouncedCallback(() => {
-    dispatch(updateScrollPosition({ top: true }));
+    void dispatch(updateScrollPosition({ top: true }));
   }, 100);
 
   const handleScroll = useDebouncedCallback(() => {
-    dispatch(updateScrollPosition({ top: false }));
+    void dispatch(updateScrollPosition({ top: false }));
   }, 100);
 
   useEffect(() => {

app/javascript/mastodon/reducers/notification_groups.ts

@@ -19,6 +19,7 @@ import {
   markNotificationsAsRead,
   mountNotifications,
   unmountNotifications,
+  refreshStaleNotificationGroups,
 } from 'mastodon/actions/notification_groups';
 import {
   disconnectTimeline,
@@ -51,6 +52,7 @@ interface NotificationGroupsState {
   readMarkerId: string;
   mounted: number;
   isTabVisible: boolean;
+  mergedNotifications: 'ok' | 'pending' | 'needs-reload';
 }
 
 const initialState: NotificationGroupsState = {
@@ -58,6 +60,8 @@ const initialState: NotificationGroupsState = {
   pendingGroups: [], // holds pending groups in slow mode
   scrolledToTop: false,
   isLoading: false,
+  // this is used to track whether we need to refresh notifications after accepting requests
+  mergedNotifications: 'ok',
   // The following properties are used to track unread notifications
   lastReadId: '0', // used internally for unread notifications
   readMarkerId: '0', // user-facing and updated when focus changes
@@ -301,6 +305,7 @@ export const notificationGroupsReducer = createReducer<NotificationGroupsState>(
           json.type === 'gap' ? json : createNotificationGroupFromJSON(json),
         );
         state.isLoading = false;
+        state.mergedNotifications = 'ok';
         updateLastReadId(state);
       })
       .addCase(fetchNotificationsGap.fulfilled, (state, action) => {
@@ -455,7 +460,7 @@ export const notificationGroupsReducer = createReducer<NotificationGroupsState>(
         state.groups = state.pendingGroups.concat(state.groups);
         state.pendingGroups = [];
       })
-      .addCase(updateScrollPosition, (state, action) => {
+      .addCase(updateScrollPosition.fulfilled, (state, action) => {
         state.scrolledToTop = action.payload.top;
         updateLastReadId(state);
         trimNotifications(state);
@@ -482,7 +487,7 @@ export const notificationGroupsReducer = createReducer<NotificationGroupsState>(
             action.payload.markers.notifications.last_read_id;
         }
       })
-      .addCase(mountNotifications, (state) => {
+      .addCase(mountNotifications.fulfilled, (state) => {
         state.mounted += 1;
         commitLastReadId(state);
         updateLastReadId(state);
@@ -498,6 +503,10 @@ export const notificationGroupsReducer = createReducer<NotificationGroupsState>(
       .addCase(unfocusApp, (state) => {
         state.isTabVisible = false;
       })
+      .addCase(refreshStaleNotificationGroups.fulfilled, (state, action) => {
+        if (action.payload.deferredRefresh)
+          state.mergedNotifications = 'needs-reload';
+      })
       .addMatcher(
         isAnyOf(authorizeFollowRequestSuccess, rejectFollowRequestSuccess),
         (state, action) => {

app/services/accept_notification_request_service.rb

@@ -1,9 +1,21 @@
 # frozen_string_literal: true
 
 class AcceptNotificationRequestService < BaseService
+  include Redisable
+
   def call(request)
     NotificationPermission.create!(account: request.account, from_account: request.from_account)
+    increment_worker_count!(request)
     UnfilterNotificationsWorker.perform_async(request.account_id, request.from_account_id)
     request.destroy!
   end
+
+  private
+
+  def increment_worker_count!(request)
+    with_redis do |redis|
+      redis.incr("notification_unfilter_jobs:#{request.account_id}")
+      redis.expire("notification_unfilter_jobs:#{request.account_id}", 30.minutes.to_i)
+    end
+  end
 end

app/workers/unfilter_notifications_worker.rb

@@ -2,6 +2,7 @@
 
 class UnfilterNotificationsWorker
   include Sidekiq::Worker
+  include Redisable
 
   # Earlier versions of the feature passed a `notification_request` ID
   # If `to_account_id` is passed, the first argument is an account ID
@@ -9,19 +10,20 @@ class UnfilterNotificationsWorker
   def perform(notification_request_or_account_id, from_account_id = nil)
     if from_account_id.present?
       @notification_request = nil
-      @from_account = Account.find(from_account_id)
-      @recipient    = Account.find(notification_request_or_account_id)
+      @from_account = Account.find_by(id: from_account_id)
+      @recipient    = Account.find_by(id: notification_request_or_account_id)
     else
-      @notification_request = NotificationRequest.find(notification_request_or_account_id)
-      @from_account = @notification_request.from_account
-      @recipient    = @notification_request.account
+      @notification_request = NotificationRequest.find_by(id: notification_request_or_account_id)
+      @from_account = @notification_request&.from_account
+      @recipient    = @notification_request&.account
     end
 
+    return if @from_account.nil? || @recipient.nil?
+
     push_to_conversations!
     unfilter_notifications!
     remove_request!
-  rescue ActiveRecord::RecordNotFound
-    true
+    decrement_worker_count!
   end
 
   private
@@ -45,4 +47,17 @@ class UnfilterNotificationsWorker
   def notifications_with_private_mentions
     filtered_notifications.where(type: :mention).joins(mention: :status).merge(Status.where(visibility: :direct)).includes(mention: :status)
   end
+
+  def decrement_worker_count!
+    value = redis.decr("notification_unfilter_jobs:#{@recipient.id}")
+    push_streaming_event! if value <= 0 && subscribed_to_streaming_api?
+  end
+
+  def push_streaming_event!
+    redis.publish("timeline:#{@recipient.id}:notifications", Oj.dump(event: :notifications_merged, payload: '1'))
+  end
+
+  def subscribed_to_streaming_api?
+    redis.exists?("subscribed:timeline:#{@recipient.id}") || redis.exists?("subscribed:timeline:#{@recipient.id}:notifications")
+  end
 end

config/routes/api.rb

@@ -158,6 +158,7 @@ namespace :api, format: false do
         collection do
           post :accept, to: 'requests#accept_bulk'
           post :dismiss, to: 'requests#dismiss_bulk'
+          get :merged, to: 'requests#merged?'
         end
 
         member do

spec/requests/api/v1/notifications/requests_spec.rb

@@ -120,4 +120,34 @@ RSpec.describe 'Requests' do
       expect(response).to have_http_status(200)
     end
   end
+
+  describe 'GET /api/v1/notifications/requests/merged' do
+    subject do
+      get '/api/v1/notifications/requests/merged', headers: headers
+    end
+
+    it_behaves_like 'forbidden for wrong scope', 'write write:notifications'
+
+    context 'when the user has no accepted request pending merge' do
+      it 'returns http success and returns merged: true' do
+        subject
+
+        expect(response).to have_http_status(200)
+        expect(body_as_json).to eq({ merged: true })
+      end
+    end
+
+    context 'when the user has an accepted request pending merge' do
+      before do
+        redis.set("notification_unfilter_jobs:#{user.account_id}", 1)
+      end
+
+      it 'returns http success and returns merged: false' do
+        subject
+
+        expect(response).to have_http_status(200)
+        expect(body_as_json).to eq({ merged: false })
+      end
+    end
+  end
 end

spec/services/accept_notification_request_service_spec.rb

@@ -8,10 +8,11 @@ RSpec.describe AcceptNotificationRequestService do
   let(:notification_request) { Fabricate(:notification_request) }
 
   describe '#call' do
-    it 'destroys the notification request, creates a permission, and queues a worker' do
+    it 'destroys the notification request, creates a permission, increases the jobs count and queues a worker' do
       expect { subject.call(notification_request) }
         .to change { NotificationRequest.exists?(notification_request.id) }.to(false)
         .and change { NotificationPermission.exists?(account_id: notification_request.account_id, from_account_id: notification_request.from_account_id) }.to(true)
+        .and change { redis.get("notification_unfilter_jobs:#{notification_request.account_id}").to_i }.by(1)
 
       expect(UnfilterNotificationsWorker).to have_enqueued_sidekiq_job(notification_request.account_id, notification_request.from_account_id)
     end

spec/workers/unfilter_notifications_worker_spec.rb

@@ -13,13 +13,56 @@ describe UnfilterNotificationsWorker do
     Fabricate(:notification, filtered: true, from_account: sender, account: recipient, type: :mention, activity: mention)
     follow_request = sender.request_follow!(recipient)
     Fabricate(:notification, filtered: true, from_account: sender, account: recipient, type: :follow_request, activity: follow_request)
+    allow(redis).to receive(:publish)
+    allow(redis).to receive(:exists?).and_return(false)
   end
 
   shared_examples 'shared behavior' do
-    it 'unfilters notifications and adds private messages to conversations' do
-      expect { subject }
-        .to change { recipient.notifications.where(from_account_id: sender.id).pluck(:filtered) }.from([true, true]).to([false, false])
-        .and change { recipient.conversations.exists?(last_status_id: sender.statuses.first.id) }.to(true)
+    context 'when this is the last pending merge job and the user is subscribed to streaming' do
+      before do
+        redis.set("notification_unfilter_jobs:#{recipient.id}", 1)
+        allow(redis).to receive(:exists?).with("subscribed:timeline:#{recipient.id}").and_return(true)
+      end
+
+      it 'unfilters notifications, adds private messages to conversations, and pushes to redis' do
+        expect { subject }
+          .to change { recipient.notifications.where(from_account_id: sender.id).pluck(:filtered) }.from([true, true]).to([false, false])
+          .and change { recipient.conversations.exists?(last_status_id: sender.statuses.first.id) }.to(true)
+          .and change { redis.get("notification_unfilter_jobs:#{recipient.id}").to_i }.by(-1)
+
+        expect(redis).to have_received(:publish).with("timeline:#{recipient.id}:notifications", '{"event":"notifications_merged","payload":"1"}')
+      end
+    end
+
+    context 'when this is not last pending merge job and the user is subscribed to streaming' do
+      before do
+        redis.set("notification_unfilter_jobs:#{recipient.id}", 2)
+        allow(redis).to receive(:exists?).with("subscribed:timeline:#{recipient.id}").and_return(true)
+      end
+
+      it 'unfilters notifications, adds private messages to conversations, and does not push to redis' do
+        expect { subject }
+          .to change { recipient.notifications.where(from_account_id: sender.id).pluck(:filtered) }.from([true, true]).to([false, false])
+          .and change { recipient.conversations.exists?(last_status_id: sender.statuses.first.id) }.to(true)
+          .and change { redis.get("notification_unfilter_jobs:#{recipient.id}").to_i }.by(-1)
+
+        expect(redis).to_not have_received(:publish).with("timeline:#{recipient.id}:notifications", '{"event":"notifications_merged","payload":"1"}')
+      end
+    end
+
+    context 'when this is the last pending merge job and the user is not subscribed to streaming' do
+      before do
+        redis.set("notification_unfilter_jobs:#{recipient.id}", 1)
+      end
+
+      it 'unfilters notifications, adds private messages to conversations, and does not push to redis' do
+        expect { subject }
+          .to change { recipient.notifications.where(from_account_id: sender.id).pluck(:filtered) }.from([true, true]).to([false, false])
+          .and change { recipient.conversations.exists?(last_status_id: sender.statuses.first.id) }.to(true)
+          .and change { redis.get("notification_unfilter_jobs:#{recipient.id}").to_i }.by(-1)
+
+        expect(redis).to_not have_received(:publish).with("timeline:#{recipient.id}:notifications", '{"event":"notifications_merged","payload":"1"}')
+      end
     end
   end