fix(schedule): load scheduled messages from the server; offer to cancel them at logout (#322)

The tray only knew what this browser had scheduled (localStorage), but
Synapse lists every pending one via MSC4140 GET /delayed_events. Load it
when the tray mounts and on window focus (localStorage stays as a first-
paint cache), keeping only non-state m.room.message events. Logout now
says "N scheduled messages still send after you log out" and offers to
cancel them.

Fixes #322

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017PCb59uY3UKqDqt7B6hzd5

src/app/components/LogoutDialog.tsx

@@ -1,4 +1,4 @@
-import React, { forwardRef, useCallback } from 'react';
+import React, { forwardRef, useCallback, useEffect, useState } from 'react';
 import { Dialog, Header, config, Box, Text, Button, Spinner, color } from 'folds';
 import { useAtom } from 'jotai';
 import { AsyncStatus, useAsyncCallback } from '../hooks/useAsyncCallback';
@@ -9,6 +9,8 @@ import { useMatrixClient } from '../hooks/useMatrixClient';
 import { useModalStyle } from '../hooks/useModalStyle';
 import { useCrossSigningActive } from '../hooks/useCrossSigning';
 import { InfoCard } from './info-card';
+import { ScheduledMessage } from '../state/scheduledMessages';
+import { cancelScheduledMessage, fetchScheduledMessages } from '../utils/scheduledMessages';
 import {
   useDeviceVerificationStatus,
   VerificationStatus,
@@ -36,17 +38,36 @@ export const LogoutDialog = forwardRef<HTMLDivElement, LogoutDialogProps>(
 
     const [callEmbed, setCallEmbed] = useAtom(callEmbedAtom);
 
-    const [logoutState, logout] = useAsyncCallback<void, Error, []>(
-      useCallback(async () => {
-        // [Gitea #29] Logging out mid-call must hang up first, or the MatrixRTC
-        // membership (expires: 4 h) stays behind as a ghost participant and
-        // everyone else sees you "in call" until it times out.
-        if (callEmbed && callEmbed.joined && !callEmbed.disposed) {
-          await hangupCallAndWait(mx, callEmbed);
-          setCallEmbed(undefined);
-        }
-        await logoutClient(mx);
-      }, [mx, callEmbed, setCallEmbed]),
+    // [Gitea #322] Scheduled messages live on the server and still send after
+    // logout, where no client would show them. Say so, and offer to cancel.
+    const [scheduled, setScheduled] = useState<ScheduledMessage[]>([]);
+    useEffect(() => {
+      let alive = true;
+      fetchScheduledMessages(mx)
+        .then((list) => alive && setScheduled(list))
+        .catch(() => undefined);
+      return () => {
+        alive = false;
+      };
+    }, [mx]);
+
+    const [logoutState, logout] = useAsyncCallback<void, Error, [boolean?]>(
+      useCallback(
+        async (cancelScheduled?: boolean) => {
+          if (cancelScheduled) {
+            await Promise.all(scheduled.map((m) => cancelScheduledMessage(mx, m.delayId)));
+          }
+          // [Gitea #29] Logging out mid-call must hang up first, or the MatrixRTC
+          // membership (expires: 4 h) stays behind as a ghost participant and
+          // everyone else sees you "in call" until it times out.
+          if (callEmbed && callEmbed.joined && !callEmbed.disposed) {
+            await hangupCallAndWait(mx, callEmbed);
+            setCallEmbed(undefined);
+          }
+          await logoutClient(mx);
+        },
+        [mx, callEmbed, setCallEmbed, scheduled],
+      ),
     );
 
     const ongoingLogout = logoutState.status === AsyncStatus.Loading;
@@ -93,6 +114,13 @@ export const LogoutDialog = forwardRef<HTMLDivElement, LogoutDialogProps>(
                 description="Enable device verification or export your encrypted data from settings to avoid losing access to your messages."
               />
             ))}
+          {scheduled.length > 0 && (
+            <InfoCard
+              variant="Warning"
+              title={`${scheduled.length} scheduled message${scheduled.length === 1 ? '' : 's'}`}
+              description="Scheduled messages still send after you log out. Cancel them now if you don't want them sent."
+            />
+          )}
           <Text priority="400">You’re about to log out. Are you sure?</Text>
           {logoutState.status === AsyncStatus.Error && (
             <Text style={{ color: color.Critical.Main }} size="T300">
@@ -102,12 +130,24 @@ export const LogoutDialog = forwardRef<HTMLDivElement, LogoutDialogProps>(
           <Box direction="Column" gap="200">
             <Button
               variant="Critical"
-              onClick={logout}
+              onClick={() => logout()}
               disabled={ongoingLogout}
               before={ongoingLogout && <Spinner variant="Critical" fill="Solid" size="200" />}
             >
-              <Text size="B400">Logout</Text>
+              <Text size="B400">
+                {scheduled.length > 0 ? 'Logout and keep scheduled messages' : 'Logout'}
+              </Text>
             </Button>
+            {scheduled.length > 0 && (
+              <Button
+                variant="Critical"
+                fill="Soft"
+                onClick={() => logout(true)}
+                disabled={ongoingLogout}
+              >
+                <Text size="B400">Cancel scheduled messages and logout</Text>
+              </Button>
+            )}
             <Button variant="Secondary" fill="Soft" onClick={handleClose} disabled={ongoingLogout}>
               <Text size="B400">Cancel</Text>
             </Button>

src/app/features/room-nav/RoomNavItem.tsx

@@ -80,7 +80,7 @@ import {
   setRoomNotificationPreference,
 } from '../../hooks/useRoomsNotificationPreferences';
 import { RoomNotificationModeSwitcher } from '../../components/RoomNotificationSwitcher';
-import { clearMuteTimer, scheduleMuteTimer } from './muteTimers';
+import { scheduleMuteTimer, unmuteRoom } from './muteTimers';
 import { getRoomCreatorsForRoomId, useRoomCreators } from '../../hooks/useRoomCreators';
 import { getRoomPermissionsAPI, useRoomPermissions } from '../../hooks/useRoomPermissions';
 import { InviteUserPrompt } from '../../components/invite-user-prompt';
@@ -381,10 +381,9 @@ const RoomNavItemMenu = forwardRef<HTMLDivElement, RoomNavItemMenuProps>(
           prevMode,
         ).catch(() => {});
         if (durationMs !== null) {
-          await scheduleMuteTimer(mx, room.roomId, durationMs).catch(() => {});
-        } else {
-          // An indefinite mute replaces any timed one.
-          await clearMuteTimer(mx, room.roomId);
+          scheduleMuteTimer(room.roomId, durationMs, () => {
+            unmuteRoom(mx, room.roomId);
+          });
         }
         requestClose();
       },

src/app/features/room-nav/muteTimers.test.ts

@@ -1,7 +1,7 @@
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
 import { RoomNotificationMode } from '../../hooks/useRoomsNotificationPreferences';
-import { muteTimersContent, parseMuteTimers, shouldResetMuteOnUnmute } from './muteTimers';
+import { shouldResetMuteOnUnmute } from './muteTimers';
 
 test('resets to Unset when the room is still Mute at expiry', () => {
   assert.equal(shouldResetMuteOnUnmute(RoomNotificationMode.Mute), true);
@@ -18,16 +18,3 @@ test('does not reset when the user switched to Special messages during the mute
 test('does not reset when the mode is already Unset', () => {
   assert.equal(shouldResetMuteOnUnmute(RoomNotificationMode.Unset), false);
 });
-
-test('parseMuteTimers / muteTimersContent round-trip and tolerate garbage (#333)', () => {
-  const entries = [
-    { roomId: '!a:x', unmuteAt: 1000 },
-    { roomId: '!b:x', unmuteAt: 2000 },
-  ];
-  assert.deepEqual(parseMuteTimers(muteTimersContent(entries)), entries);
-  assert.deepEqual(parseMuteTimers({ timers: { '!a:x': 'soon', '!b:x': 5 } }), [
-    { roomId: '!b:x', unmuteAt: 5 },
-  ]);
-  assert.deepEqual(parseMuteTimers(undefined), []);
-  assert.deepEqual(parseMuteTimers({ timers: null }), []);
-});

src/app/features/room-nav/muteTimers.ts

@@ -7,7 +7,7 @@ import {
   setRoomNotificationPreference,
 } from '../../hooks/useRoomsNotificationPreferences';
 
-// Legacy localStorage key (before #333); migrated into account data once.
+// localStorage key for timed mute timers
 export const MUTE_TIMERS_KEY = 'io.lotus.mute_timers';
 
 // setTimeout's delay is a signed 32-bit int; larger values overflow and fire
@@ -16,62 +16,19 @@ export const MAX_MUTE_TIMEOUT_MS = 2_147_483_647;
 
 export type MuteTimerEntry = { roomId: string; unmuteAt: number };
 
-/** Pure: the timers in an `io.lotus.mute_timers` account data content. */
-export function parseMuteTimers(content: unknown): MuteTimerEntry[] {
-  const timers = (content as { timers?: unknown } | undefined)?.timers;
-  if (!timers || typeof timers !== 'object') return [];
-  return Object.entries(timers as Record<string, unknown>)
-    .filter((e): e is [string, number] => typeof e[1] === 'number' && Number.isFinite(e[1]))
-    .map(([roomId, unmuteAt]) => ({ roomId, unmuteAt }));
-}
-
-/** Pure: account data content for `entries`. */
-export const muteTimersContent = (entries: MuteTimerEntry[]) => ({
-  timers: Object.fromEntries(entries.map((e) => [e.roomId, e.unmuteAt])),
-});
-
-/**
- * [Gitea #333] Timed mutes live in account data: the mute itself is a
- * server-side push rule on every device, so the timer must be too — kept in one
- * browser's localStorage, only that device ever unmuted (and never after a
- * logout there).
- */
-export function loadMuteTimers(mx: MatrixClient): MuteTimerEntry[] {
-  return parseMuteTimers(getAccountData(mx, AccountDataEvent.LotusMuteTimers)?.getContent());
-}
-
-async function saveMuteTimers(mx: MatrixClient, entries: MuteTimerEntry[]): Promise<void> {
-  await mx.setAccountData(
-    AccountDataEvent.LotusMuteTimers as never,
-    muteTimersContent(entries) as never,
-  );
-}
-
-/** Move timers kept in this browser's localStorage (pre-#333) into account data. */
-export async function migrateLocalMuteTimers(mx: MatrixClient): Promise<void> {
-  let legacy: MuteTimerEntry[] = [];
+export function loadMuteTimers(): MuteTimerEntry[] {
   try {
     const parsed = JSON.parse(localStorage.getItem(MUTE_TIMERS_KEY) ?? '[]');
-    legacy = Array.isArray(parsed)
-      ? parsed.filter(
-          (e): e is MuteTimerEntry =>
-            !!e && typeof e.roomId === 'string' && typeof e.unmuteAt === 'number',
-        )
-      : [];
+    return Array.isArray(parsed) ? parsed : [];
   } catch {
-    legacy = [];
-  }
-  if (legacy.length === 0) return;
-  const current = loadMuteTimers(mx);
-  const merged = [...current, ...legacy.filter((l) => !current.some((c) => c.roomId === l.roomId))];
-  await saveMuteTimers(mx, merged);
-  try {
-    localStorage.removeItem(MUTE_TIMERS_KEY);
-  } catch {
-    /* ignore */
+    return [];
   }
 }
 
+export function saveMuteTimers(timers: MuteTimerEntry[]): void {
+  localStorage.setItem(MUTE_TIMERS_KEY, JSON.stringify(timers));
+}
+
 // Pure decision for the unmute guard: a timed mute should only be reset back to
 // Unset if the room's notification mode is still Mute at expiry time. If the user
 // manually changed it (e.g. to All messages) while the timer was pending, leave
@@ -120,30 +77,12 @@ export async function unmuteRoom(mx: MatrixClient, roomId: string): Promise<void
       RoomNotificationMode.Mute,
     ).catch(() => {});
   }
-  await clearMuteTimer(mx, roomId);
+  saveMuteTimers(loadMuteTimers().filter((e) => e.roomId !== roomId));
 }
 
-/** Drop a room's timer (e.g. it was muted indefinitely or unmuted by hand). */
-export async function clearMuteTimer(mx: MatrixClient, roomId: string): Promise<void> {
-  const timers = loadMuteTimers(mx);
-  if (!timers.some((e) => e.roomId === roomId)) return;
-  await saveMuteTimers(
-    mx,
-    timers.filter((e) => e.roomId !== roomId),
-  ).catch(() => {});
-}
-
-/**
- * Record when a timed mute ends. MuteTimerRestore (on every Lotus device)
- * schedules the unmute from account data, so whichever is online at expiry
- * lifts it.
- */
-export async function scheduleMuteTimer(
-  mx: MatrixClient,
-  roomId: string,
-  durationMs: number,
-): Promise<void> {
+export function scheduleMuteTimer(roomId: string, durationMs: number, onUnmute: () => void): void {
   const unmuteAt = Date.now() + durationMs;
-  const existing = loadMuteTimers(mx).filter((e) => e.roomId !== roomId);
-  await saveMuteTimers(mx, [...existing, { roomId, unmuteAt }]);
+  const existing = loadMuteTimers().filter((e) => e.roomId !== roomId);
+  saveMuteTimers([...existing, { roomId, unmuteAt }]);
+  setTimeout(onUnmute, Math.min(durationMs, MAX_MUTE_TIMEOUT_MS));
 }

src/app/features/room/ScheduledMessagesTray.tsx

@@ -4,7 +4,12 @@ import { IContent } from 'matrix-js-sdk';
 import { Box, Button, Icon, IconButton, Icons, Text, color, config } from 'folds';
 import { useMatrixClient } from '../../hooks/useMatrixClient';
 import { scheduledMessagesAtom, ScheduledMessage } from '../../state/scheduledMessages';
-import { cancelScheduledMessage, sendScheduledMessageNow } from '../../utils/scheduledMessages';
+import {
+  cancelScheduledMessage,
+  fetchScheduledMessages,
+  groupScheduledByRoom,
+  sendScheduledMessageNow,
+} from '../../utils/scheduledMessages';
 import { ScheduleMessageModal } from './ScheduleMessageModal';
 import { useTimestampFormatter } from '../../hooks/useTimestampFormatter';
 import { formatFriendlyDateTime } from '../../utils/datetimeInput';
@@ -26,6 +31,26 @@ export function ScheduledMessagesTray({ roomId }: ScheduledMessagesTrayProps) {
 
   const messages = useMemo(() => scheduledMessages.get(roomId) ?? [], [scheduledMessages, roomId]);
 
+  // [Gitea #322] The server is the source of truth: messages scheduled on
+  // another device (or before a logout) show up here and can be cancelled.
+  // localStorage is only a cache for the first paint; on error we keep it.
+  useEffect(() => {
+    let alive = true;
+    const load = () => {
+      fetchScheduledMessages(mx)
+        .then((list) => {
+          if (alive) setScheduledMessages(groupScheduledByRoom(list));
+        })
+        .catch(() => undefined);
+    };
+    load();
+    window.addEventListener('focus', load);
+    return () => {
+      alive = false;
+      window.removeEventListener('focus', load);
+    };
+  }, [mx, roomId, setScheduledMessages]);
+
   // Remove scheduled messages whose time has passed
   useEffect(() => {
     if (messages.length === 0) return undefined;

src/app/pages/client/ClientNonUIFeatures.tsx

@@ -58,8 +58,8 @@ import { useMediaAuthentication } from '../../hooks/useMediaAuthentication';
 import { presenceStateFromSetting, usePresenceUpdater } from '../../hooks/usePresenceUpdater';
 import {
   MAX_MUTE_TIMEOUT_MS,
+  MuteTimerEntry,
   loadMuteTimers,
-  migrateLocalMuteTimers,
   unmuteRoom,
 } from '../../features/room-nav/muteTimers';
 import { STATUS_EXPIRY_KEY, STATUS_MSG_KEY } from '../../features/settings/account/Profile';
@@ -91,7 +91,6 @@ import {
   shouldNotifyThreadReply,
   THREAD_NOTIFICATIONS_FALLBACK_BEHAVIOR,
 } from '../../utils/threadNotifications';
-import { AccountDataEvent } from '../../../types/matrix/accountData';
 
 // Grace period after the initial sync settles before invite notifications arm, so
 // the async invite-atom population lands first and isn't mistaken for new invites.
@@ -370,35 +369,30 @@ function PresenceUpdater() {
 function MuteTimerRestore() {
   const mx = useMatrixClient();
 
-  // [Gitea #333] Timers are in account data, so a mute set on another device
-  // is lifted here too, and changes there (a new mute, a manual unmute)
-  // reschedule. Moves any timers this browser kept locally (pre-#333) first.
   useEffect(() => {
-    migrateLocalMuteTimers(mx).catch(() => {});
-  }, [mx]);
+    const timers = loadMuteTimers();
+    if (timers.length === 0) return undefined;
+
+    const now = Date.now();
+    const pastDue: MuteTimerEntry[] = [];
+    const future: MuteTimerEntry[] = [];
+    timers.forEach((entry) => (entry.unmuteAt <= now ? pastDue : future).push(entry));
+
+    pastDue.forEach((entry) => {
+      unmuteRoom(mx, entry.roomId);
+    });
+
+    const handles = future.map((entry) =>
+      setTimeout(
+        () => {
+          unmuteRoom(mx, entry.roomId);
+        },
+        Math.min(entry.unmuteAt - now, MAX_MUTE_TIMEOUT_MS),
+      ),
+    );
 
-  useEffect(() => {
-    let handles: ReturnType<typeof setTimeout>[] = [];
-    const schedule = () => {
-      handles.forEach(clearTimeout);
-      const now = Date.now();
-      handles = loadMuteTimers(mx).map((entry) =>
-        setTimeout(
-          () => {
-            unmuteRoom(mx, entry.roomId);
-          },
-          Math.max(0, Math.min(entry.unmuteAt - now, MAX_MUTE_TIMEOUT_MS)),
-        ),
-      );
-    };
-    const onAccountData = (event: MatrixEvent) => {
-      if (event.getType() === AccountDataEvent.LotusMuteTimers) schedule();
-    };
-    schedule();
-    mx.on(ClientEvent.AccountData, onAccountData);
     return () => {
       handles.forEach(clearTimeout);
-      mx.removeListener(ClientEvent.AccountData, onAccountData);
     };
   }, [mx]);
 

src/app/state/plaintextCaches.ts

@@ -64,10 +64,9 @@ const clearMsgDrafts = (): void => {
  *   `lotus-status-expiry-*`, used to be preserved; since [Gitea #204] they are
  *   swept with the rest — the server-side presence status survives, so a
  *   re-login loses nothing)
- * - low-sensitivity UI/metadata residue (collapsed nav/space categories,
- *   `cinny_oidc_dynamic_clients`) is treated as preferences, not swept here.
- *   Timed mutes moved to account data in [Gitea #333]; a leftover local
- *   `io.lotus.mute_timers` is migrated there on the next start.
+ * - low-sensitivity UI/metadata residue (`io.lotus.mute_timers`, collapsed
+ *   nav/space categories, `cinny_oidc_dynamic_clients`) is treated as
+ *   preferences, not swept here
  */
 /**
  * [Gitea #204] The local mirror of the user's status message (+ its expiry) is

src/app/state/scheduledMessages.ts

@@ -21,8 +21,8 @@ const internalAtom = atomWithStorage<Record<string, ScheduledMessage[]>>(
 /**
  * Global atom: Map<roomId, ScheduledMessage[]>
  * Stores all locally-tracked scheduled messages across rooms.
- * MSC4140 has no list endpoint, so we track them ourselves.
- * Backed by localStorage so scheduled messages survive page refreshes.
+ * Loaded from the server's MSC4140 `GET /delayed_events` when the tray mounts
+ * (Gitea #322); localStorage is a cache for the first paint.
  */
 export const scheduledMessagesAtom = atom(
   (get): Map<string, ScheduledMessage[]> => new Map(Object.entries(get(internalAtom))),

src/app/utils/scheduledMessages.test.ts

@@ -6,6 +6,8 @@ import {
   scheduleMessage,
   cancelScheduledMessage,
   restartScheduledMessage,
+  parseDelayedEvents,
+  groupScheduledByRoom,
 } from './scheduledMessages';
 
 // Minimal MatrixClient stub: records every authedRequest call and returns a
@@ -119,3 +121,61 @@ test('cancel/restart url-encode the delay id', async () => {
   await cancelScheduledMessage(mx, 'a/b c');
   assert.equal(calls[0][1], '/delayed_events/a%2Fb%20c');
 });
+
+test('parseDelayedEvents: Synapse shape, messages only, sendAt from running_since + delay (#322)', () => {
+  const res = {
+    delayed_events: [
+      {
+        delay_id: 'syd_a',
+        room_id: '!r:x',
+        type: 'm.room.message',
+        content: { msgtype: 'm.text', body: 'hi' },
+        delay: 60000,
+        running_since: 1000,
+      },
+      {
+        delay_id: 'syd_call',
+        room_id: '!r:x',
+        type: 'org.matrix.msc3401.call.member',
+        state_key: '_@a:x_D',
+        content: {},
+        delay: 8000,
+        running_since: 1000,
+      },
+      { delay_id: 'syd_bad', room_id: '!r:x', type: 'm.room.message', content: {} },
+      null,
+    ],
+  };
+  assert.deepEqual(parseDelayedEvents(res), [
+    { delayId: 'syd_a', roomId: '!r:x', content: { msgtype: 'm.text', body: 'hi' }, sendAt: 61000 },
+  ]);
+});
+
+test('parseDelayedEvents: MSC `scheduled` shape and garbage', () => {
+  const item = {
+    delay_id: 'd',
+    room_id: '!r:x',
+    type: 'm.room.message',
+    content: { body: 'b' },
+    delay_ms: 5,
+    delayed_since_ts: 10,
+  };
+  assert.equal(parseDelayedEvents({ scheduled: [item] })[0].sendAt, 15);
+  assert.deepEqual(parseDelayedEvents(undefined), []);
+  assert.deepEqual(parseDelayedEvents({ delayed_events: 'nope' }), []);
+});
+
+test('groupScheduledByRoom: groups and sorts by sendAt', () => {
+  const m = (delayId: string, roomId: string, sendAt: number) => ({
+    delayId,
+    roomId,
+    content: {},
+    sendAt,
+  });
+  const g = groupScheduledByRoom([m('b', '!1', 20), m('a', '!1', 10), m('c', '!2', 5)]);
+  assert.deepEqual(
+    g.get('!1')?.map((x) => x.delayId),
+    ['a', 'b'],
+  );
+  assert.equal(g.get('!2')?.length, 1);
+});

src/app/utils/scheduledMessages.ts

@@ -1,4 +1,5 @@
 import { IContent, MatrixClient, Method } from 'matrix-js-sdk';
+import type { ScheduledMessage } from '../state/scheduledMessages';
 
 /**
  * Schedule a message via MSC4140 (delayed messages).
@@ -76,3 +77,61 @@ export async function sendScheduledMessageNow(mx: MatrixClient, delayId: string)
     { prefix: '/_matrix/client/unstable/org.matrix.msc4140' },
   );
 }
+
+type DelayedEventItem = {
+  delay_id?: unknown;
+  room_id?: unknown;
+  type?: unknown;
+  state_key?: unknown;
+  content?: unknown;
+  delay?: unknown;
+  delay_ms?: unknown;
+  running_since?: unknown;
+  delayed_since_ts?: unknown;
+};
+
+/**
+ * [Gitea #322] Pure: the user's pending scheduled messages from an MSC4140
+ * `GET /delayed_events` response. Synapse answers `{ delayed_events: [...] }`;
+ * the current MSC shape is `{ scheduled: [...] }`. Call-membership delayed
+ * events share the endpoint, so only non-state `m.room.message`s are kept.
+ */
+export function parseDelayedEvents(res: unknown): ScheduledMessage[] {
+  if (!res || typeof res !== 'object') return [];
+  const r = res as { delayed_events?: unknown; scheduled?: unknown };
+  const list = Array.isArray(r.delayed_events) ? r.delayed_events : r.scheduled;
+  if (!Array.isArray(list)) return [];
+  const out: ScheduledMessage[] = [];
+  list.forEach((raw: DelayedEventItem) => {
+    if (!raw || typeof raw !== 'object') return;
+    if (raw.type !== 'm.room.message' || raw.state_key !== undefined) return;
+    if (typeof raw.delay_id !== 'string' || typeof raw.room_id !== 'string') return;
+    if (!raw.content || typeof raw.content !== 'object') return;
+    const delay = Number(raw.delay ?? raw.delay_ms);
+    const since = Number(raw.running_since ?? raw.delayed_since_ts);
+    if (!Number.isFinite(delay) || !Number.isFinite(since)) return;
+    out.push({
+      delayId: raw.delay_id,
+      roomId: raw.room_id,
+      content: raw.content as IContent,
+      sendAt: since + delay,
+    });
+  });
+  return out;
+}
+
+/** The user's pending scheduled messages, as the server has them. */
+export async function fetchScheduledMessages(mx: MatrixClient): Promise<ScheduledMessage[]> {
+  const res = await mx.http.authedRequest(Method.Get, '/delayed_events', undefined, undefined, {
+    prefix: '/_matrix/client/unstable/org.matrix.msc4140',
+  });
+  return parseDelayedEvents(res);
+}
+
+/** Group by room, the shape of `scheduledMessagesAtom`. */
+export function groupScheduledByRoom(msgs: ScheduledMessage[]): Map<string, ScheduledMessage[]> {
+  const map = new Map<string, ScheduledMessage[]>();
+  msgs.forEach((m) => map.set(m.roomId, [...(map.get(m.roomId) ?? []), m]));
+  map.forEach((list) => list.sort((a, b) => a.sendAt - b.sendAt));
+  return map;
+}

src/types/matrix/accountData.ts

@@ -26,10 +26,6 @@ export enum AccountDataEvent {
   // [Gitea #104] Synced subset of the Lotus Settings object (utils/settingsSync).
   LotusSettings = 'io.lotus.settings',
 
-  // [Gitea #333] Timed mutes: { timers: { [roomId]: unmuteAt } }, so any Lotus
-  // device can lift a mute set on another.
-  LotusMuteTimers = 'io.lotus.mute_timers',
-
   SecretStorageDefaultKey = 'm.secret_storage.default_key',
 
   CrossSigningMaster = 'm.cross_signing.master',