Fix full reconnect onyx updates being ignored after merging accounts

src/libs/actions/OnyxUpdates.ts

@@ -1,7 +1,7 @@
 import type {OnyxUpdate} from 'react-native-onyx';
 import Onyx from 'react-native-onyx';
 import type {Merge} from 'type-fest';
-import {WRITE_COMMANDS} from '@libs/API/types';
+import {SIDE_EFFECT_REQUEST_COMMANDS, WRITE_COMMANDS} from '@libs/API/types';
 import Log from '@libs/Log';
 import Performance from '@libs/Performance';
 import PusherUtils from '@libs/PusherUtils';
@@ -114,7 +114,11 @@ function apply({lastUpdateID, type, request, response, updates}: OnyxUpdatesFrom
 function apply({lastUpdateID, type, request, response, updates}: OnyxUpdatesFromServer): Promise<void | Response> | undefined {
     Log.info(`[OnyxUpdateManager] Applying update type: ${type} with lastUpdateID: ${lastUpdateID}`, false, {command: request?.command});
 
-    if (lastUpdateID && lastUpdateIDAppliedToClient && Number(lastUpdateID) <= lastUpdateIDAppliedToClient && request?.command !== WRITE_COMMANDS.OPEN_APP) {
+    const isUpdateOld = lastUpdateID && lastUpdateIDAppliedToClient && Number(lastUpdateID) <= lastUpdateIDAppliedToClient;
+    const isOpenAppRequest = request?.command === WRITE_COMMANDS.OPEN_APP;
+    const isFullReconnectRequest = request?.command === SIDE_EFFECT_REQUEST_COMMANDS.RECONNECT_APP && !request?.data?.updateIDFrom;
+
+    if (isUpdateOld && !isOpenAppRequest && !isFullReconnectRequest) {
         Log.info('[OnyxUpdateManager] Update received was older than or the same as current state, returning without applying the updates other than successData and failureData', false, {
             lastUpdateID,
             lastUpdateIDAppliedToClient,

tests/unit/OnyxUpdatesTest.ts

@@ -1,5 +1,6 @@
 import type {OnyxKey} from 'react-native-onyx';
 import Onyx from 'react-native-onyx';
+import {SIDE_EFFECT_REQUEST_COMMANDS} from '@libs/API/types';
 import CONST from '@src/CONST';
 import * as OnyxUpdates from '@src/libs/actions/OnyxUpdates';
 import DateUtils from '@src/libs/DateUtils';
@@ -64,6 +65,41 @@ describe('OnyxUpdatesTest', () => {
                 expect(reportAction).toStrictEqual(reportActionValue);
             });
     });
+
+    it('applies full ReconnectApp Onyx updates even if they appear old', async () => {
+        // Given the current lastUpdateIDAppliedToClient is merged
+        const currentUpdateID = 100;
+        await Onyx.merge(ONYXKEYS.ONYX_UPDATES_LAST_UPDATE_ID_APPLIED_TO_CLIENT, currentUpdateID);
+
+        // And we received onyx updates from a full ReconnectApp request with the same lastUpdateID
+        const reportID = NumberUtils.rand64();
+        const reportValue = {reportID};
+        const fullReconnectUpdates: OnyxUpdatesFromServer = {
+            type: CONST.ONYX_UPDATE_TYPES.HTTPS,
+            request: {
+                command: SIDE_EFFECT_REQUEST_COMMANDS.RECONNECT_APP,
+                data: {
+                    updateIDFrom: null,
+                },
+            },
+            response: {
+                onyxData: [
+                    {
+                        onyxMethod: 'merge',
+                        key: `${ONYXKEYS.COLLECTION.REPORT}${reportID}`,
+                        value: reportValue,
+                    },
+                ],
+            },
+            previousUpdateID: currentUpdateID - 2,
+            lastUpdateID: currentUpdateID - 1,
+        };
+
+        // When we apply the updates, then they are still applied even if the lastUpdateID is old
+        await OnyxUpdates.apply(fullReconnectUpdates);
+        const report = await getOnyxValue(`${ONYXKEYS.COLLECTION.REPORT}${reportID}`);
+        expect(report).toStrictEqual(reportValue);
+    });
 });
 
 function getOnyxValues<TKey extends OnyxKey>(...keys: TKey[]) {