fix: New message marker is not displayed when the chat opened offline

src/hooks/useNetwork.ts

@@ -6,14 +6,14 @@ type UseNetworkProps = {
     onReconnect?: () => void;
 };
 
-type UseNetwork = {isOffline: boolean};
+type UseNetwork = {isOffline: boolean; lastOfflineAt?: Date};
 
 export default function useNetwork({onReconnect = () => {}}: UseNetworkProps = {}): UseNetwork {
     const callback = useRef(onReconnect);
     // eslint-disable-next-line react-compiler/react-compiler
     callback.current = onReconnect;
 
-    const {isOffline, networkStatus} = useContext(NetworkContext) ?? {...CONST.DEFAULT_NETWORK_DATA, networkStatus: CONST.NETWORK.NETWORK_STATUS.UNKNOWN};
+    const {isOffline, networkStatus, lastOfflineAt} = useContext(NetworkContext) ?? {...CONST.DEFAULT_NETWORK_DATA, networkStatus: CONST.NETWORK.NETWORK_STATUS.UNKNOWN};
     const prevOfflineStatusRef = useRef(isOffline);
     useEffect(() => {
         // If we were offline before and now we are not offline then we just reconnected
@@ -31,5 +31,5 @@ export default function useNetwork({onReconnect = () => {}}: UseNetworkProps = {
     }, [isOffline]);
 
     // If the network status is undefined, we don't treat it as offline. Otherwise, we utilize the isOffline prop.
-    return {isOffline: networkStatus === CONST.NETWORK.NETWORK_STATUS.UNKNOWN ? false : isOffline};
+    return {isOffline: networkStatus === CONST.NETWORK.NETWORK_STATUS.UNKNOWN ? false : isOffline, lastOfflineAt};
 }

src/hooks/useNetworkWithOfflineStatus.ts

@@ -3,26 +3,31 @@ import {useEffect, useRef} from 'react';
 import DateUtils from '@libs/DateUtils';
 import useLocalize from './useLocalize';
 import useNetwork from './useNetwork';
+import usePrevious from './usePrevious';
 
 type UseNetworkWithOfflineStatus = {isOffline: boolean; lastOfflineAt: MutableRefObject<Date | undefined>; lastOnlineAt: MutableRefObject<Date | undefined>};
 
 export default function useNetworkWithOfflineStatus(): UseNetworkWithOfflineStatus {
-    const {isOffline} = useNetwork();
+    const {isOffline, lastOfflineAt: lastOfflineAtFromOnyx} = useNetwork();
+    const prevIsOffline = usePrevious(isOffline);
     const {preferredLocale} = useLocalize();
 
     // The last time/date the user went/was offline. If the user was never offline, it is set to undefined.
-    const lastOfflineAt = useRef(isOffline ? DateUtils.getLocalDateFromDatetime(preferredLocale) : undefined);
+    const lastOfflineAt = useRef(isOffline ? lastOfflineAtFromOnyx : undefined);
 
     // The last time/date the user went/was online. If the user was never online, it is set to undefined.
     const lastOnlineAt = useRef(isOffline ? undefined : DateUtils.getLocalDateFromDatetime(preferredLocale));
 
     useEffect(() => {
-        if (isOffline) {
+        // If the user has just gone offline (was online before but is now offline), update `lastOfflineAt` with the current local date/time.
+        if (isOffline && !prevIsOffline) {
             lastOfflineAt.current = DateUtils.getLocalDateFromDatetime(preferredLocale);
-        } else {
+        }
+        // If the user has just come back online (was offline before but is now online), update `lastOnlineAt` with the current local date/time.
+        if (!isOffline && prevIsOffline) {
             lastOnlineAt.current = DateUtils.getLocalDateFromDatetime(preferredLocale);
         }
-    }, [isOffline, preferredLocale]);
+    }, [isOffline, preferredLocale, prevIsOffline]);
 
     return {isOffline, lastOfflineAt, lastOnlineAt};
 }

src/libs/DateUtils.ts

@@ -43,6 +43,7 @@ import ONYXKEYS from '@src/ONYXKEYS';
 import {timezoneBackwardMap} from '@src/TIMEZONES';
 import type {SelectedTimezone, Timezone} from '@src/types/onyx/PersonalDetails';
 import {setCurrentDate} from './actions/CurrentDate';
+import {setNetworkLastOffline} from './actions/Network';
 import {translate, translateLocal} from './Localize';
 import Log from './Log';
 
@@ -88,6 +89,35 @@ Onyx.connect({
     callback: (value) => (networkTimeSkew = value?.timeSkew ?? 0),
 });
 
+let isOffline: boolean | undefined;
+
+let preferredLocaleFromOnyx: Locale;
+
+Onyx.connect({
+    key: ONYXKEYS.NVP_PREFERRED_LOCALE,
+    callback: (value) => {
+        if (!value) {
+            return;
+        }
+        preferredLocaleFromOnyx = value;
+    },
+});
+
+Onyx.connect({
+    key: ONYXKEYS.NETWORK,
+    callback: (val) => {
+        if (!val?.lastOfflineAt) {
+            setNetworkLastOffline(getLocalDateFromDatetime(preferredLocaleFromOnyx));
+        }
+
+        const newIsOffline = val?.isOffline ?? val?.shouldForceOffline;
+        if (newIsOffline && isOffline === false) {
+            setNetworkLastOffline(getLocalDateFromDatetime(preferredLocaleFromOnyx));
+        }
+        isOffline = newIsOffline;
+    },
+});
+
 function isDate(arg: unknown): arg is Date {
     return Object.prototype.toString.call(arg) === '[object Date]';
 }

src/libs/ReportActionsUtils.ts

@@ -1900,13 +1900,8 @@ function getReportActionsLength() {
 }
 
 function wasActionCreatedWhileOffline(action: ReportAction, isOffline: boolean, lastOfflineAt: Date | undefined, lastOnlineAt: Date | undefined, locale: Locale): boolean {
-    // The user was never online.
-    if (!lastOnlineAt) {
-        return true;
-    }
-
-    // The user never was never offline.
-    if (!lastOfflineAt) {
+    // The user has never gone offline or never come back online
+    if (!lastOfflineAt || !lastOnlineAt) {
         return false;
     }
 

src/libs/actions/Network.ts

@@ -4,14 +4,18 @@ import type {NetworkStatus} from '@libs/NetworkConnection';
 import ONYXKEYS from '@src/ONYXKEYS';
 import type {ConnectionChanges} from '@src/types/onyx/Network';
 
-function setIsOffline(isOffline: boolean, reason = '') {
+function setNetworkLastOffline(lastOfflineAt: Date) {
+    Onyx.merge(ONYXKEYS.NETWORK, {lastOfflineAt});
+}
+
+function setIsOffline(isNetworkOffline: boolean, reason = '') {
     if (reason) {
         let textToLog = '[Network] Client is';
-        textToLog += isOffline ? ' entering offline mode' : ' back online';
+        textToLog += isNetworkOffline ? ' entering offline mode' : ' back online';
         textToLog += ` because: ${reason}`;
         Log.info(textToLog);
     }
-    Onyx.merge(ONYXKEYS.NETWORK, {isOffline});
+    Onyx.merge(ONYXKEYS.NETWORK, {isOffline: isNetworkOffline});
 }
 
 function setNetWorkStatus(status: NetworkStatus) {
@@ -50,4 +54,14 @@ function setConnectionChanges(connectionChanges: ConnectionChanges) {
     Onyx.merge(ONYXKEYS.NETWORK, {connectionChanges});
 }
 
-export {setIsOffline, setShouldForceOffline, setConnectionChanges, setShouldSimulatePoorConnection, setPoorConnectionTimeoutID, setShouldFailAllRequests, setTimeSkew, setNetWorkStatus};
+export {
+    setIsOffline,
+    setShouldForceOffline,
+    setConnectionChanges,
+    setShouldSimulatePoorConnection,
+    setPoorConnectionTimeoutID,
+    setShouldFailAllRequests,
+    setTimeSkew,
+    setNetWorkStatus,
+    setNetworkLastOffline,
+};

src/types/onyx/Network.ts

@@ -34,6 +34,9 @@ type Network = {
 
     /** The network's status */
     networkStatus?: NetworkStatus;
+
+    /** The time when network change from online to offline */
+    lastOfflineAt?: Date;
 };
 
 export default Network;