snapshot of https://github.com/RocketChat/Rocket.Chat.git (develop, 2026-09-16; blobs > 131072B omitted)

apps/meteor/server/lib/messaging/unread/unreadMessages.ts

@@ -0,0 +1,95 @@
+import type { IMessage, IRoom } from '@rocket.chat/core-typings';
+import type { ServerMethods } from '@rocket.chat/ddp-client';
+import { Messages, Subscriptions } from '@rocket.chat/models';
+import { Meteor } from 'meteor/meteor';
+
+import logger from './logger';
+import { methodDeprecationLogger } from '../../deprecationWarningLogger';
+import { notifyOnSubscriptionChangedByRoomIdAndUserId } from '../../notifyListener';
+
+declare module '@rocket.chat/ddp-client' {
+	// eslint-disable-next-line @typescript-eslint/naming-convention
+	interface ServerMethods {
+		unreadMessages(firstUnreadMessage?: Pick<IMessage, '_id'>, room?: IRoom['_id']): void;
+	}
+}
+
+export const unreadMessages = async (userId: string, firstUnreadMessage?: Pick<IMessage, '_id'>, room?: IRoom['_id']): Promise<void> => {
+	if (room && typeof room === 'string') {
+		const lastMessage = (
+			await Messages.findVisibleByRoomId(room, {
+				limit: 1,
+				sort: { ts: -1 },
+			}).toArray()
+		)[0];
+
+		if (!lastMessage) {
+			throw new Meteor.Error('error-no-message-for-unread', 'There are no messages to mark unread', {
+				method: 'unreadMessages',
+				action: 'Unread_messages',
+			});
+		}
+
+		const setAsUnreadResponse = await Subscriptions.setAsUnreadByRoomIdAndUserId(lastMessage.rid, userId, lastMessage.ts);
+		if (setAsUnreadResponse.modifiedCount) {
+			void notifyOnSubscriptionChangedByRoomIdAndUserId(lastMessage.rid, userId);
+		}
+
+		return;
+	}
+
+	if (typeof firstUnreadMessage?._id !== 'string') {
+		throw new Meteor.Error('error-action-not-allowed', 'Not allowed', {
+			method: 'unreadMessages',
+			action: 'Unread_messages',
+		});
+	}
+
+	const originalMessage = await Messages.findOneById(firstUnreadMessage._id, {
+		projection: {
+			u: 1,
+			rid: 1,
+			ts: 1,
+		},
+	});
+	if (!originalMessage || userId === originalMessage.u._id) {
+		throw new Meteor.Error('error-action-not-allowed', 'Not allowed', {
+			method: 'unreadMessages',
+			action: 'Unread_messages',
+		});
+	}
+	const lastSeen = (await Subscriptions.findOneByRoomIdAndUserId(originalMessage.rid, userId))?.ls;
+	if (!lastSeen) {
+		throw new Meteor.Error('error-subscription-not-found', 'Subscription not found', {
+			method: 'unreadMessages',
+			action: 'Unread_messages',
+		});
+	}
+
+	if (originalMessage.ts >= lastSeen) {
+		return logger.debug('Provided message is already marked as unread');
+	}
+
+	logger.debug({
+		msg: 'Updating unread message as the first unread',
+		timestamp: originalMessage.ts,
+	});
+	const setAsUnreadResponse = await Subscriptions.setAsUnreadByRoomIdAndUserId(originalMessage.rid, userId, originalMessage.ts);
+	if (setAsUnreadResponse.modifiedCount) {
+		void notifyOnSubscriptionChangedByRoomIdAndUserId(originalMessage.rid, userId);
+	}
+};
+
+Meteor.methods<ServerMethods>({
+	async unreadMessages(firstUnreadMessage, room) {
+		methodDeprecationLogger.method('unreadMessages', '9.0.0', '/v1/subscriptions.unread');
+		const userId = Meteor.userId();
+		if (!userId) {
+			throw new Meteor.Error('error-invalid-user', 'Invalid user', {
+				method: 'unreadMessages',
+			});
+		}
+
+		return unreadMessages(userId, firstUnreadMessage, room);
+	},
+});