Add mark as unread option to the room menu on sidebar

packages/rocketchat-message-mark-as-unread/server/unreadMessages.js

 import logger from './logger';
 Meteor.methods({
-	unreadMessages(firstUnreadMessage) {
-		if (!Meteor.userId()) {
+	unreadMessages(firstUnreadMessage, room) {
+		const userId = Meteor.userId();
+		if (!userId) {
 			throw new Meteor.Error('error-invalid-user', 'Invalid user', {
 				method: 'unreadMessages'
 			});
 		}
+
+		if (room) {
+			const lastMessage = RocketChat.models.Messages.findVisibleByRoomId(room, {limit: 1, sort: {ts: -1}}).fetch()[0];
+
+			if (lastMessage == null) {
+				throw new Meteor.Error('error-action-not-allowed', 'Not allowed', {
+					method: 'unreadMessages',
+					action: 'Unread_messages'
+				});
+			}
+
+			return RocketChat.models.Subscriptions.setAsUnreadByRoomIdAndUserId(lastMessage.rid, userId, lastMessage.ts);
+		}
+
 		const originalMessage = RocketChat.models.Messages.findOneById(firstUnreadMessage._id, {
 			fields: {
 				u: 1,
@@ -14,17 +29,17 @@ Meteor.methods({
 				ts: 1
 			}
 		});
-		if (originalMessage == null || Meteor.userId() === originalMessage.u._id) {
+		if (originalMessage == null || userId === originalMessage.u._id) {
 			throw new Meteor.Error('error-action-not-allowed', 'Not allowed', {
 				method: 'unreadMessages',
 				action: 'Unread_messages'
 			});
 		}
-		const lastSeen = RocketChat.models.Subscriptions.findOneByRoomIdAndUserId(originalMessage.rid, Meteor.userId()).ls;
+		const lastSeen = RocketChat.models.Subscriptions.findOneByRoomIdAndUserId(originalMessage.rid, userId).ls;
 		if (firstUnreadMessage.ts >= lastSeen) {
 			return logger.connection.debug('Provided message is already marked as unread');
 		}
 		logger.connection.debug(`Updating unread  message of ${ originalMessage.ts } as the first unread`);
-		return RocketChat.models.Subscriptions.setAsUnreadByRoomIdAndUserId(originalMessage.rid, Meteor.userId(), originalMessage.ts);
+		return RocketChat.models.Subscriptions.setAsUnreadByRoomIdAndUserId(originalMessage.rid, userId, originalMessage.ts);
 	}
 });

packages/rocketchat-ui-sidenav/client/sidebarItem.js

@@ -107,6 +107,13 @@ Template.sidebarItem.events({
 				type: 'sidebar-item',
 				id: 'read'
 			});
+		} else {
+			items.push({
+				icon: 'flag',
+				name: t('Mark_as_unread'),
+				type: 'sidebar-item',
+				id: 'unread'
+			});
 		}
 
 		if (canFavorite) {

packages/rocketchat-ui/client/views/app/popover.js

@@ -183,8 +183,9 @@ Template.popover.events({
 	'click [data-type="sidebar-item"]'(e, instance) {
 		popover.close();
 		const { rid, name, template } = instance.data.data;
+		const action = e.currentTarget.dataset.id;
 
-		if (e.currentTarget.dataset.id === 'hide') {
+		if (action === 'hide') {
 			const warnText = RocketChat.roomTypes.roomTypes[template].getUiText(UiTextContext.HIDE_WARNING);
 
 			modal.open({
@@ -214,7 +215,7 @@ Template.popover.events({
 			return false;
 		}
 
-		if (e.currentTarget.dataset.id === 'leave') {
+		if (action === 'leave') {
 			let warnText;
 			switch (template) {
 				case 'c': warnText = 'Leave_Room_Warning'; break;
@@ -258,12 +259,30 @@ Template.popover.events({
 			return false;
 		}
 
-		if (e.currentTarget.dataset.id === 'read') {
+		if (action === 'read') {
 			Meteor.call('readMessages', rid);
 			return false;
 		}
 
-		if (e.currentTarget.dataset.id === 'favorite') {
+		if (action === 'unread') {
+			Meteor.call('unreadMessages', null, rid, function(error) {
+				if (error) {
+					return handleError(error);
+				}
+
+				const subscription = ChatSubscription.findOne({rid});
+				if (subscription == null) {
+					return;
+				}
+				RoomManager.close(subscription.t + subscription.name);
+
+				FlowRouter.go('home');
+			});
+
+			return false;
+		}
+
+		if (action === 'favorite') {
 			Meteor.call('toggleFavorite', rid, !$(e.currentTarget).hasClass('rc-popover__item--star-filled'), function(err) {
 				popover.close();
 				if (err) {