RocketChat/Rocket.Chat

import type { IOmnichannelRoom } from '@rocket.chat/core-typings';
import { isEditedMessage, isOmnichannelRoom } from '@rocket.chat/core-typings';
import { LivechatRooms } from '@rocket.chat/models';
import moment from 'moment';

import { settings } from '../../../../../app/settings/server';
import { callbacks } from '../../../../../lib/callbacks';
import { setPredictedVisitorAbandonmentTime } from '../lib/Helper';

callbacks.add(
    'afterSaveMessage',
    async (message, room) => {
        if (!isOmnichannelRoom(room)) {
            return message;
        }

        if (
            !settings.get('Livechat_abandoned_rooms_action') ||
            settings.get('Livechat_abandoned_rooms_action') === 'none' ||
            settings.get<number>('Livechat_visitor_inactivity_timeout') <= 0
        ) {
            return message;
        }
        // skips this callback if the message was edited
        if (isEditedMessage(message)) {
            return message;
        }
        // if the message has a type means it is a special message (like the closing comment), so skip it
        if (message.t) {
            return message;
        }
        // message from visitor
        if (message.token) {
            return message;
        }

        const latestRoom = await LivechatRooms.findOneById<Pick<IOmnichannelRoom, '_id' | 'responseBy' | 'departmentId'>>(room._id, {
            projection: {
                _id: 1,
                responseBy: 1,
                departmentId: 1,
            },
        });

        if (!latestRoom?.responseBy) {
            return message;
        }

        if (moment(latestRoom.responseBy.firstResponseTs).isSame(moment(message.ts))) {
            await setPredictedVisitorAbandonmentTime(latestRoom);
        }

        return message;
    },
    callbacks.priority.MEDIUM,
    'save-visitor-inactivity',
); // This hook priority should always be less than the priority of hook "markRoomResponded" bcs, the room.responseBy.firstMessage property set there is being used here for determining visitor abandonment