RocketChat/Rocket.Chat

import type { IVoipRoom } from '@rocket.chat/core-typings';
import { PbxEvents } from '@rocket.chat/models';

export const calculateOnHoldTimeForRoom = async (room: IVoipRoom, closedAt: Date): Promise<number> => {
    if (!room.callUniqueId) {
        return 0;
    }

    const events = await PbxEvents.findByEvents(room.callUniqueId, ['Hold', 'Unhold']).toArray();
    if (!events.length) {
        // if there's no events, that means no hold time
        return 0;
    }

    if (events.length === 1 && events[0].event === 'Unhold') {
        // if the only event is an unhold event, something bad happened
        return 0;
    }

    if (events.length === 1 && events[0].event === 'Hold') {
        // if the only event is a hold event, the call was ended while on hold
        // hold time = room.closedAt - event.ts
        return closedAt.getTime() - events[0].ts.getTime();
    }

    let currentOnHoldTime = 0;

    for (let i = 0; i < events.length; i += 2) {
        const onHold = events[i].ts;
        const unHold = events[i + 1]?.ts || closedAt;

        currentOnHoldTime += unHold.getTime() - onHold.getTime();
    }

    return currentOnHoldTime;
};