This cool function

export const calculateUserTimekeeping = (timekeeping_data: any, project: Project, user: ProjectUser) => {
    const time_traveled = timekeeping_data.inbound_travel_time + timekeeping_data.outbound_travel_time;
    const fatigue_total = (parseInt(project.fatigue_hours, 0) * 60) + parseInt(project.fatigue_minutes, 0);

    let time_on_site;
    if (timekeeping_data.time_out === null) {
        const now = moment(new Date());
        const duration = moment.duration(now.diff(timekeeping_data.time_in));
        time_on_site = duration.asMinutes();
    } else {
        const now = moment(timekeeping_data.time_out);
        const duration = moment.duration(now.diff(timekeeping_data.time_in));
        time_on_site = duration.asMinutes();
    }

    let exceedance_hours;
    if (project.fatigue_type.toLocaleLowerCase() === 'door to door') {
        exceedance_hours = (time_on_site + time_traveled) - fatigue_total;
    } else {
        exceedance_hours = (time_on_site) - fatigue_total;
    }

    const door_to_door = time_on_site + time_traveled;

    let color;
    const color_calc = project.fatigue_type.toLocaleLowerCase() === 'door to door' ?
        (time_traveled + time_on_site) / fatigue_total * 100 :
        time_on_site / fatigue_total * 100;
    if (color_calc >= 100) {
        color = 'red';
    } else if (color_calc >= 76) {
        color = 'orange';
    } else {
        color = 'green';
    }

    const time_travelled = parseInt(timekeeping_data.inbound_travel_time, 0) + parseInt(timekeeping_data.outbound_travel_time, 0);

    let time_remaining;
    let time_worked;

    if (project.fatigue_type.toLocaleLowerCase() !== 'door to door') {
        time_remaining = fatigue_total - time_on_site;
        time_worked = time_on_site;
    } else {
        time_remaining = fatigue_total -
            (parseInt(minutesToHoursAndMinutes(timekeeping_data.time_in, 'mm'), 0) - time_traveled) -
            (parseInt(minutesToHoursAndMinutes(timekeeping_data.time_out, 'mm'), 0));
        time_worked = time_on_site + time_traveled;
    }

    const pct_time_left = (fatigue_total - time_on_site - time_traveled / fatigue_total) * 100;
    const pct_time_worked = (time_worked / fatigue_total) * 100;

    const user_timekeeping: Timekeeping = {
        user_id: user.id,
        time_in: timekeeping_data.time_in,
        time_out: timekeeping_data.time_out,
        inbound_travel_time: timekeeping_data.inbound_travel_time,
        outbound_travel_time: timekeeping_data.outbound_travel_time,
        time_on_site: time_on_site,
        time_travelled: time_travelled.toString(),
        fatigue_total: fatigue_total.toString(),
        fatigue_type: project.fatigue_type,
        time_remaining: time_remaining,
        time_worked: time_worked,
        pct_time_left: pct_time_left,
        pct_time_worked: pct_time_worked,
        color: color
    };

    return user_timekeeping;
};