Asymmetrik/ngx-starter

import { DateTime } from 'luxon';

export class UtcDateUtils {
    private static defaultFormat = 'yyyy-MM-dd HH:mm:ss';

    static format(
        value: string | number | Date | DateTime | null | undefined,
        format?: string
    ): string {
        if (value) {
            let luxonDate;
            if (value instanceof DateTime) {
                luxonDate = value;
            } else if (value instanceof Date) {
                luxonDate = DateTime.fromJSDate(value).toUTC();
            } else if (typeof value === 'number') {
                luxonDate = DateTime.fromMillis(value).toUTC();
            } else {
                luxonDate = DateTime.fromISO(value).toUTC();

                if (!luxonDate.isValid) {
                    luxonDate = DateTime.fromFormat(value, 'D').toUTC();
                }
                if (!luxonDate.isValid) {
                    luxonDate = DateTime.fromFormat(value, 'M-d-yyyy').toUTC();
                }
                if (!luxonDate.isValid) {
                    // converts a string of milliseconds into a number
                    value = +value;
                    luxonDate = DateTime.fromMillis(value).toUTC();
                }
            }

            if (luxonDate?.isValid) {
                return luxonDate.toFormat(format || UtcDateUtils.defaultFormat);
            }
        }

        return '-';
    }
}