SolarEnergy/central_frontend/src/utils/DateUtils.ts

import dayjs, { Dayjs } from "dayjs";

/**
 * Get current UNIX time, in seconds
 */
export function time(): number {
  return Math.floor(new Date().getTime() / 1000);
}

/**
 * Get dayjs representation of given time of day
 */
export function timeOfDay(time: number): Dayjs {
  const hours = Math.floor(time / 3600);
  const minutes = Math.floor(time / 60) - hours * 60;

  return dayjs(
    `2022-04-17T${hours.toString().padStart(2, "0")}:${minutes
      .toString()
      .padStart(2, "0")}`
  );
}

/**
 * Get time of day (in secs) from a given dayjs representation
 */
export function dayjsToTimeOfDay(d: Dayjs): number {
  return d.hour() * 3600 + d.minute() * 60 + d.second();
}