Duffer Derek

import {timeInterval} from "./interval.js";
import {durationHour, durationMinute, durationSecond} from "./duration.js";

export const timeHour = timeInterval((date) => {
  date.setTime(date - date.getMilliseconds() - date.getSeconds() * durationSecond - date.getMinutes() * durationMinute);
}, (date, step) => {
  date.setTime(+date + step * durationHour);
}, (start, end) => {
  return (end - start) / durationHour;
}, (date) => {
  return date.getHours();
});

export const timeHours = timeHour.range;

export const utcHour = timeInterval((date) => {
  date.setUTCMinutes(0, 0, 0);
}, (date, step) => {
  date.setTime(+date + step * durationHour);
}, (start, end) => {
  return (end - start) / durationHour;
}, (date) => {
  return date.getUTCHours();
});

export const utcHours = utcHour.range;