@visx/vendor/vendor-cjs/d3-time/src/interval.js

vendored packages for visx

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.timeInterval = timeInterval;
const t0 = new Date(),
  t1 = new Date();
function timeInterval(floori, offseti, count, field) {
  function interval(date) {
    return floori(date = arguments.length === 0 ? new Date() : new Date(+date)), date;
  }
  interval.floor = date => {
    return floori(date = new Date(+date)), date;
  };
  interval.ceil = date => {
    return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date;
  };
  interval.round = date => {
    const d0 = interval(date),
      d1 = interval.ceil(date);
    return date - d0 < d1 - date ? d0 : d1;
  };
  interval.offset = (date, step) => {
    return offseti(date = new Date(+date), step == null ? 1 : Math.floor(step)), date;
  };
  interval.range = (start, stop, step) => {
    const range = [];
    start = interval.ceil(start);
    step = step == null ? 1 : Math.floor(step);
    if (!(start < stop) || !(step > 0)) return range; // also handles Invalid Date
    let previous;
    do range.push(previous = new Date(+start)), offseti(start, step), floori(start); while (previous < start && start < stop);
    return range;
  };
  interval.filter = test => {
    return timeInterval(date => {
      if (date >= date) while (floori(date), !test(date)) date.setTime(date - 1);
    }, (date, step) => {
      if (date >= date) {
        if (step < 0) while (++step <= 0) {
          while (offseti(date, -1), !test(date)) {} // eslint-disable-line no-empty
        } else while (--step >= 0) {
          while (offseti(date, +1), !test(date)) {} // eslint-disable-line no-empty
        }
      }
    });
  };

  if (count) {
    interval.count = (start, end) => {
      t0.setTime(+start), t1.setTime(+end);
      floori(t0), floori(t1);
      return Math.floor(count(t0, t1));
    };
    interval.every = step => {
      step = Math.floor(step);
      return !isFinite(step) || !(step > 0) ? null : !(step > 1) ? interval : interval.filter(field ? d => field(d) % step === 0 : d => interval.count(0, d) % step === 0);
    };
  }
  return interval;
}