javascript-time-ago/commonjs/steps/getTimeToNextUpdateForUnit.js

Localized relative date/time formatting

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = getTimeToNextUpdateForUnit;
var _units = require("./units.js");
var _round = require("../round.js");
/**
 * Gets the time to next update for a step with a time unit defined.
 * @param  {string} unit
 * @param  {number} date — The date passed to `.format()`, converted to a timestamp.
 * @param  {number} options.now
 * @param  {string} [options.round] — (undocumented) Rounding mechanism.
 * @return {number} [timeToNextUpdate]
 */
function getTimeToNextUpdateForUnit(unit, timestamp, _ref) {
  var now = _ref.now,
    round = _ref.round;
  // For some units, like "now", there's no defined amount of seconds in them.
  if (!(0, _units.getSecondsInUnit)(unit)) {
    // If there's no amount of seconds defined for this unit
    // then the update interval can't be determined reliably.
    return;
  }
  var unitDenominator = (0, _units.getSecondsInUnit)(unit) * 1000;
  var future = timestamp > now;
  var preciseAmount = Math.abs(timestamp - now);
  var roundedAmount = (0, _round.getRoundFunction)(round)(preciseAmount / unitDenominator) * unitDenominator;
  if (future) {
    if (roundedAmount > 0) {
      // Amount decreases with time.
      return preciseAmount - roundedAmount + getDiffToPreviousRoundedNumber(round, unitDenominator);
    } else {
      // Refresh right after the zero point,
      // when "future" changes to "past".
      return preciseAmount - roundedAmount + 1;
    }
  }
  // Amount increases with time.
  return -(preciseAmount - roundedAmount) + getDiffToNextRoundedNumber(round, unitDenominator);
}
function getDiffToNextRoundedNumber(round, unitDenominator) {
  return (0, _round.getDiffRatioToNextRoundedNumber)(round) * unitDenominator;
}
function getDiffToPreviousRoundedNumber(round, unitDenominator) {
  return (1 - (0, _round.getDiffRatioToNextRoundedNumber)(round)) * unitDenominator + 1;
}
//# sourceMappingURL=getTimeToNextUpdateForUnit.js.map