moment-round/src/moment-round.js

Date rounding for Moment.js

(function() {

  var moment = (typeof require !== "undefined" && require !== null) && !require.amd ? require("moment") : this.moment;

  moment.fn.round = function(precision, key, direction) {
    if(typeof direction === 'undefined') {
      direction = 'round';
    }

    var keys = ['Hours', 'Minutes', 'Seconds', 'Milliseconds'];
    var maxValues = [24, 60, 60, 1000];
    
    // Capitalize first letter
    key = key.charAt(0).toUpperCase() + key.slice(1).toLowerCase();

    // make sure key is plural
    if (key.indexOf('s', key.length - 1) === -1) {
      key += 's';
    }
    var value = 0;
    var rounded = false;
    var subRatio = 1;
    var maxValue ;
    for (var i in keys) {
      var k = keys[i];
      if (k === key) {
        value = this._d['get' + key]();
        maxValue = maxValues[i];
        rounded = true;
      } else if(rounded) {
        subRatio *= maxValues[i];
        value += this._d['get' + k]() / subRatio;
        this._d['set' + k](0);
      }
    };

    value = Math[direction](value / precision) * precision;
    value = Math.min(value, maxValue);
    this._d['set' + key](value);

    return this;
  }

  moment.fn.ceil = function(precision, key) {
    return this.round(precision, key, 'ceil');
  }

  moment.fn.floor = function(precision, key) {
    return this.round(precision, key, 'floor');
  }

  if ((typeof module !== "undefined" && module !== null ? module.exports : void 0) != null) {
    module.exports = moment;
  }
}).call(this);