piglow-animations/lib/TimeRange.js

piglow-animations is an extension for piglow that adds animation capabilities

var TIMES_CONSTANT = 'times';

/**
 * identifies and parses time ranges
 * @param times
 * @param unit
 * @constructor
 */
function TimeRange(times, unit) {
    this._unit = unit || TIMES_CONSTANT;
    this._num = times || null;
}

TimeRange.prototype.unit = function () {
    return this._unit;
};

TimeRange.prototype.times = function () {
    return this._num;
};

/**
 * parse time ranges
 * @param entity
 * @return {TimeRange}
 */
TimeRange.interprete = function timeInterpreter(entity) {
    if (!isNaN(entity)) {
        entity = parseInt(entity, 10);

        return new TimeRange(entity, 'times');
    }

    var matches = entity.match(/^([0-9.]+)(ms|s|min|times|time)$/);

    if (matches) {
        var unit = matches[2];
        var times = parseFloat(matches[1]);

        if (unit === 's') {
            times *= 1000;
            unit = 'ms';
        }

        if (unit === 'min') {
            times = times * 60 * 1000;
            unit = 'ms';
        }

        return new TimeRange(times, unit);
    }

    throw new Error('wrong Timeformat: ' + entity);
};

TimeRange.TIMES = TIMES_CONSTANT;

module.exports = TimeRange;