import hasOwnProp from '../utils/has-own-prop';

var priorities = {
    date: 9,
    day: 11,
    weekday: 11,
    isoWeekday: 11,
    dayOfYear: 4,
    hour: 13,
    millisecond: 16,
    minute: 14,
    month: 8,
    quarter: 7,
    second: 15,
    weekYear: 1,
    isoWeekYear: 1,
    week: 5,
    isoWeek: 5,
    year: 1,
};

export function getPrioritizedUnits(unitsObj) {
    var units = [],
        u;
    for (u in unitsObj) {
        if (hasOwnProp(unitsObj, u)) {
            units.push({ unit: u, priority: priorities[u] });
        }
    }
    units.sort(function (a, b) {
        return a.priority - b.priority;
    });
    return units;
}