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

var priorities = {};

export function addUnitPriority(unit, priority) {
    priorities[unit] = priority;
}

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;
}