1import hasOwnProp from '../utils/has-own-prop';
2
3var aliases = {};
4
5export function addUnitAlias(unit, shorthand) {
6    var lowerCase = unit.toLowerCase();
7    aliases[lowerCase] = aliases[lowerCase + 's'] = aliases[shorthand] = unit;
8}
9
10export function normalizeUnits(units) {
11    return typeof units === 'string'
12        ? aliases[units] || aliases[units.toLowerCase()]
13        : undefined;
14}
15
16export function normalizeObjectUnits(inputObject) {
17    var normalizedInput = {},
18        normalizedProp,
19        prop;
20
21    for (prop in inputObject) {
22        if (hasOwnProp(inputObject, prop)) {
23            normalizedProp = normalizeUnits(prop);
24            if (normalizedProp) {
25                normalizedInput[normalizedProp] = inputObject[prop];
26            }
27        }
28    }
29
30    return normalizedInput;
31}