import { hooks } from ‘../utils/hooks’; import hasOwnProp from ‘../utils/has-own-prop’;

// Plugins that add properties should also add the key here (null value), // so we can properly clone ourselves. var momentProperties = hooks.momentProperties = [];

export function copyConfig(to, from) {

var i, prop, val;

if (typeof from._isAMomentObject !== 'undefined') {
    to._isAMomentObject = from._isAMomentObject;
}
if (typeof from._i !== 'undefined') {
    to._i = from._i;
}
if (typeof from._f !== 'undefined') {
    to._f = from._f;
}
if (typeof from._l !== 'undefined') {
    to._l = from._l;
}
if (typeof from._strict !== 'undefined') {
    to._strict = from._strict;
}
if (typeof from._tzm !== 'undefined') {
    to._tzm = from._tzm;
}
if (typeof from._isUTC !== 'undefined') {
    to._isUTC = from._isUTC;
}
if (typeof from._offset !== 'undefined') {
    to._offset = from._offset;
}
if (typeof from._pf !== 'undefined') {
    to._pf = from._pf;
}
if (typeof from._locale !== 'undefined') {
    to._locale = from._locale;
}

if (momentProperties.length > 0) {
    for (i in momentProperties) {
        prop = momentProperties[i];
        val = from[prop];
        if (typeof val !== 'undefined') {
            to[prop] = val;
        }
    }
}

return to;

}

var updateInProgress = false;

// Moment prototype object export function Moment(config) {

copyConfig(this, config);
this._d = new Date(+config._d);
// Prevent infinite loop in case updateOffset creates new moment
// objects.
if (updateInProgress === false) {
    updateInProgress = true;
    hooks.updateOffset(this);
    updateInProgress = false;
}

}

export function isMoment (obj) {

return obj instanceof Moment || (obj != null && hasOwnProp(obj, '_isAMomentObject'));

}