1import extend from '../utils/extend';
2import { createUTC } from './utc';
3import getParsingFlags from '../create/parsing-flags';
4import some from '../utils/some';
5
6export function isValid(m) {
7    if (m._isValid == null) {
8        var flags = getParsingFlags(m),
9            parsedParts = some.call(flags.parsedDateParts, function (i) {
10                return i != null;
11            }),
12            isNowValid =
13                !isNaN(m._d.getTime()) &&
14                flags.overflow < 0 &&
15                !flags.empty &&
16                !flags.invalidEra &&
17                !flags.invalidMonth &&
18                !flags.invalidWeekday &&
19                !flags.weekdayMismatch &&
20                !flags.nullInput &&
21                !flags.invalidFormat &&
22                !flags.userInvalidated &&
23                (!flags.meridiem || (flags.meridiem && parsedParts));
24
25        if (m._strict) {
26            isNowValid =
27                isNowValid &&
28                flags.charsLeftOver === 0 &&
29                flags.unusedTokens.length === 0 &&
30                flags.bigHour === undefined;
31        }
32
33        if (Object.isFrozen == null || !Object.isFrozen(m)) {
34            m._isValid = isNowValid;
35        } else {
36            return isNowValid;
37        }
38    }
39    return m._isValid;
40}
41
42export function createInvalid(flags) {
43    var m = createUTC(NaN);
44    if (flags != null) {
45        extend(getParsingFlags(m), flags);
46    } else {
47        getParsingFlags(m).userInvalidated = true;
48    }
49
50    return m;
51}