add SecondMs and improve typing for validDateTime()

photostructure · Sep 30, 2023 · f2a6d7e · f2a6d7e
1 parent bb10b8c
commit f2a6d7e
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/src/DateTime.ts b/src/DateTime.ts
@@ -4,11 +4,12 @@ import { ExifDateTime } from "./ExifDateTime"
 import { ExifTime } from "./ExifTime"
 import { Maybe } from "./Maybe"
 
-export function validDateTime(dt: DateTime): boolean {
+export function validDateTime(dt: Maybe<DateTime>): dt is DateTime {
   return dt != null && dt.isValid
 }
 
-export const MinuteMs = 60 * 1000
+export const SecondMs = 1000
+export const MinuteMs = 60 * SecondMs
 export const HourMs = 60 * MinuteMs
 export const DayMs = 24 * HourMs