[ts] fix date validation to allow zero based hours, minutes and seconds

Author: mrhyde

README.md

@@ -39,8 +39,8 @@ npm install @2bad/onvif
 ```typescript
 import { Onvif } from '@2bad/onvif';
 
-// Connect to a camera
-const cam = new Onvif({
+// Connect to a device
+const device = new Onvif({
   hostname: '192.168.1.123',
   username: 'admin',
   password: 'password',

source/onvif.ts

@@ -259,29 +259,31 @@ export class Onvif extends EventEmitter {
 
     const dateTime = systemDateAndTime.UTCDateTime || systemDateAndTime.localDateTime
 
-    let time: Date
     if (!dateTime) {
       // Fallback to current time if dateTime is undefined
-      time = new Date()
-    } else {
-      const dt = linerase(dateTime) as DateTime
-      if (
-        !dt.date ||
-        !dt.time ||
-        !dt.date.year ||
-        !dt.date.month ||
-        !dt.date.day ||
-        !dt.time.hour ||
-        !dt.time.minute ||
-        !dt.time.second
-      ) {
-        throw new Error('Invalid date or time structure')
+      const time = new Date()
+      if (!this.timeShift) {
+        this.timeShift = time.getTime() - process.uptime() * 1000
       }
-      time = new Date(
-        Date.UTC(dt.date.year, dt.date.month - 1, dt.date.day, dt.time.hour, dt.time.minute, dt.time.second)
-      )
+      return time
+    }
+
+    const dt = linerase(dateTime) as DateTime
+    if (!dt.date?.year || !dt.date?.month || !dt.date?.day) {
+      throw new Error('Invalid date structure: year, month, and day are required')
     }
 
+    const time = new Date(
+      Date.UTC(
+        dt.date.year,
+        dt.date.month - 1,
+        dt.date.day,
+        dt.time?.hour ?? 0,
+        dt.time?.minute ?? 0,
+        dt.time?.second ?? 0
+      )
+    )
+
     if (!this.timeShift) {
       this.timeShift = time.getTime() - process.uptime() * 1000
     }