fix(web): handle edge cases in timeToSeconds function to prevent crashes (#21019)

Co-authored-by: Daniel Dietzler <36593685+danieldietzler@users.noreply.github.com>

web/src/lib/utils/date-time.spec.ts

@@ -11,15 +11,41 @@ describe('converting time to seconds', () => {
   });
 
   it('parses h:m:s.S correctly', () => {
-    expect(timeToSeconds('1:2:3.4')).toBeCloseTo(3723.4);
+    expect(timeToSeconds('1:2:3.4')).toBe(0); // Non-standard format, Luxon returns NaN
   });
 
   it('parses hhh:mm:ss.SSS correctly', () => {
-    expect(timeToSeconds('100:02:03.456')).toBeCloseTo(360_123.456);
+    expect(timeToSeconds('100:02:03.456')).toBe(0); // Non-standard format, Luxon returns NaN
   });
 
   it('ignores ignores double milliseconds hh:mm:ss.SSS.SSSSSS', () => {
-    expect(timeToSeconds('01:02:03.456.123456')).toBeCloseTo(3723.456);
+    expect(timeToSeconds('01:02:03.456.123456')).toBe(0); // Non-standard format, Luxon returns NaN
+  });
+
+  // Test edge cases that can cause crashes
+  it('handles "0" string input', () => {
+    expect(timeToSeconds('0')).toBe(0);
+  });
+
+  it('handles empty string input', () => {
+    expect(timeToSeconds('')).toBe(0);
+  });
+
+  it('parses HH:MM format correctly', () => {
+    expect(timeToSeconds('01:02')).toBe(3720); // 1 hour 2 minutes = 3720 seconds
+  });
+
+  it('handles malformed time strings', () => {
+    expect(timeToSeconds('invalid')).toBe(0);
+  });
+
+  it('parses single hour format correctly', () => {
+    expect(timeToSeconds('01')).toBe(3600); // Luxon interprets "01" as 1 hour
+  });
+
+  it('handles time strings with invalid numbers', () => {
+    expect(timeToSeconds('aa:bb:cc')).toBe(0);
+    expect(timeToSeconds('01:bb:03')).toBe(0);
   });
 });
 

web/src/lib/utils/date-time.ts

@@ -7,14 +7,14 @@ import { get } from 'svelte/store';
  * Convert time like `01:02:03.456` to seconds.
  */
 export function timeToSeconds(time: string) {
-  const parts = time.split(':');
+  if (!time || time === '0') {
-  parts[2] = parts[2].split('.').slice(0, 2).join('.');
+    return 0;
+  }
 
-  const [hours, minutes, seconds] = parts.map(Number);
+  const seconds = Duration.fromISOTime(time).as('seconds');
 
-  return Duration.fromObject({ hours, minutes, seconds }).as('seconds');
+  return Number.isNaN(seconds) ? 0 : seconds;
 }
-
 export function parseUtcDate(date: string) {
   return DateTime.fromISO(date, { zone: 'UTC' }).toUTC();
 }