chore: remove cron schedule from quiet hours schedule page (#10187)

site/src/pages/UserSettingsPage/SchedulePage/ScheduleForm.tsx

@@ -14,7 +14,7 @@ import MenuItem from "@mui/material/MenuItem";
 import { Stack } from "components/Stack/Stack";
 import { timeZones, getPreferredTimezone } from "utils/timeZones";
 import { Alert } from "components/Alert/Alert";
-import { timeToCron, quietHoursDisplay } from "utils/schedule";
+import { timeToCron, quietHoursDisplay, validTime } from "utils/schedule";
 
 export interface ScheduleFormValues {
   time: string;
@@ -25,7 +25,7 @@ const validationSchema = Yup.object({
   time: Yup.string()
     .ensure()
     .test("is-time-string", "Time must be in HH:mm format.", (value) => {
-      if (!/^[0-9][0-9]:[0-9][0-9]$/.test(value)) {
+      if (!validTime(value)) {
         return false;
       }
       const parts = value.split(":");
@@ -116,13 +116,6 @@ export const ScheduleForm: FC<React.PropsWithChildren<ScheduleFormProps>> = ({
           </TextField>
         </Stack>
 
-        <TextField
-          disabled
-          fullWidth
-          label="Cron schedule"
-          value={timeToCron(form.values.time, form.values.timezone)}
-        />
-
         <TextField
           disabled
           fullWidth

site/src/pages/UserSettingsPage/SchedulePage/SchedulePage.test.tsx

@@ -86,12 +86,8 @@ describe("SchedulePage", () => {
           ),
         );
 
-        const expectedCronSchedule = `CRON_TZ=${test.timezone} ${test.minute} ${test.hour} * * *`;
         renderWithAuth(<SchedulePage />);
         await fillForm(test);
-        const cron = screen.getByLabelText("Cron schedule");
-        expect(cron.getAttribute("value")).toEqual(expectedCronSchedule);
-
         await submitForm();
         const successMessage = await screen.findByText(
           "Schedule updated successfully",

site/src/utils/schedule.ts

@@ -156,7 +156,14 @@ export const getMaxDeadlineChange = (
   extremeDeadline: dayjs.Dayjs,
 ): number => Math.abs(deadline.diff(extremeDeadline, "hours"));
 
+export const validTime = (time: string): boolean => {
+  return /^[0-9][0-9]:[0-9][0-9]$/.test(time);
+};
+
 export const timeToCron = (time: string, tz?: string) => {
+  if (!validTime(time)) {
+    throw new Error(`Invalid time: ${time}`);
+  }
   const [HH, mm] = time.split(":");
   let prefix = "";
   if (tz) {
@@ -170,6 +177,10 @@ export const quietHoursDisplay = (
   tz: string,
   now: Date | undefined,
 ): string => {
+  if (!validTime(time)) {
+    return "Invalid time";
+  }
+
   // The cron-parser package doesn't accept a timezone in the cron string, but
   // accepts it as an option.
   const cron = timeToCron(time);