fix parsing of cron pattern

in some old instances, we had "00 00  * * *" (note double space
and only 5 components).

dashboard/src/components/SystemUpdate.vue

@@ -15,32 +15,13 @@ import AppsModel from '../models/AppsModel.js';
 import UpdaterModel from '../models/UpdaterModel.js';
 import TasksModel from '../models/TasksModel.js';
 import DashboardModel from '../models/DashboardModel.js';
-import { cronDays, cronHours } from '../utils.js';
+import { cronDays, cronHours, prettySchedule, parseSchedule } from '../utils.js';
 
 const appsModel = AppsModel.create();
 const tasksModel = TasksModel.create();
 const updaterModel = UpdaterModel.create();
 const dashboardModel = DashboardModel.create();
 
-function prettyAutoUpdateSchedule(pattern) {
-  if (!pattern) return '';
-  const tmp = pattern.split(' ');
-
-  if (tmp.length === 1) return tmp[0];
-
-  const hours = tmp[2].split(',');
-  const days = tmp[5].split(',');
-  const prettyDay = (days.length === 7 || days[0] === '*') ? 'Every day' : days.map((day) => { return cronDays[parseInt(day, 10)].name.substr(0, 3); }).join(', ');
-
-  try {
-    const prettyHour = hours.map((hour) => { return cronHours[parseInt(hour, 10)]; }).sort((a,b) => a.value - b.value).map(h => h.name).join(', ');
-    return prettyDay + ' at ' + prettyHour;
-  } catch (error) {
-    console.error('Unable to build pattern.', error);
-    return 'Custom pattern';
-  }
-}
-
 const inputDialog = useTemplateRef('inputDialog');
 const updateDialog = useTemplateRef('updateDialog');
 
@@ -106,19 +87,13 @@ async function refreshPendingUpdateInfo() {
 }
 
 function onShowConfigure() {
-  configureType.value = configurePattern.value === 'never' ? 'never' : 'pattern';
-
-  const tmp = currentPattern.value.split(' ');
-  const hours = tmp[2] ? tmp[2].split(',') : [];
-  const days = tmp[5] ? tmp[5].split(',') : [];
-
-  if (days[0] === '*') configureDays.value = cronDays.map(day => { return day.id; });
-  else configureDays.value = days.map(day => { return parseInt(day, 10); });
-
-  try {
-    configureHours.value = hours.map(hour => { return parseInt(hour, 10); });
-  } catch (error) {
-    console.error('Error parsing hour', error);
+  if (currentPattern.value === 'never') {
+    configureType.value = 'never';
+  } else {
+    configureType.value = 'pattern';
+    const result = parseSchedule(currentPattern.value);
+    configureDays.value = result.days; // Array of cronDays.id
+    configureHours.value = result.hours; // Array of cronHours.id
   }
 
   configureDialog.value.open();
@@ -347,7 +322,7 @@ onMounted(async () => {
       <SettingsItem v-if="ready">
         <div>
           <label>{{ $t('settings.updates.schedule') }}</label>
-          <span v-if="currentPattern !== 'never'">{{ prettyAutoUpdateSchedule(currentPattern) || '-' }}</span>
+          <span v-if="currentPattern !== 'never'">{{ prettySchedule(currentPattern) }}</span>
           <span v-else>{{ $t('settings.updates.disabled') }}</span>
         </div>
         <div style="display: flex; align-items: center">