ui: fix: timezone handling

Author: yottahmd

ui/src/App.tsx

@@ -9,21 +9,17 @@ import { SWRConfig } from 'swr';
 import fetchJson from './lib/fetchJson';
 import Search from './pages/search';
 import { UserPreferencesProvider } from './contexts/UserPreference';
-
-export type Config = {
-  apiURL: string;
-  title: string;
-  navbarColor: string;
-  tz: string;
-  version: string;
-};
+import { Config, ConfigContext } from './contexts/ConfigContext';
+import moment from 'moment-timezone';
 
 type Props = {
   config: Config;
 };
 
 function App({ config }: Props) {
   const [title, setTitle] = React.useState<string>('');
+  config.tz ||= moment.tz.guess();
+
   return (
     <SWRConfig
       value={{
@@ -39,20 +35,22 @@ function App({ config }: Props) {
           setTitle,
         }}
       >
-        <UserPreferencesProvider>
-          <BrowserRouter>
-            <Layout {...config}>
-              <Routes>
-                <Route path="/" element={<Dashboard />} />
-                <Route path="/dashboard" element={<Dashboard />} />
-                <Route path="/dags/" element={<DAGs />} />
-                <Route path="/dags/:name/:tab" element={<DAGDetails />} />
-                <Route path="/dags/:name/" element={<DAGDetails />} />
-                <Route path="/search/" element={<Search />} />
-              </Routes>
-            </Layout>
-          </BrowserRouter>
-        </UserPreferencesProvider>
+        <ConfigContext.Provider value={config}>
+          <UserPreferencesProvider>
+            <BrowserRouter>
+              <Layout {...config}>
+                <Routes>
+                  <Route path="/" element={<Dashboard />} />
+                  <Route path="/dashboard" element={<Dashboard />} />
+                  <Route path="/dags/" element={<DAGs />} />
+                  <Route path="/dags/:name/:tab" element={<DAGDetails />} />
+                  <Route path="/dags/:name/" element={<DAGDetails />} />
+                  <Route path="/search/" element={<Search />} />
+                </Routes>
+              </Layout>
+            </BrowserRouter>
+          </UserPreferencesProvider>
+        </ConfigContext.Provider>
       </AppBarContext.Provider>
     </SWRConfig>
   );

ui/src/components/molecules/DAGTable.tsx

@@ -44,10 +44,10 @@ import {
   KeyboardArrowUp,
 } from '@mui/icons-material';
 import LiveSwitch from './LiveSwitch';
-import moment from 'moment';
 import 'moment-duration-format';
 import Ticker from '../atoms/Ticker';
 import VisuallyHidden from '../atoms/VisuallyHidden';
+import moment from 'moment-timezone';
 
 type Props = {
   DAGs: DAGItem[];
@@ -251,9 +251,7 @@ const defaultColumns = [
   }),
   columnHelper.accessor('Type', {
     id: 'Schedule',
-    header: getConfig().tz
-      ? `Schedule in ${getConfig().tz}`
-      : 'Schedule',
+    header: `Schedule in ${getConfig().tz || moment.tz.guess()}`,
     enableSorting: true,
     cell: (props) => {
       const data = props.row.original!;

ui/src/components/molecules/DashboardTimechart.tsx

@@ -6,6 +6,7 @@ import 'vis-timeline/styles/vis-timeline-graph2d.css';
 import { statusColorMapping } from '../../consts';
 import { DAGStatus } from '../../models';
 import { WorkflowListItem } from '../../models/api';
+import { useConfig } from '../../contexts/ConfigContext';
 
 type Props = { data: DAGStatus[] | WorkflowListItem[] };
 
@@ -21,15 +22,11 @@ type TimelineItem = {
 function DashboardTimechart({ data: input }: Props) {
   const timelineRef = useRef<HTMLDivElement>(null);
   const timelineInstance = useRef<Timeline | null>(null);
+  const config = useConfig();
 
   useEffect(() => {
     if (!timelineRef.current) return;
 
-    let timezone = getConfig().tz;
-    if (!timezone) {
-      timezone = moment.tz.guess();
-    }
-
     const items: TimelineItem[] = [];
     const now = moment();
     const startOfDay = moment().startOf('day');
@@ -47,8 +44,8 @@ function DashboardTimechart({ data: input }: Props) {
         items.push({
           id: status.Name + `_${status.RequestId}`,
           content: status.Name,
-          start: startMoment.tz(timezone).toDate(),
-          end: end.tz(timezone).toDate(),
+          start: startMoment.tz(config.tz).toDate(),
+          end: end.tz(config.tz).toDate(),
           group: 'main',
           className: `status-${status.Status}`,
         });
@@ -59,7 +56,7 @@ function DashboardTimechart({ data: input }: Props) {
 
     if (!timelineInstance.current) {
       timelineInstance.current = new Timeline(timelineRef.current, dataset, {
-        moment: (date: MomentInput) => moment(date).tz(timezone),
+        moment: (date: MomentInput) => moment(date).tz(config.tz),
         start: startOfDay.toDate(),
         end: now.endOf('day').toDate(),
         orientation: 'top',
@@ -76,7 +73,7 @@ function DashboardTimechart({ data: input }: Props) {
             hour: 'HH:mm',
           },
           majorLabels: {
-            hour: 'HH:mm',
+            hour: 'ddd D MMMM',
             day: 'ddd D MMMM',
           },
         },

ui/src/contexts/ConfigContext.tsx

@@ -0,0 +1,15 @@
+import { createContext, useContext } from 'react';
+
+export type Config = {
+  apiURL: string;
+  title: string;
+  navbarColor: string;
+  tz: string;
+  version: string;
+};
+
+export const ConfigContext = createContext<Config>(null!);
+
+export function useConfig() {
+  return useContext(ConfigContext);
+}

ui/src/index.tsx

@@ -1,7 +1,7 @@
 import React from 'react';
 import { createRoot } from 'react-dom/client';
 
-import App, { Config } from './App';
+import App from './App';
 import './styles/styles.css';
 import './styles/prism.css';
 
@@ -14,6 +14,7 @@ import '@fontsource/roboto/300.css';
 import '@fontsource/roboto/400.css';
 import '@fontsource/roboto/500.css';
 import '@fontsource/roboto/700.css';
+import { Config } from './contexts/ConfigContext';
 
 declare global {
   const getConfig: () => Config;

ui/src/models/index.ts

@@ -1,4 +1,5 @@
 import cronParser from 'cron-parser';
+import moment from 'moment-timezone';
 import { WorkflowListItem } from './api';
 
 export enum SchedulerStatus {
@@ -150,7 +151,7 @@ export function getNextSchedule(data: WorkflowListItem): number {
   if (!schedules || schedules.length == 0 || data.Suspended) {
     return Number.MAX_SAFE_INTEGER;
   }
-  const tz = getConfig().tz;
+  const tz = getConfig().tz || moment.tz.guess();
   const datesToRun = schedules.map((s) => {
     const expression = tz
       ? cronParser.parseExpression(s.Expression, {

ui/src/pages/index.tsx

@@ -8,6 +8,7 @@ import DashboardTimechart from '../components/molecules/DashboardTimechart';
 import Title from '../components/atoms/Title';
 import { AppBarContext } from '../contexts/AppBarContext';
 import useSWR from 'swr';
+import { useConfig } from '../contexts/ConfigContext';
 
 type metrics = Record<SchedulerStatus, number>;
 
@@ -25,6 +26,7 @@ function Dashboard() {
   const { data } = useSWR<ListWorkflowsResponse>(`/dags`, null, {
     refreshInterval: 10000,
   });
+  const config = useConfig();
 
   React.useEffect(() => {
     if (!data) {
@@ -79,7 +81,7 @@ function Dashboard() {
             height: '100%',
           }}
         >
-          <Title>{getConfig().tz ? `Timeline in ${getConfig().tz}` : "Timeline"}</Title>
+          <Title>{`Timeline in ${config.tz}`}</Title>
           <DashboardTimechart data={data?.DAGs || []} />
         </Box>
       </Grid>