#204 Error management (#237)

* added error snackbar for api fails
* improved error page to be shown only for userdata errors and to allow retrying
* fixed test breaking only in local because of timezone and reduced warnings for easier reading of tests results
* added error management for failure inside calendars imports
* added error snackbar for api fails
* improved error page to be shown only for userdata errors and to allow retrying
* added error management for failure inside calendars imports

Co-authored-by: Camille Moussu <cmoussu@linagora.com>

__test__/components/Calendar.test.tsx

@@ -4,7 +4,7 @@ import * as eventThunks from "../../src/features/Calendars/CalendarSlice";
 import { renderWithProviders } from "../utils/Renderwithproviders";
 import { searchUsers } from "../../src/features/User/userAPI";
 import * as calendarThunks from "../../src/features/Calendars/CalendarSlice";
-import { useRef } from "react";
+import { act, useRef } from "react";
 
 import userEvent from "@testing-library/user-event";
 import CalendarLayout from "../../src/components/Calendar/CalendarLayout";
@@ -137,10 +137,12 @@ describe("CalendarSelection", () => {
   };
   it("renders calendars", async () => {
     const mockCalendarRef = { current: null };
-    renderWithProviders(
-      <CalendarApp calendarRef={mockCalendarRef} />,
-      preloadedState
-    );
+    await act(async () => {
+      renderWithProviders(
+        <CalendarApp calendarRef={mockCalendarRef} />,
+        preloadedState
+      );
+    });
     expect(screen.getByText("Personnal Calendars")).toBeInTheDocument();
     expect(screen.getByText("Delegated Calendars")).toBeInTheDocument();
     expect(screen.getByText("Other Calendars")).toBeInTheDocument();
@@ -149,12 +151,14 @@ describe("CalendarSelection", () => {
     expect(screen.getByLabelText("Calendar delegated")).toBeInTheDocument();
     expect(screen.getByLabelText("Calendar shared")).toBeInTheDocument();
   });
-  it("open accordeon when clicking on button only", () => {
+  it("open accordeon when clicking on button only", async () => {
     const mockCalendarRef = { current: null };
-    renderWithProviders(
-      <CalendarApp calendarRef={mockCalendarRef} />,
-      preloadedState
-    );
+    await act(async () => {
+      renderWithProviders(
+        <CalendarApp calendarRef={mockCalendarRef} />,
+        preloadedState
+      );
+    });
     expect(screen.getByText("Personnal Calendars")).toBeInTheDocument();
     expect(screen.getByText("Delegated Calendars")).toBeInTheDocument();
     expect(screen.getByText("Other Calendars")).toBeInTheDocument();
@@ -168,14 +172,20 @@ describe("CalendarSelection", () => {
       .closest(".MuiAccordionSummary-root");
 
     const addButton = screen.getAllByTestId("AddIcon")[2];
-    fireEvent.click(addButton);
+    await act(async () => {
+      fireEvent.click(addButton);
+    });
     expect(sharedAccordionSummary).toHaveAttribute("aria-expanded", "true");
 
-    fireEvent.click(addButton);
+    await act(async () => {
+      fireEvent.click(addButton);
+    });
     expect(sharedAccordionSummary).toHaveAttribute("aria-expanded", "true");
   });
-  it("BUGFIX: remove dots in mini calendar when unselecting personnal calendar", () => {
-    renderWithProviders(<CalendarLayout />, preloadedState);
+  it("BUGFIX: remove dots in mini calendar when unselecting personnal calendar", async () => {
+    await act(async () =>
+      renderWithProviders(<CalendarLayout />, preloadedState)
+    );
 
     const checkbox = screen.getByLabelText("Calendar personnal");
     // checkbox checked : events shown
@@ -186,8 +196,9 @@ describe("CalendarSelection", () => {
     ).toHaveClass("event-dot");
 
     // checkbox unchecked : events hidden
-    fireEvent.click(checkbox);
-
+    await act(async () => {
+      fireEvent.click(checkbox);
+    });
     expect(
       screen.getByTestId(
         `date-${start.getFullYear()}-${start.getMonth()}-${start.getDate()}`
@@ -195,18 +206,24 @@ describe("CalendarSelection", () => {
     ).not.toHaveClass("event-dot");
 
     // checkbox rechecked : events shown
-    fireEvent.click(checkbox);
+    await act(async () => {
+      fireEvent.click(checkbox);
+    });
     expect(
       screen.getByTestId(
         `date-${start.getFullYear()}-${start.getMonth()}-${start.getDate()}`
       )
     ).toHaveClass("event-dot");
   });
-  it("BUGFIX: remove dots in mini calendar when unselecting delegated calendar", () => {
-    renderWithProviders(<CalendarLayout />, preloadedState);
+  it("BUGFIX: remove dots in mini calendar when unselecting delegated calendar", async () => {
+    await act(async () =>
+      renderWithProviders(<CalendarLayout />, preloadedState)
+    );
 
     // hide personnal event first
-    fireEvent.click(screen.getByLabelText("Calendar personnal"));
+    await act(async () => {
+      fireEvent.click(screen.getByLabelText("Calendar personnal"));
+    });
     const checkbox = screen.getByLabelText("Calendar delegated");
 
     expect(
@@ -216,18 +233,24 @@ describe("CalendarSelection", () => {
     ).not.toHaveClass("event-dot");
 
     // checkbox checked : events shown
-    fireEvent.click(checkbox);
+    await act(async () => {
+      fireEvent.click(checkbox);
+    });
     expect(
       screen.getByTestId(
         `date-${start.getFullYear()}-${start.getMonth()}-${start.getDate()}`
       )
     ).toHaveClass("event-dot");
   });
-  it("BUGFIX: remove dots in mini calendar when unselecting shared calendar", () => {
-    renderWithProviders(<CalendarLayout />, preloadedState);
+  it("BUGFIX: remove dots in mini calendar when unselecting shared calendar", async () => {
+    await act(async () =>
+      renderWithProviders(<CalendarLayout />, preloadedState)
+    );
 
     // hide personnal event first
-    fireEvent.click(screen.getByLabelText("Calendar personnal"));
+    await act(async () => {
+      fireEvent.click(screen.getByLabelText("Calendar personnal"));
+    });
     const checkbox = screen.getByLabelText("Calendar shared");
 
     // checkbox unchecked : events hidden
@@ -238,7 +261,9 @@ describe("CalendarSelection", () => {
     ).not.toHaveClass("event-dot");
 
     // checkbox checked : events shown
-    fireEvent.click(checkbox);
+    await act(async () => {
+      fireEvent.click(checkbox);
+    });
     expect(
       screen.getByTestId(
         `date-${start.getFullYear()}-${start.getMonth()}-${start.getDate()}`
@@ -292,13 +317,18 @@ describe("calendar Availability search", () => {
       },
     ]);
 
-    renderWithProviders(<CalendarTestWrapper />, preloadedState);
+    await act(async () =>
+      renderWithProviders(<CalendarTestWrapper />, preloadedState)
+    );
 
     const input = screen.getByPlaceholderText(/start typing a name or email/i);
-    userEvent.type(input, "New");
-
+    act(() => {
+      userEvent.type(input, "New");
+    });
     const option = await screen.findByText("New User");
-    fireEvent.click(option);
+    await act(async () => {
+      fireEvent.click(option);
+    });
 
     expect(spy).toHaveBeenCalled();
   });
@@ -317,14 +347,17 @@ describe("calendar Availability search", () => {
       .mockImplementation((payload) => {
         return () => Promise.resolve(payload) as any;
       });
-    renderWithProviders(<CalendarTestWrapper />, preloadedState);
+    await act(async () =>
+      renderWithProviders(<CalendarTestWrapper />, preloadedState)
+    );
 
     const input = screen.getByPlaceholderText(/start typing a name or email/i);
-    userEvent.type(input, "Alice");
+    await act(async () => userEvent.type(input, "Alice"));
 
     const option = await screen.findByText("Alice");
-    fireEvent.click(option);
-
+    await act(async () => {
+      fireEvent.click(option);
+    });
     expect(spy).not.toHaveBeenCalledWith();
   });
 
@@ -343,18 +376,22 @@ describe("calendar Availability search", () => {
       },
     ]);
 
-    renderWithProviders(<CalendarTestWrapper />, preloadedState);
+    await act(async () =>
+      renderWithProviders(<CalendarTestWrapper />, preloadedState)
+    );
 
     const input = screen.getByPlaceholderText(/start typing a name or email/i);
-    userEvent.type(input, "New");
+    await act(async () => userEvent.type(input, "New"));
 
     const option = await screen.findByText("New User");
-    fireEvent.click(option);
 
+    await act(async () => {
+      fireEvent.click(option);
+    });
     expect(spy).toHaveBeenCalled();
-
-    fireEvent.click(screen.getByRole("button", { name: /create event/i }));
-
+    await act(async () => {
+      fireEvent.click(screen.getByRole("button", { name: /create event/i }));
+    });
     await waitFor(() => {
       expect(screen.getAllByText(/Create Event/i)).toHaveLength(2);
       expect(screen.getAllByText(/New User/i)).toHaveLength(2);
@@ -376,17 +413,21 @@ describe("calendar Availability search", () => {
       },
     ]);
 
-    renderWithProviders(<CalendarTestWrapper />, preloadedState);
+    await act(async () =>
+      renderWithProviders(<CalendarTestWrapper />, preloadedState)
+    );
 
     const input = screen.getByPlaceholderText(/start typing a name or email/i);
-    userEvent.type(input, "New");
+    await act(async () => userEvent.type(input, "New"));
 
     const option = await screen.findByText("New User");
-    fireEvent.click(option);
-
+    await act(async () => {
+      fireEvent.click(option);
+    });
     expect(spy).toHaveBeenCalled();
-
-    fireEvent.keyDown(input, { key: "Enter" });
+    await act(async () => {
+      fireEvent.keyDown(input, { key: "Enter" });
+    });
 
     await waitFor(() => {
       expect(screen.getAllByText(/Create Event/i)).toHaveLength(2);
@@ -394,14 +435,16 @@ describe("calendar Availability search", () => {
     });
   });
 
-  it("BUGFIX: can untoggle all personnal calendars", () => {
-    renderWithProviders(<CalendarTestWrapper />, {
-      user: preloadedState.user,
-      calendars: {
-        list: { "user1/cal1": preloadedState.calendars.list["user1/cal1"] },
-        pending: false,
-      },
-    });
+  it("BUGFIX: can untoggle all personnal calendars", async () => {
+    await act(async () =>
+      renderWithProviders(<CalendarTestWrapper />, {
+        user: preloadedState.user,
+        calendars: {
+          list: { "user1/cal1": preloadedState.calendars.list["user1/cal1"] },
+          pending: false,
+        },
+      })
+    );
 
     const checkbox = screen.getByLabelText("Calendar personnal");
     expect(checkbox).toBeChecked();
@@ -412,13 +455,15 @@ describe("calendar Availability search", () => {
   });
 
   it("BUGFIX: monthview doesn't show days numbers in banner", async () => {
-    renderWithProviders(<CalendarLayout />, {
-      user: preloadedState.user,
-      calendars: {
-        list: { "user1/cal1": preloadedState.calendars.list["user1/cal1"] },
-        pending: false,
-      },
-    });
+    await act(async () =>
+      renderWithProviders(<CalendarLayout />, {
+        user: preloadedState.user,
+        calendars: {
+          list: { "user1/cal1": preloadedState.calendars.list["user1/cal1"] },
+          pending: false,
+        },
+      })
+    );
 
     const calendarRef = (window as any).__calendarRef;
 
@@ -427,8 +472,9 @@ describe("calendar Availability search", () => {
     });
 
     const calendarApi = calendarRef.current;
-
-    calendarApi.changeView("dayGridMonth");
+    await act(async () => {
+      calendarApi.changeView("dayGridMonth");
+    });
     await waitFor(() => {
       expect(screen.queryAllByRole("columnheader").length).toBe(14);
     });
@@ -452,7 +498,9 @@ describe("calendar Availability search", () => {
         return () => Promise.resolve(payload) as any;
       });
     jest.useFakeTimers().setSystemTime(new Date("2025-01-01"));
-    renderWithProviders(<CalendarLayout />, preloadedState);
+    await act(async () =>
+      renderWithProviders(<CalendarLayout />, preloadedState)
+    );
 
     await waitFor(() => {
       expect(spy).toHaveBeenCalled();
@@ -461,9 +509,10 @@ describe("calendar Availability search", () => {
     const calendarRef = (window as any).__calendarRef;
     const calendarApi = calendarRef.current;
     const view = calendarApi?.view;
-    calendarApi.changeView("dayGridMonth");
-    fireEvent.click(screen.getByTestId("ChevronRightIcon"));
-
+    await act(async () => {
+      calendarApi.changeView("dayGridMonth");
+      fireEvent.click(screen.getByTestId("ChevronRightIcon"));
+    });
     expect(spy).toHaveBeenCalledTimes(4);
     const callArgs = spy.mock.calls[3][0];
     expect(callArgs.calId).toBe("user1/cal1");

__test__/components/MiniCalendarColor.test.tsx

@@ -1,10 +1,9 @@
 import { renderWithProviders } from "../utils/Renderwithproviders";
-import { fireEvent, screen, waitFor } from "@testing-library/react";
+import { screen } from "@testing-library/react";
 import { jest } from "@jest/globals";
 import CalendarApp from "../../src/components/Calendar/Calendar";
 import * as appHooks from "../../src/app/hooks";
 import { ThunkDispatch } from "@reduxjs/toolkit";
-import preview from "jest-preview";
 
 describe("MiniCalendar", () => {
   const day = new Date();

__test__/components/PeopleSearch.test.tsx

@@ -1,4 +1,4 @@
-import { screen, fireEvent, waitFor } from "@testing-library/react";
+import { screen, fireEvent, waitFor, act } from "@testing-library/react";
 import userEvent from "@testing-library/user-event";
 import {
   User,
@@ -51,7 +51,9 @@ describe("PeopleSearch", () => {
 
     const input = screen.getByRole("combobox");
     await userEvent.type(input, "Test");
-    jest.advanceTimersByTime(300);
+    await act(async () => {
+      jest.advanceTimersByTime(300);
+    });
 
     await waitFor(() => {
       expect(mockedSearchUsers).toHaveBeenCalledWith("Test", ["user"]);
@@ -64,7 +66,9 @@ describe("PeopleSearch", () => {
 
     const input = screen.getByRole("combobox");
     await userEvent.type(input, "Test");
-    jest.advanceTimersByTime(300);
+    await act(async () => {
+      jest.advanceTimersByTime(300);
+    });
 
     const option = await screen.findByText("Test User");
     await userEvent.click(option);
@@ -79,7 +83,9 @@ describe("PeopleSearch", () => {
     setup([baseUser]);
     const input = screen.getByRole("combobox");
     await userEvent.type(input, "Test");
-    jest.advanceTimersByTime(300);
+    await act(async () => {
+      jest.advanceTimersByTime(300);
+    });
 
     await waitFor(() => {
       expect(screen.queryByText("test@example.com")).not.toBeInTheDocument();

__test__/features/Calendars/TimezoneInGrid.test.tsx

@@ -37,11 +37,6 @@ describe("Calendar - Timezone Integration", () => {
       timeZone: "America/New_York",
       pending: false,
     },
-    events: {
-      selectedEvent: null,
-      isEditMode: false,
-      editModeDialogOpen: false,
-    },
   };
 
   beforeEach(() => {

__test__/features/Events/EventDisplay.test.tsx

@@ -104,6 +104,26 @@ describe("Event Preview Display", () => {
   };
 
   it("renders correctly event data", () => {
+    const originalToLocaleString = Date.prototype.toLocaleString;
+
+    jest.spyOn(Date.prototype, "toLocaleString").mockImplementation(function (
+      this: Date,
+      locales?: Intl.LocalesArgument,
+      options?: Intl.DateTimeFormatOptions
+    ) {
+      return originalToLocaleString.call(this, "en-US", options);
+    });
+    const originalToLocaleTimeString = Date.prototype.toLocaleTimeString;
+
+    jest
+      .spyOn(Date.prototype, "toLocaleTimeString")
+      .mockImplementation(function (
+        this: Date,
+        locales?: Intl.LocalesArgument,
+        options?: Intl.DateTimeFormatOptions
+      ) {
+        return originalToLocaleTimeString.call(this, "en-US", options);
+      });
     renderWithProviders(
       <EventPreviewModal
         open={true}

__test__/features/user/HandleLogin.test.tsx

@@ -73,9 +73,9 @@ describe("HandleLogin", () => {
 
     expect(screen.getByAltText("loading")).toBeInTheDocument();
   });
-  test("goes to error page when userData doesnt exists after loading and calendars pending is false", () => {
+  test("goes to error page when there is error in user data", () => {
     const dispatch = appHooks.useAppDispatch();
-    renderWithProviders(<HandleLogin />, { user: { loading: false } });
+    renderWithProviders(<HandleLogin />, { user: { error: true } });
     expect(dispatch).toHaveBeenCalledWith(push("/error"));
   });
 });

src/App.tsx

@@ -1,4 +1,4 @@
-import { Suspense } from "react";
+import { Suspense, useEffect } from "react";
 import { Route, Routes } from "react-router-dom";
 import { HistoryRouter as Router } from "redux-first-history/rr6";
 import { CallbackResume } from "./features/User/LoginCallback";
@@ -9,8 +9,18 @@ import HandleLogin from "./features/User/HandleLogin";
 import CalendarLayout from "./components/Calendar/CalendarLayout";
 import { Error } from "./components/Error/Error";
 import { CustomThemeProvider } from "./theme/ThemeProvider";
+import { useAppDispatch, useAppSelector } from "./app/hooks";
+import { push } from "redux-first-history";
+import { ErrorSnackbar } from "./components/Error/ErrorSnackbar";
 
 function App() {
+  const error = useAppSelector((state) => state.user.error);
+  const dispatch = useAppDispatch();
+  useEffect(() => {
+    if (error) {
+      dispatch(push("/error"));
+    }
+  });
   return (
     <CustomThemeProvider>
       <Suspense fallback={<Loading />}>
@@ -22,6 +32,8 @@ function App() {
             <Route path="/error" element={<Error />} />
           </Routes>
         </Router>
+        <ErrorSnackbar error={error} type="user" />
+        <ErrorSnackbar error={error} type="user" />
       </Suspense>
     </CustomThemeProvider>
   );

src/components/Attendees/AttendeeSearch.tsx

@@ -17,7 +17,7 @@ export default function UserSearch({
       displayName: a.cn ?? "",
       avatarUrl: "",
       openpaasId: "",
-    }))
+    })) ?? []
   );
   useEffect(() => {
     setSelectedUsers(

src/components/Calendar/CalendarLayout.tsx

@@ -5,10 +5,12 @@ import { useAppDispatch } from "../../app/hooks";
 import { getCalendarRange } from "../../utils/dateUtils";
 import { useAppSelector } from "../../app/hooks";
 import { refreshCalendars } from "../Event/utils/eventUtils";
+import { ErrorSnackbar } from "../Error/ErrorSnackbar";
 
 export default function CalendarLayout() {
   const calendarRef = useRef<any>(null);
   const dispatch = useAppDispatch();
+  const error = useAppSelector((state) => state.calendars.error);
   const selectedCalendars = useAppSelector((state) => state.calendars.list);
   const tempcalendars = useAppSelector((state) => state.calendars.templist);
   const [currentDate, setCurrentDate] = useState<Date>(new Date());
@@ -62,6 +64,7 @@ export default function CalendarLayout() {
         onDateChange={handleDateChange}
         onViewChange={handleViewChange}
       />
+      <ErrorSnackbar error={error} type="calendar" />
     </div>
   );
 }

src/components/Error/Error.tsx

@@ -1,3 +1,89 @@
+import ErrorOutlineIcon from "@mui/icons-material/ErrorOutline";
+import ReplayIcon from "@mui/icons-material/Replay";
+import { Box, Button, Fade, Paper, Stack, Typography } from "@mui/material";
+import { useEffect } from "react";
+import { push } from "redux-first-history";
+import { useAppDispatch, useAppSelector } from "../../app/hooks";
+
 export function Error() {
-  return <p>Error</p>;
+  const dispatch = useAppDispatch();
+  const userError = useAppSelector((state) => state.user.error);
+  const calendarError = useAppSelector((state) => state.calendars.error);
+
+  useEffect(() => {
+    if (!userError) {
+      dispatch(push("/"));
+    }
+  }, [calendarError, dispatch]);
+
+  const errorMessage = userError || calendarError || "Unknown error";
+
+  return (
+    <Fade in timeout={500}>
+      <Box
+        sx={{
+          minHeight: "100vh",
+          display: "flex",
+          alignItems: "center",
+          justifyContent: "center",
+          bgcolor: "background.default",
+          p: 3,
+        }}
+      >
+        <Paper
+          elevation={3}
+          sx={{
+            borderRadius: 4,
+            p: 6,
+            textAlign: "center",
+            maxWidth: 420,
+            width: "100%",
+          }}
+        >
+          <Stack spacing={2} alignItems="center">
+            <Box
+              sx={{
+                color: "error.main",
+                borderRadius: "50%",
+                width: 72,
+                height: 72,
+                display: "flex",
+                alignItems: "center",
+                justifyContent: "center",
+              }}
+            >
+              <ErrorOutlineIcon sx={{ fontSize: 40 }} />
+            </Box>
+
+            <Typography variant="h5" fontWeight={600}>
+              Something went wrong
+            </Typography>
+
+            <Typography variant="body1" color="text.secondary" sx={{ mb: 2 }}>
+              {errorMessage}
+            </Typography>
+
+            <Button
+              variant="contained"
+              color="error"
+              startIcon={<ReplayIcon />}
+              onClick={() => {
+                window.location.reload();
+              }}
+              sx={{
+                textTransform: "none",
+                fontWeight: 600,
+                borderRadius: 2,
+                px: 3,
+                py: 1,
+                boxShadow: "none",
+              }}
+            >
+              Try Again
+            </Button>
+          </Stack>
+        </Paper>
+      </Box>
+    </Fade>
+  );
 }

src/components/Error/ErrorSnackbar.tsx

@@ -1,13 +1,51 @@
 import Snackbar from "@mui/material/Snackbar";
 import Alert from "@mui/material/Alert";
 import Button from "@mui/material/Button";
+import { useAppDispatch } from "../../app/hooks";
+import { clearError as calendarClearError } from "../../features/Calendars/CalendarSlice";
+import { clearError as userClearError } from "../../features/User/userSlice";
 
-interface Props {
-  messages: string[];
-  onClose: () => void;
+export function ErrorSnackbar({
+  error,
+  type,
+}: {
+  error: string | null;
+  type: "user" | "calendar";
+}) {
+  const dispatch = useAppDispatch();
+  const handleCloseSnackbar = () => {
+    dispatch(type === "calendar" ? calendarClearError() : userClearError());
+  };
+
+  return (
+    <Snackbar
+      open={!!error}
+      onClose={handleCloseSnackbar}
+      anchorOrigin={{ vertical: "bottom", horizontal: "center" }}
+    >
+      <Alert
+        severity="error"
+        onClose={handleCloseSnackbar}
+        sx={{ width: "100%" }}
+        action={
+          <Button color="inherit" size="small" onClick={handleCloseSnackbar}>
+            OK
+          </Button>
+        }
+      >
+        {error}
+      </Alert>
+    </Snackbar>
+  );
 }
 
-export function EventErrorSnackbar({ messages, onClose }: Props) {
+export function EventErrorSnackbar({
+  messages,
+  onClose,
+}: {
+  messages: string[];
+  onClose: () => void;
+}) {
   const open = messages.length > 0;
   const summary =
     messages.length === 1

src/features/Events/EventApi.ts

@@ -14,24 +14,24 @@ export async function getEvent(event: CalendarEvent, isMaster?: boolean) {
   const eventData = await response.text();
 
   const eventical = ICAL.parse(eventData);
-
+  const vevents = (eventical[2] || []).filter(
+    ([name]: [string]) => name.toLowerCase() === "vevent"
+  );
   let targetVevent;
   if (isMaster) {
     // Find master VEVENT (the one without recurrence-id)
-    const vevents = eventical[2].filter(
-      ([name]: string[]) => name === "vevent"
-    );
+
     targetVevent = vevents.find(
       ([, props]: [string, any[]]) =>
         !props.find(([k]: string[]) => k.toLowerCase() === "recurrence-id")
     );
     if (!targetVevent) {
       // Fallback to first VEVENT if no master found
-      targetVevent = eventical[2][1];
+      targetVevent = vevents[0];
     }
   } else {
     // For non-master, use first VEVENT as before
-    targetVevent = eventical[2][1];
+    targetVevent = vevents[0];
   }
 
   const eventjson = parseCalendarEvent(

src/features/Events/EventDisplay.tsx

@@ -90,7 +90,7 @@ export default function EventDisplayModal({
   const [end, setEnd] = useState(
     formatLocalDateTime(new Date(event?.end ?? Date.now()))
   );
-  const [allday, setAllDay] = useState(event?.allday);
+  const [allday, setAllDay] = useState(event?.allday ?? false);
   const [repetition, setRepetition] = useState<RepetitionObject>(
     event?.repetition ?? ({} as RepetitionObject)
   );
@@ -280,7 +280,7 @@ export default function EventDisplayModal({
               fullWidth
               disabled={!isOwn}
               label="Title"
-              value={title}
+              value={title ?? ""}
               onChange={(e) => setTitle(e.target.value)}
               size="small"
               margin="dense"
@@ -366,7 +366,7 @@ export default function EventDisplayModal({
               <Select
                 disabled={!isOwn}
                 labelId="calendar-select-label"
-                value={calendarid.toString()}
+                value={calendarid.toString() ?? ""}
                 label="Calendar"
                 onChange={(e: SelectChangeEvent) => {
                   const newId = Number(e.target.value);

src/features/User/HandleLogin.tsx

@@ -47,10 +47,10 @@ export function HandleLogin() {
     initiateLogin();
   }, [userData, dispatch]);
   useEffect(() => {
-    if (!calendars.pending && !userData.loading) {
+    if (userData.error) {
       dispatch(push("/error"));
     }
-    if (!calendars.pending && !userData.loading) {
+    if (!calendars.pending && !userData.loading && !userData.error) {
       dispatch(push("/calendar"));
     }
   }, [calendars.pending, userData.loading]);

src/features/User/userSlice.ts

@@ -1,15 +1,23 @@
 import { createAsyncThunk, createSlice } from "@reduxjs/toolkit";
 import { userData, userOrganiser } from "./userDataTypes";
 import { getOpenPaasUser } from "./userAPI";
+import { formatReduxError } from "../../utils/errorUtils";
 
-export const getOpenPaasUserDataAsync = createAsyncThunk<any>(
-  "user/getOpenPaasUserData",
-  async () => {
+export const getOpenPaasUserDataAsync = createAsyncThunk<
+  Record<string, string>,
+  void,
+  { rejectValue: { message: string; status?: number } }
+>("user/getOpenPaasUserData", async (_, { rejectWithValue }) => {
+  try {
     const user = (await getOpenPaasUser()) as Record<string, string>;
-
     return user;
+  } catch (err: any) {
+    return rejectWithValue({
+      message: formatReduxError(err),
+      status: err.response?.status,
+    });
   }
-);
+});
 
 export const userSlice = createSlice({
   name: "user",
@@ -18,6 +26,7 @@ export const userSlice = createSlice({
     organiserData: null as unknown as userOrganiser,
     tokens: null as unknown as Record<string, string>,
     loading: true,
+    error: null as unknown as string | null,
   },
   reducers: {
     setUserData: (state, action) => {
@@ -32,6 +41,9 @@ export const userSlice = createSlice({
     setTokens: (state, action) => {
       state.tokens = action.payload;
     },
+    clearError: (state) => {
+      state.error = null;
+    },
   },
   extraReducers: (builder) => {
     builder
@@ -54,13 +66,17 @@ export const userSlice = createSlice({
       .addCase(getOpenPaasUserDataAsync.pending, (state) => {
         state.loading = true;
       })
-      .addCase(getOpenPaasUserDataAsync.rejected, (state) => {
-        state.loading = false;
+      .addCase(getOpenPaasUserDataAsync.rejected, (state, action) => {
+        if (action.payload?.status !== 401) {
+          state.loading = false;
+          state.error =
+            action.payload?.message || "Failed to fetch user information";
+        }
       });
   },
 });
 
 // Action creators are generated for each case reducer function
-export const { setUserData, setTokens } = userSlice.actions;
+export const { setUserData, setTokens, clearError } = userSlice.actions;
 
 export default userSlice.reducer;

src/utils/errorUtils.ts

@@ -0,0 +1,9 @@
+export function formatReduxError(error: unknown): string {
+  if (!error) return "Unknown error";
+  if (typeof error === "string") return error;
+  if (typeof error === "object") {
+    const err = error as any;
+    if (err?.message) return err.message;
+  }
+  return "Unexpected error occurred";
+}