From 72a9d0ee05ad4516517d3fc5aee786cf5d14f5c6 Mon Sep 17 00:00:00 2001
From: Camille Moussu <66134347+Eriikah@users.noreply.github.com>
Date: Mon, 2 Mar 2026 09:34:45 +0100
Subject: [PATCH] [#527] calendar delegation CRUD (#581)

* [#527] added panel to grant right for calendar delegation

* [#527] added rights management to access modal

* [#527] conditionnal rendering of access granting based on rights

* [#527] saves on close except cancel

* [#527] added tests
---
 .../Calendars/CalendarAccessRights.test.tsx   | 426 ++++++++++++++++++
 .../features/Calendars/CalendarModal.test.tsx |  86 ++--
 src/components/Calendar/AccessTab.tsx         |  41 +-
 .../Calendar/CalendarAccessRights.tsx         | 354 +++++++++++++++
 src/components/Calendar/CalendarModal.tsx     | 136 +++++-
 src/features/Calendars/CalendarTypes.ts       |  10 +
 .../Calendars/api/updateDelegationCalendar.ts |  17 +
 .../services/getCalendarsListAsync.ts         |  17 +-
 .../services/updateDelegationCalendarAsync.ts |  33 ++
 src/locales/en.json                           |   6 +
 src/utils/accessRightToDavProp.tsx            |  16 +
 11 files changed, 1073 insertions(+), 69 deletions(-)
 create mode 100644 __test__/features/Calendars/CalendarAccessRights.test.tsx
 create mode 100644 src/components/Calendar/CalendarAccessRights.tsx
 create mode 100644 src/features/Calendars/api/updateDelegationCalendar.ts
 create mode 100644 src/features/Calendars/services/updateDelegationCalendarAsync.ts
 create mode 100644 src/utils/accessRightToDavProp.tsx

diff --git a/__test__/features/Calendars/CalendarAccessRights.test.tsx b/__test__/features/Calendars/CalendarAccessRights.test.tsx
new file mode 100644
index 0000000..dcee911
--- /dev/null
+++ b/__test__/features/Calendars/CalendarAccessRights.test.tsx
@@ -0,0 +1,426 @@
+import { AccessTab } from "@/components/Calendar/AccessTab";
+import {
+  CalendarAccessRights,
+  UserWithAccess,
+} from "@/components/Calendar/CalendarAccessRights";
+import CalendarPopover from "@/components/Calendar/CalendarModal";
+import { updateDelegationCalendar } from "@/features/Calendars/api/updateDelegationCalendar";
+import { AccessRight, Calendar } from "@/features/Calendars/CalendarTypes";
+import * as eventThunks from "@/features/Calendars/services";
+import * as delegationThunks from "@/features/Calendars/services/updateDelegationCalendarAsync";
+import { getUserDetails } from "@/features/User/userAPI";
+import { accessRightToDavProp } from "@/utils/accessRightToDavProp";
+import { api } from "@/utils/apiUtils";
+import { fireEvent, screen, waitFor } from "@testing-library/react";
+import { renderWithProviders } from "../../utils/Renderwithproviders";
+
+jest.mock("@/utils/apiUtils", () => ({
+  api: { post: jest.fn() },
+}));
+
+jest.mock("@/features/User/userAPI", () => ({
+  getUserDetails: jest.fn(),
+}));
+
+jest.mock("@/features/Calendars/CalendarApi", () => ({
+  getSecretLink: jest.fn().mockReturnValue(""),
+  exportCalendar: jest.fn(),
+}));
+
+const mockThunkWithUnwrap = (resolvedValue: unknown = {}) =>
+  jest.fn().mockImplementation(() => {
+    const result = Object.assign(Promise.resolve(resolvedValue), {
+      unwrap: () => Promise.resolve(resolvedValue),
+    });
+    return jest.fn().mockReturnValue(result);
+  });
+
+describe("accessRightToDavProp", () => {
+  it("maps 5 (ADMIN) → dav:administration", () => {
+    expect(accessRightToDavProp(5)).toBe("dav:administration");
+  });
+
+  it("maps 3 (EDITOR) → dav:read-write", () => {
+    expect(accessRightToDavProp(3)).toBe("dav:read-write");
+  });
+
+  it("maps 2 (VIEW) → dav:read", () => {
+    expect(accessRightToDavProp(2)).toBe("dav:read");
+  });
+
+  it("defaults to dav:read for unknown values (covered by default case)", () => {
+    expect(accessRightToDavProp(999 as AccessRight)).toBe("dav:read");
+  });
+});
+
+describe("updateDelegationCalendar", () => {
+  beforeEach(() => jest.clearAllMocks());
+
+  it("posts to the correct DAV endpoint with the share body", async () => {
+    (api.post as jest.Mock).mockResolvedValue({ ok: true });
+
+    const share = {
+      set: [{ "dav:href": "mailto:alice@example.com", "dav:read": true }],
+      remove: [],
+    };
+
+    await updateDelegationCalendar("/calendars/user/cal1.json", share);
+
+    await waitFor(() =>
+      expect(api.post).toHaveBeenCalledWith(
+        "dav/calendars/user/cal1.json",
+        expect.objectContaining({
+          body: JSON.stringify({ share }),
+        })
+      )
+    );
+  });
+});
+
+const baseCalendar: Calendar = {
+  id: "user1/cal1",
+  name: "My Calendar",
+  description: "",
+  color: { color: "#0062FF", dark: "#FFF" },
+  link: "/calendars/user1/cal1.json",
+  visibility: "public",
+  events: {},
+  invite: [],
+  owner: { emails: ["user1@example.com"] },
+};
+
+describe("CalendarAccessRights", () => {
+  const mockOnChange = jest.fn();
+  const mockOnInvitesLoaded = jest.fn();
+
+  beforeEach(() => jest.clearAllMocks());
+
+  it("renders the grant access rights section", () => {
+    renderWithProviders(
+      <CalendarAccessRights
+        calendar={baseCalendar}
+        value={[]}
+        onChange={mockOnChange}
+        onInvitesLoaded={mockOnInvitesLoaded}
+      />
+    );
+
+    expect(
+      screen.getByText("calendarPopover.access.grantAccessRights")
+    ).toBeInTheDocument();
+  });
+
+  it("shows a list of users already passed in via value prop", () => {
+    const users: UserWithAccess[] = [
+      {
+        openpaasId: "abc",
+        displayName: "Alice",
+        email: "alice@example.com",
+        accessRight: 2,
+      },
+    ];
+
+    renderWithProviders(
+      <CalendarAccessRights
+        calendar={baseCalendar}
+        value={users}
+        onChange={mockOnChange}
+        onInvitesLoaded={mockOnInvitesLoaded}
+      />
+    );
+
+    expect(screen.getByText("Alice")).toBeInTheDocument();
+    expect(screen.getByText("alice@example.com")).toBeInTheDocument();
+  });
+
+  it("calls onChange with user removed when remove button is clicked", () => {
+    const users: UserWithAccess[] = [
+      {
+        openpaasId: "abc",
+        displayName: "Alice",
+        email: "alice@example.com",
+        accessRight: 2,
+      },
+    ];
+
+    renderWithProviders(
+      <CalendarAccessRights
+        calendar={baseCalendar}
+        value={users}
+        onChange={mockOnChange}
+        onInvitesLoaded={mockOnInvitesLoaded}
+      />
+    );
+
+    fireEvent.click(screen.getByLabelText(/remove/i));
+    expect(mockOnChange).toHaveBeenCalledWith([]);
+  });
+
+  it("loads invited users from calendar.invite on mount", async () => {
+    const calendarWithInvite: Calendar = {
+      ...baseCalendar,
+      invite: [
+        {
+          href: "mailto:bob@example.com",
+          principal: "/principals/users/bob123",
+          access: 3,
+          inviteStatus: 1,
+        },
+      ],
+    };
+
+    (getUserDetails as jest.Mock).mockResolvedValue({
+      preferredEmail: "bob@example.com",
+      firstname: "Bob",
+      lastname: "Smith",
+      emails: ["bob@example.com"],
+    });
+
+    renderWithProviders(
+      <CalendarAccessRights
+        calendar={calendarWithInvite}
+        value={[]}
+        onChange={mockOnChange}
+        onInvitesLoaded={mockOnInvitesLoaded}
+      />
+    );
+
+    await waitFor(() => expect(getUserDetails).toHaveBeenCalledWith("bob123"));
+    await waitFor(() =>
+      expect(mockOnInvitesLoaded).toHaveBeenCalledWith(
+        expect.arrayContaining([
+          expect.objectContaining({
+            email: "bob@example.com",
+            accessRight: 3,
+          }),
+        ])
+      )
+    );
+  });
+
+  it("skips invite entries where getUserDetails throws", async () => {
+    const calendarWithInvite: Calendar = {
+      ...baseCalendar,
+      invite: [
+        {
+          href: "mailto:ghost@example.com",
+          principal: "/principals/users/ghost",
+          access: 2,
+          inviteStatus: 1,
+        },
+      ],
+    };
+
+    (getUserDetails as jest.Mock).mockRejectedValue(new Error("Not found"));
+
+    renderWithProviders(
+      <CalendarAccessRights
+        calendar={calendarWithInvite}
+        value={[]}
+        onChange={mockOnChange}
+        onInvitesLoaded={mockOnInvitesLoaded}
+      />
+    );
+
+    await waitFor(() => expect(mockOnInvitesLoaded).toHaveBeenCalledWith([]));
+  });
+
+  it("shows a loading spinner while invite users are being fetched", async () => {
+    const calendarWithInvite: Calendar = {
+      ...baseCalendar,
+      invite: [
+        {
+          href: "mailto:carol@example.com",
+          principal: "/principals/users/carol",
+          access: 2,
+          inviteStatus: 1,
+        },
+      ],
+    };
+
+    // Never resolves during the assertion window
+    (getUserDetails as jest.Mock).mockImplementation(
+      () => new Promise(() => {})
+    );
+
+    renderWithProviders(
+      <CalendarAccessRights
+        calendar={calendarWithInvite}
+        value={[]}
+        onChange={mockOnChange}
+        onInvitesLoaded={mockOnInvitesLoaded}
+      />
+    );
+
+    expect(document.querySelector('[role="progressbar"]')).toBeInTheDocument();
+  });
+});
+
+const userState = {
+  user: {
+    userData: { openpaasId: "user1", email: "user1@example.com" },
+  },
+};
+
+describe("AccessTab – conditional rendering of CalendarAccessRights", () => {
+  const noop = jest.fn();
+
+  afterEach(() => jest.clearAllMocks());
+
+  it("shows CalendarAccessRights when the current user owns the calendar", () => {
+    renderWithProviders(
+      <AccessTab
+        calendar={baseCalendar}
+        usersWithAccess={[]}
+        onUsersWithAccessChange={noop}
+        onInvitesLoaded={noop}
+      />,
+      {
+        ...userState,
+        calendars: { list: { "user1/cal1": baseCalendar } },
+      }
+    );
+
+    expect(
+      screen.getByText("calendarPopover.access.grantAccessRights")
+    ).toBeInTheDocument();
+  });
+
+  it("hides CalendarAccessRights for a non-owner without admin delegation", () => {
+    const foreignCalendar: Calendar = {
+      ...baseCalendar,
+      id: "otherUser/cal1",
+      invite: [],
+    };
+
+    renderWithProviders(
+      <AccessTab
+        calendar={foreignCalendar}
+        usersWithAccess={[]}
+        onUsersWithAccessChange={noop}
+        onInvitesLoaded={noop}
+      />,
+      {
+        ...userState,
+        calendars: { list: { "otherUser/cal1": foreignCalendar } },
+      }
+    );
+
+    expect(
+      screen.queryByText("calendarPopover.access.grantAccessRights")
+    ).not.toBeInTheDocument();
+  });
+
+  it("shows CalendarAccessRights when the user has access=5 (admin) delegation", () => {
+    const delegatedCalendar: Calendar = {
+      ...baseCalendar,
+      id: "otherUser/cal1",
+      invite: [
+        {
+          href: "mailto:user1@example.com",
+          principal: "/principals/users/user1",
+          access: 5,
+          inviteStatus: 1,
+        },
+      ],
+    };
+
+    renderWithProviders(
+      <AccessTab
+        calendar={delegatedCalendar}
+        usersWithAccess={[]}
+        onUsersWithAccessChange={noop}
+        onInvitesLoaded={noop}
+      />,
+      {
+        ...userState,
+        calendars: { list: { "otherUser/cal1": delegatedCalendar } },
+      }
+    );
+
+    expect(
+      screen.getByText("calendarPopover.access.grantAccessRights")
+    ).toBeInTheDocument();
+  });
+});
+
+const existingCalendar: Calendar = {
+  id: "user1/cal1",
+  name: "Existing Cal",
+  description: "Desc",
+  color: { color: "#0062FF", dark: "#FFF" },
+  link: "/calendars/user/cal1",
+  visibility: "public",
+  events: {},
+  invite: [],
+  owner: { emails: ["user1@example.com"] },
+};
+
+describe("CalendarModal – updateDelegationCalendarAsync integration", () => {
+  const mockOnClose = jest.fn();
+
+  beforeEach(() => {
+    jest.clearAllMocks();
+    jest
+      .spyOn(eventThunks, "patchCalendarAsync")
+      .mockImplementation(mockThunkWithUnwrap());
+    jest
+      .spyOn(eventThunks, "patchACLCalendarAsync")
+      .mockImplementation(mockThunkWithUnwrap());
+    jest
+      .spyOn(delegationThunks, "updateDelegationCalendarAsync")
+      .mockImplementation(mockThunkWithUnwrap());
+  });
+
+  it("does NOT call updateDelegationCalendarAsync when no users are added or removed", async () => {
+    renderWithProviders(
+      <CalendarPopover
+        open={true}
+        onClose={mockOnClose}
+        calendar={existingCalendar}
+      />,
+      { ...userState, calendars: { list: { "user1/cal1": existingCalendar } } }
+    );
+
+    fireEvent.click(screen.getByRole("button", { name: /save/i }));
+
+    await waitFor(() => expect(mockOnClose).toHaveBeenCalled());
+
+    expect(
+      delegationThunks.updateDelegationCalendarAsync
+    ).not.toHaveBeenCalled();
+  });
+});
+
+describe("CalendarModal – cancel button", () => {
+  const mockOnClose = jest.fn();
+
+  beforeEach(() => {
+    jest.clearAllMocks();
+    jest
+      .spyOn(delegationThunks, "updateDelegationCalendarAsync")
+      .mockImplementation(mockThunkWithUnwrap());
+    jest
+      .spyOn(eventThunks, "patchCalendarAsync")
+      .mockImplementation(mockThunkWithUnwrap());
+  });
+
+  it("calls onClose without saving when Cancel is clicked", async () => {
+    renderWithProviders(
+      <CalendarPopover
+        open={true}
+        onClose={mockOnClose}
+        calendar={existingCalendar}
+      />,
+      { ...userState }
+    );
+
+    fireEvent.click(screen.getByRole("button", { name: /cancel/i }));
+
+    await waitFor(() => expect(mockOnClose).toHaveBeenCalled());
+    expect(
+      delegationThunks.updateDelegationCalendarAsync
+    ).not.toHaveBeenCalled();
+    expect(eventThunks.patchCalendarAsync).not.toHaveBeenCalled();
+  });
+});
diff --git a/__test__/features/Calendars/CalendarModal.test.tsx b/__test__/features/Calendars/CalendarModal.test.tsx
index 0e9d6d7..e371b2b 100644
--- a/__test__/features/Calendars/CalendarModal.test.tsx
+++ b/__test__/features/Calendars/CalendarModal.test.tsx
@@ -2,6 +2,7 @@ import CalendarPopover from "@/components/Calendar/CalendarModal";
 import { getSecretLink } from "@/features/Calendars/CalendarApi";
 import { Calendar } from "@/features/Calendars/CalendarTypes";
 import * as eventThunks from "@/features/Calendars/services";
+import * as delegationThunks from "@/features/Calendars/services/updateDelegationCalendarAsync";
 import { fireEvent, screen, waitFor } from "@testing-library/react";
 import { renderWithProviders } from "../../utils/Renderwithproviders";
 
@@ -9,11 +10,22 @@ jest.mock("@/features/Calendars/CalendarApi", () => ({
   getSecretLink: jest.fn(),
 }));
 
+const mockThunkWithUnwrap = (resolvedValue: unknown = {}) =>
+  jest.fn().mockImplementation(() => {
+    const dispatchResult = Object.assign(Promise.resolve(resolvedValue), {
+      unwrap: () => Promise.resolve(resolvedValue),
+    });
+    return jest.fn().mockReturnValue(dispatchResult);
+  });
+
 describe("CalendarPopover", () => {
   const mockOnClose = jest.fn();
 
   beforeEach(() => {
     jest.clearAllMocks();
+    jest
+      .spyOn(delegationThunks, "updateDelegationCalendarAsync")
+      .mockImplementation(mockThunkWithUnwrap());
   });
 
   const renderPopover = (open = true) => {
@@ -54,12 +66,11 @@ describe("CalendarPopover", () => {
     expect(descInput).toHaveValue("Test description");
   });
 
-  it("dispatches createCalendar and calls onClose when Save clicked", () => {
-    const spy = jest
+  it("dispatches createCalendar and calls onClose when Save clicked", async () => {
+    jest
       .spyOn(eventThunks, "createCalendarAsync")
-      .mockImplementation((payload) => {
-        return () => Promise.resolve(payload) as any;
-      });
+      .mockImplementation(mockThunkWithUnwrap());
+
     renderPopover();
 
     fireEvent.change(screen.getByLabelText(/Name/i), {
@@ -77,9 +88,12 @@ describe("CalendarPopover", () => {
 
     fireEvent.click(screen.getByRole("button", { name: /Create/i }));
 
-    expect(spy).toHaveBeenCalled();
-
-    expect(mockOnClose).toHaveBeenCalledWith({}, "backdropClick");
+    await waitFor(() =>
+      expect(eventThunks.createCalendarAsync).toHaveBeenCalled()
+    );
+    await waitFor(() =>
+      expect(mockOnClose).toHaveBeenCalledWith({}, "backdropClick")
+    );
   });
 
   it("calls onClose when Cancel clicked", () => {
@@ -116,6 +130,9 @@ describe("CalendarPopover (editing mode)", () => {
 
   beforeEach(() => {
     jest.clearAllMocks();
+    jest
+      .spyOn(delegationThunks, "updateDelegationCalendarAsync")
+      .mockImplementation(mockThunkWithUnwrap());
   });
 
   it("prefills fields when calendar prop is given", () => {
@@ -151,11 +168,9 @@ describe("CalendarPopover (editing mode)", () => {
   });
 
   it("allows modifying and saving existing calendar", async () => {
-    const spy = jest
+    jest
       .spyOn(eventThunks, "patchCalendarAsync")
-      .mockImplementation((payload) => {
-        return () => Promise.resolve(payload) as any;
-      });
+      .mockImplementation(mockThunkWithUnwrap());
 
     renderWithProviders(
       <CalendarPopover
@@ -175,7 +190,7 @@ describe("CalendarPopover (editing mode)", () => {
     fireEvent.click(screen.getByRole("button", { name: "actions.save" }));
 
     await waitFor(() =>
-      expect(spy).toHaveBeenCalledWith(
+      expect(eventThunks.patchCalendarAsync).toHaveBeenCalledWith(
         expect.objectContaining({
           calId: "user1/cal1",
           calLink: "/calendars/user/cal1",
@@ -187,7 +202,7 @@ describe("CalendarPopover (editing mode)", () => {
         })
       )
     );
-    expect(mockOnClose).toHaveBeenCalled();
+    await waitFor(() => expect(mockOnClose).toHaveBeenCalled());
   });
 });
 
@@ -220,6 +235,9 @@ describe("CalendarPopover - Tabs Scenarios", () => {
 
   beforeEach(() => {
     jest.clearAllMocks();
+    jest
+      .spyOn(delegationThunks, "updateDelegationCalendarAsync")
+      .mockImplementation(mockThunkWithUnwrap());
   });
 
   it("resets state after closing and reopening", () => {
@@ -265,11 +283,13 @@ describe("CalendarPopover - Tabs Scenarios", () => {
   });
 
   it("patches ACL when visibility changes", async () => {
-    const patchSpy = jest
+    jest
+      .spyOn(eventThunks, "patchCalendarAsync")
+      .mockImplementation(mockThunkWithUnwrap());
+
+    jest
       .spyOn(eventThunks, "patchACLCalendarAsync")
-      .mockImplementation((payload) => {
-        return () => Promise.resolve(payload) as any;
-      });
+      .mockImplementation(mockThunkWithUnwrap());
 
     renderWithProviders(
       <CalendarPopover
@@ -297,7 +317,7 @@ describe("CalendarPopover - Tabs Scenarios", () => {
     fireEvent.click(screen.getByRole("button", { name: "actions.save" }));
 
     await waitFor(() =>
-      expect(patchSpy).toHaveBeenCalledWith(
+      expect(eventThunks.patchACLCalendarAsync).toHaveBeenCalledWith(
         expect.objectContaining({
           calId: "user1/cal1",
           request: "",
@@ -352,16 +372,12 @@ describe("CalendarPopover - Tabs Scenarios", () => {
     const file = new File(["test"], "events.ics", { type: "text/calendar" });
 
     it("creates a new calendar and imports events when Import with 'new' target", async () => {
-      const createSpy = jest
+      jest
         .spyOn(eventThunks, "createCalendarAsync")
-        .mockImplementation((payload) => {
-          return () => Promise.resolve(payload) as any;
-        });
-      const importSpy = jest
+        .mockImplementation(mockThunkWithUnwrap());
+      jest
         .spyOn(eventThunks, "importEventFromFileAsync")
-        .mockImplementation((payload) => {
-          return () => Promise.resolve(payload) as any;
-        });
+        .mockImplementation(mockThunkWithUnwrap());
 
       renderWithProviders(
         <CalendarPopover open={true} onClose={mockOnClose} />,
@@ -383,16 +399,18 @@ describe("CalendarPopover - Tabs Scenarios", () => {
       // Click Import
       fireEvent.click(screen.getByRole("button", { name: "actions.import" }));
 
-      await waitFor(() => expect(createSpy).toHaveBeenCalled());
-      await waitFor(() => expect(importSpy).toHaveBeenCalled());
+      await waitFor(() =>
+        expect(eventThunks.createCalendarAsync).toHaveBeenCalled()
+      );
+      await waitFor(() =>
+        expect(eventThunks.importEventFromFileAsync).toHaveBeenCalled()
+      );
     });
 
     it("imports into an existing calendar when target is set", async () => {
-      const importSpy = jest
+      jest
         .spyOn(eventThunks, "importEventFromFileAsync")
-        .mockImplementation((payload) => {
-          return () => Promise.resolve(payload) as any;
-        });
+        .mockImplementation(mockThunkWithUnwrap());
 
       const calendars = {
         "user1/cal1": existingCalendar,
@@ -414,7 +432,7 @@ describe("CalendarPopover - Tabs Scenarios", () => {
       fireEvent.click(screen.getByRole("button", { name: "actions.import" }));
 
       await waitFor(() =>
-        expect(importSpy).toHaveBeenCalledWith(
+        expect(eventThunks.importEventFromFileAsync).toHaveBeenCalledWith(
           expect.objectContaining({
             calLink: "/calendars/user1/cal1.json",
             file,
diff --git a/src/components/Calendar/AccessTab.tsx b/src/components/Calendar/AccessTab.tsx
index 2f4d82f..7f35cb1 100644
--- a/src/components/Calendar/AccessTab.tsx
+++ b/src/components/Calendar/AccessTab.tsx
@@ -1,3 +1,4 @@
+import { useAppSelector } from "@/app/hooks";
 import {
   exportCalendar,
   getSecretLink,
@@ -19,9 +20,28 @@ import { useI18n } from "twake-i18n";
 import { ErrorSnackbar } from "../Error/ErrorSnackbar";
 import { FieldWithLabel } from "../Event/components/FieldWithLabel";
 import { SnackbarAlert } from "../Loading/SnackBarAlert";
+import { CalendarAccessRights, UserWithAccess } from "./CalendarAccessRights";
 
-export function AccessTab({ calendar }: { calendar: Calendar }) {
+interface AccessTabProps {
+  calendar: Calendar;
+  usersWithAccess: UserWithAccess[];
+  onUsersWithAccessChange: (users: UserWithAccess[]) => void;
+  onInvitesLoaded: (users: UserWithAccess[]) => void;
+}
+
+export function AccessTab({
+  calendar,
+  usersWithAccess,
+  onUsersWithAccessChange,
+  onInvitesLoaded,
+}: AccessTabProps) {
   const { t } = useI18n();
+  const userData = useAppSelector((state) => state.user.userData);
+  const isPersonalCalendar = userData.openpaasId === calendar.id.split("/")[0];
+  const isDelegatedWithAdministration = calendar.invite?.find(
+    (invite) => invite.href.includes(userData.email) && invite.access === 5
+  );
+
   const calDAVLink = `${window.DAV_BASE_URL}${calendar.link.replace(".json", "")}`;
 
   const [secretLink, setSecretLink] = useState("");
@@ -60,11 +80,8 @@ export function AccessTab({ calendar }: { calendar: Calendar }) {
       const exportedData = await exportCalendar(
         calendar.link.replace(".json", "")
       );
-      const blob = new Blob([exportedData], {
-        type: "text/calendar",
-      });
+      const blob = new Blob([exportedData], { type: "text/calendar" });
       const url = URL.createObjectURL(blob);
-
       const link = document.createElement("a");
       link.href = url;
       link.download = `${calendar.id.split("/")[1]}.ics`;
@@ -74,7 +91,6 @@ export function AccessTab({ calendar }: { calendar: Calendar }) {
       URL.revokeObjectURL(url);
     } catch (e) {
       setExportError((e as Error).message);
-      setExportLoading(false);
     } finally {
       setExportLoading(false);
     }
@@ -82,6 +98,15 @@ export function AccessTab({ calendar }: { calendar: Calendar }) {
 
   return (
     <>
+      {(isPersonalCalendar || isDelegatedWithAdministration) && (
+        <CalendarAccessRights
+          calendar={calendar}
+          value={usersWithAccess}
+          onChange={onUsersWithAccessChange}
+          onInvitesLoaded={onInvitesLoaded}
+        />
+      )}
+
       {!!window.DAV_BASE_URL && (
         <FieldWithLabel label={t("calendar.caldav_access")} isExpanded={false}>
           <Box mt={2}>
@@ -108,6 +133,7 @@ export function AccessTab({ calendar }: { calendar: Calendar }) {
           </Box>
         </FieldWithLabel>
       )}
+
       <FieldWithLabel label={t("calendar.secretUrl")} isExpanded={false}>
         <Box mt={3} display="flex" alignItems="center" gap={1}>
           <TextField
@@ -147,11 +173,10 @@ export function AccessTab({ calendar }: { calendar: Calendar }) {
       <FieldWithLabel label={t("calendar.exportCalendar")} isExpanded={false}>
         <Typography
           variant="body2"
-          sx={{ color: "text.secondary", m: 1, lineHeight: 1.5 }}
+          sx={{ color: "text.secondary", my: 1, lineHeight: 1.5 }}
         >
           {t("calendar.exportDesc")}
         </Typography>
-
         <Button
           variant="contained"
           color="secondary"
diff --git a/src/components/Calendar/CalendarAccessRights.tsx b/src/components/Calendar/CalendarAccessRights.tsx
new file mode 100644
index 0000000..ccf6897
--- /dev/null
+++ b/src/components/Calendar/CalendarAccessRights.tsx
@@ -0,0 +1,354 @@
+import { AccessRight, Calendar } from "@/features/Calendars/CalendarTypes";
+import { getUserDetails } from "@/features/User/userAPI";
+import {
+  AutocompleteRenderInputParams,
+  Avatar,
+  Box,
+  CircularProgress,
+  IconButton,
+  InputAdornment,
+  MenuItem,
+  Select,
+  TextField,
+  Typography,
+} from "@linagora/twake-mui";
+import HighlightOffIcon from "@mui/icons-material/HighlightOff";
+import PeopleOutlineOutlinedIcon from "@mui/icons-material/PeopleOutlineOutlined";
+import { useEffect, useRef, useState } from "react";
+import { useI18n } from "twake-i18n";
+import { PeopleSearch, User } from "../Attendees/PeopleSearch";
+import { FieldWithLabel } from "../Event/components/FieldWithLabel";
+import { stringAvatar } from "../Event/utils/eventUtils";
+
+export interface UserWithAccess extends User {
+  accessRight: AccessRight;
+}
+
+interface CalendarAccessRightsProps {
+  calendar: Calendar;
+  value: UserWithAccess[];
+  onChange: (users: UserWithAccess[]) => void;
+  onInvitesLoaded: (users: UserWithAccess[]) => void;
+}
+
+export function CalendarAccessRights({
+  calendar,
+  value: usersWithAccess,
+  onChange,
+  onInvitesLoaded,
+}: CalendarAccessRightsProps) {
+  const { t } = useI18n();
+
+  const containerRef = useRef<HTMLDivElement>(null);
+  const [searchWidth, setSearchWidth] = useState<number | undefined>(undefined);
+  const [accessRight, setAccessRight] = useState<AccessRight>(2);
+  const [inviteLoading, setInvitesLoading] = useState(false);
+
+  const currentUsersRef = useRef<UserWithAccess[]>(usersWithAccess);
+  useEffect(() => {
+    currentUsersRef.current = usersWithAccess;
+  }, [usersWithAccess]);
+
+  useEffect(() => {
+    if (!containerRef.current) return;
+    const observer = new ResizeObserver((entries) => {
+      for (const entry of entries) {
+        setSearchWidth(entry.contentRect.width);
+      }
+    });
+    observer.observe(containerRef.current);
+    return () => observer.disconnect();
+  }, []);
+
+  useEffect(() => {
+    if (!calendar.invite?.length) return;
+
+    let cancelled = false;
+
+    async function loadInvitedUsers() {
+      setInvitesLoading(true);
+      try {
+        const loaded: UserWithAccess[] = (
+          await Promise.all(
+            calendar.invite.map(async (invite) => {
+              const principalId = invite.principal.split("/").pop();
+              if (!principalId) return null;
+              try {
+                const details = await getUserDetails(principalId);
+                const email =
+                  details?.preferredEmail ?? details?.emails?.[0] ?? "";
+                return {
+                  openpaasId: principalId,
+                  displayName:
+                    [details?.firstname, details?.lastname]
+                      .filter(Boolean)
+                      .join(" ")
+                      .trim() || email,
+                  email,
+                  accessRight: invite.access as AccessRight,
+                } satisfies UserWithAccess;
+              } catch {
+                return null;
+              }
+            })
+          )
+        ).filter((u) => u !== null && !!u.email);
+
+        if (cancelled) return;
+
+        const loadedIds = new Set(loaded.map((u) => normalizeEmail(u.email)));
+        const manuallyAdded = currentUsersRef.current.filter(
+          (u) => !loadedIds.has(normalizeEmail(u.email))
+        );
+        const merged = [...loaded, ...manuallyAdded];
+
+        onInvitesLoaded(loaded);
+        onChange(merged);
+      } finally {
+        if (!cancelled) setInvitesLoading(false);
+      }
+    }
+
+    loadInvitedUsers();
+    return () => {
+      cancelled = true;
+    };
+  }, [calendar.invite, onChange, onInvitesLoaded]);
+
+  const normalizeEmail = (email?: string) => email?.trim().toLowerCase() ?? "";
+
+  const handleUserSelect = (_event: unknown, users: User[]) => {
+    const updated: UserWithAccess[] = users.map((user) => {
+      const existing = usersWithAccess.find(
+        (u) => normalizeEmail(u.email) === normalizeEmail(user.email)
+      );
+      return existing ?? { ...user, accessRight };
+    });
+    onChange(updated);
+  };
+
+  const handleRemoveUser = (email: string) => {
+    onChange(
+      usersWithAccess.filter(
+        (u) => normalizeEmail(u.email) !== normalizeEmail(email)
+      )
+    );
+  };
+
+  const handleChangeUserRight = (email: string, right: AccessRight) => {
+    onChange(
+      usersWithAccess.map((u) =>
+        normalizeEmail(u.email) === normalizeEmail(email)
+          ? { ...u, accessRight: right }
+          : u
+      )
+    );
+  };
+
+  const accessRightOptions: { value: AccessRight; label: string }[] = [
+    { value: 2, label: t("calendarPopover.access.viewAllEvents") },
+    { value: 3, label: t("calendarPopover.access.editor") },
+    { value: 5, label: t("calendarPopover.access.administrator") },
+  ];
+
+  return (
+    <FieldWithLabel
+      label={t("calendarPopover.access.grantAccessRights")}
+      isExpanded={false}
+    >
+      <Box ref={containerRef}>
+        <PeopleSearch
+          selectedUsers={usersWithAccess}
+          onChange={handleUserSelect}
+          objectTypes={["user"]}
+          onToggleEventPreview={() => {}}
+          customSlotProps={{
+            popper: {
+              anchorEl: containerRef.current,
+              placement: "bottom-start",
+              sx: {
+                minWidth: searchWidth,
+                "& .MuiPaper-root": {
+                  width: "100%",
+                },
+              },
+              modifiers: [
+                {
+                  name: "offset",
+                  options: {
+                    offset: [0, 8],
+                  },
+                },
+              ],
+            },
+          }}
+          customRenderInput={(
+            params: AutocompleteRenderInputParams,
+            query: string,
+            setQuery: (value: string) => void
+          ) => (
+            <TextField
+              {...params}
+              fullWidth
+              autoFocus
+              placeholder={t("peopleSearch.label")}
+              value={query}
+              inputRef={(el) => {
+                const ref = params.InputProps.ref;
+                if (typeof ref === "function") {
+                  ref(el);
+                } else if (ref && "current" in ref) {
+                  (
+                    ref as React.MutableRefObject<HTMLInputElement | null>
+                  ).current = el;
+                }
+              }}
+              onChange={(e) => setQuery(e.target.value)}
+              variant="outlined"
+              inputProps={{
+                ...params.inputProps,
+                sx: {
+                  fontSize: "14px",
+                  "&::placeholder": { fontSize: "14px" },
+                },
+              }}
+              InputProps={{
+                ...params.InputProps,
+                startAdornment: (
+                  <InputAdornment position="start">
+                    <PeopleOutlineOutlinedIcon
+                      sx={{ color: "text.secondary" }}
+                    />
+                  </InputAdornment>
+                ),
+                endAdornment: (
+                  <InputAdornment position="end">
+                    <Select
+                      value={accessRight}
+                      onChange={(e) =>
+                        setAccessRight(e.target.value as AccessRight)
+                      }
+                      variant="standard"
+                      disableUnderline
+                      sx={{
+                        fontSize: "0.875rem",
+                        color: "text.secondary",
+                        "& .MuiSelect-select": {
+                          paddingRight: "24px !important",
+                          paddingY: 0,
+                        },
+                        "& .MuiSelect-icon": { fontSize: "1rem" },
+                        "&:before, &:after": { display: "none" },
+                      }}
+                    >
+                      {accessRightOptions.map((opt) => (
+                        <MenuItem
+                          key={opt.value}
+                          value={opt.value}
+                          sx={{ color: "text.secondary" }}
+                        >
+                          {opt.label}
+                        </MenuItem>
+                      ))}
+                    </Select>
+                  </InputAdornment>
+                ),
+              }}
+            />
+          )}
+        />
+      </Box>
+
+      {inviteLoading ? (
+        <Box mt={2} display="flex" justifyContent="center">
+          <CircularProgress size={24} />
+        </Box>
+      ) : (
+        usersWithAccess.length > 0 && (
+          <Box mt={2} display="flex" flexDirection="column" gap={1}>
+            {usersWithAccess.map((user) => (
+              <Box
+                key={user.email}
+                display="flex"
+                alignItems="center"
+                justifyContent="space-between"
+                px={1}
+                py={0.5}
+                sx={{
+                  borderRadius: "8px",
+                  "&:hover": { backgroundColor: "action.hover" },
+                }}
+              >
+                <Box display="flex" alignItems="center" gap={1.5} minWidth={0}>
+                  <Avatar
+                    {...stringAvatar(user.displayName)}
+                    sx={{ width: 28, height: 28, fontSize: "0.875rem" }}
+                  >
+                    {user.displayName?.[0]?.toUpperCase()}
+                  </Avatar>
+                  <Box
+                    minWidth={0}
+                    display="flex"
+                    flexDirection="column"
+                    gap={0}
+                  >
+                    <Typography noWrap>{user.displayName}</Typography>
+                    <Typography variant="caption" color="text.secondary">
+                      {user.email}
+                    </Typography>
+                  </Box>
+                </Box>
+
+                <Box
+                  display="flex"
+                  alignItems="center"
+                  gap={0.5}
+                  flexShrink={0}
+                >
+                  <Select
+                    value={user.accessRight}
+                    onChange={(e) =>
+                      handleChangeUserRight(
+                        user.email,
+                        e.target.value as AccessRight
+                      )
+                    }
+                    variant="standard"
+                    disableUnderline
+                    sx={{
+                      fontSize: "0.875rem",
+                      color: "text.secondary",
+                      "& .MuiSelect-select": {
+                        paddingRight: "24px !important",
+                        paddingY: 0,
+                      },
+                      "& .MuiSelect-icon": { fontSize: "1rem" },
+                    }}
+                  >
+                    {accessRightOptions.map((opt) => (
+                      <MenuItem
+                        key={opt.value}
+                        value={opt.value}
+                        sx={{ color: "text.secondary" }}
+                      >
+                        {opt.label}
+                      </MenuItem>
+                    ))}
+                  </Select>
+                  <IconButton
+                    size="small"
+                    aria-label={t("actions.remove")}
+                    onClick={() => handleRemoveUser(user.email)}
+                    sx={{ color: "text.secondary" }}
+                  >
+                    <HighlightOffIcon fontSize="small" />
+                  </IconButton>
+                </Box>
+              </Box>
+            ))}
+          </Box>
+        )
+      )}
+    </FieldWithLabel>
+  );
+}
diff --git a/src/components/Calendar/CalendarModal.tsx b/src/components/Calendar/CalendarModal.tsx
index 5686f38..cb3b201 100644
--- a/src/components/Calendar/CalendarModal.tsx
+++ b/src/components/Calendar/CalendarModal.tsx
@@ -6,15 +6,19 @@ import {
   patchACLCalendarAsync,
   patchCalendarAsync,
 } from "@/features/Calendars/services";
+import { updateDelegationCalendarAsync } from "@/features/Calendars/services/updateDelegationCalendarAsync";
+import { accessRightToDavProp } from "@/utils/accessRightToDavProp";
+import { defaultColors } from "@/utils/defaultColors";
 import { extractEventBaseUuid } from "@/utils/extractEventBaseUuid";
 import { Button, Tab, Tabs } from "@linagora/twake-mui";
-import { useEffect, useState } from "react";
+import { useCallback, useEffect, useRef, useState } from "react";
 import { useI18n } from "twake-i18n";
 import { ResponsiveDialog } from "../Dialog";
+import { ErrorSnackbar } from "../Error/ErrorSnackbar";
 import { AccessTab } from "./AccessTab";
+import { UserWithAccess } from "./CalendarAccessRights";
 import { ImportTab } from "./ImportTab";
 import { SettingsTab } from "./SettingsTab";
-import { defaultColors } from "@/utils/defaultColors";
 
 function CalendarPopover({
   open,
@@ -42,6 +46,13 @@ function CalendarPopover({
   const [color, setColor] = useState<Record<string, string>>(defaultColors[0]);
   const [visibility, setVisibility] = useState<"private" | "public">("public");
 
+  // access tab state
+  const [usersWithAccess, setUsersWithAccess] = useState<UserWithAccess[]>([]);
+
+  // Snapshot of the invitee list as loaded from calendar.invite on open.
+  // Used to diff on save: what changed vs what was removed.
+  const initialUsersRef = useRef<UserWithAccess[]>([]);
+
   // import tab state
   const [tab, setTab] = useState<"settings" | "access" | "import">("settings");
   const [importedContent, setImportedContent] = useState<File | null>(null);
@@ -70,27 +81,82 @@ function CalendarPopover({
       setVisibility("public");
       setImportTarget("new");
     }
+    setUsersWithAccess([]);
+    initialUsersRef.current = [];
   }, [calendar, open]);
 
-  const updateCalendar = (calId: string, calLink: string) => {
-    dispatch(
-      patchCalendarAsync({
-        calId,
-        calLink,
-        patch: { name: name.trim(), desc: description.trim(), color },
-      })
-    );
+  const handleUsersWithAccessChange = useCallback((users: UserWithAccess[]) => {
+    setUsersWithAccess(users);
+  }, []);
+
+  const handleInvitesLoaded = useCallback((users: UserWithAccess[]) => {
+    if (initialUsersRef.current.length === 0) {
+      initialUsersRef.current = users;
+    }
+  }, []);
+
+  const [saveError, setSaveError] = useState("");
+
+  const updateCalendar = async (calId: string, calLink: string) => {
+    const nameChanged = name.trim() !== calendar?.name;
+    const descChanged = description.trim() !== (calendar?.description ?? "");
+    const colorChanged =
+      JSON.stringify(color) !==
+      JSON.stringify(calendar?.color ?? defaultColors[0]);
+
+    if (nameChanged || descChanged || colorChanged) {
+      await dispatch(
+        patchCalendarAsync({
+          calId,
+          calLink,
+          patch: { name: name.trim(), desc: description.trim(), color },
+        })
+      ).unwrap();
+    }
+
     if (visibility !== calendar?.visibility) {
-      dispatch(
+      await dispatch(
         patchACLCalendarAsync({
           calId,
           calLink,
           request: visibility === "public" ? "{DAV:}read" : "",
         })
-      );
+      ).unwrap();
     }
   };
 
+  async function updateCalendarInvites(calLink: string) {
+    const normaliseEmail = (u: UserWithAccess) =>
+      u.email?.trim().toLowerCase() ?? "";
+
+    const currentMap = new Map(
+      usersWithAccess
+        .filter((u) => !!normaliseEmail(u))
+        .map((u) => [normaliseEmail(u), u])
+    );
+
+    const set = usersWithAccess
+      .filter((u) => !!normaliseEmail(u))
+      .map((u) => ({
+        "dav:href": `mailto:${normaliseEmail(u)}`,
+        [accessRightToDavProp(u.accessRight)]: true,
+      }));
+
+    const remove = initialUsersRef.current
+      .filter((u) => !!normaliseEmail(u) && !currentMap.has(normaliseEmail(u)))
+      .map((u) => ({ "dav:href": `mailto:${normaliseEmail(u)}` }));
+
+    if (set.length === 0 && remove.length === 0) return;
+
+    await dispatch(
+      updateDelegationCalendarAsync({
+        calId: calendar?.id,
+        calLink,
+        share: { set, remove },
+      })
+    ).unwrap();
+  }
+
   const createCalendar = async (
     calId: string,
     name: string,
@@ -116,15 +182,19 @@ function CalendarPopover({
     );
   };
 
-  const handleSave = () => {
+  const handleSave = async () => {
     if (!name.trim()) return;
-
     if (calendar) {
-      updateCalendar(calendar.id, calendar.link);
+      try {
+        await updateCalendar(calendar.id, calendar.link);
+        await updateCalendarInvites(calendar.link);
+      } catch {
+        setSaveError(t("error.title"));
+        return;
+      }
     } else {
       createCalendar(crypto.randomUUID(), name, description, color, visibility);
     }
-    handleClose({}, "backdropClick");
   };
 
   const handleImport = async () => {
@@ -162,9 +232,14 @@ function CalendarPopover({
 
   const handleClose = (
     e: object | null,
-    reason: "backdropClick" | "escapeKeyDown"
+    reason: "backdropClick" | "escapeKeyDown" | "cancel"
   ): void => {
-    onClose(e, reason);
+    if (reason !== "cancel") {
+      handleSave();
+      onClose(e, reason);
+    } else {
+      onClose(e, "backdropClick");
+    }
     setName("");
     setDescription("");
     setColor(defaultColors[0]);
@@ -172,7 +247,9 @@ function CalendarPopover({
     setVisibility("public");
     setImportTarget("new");
     setImportedContent(null);
-
+    setUsersWithAccess([]);
+    initialUsersRef.current = [];
+    setSaveError("");
     setNewCalName("");
     setNewCalDescription("");
     setNewCalColor(defaultColors[0]);
@@ -203,16 +280,17 @@ function CalendarPopover({
       }
       actions={
         <>
-          <Button
-            variant="outlined"
-            onClick={() => handleClose({}, "backdropClick")}
-          >
+          <Button variant="outlined" onClick={() => handleClose({}, "cancel")}>
             {t("common.cancel")}
           </Button>
           <Button
             disabled={tab === "import" ? !importedContent : !name.trim()}
             variant="contained"
-            onClick={tab === "import" ? handleImport : handleSave}
+            onClick={
+              tab === "import"
+                ? handleImport
+                : () => handleClose({}, "backdropClick")
+            }
           >
             {tab === "import"
               ? t("actions.import")
@@ -254,7 +332,15 @@ function CalendarPopover({
           calendar={calendar}
         />
       )}
-      {tab === "access" && calendar && <AccessTab calendar={calendar} />}
+      {tab === "access" && calendar && (
+        <AccessTab
+          calendar={calendar}
+          usersWithAccess={usersWithAccess}
+          onUsersWithAccessChange={handleUsersWithAccessChange}
+          onInvitesLoaded={handleInvitesLoaded}
+        />
+      )}
+      <ErrorSnackbar error={saveError} type="calendar" />
     </ResponsiveDialog>
   );
 }
diff --git a/src/features/Calendars/CalendarTypes.ts b/src/features/Calendars/CalendarTypes.ts
index 088a32d..49ca7c9 100644
--- a/src/features/Calendars/CalendarTypes.ts
+++ b/src/features/Calendars/CalendarTypes.ts
@@ -17,6 +17,7 @@ export interface Calendar {
   access?: DelegationAccess;
   lastCacheCleared?: number;
   syncToken?: string;
+  invite?: CalendarInvite[];
 }
 
 export interface DelegationAccess {
@@ -26,3 +27,12 @@ export interface DelegationAccess {
   "write-properties": boolean;
   all: boolean;
 }
+
+export type CalendarInvite = {
+  href: string;
+  principal: string;
+  access: AccessRight;
+  inviteStatus: number;
+};
+
+export type AccessRight = 2 | 3 | 5; // VIEW = 2, EDITOR = 3, ADMIN = 5
diff --git a/src/features/Calendars/api/updateDelegationCalendar.ts b/src/features/Calendars/api/updateDelegationCalendar.ts
new file mode 100644
index 0000000..4ca0bb4
--- /dev/null
+++ b/src/features/Calendars/api/updateDelegationCalendar.ts
@@ -0,0 +1,17 @@
+import { api } from "@/utils/apiUtils";
+
+export async function updateDelegationCalendar(
+  calLink: string,
+  share: {
+    set: { [x: string]: string | boolean; "dav:href": string }[];
+    remove: { [x: string]: string | boolean; "dav:href": string }[];
+  }
+) {
+  const response = await api.post(`dav${calLink}`, {
+    headers: {
+      Accept: "application/json, text/plain, */*",
+    },
+    body: JSON.stringify({ share }),
+  });
+  return response;
+}
diff --git a/src/features/Calendars/services/getCalendarsListAsync.ts b/src/features/Calendars/services/getCalendarsListAsync.ts
index 71b908a..af135bd 100644
--- a/src/features/Calendars/services/getCalendarsListAsync.ts
+++ b/src/features/Calendars/services/getCalendarsListAsync.ts
@@ -1,11 +1,11 @@
 import { RootState } from "@/app/store";
-import { defaultColors } from "@/utils/defaultColors";
 import { OpenPaasUserData } from "@/features/User/type/OpenPaasUserData";
 import { getOpenPaasUser, getUserDetails } from "@/features/User/userAPI";
+import { defaultColors } from "@/utils/defaultColors";
 import { formatReduxError } from "@/utils/errorUtils";
 import { createAsyncThunk } from "@reduxjs/toolkit";
 import { getCalendars } from "../CalendarApi";
-import { Calendar } from "../CalendarTypes";
+import { Calendar, CalendarInvite } from "../CalendarTypes";
 import { CalendarData } from "../types/CalendarData";
 import { RejectedError } from "../types/RejectedError";
 import { normalizeCalendar } from "../utils/normalizeCalendar";
@@ -82,6 +82,18 @@ export const getCalendarsListAsync = createAsyncThunk<
               dark: "#FFF",
             }
           : defaultColors[0];
+
+        const invite: CalendarInvite[] = (
+          (cal.invite ?? []) as Array<{
+            href: string;
+            principal: string;
+            access: number;
+            inviteStatus: number;
+          }>
+        ).filter((inv): inv is CalendarInvite =>
+          [2, 3, 5].includes(inv.access)
+        );
+
         fetchedCalendars[id] = {
           id,
           name: cal["dav:name"] ?? "",
@@ -93,6 +105,7 @@ export const getCalendarsListAsync = createAsyncThunk<
           visibility,
           access,
           events: {},
+          invite,
         };
       }
     );
diff --git a/src/features/Calendars/services/updateDelegationCalendarAsync.ts b/src/features/Calendars/services/updateDelegationCalendarAsync.ts
new file mode 100644
index 0000000..b179a61
--- /dev/null
+++ b/src/features/Calendars/services/updateDelegationCalendarAsync.ts
@@ -0,0 +1,33 @@
+import { toRejectedError } from "@/utils/errorUtils";
+import { createAsyncThunk } from "@reduxjs/toolkit";
+import { updateDelegationCalendar } from "../api/updateDelegationCalendar";
+import { RejectedError } from "../types/RejectedError";
+
+export const updateDelegationCalendarAsync = createAsyncThunk<
+  {
+    calId: string;
+    calLink: string;
+  },
+  {
+    calId: string;
+    calLink: string;
+    share: {
+      set: { [x: string]: string | boolean; "dav:href": string }[];
+      remove: { [x: string]: string | boolean; "dav:href": string }[];
+    };
+  },
+  { rejectValue: RejectedError }
+>(
+  "calendars/patchDelegationCalendar",
+  async ({ calId, calLink, share }, { rejectWithValue }) => {
+    try {
+      await updateDelegationCalendar(calLink, share);
+      return {
+        calId,
+        calLink,
+      };
+    } catch (err) {
+      return rejectWithValue(toRejectedError(err));
+    }
+  }
+);
diff --git a/src/locales/en.json b/src/locales/en.json
index 613847c..2b21b2a 100644
--- a/src/locales/en.json
+++ b/src/locales/en.json
@@ -81,6 +81,12 @@
     },
     "settings": {
       "calendarName": "Calendar name"
+    },
+    "access": {
+      "grantAccessRights": "Grant Access rights",
+      "viewAllEvents": "View all events",
+      "editor": "Editor",
+      "administrator": "Administrator"
     }
   },
   "colorPicker": {
diff --git a/src/utils/accessRightToDavProp.tsx b/src/utils/accessRightToDavProp.tsx
new file mode 100644
index 0000000..d7bc0e5
--- /dev/null
+++ b/src/utils/accessRightToDavProp.tsx
@@ -0,0 +1,16 @@
+import { AccessRight } from "@/features/Calendars/CalendarTypes";
+
+// Maps our AccessRight numeric value to the DAV share property key
+export function accessRightToDavProp(
+  right: AccessRight
+): "dav:administration" | "dav:read-write" | "dav:read" {
+  switch (right) {
+    case 5:
+      return "dav:administration";
+    case 3:
+      return "dav:read-write";
+    case 2:
+    default:
+      return "dav:read";
+  }
+}