[Bookings] Attendance status update failure notice and retry

WooCommerce/Classes/ViewModels/Booking Details/BookingDetailsViewModel.swift

@@ -27,6 +27,7 @@ final class BookingDetailsViewModel: ObservableObject {
 
     @Published private(set) var navigationTitle = ""
     @Published private(set) var sections: [Section] = []
+    @Published var notice: Notice?
 
     var bookingAttendanceStatus: BookingAttendanceStatus {
         booking.attendanceStatus
@@ -233,14 +234,32 @@ extension BookingDetailsViewModel {
             siteID: booking.siteID,
             bookingID: booking.bookingID,
             status: newStatus
-        ) { error in
-            if let error {
+        ) { [weak self] error in
+            if let error, let self {
                 DDLogError("⛔️ Error updating booking attendance status: \(error)")
-                // TODO: Show an error notice to the user
+                displayAttendanceStatusUpdatedErrorNotice(status: newStatus)
             }
         }
         stores.dispatch(action)
     }
+
+    private func displayAttendanceStatusUpdatedErrorNotice(status: BookingAttendanceStatus) {
+        let text = String.localizedStringWithFormat(
+            Localization.bookingAttendanceStatusUpdateFailedMessage,
+            booking.bookingID
+        )
+        self.notice = Notice(
+            message: text,
+            feedbackType: .error,
+            actionTitle: Localization.retryActionTitle
+        ) { [weak self] in
+            guard let self else {
+                return
+            }
+
+            updateAttendanceStatus(to: status)
+        }
+    }
 }
 
 private extension BookingDetailsViewModel {
@@ -362,5 +381,19 @@ private extension BookingDetailsViewModel {
             value: "%1$@ will no longer be able to attend “%2$@” on %3$@.",
             comment: "Message for the booking cancellation confirmation alert. %1$@ is customer name, %2$@ is product name, %3$@ is booking date."
         )
+
+        static let bookingAttendanceStatusUpdateFailedMessage = NSLocalizedString(
+            "BookingDetailsView.attendanceStatus.updateFailed.message",
+            value: "Unable to change attendance status of Booking #%1$d",
+            comment: "Content of error presented when updating the attendance status of a Booking fails. "
+            + "It reads: Unable to change status of Booking #{Booking number}. "
+            + "Parameters: %1$d - Booking number"
+        )
+
+        static let retryActionTitle = NSLocalizedString(
+            "BookingDetailsView.retry.action",
+            value: "Retry",
+            comment: "Retry Action"
+        )
     }
 }

WooCommerce/Classes/ViewRelated/Bookings/Booking Details/BookingDetailsView.swift

@@ -103,6 +103,7 @@ struct BookingDetailsView: View {
             Text(viewModel.cancellationAlertMessage)
         }
         .notice($notice)
+        .notice($viewModel.notice)
     }
 }
 

WooCommerce/WooCommerceTests/ViewRelated/Bookings/BookingDetailsViewModelTests.swift

@@ -247,6 +247,42 @@ final class BookingDetailsViewModelTests: XCTestCase {
         XCTAssertEqual(status, newStatus)
     }
 
+    func test_error_notice_displayed_when_attendance_staus_update_fails() {
+        // Given
+        let booking = Booking.fake()
+        let viewModel = BookingDetailsViewModel(booking: booking, stores: storesManager)
+        let newStatus = BookingAttendanceStatus.checkedIn
+        enum TestError: Error { case generic }
+
+        // When
+        viewModel.updateAttendanceStatus(to: newStatus)
+
+        // Then
+        XCTAssertEqual(storesManager.receivedActions.count, 1)
+        guard let action = storesManager.receivedActions.first as? BookingAction else {
+            XCTFail("Incorrect action type dispatched")
+            return
+        }
+
+        guard case let .updateBookingAttendanceStatus(_, _, _, onCompletion) = action else {
+            XCTFail("Incorrect action case dispatched")
+            return
+        }
+
+        onCompletion(TestError.generic)
+
+        XCTAssertNotNil(viewModel.notice)
+        XCTAssertEqual(viewModel.notice?.feedbackType, .error)
+
+        let messageFormat = NSLocalizedString(
+            "BookingDetailsView.attendanceStatus.updateFailed.message",
+            value: "Unable to change attendance status of Booking #%1$d",
+            comment: ""
+        )
+        let expectedMessage = String(format: messageFormat, booking.bookingID)
+        XCTAssertEqual(viewModel.notice?.message, expectedMessage)
+    }
+
     func test_init_whenBookingHasStatusAndAttendanceStatus_updatesHeaderContentWithCorrectLocalizedStrings() {
         // Given
         let booking = Booking.fake().copy(