fixed issues in refresh

Signed-off-by: Matt Bruce <mbrucedogs@gmail.com>

EmployeeDirectory/ViewControllers/EmployeesViewController.swift

@@ -139,12 +139,13 @@ class EmployeesViewController: UIViewController {
         viewModel.$isLoading
             .receive(on: RunLoop.main)
             .sink { [weak self] isLoading in
+                guard let self, let refreshControl = self.tableView.refreshControl else { return }
                 if isLoading {
-                    self?.activityIndicator.startAnimating()
+                    activityIndicator.startAnimating()
                 } else {
-                    self?.activityIndicator.stopAnimating()
-                    self?.tableView.refreshControl?.endRefreshing()
-                    self?.updateFooter()
+                    activityIndicator.stopAnimating()
+                    refreshControl.endRefreshing()
+                    updateFooter()
                 }
             }
             .store(in: &cancellables)
@@ -182,7 +183,7 @@ class EmployeesViewController: UIViewController {
         var footerMessage: String?
         
         // Check for error messages or empty state first
-        if let message = viewModel.errorMessage ?? (viewModel.employees.isEmpty && !viewModel.isLoading ? "No employees found, please try to refresh." : nil) {
+        if let message = viewModel.errorMessage ?? (viewModel.employees.isEmpty && viewModel.isLoading == false ? "No employees found, please try to refresh." : nil) {
             footerMessage = message
             
         }        

EmployeeDirectory/ViewModels/EmployeesViewModel.swift

@@ -46,10 +46,11 @@ public class EmployeesViewModel: ObservableObject {
 
     /// Fetch employees for the given page
     public func fetchEmployees(page: Int = 1) {
+        
         // Prevent duplicate calls
         guard !isLoading else { return }
+        errorMessage = nil
         isLoading = true
-
         Task {
             do {
                 // Fetch employees using the paginated API
@@ -68,6 +69,7 @@ public class EmployeesViewModel: ObservableObject {
                 } else {
                     employees.append(contentsOf: wrapper.employees) // Append for subsequent pages
                 }
+
             } catch {
                 // Handle errors
                 errorMessage = "An unexpected error occurred, please try to refresh."