Add a couple more error messages during authentication. (#2497)

* Add copy for error when signing in with refresh tokens enabled.

* Show an error when a server's well-known file is invalid.

* Changelog.

* Fix wrong alert.

ElementX/Sources/Screens/Authentication/ServerSelectionScreen/ServerSelectionScreenCoordinator.swift

@@ -111,6 +111,8 @@ final class ServerSelectionScreenCoordinator: CoordinatorProtocol {
         switch error {
         case .invalidServer, .invalidHomeserverAddress:
             viewModel.displayError(.footerMessage(L10n.screenChangeServerErrorInvalidHomeserver))
+        case .invalidWellKnown(let error):
+            viewModel.displayError(.invalidWellKnownAlert(error))
         case .slidingSyncNotAvailable:
             viewModel.displayError(.slidingSyncAlert)
         default:

ElementX/Sources/Screens/Authentication/ServerSelectionScreen/ServerSelectionScreenModels.swift

@@ -87,6 +87,8 @@ enum ServerSelectionScreenViewAction {
 enum ServerSelectionScreenErrorType: Hashable {
     /// An error message to be shown in the text field footer.
     case footerMessage(String)
+    /// An alert that informs the user about a bad well-known file.
+    case invalidWellKnownAlert(String)
     /// An alert that allows the user to learn about sliding sync.
     case slidingSyncAlert
 }

ElementX/Sources/Screens/Authentication/ServerSelectionScreen/ServerSelectionScreenViewModel.swift

@@ -54,6 +54,10 @@ class ServerSelectionScreenViewModel: ServerSelectionScreenViewModelType, Server
             withElementAnimation {
                 state.footerErrorMessage = message
             }
+        case .invalidWellKnownAlert(let error):
+            state.bindings.alertInfo = AlertInfo(id: .slidingSyncAlert,
+                                                 title: L10n.commonServerNotSupported,
+                                                 message: L10n.screenChangeServerErrorInvalidWellKnown(error))
         case .slidingSyncAlert:
             let openURL = { UIApplication.shared.open(self.slidingSyncLearnMoreURL) }
             state.bindings.alertInfo = AlertInfo(id: .slidingSyncAlert,