Expose sliding sync proxy URL on the server selection screen; make app more resilient to slidinc sync configuration errors, remove fatal errors

ElementX/Sources/Screens/Authentication/ServerSelection/ServerSelectionModels.swift

@@ -59,6 +59,8 @@ struct ServerSelectionViewState: BindableState {
 struct ServerSelectionBindings {
     /// The homeserver address input by the user.
     var homeserverAddress: String
+    /// The sliding sync proxy address input by the user.
+    var slidingSyncProxyAddress: String
     /// Information describing the currently displayed alert.
     var alertInfo: AlertInfo<ServerSelectionErrorType>?
 }

ElementX/Sources/Screens/Authentication/ServerSelection/ServerSelectionViewModel.swift

@@ -30,7 +30,9 @@ class ServerSelectionViewModel: ServerSelectionViewModelType, ServerSelectionVie
     // MARK: - Setup
     
     init(homeserverAddress: String, isModallyPresented: Bool) {
-        let bindings = ServerSelectionBindings(homeserverAddress: homeserverAddress)
+        let bindings = ServerSelectionBindings(homeserverAddress: homeserverAddress,
+                                               slidingSyncProxyAddress: ElementSettings.shared.slidingSyncProxyBaseURLString)
+        
         super.init(initialViewState: ServerSelectionViewState(bindings: bindings,
                                                               isModallyPresented: isModallyPresented))
     }
@@ -40,6 +42,10 @@ class ServerSelectionViewModel: ServerSelectionViewModelType, ServerSelectionVie
     override func process(viewAction: ServerSelectionViewAction) async {
         switch viewAction {
         case .confirm:
+            if !state.bindings.slidingSyncProxyAddress.isEmpty {
+                ElementSettings.shared.slidingSyncProxyBaseURLString = state.bindings.slidingSyncProxyAddress
+            }
+            
             callback?(.confirm(homeserverAddress: state.bindings.homeserverAddress))
         case .dismiss:
             callback?(.dismiss)

ElementX/Sources/Screens/Authentication/ServerSelection/View/ServerSelectionScreen.swift

@@ -17,18 +17,8 @@
 import SwiftUI
 
 struct ServerSelectionScreen: View {
-    // MARK: - Properties
-    
-    // MARK: Private
-    
-    @FocusState var isTextFieldFocused: Bool
-    
-    // MARK: Public
-    
     @ObservedObject var context: ServerSelectionViewModel.Context
     
-    // MARK: Views
-    
     var body: some View {
         ScrollView {
             VStack(spacing: 0) {
@@ -69,8 +59,8 @@ struct ServerSelectionScreen: View {
     var serverForm: some View {
         VStack(alignment: .leading, spacing: 12) {
             TextField(ElementL10n.ftueAuthChooseServerEntryHint, text: $context.homeserverAddress)
-                .focused($isTextFieldFocused)
-                .textFieldStyle(.elementInput(footerText: context.viewState.footerMessage,
+                .textFieldStyle(.elementInput(labelText: ElementL10n.hsUrl,
+                                              footerText: context.viewState.footerMessage,
                                               isError: context.viewState.isShowingFooterError))
                 .keyboardType(.URL)
                 .autocapitalization(.none)
@@ -80,6 +70,17 @@ struct ServerSelectionScreen: View {
                 .onSubmit(submit)
                 .accessibilityIdentifier("addressTextField")
             
+            Divider()
+            
+            TextField(ElementL10n.ftueAuthChooseServerEntryHint, text: $context.slidingSyncProxyAddress)
+                .textFieldStyle(.elementInput(labelText: "Sliding sync proxy URL"))
+                .keyboardType(.URL)
+                .autocapitalization(.none)
+                .disableAutocorrection(true)
+                .submitLabel(.done)
+                .onSubmit(submit)
+                .accessibilityIdentifier("slidingSyncProxyAddressTextField")
+            
             Button(action: submit) {
                 Text(context.viewState.buttonTitle)
             }