added a Dialog sequence for when the server is not up, which was previously just a log msg. Now the user gets to provide their own server.

client/src/main/java/client/UI.java

@@ -2,6 +2,7 @@ package client;
 
 import client.scenes.FoodpalApplicationCtrl;
 import client.scenes.MainCtrl;
+import client.scenes.ServerConnectionDialogCtrl;
 import client.utils.server.ServerUtils;
 import com.google.inject.Injector;
 import javafx.application.Application;
@@ -27,9 +28,14 @@ public class UI extends Application {
 
         var serverUtils = INJECTOR.getInstance(ServerUtils.class);
         if (!serverUtils.isServerAvailable()) {
-            var msg = "Server needs to be started before the client, but it does not seem to be available. Shutting down.";
-            System.err.println(msg);
-            return;
+            var connectionHandler = INJECTOR.getInstance(ServerConnectionDialogCtrl.class);
+            boolean serverConnected = connectionHandler.promptForURL();
+
+            if(!serverConnected){
+                var msg = "User Cancelled Server connection. Shutting down";
+                System.err.print(msg);
+                return;
+            }
         }
         var foodpal = FXML.load(FoodpalApplicationCtrl.class, "client", "scenes", "FoodpalApplication.fxml");
 

client/src/main/java/client/scenes/ServerConnectionDialogCtrl.java

@@ -0,0 +1,94 @@
+package client.scenes;
+
+
+import client.utils.ConfigService;
+import client.utils.server.ServerUtils;
+import com.google.inject.Inject;
+import javafx.scene.control.Alert;
+import javafx.scene.control.ButtonType;
+import javafx.scene.control.TextInputDialog;
+
+import java.util.Optional;
+
+
+public class ServerConnectionDialogCtrl {
+
+    private final ConfigService configService;
+    private final ServerUtils serverUtils;
+
+
+
+    @Inject
+    public ServerConnectionDialogCtrl(ConfigService configService, ServerUtils serverUtils) {
+        this.configService = configService;
+        this.serverUtils = serverUtils;
+
+    }
+
+    /**
+     *
+     * @return a boolean for if the user got connected to server or
+     */
+    public boolean promptForURL(){
+        Alert error = new Alert(Alert.AlertType.ERROR);     //creates an error alert
+        error.setTitle("Server is Unavailable");
+        error.setHeaderText("Unable to connect to Server");
+        error.setContentText("The server at " + configService.getConfig().getServerUrl()
+                + " is not available\n\n Would you like to try a different Server URL?");
+
+        error.getButtonTypes().setAll(ButtonType.YES, ButtonType.NO);
+        Optional<ButtonType> userChoice = error.showAndWait();  //asks if user wants to input server URL
+
+        if(userChoice.isEmpty() || userChoice.get() == ButtonType.NO){
+            return false;
+        }
+
+        while(true){            // Keeps asking the user until either a valid url is provided or the user exits
+            TextInputDialog dialog =
+                    new TextInputDialog(configService.getConfig().getServerUrl());
+            dialog.setTitle("Enter new server URL");
+            dialog.setContentText("Server URL:");
+            Optional<String> userRes = dialog.showAndWait();
+            if(userRes.isEmpty()){
+                return false;   //user cancelled the operation
+            }
+            String newServer = userRes.get().trim();
+
+            if(newServer.isEmpty()){
+                Alert alert = new Alert(Alert.AlertType.WARNING);
+                alert.setTitle("Invalid Input");
+                alert.setHeaderText("Invalid server URL");
+                alert.setContentText("Please enter a valid URL");
+                alert.showAndWait();
+                continue;
+            }
+            configService.getConfig().setServerUrl(newServer);
+            if(serverUtils.isServerAvailable()){
+                configService.save();
+                Alert success = new Alert(Alert.AlertType.INFORMATION);
+                success.setTitle("Success");
+                success.setHeaderText("Connected to Server");
+                success.setContentText("Successfully connected to the server!");
+                success.showAndWait();
+                return true;
+            }
+            else{
+                Alert retry = new Alert(Alert.AlertType.ERROR);
+                retry.setTitle("Failed");
+                retry.setHeaderText("Failed to connect to Server");
+                retry.setContentText("Would you like to try another URL?");
+                retry.getButtonTypes().setAll(ButtonType.YES, ButtonType.NO);
+                Optional<ButtonType> result = retry.showAndWait();
+                if(result.isEmpty() || result.get() == ButtonType.NO){
+                    return false;
+                }
+
+            }
+
+        }
+    }
+
+
+
+
+}

client/src/main/java/client/utils/server/ServerUtils.java

@@ -7,13 +7,11 @@ import com.google.inject.Inject;
 import commons.Ingredient;
 import commons.Recipe;
 import commons.RecipeIngredient;
-import jakarta.ws.rs.ProcessingException;
 import jakarta.ws.rs.client.ClientBuilder;
 import org.glassfish.jersey.client.ClientConfig;
 
 
 import java.io.IOException;
-import java.net.ConnectException;
 import java.net.http.HttpClient;
 import java.net.http.HttpRequest;
 import java.net.http.HttpResponse;
@@ -171,10 +169,9 @@ public class ServerUtils {
                     .target(this.endpoints.baseUrl()) //
                     .request(APPLICATION_JSON) //
                     .get();
-        } catch (ProcessingException e) {
-            if (e.getCause() instanceof ConnectException) {
-                return false;
-            }
+        }
+        catch(Exception e){
+            return false;   //any exception caught will return false, not just processing exception.
         }
         return true;
     }