fix: static member of Config declaring all languages supported by the application

added searching multiple things

Closes #82

See merge request cse1105/2025-2026/teams/csep-team-76!91

client/pom.xml

@@ -21,7 +21,13 @@
             <artifactId>commons</artifactId>
             <version>0.0.1-SNAPSHOT</version>
         </dependency>
-
+        <!-- Source: https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+            <version>2.0.17</version>
+            <scope>compile</scope>
+        </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>

client/src/main/java/client/Ingredient/IngredientController.java

@@ -23,7 +23,7 @@ public class IngredientController {
     private final RestTemplate restTemplate = new RestTemplate();  // Simplified REST client
 
     @FXML
-    private void handleDeleteIngredient(ActionEvent event) {
+    public void handleDeleteIngredient(ActionEvent event) {
         // Get selected ingredient
         Ingredient selectedIngredient = ingredientListView.getSelectionModel().getSelectedItem();
         if (selectedIngredient == null) {

client/src/main/java/client/MyModule.java

@@ -21,6 +21,11 @@ import client.scenes.nutrition.NutritionDetailsCtrl;
 import client.scenes.nutrition.NutritionViewCtrl;
 import client.scenes.recipe.IngredientListCtrl;
 import client.scenes.recipe.RecipeStepListCtrl;
+import client.scenes.shopping.ShoppingListCtrl;
+import client.scenes.shopping.ShoppingListNewItemPromptCtrl;
+import client.service.ShoppingListService;
+import client.service.ShoppingListServiceImpl;
+import client.service.ShoppingListViewModel;
 import client.utils.ConfigService;
 import client.utils.LocaleManager;
 import client.utils.server.ServerUtils;
@@ -57,6 +62,10 @@ public class MyModule implements Module {
         binder.bind(new TypeLiteral<WebSocketDataService<Long, Recipe>>() {}).toInstance(
                 new WebSocketDataService<>()
         );
+        binder.bind(ShoppingListNewItemPromptCtrl.class).in(Scopes.SINGLETON);
+        binder.bind(ShoppingListCtrl.class).in(Scopes.SINGLETON);
+        binder.bind(ShoppingListViewModel.class).toInstance(new ShoppingListViewModel());
+        binder.bind(ShoppingListService.class).to(ShoppingListServiceImpl.class);
         binder.bind(new TypeLiteral<WebSocketDataService<Long, Ingredient>>() {}).toInstance(
                 new WebSocketDataService<>()
         );

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;
@@ -27,10 +28,15 @@ 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);
+            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");
 
         var mainCtrl = INJECTOR.getInstance(MainCtrl.class);

client/src/main/java/client/exception/DuplicateIngredientException.java

@@ -0,0 +1,20 @@
+package client.exception;
+
+public class DuplicateIngredientException extends Exception{
+    private final String ingredientName;
+
+    public DuplicateIngredientException(String ingredientName){
+        super("An ingredient with name " + ingredientName + " already exists, please provide a different name");
+        this.ingredientName = ingredientName;
+    }
+
+    public  DuplicateIngredientException(String ingredientName, String message){
+        super(message);
+        this.ingredientName = ingredientName;
+    }
+
+    public String getIngredientName() {
+        return ingredientName;
+    }
+
+}

client/src/main/java/client/scenes/FoodpalApplicationCtrl.java

@@ -2,17 +2,17 @@ package client.scenes;
 
 
 import java.io.IOException;
-import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.Optional;
 import java.util.logging.Logger;
-import java.util.stream.Collectors;
 
+import client.UI;
 import client.exception.InvalidModificationException;
 import client.scenes.nutrition.NutritionViewCtrl;
 import client.scenes.recipe.RecipeDetailCtrl;
 
+import client.scenes.shopping.ShoppingListCtrl;
 import client.utils.Config;
 import client.utils.ConfigService;
 import client.utils.DefaultValueFactory;
@@ -21,7 +21,6 @@ import client.utils.LocaleManager;
 import client.utils.server.ServerUtils;
 import client.utils.WebSocketDataService;
 import client.utils.WebSocketUtils;
-import commons.Ingredient;
 import commons.Recipe;
 
 import commons.ws.Topics;
@@ -32,14 +31,20 @@ import commons.ws.messages.Message;
 import commons.ws.messages.UpdateRecipeMessage;
 import jakarta.inject.Inject;
 import javafx.application.Platform;
+import javafx.beans.property.ListProperty;
+import javafx.beans.property.SimpleListProperty;
+import javafx.collections.FXCollections;
+import javafx.collections.ListChangeListener;
 import javafx.fxml.FXML;
+import javafx.scene.Scene;
 import javafx.scene.control.Alert;
 import javafx.scene.control.Button;
 import javafx.scene.control.Label;
 import javafx.scene.control.ListCell;
 import javafx.scene.control.ListView;
-import javafx.scene.control.TextInputDialog;
 import javafx.scene.control.ToggleButton;
+import javafx.scene.paint.Color;
+import javafx.stage.Stage;
 import org.apache.commons.lang3.NotImplementedException;
 import org.apache.commons.lang3.tuple.ImmutablePair;
 import org.apache.commons.lang3.tuple.Pair;
@@ -65,8 +70,7 @@ public class FoodpalApplicationCtrl implements LocaleAware {
     @FXML
     public ListView<Recipe> recipeList;
 
-    @FXML
-    private ListView<Ingredient> ingredientListView;
+    private final ListProperty<Recipe> favouriteRecipeList = new SimpleListProperty<>();
 
     @FXML
     private Button addRecipeButton;
@@ -84,7 +88,8 @@ public class FoodpalApplicationCtrl implements LocaleAware {
     @FXML
     private ToggleButton favouritesOnlyToggle;
 
-    private List<Recipe> allRecipes = new ArrayList<>();
+    @FXML
+    private Button manageIngredientsButton;
 
     @FXML
     private Label updatedBadge;
@@ -200,6 +205,12 @@ public class FoodpalApplicationCtrl implements LocaleAware {
                 }   //gives star in front fav items
                 boolean fav = config.isFavourite(item.getId());
                 setText((fav ? "★ " : "") + item.getName());
+
+                if(fav){
+                    setTextFill(Color.BLUE);
+                }else{
+                    setTextFill(Color.BLACK);
+                }
             }
         });
         // When your selection changes, update details in the panel
@@ -277,6 +288,13 @@ public class FoodpalApplicationCtrl implements LocaleAware {
                 openSelectedRecipe();
             }
         });
+        recipeList.getItems().addListener((ListChangeListener.Change<? extends Recipe> c) -> {
+            favouriteRecipeList.set(
+                    FXCollections.observableList(
+                            recipeList.getItems().stream().filter(r -> config.isFavourite(r.getId())).toList()
+                    ));
+            System.out.println(favouriteRecipeList);
+        });
 
         this.initializeSearchBar();
         refresh();
@@ -290,6 +308,9 @@ public class FoodpalApplicationCtrl implements LocaleAware {
         removeRecipeButton.setText(getLocaleString("menu.button.remove.recipe"));
         cloneRecipeButton.setText(getLocaleString("menu.button.clone"));
         recipesLabel.setText(getLocaleString("menu.label.recipes"));
+
+        favouritesOnlyToggle.setText(getLocaleString("menu.button.favourites"));
+        manageIngredientsButton.setText(getLocaleString("menu.button.ingredients"));
     }
 
     @Override
@@ -312,8 +333,7 @@ public class FoodpalApplicationCtrl implements LocaleAware {
             logger.severe(msg);
             printError(msg);
         }
-
-        allRecipes = new ArrayList<>(recipes);
+        recipeList.getItems().setAll(recipes);
         applyRecipeFilterAndKeepSelection();
 
         showUpdatedBadge();
@@ -409,16 +429,20 @@ public class FoodpalApplicationCtrl implements LocaleAware {
     public void applyRecipeFilterAndKeepSelection() {
         Recipe selected = recipeList.getSelectionModel().getSelectedItem();
         Long selectedId = selected == null ? null : selected.getId();
-
-        List<Recipe> view = allRecipes;
+        List<Recipe> view = recipeList.getItems().stream().toList();
 
         if (favouritesOnlyToggle != null && favouritesOnlyToggle.isSelected()) {
-            view = allRecipes.stream()
-                    .filter(r -> config.isFavourite(r.getId()))
-                    .collect(Collectors.toList());
-        }
-
+            view = favouriteRecipeList.get();
             recipeList.getItems().setAll(view);
+        }
+        try {
+            if (favouritesOnlyToggle != null && !favouritesOnlyToggle.isSelected()) {
+                recipeList.getItems().setAll(server.getRecipes(config.getRecipeLanguages()));
+            }
+        }
+        catch (IOException | InterruptedException e) {
+            logger.severe(e.getMessage());
+        }
 
         // restore selection if possible
         if (selectedId != null) {
@@ -439,114 +463,6 @@ public class FoodpalApplicationCtrl implements LocaleAware {
         this.recipeDetailController.refreshFavouriteButton();
         this.recipeDetailController.setVisible(!recipeList.getItems().isEmpty());
     }
-
-    //Delete Ingredient button click
-    @FXML
-    private void handleDeleteIngredient() {
-        // Get selected ingredient
-        Ingredient selectedIngredient = ingredientListView.getSelectionModel().getSelectedItem();
-
-        if (selectedIngredient == null) {
-            // Show an error message if no ingredient is selected
-            showError("No ingredient selected", "Please select an ingredient to delete.");
-            return;
-        }
-
-        // Check if the ingredient is used in any recipe
-        checkIngredientUsage(selectedIngredient);
-    }
-
-    // Check if ingredient is used in any recipe before deleting
-    private void checkIngredientUsage(Ingredient ingredient) {
-        try {
-            long usageCount = server.getIngredientUsage(ingredient.getId());  // Check ingredient usage via ServerUtils
-
-            if (usageCount > 0) {
-                // If ingredient is used, show a warning dialog
-                showWarningDialog(ingredient, usageCount);
-            } else {
-                // If not used, delete
-                deleteIngredient(ingredient);
-            }
-        } catch (IOException | InterruptedException e) {
-            showError("Error", "Failed to check ingredient usage: " + e.getMessage());
-        }
-    }
-
-    private void deleteIngredient(Ingredient ingredient) {
-        try {
-            server.deleteIngredient(ingredient.getId());  // Call ServerUtils to delete the ingredient
-            showConfirmation("Success", "Ingredient '" + ingredient.getName() + "' has been deleted.");
-            refreshIngredientList();  // refresh the ingredient list
-        } catch (IOException | InterruptedException e) {
-            showError("Error", "Failed to delete ingredient: " + e.getMessage());
-        }
-    }
-
-    private void showWarningDialog(Ingredient ingredient, long usedInRecipes) {
-        Alert alert = new Alert(Alert.AlertType.WARNING);
-    }
-
-    private void showError(String title, String message) {
-        Alert alert = new Alert(Alert.AlertType.ERROR);
-        alert.setTitle(title);
-        alert.setHeaderText(null);
-        alert.setContentText(message);
-        alert.showAndWait();
-    }
-
-    private void showConfirmation(String title, String message) {
-        Alert alert = new Alert(Alert.AlertType.INFORMATION);
-        alert.setTitle(title);
-        alert.setHeaderText(null);
-        alert.setContentText(message);
-        alert.showAndWait();
-    }
-
-    private void refreshIngredientList() {
-        // Refresh
-        ingredientListView.getItems().clear();
-
-    }
-
-
-    @FXML
-    private void handleAddIngredient() {
-        //ask the user for the ingredient name
-        TextInputDialog dialog = new TextInputDialog();
-        dialog.setTitle("Add Ingredient");
-        dialog.setHeaderText("Enter the ingredient name:");
-        dialog.setContentText("Ingredient:");
-
-        // Wait for the user to enter a value
-        Optional<String> result = dialog.showAndWait();
-
-        result.ifPresent(name -> {
-            // Create a new Ingredient object
-            Ingredient newIngredient = new Ingredient();
-            newIngredient.setName(name);
-
-            // Add the new ingredient to the ListView
-            ingredientListView.getItems().add(newIngredient);
-        });
-    }
-
-    // display ingredient name
-    @FXML
-    private void initializeIngredients() {
-        ingredientListView.setCellFactory(list -> new ListCell<Ingredient>() {
-            @Override
-            protected void updateItem(Ingredient item, boolean empty) {
-                super.updateItem(item, empty);
-                if (empty || item == null) {
-                    setText(null);
-                } else {
-                    setText(item.getName());  // Display the ingredient name in the ListView
-                }
-            }
-        });
-    }
-
     @FXML
     private void openIngredientsPopup() {
         try {
@@ -558,7 +474,7 @@ public class FoodpalApplicationCtrl implements LocaleAware {
             var root = pair.getValue();
 
             var stage = new javafx.stage.Stage();
-            stage.setTitle("Nutrition values view");
+            stage.setTitle(getLocaleString("menu.ingredients.title"));
             stage.initModality(javafx.stage.Modality.APPLICATION_MODAL);
             stage.setScene(new javafx.scene.Scene(root));
             stage.showAndWait();
@@ -598,6 +514,14 @@ public class FoodpalApplicationCtrl implements LocaleAware {
         updatedBadgeTimer.playFromStart();
     }
 
+    public void openShoppingListWindow() throws IOException {
+        var root = UI.getFXML().load(ShoppingListCtrl.class, "client", "scenes", "shopping", "ShoppingList.fxml");
+        Stage stage = new Stage();
+        stage.setTitle(this.getLocaleString("menu.shopping.title"));
+        stage.setScene(new Scene(root.getValue()));
+        stage.show();
+    }
+
 }
 
 

client/src/main/java/client/scenes/Ingredient/IngredientListCtrl.java

@@ -1,11 +1,17 @@
 package client.scenes.Ingredient;
 
+import client.exception.DuplicateIngredientException;
 import client.scenes.nutrition.NutritionDetailsCtrl;
+import client.utils.LocaleAware;
+import client.utils.LocaleManager;
 import client.utils.server.ServerUtils;
 import commons.Ingredient;
 import jakarta.inject.Inject;
 import javafx.fxml.FXML;
+
 import javafx.scene.control.Alert;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
 import javafx.scene.control.ListCell;
 import javafx.scene.control.ListView;
 import javafx.scene.control.TextInputDialog;
@@ -19,10 +25,18 @@ import java.util.logging.Logger;
 //TODO and check for capital letter milk and MILK are seen as different
 
 
-public class IngredientListCtrl {
-
+public class IngredientListCtrl implements LocaleAware {
     private final ServerUtils server;
+    private final LocaleManager localeManager;
     private final Logger logger = Logger.getLogger(IngredientListCtrl.class.getName());
+
+    @FXML
+    public Label ingredientsLabel;
+    public Button addButton;
+    public Button refreshButton;
+    public Button deleteButton;
+    public Button closeButton;
+
     @FXML
     private ListView<Ingredient> ingredientListView;
     @FXML
@@ -31,14 +45,30 @@ public class IngredientListCtrl {
     @Inject
     public IngredientListCtrl(
             ServerUtils server,
+            LocaleManager localeManager,
             NutritionDetailsCtrl nutritionDetailsCtrl
     ) {
         this.server = server;
+        this.localeManager = localeManager;
         this.nutritionDetailsCtrl = nutritionDetailsCtrl;
     }
 
-    @FXML
-    public void initialize() {
+    @Override
+    public void updateText() {
+        ingredientsLabel.setText(getLocaleString("menu.label.ingredients"));
+        addButton.setText(getLocaleString("menu.button.add"));
+        refreshButton.setText(getLocaleString("menu.button.refresh"));
+        deleteButton.setText(getLocaleString("menu.button.delete"));
+        closeButton.setText(getLocaleString("menu.button.close"));
+    }
+
+    @Override
+    public LocaleManager getLocaleManager() {
+        return this.localeManager;
+    }
+
+    @Override
+    public void initializeComponents() {
         ingredientListView.setCellFactory(list -> new ListCell<>() {
             @Override
             protected void updateItem(Ingredient item, boolean empty) {
@@ -60,6 +90,7 @@ public class IngredientListCtrl {
 
         refresh();
     }
+
     @FXML
     private void addIngredient() {
         TextInputDialog dialog = new TextInputDialog();
@@ -83,10 +114,11 @@ public class IngredientListCtrl {
             refresh();                      // reload list from server
         } catch (IOException | InterruptedException e) {
             showError("Failed to create ingredient: " + e.getMessage());
+        } catch (DuplicateIngredientException e) {
+            throw new RuntimeException(e);
         }
     }
 
-
     @FXML
     private void refresh() {
         try {

client/src/main/java/client/scenes/LangSelectMenuCtrl.java

@@ -1,5 +1,6 @@
 package client.scenes;
 
+import client.utils.Config;
 import client.utils.LocaleAware;
 import client.utils.LocaleManager;
 import com.google.inject.Inject;
@@ -41,11 +42,12 @@ public class LangSelectMenuCtrl implements LocaleAware {
         String lang = langSelectMenu.getSelectionModel().getSelectedItem();
         logger.info("Switching locale to " + lang);
         manager.setLocale(Locale.of(lang));
+        initializeComponents();
     }
 
     @Override
     public void initializeComponents() {
-        langSelectMenu.getItems().setAll("en", "pl", "nl", "tok", "tr");
+        langSelectMenu.getItems().setAll(Config.languages);
         langSelectMenu.setValue(manager.getLocale().getLanguage());
         langSelectMenu.setConverter(new StringConverter<String>() {
             @Override

client/src/main/java/client/scenes/LanguageFilterCtrl.java

@@ -1,5 +1,6 @@
 package client.scenes;
 
+import client.utils.Config;
 import client.utils.ConfigService;
 import client.utils.LocaleAware;
 import client.utils.LocaleManager;
@@ -54,7 +55,7 @@ public class LanguageFilterCtrl implements LocaleAware {
     public void initializeComponents() {
         var items = this.langFilterMenu.getItems();
 
-        final List<String> languages = List.of("en", "nl", "pl", "tok", "tr");
+        final List<String> languages = List.of(Config.languages);
         this.selectedLanguages = this.configService.getConfig().getRecipeLanguages();
         this.updateMenuButtonDisplay();
 

client/src/main/java/client/scenes/SearchBarCtrl.java

@@ -10,11 +10,15 @@ import javafx.animation.PauseTransition;
 import javafx.concurrent.Task;
 import javafx.fxml.FXML;
 import javafx.scene.control.TextField;
+import javafx.scene.input.KeyCode;
 import javafx.util.Duration;
 
 import java.io.IOException;
+import java.util.Arrays;
 import java.util.List;
+import java.util.Locale;
 import java.util.function.Consumer;
+import java.util.stream.Collectors;
 
 /**
  * Controller for the search bar component.
@@ -99,7 +103,11 @@ public class SearchBarCtrl implements LocaleAware {
         currentSearchTask = new Task<>() {
             @Override
             protected List<Recipe> call() throws IOException, InterruptedException {
-                return serverUtils.getRecipesFiltered(filter, configService.getConfig().getRecipeLanguages());
+                var recipes = serverUtils.getRecipesFiltered(
+                        "",
+                        configService.getConfig().getRecipeLanguages()
+                );
+                return applyMultiTermAndFilter(recipes, filter);
             }
         };
 
@@ -146,8 +154,61 @@ public class SearchBarCtrl implements LocaleAware {
         });
 
         this.searchField.setOnKeyReleased(event -> {
+            if (event.getCode() == KeyCode.ESCAPE) {
+                searchField.clear();
+                this.onSearch();
+                return;
+            }
             // This cancels the current debounce timer and restarts it.
             this.searchDebounce.playFromStart();
         });
     }
+    private List<Recipe> applyMultiTermAndFilter(List<Recipe> recipes, String query) {
+        if (recipes == null) {
+            return List.of();
+        }
+        if (query == null || query.isBlank()) {
+            return recipes;
+        }
+
+        var tokens = Arrays.stream(query.toLowerCase(Locale.ROOT).split("[\\s,]+"))
+                .map(String::trim)
+                .filter(s -> !s.isBlank())
+                .filter(s -> !s.equals("and"))
+                .toList();
+
+        if (tokens.isEmpty()) {
+            return recipes;
+        }
+
+        return recipes.stream()
+                .filter(r -> {
+                    var sb = new StringBuilder();
+
+                    if (r.getName() != null) {
+                        sb.append(r.getName()).append(' ');
+                    }
+
+                    if (r.getIngredients() != null) {
+                        r.getIngredients().forEach(i -> {
+                            if (i != null) {
+                                sb.append(i).append(' ');
+                            }
+                        });
+                    }
+
+                    if (r.getPreparationSteps() != null) {
+                        r.getPreparationSteps().forEach(s -> {
+                            if (s != null) {
+                                sb.append(s).append(' ');
+                            }
+                        });
+                    }
+
+                    var haystack = sb.toString().toLowerCase(Locale.ROOT);
+                    return tokens.stream().allMatch(haystack::contains);
+                })
+                .collect(Collectors.toList());
+    }
+
 }

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/scenes/nutrition/NutritionDetailsCtrl.java

@@ -66,7 +66,7 @@ public class NutritionDetailsCtrl implements LocaleAware {
             this.proteinInputElement.textProperty().bindBidirectional(vm.proteinProperty(), new NumberStringConverter());
             this.carbInputElement.textProperty().bindBidirectional(vm.carbsProperty(), new NumberStringConverter());
             this.estimatedKcalLabel.textProperty().bind(Bindings.createStringBinding(
-                    () -> String.format("Estimated energy value: %.1f", vm.getKcal()), vm.kcalProperty()
+                    () -> String.format("Estimated energy value: %.1f kcal/100g", vm.getKcal()), vm.kcalProperty()
             ));
         });
         this.nutritionValueContainer.addEventHandler(KeyEvent.KEY_RELEASED, event -> {

client/src/main/java/client/scenes/recipe/IngredientListCtrl.java

@@ -8,6 +8,7 @@ import com.google.inject.Inject;
 import commons.FormalIngredient;
 import commons.Recipe;
 import java.util.ArrayList;
+import java.util.Comparator;
 import java.util.List;
 import java.util.function.Consumer;
 
@@ -78,7 +79,13 @@ public class IngredientListCtrl implements LocaleAware {
         if (recipe == null) {
             this.ingredients = FXCollections.observableArrayList(new ArrayList<>());
         } else {
-            List<RecipeIngredient> ingredientList = recipe.getIngredients();
+            List<RecipeIngredient> ingredientList = recipe
+                    .getIngredients()
+                    .stream()
+                    .sorted(Comparator.comparing(ingredient -> ingredient
+                                    .getIngredient()
+                                    .getName()))
+                    .toList();
             this.ingredients = FXCollections.observableArrayList(ingredientList);
         }
 

client/src/main/java/client/scenes/recipe/IngredientsPopupCtrl.java

@@ -1,6 +1,7 @@
 package client.scenes.recipe;
 
 import client.utils.server.ServerUtils;
+import client.exception.DuplicateIngredientException;
 import commons.Ingredient;
 import jakarta.inject.Inject;
 import javafx.fxml.FXML;
@@ -67,8 +68,15 @@ public class IngredientsPopupCtrl {
             server.createIngredient(name);  // calls POST /api/ingredients
             refresh();                      // reload list from server
         } catch (IOException | InterruptedException e) {
+
             showError("Failed to create ingredient: " + e.getMessage());
+        } catch (DuplicateIngredientException e) {
+            showError("An ingredient with the name " + name + " already exists." +
+                    " Please provide a different name."); //checks if error received has the DUPLICATE string and creates a showError instance with an appropriate error message and description
+
         }
+
+
     }
 
 

client/src/main/java/client/scenes/recipe/RecipeDetailCtrl.java

@@ -2,6 +2,7 @@ package client.scenes.recipe;
 
 import client.exception.UpdateException;
 import client.scenes.FoodpalApplicationCtrl;
+import client.service.ShoppingListService;
 import client.utils.Config;
 import client.utils.ConfigService;
 import client.utils.LocaleAware;
@@ -10,6 +11,7 @@ import client.utils.PrintExportService;
 import client.utils.server.ServerUtils;
 import client.utils.WebSocketDataService;
 import com.google.inject.Inject;
+import commons.FormalIngredient;
 import commons.Recipe;
 
 import java.io.File;
@@ -18,6 +20,9 @@ import java.nio.file.Path;
 import java.util.Optional;
 import java.util.function.BiConsumer;
 import java.util.function.Consumer;
+
+import javafx.beans.binding.Bindings;
+import javafx.event.ActionEvent;
 import javafx.fxml.FXML;
 import javafx.scene.control.Button;
 import javafx.scene.control.ComboBox;
@@ -44,8 +49,12 @@ public class RecipeDetailCtrl implements LocaleAware {
     private final FoodpalApplicationCtrl appCtrl;
     private final ConfigService configService;
     private final WebSocketDataService<Long, Recipe> webSocketDataService;
+    private final ShoppingListService shoppingListService;
 
     public Spinner<Double> scaleSpinner;
+    public Label inferredKcalLabel;
+    public Spinner<Integer> servingsSpinner;
+    public Label inferredServeSizeLabel;
 
     @FXML
     private IngredientListCtrl ingredientListController;
@@ -62,12 +71,14 @@ public class RecipeDetailCtrl implements LocaleAware {
             ServerUtils server,
             FoodpalApplicationCtrl appCtrl,
             ConfigService configService,
+            ShoppingListService listService,
             WebSocketDataService<Long, Recipe> webSocketDataService) {
         this.localeManager = localeManager;
         this.server = server;
         this.appCtrl = appCtrl;
         this.configService = configService;
         this.webSocketDataService = webSocketDataService;
+        this.shoppingListService = listService;
     }
 
     @FXML
@@ -154,12 +165,20 @@ public class RecipeDetailCtrl implements LocaleAware {
 
         // If there is a scale
         // Prevents issues from first startup
-        if (scaleSpinner.getValue() != null) {
+        if (scaleSpinner.getValue() != null && servingsSpinner.getValue() != null) {
             Double scale = scaleSpinner.getValue();
-
             // see impl. creates a scaled context for the recipe such that its non-scaled value is kept as a reference.
             this.recipeView = new ScalableRecipeView(recipe, scale);
-
+            // TODO i18n
+            inferredKcalLabel.textProperty().bind(Bindings.createStringBinding(() ->
+                    String.format("Inferred %.1f kcal/100g for this recipe",
+                            Double.isNaN(this.recipeView.scaledKcalProperty().get()) ?
+                                    0.0 : this.recipeView.scaledKcalProperty().get())
+                    , this.recipeView.scaledKcalProperty()));
+            recipeView.servingsProperty().set(servingsSpinner.getValue());
+            inferredServeSizeLabel.textProperty().bind(Bindings.createStringBinding(
+                    () -> String.format("Inferred size per serving: %.1f g", recipeView.servingSizeProperty().get()),
+                    recipeView.servingSizeProperty()));
             // expose the scaled view to list controllers
             this.ingredientListController.refetchFromRecipe(this.recipeView.getScaled());
             this.stepListController.refetchFromRecipe(this.recipeView.getScaled());
@@ -386,7 +405,7 @@ public class RecipeDetailCtrl implements LocaleAware {
     public void initializeComponents() {
         initStepsIngredientsList();
         // creates a new scale spinner with an arbitrary max scale
-        scaleSpinner.setValueFactory(new SpinnerValueFactory.DoubleSpinnerValueFactory(0, Double.MAX_VALUE, 1));
+        scaleSpinner.setValueFactory(new SpinnerValueFactory.DoubleSpinnerValueFactory(1, Double.MAX_VALUE, 1));
         scaleSpinner.setEditable(true);
         scaleSpinner.valueProperty().addListener((observable, oldValue, newValue) -> {
             if (newValue == null) {
@@ -395,6 +414,23 @@ public class RecipeDetailCtrl implements LocaleAware {
             // triggers a UI update each time the spinner changes to a different value.
             setCurrentlyViewedRecipe(recipe);
         });
-        langSelector.getItems().addAll("en", "nl", "pl", "tok");
+        servingsSpinner.setValueFactory(new SpinnerValueFactory.IntegerSpinnerValueFactory(1, Integer.MAX_VALUE, 1));
+        servingsSpinner.setEditable(true);
+        servingsSpinner.valueProperty().addListener((observable, oldValue, newValue) -> {
+            if (newValue == null) {
+                return;
+            }
+            setCurrentlyViewedRecipe(recipe);
+        });
+        langSelector.getItems().addAll(Config.languages);
+    }
+
+    public void handleAddAllToShoppingList(ActionEvent actionEvent) {
+        System.out.println("handleAddAllToShoppingList");
+        // TODO BACKLOG Add overview screen
+        recipe.getIngredients().stream()
+                .filter(x -> x.getClass().equals(FormalIngredient.class))
+                .map(FormalIngredient.class::cast)
+                .forEach(x -> shoppingListService.putIngredient(x, recipe));
     }
 }

client/src/main/java/client/scenes/recipe/ScalableRecipeView.java

@@ -4,14 +4,19 @@ import commons.Recipe;
 import javafx.beans.binding.Bindings;
 import javafx.beans.binding.ObjectBinding;
 import javafx.beans.property.DoubleProperty;
+import javafx.beans.property.IntegerProperty;
 import javafx.beans.property.ObjectProperty;
 import javafx.beans.property.SimpleDoubleProperty;
+import javafx.beans.property.SimpleIntegerProperty;
 import javafx.beans.property.SimpleObjectProperty;
 
 public class ScalableRecipeView {
     private final ObjectProperty<Recipe> recipe = new SimpleObjectProperty<>();
     private final ObjectProperty<Recipe> scaled = new SimpleObjectProperty<>();
     private final DoubleProperty scale = new SimpleDoubleProperty();
+    private final DoubleProperty scaledKcal = new SimpleDoubleProperty();
+    private final IntegerProperty servings = new SimpleIntegerProperty();
+    private final DoubleProperty servingSize = new SimpleDoubleProperty();
     public ScalableRecipeView(
             Recipe recipe,
             Double scale
@@ -22,10 +27,11 @@ public class ScalableRecipeView {
                 () -> Recipe.getScaled(this.recipe.get(), this.scale.get()),
                 this.recipe, this.scale);
         this.scaled.bind(binding);
-    }
-
-    public double getScale() {
-        return scale.get();
+        this.scaledKcal.bind(Bindings.createDoubleBinding(() -> this.scaled.get().kcal(), this.scaled));
+        this.servingSize.bind(Bindings.createDoubleBinding(
+                () -> this.scaled.get().weight() * ( 1.0 / this.servings.get()),
+                this.servings)
+        );
     }
 
     public Recipe getRecipe() {
@@ -36,15 +42,14 @@ public class ScalableRecipeView {
         return scaled.get();
     }
 
-    public DoubleProperty scaleProperty() {
-        return scale;
+    public DoubleProperty scaledKcalProperty() {
+        return scaledKcal;
     }
 
-    public ObjectProperty<Recipe> scaledProperty() {
-        return scaled;
+    public IntegerProperty servingsProperty() {
+        return servings;
     }
-
-    public ObjectProperty<Recipe> recipeProperty() {
-        return recipe;
+    public DoubleProperty servingSizeProperty() {
+        return servingSize;
     }
 }

client/src/main/java/client/scenes/shopping/ShoppingListCell.java

@@ -0,0 +1,67 @@
+package client.scenes.shopping;
+
+import client.scenes.recipe.OrderedEditableListCell;
+import commons.FormalIngredient;
+import javafx.scene.Node;
+import javafx.scene.control.Label;
+import javafx.scene.control.Spinner;
+import javafx.scene.control.SpinnerValueFactory;
+import javafx.scene.input.KeyCode;
+import javafx.scene.input.KeyEvent;
+import javafx.scene.layout.HBox;
+import javafx.util.Pair;
+
+import java.util.Optional;
+
+public class ShoppingListCell extends OrderedEditableListCell<Pair<FormalIngredient, Optional<String>>> {
+    private Node makeEditor() {
+        HBox editor = new HBox();
+        Spinner<Double> amountInput = new Spinner<>();
+        FormalIngredient ingredient = getItem().getKey();
+        amountInput.setEditable(true);
+        amountInput.setValueFactory(new SpinnerValueFactory.DoubleSpinnerValueFactory(0, Double.MAX_VALUE, ingredient.getAmount()));
+        Label textLabel = new Label(getItem().getKey().getUnitSuffix() + " of " + getItem().getKey().getIngredient().getName());
+        editor.getChildren().addAll(amountInput, textLabel);
+        editor.addEventHandler(KeyEvent.KEY_RELEASED, e -> {
+            if (e.getCode() != KeyCode.ENTER) {
+                return;
+            }
+            Pair<FormalIngredient, Optional<String>> pair = getItem();
+            pair.getKey().setAmount(amountInput.getValue());
+            commitEdit(pair);
+        });
+        return editor;
+    }
+    @Override
+    public void startEdit() {
+        super.startEdit();
+        this.setText("");
+        this.setGraphic(makeEditor());
+    }
+    @Override
+    protected void updateItem(Pair<FormalIngredient, Optional<String>> item, boolean empty) {
+        super.updateItem(item, empty);
+
+        if (empty) {
+            this.setText("");
+            return;
+        }
+
+        String display = item.getKey().toString() +
+                item.getValue().map(recipe -> {
+                    return " (" + recipe + ")";
+                }).orElse("");
+
+        this.setText(display);
+    }
+    @Override
+    public void cancelEdit() {
+        super.cancelEdit();
+    }
+
+    @Override
+    public void commitEdit(Pair<FormalIngredient, Optional<String>> newValue) {
+        super.commitEdit(newValue);
+    }
+
+}

client/src/main/java/client/scenes/shopping/ShoppingListCtrl.java

@@ -0,0 +1,81 @@
+package client.scenes.shopping;
+
+import client.UI;
+import client.service.ShoppingListService;
+import client.utils.LocaleAware;
+import client.utils.LocaleManager;
+import com.google.inject.Inject;
+import commons.FormalIngredient;
+import javafx.event.ActionEvent;
+import javafx.fxml.FXML;
+import javafx.scene.Node;
+import javafx.scene.Parent;
+import javafx.scene.Scene;
+import javafx.scene.control.ListView;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+import javafx.util.Pair;
+
+import java.util.Optional;
+
+public class ShoppingListCtrl implements LocaleAware {
+    ShoppingListService shopping;
+
+    LocaleManager localeManager;
+
+    @FXML
+    private ListView<Pair<FormalIngredient, Optional<String>>> shoppingListView;
+    @Inject
+    public ShoppingListCtrl(
+            ShoppingListService shopping,
+            LocaleManager localeManager
+    ) {
+        this.shopping = shopping;
+        this.localeManager = localeManager;
+    }
+
+    @Override
+    public void updateText() {
+
+    }
+
+    @Override
+    public LocaleManager getLocaleManager() {
+        return this.localeManager;
+    }
+
+    public void initializeComponents() {
+        this.shoppingListView.setEditable(true);
+        this.shoppingListView.setCellFactory(l -> new ShoppingListCell());
+        this.shoppingListView.getItems().setAll(
+                this.shopping.getItems()
+        );
+    }
+    private void refreshList() {
+        this.shoppingListView.getItems().setAll(
+                this.shopping.getItems()
+        );
+    }
+
+    public void handleAddItem(ActionEvent actionEvent) {
+        Stage stage = new Stage();
+        Pair<ShoppingListNewItemPromptCtrl, Parent> root = UI.getFXML().load(ShoppingListNewItemPromptCtrl.class,
+                "client", "scenes", "shopping", "ShoppingListItemAddModal.fxml");
+        root.getKey().setNewValueConsumer(fi -> {
+            this.shopping.putIngredient(fi);
+            refreshList();
+        });
+        stage.setScene(new Scene(root.getValue()));
+        stage.setTitle("My modal window");
+        stage.initModality(Modality.WINDOW_MODAL);
+        stage.initOwner(
+                ((Node)actionEvent.getSource()).getScene().getWindow() );
+        stage.show();
+    }
+
+    public void handleRemoveItem(ActionEvent actionEvent) {
+        var x = this.shoppingListView.getSelectionModel().getSelectedItem();
+        this.shopping.getItems().remove(x);
+        refreshList();
+    }
+}

client/src/main/java/client/scenes/shopping/ShoppingListNewItemPromptCtrl.java

@@ -0,0 +1,96 @@
+package client.scenes.shopping;
+
+import client.utils.LocaleAware;
+import client.utils.LocaleManager;
+import client.utils.server.ServerUtils;
+import com.google.inject.Inject;
+import commons.FormalIngredient;
+import commons.Ingredient;
+import commons.Unit;
+import javafx.beans.property.ObjectProperty;
+import javafx.beans.property.SimpleObjectProperty;
+import javafx.event.ActionEvent;
+import javafx.scene.control.MenuButton;
+import javafx.scene.control.MenuItem;
+import javafx.scene.control.Spinner;
+import javafx.scene.control.SpinnerValueFactory;
+import javafx.stage.Stage;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+public class ShoppingListNewItemPromptCtrl implements LocaleAware {
+    public MenuButton ingredientSelection;
+    private final ObjectProperty<Ingredient> selected = new SimpleObjectProperty<>();
+    private final ObjectProperty<Unit> selectedUnit = new SimpleObjectProperty<>();
+    private final ServerUtils server;
+    private final LocaleManager localeManager;
+    private Consumer<FormalIngredient> newValueConsumer;
+    public MenuButton unitSelect;
+    public Spinner<Double> amountSelect;
+
+    @Inject
+    public ShoppingListNewItemPromptCtrl(ServerUtils server, LocaleManager localeManager) {
+        this.server = server;
+        this.localeManager = localeManager;
+    }
+
+    public void setNewValueConsumer(Consumer<FormalIngredient> consumer) {
+        this.newValueConsumer = consumer;
+    }
+
+    public void confirmAdd(ActionEvent actionEvent) {
+        if (selected.get() == null || selectedUnit.get() == null) {
+            System.err.println("You must select both an ingredient and an unit");
+            return;
+        }
+        FormalIngredient fi = new FormalIngredient(selected.get(), amountSelect.getValue(), selectedUnit.get().suffix);
+        newValueConsumer.accept(fi);
+        Stage stage = (Stage) ingredientSelection.getScene().getWindow();
+        stage.close();
+    }
+
+    public void cancelAdd(ActionEvent actionEvent) {
+    }
+    private <T> void makeMenuItems(
+            MenuButton menu,
+            Iterable<T> items,
+            Function<T, String> labelMapper,
+            Consumer<T> onSelect) {
+        // Iterates over the list of items and applies the label and onSelect handlers.
+        for (T item : items) {
+            MenuItem mi = new MenuItem();
+            mi.setText(labelMapper.apply(item));
+            mi.setOnAction(_ -> {
+                menu.setText(labelMapper.apply(item));
+                onSelect.accept(item);
+            });
+            menu.getItems().add(mi);
+        }
+    }
+    @Override
+    public void updateText() {
+
+    }
+    @Override
+    public void initializeComponents() {
+        try {
+            amountSelect.setValueFactory(
+                    new SpinnerValueFactory.DoubleSpinnerValueFactory(0, Double.MAX_VALUE, 0));
+            amountSelect.setEditable(true);
+            makeMenuItems(ingredientSelection, server.getIngredients(), Ingredient::getName, selected::set);
+            makeMenuItems(unitSelect,
+                    Arrays.stream(Unit.values()).filter(u -> u.formal).toList(),
+                    Unit::toString, selectedUnit::set);
+        } catch (IOException | InterruptedException e) {
+            System.err.println(e.getMessage());
+        }
+    }
+
+    @Override
+    public LocaleManager getLocaleManager() {
+        return localeManager;
+    }
+}

client/src/main/java/client/service/NonFunctionalShoppingListService.java

@@ -0,0 +1,62 @@
+package client.service;
+
+import com.google.inject.Inject;
+import commons.FormalIngredient;
+import commons.Recipe;
+import javafx.util.Pair;
+import org.apache.commons.lang3.NotImplementedException;
+
+import java.util.List;
+import java.util.Optional;
+
+public class NonFunctionalShoppingListService extends ShoppingListService {
+    @Inject
+    public NonFunctionalShoppingListService(ShoppingListViewModel viewModel) {
+        super(viewModel);
+    }
+
+    @Override
+    public void putIngredient(FormalIngredient ingredient) {
+        throw new NotImplementedException();
+    }
+
+    @Override
+    public void putIngredient(FormalIngredient ingredient, Recipe recipe) {
+        throw new NotImplementedException();
+    }
+
+    @Override
+    public void putIngredient(FormalIngredient ingredient, String recipeName) {
+        throw new NotImplementedException();
+    }
+
+    @Override
+    public void putArbitraryItem(String name) {
+        throw new NotImplementedException();
+    }
+
+    @Override
+    public FormalIngredient purgeIngredient(Long id) {
+        throw new NotImplementedException();
+    }
+
+    @Override
+    public FormalIngredient purgeIngredient(String ingredientName) {
+        throw new NotImplementedException();
+    }
+
+    @Override
+    public void reset() {
+        throw new NotImplementedException();
+    }
+
+    @Override
+    public List<Pair<FormalIngredient, Optional<String>>> getItems() {
+        throw new NotImplementedException();
+    }
+
+    @Override
+    public String makePrintable() {
+        throw new NotImplementedException();
+    }
+}