feat: pie chart for nutrients

client/src/main/java/client/scenes/nutrition/NutritionPieChartCtrl.java

@@ -0,0 +1,210 @@
+package client.scenes.nutrition;
+
+import client.utils.LocaleAware;
+import client.utils.LocaleManager;
+import com.google.inject.Inject;
+import commons.FormalIngredient;
+import commons.Ingredient;
+import commons.Recipe;
+import commons.VagueIngredient;
+import javafx.fxml.FXML;
+import javafx.scene.chart.PieChart;
+
+import java.util.List;
+import java.util.Objects;
+import java.util.logging.Logger;
+
+public class NutritionPieChartCtrl implements LocaleAware {
+    /**
+     * Nutrition info for a recipe or an ingredient.
+     *
+     * @param protein The protein this recipe/ingredient has
+     * @param fat The fat this recipe/ingredient has
+     * @param carbs The carbs this recipe/ingredient has
+     */
+    private record CompleteNutritionInfo(
+            double protein,
+            double fat,
+            double carbs
+    ) {
+        /**
+         * Create a new {@link CompleteNutritionInfo} with zeroed values.
+         *
+         * @return A {@link CompleteNutritionInfo} with zeroed values.
+         */
+        static CompleteNutritionInfo zero() {
+            return new CompleteNutritionInfo(0.0, 0.0, 0.0);
+        }
+
+        /**
+         * Check whether this instance has all values set to zero.
+         *
+         * @return Whether all values (protein, carbs, fat) are zero.
+         */
+        public boolean isZero() {
+            return this.protein() == 0.0
+                    && this.carbs() == 0.0
+                    && this.fat() == 0.0;
+        }
+
+        /**
+         * Scale this object by an amount. Multiplies all values by amount.
+         *
+         * @param amount The amount to scale it by.
+         * @return The newly scaled nutrition info.
+         */
+        public CompleteNutritionInfo scaled(double amount) {
+            return new CompleteNutritionInfo(
+                    this.protein() * amount,
+                    this.fat() * amount,
+                    this.carbs() * amount
+            );
+        }
+
+        /**
+         * Add another nutrition info object to this object.
+         *
+         * @param rhs The nutrition info object to add.
+         * @return A new nutrition info object with the sum of both objects' nutrients.
+         */
+        public CompleteNutritionInfo add(CompleteNutritionInfo rhs) {
+            return new CompleteNutritionInfo(
+                    this.protein() + rhs.protein(),
+                    this.fat() + rhs.fat(),
+                    this.carbs() + rhs.carbs()
+            );
+        }
+    }
+
+    private final LocaleManager localeManager;
+    private final Logger logger = Logger.getLogger(NutritionPieChartCtrl.class.getName());
+
+    @FXML
+    PieChart pieChart;
+
+    private Recipe recipe;
+
+    @Inject
+    NutritionPieChartCtrl(
+            LocaleManager manager
+    ) {
+        this.localeManager = manager;
+    }
+
+    /**
+     * Get the data for this pie chart based on the current recipe.
+     * <p>
+     * This accumulates all the nutrients (properly scaled) from all ingredients in this recipe
+     * and returns a summary with data points.
+     * </p>
+     * <p>
+     * The list will be of length 3 if any nutrients are added, or 0 if all the nutrients
+     * sum up to be 0.
+     * </p>
+     * @return The data for this pie chart, as a labeled list of data.
+     */
+    private List<PieChart.Data> getPieChartData() {
+        CompleteNutritionInfo info = this.recipe
+                .getIngredients()
+                .stream()
+                .map(ri -> {
+                    Ingredient i = ri.getIngredient();
+                    logger.info("Mapping ingredient " + i.toString());
+
+                    switch (ri) {
+                        case FormalIngredient fi -> {
+                            return new CompleteNutritionInfo(
+                                    i.getProteinPer100g(),
+                                    i.getFatPer100g(),
+                                    i.getCarbsPer100g()
+                            )
+                                    .scaled(fi.getBaseAmount());
+                        }
+                        case VagueIngredient vi -> {
+                            return new CompleteNutritionInfo(
+                                    i.getProteinPer100g(),
+                                    i.getFatPer100g(),
+                                    i.getCarbsPer100g()
+                            )
+                                    .scaled(vi.getBaseAmount());
+                        }
+                        default -> {
+                            return null;
+                        }
+                    }
+                })
+                .filter(Objects::nonNull)
+                .reduce(CompleteNutritionInfo::add)
+                .orElseGet(CompleteNutritionInfo::zero);
+
+        this.logger.info( "Updated data: " + info.toString() );
+
+        if (info.isZero()) {
+            return List.of();
+        }
+
+        return List.of(
+                new PieChart.Data(
+                        "Protein",
+                        info.protein()
+                ),
+                new PieChart.Data(
+                        "Fat",
+                        info.fat()
+                ),
+                new PieChart.Data(
+                        "Carbs",
+                        info.carbs()
+                )
+        );
+    }
+
+    /**
+     * Set the current recipe to be displayed in the pie chart.
+     * The pie chart will be refreshed.
+     * <p>
+     * The pie chart will disappear if all the nutrients in the recipe
+     * are zero.
+     * </p>
+     * @param recipe The recipe to display.
+     */
+    public void setRecipe(Recipe recipe) {
+        this.recipe = recipe;
+        this.refresh();
+    }
+
+    @Override
+    public void updateText() {
+
+    }
+
+    @Override
+    public LocaleManager getLocaleManager() {
+        return this.localeManager;
+    }
+
+    /**
+     * Refresh the data in this pie chart.
+     */
+    private void refresh() {
+        if (this.recipe == null) {
+            this.pieChart.setVisible(false);
+            logger.info("Refreshing pie chart with no recipe");
+            return;
+        }
+
+        logger.info("Refreshing pie chart with recipe");
+        this.pieChart.setVisible(true);
+        this.pieChart.getData().setAll(
+                this.getPieChartData()
+        );
+    }
+
+    public void initializeComponents() {
+        final double START_ANGLE = 60.0;
+
+        this.pieChart.setClockwise(true);
+        this.pieChart.setStartAngle(START_ANGLE);
+        this.refresh();
+    }
+}

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.scenes.nutrition.NutritionPieChartCtrl;
 import client.service.ShoppingListService;
 import client.utils.Config;
 import client.utils.ConfigService;
@@ -106,6 +107,9 @@ public class RecipeDetailCtrl implements LocaleAware {
     @FXML
     private ComboBox<String> langSelector;
 
+    @FXML
+    private NutritionPieChartCtrl pieChartController;
+
     private ListView<Recipe> getParentRecipeList() {
         return this.appCtrl.recipeList;
     }
@@ -185,11 +189,14 @@ public class RecipeDetailCtrl implements LocaleAware {
             // expose the scaled view to list controllers
             this.ingredientListController.refetchFromRecipe(this.recipeView.getScaled());
             this.stepListController.refetchFromRecipe(this.recipeView.getScaled());
+            this.pieChartController.setRecipe(recipe);
             return;
         }
 
         this.ingredientListController.refetchFromRecipe(recipe);
         this.stepListController.refetchFromRecipe(recipe);
+
+        this.pieChartController.setRecipe(recipe);
     }
 
     /**

client/src/main/resources/client/scenes/nutrition/NutritionPieChart.fxml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<?import javafx.scene.chart.PieChart?>
+
+
+<PieChart fx:controller="client.scenes.nutrition.NutritionPieChartCtrl" fx:id="pieChart" xmlns="http://javafx.com/javafx/25" xmlns:fx="http://javafx.com/fxml/1" />

client/src/main/resources/client/scenes/recipe/RecipeDetailView.fxml

@@ -42,6 +42,11 @@
     <!-- Preparation -->
     <fx:include source="RecipeStepList.fxml" fx:id="stepList"
                 VBox.vgrow="ALWAYS" maxWidth="Infinity" />
+    <HBox spacing="20">
+        <VBox spacing="0">
             <Label fx:id="inferredServeSizeLabel" />
             <Label fx:id="inferredKcalLabel" />
         </VBox>
+        <fx:include fx:id="pieChart" source="../nutrition/NutritionPieChart.fxml" />
+    </HBox>
+</VBox>