First commit of the cupcake kata. The toppings are implemented

.gitignore

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+### IntelliJ IDEA ###
+.idea/
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

src/Application.java

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+import cupcake.*;
+import views.CupcakeView;
+
+public class Application {
+
+    public void run() {
+        Cupcake cupcake1 = new Cupcake();
+        Cupcake cupcake2 = new Cupcake();
+
+        CupcakeDecorator decorator1 = new NutsCupcakeDecorator(new BlackChocolateCupcakeDecorator(cupcake1));
+        CupcakeDecorator decorator2 = new SugarCupcakeDecorator(new NutsCupcakeDecorator(new BlackChocolateCupcakeDecorator(new SugarCupcakeDecorator(cupcake2))));
+
+        CupcakeView.displayCupcakeToppings(decorator1);
+        CupcakeView.displayCupcakePrice(decorator1);
+
+        CupcakeView.displayCupcakeToppings(decorator2);
+        CupcakeView.displayCupcakePrice(decorator2);
+    }
+}

src/Main.java

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+
+void main(String[] args) {
+    var app = new Application();
+    app.run();
+}

src/cupcake/BlackChocolateCupcakeDecorator.java

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+package cupcake;
+
+import toppings.BlackChocolateTopping;
+
+public class BlackChocolateCupcakeDecorator extends CupcakeDecorator {
+    public BlackChocolateCupcakeDecorator(Cupcake cupcake) {
+        super(cupcake);
+        cupcake.addTopping(new BlackChocolateTopping());
+    }
+
+    public BlackChocolateCupcakeDecorator(CupcakeDecorator cupcakeDecorator) {
+        super(cupcakeDecorator);
+        cupcake.addTopping(new BlackChocolateTopping());
+    }
+}

src/cupcake/Cupcake.java

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+package cupcake;
+
+import toppings.Topping;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Cupcake {
+    private final List<Topping> toppings;
+
+    public Cupcake() {
+        this.toppings = new ArrayList<>();
+    }
+
+    public void addTopping(Topping topping) {
+        toppings.add(topping);
+    }
+
+    public String getToppingsNames() {
+        // TODO: refactor this method to reduce the complexity
+        StringBuilder builder = new StringBuilder();
+
+        if (!toppings.isEmpty())
+            builder.append(toppings.getFirst().getName());
+        else
+            return "";
+
+        if (toppings.size() >= 2)
+            builder.append(" with ")
+                    .append(toppings.get(1).getName());
+
+        for (int i = 2; i < toppings.size(); i++) {
+            Topping topping = toppings.get(i);
+
+            if (i == toppings.size() - 1) {
+                builder.append(" and ")
+                        .append(topping.getName());
+            } else {
+                builder.append(", ")
+                        .append(topping.getName());
+            }
+        }
+
+        return builder.toString();
+    }
+
+    public double computePrice() {
+        double cupcakePrice = 0.0d;
+        for (final Topping topping : toppings) {
+            cupcakePrice += topping.getPrice();
+        }
+        return cupcakePrice;
+    }
+}

src/cupcake/CupcakeDecorator.java

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+package cupcake;
+
+public abstract class CupcakeDecorator {
+    protected Cupcake cupcake;
+
+    public CupcakeDecorator(Cupcake cupcake) {
+        this.cupcake = cupcake;
+    }
+
+    public CupcakeDecorator(CupcakeDecorator cupcakeDecorator) {
+        this.cupcake = cupcakeDecorator.cupcake;
+    }
+
+    public double computePrice() {
+        return cupcake.computePrice();
+    }
+
+    public String getToppingsNames() {
+        return cupcake.getToppingsNames();
+    }
+}

src/cupcake/NutsCupcakeDecorator.java

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+package cupcake;
+
+import toppings.NutsTopping;
+
+public class NutsCupcakeDecorator extends CupcakeDecorator {
+    public NutsCupcakeDecorator(Cupcake cupcake) {
+        super(cupcake);
+        cupcake.addTopping(new NutsTopping());
+    }
+
+    public NutsCupcakeDecorator(CupcakeDecorator cupcakeDecorator) {
+        super(cupcakeDecorator);
+        cupcakeDecorator.cupcake.addTopping(new NutsTopping());
+    }
+}

src/cupcake/SugarCupcakeDecorator.java

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+package cupcake;
+
+import toppings.SugarTopping;
+
+public class SugarCupcakeDecorator extends CupcakeDecorator {
+    public SugarCupcakeDecorator(Cupcake cupcake) {
+        super(cupcake);
+        cupcake.addTopping(new SugarTopping());
+    }
+
+    public SugarCupcakeDecorator(CupcakeDecorator cupcakeDecorator) {
+        super(cupcakeDecorator);
+        cupcakeDecorator.cupcake.addTopping(new SugarTopping());
+    }
+}

src/toppings/BlackChocolateTopping.java

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+package toppings;
+
+public class BlackChocolateTopping extends Topping {
+    public BlackChocolateTopping() {
+        super("black chocolate", 0.50d);
+    }
+}

src/toppings/NutsTopping.java

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+package toppings;
+
+public class NutsTopping extends Topping {
+    public NutsTopping() {
+        super("nuts", 0.75d);
+    }
+}

src/toppings/SugarTopping.java

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+package toppings;
+
+public class SugarTopping extends Topping {
+    public SugarTopping() {
+        super("sugar", 0.12d);
+    }
+}

src/toppings/Topping.java

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+package toppings;
+
+public abstract class Topping {
+    protected final String name;
+    protected final double price;
+
+    public Topping(String name, double type) {
+        this.name = name;
+        this.price = type;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public double getPrice() {
+        return price;
+    }
+}

src/views/CupcakeView.java

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+package views;
+
+import cupcake.CupcakeDecorator;
+
+import java.text.DecimalFormat;
+
+public class CupcakeView {
+    public static void displayCupcakeToppings(CupcakeDecorator cupcakeDecorator) {
+        System.out.println("Cupcake with : " + cupcakeDecorator.getToppingsNames());
+    }
+
+    public static void displayCupcakePrice(CupcakeDecorator cupcakeDecorator) {
+        double price = cupcakeDecorator.computePrice();
+        DecimalFormat fd = new DecimalFormat("0.00€");
+        String formattedPrice = fd.format(price);
+
+        System.out.println(formattedPrice);
+    }
+}