Feat: Decorator implemented

.gitignore

@@ -0,0 +1,31 @@
+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+.kotlin
+.idea/
+
+### 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/Main.java

@@ -0,0 +1,6 @@
+import application.Application;
+
+public static void main(String[] args) {
+    var app = new Application();
+    app.run();
+}

src/application/Application.java

@@ -0,0 +1,24 @@
+package application;
+
+import decorator.TendersKebabDecorator;
+import decorator.TomatoKebabDecorator;
+import entities.Command;
+import entities.Kebab;
+import managers.CommandManager;
+
+public class Application {
+    public void run() {
+        var commandManager = CommandManager.getInstance();
+
+        Kebab kebab = new Kebab("3 viandes", 10.0);
+
+        Kebab kebab1 = new TomatoKebabDecorator(new TendersKebabDecorator(new TomatoKebabDecorator(new TomatoKebabDecorator(new Kebab("3 viandes", 10.0))))).getKebab();
+
+        Command command = new Command();
+        command.addKebab(kebab);
+        command.addKebab(kebab1);
+
+        commandManager.add(command);
+        commandManager.list();
+    }
+}

src/decorator/KebabDecorator.java

@@ -0,0 +1,27 @@
+package decorator;
+
+import entities.Kebab;
+
+public abstract class KebabDecorator {
+    private Kebab kebab;
+
+    public KebabDecorator(Kebab kebab) {
+        this.kebab = kebab;
+    }
+
+    public KebabDecorator(KebabDecorator kebabDecorator) {
+        this.kebab = kebabDecorator.getKebab();
+    }
+
+    public Kebab getKebab() {
+        return kebab;
+    }
+
+    public String getName() {
+        return kebab.getName();
+    }
+
+    public double getPrice() {
+        return kebab.getPrice();
+    }
+}

src/decorator/TendersKebabDecorator.java

@@ -0,0 +1,20 @@
+package decorator;
+
+import entities.Kebab;
+import entities.TendersAddon;
+
+public class TendersKebabDecorator extends KebabDecorator {
+    public TendersKebabDecorator(Kebab kebab) {
+        super(kebab);
+
+        TendersAddon tenders = new TendersAddon();
+        kebab.addIngredient(tenders);
+    }
+
+    public TendersKebabDecorator(KebabDecorator kebabDecorator) {
+        super(kebabDecorator);
+
+        TendersAddon tenders = new TendersAddon();
+        kebabDecorator.getKebab().addIngredient(tenders);
+    }
+}

src/decorator/TomatoKebabDecorator.java

@@ -0,0 +1,20 @@
+package decorator;
+
+import entities.Kebab;
+import entities.TomatoAddon;
+
+public class TomatoKebabDecorator extends KebabDecorator {
+    public TomatoKebabDecorator(Kebab kebab) {
+        super(kebab);
+
+        TomatoAddon tomato = new TomatoAddon();
+        kebab.addIngredient(tomato);
+    }
+
+    public TomatoKebabDecorator(KebabDecorator kebabDecorator) {
+        super(kebabDecorator);
+
+        TomatoAddon tomato = new TomatoAddon();
+        kebabDecorator.getKebab().addIngredient(tomato);
+    }
+}

src/entities/Addon.java

@@ -0,0 +1,27 @@
+package entities;
+
+public abstract class Addon {
+    private String name;
+    private double price;
+
+    public Addon(String name, double price) {
+        this.name = name;
+        this.price = price;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public double getPrice() {
+        return price;
+    }
+
+    public void setPrice(double price) {
+        this.price = price;
+    }
+}

src/entities/Command.java

@@ -0,0 +1,42 @@
+package entities;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Command {
+    private List<Kebab> kebabs;
+    private CommandState state;
+
+    public Command() {
+        this.kebabs = new ArrayList<>();
+        this.state = CommandState.CREATED;
+    }
+
+    public List<Kebab> getKebabs() {
+        return kebabs;
+    }
+
+    public void addKebab(Kebab kebab) {
+        kebabs.add(kebab);
+    }
+
+    public void setKebabs(List<Kebab> kebabs) {
+        this.kebabs = kebabs;
+    }
+
+    public CommandState getState() {
+        return state;
+    }
+
+    public void setState(CommandState state) {
+        this.state = state;
+    }
+
+    @Override
+    public String toString() {
+        return "Command{" +
+                "kebabs=" + kebabs +
+                ", state=" + state +
+                '}';
+    }
+}

src/entities/CommandState.java

@@ -0,0 +1,9 @@
+package entities;
+
+public enum CommandState {
+    CREATED,
+    RECEIVED,
+    COOKED,
+    DELIVERED,
+    FAILED
+}

src/entities/Kebab.java

@@ -0,0 +1,50 @@
+package entities;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Kebab {
+    private String name;
+    private double price;
+    private List<Addon> addons;
+
+    public Kebab(String name, double price) {
+        this.name = name;
+        this.price = price;
+        this.addons = new ArrayList<>();
+    }
+
+    public String getName() {
+        StringBuilder name = new StringBuilder();
+
+        name.append(this.name);
+
+        for (Addon addon : addons) {
+            name.append(", ");
+            name.append(addon.getName());
+        }
+
+        return name.toString();
+    }
+
+    public double getPrice() {
+        double price = 0.0d;
+
+        for (Addon addon : addons) {
+            price += addon.getPrice();
+        }
+        return price + this.price;
+    }
+
+    public void addIngredient(Addon addon) {
+        addons.add(addon);
+    }
+
+    @Override
+    public String toString() {
+        return "Kebab{" +
+                "name='" + getName() + '\'' +
+                ", price=" + getPrice() +
+                '}';
+    }
+}

src/entities/TendersAddon.java

@@ -0,0 +1,7 @@
+package entities;
+
+public class TendersAddon extends Addon {
+    public TendersAddon() {
+        super("Tenders", 2.0);
+    }
+}

src/entities/TomatoAddon.java

@@ -0,0 +1,7 @@
+package entities;
+
+public class TomatoAddon extends Addon {
+    public TomatoAddon() {
+        super("Tomato", 0.5);
+    }
+}

src/managers/CommandManager.java

@@ -0,0 +1,31 @@
+package managers;
+
+import entities.Command;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class CommandManager {
+    private List<Command> commands;
+    private static CommandManager INSTANCE;
+
+    private CommandManager() {
+        commands = new ArrayList<>();
+    }
+
+    public static CommandManager getInstance() {
+        if (INSTANCE == null)
+            INSTANCE = new CommandManager();
+        return INSTANCE;
+    }
+
+    public void add(Command command) {
+        commands.add(command);
+    }
+
+    public void list() {
+        for (Command command : commands) {
+            System.out.println(command);
+        }
+    }
+}