1.5. Builder¶

 1<?php
 2
 3// Builder interface
 4interface BurgerBuilder {
 5    public function addBun();
 6    public function addPatty();
 7    public function addCheese();
 8    public function addToppings();
 9    public function getBurger(): Burger;
10}

 1<?php
 2
 3// Concrete builder for basic burger
 4class BasicBurgerBuilder implements BurgerBuilder {
 5    private Burger $burger;
 6
 7    public function __construct() {
 8        $this->burger = new Burger();
 9    }
10
11    public function addBun() {
12        $this->burger->setBun("Plain Bun");
13    }
14
15    public function addPatty() {
16        $this->burger->setPatty("Beef Patty");
17    }
18
19    public function addCheese() {
20        $this->burger->setCheese("American Cheese");
21    }
22
23    public function addToppings() {
24        // No additional toppings for basic burger
25    }
26
27    public function getBurger(): Burger {
28        return $this->burger;
29    }
30}
31
32// Concrete builder for deluxe burger
33class DeluxeBurgerBuilder implements BurgerBuilder {
34    private Burger $burger;
35
36    public function __construct() {
37        $this->burger = new Burger();
38    }
39
40    public function addBun() {
41        $this->burger->setBun("Sesame Seed Bun");
42    }
43
44    public function addPatty() {
45        $this->burger->setPatty("Beef Patty");
46    }
47
48    public function addCheese() {
49        $this->burger->setCheese("Swiss Cheese");
50    }
51
52    public function addToppings() {
53        $this->burger->addTopping("Lettuce")
54            ->addTopping("Tomato")
55            ->addTopping("Onion")
56            ->addTopping("Pickles")
57            ->addTopping("Ketchup")
58            ->addTopping("Mustard");
59    }
60
61    public function getBurger(): Burger {
62        return $this->burger;
63    }
64}

 1<?php
 2
 3// Director
 4class BurgerDirector {
 5    private BurgerBuilder $builder;
 6
 7    public function setBuilder(BurgerBuilder $builder): Burger {
 8        $this->builder = $builder;
 9    }
10
11    public function buildBurger(): Burger {
12        $this->builder->addBun();
13        $this->builder->addPatty();
14        $this->builder->addCheese();
15        $this->builder->addToppings();
16
17        return $this->builder->getBurger();
18    }
19}

 1<?php
 2
 3// Product
 4class Burger {
 5    private string $bun;
 6    private string $patty;
 7    private string $cheese;
 8    private array $toppings;
 9
10    public function setBun(string $bun): void
11    {
12        $this->bun = $bun;
13    }
14
15    public function setPatty(string $patty): void
16    {
17        $this->patty = $patty;
18    }
19
20    public function setCheese(string $cheese): void
21    {
22        $this->cheese = $cheese;
23    }
24
25    public function addTopping(string $topping): static
26    {
27        $this->toppings[] = $topping;
28        return $this;
29    }
30
31    public function getBurgerInfo(): string {
32        $toppingsStr = implode(", ", $this->toppings);
33        return "Burger: {$this->bun} + {$this->patty} + {$this->cheese} + {$toppingsStr}";
34    }
35}

 1<?php
 2
 3// Client code
 4function clientCode(): void
 5{
 6    // Create a new director
 7    $director = new BurgerDirector();
 8
 9    // Create a basic burger builder
10    $basicBuilder = new BasicBurgerBuilder();
11
12    // Set the builder for the director
13    $director->setBuilder($basicBuilder);
14
15    // Build the burger
16    $basicBurger = $director->buildBurger();
17
18    // Print the burger
19    echo $basicBurger->getBurgerInfo();
20}

1clientCode();