一副紙牌

我最近一直在與 Verbs 和 Livewire 合作，並認為嘗試創建一些我喜歡玩的紙牌遊戲是一個有趣的實驗。

為了促進這一點，我需要定義一副卡片，我可以在之後從事的任何專案中使用它。

一副牌需要包含 Card、Deck 和 CardCollection 類別。一張牌應有花色和數值，一副牌應由 52 張牌組成。因為花色和數值都是為一副牌定義的，所以我可以使用枚舉來表示牌的屬性。

CardCollection 類別允許我以 Verbs 狀態安全地儲存卡片集合。

<?php
// Cards/Enums/Suit.php

declare(strict_types=1);

namespace Cards\Enums;

enum Suit: string
{
    case Clubs = 'Clubs';
    case Diamonds = 'Diamonds';
    case Hearts = 'Hearts';
    case Spades = 'Spades';
}

<?php
// Cards/Enums/Value.php

declare(strict_types=1);

namespace Cards\Enums;

enum Value: string
{
    case Two = 'Two';
    case Three = 'Three';
    case Four = 'Four';
    case Five = 'Five';
    case Six = 'Six';
    case Seven = 'Seven';
    case Eight = 'Eight';
    case Nine = 'Nine';
    case Ten = 'Ten';
    case Jack = 'Jack';
    case Queen = 'Queen';
    case King = 'King';
    case Ace = 'Ace';
}

<?php
// Cards/Card.php

declare(strict_types=1);

namespace Cards;

use Cards\Enums\Suit;
use Cards\Enums\Value;

final readonly class Card
{
    public function __construct(
        public Suit $suit,
        public Value $value,
    ) {}
}

<?php
// Cards/CardCollection.php

declare(strict_types=1);

namespace Cards;

use Illuminate\Support\Collection;
use Symfony\Component\Serializer\Normalizer\DenormalizerInterface;
use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
use Thunk\Verbs\SerializedByVerbs;

class CardCollection extends Collection implements SerializedByVerbs
{
    public static function deserializeForVerbs(mixed $data, DenormalizerInterface $denormalizer): static
    {
        return static::make($data)
            ->map(fn($serialized) => Card::deserializeForVerbs($serialized, $denormalizer));
    }

    public function serializeForVerbs(NormalizerInterface $normalizer): string|array
    {
        return $this->map(fn(Card $card) => $card->serializeForVerbs($normalizer))->toJson();
    }
}

<?php
// Cards/Deck.php

declare(strict_types=1);

namespace Cards;

use Cards\Enums\Suit;
use Cards\Enums\Value;

final class Deck
{
    public CardCollection $cards;

    public function __construct()
    {
        $this->cards = CardCollection::make([]);

        collect(CardSuit::cases())
            ->each(function (CardSuit $suit): void {
                collect(CardValue::cases())
                    ->each(function (CardValue $value) use ($suit): void {
                        $this->cards->push(new Card($suit, $value));
                    });
            });

        $this->shuffle();
    }

    public function shuffle(): void
    {
        $this->cards = $this->cards
            ->shuffle()
            ->reverse();
    }

    public function deal(): ?Card
    {
        if (0 === $this->cards->count()) {
            return null;
        }

        return $this->cards->pop();
    }

    public function remainingCards(): int
    {
        return $this->cards->count();
    }
}

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