2017/03 版 DDDパターンを活用した Laravelアプリケーション開発/201703-ddd-with-laravel

https://github.com/shin1x1/laravel-ddd-sample

Transcript

1. ɹ!shin1x1 2017//23 <൛>
   %%%ύλʔϯΛ׆༻ͨ͠
   -BSBWFMΞϓϦέʔγϣϯ։ൃ
2. https://github.com/shin1x1/laravel-ddd-sample
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22. ύλʔϯΛ׆༻࣮ͨ͠૷
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    Ҏ্ͷ੔਺ ɾࡏݿ͕ෆ଍͍ͯ͠Δ͔
27. &MPRVFOU 3FQPTJUPSZ class Item
 {
 /** @var int */
 private $id;
 
 /** @var string */
 private $name;
 
 /** @var int */
 private $price;
 
 /** @var int */
 private $stock;
 }
 int int int *UFNʢ঎඼ʣ
28. &MPRVFOU 3FQPTJUPSZ class Item
 {
 /** @var int */
 private $id;
 
 /** @var string */
 private $name;
 
 /** @var int */
 private $price;
 
 /** @var int */
 private $stock;
 }
 int int int *UFNʢ঎඼ʣ w
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30. &MPRVFOU 3FQPTJUPSZ class Item
 {
 /** @var ItemId */
 private $id;
 
 /** @var string */
 private $name;
 
 /** @var ItemPrice */
 private $price;
 
 /** @var Stock */
 private $stock;
 }
 ItemId ItemPrice Stock ܕʢΫϥεʣͰදݱ
31. &MPRVFOU 3FQPTJUPSZ class ItemId
 {
 /** @var int */
 private $value;
 
 /**
 * @param int $value
 */
 public function __construct(int $value)
 {
 $this->value = $value;
 }
 
 public function value(): int
 {
 return $this->value;
 }
 } *UFN*E ৼΔ෣͍ʢԋࢉʣ͕ແ͍
32. &MPRVFOU 3FQPTJUPSZ class ItemPrice
 {
 /** @var int */
 private $value;
 
 
 public function __construct(int $value = 0)
 {
 if ($value < 0) {
 throw new InvariantException('value must be positive number:' . $value);
 }
 $this->value = $value;
 }
 //(snip)
 
 *UFN1SJDF ঎඼Ձ֨͸
    
    Ҏ্ͷ੔਺
33. &MPRVFOU 3FQPTJUPSZ 
 public function calcSubtotal(ItemCount $count): ItemSubtotal
 {
 return new ItemSubtotal($this->value * $count->value());
 }
 *UFN1SJDF ঎඼Ձ֨
    
    ঎඼ݸ਺
    
    ঎඼খܭ
34. D
    
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35. &MPRVFOU 3FQPTJUPSZ class Cart
 {
 /** @var CartElement[]|Collection */
 private $elements;
 
 public function addItem(Item $item, ItemCount $count)
 {
 if (!$item->isSufficient($count)) {
 throw new InvariantException('stock is insufficient');
 }
 
 $this->elements->push(new CartElement($item, $count));
 }
 $BSU ࡏݿ͕଍Γͳ͚Ε͹ྫ֎
36. &MPRVFOU 3FQPTJUPSZ class Cart
 {
 /** @var CartElement[]|Collection */
 private $elements;
 
 public function addItem(Item $item, ItemCount $count)
 {
 if (!$item->isSufficient($count)) {
 throw new PreconditionsException('stock is insufficient');
 }
 
 $this->elements->push(new CartElement($item, $count));
 }
 $BSU ΧʔτཁૉΛ௥Ճ
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43. &MPRVFOU 3FQPTJUPSZ interface ItemRepository
 {
 public function findById(ItemId $id): Item;
 } *UFN3FQPTJUPSZ
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    4FSWJDF ΠϯϑϥετϥΫνϟϨΠϠ ϦϙδτϦ &MPRVFOU
47. &MPRVFOU 3FQPTJUPSZ class EloquentItemRepository implements ItemRepository
 {
 private $eloquent;
 
 public function __construct(EloquentItem $eloquent)
 {
 $this->eloquent = $eloquent;
 }
 
 public function findById(ItemId $id): Item
 {
 $item = $this->eloquent->find($id->value());
 if (empty($item)) {
 throw new NotFoundException('item not found');
 }
 
 return $item->toDomain();
 }
 } &MPRVFOU*UFN3FQPTJUPSZ
48. &MPRVFOU 3FQPTJUPSZ class EloquentItemRepository implements ItemRepository
 {
 private $eloquent;
 
 public function __construct(EloquentItem $eloquent)
 {
 $this->eloquent = $eloquent;
 }
 
 public function findById(ItemId $id): Item
 {
 $item = $this->eloquent->find($id->value());
 if (empty($item)) {
 throw new NotFoundException('item not found');
 }
 
 return $item->toDomain();
 }
 } &MPRVFOU*UFN3FQPTJUPSZ
49. &MPRVFOU 3FQPTJUPSZ class EloquentItem extends AppEloquent implements Domainable
 {
 protected $table = 'items';
 
 public function toDomain(): Item
 {
 return new Item(
 new ItemId($this->id),
 $this->name,
 new ItemPrice($this->price),
 new Stock($this->stock)
 );
 }
 } &MPRVFOU*UFN
50. &MPRVFOU 3FQPTJUPSZ class RepositoryServiceProvider extends ServiceProvider
 {
 public function register()
 {
 $this->app->bind(ItemRepository::class, EloquentItemRepository::class);
 }
 } ϦϙδτϦΛαʔϏείϯςφ΁όΠϯυ
51. &MPRVFOU 3FQPTJUPSZ class AddItemToCart
 {
 private $itemRepo;
 
 public function __construct(ItemRepository $itemRepo)
 {
 $this->itemRepo = $itemRepo;
 }
 
 public function __invoke(int $itemId, int $count): Cart
 {
 $item = $this->itemRepo->findById(new ItemId($itemId));
 // (snip)
 }
 }
 ར༻ίʔυ
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53. &MPRVFOU 3FQPTJUPSZ public function find(): Cart
 {
 $cart = $this->session->get(static::SESSION_KEY);
 if (empty($cart)) {
 throw new NotFoundException('cart not found');
 }
 
 return $cart;
 }
 
 public function store(Cart $cart)
 {
 $this->session->put(static::SESSION_KEY, $cart);
 }
 )UUQ4FTTJPO$BSU3FQPTJUPSZ ηογϣϯ͔Βͷೖग़ྗ
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57. &MPRVFOU 3FQPTJUPSZ public function post(Request $request, AddItemToCart $useCase): JsonResponse
 {
 $this->validate($request, [
 'item_id' => 'required|integer',
 'count' => 'required|integer'
 ]);
 
 $cart = $useCase(
 $request->get('item_id'),
 $request->get('count')
 );
 return response()->json(['cart' => $this->cartToArray($cart)]); } $POUSPMMFS ͬ͘͟ΓόϦσʔγϣϯ
 ʢυϝΠϯϧʔϧ͸υϝΠϯϨΠϠͰʣ
58. &MPRVFOU 3FQPTJUPSZ $POUSPMMFS public function post(Request $request, AddItemToCart $useCase): JsonResponse
 {
 $this->validate($request, [
 'item_id' => 'required|integer',
 'count' => 'required|integer'
 ]);
 
 $cart = $useCase(
 $request->get('item_id'),
 $request->get('count')
 );
 return response()->json(['cart' => $this->cartToArray($cart)]); } ϢʔεέʔεΛ࣮ߦ
59. &MPRVFOU 3FQPTJUPSZ public function _invoke(int $itemId, int $count): Cart
 {
 $item = $this->itemRepo->findById(new ItemId($itemId));
 
 try {
 $cart = $this->cartRepo->find();
 } catch (NotFoundException $e) {
 $cart = new Cart();
 }
 
 $cart->addItem($item, new ItemCount($count));
 $this->cartRepo->store($cart);
 
 return $cart;
 }
 6TF$BTF
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