chore: refactored project according to clean architecture

internal/service/order.go

@@ -0,0 +1,70 @@
+package service
+
+import (
+	"context"
+
+	"orderservice/internal/domain"
+	"orderservice/internal/repository"
+
+	"github.com/google/uuid"
+)
+
+type OrderService struct {
+	repo repository.OrderRepository
+}
+
+func NewOrderService(repo repository.OrderRepository) *OrderService {
+	return &OrderService{
+		repo: repo,
+	}
+}
+
+func (s *OrderService) Create(ctx context.Context, item string, quantity int32) (*domain.Order, error) {
+	order := &domain.Order{
+		ID:       uuid.NewString(),
+		Item:     item,
+		Quantity: quantity,
+	}
+
+	err := order.Validate()
+	if err != nil {
+		return nil, err
+	}
+
+	if err := s.repo.Create(ctx, order); err != nil {
+		return nil, err
+	}
+	return order, nil
+}
+
+func (s *OrderService) Get(ctx context.Context, id string) (*domain.Order, error) {
+	return s.repo.Get(ctx, id)
+}
+
+func (s *OrderService) Update(ctx context.Context, id string, item string, quantity int32) (*domain.Order, error) {
+	order, err := s.repo.Get(ctx, id)
+	if err != nil {
+		return nil, err
+	}
+
+	order.Item = item
+	order.Quantity = quantity
+
+	err = order.Validate()
+	if err != nil {
+		return nil, err
+	}
+
+	if err := s.repo.Update(ctx, order); err != nil {
+		return nil, err
+	}
+	return order, nil
+}
+
+func (s *OrderService) Delete(ctx context.Context, id string) error {
+	return s.repo.Delete(ctx, id)
+}
+
+func (s *OrderService) List(ctx context.Context) ([]*domain.Order, error) {
+	return s.repo.List(ctx)
+}