/
create_category.go
74 lines (60 loc) · 1.95 KB
/
create_category.go
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package usecase
import (
"context"
"github.com/tiagompalte/golang-clean-arch-template/internal/app/entity"
"github.com/tiagompalte/golang-clean-arch-template/internal/app/repository"
errPkg "github.com/tiagompalte/golang-clean-arch-template/internal/pkg/errors"
"github.com/tiagompalte/golang-clean-arch-template/pkg/errors"
)
type CreateCategoryUseCase interface {
Execute(ctx context.Context, input CreateCategoryInput) (entity.Category, error)
}
type CreateCategoryInput struct {
Name string
UserID uint32
}
func (i CreateCategoryInput) Validate() error {
aggrErr := errors.NewAggregatedError()
if i.Name == "" {
aggrErr.Add(errPkg.NewEmptyParameterError("name"))
}
if i.UserID == 0 {
aggrErr.Add(errPkg.NewEmptyParameterError("user_id"))
}
if aggrErr.Len() > 0 {
return errors.Wrap(aggrErr)
}
return nil
}
type CreateCategoryUseCaseImpl struct {
categoryRepository repository.CategoryRepository
}
func NewCreateCategoryUseCaseImpl(categoryRepository repository.CategoryRepository) CreateCategoryUseCase {
return CreateCategoryUseCaseImpl{
categoryRepository: categoryRepository,
}
}
func (u CreateCategoryUseCaseImpl) Execute(ctx context.Context, input CreateCategoryInput) (entity.Category, error) {
err := input.Validate()
if err != nil {
return entity.Category{}, errors.Wrap(err)
}
categoryNew := entity.Category{
Name: input.Name,
UserID: input.UserID,
}
category, err := u.categoryRepository.FindBySlugAndUserID(ctx, categoryNew.GetSlug(), categoryNew.UserID)
if err != nil && !errors.IsAppError(err, errors.ErrorCodeNotFound) {
return entity.Category{}, errors.Wrap(err)
} else if errors.IsAppError(err, errors.ErrorCodeNotFound) {
categoryID, err := u.categoryRepository.Insert(ctx, categoryNew)
if err != nil {
return entity.Category{}, errors.Wrap(err)
}
category, err = u.categoryRepository.FindByID(ctx, categoryID)
if err != nil {
return entity.Category{}, errors.Wrap(err)
}
}
return category, nil
}