Files
carvalho-finances/apps/api/internal/service/category.go
T
Mlcavalho1andClaude Sonnet 4.6 d6782d51a5 feat(#17): CRUD de categorias — API Go + tela Vue + testes unitários
API REST /api/categories (GET/POST/PUT/DELETE) com regras de negócio:
categorias padrão não podem ser excluídas; categorias com transações vinculadas
também bloqueadas. Tela Vue com formulário inline de criação/edição, indicador
visual de categorias padrão e botão de exclusão condicional.

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>
2026-05-26 20:11:54 -03:00

84 lines
2.0 KiB
Go

package service
import (
"context"
"errors"
"strings"
"financeiro-carvalho/internal/model"
"financeiro-carvalho/internal/repository"
)
var (
ErrDefaultCategory = errors.New("default categories cannot be deleted")
ErrHasTransactions = errors.New("category has linked transactions")
ErrEmptyName = errors.New("name is required")
ErrInvalidColor = errors.New("color must be a valid hex color (e.g. #FF5733)")
)
type CategoryService struct {
repo repository.CategoryRepository
}
func NewCategoryService(repo repository.CategoryRepository) *CategoryService {
return &CategoryService{repo: repo}
}
func (s *CategoryService) List(ctx context.Context) ([]model.Category, error) {
return s.repo.List(ctx)
}
func (s *CategoryService) Create(ctx context.Context, in model.CategoryInput) (*model.Category, error) {
if err := validateInput(in); err != nil {
return nil, err
}
return s.repo.Create(ctx, strings.TrimSpace(in.Name), in.Color)
}
func (s *CategoryService) Update(ctx context.Context, id int, in model.CategoryInput) (*model.Category, error) {
if err := validateInput(in); err != nil {
return nil, err
}
return s.repo.Update(ctx, id, strings.TrimSpace(in.Name), in.Color)
}
func (s *CategoryService) Delete(ctx context.Context, id int) error {
cat, err := s.repo.GetByID(ctx, id)
if err != nil {
return err
}
if cat.IsDefault {
return ErrDefaultCategory
}
hasTx, err := s.repo.HasTransactions(ctx, id)
if err != nil {
return err
}
if hasTx {
return ErrHasTransactions
}
return s.repo.Delete(ctx, id)
}
func validateInput(in model.CategoryInput) error {
if strings.TrimSpace(in.Name) == "" {
return ErrEmptyName
}
if !isValidHexColor(in.Color) {
return ErrInvalidColor
}
return nil
}
func isValidHexColor(c string) bool {
if len(c) != 7 || c[0] != '#' {
return false
}
for _, ch := range c[1:] {
if !((ch >= '0' && ch <= '9') || (ch >= 'a' && ch <= 'f') || (ch >= 'A' && ch <= 'F')) {
return false
}
}
return true
}