100 lines
3 KiB
Go
100 lines
3 KiB
Go
package service
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import (
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"context"
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"encoding/json"
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"errors"
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"github.com/example/cms/internal/domain"
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"github.com/example/cms/internal/repository"
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"regexp"
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"strings"
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"time"
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)
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type IContentService interface {
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List(context.Context, int, int, string, string, []string) ([]domain.Content, error)
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ListCategories(context.Context) ([]domain.Category, error)
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ListBadges(context.Context) ([]domain.Badge, error)
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Get(context.Context, string) (domain.Content, error)
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Update(context.Context, domain.Content, domain.Session) (domain.Content, error)
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}
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type ContentService struct {
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repo repository.IContentRepository
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auth *AuthService
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}
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func NewContentService(r repository.IContentRepository, a *AuthService) *ContentService {
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return &ContentService{repo: r, auth: a}
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}
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func (s *ContentService) List(ctx context.Context, limit, offset int, category, status string, badges []string) ([]domain.Content, error) {
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if limit < 1 {
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limit = 20
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}
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if limit > 100 {
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limit = 100
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}
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if offset < 0 {
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offset = 0
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}
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return s.repo.List(ctx, limit, offset, category, status, badges)
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}
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func (s *ContentService) ListCategories(ctx context.Context) ([]domain.Category, error) {
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return s.repo.ListCategories(ctx)
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}
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func (s *ContentService) ListBadges(ctx context.Context) ([]domain.Badge, error) {
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return s.repo.ListBadges(ctx)
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}
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func (s *ContentService) Get(ctx context.Context, slug string) (domain.Content, error) {
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if !validSlug(slug) {
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return domain.Content{}, errors.New("invalid slug")
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}
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return s.repo.FindBySlug(ctx, slug)
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}
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func (s *ContentService) Update(ctx context.Context, c domain.Content, session domain.Session) (domain.Content, error) {
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if s.auth == nil || !s.auth.CanEdit(ctx, session) {
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return domain.Content{}, errors.New("forbidden")
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}
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if !validSlug(c.Slug) || strings.TrimSpace(c.Title) == "" || strings.TrimSpace(c.Body) == "" {
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return domain.Content{}, errors.New("invalid content")
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}
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old, err := s.repo.FindBySlug(ctx, c.Slug)
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if err != nil {
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return domain.Content{}, err
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}
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c.ID = old.ID
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c.CreatedAt = old.CreatedAt
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c.CreatedBy = old.CreatedBy
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c.UpdatedAt = time.Now()
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c.Badges = normalizeBadges(c.Badges)
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if session.UserID != nil {
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c.UpdatedBy = *session.UserID
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}
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snapshot, _ := json.Marshal(c)
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h := domain.ContentHistory{ContentID: c.ID, Operation: "updated", CreatedAt: c.UpdatedAt, Snapshot: string(snapshot), ActorID: session.UserID, ActorAdminID: session.AdminID}
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if err = s.repo.Update(ctx, c, h); err != nil {
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return domain.Content{}, err
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}
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return c, nil
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}
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func normalizeBadges(values []string) []string {
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result := make([]string, 0, len(values))
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seen := make(map[string]struct{}, len(values))
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for _, value := range values {
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value = strings.ToLower(strings.TrimSpace(value))
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if value == "" || len(value) > 100 {
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continue
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}
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if _, ok := seen[value]; ok {
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continue
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}
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seen[value] = struct{}{}
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result = append(result, value)
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}
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return result
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}
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var slugRE = regexp.MustCompile(`^[a-z0-9]+(?:-[a-z0-9]+)*$`)
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func validSlug(s string) bool { return len(s) <= 200 && slugRE.MatchString(s) }
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