feat: SEO backend data (1/4)

api/pkg/apperr/messages.go

@@ -81,3 +81,8 @@ const InvalidURLErrorMessage = "invalid_url"
 const TooManyLinksErrorMessage = "too_many_links"
 const InvalidSlugErrorMessage = "invalid_slug"
 const AuthorImageNotFoundErrorMessage = "image_not_found"
+
+const ArticleSlugTakenErrorMessage = "slug_taken"
+const ArticleImageNotFoundErrorMessage = "image_not_found"
+const InvalidTitleTemplateErrorMessage = "invalid_title_template"
+const SlugSuggestionHeader = "X-Slug-Suggestion"

api/pkg/validator/validator.go

@@ -1,6 +1,7 @@
 package validator
 
 import (
+	"RenewCMS/internal/domain/article"
 	"RenewCMS/internal/domain/author"
 	"RenewCMS/internal/domain/image"
 	"RenewCMS/internal/domain/site"
@@ -17,6 +18,7 @@ const siteNameTag = "sitename"
 const AuthorNameTag = "authorname"
 const AuthorSlugTag = "authorslug"
 const SocialTypeTag = "socialtype"
+const ArticleSlugTag = "articleslug"
 
 var inviteEmailPattern = regexp.MustCompile(`^[^\s@]+@[^\s@.]+(\.[^\s@.]+)+$`)
 
@@ -31,6 +33,15 @@ func InitValidator() {
 	_ = Validate.RegisterValidation(AuthorNameTag, isAuthorName, true)
 	_ = Validate.RegisterValidation(AuthorSlugTag, isAuthorSlug, true)
 	_ = Validate.RegisterValidation(SocialTypeTag, isSocialType, true)
+	_ = Validate.RegisterValidation(ArticleSlugTag, isArticleSlug, true)
+}
+
+func isArticleSlug(field validator.FieldLevel) bool {
+	if isAbsent(field) {
+		return true
+	}
+	value := field.Field().String()
+	return value == "" || article.IsValidSlug(value)
 }
 
 func isAbsent(field validator.FieldLevel) bool {