feat!: add slug to training

BREAKING CHANGE: update init migration

pkg/slug/slug.go

@@ -0,0 +1,47 @@
+package slug
+
+import (
+	"errors"
+	"github.com/gosimple/unidecode"
+	"regexp"
+	"strings"
+)
+
+type Slug string
+
+var (
+	ErrInvalidSlug = errors.New("invalid slug")
+
+	regexpNonAuthorizedChars = regexp.MustCompile("[^a-zA-Z0-9-_]")
+	regexpMultipleDashes     = regexp.MustCompile("-+")
+)
+
+func New(s string) Slug {
+	s = unidecode.Unidecode(s)
+	s = strings.ToLower(s)
+	s = regexpNonAuthorizedChars.ReplaceAllString(s, "-")
+	s = regexpMultipleDashes.ReplaceAllString(s, "-")
+	s = strings.Trim(s, "-_")
+
+	return Slug(s)
+}
+
+func NewString(s string) string {
+	return New(s).String()
+}
+
+func Validate(s string) error {
+	if s == "" {
+		return ErrInvalidSlug
+	}
+
+	if s == NewString(s) {
+		return nil
+	}
+
+	return ErrInvalidSlug
+}
+
+func (s Slug) String() string {
+	return string(s)
+}