feat: rewrite render

pkg/slug/slug.go

@@ -0,0 +1,35 @@
+package slug
+
+import (
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+type Slugger struct {
+	occurences map[string]int
+}
+
+var (
+	expWhitespace = regexp.MustCompile(`\s`)
+	expSpecials   = regexp.MustCompile("[\u2000-\u206F\u2E00-\u2E7F\\'!\"#$%&()*+,./:;<=>?@[\\]^`{|}~’]")
+)
+
+func New() *Slugger {
+	return &Slugger{
+		occurences: make(map[string]int),
+	}
+}
+
+func (s *Slugger) Slug(str string) string {
+	str = expWhitespace.ReplaceAllString(str, "-")
+	str = expSpecials.ReplaceAllString(str, "")
+
+	old := str
+	if o := s.occurences[str]; o > 0 {
+		str += "-" + strconv.Itoa(o)
+	}
+	s.occurences[old] = s.occurences[old] + 1
+
+	return strings.ToLower(str)
+}