phase2: markdown converter with goldmark, chroma, and ASCII-translit anchors

internal/converter/slugger.go

@@ -0,0 +1,26 @@
+package converter
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+
+	"github.com/mozillazg/go-unidecode"
+)
+
+var slugRe = regexp.MustCompile(`[^a-z0-9]+`)
+
+func translitSlug(s string, used map[string]int) string {
+	t := strings.ToLower(unidecode.Unidecode(s))
+	t = slugRe.ReplaceAllString(t, "-")
+	t = strings.Trim(t, "-")
+	if t == "" {
+		t = "section"
+	}
+	if n, ok := used[t]; ok && n > 0 {
+		used[t] = n + 1
+		return fmt.Sprintf("%s-%d", t, n)
+	}
+	used[t] = 1
+	return t
+}