编辑帮助功能

help_markdown.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+	"bytes"
+	"fmt"
+
+	"github.com/microcosm-cc/bluemonday"
+	"github.com/yuin/goldmark"
+	"github.com/yuin/goldmark/extension"
+)
+
+func renderHelpMarkdown(markdown string) (string, error) {
+	var buf bytes.Buffer
+	md := goldmark.New(goldmark.WithExtensions(extension.GFM))
+	if err := md.Convert([]byte(markdown), &buf); err != nil {
+		return "", fmt.Errorf("render markdown: %w", err)
+	}
+	policy := bluemonday.UGCPolicy()
+	policy.RequireNoFollowOnLinks(false)
+	return policy.Sanitize(buf.String()), nil
+}