feat: articles format option with markdown new default

internal/infrastructure/markdown/converter.go

@@ -0,0 +1,33 @@
+package markdown
+
+import (
+	domain "RenewCMS/internal/domain/article"
+)
+
+type Converter struct{}
+
+var _ domain.BodyRenderer = &Converter{}
+
+func NewConverter() *Converter {
+	return &Converter{}
+}
+
+func (c *Converter) Render(html string, format domain.BodyFormat) (string, error) {
+	switch format {
+	case domain.BodyFormatHTML:
+		return html, nil
+	case domain.BodyFormatMarkdown:
+		blocks, err := parseBlocks(html)
+		if err != nil {
+			return "", err
+		}
+		return renderMarkdown(blocks), nil
+	case domain.BodyFormatJSON:
+		blocks, err := parseBlocks(html)
+		if err != nil {
+			return "", err
+		}
+		return renderJSON(blocks)
+	}
+	return "", domain.ErrUnsupportedBodyFormat
+}