*: Reorganize code

renderer/link.go

@@ -0,0 +1,90 @@
+package renderer
+
+import (
+	"github.com/yuin/goldmark/ast"
+	"github.com/yuin/goldmark/renderer"
+	"github.com/yuin/goldmark/renderer/html"
+	"github.com/yuin/goldmark/util"
+)
+
+type ConfluenceLinkRenderer struct {
+	html.Config
+}
+
+// NewConfluenceRenderer creates a new instance of the ConfluenceRenderer
+func NewConfluenceLinkRenderer(opts ...html.Option) renderer.NodeRenderer {
+	return &ConfluenceLinkRenderer{
+		Config: html.NewConfig(),
+	}
+}
+
+// RegisterFuncs implements NodeRenderer.RegisterFuncs .
+func (r *ConfluenceLinkRenderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {
+	reg.Register(ast.KindLink, r.renderLink)
+}
+
+// renderLink renders links specifically for confluence
+func (r *ConfluenceLinkRenderer) renderLink(writer util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	n := node.(*ast.Link)
+	if string(n.Destination[0:3]) == "ac:" {
+		if entering {
+			_, err := writer.Write([]byte("<ac:link><ri:page ri:content-title=\""))
+			if err != nil {
+				return ast.WalkStop, err
+			}
+
+			if len(n.Destination) < 4 {
+				_, err := writer.Write(node.Text(source))
+				if err != nil {
+					return ast.WalkStop, err
+				}
+			} else {
+				_, err := writer.Write(n.Destination[3:])
+				if err != nil {
+					return ast.WalkStop, err
+				}
+
+			}
+			_, err = writer.Write([]byte("\"/><ac:plain-text-link-body><![CDATA["))
+			if err != nil {
+				return ast.WalkStop, err
+			}
+
+			_, err = writer.Write(node.Text(source))
+			if err != nil {
+				return ast.WalkStop, err
+			}
+
+			_, err = writer.Write([]byte("]]></ac:plain-text-link-body></ac:link>"))
+			if err != nil {
+				return ast.WalkStop, err
+			}
+		}
+		return ast.WalkSkipChildren, nil
+	}
+	return r.goldmarkRenderLink(writer, source, node, entering)
+}
+
+// goldmarkRenderLink is the default renderLink implementation from https://github.com/yuin/goldmark/blob/9d6f314b99ca23037c93d76f248be7b37de6220a/renderer/html/html.go#L552
+func (r *ConfluenceLinkRenderer) goldmarkRenderLink(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	n := node.(*ast.Link)
+	if entering {
+		_, _ = w.WriteString("<a href=\"")
+		if r.Unsafe || !html.IsDangerousURL(n.Destination) {
+			_, _ = w.Write(util.EscapeHTML(util.URLEscape(n.Destination, true)))
+		}
+		_ = w.WriteByte('"')
+		if n.Title != nil {
+			_, _ = w.WriteString(` title="`)
+			r.Writer.Write(w, n.Title)
+			_ = w.WriteByte('"')
+		}
+		if n.Attributes() != nil {
+			html.RenderAttributes(w, n, html.LinkAttributeFilter)
+		}
+		_ = w.WriteByte('>')
+	} else {
+		_, _ = w.WriteString("</a>")
+	}
+	return ast.WalkContinue, nil
+}