Initial Renderer implementation

Author: stanistan

renderer.go

@@ -0,0 +1,39 @@
+package veun
+
+import (
+	"bytes"
+	"fmt"
+	"html/template"
+)
+
+type RenderFunc func(r Renderable) (template.HTML, error)
+
+type Renderable interface {
+	Template() (*template.Template, error)
+	TemplateData() (any, error)
+}
+
+func Render(r Renderable) (template.HTML, error) {
+	var empty template.HTML
+
+	tpl, err := r.Template()
+	if err != nil {
+		return empty, err
+	}
+
+	if tpl == nil {
+		return empty, fmt.Errorf("missing template")
+	}
+
+	data, err := r.TemplateData()
+	if err != nil {
+		return empty, err
+	}
+
+	var bs bytes.Buffer
+	if err := tpl.Execute(&bs, data); err != nil {
+		return empty, err
+	}
+
+	return template.HTML(bs.String()), nil
+}