reorganizing content-related packages

src/content/htmlutil/utils.go

@@ -0,0 +1,41 @@
+package htmlutil
+
+import (
+	"strings"
+
+	"golang.org/x/net/html"
+)
+
+func HTML(node *html.Node) string {
+	writer := strings.Builder{}
+	html.Render(&writer, node)
+	return writer.String()
+}
+
+func InnerHTML(node *html.Node) string {
+	writer := strings.Builder{}
+	for c := node.FirstChild; c != nil; c = c.NextSibling {
+		html.Render(&writer, c)
+	}
+	return writer.String()
+}
+
+func Attr(node *html.Node, key string) string {
+	for _, a := range node.Attr {
+		if strings.EqualFold(a.Key, key) {
+			return a.Val
+		}
+	}
+	return ""
+}
+
+func Text(node *html.Node) string {
+	text := make([]string, 0)
+	isTextNode := func(n *html.Node) bool {
+		return n.Type == html.TextNode
+	}
+	for _, n := range FindNodes(node, isTextNode) {
+		text = append(text, strings.TrimSpace(n.Data))
+	}
+	return strings.Join(text, " ")
+}