From 9efd91668a2fec1fb09093f35a06724ac1c3208c Mon Sep 17 00:00:00 2001
From: Shinku <17696928+Shinku-Chen@users.noreply.github.com>
Date: Thu, 24 Oct 2024 11:05:14 +0800
Subject: [PATCH] NewXMLElement add index

---
 colly.go           |  4 ++--
 xmlelement.go      |  5 ++++-
 xmlelement_test.go | 10 +++++-----
 3 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/colly.go b/colly.go
index ae74b7c3e..18b85a0fa 100644
--- a/colly.go
+++ b/colly.go
@@ -1199,8 +1199,8 @@ func (c *Collector) handleOnXML(resp *Response) error {
 		}
 
 		for _, cc := range c.xmlCallbacks {
-			for _, n := range htmlquery.Find(doc, cc.Query) {
-				e := NewXMLElementFromHTMLNode(resp, n)
+			for i, n := range htmlquery.Find(doc, cc.Query) {
+				e := NewXMLElementFromHTMLNode(resp, n, i)
 				if c.debugger != nil {
 					c.debugger.Event(createEvent("xml", resp.Request.ID, c.ID, map[string]string{
 						"selector": cc.Query,
diff --git a/xmlelement.go b/xmlelement.go
index 857900e85..e908b3379 100644
--- a/xmlelement.go
+++ b/xmlelement.go
@@ -37,10 +37,12 @@ type XMLElement struct {
 	// based on how the XMLElement was created.
 	DOM    interface{}
 	isHTML bool
+	// Index stores the position of the current element within all the elements matched by an OnXML callback
+	Index int
 }
 
 // NewXMLElementFromHTMLNode creates a XMLElement from a html.Node.
-func NewXMLElementFromHTMLNode(resp *Response, s *html.Node) *XMLElement {
+func NewXMLElementFromHTMLNode(resp *Response, s *html.Node, idx int) *XMLElement {
 	return &XMLElement{
 		Name:       s.Data,
 		Request:    resp.Request,
@@ -49,6 +51,7 @@ func NewXMLElementFromHTMLNode(resp *Response, s *html.Node) *XMLElement {
 		DOM:        s,
 		attributes: s.Attr,
 		isHTML:     true,
+		Index:      idx,
 	}
 }
 
diff --git a/xmlelement_test.go b/xmlelement_test.go
index 90a434826..5597c1b00 100644
--- a/xmlelement_test.go
+++ b/xmlelement_test.go
@@ -52,7 +52,7 @@ func TestAttr(t *testing.T) {
 	resp := &colly.Response{StatusCode: 200, Body: []byte(htmlPage)}
 	doc, _ := htmlquery.Parse(strings.NewReader(htmlPage))
 	xmlNode := htmlquery.FindOne(doc, "/html")
-	xmlElem := colly.NewXMLElementFromHTMLNode(resp, xmlNode)
+	xmlElem := colly.NewXMLElementFromHTMLNode(resp, xmlNode, 0)
 
 	if xmlElem.Attr("xmlns") != "http://www.w3.org/1999/xhtml" {
 		t.Fatalf("failed xmlns attribute test: %v != http://www.w3.org/1999/xhtml", xmlElem.Attr("xmlns"))
@@ -67,7 +67,7 @@ func TestChildText(t *testing.T) {
 	resp := &colly.Response{StatusCode: 200, Body: []byte(htmlPage)}
 	doc, _ := htmlquery.Parse(strings.NewReader(htmlPage))
 	xmlNode := htmlquery.FindOne(doc, "/html")
-	xmlElem := colly.NewXMLElementFromHTMLNode(resp, xmlNode)
+	xmlElem := colly.NewXMLElementFromHTMLNode(resp, xmlNode, 0)
 
 	if text := xmlElem.ChildText("//p"); text != "This is a regular text paragraph." {
 		t.Fatalf("failed child tag test: %v != This is a regular text paragraph.", text)
@@ -81,7 +81,7 @@ func TestChildTexts(t *testing.T) {
 	resp := &colly.Response{StatusCode: 200, Body: []byte(htmlPage)}
 	doc, _ := htmlquery.Parse(strings.NewReader(htmlPage))
 	xmlNode := htmlquery.FindOne(doc, "/html")
-	xmlElem := colly.NewXMLElementFromHTMLNode(resp, xmlNode)
+	xmlElem := colly.NewXMLElementFromHTMLNode(resp, xmlNode, 0)
 	expected := []string{"First bullet of a bullet list.", "This is the second bullet."}
 	if texts := xmlElem.ChildTexts("//li"); reflect.DeepEqual(texts, expected) == false {
 		t.Fatalf("failed child tags test: %v != %v", texts, expected)
@@ -94,7 +94,7 @@ func TestChildAttr(t *testing.T) {
 	resp := &colly.Response{StatusCode: 200, Body: []byte(htmlPage)}
 	doc, _ := htmlquery.Parse(strings.NewReader(htmlPage))
 	xmlNode := htmlquery.FindOne(doc, "/html")
-	xmlElem := colly.NewXMLElementFromHTMLNode(resp, xmlNode)
+	xmlElem := colly.NewXMLElementFromHTMLNode(resp, xmlNode, 0)
 
 	if attr := xmlElem.ChildAttr("/body/ul/li[1]", "class"); attr != "list-item-1" {
 		t.Fatalf("failed child attribute test: %v != list-item-1", attr)
@@ -108,7 +108,7 @@ func TestChildAttrs(t *testing.T) {
 	resp := &colly.Response{StatusCode: 200, Body: []byte(htmlPage)}
 	doc, _ := htmlquery.Parse(strings.NewReader(htmlPage))
 	xmlNode := htmlquery.FindOne(doc, "/html")
-	xmlElem := colly.NewXMLElementFromHTMLNode(resp, xmlNode)
+	xmlElem := colly.NewXMLElementFromHTMLNode(resp, xmlNode, 0)
 
 	attrs := xmlElem.ChildAttrs("/body/ul/li", "class")
 	if len(attrs) != 2 {