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// Copyright 2017 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package integrations
import (
"bytes"
"golang.org/x/net/html"
)
type HtmlDoc struct {
doc *html.Node
body *html.Node
}
func NewHtmlParser(content []byte) (*HtmlDoc, error) {
doc, err := html.Parse(bytes.NewReader(content))
if err != nil {
return nil, err
}
return &HtmlDoc{doc: doc}, nil
}
func (doc *HtmlDoc) GetBody() *html.Node {
if doc.body == nil {
var b *html.Node
var f func(*html.Node)
f = func(n *html.Node) {
if n.Type == html.ElementNode && n.Data == "body" {
b = n
return
}
for c := n.FirstChild; c != nil; c = c.NextSibling {
f(c)
}
}
f(doc.doc)
if b != nil {
doc.body = b
} else {
doc.body = doc.doc
}
}
return doc.body
}
func (doc *HtmlDoc) GetAttribute(n *html.Node, key string) (string, bool) {
for _, attr := range n.Attr {
if attr.Key == key {
return attr.Val, true
}
}
return "", false
}
func (doc *HtmlDoc) checkAttr(n *html.Node, attr, val string) bool {
if n.Type == html.ElementNode {
s, ok := doc.GetAttribute(n, attr)
if ok && s == val {
return true
}
}
return false
}
func (doc *HtmlDoc) traverse(n *html.Node, attr, val string) *html.Node {
if doc.checkAttr(n, attr, val) {
return n
}
for c := n.FirstChild; c != nil; c = c.NextSibling {
result := doc.traverse(c, attr, val)
if result != nil {
return result
}
}
return nil
}
func (doc *HtmlDoc) GetElementById(id string) *html.Node {
return doc.traverse(doc.GetBody(), "id", id)
}
func (doc *HtmlDoc) GetInputValueById(id string) string {
inp := doc.GetElementById(id)
if inp == nil {
return ""
}
val, _ := doc.GetAttribute(inp, "value")
return val
}
func (doc *HtmlDoc) GetElementByName(name string) *html.Node {
return doc.traverse(doc.GetBody(), "name", name)
}
func (doc *HtmlDoc) GetInputValueByName(name string) string {
inp := doc.GetElementByName(name)
if inp == nil {
return ""
}
val, _ := doc.GetAttribute(inp, "value")
return val
}
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