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// Copyright 2017 Frédéric Guillot. All rights reserved.
// Use of this source code is governed by the Apache 2.0
// license that can be found in the LICENSE file.
package rewrite
import (
"regexp"
"strings"
"github.com/PuerkitoBio/goquery"
)
var rewriteRules = []func(string, string) string{
func(url, content string) string {
re := regexp.MustCompile(`youtube\.com/watch\?v=(.*)`)
matches := re.FindStringSubmatch(url)
if len(matches) == 2 {
video := `<iframe width="650" height="350" frameborder="0" src="https://www.youtube-nocookie.com/embed/` + matches[1] + `" allowfullscreen></iframe>`
return video + "<p>" + content + "</p>"
}
return content
},
func(url, content string) string {
if strings.HasPrefix(url, "https://xkcd.com") {
doc, err := goquery.NewDocumentFromReader(strings.NewReader(content))
if err != nil {
return content
}
imgTag := doc.Find("img").First()
if titleAttr, found := imgTag.Attr("title"); found {
return content + `<blockquote cite="` + url + `">` + titleAttr + "</blockquote>"
}
}
return content
},
}
func Rewriter(url, content string) string {
for _, rewriteRule := range rewriteRules {
content = rewriteRule(url, content)
}
return content
}
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