2017-07-09 01:57:41 +02:00
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package plugins
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import (
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"bytes"
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"fmt"
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"io"
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2017-07-09 03:41:35 +02:00
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"strings"
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"text/template"
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2017-07-09 01:57:41 +02:00
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"github.com/osteele/gojekyll/pages"
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)
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2017-07-09 04:47:50 +02:00
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type jekyllRedirectFromPlugin struct{ plugin }
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2017-07-09 01:57:41 +02:00
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var redirectTemplate *template.Template
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func init() {
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2017-07-09 04:47:50 +02:00
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register("jekyll-redirect-from", jekyllRedirectFromPlugin{})
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2017-07-09 07:22:32 +02:00
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tmpl, err := template.New("redirect_from").Parse(redirectFromTemplateSource)
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2017-07-09 01:57:41 +02:00
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if err != nil {
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panic(err)
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}
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redirectTemplate = tmpl
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}
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2017-07-09 04:47:50 +02:00
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func (p jekyllRedirectFromPlugin) PostRead(site Site) error {
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2017-07-09 01:57:41 +02:00
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redirections := []pages.Document{}
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for _, p := range site.Pages() {
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rd, ok := p.FrontMatter()["redirect_from"]
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if ok {
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switch rd := rd.(type) {
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case string:
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2017-07-09 03:41:35 +02:00
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siteurl := site.Config().AbsoluteURL
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baseurl := site.Config().BaseURL
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2017-07-09 07:22:32 +02:00
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var p = redirectionDoc{From: rd, To: strings.Join([]string{siteurl, baseurl, p.Permalink()}, "")}
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2017-07-09 01:57:41 +02:00
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redirections = append(redirections, &p)
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default:
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fmt.Printf("unimplemented redirect_from type: %T\n", rd)
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}
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}
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rd, ok = p.FrontMatter()["redirect_to"]
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if ok {
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switch rd := rd.(type) {
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case string:
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2017-07-09 07:22:32 +02:00
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r := redirectionDoc{From: rd, To: p.Permalink()}
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2017-07-09 01:57:41 +02:00
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p.SetContent(r.Content())
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default:
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fmt.Printf("unimplemented redirect_from type: %T\n", rd)
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}
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}
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}
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for _, p := range redirections {
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site.AddDocument(p, true)
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}
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return nil
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}
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2017-07-09 07:22:32 +02:00
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type redirectionDoc struct {
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From string
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To string
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}
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func (d *redirectionDoc) Permalink() string { return d.From }
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func (d *redirectionDoc) SourcePath() string { return "" } // FIXME bad design
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func (d *redirectionDoc) OutputExt() string { return ".html" }
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func (d *redirectionDoc) Published() bool { return true }
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func (d *redirectionDoc) Static() bool { return false } // FIXME means different things to different callers
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func (d *redirectionDoc) Categories() []string { return []string{} }
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func (d *redirectionDoc) Tags() []string { return []string{} }
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func (d *redirectionDoc) Content() []byte {
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buf := new(bytes.Buffer)
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if err := redirectTemplate.Execute(buf, d); err != nil {
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panic(err)
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}
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return buf.Bytes()
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}
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2017-07-10 19:23:51 +02:00
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func (d *redirectionDoc) Write(w io.Writer) error {
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2017-07-09 07:22:32 +02:00
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return redirectTemplate.Execute(w, d)
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}
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2017-07-09 01:57:41 +02:00
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// Adapted from https://github.com/jekyll/jekyll-redirect-from
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2017-07-09 07:22:32 +02:00
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const redirectFromTemplateSource = `<!DOCTYPE html>
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2017-07-09 01:57:41 +02:00
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<html lang="en-US">
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<meta charset="utf-8">
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2017-07-09 03:41:35 +02:00
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<title>Redirecting…</title>
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2017-07-09 01:57:41 +02:00
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<link rel="canonical" href="{{ .To }}">
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<meta http-equiv="refresh" content="0; url={{ .To }}">
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<meta name="robots" content="noindex">
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2017-07-09 03:41:35 +02:00
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<h1>Redirecting…</h1>
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2017-07-09 01:57:41 +02:00
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<a href="{{ .To }}">Click here if you are not redirected.</a>
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<script>location="{{ .To }}"</script>
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</html>`
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