127 lines
2.8 KiB
Go
127 lines
2.8 KiB
Go
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///bin/sh -c true; exec /usr/bin/env go run "$0" "$@"
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package main
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import (
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"encoding/json"
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"io/ioutil"
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"net/url"
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"os"
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"os/exec"
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"path"
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"strings"
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"text/template"
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"time"
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"github.com/russross/blackfriday/v2"
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)
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const (
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CACHE_FOLDER = "cache"
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)
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const RSS_TEMPLATE string = `<?xml version="1.0" encoding="UTF-8"?>
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<rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
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<channel>
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<title><![CDATA[ {{.ID}} ]]></title>
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<link><![CDATA[ {{.Server}}/{{.ID}} ]]></link>
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<description><![CDATA[ {{.ID}} ]]></description>
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<item>
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<title><![CDATA[ {{.Server}}/{{.ID}} ]]></title>
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<content:encoded><![CDATA[ {{.Content}} ]]></content:encoded>
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<guid><![CDATA[ {{.Server}}/{{.ID}}/{{.Modified.Format "20060102-150405"}} ]]></guid>
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<link><![CDATA[ {{.Server}}/{{.ID}} ]]></link>
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<pubDate>{{.Modified.Format "Mon, 02 Jan 2006 15:04:05 -0700"}}</pubDate>
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</item>
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</channel>
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</rss>
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`
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func optPanic(err error) {
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if err != nil {
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panic(err)
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}
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}
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func (n *Note) filename() string {
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return path.Join(CACHE_FOLDER, n.ID)
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}
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func (n *Note) setContent() {
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cmd := exec.Command("hedgedoc", "export", "--md", n.ID)
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cmd.Env = os.Environ()
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cmd.Env = append(cmd.Env, "HEDGEDOC_SERVER="+n.Server)
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if n.CookiesFile != "" {
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cmd.Env = append(cmd.Env, "HEDGEDOC_COOKIES_FILE="+n.CookiesFile)
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}
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filename, err := cmd.Output()
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optPanic(err)
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b, err := ioutil.ReadFile(strings.TrimSpace(string(filename)))
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optPanic(err)
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n.Content = string(blackfriday.Run(b))
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n.Modified = time.Now()
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}
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func unmarshalNoteObject(filename string) Note {
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bytes, err := ioutil.ReadFile(filename)
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if err != nil {
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bytes = []byte{}
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}
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var noteObject Note
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err = json.Unmarshal(bytes, ¬eObject)
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if err != nil {
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noteObject = Note{}
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}
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return noteObject
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}
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func marshalNoteObject(filename string, note Note) {
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bytes, err := json.MarshalIndent(note, "", " ")
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optPanic(err)
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err = ioutil.WriteFile(filename, bytes, 0644)
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optPanic(err)
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}
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func (newNote *Note) genRSS() {
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var chosen Note
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oldNote := unmarshalNoteObject(newNote.filename())
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if oldNote.Content != newNote.Content {
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chosen = *newNote
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} else {
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chosen = oldNote
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}
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err := rssTemplate.Execute(os.Stdout, chosen)
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optPanic(err)
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marshalNoteObject(newNote.filename(), chosen)
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}
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type Note struct {
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Server string
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ID string
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Content string
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Modified time.Time
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CookiesFile string
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}
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func NewNote(server string, ID string) *Note {
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n := &Note{Server: server, ID: ID}
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n.setContent()
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return n
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}
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var rssTemplate *template.Template
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func rssify(noteURL string) {
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u, err := url.Parse(noteURL)
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optPanic(err)
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NewNote(u.Scheme+"://"+u.Host, u.Path[1:]).genRSS()
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}
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func main() {
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rssTemplate = template.Must(template.New("rss").Parse(RSS_TEMPLATE))
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os.Mkdir(CACHE_FOLDER, 0755)
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// todo: Cookie-file flag
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rssify(os.Args[1])
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}
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