You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
owl-blogs/post.go

418 lines
8.8 KiB

package owl
import (
"bytes"
"errors"
"net/url"
"os"
"path"
"sort"
"sync"
"time"
"github.com/yuin/goldmark"
"github.com/yuin/goldmark/extension"
"github.com/yuin/goldmark/parser"
"github.com/yuin/goldmark/renderer/html"
"gopkg.in/yaml.v2"
)
type Post struct {
user *User
id string
title string
metaLoaded bool
meta PostMeta
wmLock sync.Mutex
}
type Reply struct {
Url string `yaml:"url"`
Text string `yaml:"text"`
}
type PostMeta struct {
Type string `yaml:"type"`
Title string `yaml:"title"`
Description string `yaml:"description"`
Aliases []string `yaml:"aliases"`
Date time.Time `yaml:"date"`
Draft bool `yaml:"draft"`
Reply Reply `yaml:"reply"`
}
func (pm PostMeta) FormattedDate() string {
return pm.Date.Format("02-01-2006 15:04:05")
}
func (pm *PostMeta) UnmarshalYAML(unmarshal func(interface{}) error) error {
type T struct {
Type string `yaml:"type"`
Title string `yaml:"title"`
Description string `yaml:"description"`
Aliases []string `yaml:"aliases"`
Draft bool `yaml:"draft"`
Reply Reply `yaml:"reply"`
}
type S struct {
Date string `yaml:"date"`
}
var t T
var s S
if err := unmarshal(&t); err != nil {
return err
}
if err := unmarshal(&s); err != nil {
return err
}
pm.Type = t.Type
if pm.Type == "" {
pm.Type = "article"
}
pm.Title = t.Title
pm.Description = t.Description
pm.Aliases = t.Aliases
pm.Draft = t.Draft
pm.Reply = t.Reply
possibleFormats := []string{
"2006-01-02",
time.Layout,
time.ANSIC,
time.UnixDate,
time.RubyDate,
time.RFC822,
time.RFC822Z,
time.RFC850,
time.RFC1123,
time.RFC1123Z,
time.RFC3339,
time.RFC3339Nano,
time.Stamp,
time.StampMilli,
time.StampMicro,
time.StampNano,
}
for _, format := range possibleFormats {
if t, err := time.Parse(format, s.Date); err == nil {
pm.Date = t
break
}
}
return nil
}
type PostWebmetions struct {
Incoming []WebmentionIn `ymal:"incoming"`
Outgoing []WebmentionOut `ymal:"outgoing"`
}
func (post *Post) Id() string {
return post.id
}
func (post *Post) User() *User {
return post.user
}
func (post *Post) Dir() string {
return path.Join(post.user.Dir(), "public", post.id)
}
func (post *Post) IncomingWebmentionsFile() string {
return path.Join(post.Dir(), "incoming_webmentions.yml")
}
func (post *Post) OutgoingWebmentionsFile() string {
return path.Join(post.Dir(), "outgoing_webmentions.yml")
}
func (post *Post) MediaDir() string {
return path.Join(post.Dir(), "media")
}
func (post *Post) UrlPath() string {
return post.user.UrlPath() + "posts/" + post.id + "/"
}
func (post *Post) FullUrl() string {
return post.user.FullUrl() + "posts/" + post.id + "/"
}
func (post *Post) UrlMediaPath(filename string) string {
return post.UrlPath() + "media/" + filename
}
func (post *Post) Title() string {
return post.title
}
func (post *Post) ContentFile() string {
return path.Join(post.Dir(), "index.md")
}
func (post *Post) Meta() PostMeta {
if !post.metaLoaded {
post.LoadMeta()
}
return post.meta
}
func (post *Post) Content() []byte {
// read file
data, _ := os.ReadFile(post.ContentFile())
return data
}
func (post *Post) RenderedContent() string {
data := post.Content()
// trim yaml block
// TODO this can be done nicer
trimmedData := bytes.TrimSpace(data)
// check first line is ---
if string(trimmedData[0:4]) == "---\n" {
trimmedData = trimmedData[4:]
// find --- end
end := bytes.Index(trimmedData, []byte("\n---\n"))
if end != -1 {
data = trimmedData[end+5:]
}
}
options := goldmark.WithRendererOptions()
if config, _ := post.user.repo.Config(); config.AllowRawHtml {
options = goldmark.WithRendererOptions(
html.WithUnsafe(),
)
}
markdown := goldmark.New(
options,
goldmark.WithExtensions(
// meta.Meta,
extension.GFM,
),
)
var buf bytes.Buffer
context := parser.NewContext()
if err := markdown.Convert(data, &buf, parser.WithContext(context)); err != nil {
panic(err)
}
return buf.String()
}
func (post *Post) Aliases() []string {
return post.Meta().Aliases
}
func (post *Post) LoadMeta() error {
data := post.Content()
// get yaml metadata block
meta := PostMeta{}
trimmedData := bytes.TrimSpace(data)
// check first line is ---
if string(trimmedData[0:4]) == "---\n" {
trimmedData = trimmedData[4:]
// find --- end
end := bytes.Index(trimmedData, []byte("---\n"))
if end != -1 {
metaData := trimmedData[:end]
err := yaml.Unmarshal(metaData, &meta)
if err != nil {
return err
}
}
}
post.meta = meta
return nil
}
func (post *Post) IncomingWebmentions() []WebmentionIn {
// return parsed webmentions
fileName := post.IncomingWebmentionsFile()
if !fileExists(fileName) {
return []WebmentionIn{}
}
webmentions := []WebmentionIn{}
loadFromYaml(fileName, &webmentions)
return webmentions
}
func (post *Post) OutgoingWebmentions() []WebmentionOut {
// return parsed webmentions
fileName := post.OutgoingWebmentionsFile()
if !fileExists(fileName) {
return []WebmentionOut{}
}
webmentions := []WebmentionOut{}
loadFromYaml(fileName, &webmentions)
return webmentions
}
// PersistWebmentionOutgoing persists incoming webmention
func (post *Post) PersistIncomingWebmention(webmention WebmentionIn) error {
post.wmLock.Lock()
defer post.wmLock.Unlock()
wms := post.IncomingWebmentions()
// if target is not in status, add it
replaced := false
for i, t := range wms {
if t.Source == webmention.Source {
wms[i].UpdateWith(webmention)
replaced = true
break
}
}
if !replaced {
wms = append(wms, webmention)
}
err := saveToYaml(post.IncomingWebmentionsFile(), wms)
if err != nil {
return err
}
return nil
}
// PersistOutgoingWebmention persists a webmention to the webmention file.
func (post *Post) PersistOutgoingWebmention(webmention *WebmentionOut) error {
post.wmLock.Lock()
defer post.wmLock.Unlock()
wms := post.OutgoingWebmentions()
// if target is not in webmention, add it
replaced := false
for i, t := range wms {
if t.Target == webmention.Target {
wms[i].UpdateWith(*webmention)
replaced = true
break
}
}
if !replaced {
wms = append(wms, *webmention)
}
err := saveToYaml(post.OutgoingWebmentionsFile(), wms)
if err != nil {
return err
}
return nil
}
func (post *Post) AddIncomingWebmention(source string) error {
// Check if file already exists
wm := WebmentionIn{
Source: source,
}
defer func() {
go post.EnrichWebmention(wm)
}()
return post.PersistIncomingWebmention(wm)
}
func (post *Post) EnrichWebmention(webmention WebmentionIn) error {
resp, err := post.user.repo.HttpClient.Get(webmention.Source)
if err == nil {
entry, err := post.user.repo.Parser.ParseHEntry(resp)
if err == nil {
webmention.Title = entry.Title
return post.PersistIncomingWebmention(webmention)
}
}
return err
}
func (post *Post) ApprovedIncomingWebmentions() []WebmentionIn {
webmentions := post.IncomingWebmentions()
approved := []WebmentionIn{}
for _, webmention := range webmentions {
if webmention.ApprovalStatus == "approved" {
approved = append(approved, webmention)
}
}
// sort by retrieved date
sort.Slice(approved, func(i, j int) bool {
return approved[i].RetrievedAt.After(approved[j].RetrievedAt)
})
return approved
}
// ScanForLinks scans the post content for links and adds them to the
// `status.yml` file for the post. The links are not scanned by this function.
func (post *Post) ScanForLinks() error {
// this could be done in markdown parsing, but I don't want to
// rely on goldmark for this (yet)
postHtml := post.RenderedContent()
links, _ := post.user.repo.Parser.ParseLinksFromString(postHtml)
// add reply url if set
if post.Meta().Reply.Url != "" {
links = append(links, post.Meta().Reply.Url)
}
for _, link := range links {
post.PersistOutgoingWebmention(&WebmentionOut{
Target: link,
})
}
return nil
}
func (post *Post) SendWebmention(webmention WebmentionOut) error {
defer post.PersistOutgoingWebmention(&webmention)
// if last scan is less than 7 days ago, don't send webmention
if webmention.ScannedAt.After(time.Now().Add(-7*24*time.Hour)) && !webmention.Supported {
return errors.New("did not scan. Last scan was less than 7 days ago")
}
webmention.ScannedAt = time.Now()
resp, err := post.user.repo.HttpClient.Get(webmention.Target)
if err != nil {
webmention.Supported = false
return err
}
endpoint, err := post.user.repo.Parser.GetWebmentionEndpoint(resp)
if err != nil {
webmention.Supported = false
return err
}
webmention.Supported = true
// send webmention
payload := url.Values{}
payload.Set("source", post.FullUrl())
payload.Set("target", webmention.Target)
_, err = post.user.repo.HttpClient.PostForm(endpoint, payload)
if err != nil {
return err
}
// update webmention status
webmention.LastSentAt = time.Now()
return nil
}