122 lines
3.4 KiB
Go
122 lines
3.4 KiB
Go
package recv
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import (
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"brainbaking.com/go-jamming/app/mf"
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"brainbaking.com/go-jamming/common"
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"brainbaking.com/go-jamming/rest"
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"encoding/json"
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"io/fs"
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"io/ioutil"
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"os"
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"regexp"
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"strings"
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"github.com/rs/zerolog/log"
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"willnorris.com/go/microformats"
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)
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// used as a "class" to iject dependencies, just to be able to test. Do NOT like htis.
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// Is there a better way? e.g. in validate, I just pass rest.Client as an arg. Not great either.
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type Receiver struct {
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RestClient rest.Client
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Conf *common.Config
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}
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func (recv *Receiver) Receive(wm mf.Mention) {
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log.Info().Stringer("wm", wm).Msg("OK: looks valid")
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_, body, geterr := recv.RestClient.GetBody(wm.Source)
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if geterr != nil {
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log.Warn().Err(geterr).Msg(" ABORT: invalid url")
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recv.deletePossibleOlderWebmention(wm)
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return
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}
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recv.processSourceBody(body, wm)
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}
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// Deletes a possible webmention. Ignores remove errors.
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func (recv *Receiver) deletePossibleOlderWebmention(wm mf.Mention) {
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os.Remove(wm.AsPath(recv.Conf))
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}
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func (recv *Receiver) processSourceBody(body string, wm mf.Mention) {
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if !strings.Contains(body, wm.Target) {
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log.Warn().Str("target", wm.Target).Msg("ABORT: no mention of target found in html src of source!")
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return
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}
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data := microformats.Parse(strings.NewReader(body), wm.SourceUrl())
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indieweb := recv.convertBodyToIndiewebData(body, wm, mf.HEntry(data))
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if err := recv.saveWebmentionToDisk(wm, indieweb); err != nil {
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log.Err(err).Msg("Unable to save Webmention to disk")
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}
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log.Info().Str("file", wm.AsPath(recv.Conf)).Msg("OK: Webmention processed.")
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}
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func (recv *Receiver) convertBodyToIndiewebData(body string, wm mf.Mention, hEntry *microformats.Microformat) *mf.IndiewebData {
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if hEntry == nil {
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return recv.parseBodyAsNonIndiewebSite(body, wm)
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}
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return recv.parseBodyAsIndiewebSite(hEntry, wm)
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}
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func (recv *Receiver) saveWebmentionToDisk(wm mf.Mention, indieweb *mf.IndiewebData) error {
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jsonData, jsonErr := json.Marshal(indieweb)
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if jsonErr != nil {
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return jsonErr
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}
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err := ioutil.WriteFile(wm.AsPath(recv.Conf), jsonData, fs.ModePerm)
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if err != nil {
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return err
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}
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return nil
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}
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// see https://github.com/willnorris/microformats/blob/main/microformats.go
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func (recv *Receiver) parseBodyAsIndiewebSite(hEntry *microformats.Microformat, wm mf.Mention) *mf.IndiewebData {
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return &mf.IndiewebData{
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Name: mf.Str(hEntry, "name"),
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Author: mf.IndiewebAuthor{
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Name: mf.DetermineAuthorName(hEntry),
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Picture: mf.Str(mf.Prop(hEntry, "author"), "photo"),
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},
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Content: mf.Content(hEntry),
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Url: mf.Url(hEntry, wm.Source),
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Published: mf.Published(hEntry, recv.Conf.UtcOffset),
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Source: wm.Source,
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Target: wm.Target,
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IndiewebType: mf.Type(hEntry),
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}
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}
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var (
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titleRegexp = regexp.MustCompile(`<title>(.*?)<\/title>`)
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)
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func (recv *Receiver) parseBodyAsNonIndiewebSite(body string, wm mf.Mention) *mf.IndiewebData {
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title := nonIndiewebTitle(body, wm)
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return &mf.IndiewebData{
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Author: mf.IndiewebAuthor{
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Name: wm.Source,
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},
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Name: title,
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Content: title,
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Published: mf.PublishedNow(recv.Conf.UtcOffset),
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Url: wm.Source,
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IndiewebType: mf.TypeMention,
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Source: wm.Source,
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Target: wm.Target,
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}
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}
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func nonIndiewebTitle(body string, wm mf.Mention) string {
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titleMatch := titleRegexp.FindStringSubmatch(body)
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title := wm.Source
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if titleMatch != nil {
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title = titleMatch[1]
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}
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return title
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}
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