Implement the Post Type Discovery algorithm

[sebsel]

I don't know if this is the right place, but since I was trying to capture some of php-comments shortcomings, here is a shortcoming of XRay I found :)

sebsel a thing to note: php-comments gives a 'type' with values like 'reply' and 'like', but XRay just gives 'type=entry' with a 'like-of'. So they do different things. https://chat.indieweb.org/dev/2017-01-02#t1483372296121000

https://www.w3.org/TR/post-type-discovery/

[aaronpk]

XRay's type property is meant to represent the Microformats2 vocabulary of the object, rather than the post-type-discovery type of the post. So far I haven't needed a type=like property from XRay, do you have a use case for that? I could see adding a new property that indicates that.

[sebsel]

Well it's just that php-comments does more than XRay does currently. But that's no good reason.

Thinking about it: yes, I actually use this. https://indieweb.org/facepile#Sebastiaan_Andeweg

My webmentions are sorted by the type-field from php-comments. (That's how the plugin originally worked.) I use it to display in the facepile, with proper icon, or as a comment below it.

Of course I can write my own logic for it, which I did today to sort my own posts in my indexing database. I had enough of writing checks like that all the time, and creating separate bool fields in my database table. (An entry with a name is an article, but a bookmark with a name is no article.) The database-example is NOT a use case for XRay though.

Below is my current $page->postType() method (in Kirby), including commented-out things that I don't use, but found on the wiki.

  public function postType() {
    if($this->has('like_of'))     return 'like';
    if($this->has('bookmark_of')) return 'bookmark';
  //if($this->has('tag_of'))      return 'tag';
    if($this->has('repost_of'))   return 'repost';
    if($this->has('read_of'))     return 'read'; // << haven't implemented myself, now
    if($this->has('watch_of'))    return 'watch'; // << posting as text notes, but I have them!
    if($this->has('checkin'))     return 'checkin';
  //if($this->has('invitee'))     return 'invitation';
    if($this->has('rsvp'))        return 'rsvp';
    if($this->has('in_reply_to')) return 'reply';
    if($this->type() == 'event')  return 'event';
    if($this->type() == 'review') return 'review';
    if($this->has('wrote'))       return 'wrote';  // << is one is for myself only :/
    if($this->has('video'))       return 'video';
    if($this->has('photo'))       return 'photo';
    if($this->has('name'))        return 'article';
    if($this->has('text'))        return 'note'; // << 'text' = 'content'
    return 'entry';
  }

Oh, and I totally agree on keeping 'type' for Mf2 :)

[sebsel]

New use case! :o

At this moment I display likes as <3 Seb vindt [dit] leuk. (Seb likes [this]). I am changing this today by having XRay looking up the liked/bookmarked url. I am going to use the name field to replace [dit], but sometimes there is no name for a post.

So I'm now writing checks for wether it's a photo, so I can say 'Seb likes a photo by Aaron Parecki', if the original post was a photo. It would be useful if XRay could do that for me. :)

(still writing my own checks now though... it's also not that hard, so maybe it's okay to do it myself)

[aaronpk]

I do think implementing the Post Type Discovery algorithm would be useful. I'll update the issue title accordingly.