[PatreonBridge] Add new bridge

[Roliga]

Fixes #1024.

This bridge includes the information you'd see if you weren't logged in to Patreon, so only a short excerpt of the post content and blurred image previews, but it's the best we can do without authenticating as a user who has subscribed to the creators.

It also uses the undocumented API that the patreon.com page itself uses. See daemionfox/patreon-feed and splitbrain/patreon-rss for projects that do something similar. This does require some trickery to bypass some recently introduced Cloudflare protection though, so hopefully that keeps working.

[teromene]

Thanks for the great bridge !

[xthursdayx]

Now that PR #1343 which allows for private feeds is merged, do you have an idea for how to incorporate private Patreon feeds into your bridge. I tried messing around with it, but didn't get far. Thanks!

Checking out the scripts running on Patreon once I logged in and accessed a page I support, it seems like the two things that would be relevant to getting this working are the beginning of this script:

 <script>
      window.patreon = window.patreon || {};
      window.patreon.apiServer = "www.patreon.com/api";
      window.patreon.webServer = "www.patreon.com";
      window.patreon.userId = "XXXXXXXX";
      window.patreon.csrfSignature = "2XXXXXXXXXXXXXXXXXXXXXXXXX";
      window.patreon.requestUUID = "CCCCCC-CCCC-CCCC-CCC-CCCCCCCCC";
      window.patreon.fbPixelId = "XXXXXXXXX";

      window.patreon.theme = 'america';

      window.patreon.bootstrap = window.patreon.bootstrap || {};
      window.patreon.campaignFeatures = window.patreon.campaignFeatures || {};
      window.patreon.experiments = window.patreon.experiments || {};
      window.patreon.featureFlags = window.patreon.featureFlags || {};
      window.patreon.presets = window.patreon.presets || {};

And this script:

 <script type="text/javascript">
    (function(e,t){var n=e.amplitude||{_q:[]};var r=t.createElement("script");r.type="text/javascript";
  r.async=true;r.src="https://d24n15hnbwhuhn.cloudfront.net/libs/amplitude-2.10.0-min.gz.js";
  r.onload=function(){e.amplitude.runQueuedFunctions()};var i=t.getElementsByTagName("script")[0];
  i.parentNode.insertBefore(r,i);var s=function(){this._q=[];return this};function o(e){
  s.prototype[e]=function(){this._q.push([e].concat(Array.prototype.slice.call(arguments,0)));
  return this} }var a=["add","append","clearAll","prepend","set","setOnce","unset"];for(var c=0;c<a.length;c++){
  o(a[c])}n.Identify=s;var u=["init","logEvent","logRevenue","setUserId","setUserProperties","setOptOut","setVersionName","setDomain","setDeviceId","setGlobalUserProperties","identify","clearUserProperties"];
  function p(e){function t(t){e[t]=function(){e._q.push([t].concat(Array.prototype.slice.call(arguments,0)));
  } }for(var n=0;n<u.length;n++){t(u[n])} }p(n);e.amplitude=n})(window,document);

    var amk="XXXXXXXXXXXXXXXXXXXXXXXXX";
    var options = {
      includeUtm: true,
      includeReferrer: true,
      saveParamsReferrerOncePerSession: false,
    };
        var cid = '' + XXXXXXXX
        amplitude.init(amk, cid, options);

    /**
     * Set user properties here.
     * Nothing personally identifying though!!
     * (no: name, email, location etc... we're better than that)
     */
    var amplitudeIdentify = new amplitude.Identify()
    amplitudeIdentify.setOnce('initialLandingPage', window.location.toString())
    amplitude.identify(amplitudeIdentify)
  </script>

I'm not really sure how to use that information, but there it is.

[sabberworm]

FWIW, I recently reached out to Patreon support asking for private article feeds. This was their response:

Hi there,

Thank you so much for writing in with this idea. I can see how a feature like this would be helpful.

I shared your suggestion with our engineers, so we could keep this in mind moving forward. While I can't guarantee that this will result in any changes, we make sure we review each piece of feedback we receive.

If you have any other questions, I'll be here to help!
All the best,

William

I think if enough people write in with the same request, it may get more traction. IMHO we should always bug platforms to implement feeds first and only create bridges as a last resort.