[AP] Subscribe RemoteFollow plugin events for allowing following with the remote-follow button

plugins/ActivityPub/ActivityPubPlugin.php

@@ -50,7 +50,7 @@ const ACTIVITYPUB_PUBLIC_TO = ['https://www.w3.org/ns/activitystreams#Public',
  */
 class ActivityPubPlugin extends Plugin
 {
-    const PLUGIN_VERSION = '0.1.0alpha0';
+    const PLUGIN_VERSION = '0.2.0alpha0';
 
     /**
      * Returns a Actor's URI from its local $profile
@@ -657,6 +657,28 @@ class ActivityPubPlugin extends Plugin
         }
     }
 
+    /**
+     * Try to grab and store the remote profile by the given uri
+     * 
+     * @param string $uri
+     * @param Profile &$profile
+     * @return bool
+     */
+    public function onRemoteFollowPullProfile(string $uri, ?Profile &$profile): bool
+    {
+        try {
+            $aprofile = $this->pull_remote_profile($uri);
+            if ($aprofile instanceof Activitypub_profile) {
+                $profile = $aprofile->local_profile();
+            }
+        } catch (Exception $e) {
+            // No remote ActivityPub profile found
+            return true;
+        }
+
+        return is_null($profile);
+    }
+
     /********************************************************
      *                    Delivery Events                   *
      ********************************************************/

plugins/ActivityPub/README.md

@@ -8,6 +8,11 @@ It includes general information about the plugin.
 
 This plugin adds [ActivityPub](https://www.w3.org/TR/activitypub/) support to GNU social.
 
+## Additional functionality
+
+The RemoteFollow plugin is recommended as it increases the UX significatively,
+it adds a remote follow button to user profiles.
+
 ## Credits
 
 * **[Diogo Cordeiro](https://www.diogo.site/)**