Register follow handler

src/ActivityPub.php

@@ -7,6 +7,7 @@ namespace ActivityPub;
 use ActivityPub\Activities\AcceptHandler;
 use ActivityPub\Activities\CreateHandler;
 use ActivityPub\Activities\DeleteHandler;
+use ActivityPub\Activities\FollowHandler;
 use ActivityPub\Activities\NonActivityHandler;
 use ActivityPub\Activities\UpdateHandler;
 use ActivityPub\Activities\ValidationHandler;
@@ -87,6 +88,7 @@ class ActivityPub
         $dispatcher->addSubscriber( $this->module->get( CreateHandler::class ) );
         $dispatcher->addSubscriber( $this->module->get( UpdateHandler::class ) );
         $dispatcher->addSubscriber( $this->module->get( DeleteHandler::class ) );
+        $dispatcher->addSubscriber( $this->module->get( FollowHandler::class ) );
         $dispatcher->addSubscriber( $this->module->get( AcceptHandler::class ) );
     }
 

src/Config/ActivityPubConfig.php

@@ -37,6 +37,11 @@ class ActivityPubConfig
      */
     private $idPathPrefix;
 
+    /**
+     * @var bool
+     */
+    private $autoAcceptsFollows;
+
     /**
      * Don't call this directly - instead, use
      * ActivityPubConfig->createBuilder()->build()
@@ -51,6 +56,7 @@ class ActivityPubConfig
         $this->authFunction = $builder->getAuthFunction();
         $this->jsonLdContext = $builder->getJsonLdContext();
         $this->idPathPrefix = $builder->getIdPathPrefix();
+        $this->autoAcceptsFollows = $builder->getAutoAcceptsFollows();
     }
 
     public static function createBuilder()
@@ -106,5 +112,13 @@ class ActivityPubConfig
     {
         return $this->idPathPrefix;
     }
+
+    /**
+     * @return bool
+     */
+    public function getAutoAcceptsFollows()
+    {
+        return $this->autoAcceptsFollows;
+    }
 }
 

src/Config/ActivityPubConfigBuilder.php

@@ -53,6 +53,11 @@ class ActivityPubConfigBuilder
      */
     private $idPathPrefix;
 
+    /**
+     * @var bool
+     */
+    private $autoAcceptsFollows;
+
     /**
      * Creates a new ActivityPubConfig instance with default values
      *
@@ -67,6 +72,7 @@ class ActivityPubConfigBuilder
         };
         $this->jsonLdContext = ContextProvider::getDefaultContext();
         $this->idPathPrefix = IdProvider::DEFAULT_ID_PATH_PREFIX;
+        $this->autoAcceptsFollows = false;
     }
 
     /**
@@ -235,5 +241,37 @@ class ActivityPubConfigBuilder
         $this->idPathPrefix = $idPathPrefix;
         return $this;
     }
+
+    /**
+     * @return bool
+     */
+    public function getAutoAcceptsFollows()
+    {
+        return $this->autoAcceptsFollows;
+    }
+
+    /**
+     * If `autoAcceptsFollows` is `true`, the library will automatically accept
+     * incoming Follow activities instead of waiting to receive an Accept activity
+     * from the local actor.
+     *
+     * Default: false
+     *
+     * Usage for this setter:
+     *
+     *     $config->setAutoAcceptsFollows()  // $autoAcceptsFollows will be true
+     *
+     * or
+     *
+     *     $config->setAutoAcceptsFollows( $trueOrFalse )  // $autoAcceptsFollows will be the value of $trueOrFalse
+     *
+     * @param bool $autoAcceptsFollows [default: true]
+     * @return ActivityPubConfigBuilder The builder instance
+     */
+    public function setAutoAcceptsFollows( $autoAcceptsFollows = true )
+    {
+        $this->autoAcceptsFollows = $autoAcceptsFollows;
+        return $this;
+    }
 }
 

src/Config/ActivityPubModule.php

@@ -7,6 +7,7 @@ namespace ActivityPub\Config;
 use ActivityPub\Activities\AcceptHandler;
 use ActivityPub\Activities\CreateHandler;
 use ActivityPub\Activities\DeleteHandler;
+use ActivityPub\Activities\FollowHandler;
 use ActivityPub\Activities\NonActivityHandler;
 use ActivityPub\Activities\UpdateHandler;
 use ActivityPub\Activities\ValidationHandler;
@@ -135,6 +136,10 @@ class ActivityPubModule
             ->addArgument( new Reference( SimpleDateTimeProvider::class ) )
             ->addArgument( new Reference( ObjectsService::class ) );
 
+        $this->injector->register( FollowHandler::class, FollowHandler::class )
+            ->addArgument( $config->getAutoAcceptsFollows() )
+            ->addArgument( new Reference( ContextProvider::class ) );
+
         $this->injector->register( AcceptHandler::class, AcceptHandler::class )
             ->addArgument( new Reference( ObjectsService::class ) )
             ->addArgument( new Reference( CollectionsService::class ) )