Add/event objects

includes/activity/class-activity.php

@@ -19,74 +19,13 @@
 class Activity extends Base_Object {
 	const CONTEXT = array(
 		'https://www.w3.org/ns/activitystreams',
-		'https://w3id.org/security/v1',
-		array(
-			'manuallyApprovesFollowers' => 'as:manuallyApprovesFollowers',
-			'PropertyValue' => 'schema:PropertyValue',
-			'schema' => 'http://schema.org#',
-			'pt' => 'https://joinpeertube.org/ns#',
-			'toot' => 'http://joinmastodon.org/ns#',
-			'webfinger' => 'https://webfinger.net/#',
-			'litepub' => 'http://litepub.social/ns#',
-			'lemmy' => 'https://join-lemmy.org/ns#',
-			'value' => 'schema:value',
-			'Hashtag' => 'as:Hashtag',
-			'featured' => array(
-				'@id' => 'toot:featured',
-				'@type' => '@id',
-			),
-			'featuredTags' => array(
-				'@id' => 'toot:featuredTags',
-				'@type' => '@id',
-			),
-			'alsoKnownAs' => array(
-				'@id' => 'as:alsoKnownAs',
-				'@type' => '@id',
-			),
-			'moderators' => array(
-				'@id' => 'lemmy:moderators',
-				'@type' => '@id',
-			),
-			'postingRestrictedToMods' => 'lemmy:postingRestrictedToMods',
-			'discoverable' => 'toot:discoverable',
-			'indexable' => 'toot:indexable',
-			'sensitive' => 'as:sensitive',
-			'resource' => 'webfinger:resource',
-		),
 	);
 
-	/**
-	 * The object's unique global identifier
-	 *
-	 * @see https://www.w3.org/TR/activitypub/#obj-id
-	 *
-	 * @var string
-	 */
-	protected $id;
-
 	/**
 	 * @var string
 	 */
 	protected $type = 'Activity';
 
-	/**
-	 * The context within which the object exists or an activity was
-	 * performed.
-	 * The notion of "context" used is intentionally vague.
-	 * The intended function is to serve as a means of grouping objects
-	 * and activities that share a common originating context or
-	 * purpose. An example could be all activities relating to a common
-	 * project or event.
-	 *
-	 * @see https://www.w3.org/TR/activitystreams-vocabulary/#dfn-context
-	 *
-	 * @var string
-	 *    | ObjectType
-	 *    | Link
-	 *    | null
-	 */
-	protected $context = self::CONTEXT;
-
 	/**
 	 * Describes the direct object of the activity.
 	 * For instance, in the activity "John added a movie to his

includes/activity/class-actor.php

@@ -16,6 +16,38 @@
  * @see https://www.w3.org/TR/activitystreams-vocabulary/#actor-types
  */
 class Actor extends Base_Object {
+	// Reduced context for actors. TODO: still unused.
+	const CONTEXT = array(
+		'https://www.w3.org/ns/activitystreams',
+		'https://w3id.org/security/v1',
+		array(
+			'schema' => 'http://schema.org#',
+			'toot' => 'http://joinmastodon.org/ns#',
+			'webfinger' => 'https://webfinger.net/#',
+			'lemmy' => 'https://join-lemmy.org/ns#',
+			'manuallyApprovesFollowers' => 'as:manuallyApprovesFollowers',
+			'PropertyValue' => 'schema:PropertyValue',
+			'value' => 'schema:value',
+			'Hashtag' => 'as:Hashtag',
+			'featured' => array(
+				'@id' => 'toot:featured',
+				'@type' => '@id',
+			),
+			'featuredTags' => array(
+				'@id' => 'toot:featuredTags',
+				'@type' => '@id',
+			),
+			'moderators' => array(
+				'@id' => 'lemmy:moderators',
+				'@type' => '@id',
+			),
+			'postingRestrictedToMods' => 'lemmy:postingRestrictedToMods',
+			'discoverable' => 'toot:discoverable',
+			'indexable' => 'toot:indexable',
+			'resource' => 'webfinger:resource',
+		),
+	);
+
 	/**
 	 * @var string
 	 */
@@ -133,6 +165,8 @@ class Actor extends Base_Object {
 	 *
 	 * @see https://docs.joinmastodon.org/spec/activitypub/#as
 	 *
+	 * @context as:manuallyApprovesFollowers
+	 *
 	 * @var boolean
 	 */
 	protected $manually_approves_followers = false;

includes/activity/class-base-object.php

@@ -9,6 +9,7 @@
 
 use WP_Error;
 use ReflectionClass;
+use DateTime;
 
 use function Activitypub\camel_to_snake_case;
 use function Activitypub\snake_to_camel_case;
@@ -26,6 +27,13 @@
  * @see https://www.w3.org/TR/activitystreams-core/#object
  */
 class Base_Object {
+	const CONTEXT = array(
+		'https://www.w3.org/ns/activitystreams',
+		array(
+			'Hashtag' => 'as:Hashtag',
+		),
+	);
+
 	/**
 	 * The object's unique global identifier
 	 *
@@ -121,6 +129,13 @@ class Base_Object {
 	 */
 	protected $context;
 
+	/**
+	 * The JSON-LD context.
+	 *
+	 * @var string|array
+	 */
+	protected $_context;
+
 	/**
 	 * The content MAY be expressed using multiple language-tagged
 	 * values.
@@ -457,14 +472,22 @@ public function __call( $method, $params ) {
 		}
 
 		if ( \strncasecmp( $method, 'set', 3 ) === 0 ) {
-			$this->set( $var, $params[0] );
+			return $this->set( $var, $params[0] );
 		}
 
 		if ( \strncasecmp( $method, 'add', 3 ) === 0 ) {
 			$this->add( $var, $params[0] );
 		}
 	}
 
+	/**
+	 * The ActivityPub object typicallly can define it's own JSON-LD context.
+	 * @todo
+	 */
+	public function __construct() {
+		$this->_context = $this::CONTEXT;
+	}
+
 	/**
 	 * Magic function, to transform the object to string.
 	 *
@@ -524,7 +547,7 @@ public function set( $key, $value ) {
 
 		$this->$key = $value;
 
-		return $this->$key;
+		return $this;
 	}
 
 	/**
@@ -628,6 +651,8 @@ public function to_array() {
 		$array = array();
 		$vars  = get_object_vars( $this );
 
+		$array['@context'] = array();
+
 		foreach ( $vars as $key => $value ) {
 			// ignotre all _prefixed keys.
 			if ( '_' === substr( $key, 0, 1 ) ) {
@@ -649,10 +674,10 @@ public function to_array() {
 			}
 		}
 
-		// replace 'context' key with '@context' and move it to the top.
-		if ( array_key_exists( 'context', $array ) ) {
-			$context = $array['context'];
-			unset( $array['context'] );
+		// replace '_context' key with '@context' and move it to the top.
+		if ( isset( $this->_context ) ) {
+			$context = array_unique( array_merge( $this->_context, $array['@context'] ), SORT_REGULAR );
+			unset( $array['@context'] );
 			$array = array_merge( array( '@context' => $context ), $array );
 		}
 
@@ -692,4 +717,13 @@ public function to_json() {
 	public function get_object_var_keys() {
 		return \array_keys( \get_object_vars( $this ) );
 	}
+
+	/**
+	 * Returns the context of this object.
+	 *
+	 * @return array $context A shortened and clean JSON-LD context for the ActivityPub object.
+	 */
+	public static function get__context() {
+		return static::CONTEXT;
+	}
 }