Merge pull request #13752 from annando/capabilities

Store Pixelfed's capabilities

src/Model/Tag.php

@@ -60,6 +60,10 @@ class Tag
 	const AUDIENCE   = 14;
 	const ATTRIBUTED = 15;
 
+	const CAN_ANNOUNCE = 20;
+	const CAN_LIKE     = 21;
+	const CAN_REPLY    = 22;
+
 	const ACCOUNT             = 1;
 	const GENERAL_COLLECTION  = 2;
 	const FOLLOWER_COLLECTION = 3;

src/Protocol/ActivityPub/Processor.php

@@ -918,6 +918,16 @@ class Processor
 
 		self::storeReceivers($item['uri-id'], $activity['receiver_urls'] ?? []);
 
+		if (!empty($activity['capabilities'])) {
+			$restrictions = self::storeCapabilities($item['uri-id'], $activity['capabilities']);
+		} elseif (!is_null($activity['can-comment']) && !$activity['can-comment']) {
+			$restrictions = [Tag::CAN_REPLY];
+		} else {
+			$restrictions = [];
+		}
+
+		// @todo Store restrictions
+
 		$item['location'] = $activity['location'];
 
 		if (!empty($activity['latitude']) && !empty($activity['longitude'])) {
@@ -1322,8 +1332,7 @@ class Processor
 	public static function storeReceivers(int $uriid, array $receivers)
 	{
 		foreach (['as:to' => Tag::TO, 'as:cc' => Tag::CC, 'as:bto' => Tag::BTO, 'as:bcc' => Tag::BCC, 'as:audience' => Tag::AUDIENCE, 'as:attributedTo' => Tag::ATTRIBUTED] as $element => $type) {
-			if (!empty($receivers[$element])) {
-				foreach ($receivers[$element] as $receiver) {
+			foreach ($receivers[$element] ?? [] as $receiver) {
 				if ($receiver == ActivityPub::PUBLIC_COLLECTION) {
 					$name = Receiver::PUBLIC_COLLECTION;
 				} elseif ($path = parse_url($receiver, PHP_URL_PATH)) {
@@ -1341,6 +1350,33 @@ class Processor
 			}
 		}
 	}
+
+	private static function storeCapabilities(int $uriid, array $capabilities): array
+	{
+		$restrictions = [];
+		foreach (['pixelfed:canAnnounce' => Tag::CAN_ANNOUNCE, 'pixelfed:canLike' => Tag::CAN_LIKE, 'pixelfed:canReply' => Tag::CAN_REPLY] as $element => $type) {
+			$restricted = true;
+			foreach ($capabilities[$element] ?? [] as $capability) {
+				if ($capability == ActivityPub::PUBLIC_COLLECTION) {
+					$name = Receiver::PUBLIC_COLLECTION;
+				} elseif (empty($capability) || ($capability == '[]')) {
+					continue;
+				} elseif ($path = parse_url($capability, PHP_URL_PATH)) {
+					$name = trim($path, '/');
+				} elseif ($host = parse_url($capability, PHP_URL_HOST)) {
+					$name = $host;
+				} else {
+					Logger::warning('Unable to coerce name from capability', ['element' => $element, 'type' => $type, 'capability' => $capability]);
+ 					$name = '';
+				}
+				$restricted = false;
+				Tag::store($uriid, $type, $name, $capability);
+			}
+			if ($restricted) {
+				$restrictions[] = $type;
+			}
+		}
+		return $restrictions;
 	}
 
 	/**

src/Protocol/ActivityPub/Receiver.php

@@ -1943,6 +1943,10 @@ class Receiver
 		$object_data['receiver']       = $receivers;
 		$object_data['reception_type'] = $reception_types;
 
+		if (!empty($object['pixelfed:capabilities'])) {
+			$object_data['capabilities'] = self::getCapabilities($object);
+		}
+
 		$object_data['unlisted'] = in_array(-1, $object_data['receiver']);
 		unset($object_data['receiver'][-1]);
 		unset($object_data['reception_type'][-1]);
@@ -1950,6 +1954,18 @@ class Receiver
 		return $object_data;
 	}
 
+	private static function getCapabilities($object) {
+		$capabilities = [];
+		foreach (['pixelfed:canAnnounce', 'pixelfed:canLike', 'pixelfed:canReply'] as $element) {
+			$capabilities_list = JsonLD::fetchElementArray($object['pixelfed:capabilities'], $element, '@id');
+			if (empty($capabilities_list)) {
+				continue;
+			}
+			$capabilities[$element] = $capabilities_list;
+		}
+		return $capabilities;
+	}
+
 	/**
 	 * Create an object data array from a given activity
 	 *
@@ -2058,6 +2074,11 @@ class Receiver
 			$object_data['attachments'] = array_merge($object_data['attachments'], self::processAttachmentUrls($object['as:url'] ?? []));
 		}
 
+		$object_data['can-comment'] = JsonLD::fetchElement($object, 'pt:commentsEnabled', '@value');
+		if (is_null($object_data['can-comment'])) {
+			$object_data['can-comment'] = JsonLD::fetchElement($object, 'pixelfed:commentsEnabled', '@value');
+		}
+
 		// Support for quoted posts (Pleroma, Fedibird and Misskey)
 		$object_data['quote-url'] = JsonLD::fetchElement($object, 'as:quoteUrl', '@value');
 		if (empty($object_data['quote-url'])) {

src/Util/JsonLD.php

@@ -171,6 +171,7 @@ class JsonLD
 			'mobilizon' => (object)['@id' => 'https://joinmobilizon.org/ns#', '@type' => '@id'],
 			'fedibird' => (object)['@id' => 'http://fedibird.com/ns#', '@type' => '@id'],
 			'misskey' => (object)['@id' => 'https://misskey-hub.net/ns#', '@type' => '@id'],
+			'pixelfed' => (object)['@id' => 'http://pixelfed.org/ns#', '@type' => '@id'],
 		];
 
 		$orig_json = $json;