We now offer an endpoint for featured posts

src/Model/Contact.php

@@ -1474,7 +1474,8 @@ class Contact
 			if ($pager->getStart() == 0) {
 				$cdata = Contact::getPublicAndUserContactID($cid, local_user());
 				if (!empty($cdata['public'])) {
-					$condition = ["`uri-id` IN (SELECT `uri-id` FROM `collection-view` WHERE `cid` = ?)", $cdata['public']];
+					$condition = ["`uri-id` IN (SELECT `uri-id` FROM `collection-view` WHERE `cid` = ? AND `type` = ?)",
+						$cdata['public'], Post\Collection::FEATURED];
 					$pinned = Post::toArray(Post::selectForUser(local_user(), $fields, $condition, $params));
 					$items = array_merge($pinned, $items);
 				}

src/Module/ActivityPub/Featured.php

@@ -0,0 +1,51 @@
+<?php
+/**
+ * @copyright Copyright (C) 2010-2022, the Friendica project
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Friendica\Module\ActivityPub;
+
+use Friendica\BaseModule;
+use Friendica\Model\User;
+use Friendica\Protocol\ActivityPub;
+
+/**
+ * ActivityPub featured posts
+ */
+class Featured extends BaseModule
+{
+	protected function rawContent(array $request = [])
+	{
+		if (empty($this->parameters['nickname'])) {
+			throw new \Friendica\Network\HTTPException\NotFoundException();
+		}
+
+		$owner = User::getOwnerDataByNick($this->parameters['nickname']);
+		if (empty($owner)) {
+			throw new \Friendica\Network\HTTPException\NotFoundException();
+		}
+
+		$page = $_REQUEST['page'] ?? null;
+
+		$outbox = ActivityPub\Transmitter::getFeatured($owner, $page);
+		header('Content-Type: application/activity+json');
+		echo json_encode($outbox);
+		exit();
+	}
+}

src/Protocol/ActivityPub.php

@@ -65,6 +65,10 @@ class ActivityPub
 		'diaspora' => 'https://diasporafoundation.org/ns/',
 		'litepub' => 'http://litepub.social/ns#',
 		'toot' => 'http://joinmastodon.org/ns#',
+		'featured' => [
+			"@id" => "toot:featured",
+			"@type" => "@id",
+		],
 		'schema' => 'http://schema.org#',
 		'manuallyApprovesFollowers' => 'as:manuallyApprovesFollowers',
 		'sensitive' => 'as:sensitive', 'Hashtag' => 'as:Hashtag',

src/Protocol/ActivityPub/Transmitter.php

@@ -288,6 +288,69 @@ class Transmitter
 		return $data;
 	}
 
+	/**
+	 * Public posts for the given owner
+	 *
+	 * @param array   $owner Owner array
+	 * @param integer $page  Page number
+	 *
+	 * @return array of posts
+	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+	 * @throws \ImagickException
+	 */
+	public static function getFeatured($owner, $page = null)
+	{
+		$condition = ["`uri-id` IN (SELECT `uri-id` FROM `collection-view` WHERE `cid` = ? AND `type` = ?)",
+			Contact::getIdForURL($owner['url'], 0, false), Post\Collection::FEATURED];
+
+		$condition = DBA::mergeConditions($condition,
+			['uid'           => $owner['uid'],
+			'author-id'      => Contact::getIdForURL($owner['url'], 0, false),
+			'private'        => [Item::PUBLIC, Item::UNLISTED],
+			'gravity'        => [GRAVITY_PARENT, GRAVITY_COMMENT],
+			'network'        => Protocol::FEDERATED,
+			'parent-network' => Protocol::FEDERATED,
+			'origin'         => true,
+			'deleted'        => false,
+			'visible'        => true]);
+
+		$count = Post::count($condition);
+
+		$data = ['@context' => ActivityPub::CONTEXT];
+		$data['id'] = DI::baseUrl() . '/featured/' . $owner['nickname'];
+		$data['type'] = 'OrderedCollection';
+		$data['totalItems'] = $count;
+
+		if (empty($page)) {
+			$data['first'] = DI::baseUrl() . '/featured/' . $owner['nickname'] . '?page=1';
+		} else {
+			$data['type'] = 'OrderedCollectionPage';
+			$list = [];
+
+			$items = Post::select(['id'], $condition, ['limit' => [($page - 1) * 20, 20], 'order' => ['created' => true]]);
+			while ($item = Post::fetch($items)) {
+				$activity = self::createActivityFromItem($item['id'], true);
+				$activity['type'] = $activity['type'] == 'Update' ? 'Create' : $activity['type'];
+
+				// Only list "Create" activity objects here, no reshares
+				if (!empty($activity['object']) && ($activity['type'] == 'Create')) {
+					$list[] = $activity['object'];
+				}
+			}
+			DBA::close($items);
+
+			if (!empty($list)) {
+				$data['next'] = DI::baseUrl() . '/featured/' . $owner['nickname'] . '?page=' . ($page + 1);
+			}
+
+			$data['partOf'] = DI::baseUrl() . '/featured/' . $owner['nickname'];
+
+			$data['orderedItems'] = $list;
+		}
+
+		return $data;
+	}
+
 	/**
 	 * Return the service array containing information the used software and it's url
 	 *
@@ -330,6 +393,7 @@ class Transmitter
 			$data['followers'] = DI::baseUrl() . '/followers/' . $owner['nick'];
 			$data['inbox']     = DI::baseUrl() . '/inbox/' . $owner['nick'];
 			$data['outbox']    = DI::baseUrl() . '/outbox/' . $owner['nick'];
+			$data['featured']  = DI::baseUrl() . '/featured/' . $owner['nick'];
 		} else {
 			$data['inbox'] = DI::baseUrl() . '/friendica/inbox';
 		}

static/routes.config.php

@@ -363,6 +363,8 @@ return [
 
 	'/events/json'              => [Module\Events\Json::class,      [R::GET]],
 
+	'/featured/{nickname}'      => [Module\ActivityPub\Featured::class, [R::GET]],
+
 	'/feed'     => [
 		'/{nickname}'          => [Module\Feed::class, [R::GET]],
 		'/{nickname}/posts'    => [Module\Feed::class, [R::GET]],