Merge pull request #8617 from MrPetovan/task/8220-twitter-followers-list

(Re)Implement Twitter contact API endpoints

doc/API-Twitter.md

@@ -152,19 +152,29 @@ These endpoints use the [Friendica API entities](help/API-Entities).
 - [GET api/friendships/incoming](https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-friendships-incoming)
     - Unsupported parameters
         - `stringify_ids`
-- [GET api/followers/ids](https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-followers-ids)
-    - Unsupported parameters:
-        - `user_id`: Relationships aren't returned for other users than self
-        - `screen_name`: Relationships aren't returned for other users than self
-- [GET api/friends/ids](https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-friends-ids)
-    - Unsupported parameters:
-        - `user_id`: Relationships aren't returned for other users than self
-        - `screen_name`: Relationships aren't returned for other users than self
+
+- - [GET api/followers/ids](https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-followers-ids)
+  - [GET api/followers/list](https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-followers-list)
+  - [GET api/friends/ids](https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-friends-ids)
+  - [GET api/friends/list](https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-friends-list)
+    - Additional parameters:
+        - `since_id`: You can use the `next_cursor` value to load the next page.
+        - `max_id`: You can use the inverse of the `previous_cursor` value to load the previous page.
+    - Unsupported parameter:
+        - `skip_status`: No status is returned even if it isn't set to true.
+    - Caveats:
+        - `cursor` trumps `since_id` trumps `max_id` if any combination is provided. 
+        - `user_id` must be the ID of a contact associated with a local user account.
+        - `screen_name` must be associated with a local user account.
+        - `screen_name` trumps `user_id` if both are provided (undocumented Twitter behavior).
+        - Will succeed but return an empty array for users hiding their contact lists.
 
 
 - [POST api/friendships/destroy](https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/post-friendships-destroy)
 
 
+
+
 ## Non-implemented endpoints
 
 - [GET oauth/authenticate](https://developer.twitter.com/en/docs/basics/authentication/api-reference/authenticate)
@@ -188,8 +198,6 @@ These endpoints use the [Friendica API entities](help/API-Entities).
 - [POST lists/subscribers/destroy](https://developer.twitter.com/en/docs/accounts-and-users/create-manage-lists/api-reference/post-lists-subscribers-destroy)
 
 
-- [GET followers/list](https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-followers-list)
-- [GET friends/list](https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-friends-list)
 - [GET friendships/lookup](https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-friendships-lookup)
 - [GET friendships/no_retweets/ids](https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-friendships-no_retweets-ids)
 - [GET friendships/outgoing](https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-friendships-outgoing)

include/api.php

@@ -3580,96 +3580,6 @@ function api_statusnet_version($type)
 api_register_func('api/gnusocial/version', 'api_statusnet_version', false);
 api_register_func('api/statusnet/version', 'api_statusnet_version', false);
 
-/**
- *
- * @param string $type Return type (atom, rss, xml, json)
- *
- * @param int $rel A contact relationship constant
- * @return array|string|void
- * @throws BadRequestException
- * @throws ForbiddenException
- * @throws ImagickException
- * @throws InternalServerErrorException
- * @throws UnauthorizedException
- * @todo use api_format_data() to return data
- */
-function api_ff_ids($type, int $rel)
-{
-	if (!api_user()) {
-		throw new ForbiddenException();
-	}
-
-	$a = DI::app();
-
-	api_get_user($a);
-
-	$stringify_ids = $_REQUEST['stringify_ids'] ?? false;
-
-	$contacts = DBA::p("SELECT `pcontact`.`id`
-		FROM `contact`
-		INNER JOIN `contact` AS `pcontact`
-		    ON `contact`.`nurl` = `pcontact`.`nurl`
-		    AND `pcontact`.`uid` = 0
-		WHERE `contact`.`uid` = ?
-		AND NOT `contact`.`self`
-		AND `contact`.`rel` IN (?, ?)",
-		api_user(),
-		$rel,
-		Contact::FRIEND
-	);
-
-	$ids = [];
-	foreach (DBA::toArray($contacts) as $contact) {
-		if ($stringify_ids) {
-			$ids[] = $contact['id'];
-		} else {
-			$ids[] = intval($contact['id']);
-		}
-	}
-
-	return api_format_data('ids', $type, ['id' => $ids]);
-}
-
-/**
- * Returns the ID of every user the user is following.
- *
- * @param string $type Return type (atom, rss, xml, json)
- *
- * @return array|string
- * @throws BadRequestException
- * @throws ForbiddenException
- * @throws ImagickException
- * @throws InternalServerErrorException
- * @throws UnauthorizedException
- * @see https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-friends-ids
- */
-function api_friends_ids($type)
-{
-	return api_ff_ids($type, Contact::SHARING);
-}
-
-/**
- * Returns the ID of every user following the user.
- *
- * @param string $type Return type (atom, rss, xml, json)
- *
- * @return array|string
- * @throws BadRequestException
- * @throws ForbiddenException
- * @throws ImagickException
- * @throws InternalServerErrorException
- * @throws UnauthorizedException
- * @see https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-followers-ids
- */
-function api_followers_ids($type)
-{
-	return api_ff_ids($type, Contact::FOLLOWER);
-}
-
-/// @TODO move to top of file or somewhere better
-api_register_func('api/friends/ids', 'api_friends_ids', true);
-api_register_func('api/followers/ids', 'api_followers_ids', true);
-
 /**
  * Sends a new direct message.
  *

src/DI.php

@@ -279,6 +279,14 @@ abstract class DI
 		return self::$dice->create(Factory\Api\Mastodon\Relationship::class);
 	}
 
+	/**
+	 * @return Factory\Api\Twitter\User
+	 */
+	public static function twitterUser()
+	{
+		return self::$dice->create(Factory\Api\Twitter\User::class);
+	}
+
 	/**
 	 * @return Factory\Notification\Notification
 	 */

src/Factory/Api/Twitter/User.php

@@ -0,0 +1,55 @@
+<?php
+/**
+ * @copyright Copyright (C) 2020, Friendica
+ *
+ * @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\Factory\Api\Twitter;
+
+use Friendica\BaseFactory;
+use Friendica\Model\APContact;
+use Friendica\Model\Contact;
+use Friendica\Network\HTTPException;
+
+class User extends BaseFactory
+{
+	/**
+	 * @param int  $contactId
+	 * @param int  $uid Public contact (=0) or owner user id
+	 * @param bool $skip_status
+	 * @param bool $include_user_entities
+	 * @return \Friendica\Object\Api\Twitter\User
+	 * @throws HTTPException\InternalServerErrorException
+	 * @throws \ImagickException
+	 */
+	public function createFromContactId(int $contactId, $uid = 0, $skip_status = false, $include_user_entities = true)
+	{
+		$cdata = Contact::getPublicAndUserContacID($contactId, $uid);
+		if (!empty($cdata)) {
+			$publicContact = Contact::getById($cdata['public']);
+			$userContact = Contact::getById($cdata['user']);
+		} else {
+			$publicContact = Contact::getById($contactId);
+			$userContact = [];
+		}
+
+		$apcontact = APContact::getByURL($publicContact['url'], false);
+
+		return new \Friendica\Object\Api\Twitter\User($publicContact, $apcontact, $userContact, $skip_status, $include_user_entities);
+	}
+}

src/Module/Api/Twitter/ContactEndpoint.php

@@ -0,0 +1,223 @@
+<?php
+/**
+ * @copyright Copyright (C) 2020, Friendica
+ *
+ * @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\Api\Twitter;
+
+use Friendica\Database\DBA;
+use Friendica\DI;
+use Friendica\Model\Profile;
+use Friendica\Model\User;
+use Friendica\Module\BaseApi;
+use Friendica\Model\Contact;
+use Friendica\Network\HTTPException;
+use Friendica\Util\Strings;
+
+abstract class ContactEndpoint extends BaseApi
+{
+	const DEFAULT_COUNT = 20;
+	const MAX_COUNT = 200;
+
+	public static function init(array $parameters = [])
+	{
+		parent::init($parameters);
+
+		if (!self::login()) {
+			throw new HTTPException\UnauthorizedException();
+		}
+	}
+
+	/**
+	 * Computes the uid from the contact_id + screen_name parameters
+	 *
+	 * @param int|null $contact_id
+	 * @param string   $screen_name
+	 * @return int
+	 * @throws HTTPException\NotFoundException
+	 */
+	protected static function getUid(int $contact_id = null, string $screen_name = null)
+	{
+		$uid = self::$current_user_id;
+
+		if ($contact_id || $screen_name) {
+			// screen_name trumps user_id when both are provided
+			if (!$screen_name) {
+				$contact = Contact::getById($contact_id, ['nick', 'url']);
+				// We don't have the followers of remote accounts so we check for locality
+				if (empty($contact) || !Strings::startsWith($contact['url'], DI::baseUrl()->get())) {
+					throw new HTTPException\NotFoundException(DI::l10n()->t('Contact not found'));
+				}
+
+				$screen_name = $contact['nick'];
+			}
+
+			$user = User::getByNickname($screen_name, ['uid']);
+			if (empty($user)) {
+				throw new HTTPException\NotFoundException(DI::l10n()->t('User not found'));
+			}
+
+			$uid = $user['uid'];
+		}
+
+		return $uid;
+	}
+
+	/**
+	 * This methods expands the contact ids into full user objects in an existing result set.
+	 *
+	 * @param mixed $rel A relationship constant or a list of them
+	 * @param int   $uid The local user id we query the contacts from
+	 * @param int   $cursor
+	 * @param int   $count
+	 * @param bool  $skip_status
+	 * @param bool  $include_user_entities
+	 * @return array
+	 * @throws HTTPException\InternalServerErrorException
+	 * @throws HTTPException\NotFoundException
+	 * @throws \ImagickException
+	 */
+	protected static function list($rel, int $uid, int $cursor = -1, int $count = self::DEFAULT_COUNT, bool $skip_status = false, bool $include_user_entities = true)
+	{
+		$return = self::ids($rel, $uid, $cursor, $count);
+
+		$users = [];
+		foreach ($return['ids'] as $contactId) {
+			$users[] = DI::twitterUser()->createFromContactId($contactId, $uid, $skip_status, $include_user_entities);
+		}
+
+		unset($return['ids']);
+		$return['users'] = $users;
+
+		$return = [
+			'users' => $users,
+			'next_cursor' => $return['next_cursor'],
+			'next_cursor_str' => $return['next_cursor_str'],
+			'previous_cursor' => $return['previous_cursor'],
+			'previous_cursor_str' => $return['previous_cursor_str'],
+			'total_count' => $return['total_count'],
+		];
+
+		return $return;
+	}
+
+	/**
+	 * @param mixed $rel A relationship constant or a list of them
+	 * @param int   $uid The local user id we query the contacts from
+	 * @param int   $cursor
+	 * @param int   $count
+	 * @param bool  $stringify_ids
+	 * @return array
+	 * @throws HTTPException\NotFoundException
+	 */
+	protected static function ids($rel, int $uid, int $cursor = -1, int $count = self::DEFAULT_COUNT, bool $stringify_ids = false)
+	{
+		$hide_friends = false;
+		if ($uid != self::$current_user_id) {
+			$profile = Profile::getByUID($uid);
+			if (empty($profile)) {
+				throw new HTTPException\NotFoundException(DI::l10n()->t('Profile not found'));
+			}
+
+			$hide_friends = (bool)$profile['hide-friends'];
+		}
+
+		$ids = [];
+		$next_cursor = 0;
+		$previous_cursor = 0;
+		$total_count = 0;
+		if (!$hide_friends) {
+			$condition = DBA::collapseCondition([
+				'rel' => $rel,
+				'uid' => $uid,
+				'self' => false,
+				'deleted' => false,
+				'hidden' => false,
+				'archive' => false,
+				'pending' => false
+			]);
+
+			$total_count = DBA::count('contact', $condition);
+
+			if ($cursor !== -1) {
+				if ($cursor > 0) {
+					$condition[0] .= " AND `id` > ?";
+					$condition[] = $cursor;
+				} else {
+					$condition[0] .= " AND `id` < ?";
+					$condition[] = -$cursor;
+				}
+			}
+
+			$contacts = Contact::selectToArray(['id'], $condition, ['limit' => $count, 'order' => ['id']]);
+
+			// Contains user-specific contact ids
+			$ids = array_column($contacts, 'id');
+
+			// Cursor is on the user-specific contact id since it's the sort field
+			if (count($ids)) {
+				$previous_cursor = -$ids[0];
+				$next_cursor = $ids[count($ids) -1];
+			}
+
+			// No next page
+			if ($total_count <= count($contacts) || count($contacts) < $count) {
+				$next_cursor = 0;
+			}
+			// End of results
+			if ($cursor < 0 && count($contacts) === 0) {
+				$next_cursor = -1;
+			}
+
+			// No previous page
+			if ($cursor === -1) {
+				$previous_cursor = 0;
+			}
+
+			if ($cursor > 0 && count($contacts) === 0) {
+				$previous_cursor = -$cursor;
+			}
+
+			if ($cursor < 0 && count($contacts) === 0) {
+				$next_cursor = -1;
+			}
+
+			// Conversion to public contact ids
+			array_walk($ids, function (&$contactId) use ($uid, $stringify_ids) {
+				$cdata = Contact::getPublicAndUserContacID($contactId, $uid);
+				if ($stringify_ids) {
+					$contactId = (string)$cdata['public'];
+				} else {
+					$contactId = (int)$cdata['public'];
+				}
+			});
+		}
+
+		$return = [
+			'ids' => $ids,
+			'next_cursor' => $next_cursor,
+			'next_cursor_str' => (string)$next_cursor,
+			'previous_cursor' => $previous_cursor,
+			'previous_cursor_str' => (string)$previous_cursor,
+			'total_count' => $total_count,
+		];
+
+		return $return;
+	}
+}

src/Module/Api/Twitter/FollowersIds.php

@@ -0,0 +1,58 @@
+<?php
+/**
+ * @copyright Copyright (C) 2020, Friendica
+ *
+ * @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\Api\Twitter;
+
+use Friendica\Core\System;
+use Friendica\Model\Contact;
+
+/**
+ * @see https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-followers-ids
+ */
+class FollowersIds extends ContactEndpoint
+{
+	public static function rawContent(array $parameters = [])
+	{
+		// Expected value for user_id parameter: public/user contact id
+		$contact_id    = filter_input(INPUT_GET, 'user_id'      , FILTER_VALIDATE_INT);
+		$screen_name   = filter_input(INPUT_GET, 'screen_name');
+		$cursor        = filter_input(INPUT_GET, 'cursor'       , FILTER_VALIDATE_INT);
+		$stringify_ids = filter_input(INPUT_GET, 'stringify_ids', FILTER_VALIDATE_BOOLEAN);
+		$count         = filter_input(INPUT_GET, 'count'        , FILTER_VALIDATE_INT, ['options' => [
+			'default' => self::DEFAULT_COUNT,
+			'min_range' => 1,
+			'max_range' => self::MAX_COUNT,
+		]]);
+		// Friendica-specific
+		$since_id      = filter_input(INPUT_GET, 'since_id'     , FILTER_VALIDATE_INT);
+		$max_id        = filter_input(INPUT_GET, 'max_id'       , FILTER_VALIDATE_INT, ['options' => [
+			'default' => 1,
+		]]);
+
+		System::jsonExit(self::ids(
+			[Contact::FOLLOWER, Contact::FRIEND],
+			self::getUid($contact_id, $screen_name),
+			$cursor ?? $since_id ?? - $max_id,
+			$count,
+			$stringify_ids
+		));
+	}
+}

src/Module/Api/Twitter/FollowersList.php

@@ -0,0 +1,62 @@
+<?php
+/**
+ * @copyright Copyright (C) 2020, Friendica
+ *
+ * @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\Api\Twitter;
+
+use Friendica\Core\System;
+use Friendica\Model\Contact;
+
+/**
+ * @see https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-followers-list
+ */
+class FollowersList extends ContactEndpoint
+{
+	public static function rawContent(array $parameters = [])
+	{
+		// Expected value for user_id parameter: public/user contact id
+		$contact_id    = filter_input(INPUT_GET, 'user_id'      , FILTER_VALIDATE_INT);
+		$screen_name   = filter_input(INPUT_GET, 'screen_name');
+		$cursor        = filter_input(INPUT_GET, 'cursor'       , FILTER_VALIDATE_INT);
+		$count         = filter_input(INPUT_GET, 'count'        , FILTER_VALIDATE_INT, ['options' => [
+			'default' => self::DEFAULT_COUNT,
+			'min_range' => 1,
+			'max_range' => self::MAX_COUNT,
+		]]);
+		$skip_status           = filter_input(INPUT_GET, 'skip_status'          , FILTER_VALIDATE_BOOLEAN);
+		$include_user_entities = filter_input(INPUT_GET, 'include_user_entities', FILTER_VALIDATE_BOOLEAN);
+
+		// Friendica-specific
+		$since_id      = filter_input(INPUT_GET, 'since_id'     , FILTER_VALIDATE_INT);
+		$max_id        = filter_input(INPUT_GET, 'max_id'       , FILTER_VALIDATE_INT, ['options' => [
+			'default' => 1,
+		]]);
+
+
+		System::jsonExit(self::list(
+			[Contact::FOLLOWER, Contact::FRIEND],
+			self::getUid($contact_id, $screen_name),
+			$cursor ?? $since_id ?? - $max_id,
+			$count,
+			$skip_status,
+			$include_user_entities
+		));
+	}
+}

src/Module/Api/Twitter/FriendsIds.php

@@ -0,0 +1,58 @@
+<?php
+/**
+ * @copyright Copyright (C) 2020, Friendica
+ *
+ * @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\Api\Twitter;
+
+use Friendica\Core\System;
+use Friendica\Model\Contact;
+
+/**
+ * @see https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-friends-ids
+ */
+class FriendsIds extends ContactEndpoint
+{
+	public static function rawContent(array $parameters = [])
+	{
+		// Expected value for user_id parameter: public/user contact id
+		$contact_id    = filter_input(INPUT_GET, 'user_id'      , FILTER_VALIDATE_INT);
+		$screen_name   = filter_input(INPUT_GET, 'screen_name');
+		$cursor        = filter_input(INPUT_GET, 'cursor'       , FILTER_VALIDATE_INT);
+		$stringify_ids = filter_input(INPUT_GET, 'stringify_ids', FILTER_VALIDATE_BOOLEAN);
+		$count         = filter_input(INPUT_GET, 'count'        , FILTER_VALIDATE_INT, ['options' => [
+			'default' => self::DEFAULT_COUNT,
+			'min_range' => 1,
+			'max_range' => self::MAX_COUNT,
+		]]);
+		// Friendica-specific
+		$since_id      = filter_input(INPUT_GET, 'since_id'     , FILTER_VALIDATE_INT);
+		$max_id        = filter_input(INPUT_GET, 'max_id'       , FILTER_VALIDATE_INT, ['options' => [
+			'default' => 1,
+		]]);
+
+		System::jsonExit(self::ids(
+			[Contact::SHARING, Contact::FRIEND],
+			self::getUid($contact_id, $screen_name),
+			$cursor ?? $since_id ?? - $max_id,
+			$count,
+			$stringify_ids
+		));
+	}
+}

src/Module/Api/Twitter/FriendsList.php

@@ -0,0 +1,61 @@
+<?php
+/**
+ * @copyright Copyright (C) 2020, Friendica
+ *
+ * @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\Api\Twitter;
+
+use Friendica\Core\System;
+use Friendica\Model\Contact;
+
+/**
+ * @see https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-friends-list
+ */
+class FriendsList extends ContactEndpoint
+{
+	public static function rawContent(array $parameters = [])
+	{
+		// Expected value for user_id parameter: public/user contact id
+		$contact_id    = filter_input(INPUT_GET, 'user_id'      , FILTER_VALIDATE_INT);
+		$screen_name   = filter_input(INPUT_GET, 'screen_name');
+		$cursor        = filter_input(INPUT_GET, 'cursor'       , FILTER_VALIDATE_INT);
+		$count         = filter_input(INPUT_GET, 'count'        , FILTER_VALIDATE_INT, ['options' => [
+			'default' => self::DEFAULT_COUNT,
+			'min_range' => 1,
+			'max_range' => self::MAX_COUNT,
+		]]);
+		$skip_status           = filter_input(INPUT_GET, 'skip_status'          , FILTER_VALIDATE_BOOLEAN);
+		$include_user_entities = filter_input(INPUT_GET, 'include_user_entities', FILTER_VALIDATE_BOOLEAN);
+
+		// Friendica-specific
+		$since_id      = filter_input(INPUT_GET, 'since_id'     , FILTER_VALIDATE_INT);
+		$max_id        = filter_input(INPUT_GET, 'max_id'       , FILTER_VALIDATE_INT, ['options' => [
+			'default' => 1,
+		]]);
+
+		System::jsonExit(self::list(
+			[Contact::SHARING, Contact::FRIEND],
+			self::getUid($contact_id, $screen_name),
+			$cursor ?? $since_id ?? - $max_id,
+			$count,
+			$skip_status,
+			$include_user_entities
+		));
+	}
+}

src/Object/Api/Twitter/User.php

@@ -0,0 +1,153 @@
+<?php
+/**
+ * @copyright Copyright (C) 2020, Friendica
+ *
+ * @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\Object\Api\Twitter;
+
+use Friendica\BaseEntity;
+use Friendica\Content\ContactSelector;
+use Friendica\Content\Text\BBCode;
+
+/**
+ * @see https://developer.twitter.com/en/docs/tweets/data-dictionary/overview/user-object
+ */
+class User extends BaseEntity
+{
+	/** @var int */
+	protected $id;
+	/** @var string */
+	protected $id_str;
+	/** @var string */
+	protected $name;
+	/** @var string */
+	protected $screen_name;
+	/** @var string|null */
+	protected $location;
+	/** @var array */
+	protected $derived;
+	/** @var string|null */
+	protected $url;
+	/** @var array */
+	protected $entities;
+	/** @var string|null */
+	protected $description;
+	/** @var bool */
+	protected $protected;
+	/** @var bool */
+	protected $verified;
+	/** @var int */
+	protected $followers_count;
+	/** @var int */
+	protected $friends_count;
+	/** @var int */
+	protected $listed_count;
+	/** @var int */
+	protected $favourites_count;
+	/** @var int */
+	protected $statuses_count;
+	/** @var string */
+	protected $created_at;
+	/** @var string */
+	protected $profile_banner_url;
+	/** @var string */
+	protected $profile_image_url_https;
+	/** @var bool */
+	protected $default_profile;
+	/** @var bool */
+	protected $default_profile_image;
+	/** @var Status */
+	protected $status;
+	/** @var array */
+	protected $withheld_in_countries;
+	/** @var string */
+	protected $withheld_scope;
+
+	/**
+	 * @param array $publicContact         Full contact table record with uid = 0
+	 * @param array $apcontact             Optional full apcontact table record
+	 * @param array $userContact           Optional full contact table record with uid != 0
+	 * @param bool  $skip_status           Whether to remove the last status property, currently unused
+	 * @param bool  $include_user_entities Whether to add the entities property
+	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+	 */
+	public function __construct(array $publicContact, array $apcontact = [], array $userContact = [], $skip_status = false, $include_user_entities = true)
+	{
+		$this->id                      = $publicContact['id'];
+		$this->id_str                  = (string) $publicContact['id'];
+		$this->name                    = $publicContact['name'];
+		$this->screen_name             = $publicContact['nick'] ?: $publicContact['name'];
+		$this->location                = $publicContact['location'] ?:
+			ContactSelector::networkToName($publicContact['network'], $publicContact['url'], $publicContact['protocol']);
+		$this->derived                 = [];
+		$this->url                     = $publicContact['url'];
+		// No entities needed since we don't perform any shortening in the URL or description
+		$this->entities            = [
+			'url' => ['urls' => []],
+			'description' => ['urls' => []],
+		];
+		if (!$include_user_entities) {
+			unset($this->entities);
+		}
+		$this->description             = BBCode::toPlaintext($publicContact['about']);
+		$this->profile_image_url_https = $userContact['avatar'] ?? $publicContact['avatar'];
+		$this->protected               = false;
+		$this->followers_count         = $apcontact['followers_count'] ?? 0;
+		$this->friends_count           = $apcontact['following_count'] ?? 0;
+		$this->listed_count            = 0;
+		$this->created_at              = api_date($publicContact['created']);
+		$this->favourites_count        = 0;
+		$this->verified                = false;
+		$this->statuses_count          = $apcontact['statuses_count'] ?? 0;
+		$this->profile_banner_url      = '';
+		$this->default_profile         = false;
+		$this->default_profile_image   = false;
+
+		// @TODO Replace skip_status parameter with an optional Status parameter
+		unset($this->status);
+
+		//  Unused optional fields
+		unset($this->withheld_in_countries);
+		unset($this->withheld_scope);
+
+		// Deprecated
+		$this->profile_image_url              = $userContact['avatar'] ?? $publicContact['avatar'];
+		$this->profile_image_url_profile_size = $publicContact['thumb'];
+		$this->profile_image_url_large        = $publicContact['photo'];
+		$this->utc_offset                     = 0;
+		$this->time_zone                      = 'UTC';
+		$this->geo_enabled                    = false;
+		$this->lang                           = null;
+		$this->contributors_enabled           = false;
+		$this->is_translator                  = false;
+		$this->is_translation_enabled         = false;
+		$this->following                      = false;
+		$this->follow_request_sent            = false;
+		$this->statusnet_blocking             = false;
+		$this->notifications                  = false;
+
+		// Friendica-specific
+		$this->uid                   = $userContact['uid'] ?? 0;
+		$this->cid                   = $userContact['id'] ?? 0;
+		$this->pid                   = $publicContact['id'];
+		$this->self                  = $userContact['self'] ?? false;
+		$this->network               = $publicContact['network'];
+		$this->statusnet_profile_url = $publicContact['url'];
+	}
+}

static/routes.config.php

@@ -57,6 +57,10 @@ return [
 			'/profile/show'                      => [Module\Api\Friendica\Profile\Show::class , [R::GET         ]],
 			'/events'                            => [Module\Api\Friendica\Events\Index::class , [R::GET         ]],
 		],
+		'/followers/ids'                         => [Module\Api\Twitter\FollowersIds::class   , [R::GET         ]],
+		'/followers/list'                        => [Module\Api\Twitter\FollowersList::class  , [R::GET         ]],
+		'/friends/ids'                           => [Module\Api\Twitter\FriendsIds::class     , [R::GET         ]],
+		'/friends/list'                          => [Module\Api\Twitter\FriendsList::class    , [R::GET         ]],
 	],
 
 	'/admin'               => [

tests/FixtureTest.php

@@ -0,0 +1,53 @@
+<?php
+/**
+ * FixtureTest class.
+ */
+
+namespace Friendica\Test;
+
+use Dice\Dice;
+use Friendica\Core\Config\Cache;
+use Friendica\Core\Config\IConfig;
+use Friendica\Core\Session;
+use Friendica\Core\Session\ISession;
+use Friendica\Database\Database;
+use Friendica\Database\DBStructure;
+use Friendica\DI;
+use Friendica\Test\Util\Database\StaticDatabase;
+
+/**
+ * Parent class for test cases requiring fixtures
+ */
+abstract class FixtureTest extends DatabaseTest
+{
+	/** @var Dice */
+	protected $dice;
+
+	/**
+	 * Create variables used by tests.
+	 */
+	protected function setUp()
+	{
+		parent::setUp();
+
+		$this->dice = (new Dice())
+			->addRules(include __DIR__ . '/../static/dependencies.config.php')
+			->addRule(Database::class, ['instanceOf' => StaticDatabase::class, 'shared' => true])
+			->addRule(ISession::class, ['instanceOf' => Session\Memory::class, 'shared' => true, 'call' => null]);
+		DI::init($this->dice);
+
+		/** @var IConfig $config */
+		$configCache = $this->dice->create(Cache::class);
+		$configCache->set('database', 'disable_pdo', true);
+
+		/** @var Database $dba */
+		$dba = $this->dice->create(Database::class);
+
+		$dba->setTestmode(true);
+
+		DBStructure::checkInitialValues();
+
+		// Load the API dataset for the whole API
+		$this->loadFixture(__DIR__ . '/datasets/api.fixture.php', $dba);
+	}
+}

tests/datasets/api.fixture.php

@@ -99,6 +99,45 @@ return [
 			'rel'     => 2,
 			'network' => 'dfrn',
 		],
+		[
+			'id'      => 45,
+			'uid'     => 0,
+			'name'    => 'Friend contact',
+			'nick'    => 'friendcontact',
+			'self'    => 0,
+			'nurl'    => 'http://localhost/profile/friendcontact',
+			'url'     => 'http://localhost/profile/friendcontact',
+			'pending' => 0,
+			'blocked' => 0,
+			'rel'     => 2,
+			'network' => 'dfrn',
+		],
+		[
+			'id'      => 46,
+			'uid'     => 42,
+			'name'    => 'Mutual contact',
+			'nick'    => 'mutualcontact',
+			'self'    => 0,
+			'nurl'    => 'http://localhost/profile/mutualcontact',
+			'url'     => 'http://localhost/profile/mutualcontact',
+			'pending' => 0,
+			'blocked' => 0,
+			'rel'     => 3,
+			'network' => 'dfrn',
+		],
+		[
+			'id'      => 47,
+			'uid'     => 0,
+			'name'    => 'Mutual contact',
+			'nick'    => 'mutualcontact',
+			'self'    => 0,
+			'nurl'    => 'http://localhost/profile/mutualcontact',
+			'url'     => 'http://localhost/profile/mutualcontact',
+			'pending' => 0,
+			'blocked' => 0,
+			'rel'     => 2,
+			'network' => 'dfrn',
+		],
 	],
 	'item-uri'    => [
 		[

tests/include/ApiTest.php

@@ -5,19 +5,12 @@
 
 namespace Friendica\Test;
 
-use Dice\Dice;
 use Friendica\App;
 use Friendica\Core\Config\IConfig;
 use Friendica\Core\PConfig\IPConfig;
 use Friendica\Core\Protocol;
-use Friendica\Core\Session;
-use Friendica\Core\Session\ISession;
-use Friendica\Database\Database;
-use Friendica\Database\DBStructure;
 use Friendica\DI;
-use Friendica\Model\Contact;
 use Friendica\Network\HTTPException;
-use Friendica\Test\Util\Database\StaticDatabase;
 use Friendica\Util\Temporal;
 use Monolog\Handler\TestHandler;
 
@@ -29,7 +22,7 @@ require_once __DIR__ . '/../../include/api.php';
  * Functions that use header() need to be tested in a separate process.
  * @see https://phpunit.de/manual/5.7/en/appendixes.annotations.html#appendixes.annotations.runTestsInSeparateProcesses
  */
-class ApiTest extends DatabaseTest
+class ApiTest extends FixtureTest
 {
 	/**
 	 * @var TestHandler Can handle log-outputs
@@ -51,9 +44,6 @@ class ApiTest extends DatabaseTest
 	/** @var IConfig */
 	protected $config;
 
-	/** @var Dice */
-	protected $dice;
-
 	/**
 	 * Create variables used by tests.
 	 */
@@ -61,19 +51,6 @@ class ApiTest extends DatabaseTest
 	{
 		parent::setUp();
 
-		$this->dice = (new Dice())
-			->addRules(include __DIR__ . '/../../static/dependencies.config.php')
-			->addRule(Database::class, ['instanceOf' => StaticDatabase::class, 'shared' => true])
-			->addRule(ISession::class, ['instanceOf' => Session\Memory::class, 'shared' => true, 'call' => null]);
-		DI::init($this->dice);
-
-		/** @var Database $dba */
-		$dba = $this->dice->create(Database::class);
-
-		$dba->setTestmode(true);
-
-		DBStructure::checkInitialValues();
-
 		/** @var IConfig $config */
 		$this->config = $this->dice->create(IConfig::class);
 
@@ -88,8 +65,6 @@ class ApiTest extends DatabaseTest
 		$this->config->set('system', 'throttle_limit_month', 100);
 		$this->config->set('system', 'theme', 'system_theme');
 
-		// Load the API dataset for the whole API
-		$this->loadFixture(__DIR__ . '/../datasets/api.fixture.php', $dba);
 
 		/** @var App app */
 		$this->app = DI::app();
@@ -841,6 +816,22 @@ class ApiTest extends DatabaseTest
 		$this->assertEquals('ededed', $user['profile_background_color']);
 	}
 
+	/**
+	 * Test the api_get_user() function with an empty Frio schema.
+	 *
+	 * @return void
+	 */
+	public function testApiGetUserWithEmptyFrioSchema()
+	{
+		$pConfig = $this->dice->create(IPConfig::class);
+		$pConfig->set($this->selfUser['id'], 'frio', 'schema', '---');
+		$user = api_get_user($this->app);
+		$this->assertSelfUser($user);
+		$this->assertEquals('708fa0', $user['profile_sidebar_fill_color']);
+		$this->assertEquals('6fdbe8', $user['profile_link_color']);
+		$this->assertEquals('ededed', $user['profile_background_color']);
+	}
+
 	/**
 	 * Test the api_get_user() function with a custom Frio schema.
 	 *
@@ -860,22 +851,6 @@ class ApiTest extends DatabaseTest
 		$this->assertEquals('123456', $user['profile_background_color']);
 	}
 
-	/**
-	 * Test the api_get_user() function with an empty Frio schema.
-	 *
-	 * @return void
-	 */
-	public function testApiGetUserWithEmptyFrioSchema()
-	{
-		$pConfig = $this->dice->create(IPConfig::class);
-		$pConfig->set($this->selfUser['id'], 'frio', 'schema', '---');
-		$user = api_get_user($this->app);
-		$this->assertSelfUser($user);
-		$this->assertEquals('708fa0', $user['profile_sidebar_fill_color']);
-		$this->assertEquals('6fdbe8', $user['profile_link_color']);
-		$this->assertEquals('ededed', $user['profile_background_color']);
-	}
-
 	/**
 	 * Test the api_get_user() function with an user that is not allowed to use the API.
 	 *
@@ -2851,61 +2826,6 @@ class ApiTest extends DatabaseTest
 		$this->assertEquals('0.9.7', $result['version']);
 	}
 
-	/**
-	 * Test the api_ff_ids() function.
-	 *
-	 * @return void
-	 */
-	public function testApiFfIds()
-	{
-		$result = api_ff_ids('json', Contact::FOLLOWER);
-		$this->assertEquals(['id' => []], $result);
-	}
-
-	/**
-	 * Test the api_ff_ids() function with a result.
-	 *
-	 * @return void
-	 */
-	public function testApiFfIdsWithResult()
-	{
-		$this->markTestIncomplete();
-	}
-
-	/**
-	 * Test the api_ff_ids() function without an authenticated user.
-	 *
-	 * @return void
-	 * @expectedException Friendica\Network\HTTPException\ForbiddenException
-	 */
-	public function testApiFfIdsWithoutAuthenticatedUser()
-	{
-		$_SESSION['authenticated'] = false;
-		api_ff_ids('json', Contact::FOLLOWER);
-	}
-
-	/**
-	 * Test the api_friends_ids() function.
-	 *
-	 * @return void
-	 */
-	public function testApiFriendsIds()
-	{
-		$result = api_friends_ids('json');
-		$this->assertEquals(['id' => []], $result);
-	}
-
-	/**
-	 * Test the api_followers_ids() function.
-	 *
-	 * @return void
-	 */
-	public function testApiFollowersIds()
-	{
-		$result = api_followers_ids('json');
-		$this->assertEquals(['id' => []], $result);
-	}
-
 	/**
 	 * Test the api_direct_messages_new() function.
 	 *

tests/src/Module/Api/Twitter/ContactEndpointMock.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Friendica\Test\src\Module\Api\Twitter;
+
+/**
+ * Class ContactEndpointMock
+ *
+ * Exposes protected methods for test in the inherited class
+ *
+ * @method static int   getUid(int $contact_id = null, string $screen_name = null)
+ * @method static array list($rel, int $uid, int $cursor = -1, int $count = self::DEFAULT_COUNT, bool $skip_status = false, bool $include_user_entities = true)
+ * @method static array ids($rel, int $uid, int $cursor = -1, int $count = self::DEFAULT_COUNT, bool $stringify_ids = false)
+ *
+ * @package Friendica\Test\Mock\Module\Api\Twitter
+ */
+class ContactEndpointMock extends \Friendica\Module\Api\Twitter\ContactEndpoint
+{
+	public static function __callStatic($name, $arguments)
+	{
+		return self::$name(...$arguments);
+	}
+}

tests/src/Module/Api/Twitter/ContactEndpointTest.php

@@ -0,0 +1,254 @@
+<?php
+
+namespace Friendica\Test\src\Module\Api\Twitter;
+
+use Friendica\Model\Contact;
+use Friendica\Module\Api\Twitter\ContactEndpoint;
+use Friendica\Network\HTTPException\NotFoundException;
+use Friendica\Object\Api\Twitter\User;
+use Friendica\Test\FixtureTest;
+
+class ContactEndpointTest extends FixtureTest
+{
+	public function testGetUid()
+	{
+		$this->assertSame(42, ContactEndpointMock::getUid(42));
+		$this->assertSame(42, ContactEndpointMock::getUid(null, 'selfcontact'));
+		$this->assertSame(42, ContactEndpointMock::getUid(84, 'selfcontact'));
+	}
+
+	public function testGetUidContactIdNotFound()
+	{
+		$this->expectException(NotFoundException::class);
+		$this->expectExceptionMessage('Contact not found');
+
+		ContactEndpointMock::getUid(84);
+	}
+
+	public function testGetUidScreenNameNotFound()
+	{
+		$this->expectException(NotFoundException::class);
+		$this->expectExceptionMessage('User not found');
+
+		ContactEndpointMock::getUid(null, 'othercontact');
+	}
+
+	public function testGetUidContactIdScreenNameNotFound()
+	{
+		$this->expectException(NotFoundException::class);
+		$this->expectExceptionMessage('User not found');
+
+		ContactEndpointMock::getUid(42, 'othercontact');
+	}
+
+	public function testIds()
+	{
+		$expectedEmpty = [
+			'ids' => [],
+			'next_cursor' => -1,
+			'next_cursor_str' => '-1',
+			'previous_cursor' => 0,
+			'previous_cursor_str' => '0',
+			'total_count' => 0,
+		];
+
+		$this->assertSame($expectedEmpty, ContactEndpointMock::ids(Contact::FOLLOWER, 42));
+
+		$expectedFriend = [
+			'ids' => [47],
+			'next_cursor' => 0,
+			'next_cursor_str' => '0',
+			'previous_cursor' => 0,
+			'previous_cursor_str' => '0',
+			'total_count' => 1,
+		];
+
+		$this->assertSame($expectedFriend, ContactEndpointMock::ids(Contact::FRIEND, 42));
+		$this->assertSame($expectedFriend, ContactEndpointMock::ids([Contact::FOLLOWER, Contact::FRIEND], 42));
+
+		$result = ContactEndpointMock::ids(Contact::SHARING, 42);
+
+		$this->assertArrayHasKey('ids', $result);
+		$this->assertContainsOnly('int', $result['ids']);
+		$this->assertSame(45, $result['ids'][0]);
+
+		$result = ContactEndpointMock::ids([Contact::SHARING, Contact::FRIEND], 42);
+
+		$this->assertArrayHasKey('ids', $result);
+		$this->assertContainsOnly('int', $result['ids']);
+		$this->assertSame(45, $result['ids'][0]);
+	}
+
+	/**
+	 * @depends testIds
+	 *
+	 * @throws NotFoundException
+	 */
+	public function testIdsStringify()
+	{
+		$result = ContactEndpointMock::ids(Contact::SHARING, 42, -1, ContactEndpoint::DEFAULT_COUNT, true);
+
+		$this->assertArrayHasKey('ids', $result);
+		$this->assertContainsOnly('string', $result['ids']);
+		$this->assertSame('45', $result['ids'][0]);
+	}
+
+	public function testIdsPagination()
+	{
+		$expectedDefaultPageResult = [
+			'ids' => [45],
+			'next_cursor' => 44,
+			'next_cursor_str' => '44',
+			'previous_cursor' => 0,
+			'previous_cursor_str' => '0',
+			'total_count' => 2,
+		];
+
+		$result = ContactEndpointMock::ids([Contact::SHARING, Contact::FRIEND], 42, -1, 1);
+
+		$this->assertSame($expectedDefaultPageResult, $result);
+
+		$nextPageCursor = $result['next_cursor'];
+
+		$expectedSecondPageResult = [
+			'ids' => [47],
+			'next_cursor' => 46,
+			'next_cursor_str' => '46',
+			'previous_cursor' => -46,
+			'previous_cursor_str' => '-46',
+			'total_count' => 2,
+		];
+
+		$result = ContactEndpointMock::ids([Contact::SHARING, Contact::FRIEND], 42, $nextPageCursor, 1);
+
+		$this->assertSame($expectedSecondPageResult, $result);
+
+		$firstPageCursor = $result['previous_cursor'];
+		$emptyNextPageCursor = $result['next_cursor'];
+
+		$expectedFirstPageResult = [
+			'ids' => [45],
+			'next_cursor' => 44,
+			'next_cursor_str' => '44',
+			'previous_cursor' => -44,
+			'previous_cursor_str' => '-44',
+			'total_count' => 2,
+		];
+
+		$result = ContactEndpointMock::ids([Contact::SHARING, Contact::FRIEND], 42, $firstPageCursor, 1);
+
+		$this->assertSame($expectedFirstPageResult, $result);
+
+		$emptyPrevPageCursor = $result['previous_cursor'];
+
+		$expectedEmptyPrevPageResult = [
+			'ids' => [],
+			'next_cursor' => -1,
+			'next_cursor_str' => '-1',
+			'previous_cursor' => 0,
+			'previous_cursor_str' => '0',
+			'total_count' => 2,
+		];
+
+		$result = ContactEndpointMock::ids([Contact::SHARING, Contact::FRIEND], 42, $emptyPrevPageCursor, 1);
+
+		$this->assertSame($expectedEmptyPrevPageResult, $result);
+
+		$expectedEmptyNextPageResult = [
+			'ids' => [],
+			'next_cursor' => 0,
+			'next_cursor_str' => '0',
+			'previous_cursor' => -46,
+			'previous_cursor_str' => '-46',
+			'total_count' => 2,
+		];
+
+		$result = ContactEndpointMock::ids([Contact::SHARING, Contact::FRIEND], 42, $emptyNextPageCursor, 1);
+
+		$this->assertSame($expectedEmptyNextPageResult, $result);
+	}
+
+	/**
+	 * @depends testIds
+	 *
+	 * @throws NotFoundException
+	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+	 * @throws \ImagickException
+	 */
+	public function testList()
+	{
+		$expectedEmpty = [
+			'users' => [],
+			'next_cursor' => -1,
+			'next_cursor_str' => '-1',
+			'previous_cursor' => 0,
+			'previous_cursor_str' => '0',
+			'total_count' => 0,
+		];
+
+		$this->assertSame($expectedEmpty, ContactEndpointMock::list(Contact::FOLLOWER, 42));
+
+		$expectedFriendContactUser = [
+			'id' => 45,
+			'id_str' => '45',
+			'name' => 'Friend contact',
+			'screen_name' => 'friendcontact',
+			'location' => 'DFRN',
+			'derived' => [],
+			'url' => 'http://localhost/profile/friendcontact',
+			'entities' => [
+				'url' => [
+					'urls' => [],
+				],
+				'description' => [
+					'urls' => [],
+				],
+			],
+			'description' => '',
+			'protected' => false,
+			'verified' => false,
+			'followers_count' => 0,
+			'friends_count' => 0,
+			'listed_count' => 0,
+			'favourites_count' => 0,
+			'statuses_count' => 0,
+			'created_at' => 'Fri Feb 02 00:00:00 +0000 0000',
+			'profile_banner_url' => '',
+			'profile_image_url_https' => '',
+			'default_profile' => false,
+			'default_profile_image' => false,
+			'profile_image_url' => '',
+			'profile_image_url_profile_size' => '',
+			'profile_image_url_large' => '',
+			'utc_offset' => 0,
+			'time_zone' => 'UTC',
+			'geo_enabled' => false,
+			'lang' => NULL,
+			'contributors_enabled' => false,
+			'is_translator' => false,
+			'is_translation_enabled' => false,
+			'following' => false,
+			'follow_request_sent' => false,
+			'statusnet_blocking' => false,
+			'notifications' => false,
+			'uid' => 42,
+			'cid' => 44,
+			'pid' => 45,
+			'self' => 0,
+			'network' => 'dfrn',
+			'statusnet_profile_url' => 'http://localhost/profile/friendcontact',
+		];
+
+		$result = ContactEndpointMock::list(Contact::SHARING, 42);
+
+		$this->assertArrayHasKey('users', $result);
+		$this->assertContainsOnlyInstancesOf(User::class, $result['users']);
+		$this->assertSame($expectedFriendContactUser, $result['users'][0]->toArray());
+
+		$result = ContactEndpointMock::list([Contact::SHARING, Contact::FRIEND], 42);
+
+		$this->assertArrayHasKey('users', $result);
+		$this->assertContainsOnlyInstancesOf(User::class, $result['users']);
+		$this->assertSame($expectedFriendContactUser, $result['users'][0]->toArray());
+	}
+}