X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FCore%2FProtocol.php;h=bce6bc699cc8cd31b9966f99faed31e7798736c8;hb=72fae04e9705bf14181095efc4cd23dec883681a;hp=4467bf00271eaba360847818cd7f610a799ebc0b;hpb=c9f02d534e2016acf18d7fa18db193d056495841;p=friendica.git

diff --git a/src/Core/Protocol.php b/src/Core/Protocol.php
index 4467bf0027..bce6bc699c 100644
--- a/src/Core/Protocol.php
+++ b/src/Core/Protocol.php
@@ -1,48 +1,120 @@
 <?php
-/*
- * @file src/Core/Protocol.php
+/**
+ * @copyright Copyright (C) 2010-2021, 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\Core;
 
-use Friendica\Util\Network;
+use Friendica\DI;
+use Friendica\Network\HTTPException;
+use Friendica\Protocol\Activity;
+use Friendica\Protocol\ActivityPub;
+use Friendica\Protocol\Diaspora;
+use Friendica\Protocol\OStatus;
+use Friendica\Protocol\Salmon;
 
 /**
  * Manage compatibility with federated networks
- *
- * @author Hypolite Petovan <mrpetovan@gmail.com>
  */
 class Protocol
 {
-	const DFRN      = 'dfrn';    // Friendica, Mistpark, other DFRN implementations
-	const DIASPORA  = 'dspr';    // Diaspora
-	const DIASPORA2 = 'dspc';    // Diaspora connector
-	const STATUSNET = 'stac';    // Statusnet connector
-	const OSTATUS   = 'stat';    // GNU-social, Pleroma, Mastodon, other OStatus implementations
-	const FEED      = 'feed';    // RSS/Atom feeds with no known "post/notify" protocol
-	const MAIL      = 'mail';    // IMAP/POP
-	const XMPP      = 'xmpp';    // XMPP - Currently unsupported
+	// Native support
+	const ACTIVITYPUB = 'apub';    // ActivityPub (Pleroma, Mastodon, Osada, ...)
+	const DFRN        = 'dfrn';    // Friendica, Mistpark, other DFRN implementations
+	const DIASPORA    = 'dspr';    // Diaspora, Hubzilla, Socialhome, Ganggo
+	const FEED        = 'feed';    // RSS/Atom feeds with no known "post/notify" protocol
+	const MAIL        = 'mail';    // IMAP/POP
+	const OSTATUS     = 'stat';    // GNU Social and other OStatus implementations
+
+	const NATIVE_SUPPORT = [self::DFRN, self::DIASPORA, self::OSTATUS, self::FEED, self::MAIL, self::ACTIVITYPUB];
+
+	const FEDERATED = [self::DFRN, self::DIASPORA, self::OSTATUS, self::ACTIVITYPUB];
+
+	const SUPPORT_PRIVATE = [self::DFRN, self::DIASPORA, self::MAIL, self::ACTIVITYPUB, self::PUMPIO];
 
-	const FACEBOOK  = 'face';    // Facebook API
+	// Supported through a connector
+	const DIASPORA2 = 'dspc';    // Diaspora connector
 	const LINKEDIN  = 'lnkd';    // LinkedIn
-	const MYSPACE   = 'mysp';    // MySpace - Currently unsupported
-	const GPLUS     = 'goog';    // Google+
 	const PUMPIO    = 'pump';    // pump.io
+	const STATUSNET = 'stac';    // Statusnet connector
 	const TWITTER   = 'twit';    // Twitter
+	const DISCOURSE = 'dscs';    // Discourse
+
+	// Dead protocols
 	const APPNET    = 'apdn';    // app.net - Dead protocol
+	const FACEBOOK  = 'face';    // Facebook API - Not working anymore, API is closed
+	const GPLUS     = 'goog';    // Google+ - Dead in 2019
 
-	const NEWS      = 'nntp';    // Network News Transfer Protocol - Currently unsupported
-	const ICALENDAR = 'ical';    // iCalendar - Currently unsupported
-	const PNUT      = 'pnut';    // pnut.io - Currently unsupported
-	const ZOT       = 'zot!';    // Zot! - Currently unsupported
+	// Currently unsupported
+	const ICALENDAR = 'ical';    // iCalendar
+	const MYSPACE   = 'mysp';    // MySpace
+	const NEWS      = 'nntp';    // Network News Transfer Protocol
+	const PNUT      = 'pnut';    // pnut.io
+	const XMPP      = 'xmpp';    // XMPP
+	const ZOT       = 'zot!';    // Zot!
 
 	const PHANTOM   = 'unkn';    // Place holder
 
+	/**
+	 * Returns whether the provided protocol supports following
+	 *
+	 * @param $protocol
+	 * @return bool
+	 * @throws HTTPException\InternalServerErrorException
+	 */
+	public static function supportsFollow($protocol): bool
+	{
+		if (in_array($protocol, self::NATIVE_SUPPORT)) {
+			return true;
+		}
+
+		$result = null;
+		Hook::callAll('support_follow', $result);
+
+		return $result === true;
+	}
+
+	/**
+	 * Returns whether the provided protocol supports revoking inbound follows
+	 *
+	 * @param $protocol
+	 * @return bool
+	 * @throws HTTPException\InternalServerErrorException
+	 */
+	public static function supportsRevokeFollow($protocol): bool
+	{
+		if (in_array($protocol, self::NATIVE_SUPPORT)) {
+			return true;
+		}
+
+		$result = null;
+		Hook::callAll('support_revoke_follow', $result);
+
+		return $result === true;
+	}
+
 	/**
 	 * Returns the address string for the provided profile URL
 	 *
 	 * @param string $profile_url
 	 * @return string
-	 * @throws Exception
+	 * @throws \Exception
 	 */
 	public static function getAddrFromProfileUrl($profile_url)
 	{
@@ -61,8 +133,8 @@ class Protocol
 	 * Guesses the network from a profile URL
 	 *
 	 * @param string $profile_url
-	 * @param array  $matches     preg_match return array: [0] => Full match [1] => hostname [2] => username
-	 * @return type
+	 * @param array  $matches preg_match return array: [0] => Full match [1] => hostname [2] => username
+	 * @return string
 	 */
 	public static function matchByProfileUrl($profile_url, &$matches = [])
 	{
@@ -94,7 +166,7 @@ class Protocol
 		if (preg_match('=https?://(.*)/user/(.*)=ism', $profile_url, $matches)) {
 			$statusnet_host = $matches[1];
 			$statusnet_user = $matches[2];
-			$UserData = Network::fetchUrl('http://' . $statusnet_host . '/api/users/show.json?user_id=' . $statusnet_user);
+			$UserData = DI::httpClient()->fetch('http://' . $statusnet_host . '/api/users/show.json?user_id=' . $statusnet_user);
 			$user = json_decode($UserData);
 			if ($user) {
 				$matches[2] = $user->screen_name;
@@ -102,6 +174,13 @@ class Protocol
 			}
 		}
 
+		// Mastodon, Pleroma
+		if (preg_match('=https?://(.+?)/users/(.+)=ism', $profile_url, $matches)
+			|| preg_match('=https?://(.+?)/@(.+)=ism', $profile_url, $matches)
+		) {
+			return self::ACTIVITYPUB;
+		}
+
 		// pumpio (http://host.name/user)
 		if (preg_match('=https?://([\.\w]+)/([\.\w]+)$=ism', $profile_url, $matches)) {
 			return self::PUMPIO;
@@ -116,9 +195,101 @@ class Protocol
 	 * @param string $profile_url
 	 * @param string $display_name
 	 * @return string
+	 * @throws \Exception
 	 */
 	public static function formatMention($profile_url, $display_name)
 	{
 		return $display_name . ' (' . self::getAddrFromProfileUrl($profile_url) . ')';
 	}
+
+	/**
+	 * Sends an unfriend message. Does not remove the contact
+	 *
+	 * @param array   $user    User unfriending
+	 * @param array   $contact Contact unfriended
+	 * @param boolean $two_way Revoke eventual inbound follow as well
+	 * @return bool|null true if successful, false if not, null if no action was performed
+	 * @throws HTTPException\InternalServerErrorException
+	 * @throws \ImagickException
+	 */
+	public static function terminateFriendship(array $user, array $contact, bool $two_way = false): bool
+	{
+		if (empty($contact['network'])) {
+			throw new \InvalidArgumentException('Missing network key in contact array');
+		}
+
+		$protocol = $contact['network'];
+		if (($protocol == Protocol::DFRN) && !empty($contact['protocol'])) {
+			$protocol = $contact['protocol'];
+		}
+
+		if (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
+			// create an unfollow slap
+			$item = [];
+			$item['verb'] = Activity::O_UNFOLLOW;
+			$item['gravity'] = GRAVITY_ACTIVITY;
+			$item['follow'] = $contact['url'];
+			$item['body'] = '';
+			$item['title'] = '';
+			$item['guid'] = '';
+			$item['uri-id'] = 0;
+			$slap = OStatus::salmon($item, $user);
+
+			if (empty($contact['notify'])) {
+				throw new \InvalidArgumentException('Missing expected "notify" key in OStatus/DFRN contact');
+			}
+
+			return Salmon::slapper($user, $contact['notify'], $slap) === 0;
+		} elseif ($protocol == Protocol::DIASPORA) {
+			return Diaspora::sendUnshare($user, $contact) > 0;
+		} elseif ($protocol == Protocol::ACTIVITYPUB) {
+			if ($two_way) {
+				ActivityPub\Transmitter::sendContactReject($contact['url'], $contact['hub-verify'], $user['uid']);
+			}
+
+			return ActivityPub\Transmitter::sendContactUndo($contact['url'], $contact['id'], $user['uid']);
+		}
+
+		// Catch-all hook for connector addons
+		$hook_data = [
+			'contact' => $contact,
+			'two_way' => $two_way,
+			'result' => null
+		];
+		Hook::callAll('unfollow', $hook_data);
+
+		return $hook_data['result'];
+	}
+
+	/**
+	 * Revoke an incoming follow from the provided contact
+	 *
+	 * @param array $contact Private contact (uid != 0) array
+	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+	 * @throws \ImagickException
+	 */
+	public static function revokeFollow(array $contact)
+	{
+		if (empty($contact['network'])) {
+			throw new \InvalidArgumentException('Missing network key in contact array');
+		}
+
+		$protocol = $contact['network'];
+		if ($protocol == Protocol::DFRN && !empty($contact['protocol'])) {
+			$protocol = $contact['protocol'];
+		}
+
+		if ($protocol == Protocol::ACTIVITYPUB) {
+			return ActivityPub\Transmitter::sendContactReject($contact['url'], $contact['hub-verify'], $contact['uid']);
+		}
+
+		// Catch-all hook for connector addons
+		$hook_data = [
+			'contact' => $contact,
+			'result' => null,
+		];
+		Hook::callAll('revoke_follow', $hook_data);
+
+		return $hook_data['result'];
+	}
 }