<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social 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.
//
// GNU social 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 GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* ActivityPub implementation for GNU social
*
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
* @link http://www.gnu.org/software/social/
*/
defined('GNUSOCIAL') || die();
// Import required files by the plugin
require_once __DIR__ . DIRECTORY_SEPARATOR . 'lib' . DIRECTORY_SEPARATOR . 'httpsignature.php';
require_once __DIR__ . DIRECTORY_SEPARATOR . 'lib' . DIRECTORY_SEPARATOR . 'discoveryhints.php';
require_once __DIR__ . DIRECTORY_SEPARATOR . 'lib' . DIRECTORY_SEPARATOR . 'explorer.php';
require_once __DIR__ . DIRECTORY_SEPARATOR . 'lib' . DIRECTORY_SEPARATOR . 'postman.php';
require_once __DIR__ . DIRECTORY_SEPARATOR . 'lib' . DIRECTORY_SEPARATOR . 'inbox_handler.php';
// So that this isn't hardcoded everywhere
define('ACTIVITYPUB_BASE_ACTOR_URI', common_root_url().'index.php/user/');
const ACTIVITYPUB_PUBLIC_TO = ['https://www.w3.org/ns/activitystreams#Public',
'Public',
'as:Public'
];
/**
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class ActivityPubPlugin extends Plugin
{
const PLUGIN_VERSION = '22.1.1dev';
/**
* Returns a Actor's URI from its local $profile
* Works both for local and remote users.
*
* @param Profile $profile Actor's local profile
* @return string Actor's URI
* @throws Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public static function actor_uri($profile)
{
if ($profile->isLocal()) {
return ACTIVITYPUB_BASE_ACTOR_URI.$profile->getID();
} else {
return $profile->getUri();
}
}
/**
* Returns a Actor's URL from its local $profile
* Works both for local and remote users.
*
* @param Profile $profile Actor's local profile
* @return string Actor's URL
* @throws Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public static function actor_url($profile)
{
return ActivityPubPlugin::actor_uri($profile)."/";
}
/**
* Returns a notice from its URL.
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param string $url Notice's URL
* @return Notice The Notice object
* @throws Exception This function or provides a Notice or fails with exception
*/
public static function grab_notice_from_url($url)
{
/* Offline Grabbing */
try {
// Look for a known remote notice
return Notice::getByUri($url);
} catch (Exception $e) {
// Look for a local notice (unfortunately GNU social doesn't
// provide this functionality natively)
try {
$candidate = Notice::getByID(intval(substr($url, (strlen(common_local_url('apNotice', ['id' => 0]))-1))));
if (common_local_url('apNotice', ['id' => $candidate->getID()]) === $url) { // Sanity check
return $candidate;
} else {
common_debug('ActivityPubPlugin Notice Grabber: '.$candidate->getUrl(). ' is different of '.$url);
}
} catch (Exception $e) {
common_debug('ActivityPubPlugin Notice Grabber: failed to find: '.$url.' offline.');
}
}
/* Online Grabbing */
$client = new HTTPClient();
$headers = [];
$headers[] = 'Accept: application/ld+json; profile="https://www.w3.org/ns/activitystreams"';
$headers[] = 'User-Agent: GNUSocialBot v0.1 - https://gnu.io/social';
$response = $client->get($url, $headers);
$object = json_decode($response->getBody(), true);
Activitypub_notice::validate_note($object);
return Activitypub_notice::create_notice($object);
}
/**
* Route/Reroute urls
*
* @param URLMapper $m
* @return void
* @throws Exception
*/
public function onRouterInitialized(URLMapper $m)
{
$acceptHeaders = [
'application/ld+json; profile="https://www.w3.org/ns/activitystreams"' => 0,
'application/activity+json' => 1,
'application/json' => 2,
'application/ld+json' => 3
];
$m->connect('user/:id',
['action' => 'apActorProfile'],
['id' => '[0-9]+'],
true,
$acceptHeaders);
$m->connect(':nickname',
['action' => 'apActorProfile'],
['nickname' => Nickname::DISPLAY_FMT],
true,
$acceptHeaders);
$m->connect(':nickname/',
['action' => 'apActorProfile'],
['nickname' => Nickname::DISPLAY_FMT],
true,
$acceptHeaders);
$m->connect('notice/:id',
['action' => 'apNotice'],
['id' => '[0-9]+'],
true,
$acceptHeaders);
$m->connect(
'user/:id/liked.json',
['action' => 'apActorLiked'],
['id' => '[0-9]+']
);
$m->connect(
'user/:id/followers.json',
['action' => 'apActorFollowers'],
['id' => '[0-9]+']
);
$m->connect(
'user/:id/following.json',
['action' => 'apActorFollowing'],
['id' => '[0-9]+']
);
$m->connect(
'user/:id/inbox.json',
['action' => 'apInbox'],
['id' => '[0-9]+']
);
$m->connect(
'user/:id/outbox.json',
['action' => 'apActorOutbox'],
['id' => '[0-9]+']
);
$m->connect(
'inbox.json',
['action' => 'apInbox']
);
}
/**
* Plugin version information
*
* @param array $versions
* @return bool hook true
*/
public function onPluginVersion(array &$versions)
{
$versions[] = [
'name' => 'ActivityPub',
'version' => self::PLUGIN_VERSION,
'author' => 'Diogo Cordeiro',
'homepage' => 'https://notabug.org/diogo/gnu-social/src/activitypub/plugins/ActivityPub',
// TRANS: Plugin description.
'rawdescription' => _m('Follow people across social networks that implement '.
'<a href="https://activitypub.rocks/">ActivityPub</a>.')
];
return true;
}
/**
* Plugin Nodeinfo information
*
* @param array $protocols
* @return bool hook true
*/
public function onNodeInfoProtocols(array &$protocols)
{
$protocols[] = "activitypub";
return true;
}
/**
* Adds an indicator on Remote ActivityPub profiles.
*
* @param HTMLOutputter $out
* @param Profile $profile
* @return boolean hook return value
* @throws Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function onEndShowAccountProfileBlock(HTMLOutputter $out, Profile $profile)
{
if ($profile->isLocal()) {
return true;
}
try {
Activitypub_profile::from_profile($profile);
} catch (Exception $e) {
// Not a remote ActivityPub_profile! Maybe some other network
// that has imported a non-local user (e.g.: OStatus)?
return true;
}
$out->elementStart('dl', 'entity_tags activitypub_profile');
$out->element('dt', null, 'ActivityPub');
$out->element('dd', null, _m('Remote Profile'));
$out->elementEnd('dl');
return true;
}
/**
* Make sure necessary tables are filled out.
*
* @return boolean hook true
*/
public function onCheckSchema()
{
$schema = Schema::get();
$schema->ensureTable('activitypub_profile', Activitypub_profile::schemaDef());
$schema->ensureTable('activitypub_rsa', Activitypub_rsa::schemaDef());
$schema->ensureTable('activitypub_pending_follow_requests', Activitypub_pending_follow_requests::schemaDef());
return true;
}
/********************************************************
* WebFinger Events *
********************************************************/
/**
* Get remote user's ActivityPub_profile via a identifier
*
* @author GNU social
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param string $arg A remote user identifier
* @return Activitypub_profile|null Valid profile in success | null otherwise
*/
public static function pull_remote_profile($arg)
{
if (preg_match('!^((?:\w+\.)*\w+@(?:\w+\.)*\w+(?:\w+\-\w+)*\.\w+)$!', $arg)) {
// webfinger lookup
try {
return Activitypub_profile::ensure_web_finger($arg);
} catch (Exception $e) {
common_log(LOG_ERR, 'Webfinger lookup failed for ' .
$arg . ': ' . $e->getMessage());
}
}
// Look for profile URLs, with or without scheme:
$urls = [];
if (preg_match('!^https?://((?:\w+\.)*\w+(?:\w+\-\w+)*\.\w+(?:/\w+)+)$!', $arg)) {
$urls[] = $arg;
}
if (preg_match('!^((?:\w+\.)*\w+(?:\w+\-\w+)*\.\w+(?:/\w+)+)$!', $arg)) {
$schemes = array('http', 'https');
foreach ($schemes as $scheme) {
$urls[] = "$scheme://$arg";
}
}
foreach ($urls as $url) {
try {
return Activitypub_profile::fromUri($url);
} catch (Exception $e) {
common_log(LOG_ERR, 'Profile lookup failed for ' .
$arg . ': ' . $e->getMessage());
}
}
return null;
}
/**
* Webfinger matches: @user@example.com or even @user--one.george_orwell@1984.biz
*
* @author GNU social
* @param string $text The text from which to extract webfinger IDs
* @param string $preMention Character(s) that signals a mention ('@', '!'...)
* @return array The matching IDs (without $preMention) and each respective position in the given string.
*/
public static function extractWebfingerIds($text, $preMention='@')
{
$wmatches = [];
$result = preg_match_all(
'/(?<!\S)'.preg_quote($preMention, '/').'('.Nickname::WEBFINGER_FMT.')/',
$text,
$wmatches,
PREG_OFFSET_CAPTURE
);
if ($result === false) {
common_log(LOG_ERR, __METHOD__ . ': Error parsing webfinger IDs from text (preg_last_error=='.preg_last_error().').');
return [];
} elseif ($n_matches = count($wmatches)) {
common_debug(sprintf('Found %d matches for WebFinger IDs: %s', $n_matches, _ve($wmatches)));
}
return $wmatches[1];
}
/**
* Profile URL matches: @example.com/mublog/user
*
* @author GNU social
* @param string $text The text from which to extract URL mentions
* @param string $preMention Character(s) that signals a mention ('@', '!'...)
* @return array The matching URLs (without @ or acct:) and each respective position in the given string.
*/
public static function extractUrlMentions($text, $preMention='@')
{
$wmatches = [];
// In the regexp below we need to match / _before_ URL_REGEX_VALID_PATH_CHARS because it otherwise gets merged
// with the TLD before (but / is in URL_REGEX_VALID_PATH_CHARS anyway, it's just its positioning that is important)
$result = preg_match_all(
'/(?:^|\s+)'.preg_quote($preMention, '/').'('.URL_REGEX_DOMAIN_NAME.'(?:\/['.URL_REGEX_VALID_PATH_CHARS.']*)*)/',
$text,
$wmatches,
PREG_OFFSET_CAPTURE
);
if ($result === false) {
common_log(LOG_ERR, __METHOD__ . ': Error parsing profile URL mentions from text (preg_last_error=='.preg_last_error().').');
return [];
} elseif (count($wmatches)) {
common_debug(sprintf('Found %d matches for profile URL mentions: %s', count($wmatches), _ve($wmatches)));
}
return $wmatches[1];
}
/**
* Add activity+json mimetype on WebFinger
*
* @param XML_XRD $xrd
* @param Managed_DataObject $object
* @throws Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function onEndWebFingerProfileLinks(XML_XRD &$xrd, Managed_DataObject $object)
{
if ($object->isPerson()) {
$link = new XML_XRD_Element_Link(
'self',
ActivityPubPlugin::actor_uri($object->getProfile()),
'application/activity+json'
);
$xrd->links[] = clone($link);
}
}
/**
* Find any explicit remote mentions. Accepted forms:
* Webfinger: @user@example.com
* Profile link:
* @param Profile $sender
* @param string $text input markup text
* @param $mentions
* @return boolean hook return value
* @throws InvalidUrlException
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @example.com/mublog/user
*
* @author GNU social
*/
public function onEndFindMentions(Profile $sender, $text, &$mentions)
{
$matches = [];
foreach (self::extractWebfingerIds($text, '@') as $wmatch) {
list($target, $pos) = $wmatch;
$this->log(LOG_INFO, "Checking webfinger person '$target'");
$profile = null;
try {
$aprofile = Activitypub_profile::ensure_web_finger($target);
$profile = $aprofile->local_profile();
} catch (Exception $e) {
$this->log(LOG_ERR, "Webfinger check failed: " . $e->getMessage());
continue;
}
assert($profile instanceof Profile);
$displayName = !empty($profile->nickname) && mb_strlen($profile->nickname) < mb_strlen($target)
? $profile->getNickname() // TODO: we could do getBestName() or getFullname() here
: $target;
$url = $profile->getUri();
if (!common_valid_http_url($url)) {
$url = $profile->getUrl();
}
$matches[$pos] = array('mentioned' => array($profile),
'type' => 'mention',
'text' => $displayName,
'position' => $pos,
'length' => mb_strlen($target),
'url' => $url);
}
foreach (self::extractUrlMentions($text) as $wmatch) {
list($target, $pos) = $wmatch;
$schemes = array('https', 'http');
foreach ($schemes as $scheme) {
$url = "$scheme://$target";
$this->log(LOG_INFO, "Checking profile address '$url'");
try {
$aprofile = Activitypub_profile::fromUri($url);
$profile = $aprofile->local_profile();
$displayName = !empty($profile->nickname) && mb_strlen($profile->nickname) < mb_strlen($target) ?
$profile->nickname : $target;
$matches[$pos] = array('mentioned' => array($profile),
'type' => 'mention',
'text' => $displayName,
'position' => $pos,
'length' => mb_strlen($target),
'url' => $profile->getUrl());
break;
} catch (Exception $e) {
$this->log(LOG_ERR, "Profile check failed: " . $e->getMessage());
}
}
}
foreach ($mentions as $i => $other) {
// If we share a common prefix with a local user, override it!
$pos = $other['position'];
if (isset($matches[$pos])) {
$mentions[$i] = $matches[$pos];
unset($matches[$pos]);
}
}
foreach ($matches as $mention) {
$mentions[] = $mention;
}
return true;
}
/**
* Allow remote profile references to be used in commands:
* sub update@status.net
* whois evan@identi.ca
* reply http://identi.ca/evan hey what's up
*
* @param Command $command
* @param string $arg
* @param Profile &$profile
* @return boolean hook return code
* @author GNU social
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function onStartCommandGetProfile($command, $arg, &$profile)
{
try {
$aprofile = $this->pull_remote_profile($arg);
$profile = $aprofile->local_profile();
} catch (Exception $e) {
// No remote ActivityPub profile found
return true;
}
return false;
}
/********************************************************
* Discovery Events *
********************************************************/
/**
* Profile URI for remote profiles.
*
* @author GNU social
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param Profile $profile
* @param string $uri in/out
* @return mixed hook return code
*/
public function onStartGetProfileUri(Profile $profile, &$uri)
{
$aprofile = Activitypub_profile::getKV('profile_id', $profile->id);
if ($aprofile instanceof Activitypub_profile) {
$uri = $aprofile->getUri();
return false;
}
return true;
}
/**
* Profile from URI.
*
* @author GNU social
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param string $uri
* @param Profile &$profile in/out param: Profile got from URI
* @return mixed hook return code
*/
public function onStartGetProfileFromURI($uri, &$profile)
{
try {
$explorer = new Activitypub_explorer();
$profile = $explorer->lookup($uri)[0];
return false;
} catch (Exception $e) {
return true; // It's not an ActivityPub profile as far as we know, continue event handling
}
}
/********************************************************
* Delivery Events *
********************************************************/
/**
* Having established a remote subscription, send a notification to the
* remote ActivityPub profile's endpoint.
*
* @param Profile $profile subscriber
* @param Profile $other subscribee
* @return bool return value
* @throws HTTP_Request2_Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function onStartSubscribe(Profile $profile, Profile $other) {
if (!$profile->isLocal() && $other->isLocal()) {
return true;
}
try {
$other = Activitypub_profile::from_profile($other);
} catch (Exception $e) {
return true; // Let other plugin handle this instead
}
$postman = new Activitypub_postman($profile, array($other));
$postman->follow();
return true;
}
/**
* Notify remote server on unsubscribe.
*
* @param Profile $profile
* @param Profile $other
* @return bool return value
* @throws HTTP_Request2_Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function onStartUnsubscribe(Profile $profile, Profile $other)
{
if (!$profile->isLocal() && $other->isLocal()) {
return true;
}
try {
$other = Activitypub_profile::from_profile($other);
} catch (Exception $e) {
return true; // Let other plugin handle this instead
}
$postman = new Activitypub_postman($profile, array($other));
$postman->undo_follow();
return true;
}
/**
* Notify remote users when their notices get favourited.
*
* @param Profile $profile of local user doing the faving
* @param Notice $notice Notice being favored
* @return bool return value
* @throws HTTP_Request2_Exception
* @throws InvalidUrlException
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function onEndFavorNotice(Profile $profile, Notice $notice)
{
// Only distribute local users' favor actions, remote users
// will have already distributed theirs.
if (!$profile->isLocal()) {
return true;
}
$other = [];
try {
$other[] = Activitypub_profile::from_profile($notice->getProfile());
} catch (Exception $e) {
// Local user can be ignored
}
$other = array_merge($other,
Activitypub_profile::from_profile_collection(
$notice->getAttentionProfiles()
));
if ($notice->reply_to) {
try {
$parent_notice = $notice->getParent();
try {
$other[] = Activitypub_profile::from_profile($parent_notice->getProfile());
} catch (Exception $e) {
// Local user can be ignored
}
$other = array_merge($other,
Activitypub_profile::from_profile_collection(
$parent_notice->getAttentionProfiles()
));
} catch (NoParentNoticeException $e) {
// This is not a reply to something (has no parent)
} catch (NoResultException $e) {
// Parent author's profile not found! Complain louder?
common_log(LOG_ERR, "Parent notice's author not found: ".$e->getMessage());
}
}
$postman = new Activitypub_postman($profile, $other);
$postman->like($notice);
return true;
}
/**
* Notify remote users when their notices get de-favourited.
*
* @param Profile $profile of local user doing the de-faving
* @param Notice $notice Notice being favored
* @return bool return value
* @throws HTTP_Request2_Exception
* @throws InvalidUrlException
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function onEndDisfavorNotice(Profile $profile, Notice $notice)
{
// Only distribute local users' favor actions, remote users
// will have already distributed theirs.
if (!$profile->isLocal()) {
return true;
}
$other = [];
try {
$other[] = Activitypub_profile::from_profile($notice->getProfile());
} catch (Exception $e) {
// Local user can be ignored
}
$other = array_merge($other,
Activitypub_profile::from_profile_collection(
$notice->getAttentionProfiles()
));
if ($notice->reply_to) {
try {
$parent_notice = $notice->getParent();
try {
$other[] = Activitypub_profile::from_profile($parent_notice->getProfile());
} catch (Exception $e) {
// Local user can be ignored
}
$other = array_merge($other,
Activitypub_profile::from_profile_collection(
$parent_notice->getAttentionProfiles()
));
} catch (NoParentNoticeException $e) {
// This is not a reply to something (has no parent)
} catch (NoResultException $e) {
// Parent author's profile not found! Complain louder?
common_log(LOG_ERR, "Parent notice's author not found: ".$e->getMessage());
}
}
$postman = new Activitypub_postman($profile, $other);
$postman->undo_like($notice);
return true;
}
/**
* Notify remote users when their notices get deleted
*
* @param $user
* @param $notice
* @return boolean hook flag
* @throws HTTP_Request2_Exception
* @throws InvalidUrlException
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function onStartDeleteOwnNotice($user, $notice)
{
$profile = $user->getProfile();
// Only distribute local users' delete actions, remote users
// will have already distributed theirs.
if (!$profile->isLocal()) {
return true;
}
// The deleting user must have permission to do so, but
// it still doesn't own the notitce, so we just need to
// handle things locally
if (!$notice->isLocal()) {
return true;
}
$other = Activitypub_profile::from_profile_collection(
$notice->getAttentionProfiles()
);
if ($notice->reply_to) {
try {
$parent_notice = $notice->getParent();
try {
$other[] = Activitypub_profile::from_profile($parent_notice->getProfile());
} catch (Exception $e) {
// Local user can be ignored
}
$other = array_merge($other,
Activitypub_profile::from_profile_collection(
$parent_notice->getAttentionProfiles()
));
} catch (NoParentNoticeException $e) {
// This is not a reply to something (has no parent)
} catch (NoResultException $e) {
// Parent author's profile not found! Complain louder?
common_log(LOG_ERR, "Parent notice's author not found: ".$e->getMessage());
}
}
$postman = new Activitypub_postman($profile, $other);
$postman->delete($notice);
return true;
}
/**
* Insert notifications for replies, mentions and repeats
*
* @param $notice
* @return boolean hook flag
* @throws EmptyPkeyValueException
* @throws HTTP_Request2_Exception
* @throws InvalidUrlException
* @throws ServerException
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function onStartNoticeDistribute($notice)
{
assert($notice->id > 0); // Ignore if not a valid notice
$profile = $notice->getProfile();
if (!$profile->isLocal()) {
return true;
}
// Ignore for activity/non-(post/share)-verb notices
if (method_exists('ActivityUtils', 'compareVerbs')) {
$is_valid_verb = ActivityUtils::compareVerbs($notice->verb,
[ActivityVerb::POST,
ActivityVerb::SHARE]);
} else {
$is_valid_verb = ($notice->verb == ActivityVerb::POST ||
$notice->verb == ActivityVerb::SHARE);
}
if ($notice->source == 'activity' || !$is_valid_verb) {
common_log(LOG_DEBUG, "Ignoring distribution of notice with id {$notice->id} due to invalid Verb");
return true;
}
$other = Activitypub_profile::from_profile_collection(
$notice->getAttentionProfiles()
);
// Is a reply?
if ($notice->reply_to) {
try {
$parent_notice = $notice->getParent();
try {
$other[] = Activitypub_profile::from_profile($parent_notice->getProfile());
} catch (Exception $e) {
// Local user can be ignored
}
foreach ($parent_notice->getAttentionProfiles() as $mention) {
try {
$other[] = Activitypub_profile::from_profile($mention);
} catch (Exception $e) {
// Local user can be ignored
}
}
} catch (NoParentNoticeException $e) {
// This is not a reply to something (has no parent)
} catch (NoResultException $e) {
// Parent author's profile not found! Complain louder?
common_log(LOG_ERR, "Parent notice's author not found: ".$e->getMessage());
}
}
// Is an Announce?
if ($notice->isRepeat()) {
$repeated_notice = Notice::getKV('id', $notice->repeat_of);
if ($repeated_notice instanceof Notice) {
$other = array_merge($other,
Activitypub_profile::from_profile_collection(
$repeated_notice->getAttentionProfiles()
));
try {
$other[] = Activitypub_profile::from_profile($repeated_notice->getProfile());
} catch (Exception $e) {
// Local user can be ignored
}
// That was it
$postman = new Activitypub_postman($profile, $other);
$postman->announce($repeated_notice);
}
// either made the announce or found nothing to repeat
return true;
}
// That was it
$postman = new Activitypub_postman($profile, $other);
$postman->create_note($notice);
return true;
}
/**
* Override the "from ActivityPub" bit in notice lists to link to the
* original post and show the domain it came from.
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param $notice
* @param $name
* @param $url
* @param $title
* @return mixed hook return code
* @throws Exception
*/
public function onStartNoticeSourceLink($notice, &$name, &$url, &$title)
{
// If we don't handle this, keep the event handler going
if (!in_array($notice->source, array('ActivityPub', 'share'))) {
return true;
}
try {
$url = $notice->getUrl();
// If getUrl() throws exception, $url is never set
$bits = parse_url($url);
$domain = $bits['host'];
if (substr($domain, 0, 4) == 'www.') {
$name = substr($domain, 4);
} else {
$name = $domain;
}
// TRANS: Title. %s is a domain name.
$title = sprintf(_m('Sent from %s via ActivityPub'), $domain);
// Abort event handler, we have a name and URL!
return false;
} catch (InvalidUrlException $e) {
// This just means we don't have the notice source data
return true;
}
}
}
/**
* Plugin return handler
*/
class ActivityPubReturn
{
/**
* Return a valid answer
*
* @param string $res
* @param int $code Status Code
* @return void
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public static function answer($res = '', $code = 202)
{
http_response_code($code);
header('Content-Type: application/activity+json');
echo json_encode($res, JSON_UNESCAPED_SLASHES | (isset($_GET["pretty"]) ? JSON_PRETTY_PRINT : null));
exit;
}
/**
* Return an error
*
* @param string $m
* @param int $code Status Code
* @return void
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public static function error($m, $code = 400)
{
http_response_code($code);
header('Content-Type: application/activity+json');
$res[] = Activitypub_error::error_message_to_array($m);
echo json_encode($res, JSON_UNESCAPED_SLASHES);
exit;
}
}