Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
/**
* @file src/Worker/Notifier.php
*/
namespace Friendica\Worker;
use Friendica\BaseObject;
use Friendica\Core\Addon;
use Friendica\Core\Config;
use Friendica\Core\Protocol;
use Friendica\Core\Worker;
use Friendica\Database\DBA;
use Friendica\Model\Contact;
use Friendica\Model\Group;
use Friendica\Model\Item;
use Friendica\Model\PushSubscriber;
use Friendica\Model\User;
use Friendica\Network\Probe;
use Friendica\Protocol\ActivityPub;
use Friendica\Protocol\Diaspora;
use Friendica\Protocol\OStatus;
use Friendica\Protocol\Salmon;
use Friendica\Model\Conversation;
require_once 'include/dba.php';
require_once 'include/items.php';
/*
* The notifier is typically called with:
*
* Worker::add(PRIORITY_HIGH, "Notifier", COMMAND, ITEM_ID);
*
* where COMMAND is one of the following:
*
* activity (in diaspora.php, dfrn_confirm.php, profiles.php)
* comment-import (in diaspora.php, items.php)
* comment-new (in item.php)
* drop (in diaspora.php, items.php, photos.php)
* edit_post (in item.php)
* event (in events.php)
* like (in like.php, poke.php)
* mail (in message.php)
* suggest (in fsuggest.php)
* tag (in photos.php, poke.php, tagger.php)
* tgroup (in items.php)
* wall-new (in photos.php, item.php)
* removeme (in Contact.php)
* relocate (in uimport.php)
*
* and ITEM_ID is the id of the item in the database that needs to be sent to others.
*/
class Notifier
{
public static function execute($cmd, $item_id)
{
$a = BaseObject::getApp();
logger('notifier: invoked: '.$cmd.': '.$item_id, LOGGER_DEBUG);
$top_level = false;
$recipients = [];
$url_recipients = [];
$normal_mode = true;
$recipients_relocate = [];
if ($cmd == Delivery::MAIL) {
$normal_mode = false;
$message = DBA::selectFirst('mail', ['uid', 'contact-id'], ['id' => $item_id]);
if (!DBA::isResult($message)) {
return;
}
$uid = $message['uid'];
$recipients[] = $message['contact-id'];
} elseif ($cmd == Delivery::SUGGESTION) {
$normal_mode = false;
$suggest = DBA::selectFirst('fsuggest', ['uid', 'cid'], ['id' => $item_id]);
if (!DBA::isResult($suggest)) {
return;
}
$uid = $suggest['uid'];
$recipients[] = $suggest['cid'];
} elseif ($cmd == Delivery::REMOVAL) {
$r = q("SELECT `contact`.*, `user`.`prvkey` AS `uprvkey`,
`user`.`timezone`, `user`.`nickname`, `user`.`sprvkey`, `user`.`spubkey`,
`user`.`page-flags`, `user`.`prvnets`, `user`.`account-type`, `user`.`guid`
FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
WHERE `contact`.`uid` = %d AND `contact`.`self` LIMIT 1",
intval($item_id));
if (!$r) {
return;
}
$user = $r[0];
$r = q("SELECT * FROM `contact` WHERE NOT `self` AND `uid` = %d", intval($item_id));
if (!$r) {
return;
}
foreach ($r as $contact) {
Contact::terminateFriendship($user, $contact, true);
}
$inboxes = ActivityPub\Transmitter::fetchTargetInboxesforUser(0);
foreach ($inboxes as $inbox) {
logger('Account removal for user ' . $item_id . ' to ' . $inbox .' via ActivityPub', LOGGER_DEBUG);
Worker::add(['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true],
'APDelivery', Delivery::REMOVAL, '', $inbox, $item_id);
}
return;
} elseif ($cmd == Delivery::RELOCATION) {
$normal_mode = false;
$uid = $item_id;
$recipients_relocate = q("SELECT * FROM `contact` WHERE `uid` = %d AND NOT `self` AND `network` IN ('%s', '%s')",
intval($uid), Protocol::DFRN, Protocol::DIASPORA);
} else {
// find ancestors
$condition = ['id' => $item_id, 'visible' => true, 'moderated' => false];
$target_item = Item::selectFirst([], $condition);
if (!DBA::isResult($target_item) || !intval($target_item['parent'])) {
return;
}
$parent_id = intval($target_item['parent']);
$uid = $target_item['contact-uid'];
$updated = $target_item['edited'];
$condition = ['parent' => $parent_id, 'visible' => true, 'moderated' => false];
$params = ['order' => ['id']];
$ret = Item::select([], $condition, $params);
if (!DBA::isResult($ret)) {
return;
}
$items = Item::inArray($ret);
// avoid race condition with deleting entries
if ($items[0]['deleted']) {
foreach ($items as $item) {
$item['deleted'] = 1;
}
}
if ((count($items) == 1) && ($items[0]['id'] === $target_item['id']) && ($items[0]['uri'] === $items[0]['parent-uri'])) {
logger('notifier: top level post');
$top_level = true;
}
}
$owner = User::getOwnerDataById($uid);
if (!$owner) {
return;
}
$walltowall = ($top_level && ($owner['id'] != $items[0]['contact-id']) ? true : false);
// Should the post be transmitted to Diaspora?
$diaspora_delivery = true;
// If this is a public conversation, notify the feed hub
$public_message = true;
// Do a PuSH
$push_notify = false;
// Deliver directly to a forum, don't PuSH
$direct_forum_delivery = false;
$followup = false;
$recipients_followup = [];
$conversants = [];
if (!in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION, Delivery::RELOCATION])) {
$parent = $items[0];
self::activityPubDelivery($a, $cmd, $item_id, $uid, $target_item, $parent);
$fields = ['network', 'author-id', 'owner-id'];
$condition = ['uri' => $target_item["thr-parent"], 'uid' => $target_item["uid"]];
$thr_parent = Item::selectFirst($fields, $condition);
logger('GUID: '.$target_item["guid"].': Parent is '.$parent['network'].'. Thread parent is '.$thr_parent['network'], LOGGER_DEBUG);
// This is IMPORTANT!!!!
// We will only send a "notify owner to relay" or followup message if the referenced post
// originated on our system by virtue of having our hostname somewhere
// in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
// if $parent['wall'] == 1 we will already have the parent message in our array
// and we will relay the whole lot.
$localhost = str_replace('www.','',$a->getHostName());
if (strpos($localhost,':')) {
$localhost = substr($localhost,0,strpos($localhost,':'));
}
/**
*
* Be VERY CAREFUL if you make any changes to the following several lines. Seemingly innocuous changes
* have been known to cause runaway conditions which affected several servers, along with
* permissions issues.
*
*/
$relay_to_owner = false;
if (!$top_level && ($parent['wall'] == 0) && (stristr($target_item['uri'],$localhost))) {
$relay_to_owner = true;
}
if (($cmd === 'uplink') && (intval($parent['forum_mode']) == 1) && !$top_level) {
$relay_to_owner = true;
}
// until the 'origin' flag has been in use for several months
// we will just use it as a fallback test
// later we will be able to use it as the primary test of whether or not to relay.
if (!$target_item['origin']) {
$relay_to_owner = false;
}
if ($parent['origin']) {
$relay_to_owner = false;
}
// Special treatment for forum posts
if (self::isForumPost($target_item, $owner)) {
$relay_to_owner = true;
$direct_forum_delivery = true;
}
// Avoid that comments in a forum thread are sent to OStatus
if (self::isForumPost($parent, $owner)) {
$direct_forum_delivery = true;
}
if ($relay_to_owner) {
// local followup to remote post
$followup = true;
$public_message = false; // not public
$conversant_str = DBA::escape($parent['contact-id']);
$recipients = [$parent['contact-id']];
$recipients_followup = [$parent['contact-id']];
logger('notifier: followup '.$target_item["guid"].' to '.$conversant_str, LOGGER_DEBUG);
//if (!$target_item['private'] && $target_item['wall'] &&
if (!$target_item['private'] &&
(strlen($target_item['allow_cid'].$target_item['allow_gid'].
$target_item['deny_cid'].$target_item['deny_gid']) == 0))
$push_notify = true;
if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
$push_notify = true;
if ($parent["network"] == Protocol::OSTATUS) {
// Distribute the message to the DFRN contacts as if this wasn't a followup since OStatus can't relay comments
// Currently it is work at progress
$r = q("SELECT `id` FROM `contact` WHERE `uid` = %d AND `network` = '%s' AND NOT `blocked` AND NOT `pending` AND NOT `archive`",
intval($uid),
DBA::escape(Protocol::DFRN)
);
if (DBA::isResult($r)) {
foreach ($r as $rr) {
$recipients_followup[] = $rr['id'];
}
}
}
}
if ($direct_forum_delivery) {
$push_notify = false;
}
logger("Notify ".$target_item["guid"]." via PuSH: ".($push_notify?"Yes":"No"), LOGGER_DEBUG);
} else {
$followup = false;
logger('Distributing directly '.$target_item["guid"], LOGGER_DEBUG);
// don't send deletions onward for other people's stuff
if ($target_item['deleted'] && !intval($target_item['wall'])) {
logger('notifier: ignoring delete notification for non-wall item');
return;
}
if (strlen($parent['allow_cid'])
|| strlen($parent['allow_gid'])
|| strlen($parent['deny_cid'])
|| strlen($parent['deny_gid'])) {
$public_message = false; // private recipients, not public
}
$allow_people = expand_acl($parent['allow_cid']);
$allow_groups = Group::expand(expand_acl($parent['allow_gid']),true);
$deny_people = expand_acl($parent['deny_cid']);
$deny_groups = Group::expand(expand_acl($parent['deny_gid']));
// if our parent is a public forum (forum_mode == 1), uplink to the origional author causing
// a delivery fork. private groups (forum_mode == 2) do not uplink
if ((intval($parent['forum_mode']) == 1) && !$top_level && ($cmd !== 'uplink')) {
Worker::add($a->queue['priority'], 'Notifier', 'uplink', $item_id);
}
foreach ($items as $item) {
$recipients[] = $item['contact-id'];
$conversants[] = $item['contact-id'];
// pull out additional tagged people to notify (if public message)
if ($public_message && strlen($item['inform'])) {
$people = explode(',',$item['inform']);
foreach ($people as $person) {
if (substr($person,0,4) === 'cid:') {
$recipients[] = intval(substr($person,4));
$conversants[] = intval(substr($person,4));
} else {
$url_recipients[] = substr($person,4);
}
}
}
}
if (count($url_recipients)) {
logger('notifier: '.$target_item["guid"].' url_recipients ' . print_r($url_recipients,true));
}
$conversants = array_unique($conversants);
$recipients = array_unique(array_merge($recipients,$allow_people,$allow_groups));
$deny = array_unique(array_merge($deny_people,$deny_groups));
$recipients = array_diff($recipients,$deny);
$conversant_str = DBA::escape(implode(', ',$conversants));
}
// If the thread parent is OStatus then do some magic to distribute the messages.
// We have not only to look at the parent, since it could be a Friendica thread.
if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
$diaspora_delivery = false;
logger('Some parent is OStatus for '.$target_item["guid"]." - Author: ".$thr_parent['author-id']." - Owner: ".$thr_parent['owner-id'], LOGGER_DEBUG);
// Send a salmon to the parent author
$probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['author-id']]);
if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
logger('Notify parent author '.$probed_contact["url"].': '.$probed_contact["notify"]);
$url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
}
// Send a salmon to the parent owner
$probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['owner-id']]);
if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
logger('Notify parent owner '.$probed_contact["url"].': '.$probed_contact["notify"]);
$url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
}
// Send a salmon notification to every person we mentioned in the post
$arr = explode(',',$target_item['tag']);
foreach ($arr as $x) {
//logger('Checking tag '.$x, LOGGER_DEBUG);
$matches = null;
if (preg_match('/@\[url=([^\]]*)\]/',$x,$matches)) {
$probed_contact = Probe::uri($matches[1]);
if ($probed_contact["notify"] != "") {
logger('Notify mentioned user '.$probed_contact["url"].': '.$probed_contact["notify"]);
$url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
}
}
}
// It only makes sense to distribute answers to OStatus messages to Friendica and OStatus - but not Diaspora
$networks = [Protocol::OSTATUS, Protocol::DFRN];
} else {
$networks = [Protocol::OSTATUS, Protocol::DFRN, Protocol::DIASPORA, Protocol::MAIL];
}
} else {
$public_message = false;
}
// If this is a public message and pubmail is set on the parent, include all your email contacts
if (!empty($target_item) && function_exists('imap_open') && !Config::get('system','imap_disabled')) {
if (!strlen($target_item['allow_cid']) && !strlen($target_item['allow_gid'])
&& !strlen($target_item['deny_cid']) && !strlen($target_item['deny_gid'])
&& intval($target_item['pubmail'])) {
$r = q("SELECT `id` FROM `contact` WHERE `uid` = %d AND `network` = '%s'",
intval($uid),
DBA::escape(Protocol::MAIL)
);
if (DBA::isResult($r)) {
foreach ($r as $rr) {
$recipients[] = $rr['id'];
}
}
}
}
if (($cmd == Delivery::RELOCATION)) {
$r = $recipients_relocate;
} else {
if ($followup) {
$recipients = $recipients_followup;
}
$condition = ['id' => $recipients, 'self' => false,
'blocked' => false, 'pending' => false, 'archive' => false];
if (!empty($networks)) {
$condition['network'] = $networks;
}
$contacts = DBA::select('contact', ['id', 'url', 'network'], $condition);
$r = DBA::toArray($contacts);
}
// delivery loop
if (DBA::isResult($r)) {
foreach ($r as $contact) {
logger("Deliver ".$item_id." to ".$contact['url']." via network ".$contact['network'], LOGGER_DEBUG);
Worker::add(['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true],
'Delivery', $cmd, $item_id, (int)$contact['id']);
}
}
// send salmon slaps to mentioned remote tags (@foo@example.com) in OStatus posts
// They are especially used for notifications to OStatus users that don't follow us.
if (!Config::get('system', 'dfrn_only') && count($url_recipients) && ($public_message || $push_notify) && $normal_mode) {
$slap = OStatus::salmon($target_item, $owner);
foreach ($url_recipients as $url) {
if ($url) {
logger('notifier: urldelivery: ' . $url);
$deliver_status = Salmon::slapper($owner, $url, $slap);
/// @TODO Redeliver/queue these items on failure, though there is no contact record
}
}
}
if ($public_message) {
$r1 = [];
if ($diaspora_delivery) {
$r1 = q("SELECT `batch`, ANY_VALUE(`id`) AS `id`, ANY_VALUE(`name`) AS `name`, ANY_VALUE(`network`) AS `network`
FROM `contact` WHERE `network` = '%s' AND `batch` != ''
AND `uid` = %d AND `rel` != %d AND NOT `blocked` AND NOT `pending` AND NOT `archive` GROUP BY `batch`",
DBA::escape(Protocol::DIASPORA),
intval($owner['uid']),
intval(Contact::SHARING)
);
// Fetch the participation list
// The function will ensure that there are no duplicates
$r1 = Diaspora::participantsForThread($item_id, $r1);
// Add the relay to the list, avoid duplicates
if (!$followup) {
$r1 = Diaspora::relayList($item_id, $r1);
}
}
$condition = ['network' => Protocol::DFRN, 'uid' => $owner['uid'], 'blocked' => false,
'pending' => false, 'archive' => false, 'rel' => [Contact::FOLLOWER, Contact::FRIEND]];
$r2 = DBA::toArray(DBA::select('contact', ['id', 'name', 'network'], $condition));
$r = array_merge($r2, $r1);
if (DBA::isResult($r)) {
logger('pubdeliver '.$target_item["guid"].': '.print_r($r,true), LOGGER_DEBUG);
foreach ($r as $rr) {
// except for Diaspora batch jobs
// Don't deliver to folks who have already been delivered to
if (($rr['network'] !== Protocol::DIASPORA) && (in_array($rr['id'], $conversants))) {
logger('notifier: already delivered id=' . $rr['id']);
continue;
}
if (!in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION]) && !$followup) {
logger('notifier: delivery agent: '.$rr['name'].' '.$rr['id'].' '.$rr['network'].' '.$target_item["guid"]);
Worker::add(['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true],
'Delivery', $cmd, $item_id, (int)$rr['id']);
}
}
}
$push_notify = true;
}
// Notify PuSH subscribers (Used for OStatus distribution of regular posts)
if ($push_notify) {
logger('Activating internal PuSH for item '.$item_id, LOGGER_DEBUG);
// Handling the pubsubhubbub requests
PushSubscriber::publishFeed($owner['uid'], $a->queue['priority']);
}
logger('notifier: calling hooks for ' . $cmd . ' ' . $item_id, LOGGER_DEBUG);
if ($normal_mode) {
Addon::forkHooks($a->queue['priority'], 'notifier_normal', $target_item);
}
Addon::callHooks('notifier_end',$target_item);
return;
}
private static function activityPubDelivery($a, $cmd, $item_id, $uid, $target_item, $parent)
{
$inboxes = [];
$personal = false;
if ($target_item['origin']) {
$inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid);
logger('Origin item ' . $item_id . ' with URL ' . $target_item['uri'] . ' will be distributed.', LOGGER_DEBUG);
} elseif (!DBA::exists('conversation', ['item-uri' => $target_item['uri'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB])) {
logger('Remote item ' . $item_id . ' with URL ' . $target_item['uri'] . ' is no AP post. It will not be distributed.', LOGGER_DEBUG);
return;
} else {
// Remote items are transmitted via the personal inboxes.
// Doing so ensures that the dedicated receiver will get the message.
$personal = true;
logger('Remote item ' . $item_id . ' with URL ' . $target_item['uri'] . ' will be distributed.', LOGGER_DEBUG);
}
if ($parent['origin']) {
$parent_inboxes = ActivityPub\Transmitter::fetchTargetInboxes($parent, $uid, $personal);
$inboxes = array_merge($inboxes, $parent_inboxes);
}
if (empty($inboxes)) {
logger('No inboxes found for item ' . $item_id . ' with URL ' . $target_item['uri'] . '. It will not be distributed.', LOGGER_DEBUG);
return;
}
// Fill the item cache
ActivityPub\Transmitter::createCachedActivityFromItem($item_id);
foreach ($inboxes as $inbox) {
logger('Deliver ' . $item_id .' to ' . $inbox .' via ActivityPub', LOGGER_DEBUG);
Worker::add(['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true],
'APDelivery', $cmd, $item_id, $inbox, $uid);
}
}
private static function isForumPost($item, $owner) {
if (($item['author-id'] == $item['owner-id']) ||
($owner['id'] == $item['contact-id']) ||
($item['uri'] != $item['parent-uri'])) {
return false;
}
$fields = ['forum', 'prv'];
$condition = ['id' => $item['contact-id']];
$contact = DBA::selectFirst('contact', $fields, $condition);
if (!DBA::isResult($contact)) {
// Should never happen
return false;
}
// Is the post from a forum?
return ($contact['forum'] || $contact['prv']);
}
}