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friendica/src/Worker/Notifier.php

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<?php
/**
* @file src/Worker/Notifier.php
*/
namespace Friendica\Worker;
use Friendica\Core\Addon;
use Friendica\Core\Config;
use Friendica\Core\Worker;
use Friendica\Database\DBM;
use Friendica\Model\Contact;
use Friendica\Model\Group;
use Friendica\Model\User;
use Friendica\Network\Probe;
use Friendica\Protocol\Diaspora;
use Friendica\Protocol\OStatus;
use Friendica\Protocol\Salmon;
use dba;
require_once 'include/dba.php';
require_once 'include/items.php';
/*
* This file was at one time responsible for doing all deliveries, but this caused
* big problems when the process was killed or stalled during the delivery process.
* It now invokes separate queues that are delivering via delivery.php and pubsubpublish.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) {
global $a;
logger('notifier: invoked: '.$cmd.': '.$item_id, LOGGER_DEBUG);
$mail = false;
$fsuggest = false;
$relocate = false;
$top_level = false;
$recipients = [];
$url_recipients = [];
$normal_mode = true;
$recipients_relocate = [];
if ($cmd === 'mail') {
$normal_mode = false;
$mail = true;
$message = q("SELECT * FROM `mail` WHERE `id` = %d LIMIT 1",
intval($item_id)
);
if (!count($message)) {
return;
}
$uid = $message[0]['uid'];
$recipients[] = $message[0]['contact-id'];
$item = $message[0];
} elseif ($cmd === 'suggest') {
$normal_mode = false;
$fsuggest = true;
$suggest = q("SELECT * FROM `fsuggest` WHERE `id` = %d LIMIT 1",
intval($item_id)
);
if (!count($suggest)) {
return;
}
$uid = $suggest[0]['uid'];
$recipients[] = $suggest[0]['cid'];
$item = $suggest[0];
} elseif ($cmd === 'removeme') {
$r = q("SELECT `contact`.*, `user`.`prvkey` AS `uprvkey`,
`user`.`timezone`, `user`.`nickname`, `user`.`sprvkey`, `user`.`spubkey`,
`user`.`page-flags`, `user`.`prvnets`, `user`.`account-type`, `user`.`guid`
FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
WHERE `contact`.`uid` = %d AND `contact`.`self` LIMIT 1",
intval($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, $contact);
}
return;
} elseif ($cmd === 'relocate') {
$normal_mode = false;
$relocate = true;
$uid = $item_id;
$recipients_relocate = q("SELECT * FROM `contact` WHERE `uid` = %d AND NOT `self` AND `network` IN ('%s', '%s')",
intval($uid), NETWORK_DFRN, NETWORK_DIASPORA);
} else {
// find ancestors
$target_item = dba::fetch_first("SELECT `item`.*, `contact`.`uid` AS `cuid` FROM `item`
INNER JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
WHERE `item`.`id` = ? AND `visible` AND NOT `moderated`", $item_id);
if (!DBM::is_result($target_item) || !intval($target_item['parent'])) {
return;
}
$parent_id = intval($target_item['parent']);
$uid = $target_item['cuid'];
$updated = $target_item['edited'];
$items = q("SELECT `item`.*, `sign`.`signed_text`,`sign`.`signature`,`sign`.`signer`
FROM `item` LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id` WHERE `parent` = %d AND visible AND NOT moderated ORDER BY `id` ASC",
intval($parent_id)
);
if (!count($items)) {
return;
}
// avoid race condition with deleting entries
if ($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;
// fill this in with a single salmon slap if applicable
$slap = '';
$followup = false;
$recipients_followup = [];
$conversants = [];
$sql_extra = '';
if (! ($mail || $fsuggest || $relocate)) {
$slap = OStatus::salmon($target_item, $owner);
$parent = $items[0];
$thr_parent = q("SELECT `network`, `author-link`, `owner-link` FROM `item` WHERE `uri` = '%s' AND `uid` = %d",
dbesc($target_item["thr-parent"]), intval($target_item["uid"]));
logger('GUID: '.$target_item["guid"].': Parent is '.$parent['network'].'. Thread parent is '.$thr_parent[0]['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->get_hostname());
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']) {
$relay_to_owner = false;
}
// Special treatment for forum posts
if (($target_item['author-link'] != $target_item['owner-link']) &&
($owner['id'] != $target_item['contact-id']) &&
($target_item['uri'] === $target_item['parent-uri'])) {
$fields = ['forum', 'prv'];
$condition = ['id' => $target_item['contact-id']];
$contact = dba::selectFirst('contact', $fields, $condition);
if (!DBM::is_result($contact)) {
// Should never happen
return false;
}
// Is the post from a forum?
if ($contact['forum'] || $contact['prv']) {
$relay_to_owner = true;
$direct_forum_delivery = true;
}
}
if ($relay_to_owner) {
// local followup to remote post
$followup = true;
$public_message = false; // not public
$conversant_str = dbesc($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 && ($thr_parent[0]['network'] == NETWORK_OSTATUS)) || ($parent['network'] == NETWORK_OSTATUS)) {
$push_notify = true;
if ($parent["network"] == NETWORK_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),
dbesc(NETWORK_DFRN)
);
if (DBM::is_result($r)) {
foreach ($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);
$conversant_str = dbesc(implode(', ',$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[0]['network'] == NETWORK_OSTATUS)) || ($parent['network'] == NETWORK_OSTATUS)) {
$diaspora_delivery = false;
logger('Some parent is OStatus for '.$target_item["guid"]." - Author: ".$thr_parent[0]['author-link']." - Owner: ".$thr_parent[0]['owner-link'], LOGGER_DEBUG);
// Send a salmon to the parent author
$r = q("SELECT `url`, `notify` FROM `contact` WHERE `nurl`='%s' AND `uid` IN (0, %d) AND `notify` != ''",
dbesc(normalise_link($thr_parent[0]['author-link'])),
intval($uid));
if (DBM::is_result($r)) {
$probed_contact = $r[0];
} else {
$probed_contact = Probe::uri($thr_parent[0]['author-link']);
}
if ($probed_contact["notify"] != "") {
logger('Notify parent author '.$probed_contact["url"].': '.$probed_contact["notify"]);
$url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
}
// Send a salmon to the parent owner
$r = q("SELECT `url`, `notify` FROM `contact` WHERE `nurl`='%s' AND `uid` IN (0, %d) AND `notify` != ''",
dbesc(normalise_link($thr_parent[0]['owner-link'])),
intval($uid));
if (DBM::is_result($r)) {
$probed_contact = $r[0];
} else {
$probed_contact = Probe::uri($thr_parent[0]['owner-link']);
}
if ($probed_contact["notify"] != "") {
logger('Notify parent owner '.$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
$sql_extra = " AND `network` IN ('".NETWORK_OSTATUS."', '".NETWORK_DFRN."')";
} else {
$sql_extra = " AND `network` IN ('".NETWORK_OSTATUS."', '".NETWORK_DFRN."', '".NETWORK_DIASPORA."', '".NETWORK_MAIL."')";
}
} else {
$public_message = false;
}
// If this is a public message and pubmail is set on the parent, include all your email contacts
$mail_disabled = ((function_exists('imap_open') && (!Config::get('system','imap_disabled'))) ? 0 : 1);
if (!$mail_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),
dbesc(NETWORK_MAIL)
);
if (DBM::is_result($r)) {
foreach ($r as $rr) {
$recipients[] = $rr['id'];
}
}
}
}
if ($followup) {
$recip_str = implode(', ', $recipients_followup);
} else {
$recip_str = implode(', ', $recipients);
}
if ($relocate) {
$r = $recipients_relocate;
} else {
$r = q("SELECT `id`, `url`, `network`, `self` FROM `contact`
WHERE `id` IN (%s) AND NOT `blocked` AND NOT `pending` AND NOT `archive`".$sql_extra,
dbesc($recip_str)
);
}
// delivery loop
if (DBM::is_result($r)) {
foreach ($r as $contact) {
if ($contact['self']) {
continue;
}
logger("Deliver ".$target_item["guid"]." to ".$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 ($slap && count($url_recipients) && ($public_message || $push_notify) && $normal_mode) {
if (!Config::get('system', 'dfrn_only')) {
foreach ($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) {
$r0 = [];
$r1 = [];
if ($diaspora_delivery) {
if (!$followup) {
$r0 = Diaspora::relayList($item_id);
}
$r1 = q("SELECT `batch`, ANY_VALUE(`id`) AS `id`, ANY_VALUE(`name`) AS `name`, ANY_VALUE(`network`) AS `network`
FROM `contact` WHERE `network` = '%s' AND `batch` != ''
AND `uid` = %d AND `rel` != %d AND NOT `blocked` AND NOT `pending` AND NOT `archive` GROUP BY `batch`",
dbesc(NETWORK_DIASPORA),
intval($owner['uid']),
intval(CONTACT_IS_SHARING)
);
// Fetch the participation list
// The function will ensure that there are no duplicates
$r1 = Diaspora::participantsForThread($item_id, $r1);
}
$r2 = q("SELECT `id`, `name`,`network` FROM `contact`
WHERE `network` in ('%s') AND `uid` = %d AND NOT `blocked` AND NOT `pending` AND NOT `archive` AND `rel` != %d",
dbesc(NETWORK_DFRN),
intval($owner['uid']),
intval(CONTACT_IS_SHARING)
);
$r = array_merge($r2, $r1, $r0);
if (DBM::is_result($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'] !== NETWORK_DIASPORA) && (in_array($rr['id'], $conversants))) {
logger('notifier: already delivered id=' . $rr['id']);
continue;
}
if (!$mail && !$fsuggest && !$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) {
// Set push flag for PuSH subscribers to this topic,
// they will be notified in queue.php
$condition = ['push' => false, 'nickname' => $owner['nickname']];
dba::update('push_subscriber', ['push' => true], $condition);
logger('Activating internal PuSH for item '.$item_id, LOGGER_DEBUG);
// Handling the pubsubhubbub requests
Worker::add(['priority' => PRIORITY_HIGH, 'created' => $a->queue['created'], 'dont_fork' => true],
'PubSubPublish');
}
logger('notifier: calling hooks', LOGGER_DEBUG);
if ($normal_mode) {
Addon::forkHooks($a->queue['priority'], 'notifier_normal', $target_item);
}
Addon::callHooks('notifier_end',$target_item);
return;
}
}
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