friendica_2021-01/include/notifier.php

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<?php
use Friendica\App;
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use Friendica\Core\Config;
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require_once 'include/queue_fn.php';
require_once 'include/html2plain.php';
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require_once 'include/probe.php';
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require_once 'include/diaspora.php';
require_once 'include/ostatus.php';
require_once 'include/salmon.php';
/*
* This file was at one time responsible for doing all deliveries, but this caused
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* 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:
*
* proc_run(PRIORITY_HIGH, "include/notifier.php", 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)
* expire (in items.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.
*/
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function notifier_run(&$argv, &$argc){
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global $a;
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require_once 'include/datetime.php';
require_once 'include/items.php';
require_once 'include/bbcode.php';
require_once 'include/email.php';
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if ($argc < 3) {
return;
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}
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// Inherit the priority
$queue = dba::select('workerqueue', array('priority'), array('pid' => getmypid()), array('limit' => 1));
if (dbm::is_result($queue)) {
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$priority = (int)$queue['priority'];
logger('inherited priority: '.$priority);
} else {
// Normally this shouldn't happen.
$priority = PRIORITY_HIGH;
logger('no inherited priority! Something is wrong.');
}
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logger('notifier: invoked: ' . print_r($argv,true), LOGGER_DEBUG);
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$cmd = $argv[1];
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switch($cmd) {
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case 'mail':
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default:
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$item_id = intval($argv[2]);
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if (! $item_id) {
return;
}
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break;
}
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$expire = false;
$mail = false;
$fsuggest = false;
$relocate = false;
$top_level = false;
$recipients = array();
$url_recipients = array();
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$normal_mode = true;
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if ($cmd === 'mail') {
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$normal_mode = false;
$mail = true;
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$message = q("SELECT * FROM `mail` WHERE `id` = %d LIMIT 1",
intval($item_id)
);
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if (! count($message)) {
return;
}
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$uid = $message[0]['uid'];
$recipients[] = $message[0]['contact-id'];
$item = $message[0];
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} elseif ($cmd === 'expire') {
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$normal_mode = false;
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$expire = true;
$items = q("SELECT * FROM `item` WHERE `uid` = %d AND `wall` = 1
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AND `deleted` = 1 AND `changed` > UTC_TIMESTAMP() - INTERVAL 10 MINUTE",
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intval($item_id)
);
$uid = $item_id;
$item_id = 0;
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if (! count($items)) {
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return;
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}
} elseif ($cmd === 'suggest') {
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$normal_mode = false;
$fsuggest = true;
$suggest = q("SELECT * FROM `fsuggest` WHERE `id` = %d LIMIT 1",
intval($item_id)
);
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if (! count($suggest)) {
return;
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}
$uid = $suggest[0]['uid'];
$recipients[] = $suggest[0]['cid'];
$item = $suggest[0];
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} elseif ($cmd === 'removeme') {
$r = q("SELECT `contact`.*, `user`.`pubkey` AS `upubkey`, `user`.`prvkey` AS `uprvkey`,
`user`.`timezone`, `user`.`nickname`, `user`.`sprvkey`, `user`.`spubkey`,
`user`.`page-flags`, `user`.`prvnets`, `user`.`account-type`, `user`.`guid`
FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
WHERE `contact`.`uid` = %d AND `contact`.`self` LIMIT 1",
intval($item_id));
if (!$r)
return;
$user = $r[0];
$r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `self` LIMIT 1", intval($item_id));
if (!$r)
return;
$self = $r[0];
$r = q("SELECT * FROM `contact` WHERE NOT `self` AND `uid` = %d", intval($item_id));
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if (!$r) {
return;
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}
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require_once 'include/Contact.php';
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foreach ($r as $contact) {
terminate_friendship($user, $self, $contact);
}
return;
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} elseif ($cmd === 'relocate') {
$normal_mode = false;
$relocate = true;
$uid = $item_id;
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$recipients_relocate = q("SELECT * FROM contact WHERE uid = %d AND self = 0 AND network = '%s'" , intval($uid), NETWORK_DFRN);
} else {
// find ancestors
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$r = q("SELECT * FROM `item` WHERE `id` = %d and visible = 1 and moderated = 0 LIMIT 1",
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intval($item_id)
);
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if ((! dbm::is_result($r)) || (! intval($r[0]['parent']))) {
return;
}
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$target_item = $r[0];
$parent_id = intval($r[0]['parent']);
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$uid = $r[0]['uid'];
$updated = $r[0]['edited'];
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$items = q("SELECT `item`.*, `sign`.`signed_text`,`sign`.`signature`,`sign`.`signer`
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FROM `item` LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id` WHERE `parent` = %d and visible = 1 and moderated = 0 ORDER BY `id` ASC",
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intval($parent_id)
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);
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if (! count($items)) {
return;
}
// avoid race condition with deleting entries
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if ($items[0]['deleted']) {
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foreach ($items as $item) {
$item['deleted'] = 1;
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}
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}
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if ((count($items) == 1) && ($items[0]['id'] === $target_item['id']) && ($items[0]['uri'] === $items[0]['parent-uri'])) {
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logger('notifier: top level post');
$top_level = true;
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}
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}
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$r = q("SELECT `contact`.*, `user`.`pubkey` AS `upubkey`, `user`.`prvkey` AS `uprvkey`,
`user`.`timezone`, `user`.`nickname`, `user`.`sprvkey`, `user`.`spubkey`,
`user`.`page-flags`, `user`.`prvnets`, `user`.`account-type`
FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
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WHERE `contact`.`uid` = %d AND `contact`.`self` = 1 LIMIT 1",
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intval($uid)
);
if (! dbm::is_result($r)) {
return;
}
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$owner = $r[0];
$walltowall = ((($top_level) && ($owner['id'] != $items[0]['contact-id'])) ? true : false);
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$hub = get_config('system','huburl');
// Should the post be transmitted to Diaspora?
$diaspora_delivery = true;
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// If this is a public conversation, notify the feed hub
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$public_message = true;
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// Do a PuSH
$push_notify = false;
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// fill this in with a single salmon slap if applicable
$slap = '';
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if (! ($mail || $fsuggest || $relocate)) {
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$slap = ostatus::salmon($target_item,$owner);
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require_once 'include/group.php';
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$parent = $items[0];
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$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 $parent['wall'] == 1 we will already have the parent message in our array
// and we will relay the whole lot.
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// expire sends an entire group of expire messages and cannot be forwarded.
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// However the conversation owner will be a part of the conversation and will
// be notified during this run.
// Other DFRN conversation members will be alerted during polled updates.
// Diaspora members currently are not notified of expirations, and other networks have
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// either limited or no ability to process deletions. We should at least fix Diaspora
// by stringing togther an array of retractions and sending them onward.
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$localhost = str_replace('www.','',$a->get_hostname());
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if (strpos($localhost,':')) {
$localhost = substr($localhost,0,strpos($localhost,':'));
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}
/**
*
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* Be VERY CAREFUL if you make any changes to the following several lines. Seemingly innocuous changes
* have been known to cause runaway conditions which affected several servers, along with
* permissions issues.
*
*/
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$relay_to_owner = false;
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if (!$top_level && ($parent['wall'] == 0) && !$expire && (stristr($target_item['uri'],$localhost))) {
$relay_to_owner = true;
}
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if (($cmd === 'uplink') && (intval($parent['forum_mode']) == 1) && !$top_level) {
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$relay_to_owner = true;
}
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// 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.
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if (! $target_item['origin']) {
$relay_to_owner = false;
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}
if ($parent['origin']) {
$relay_to_owner = false;
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}
if ($relay_to_owner) {
logger('notifier: followup '.$target_item["guid"], LOGGER_DEBUG);
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// local followup to remote post
$followup = true;
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$public_message = false; // not public
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$conversant_str = dbesc($parent['contact-id']);
$recipients = array($parent['contact-id']);
$recipients_followup = array($parent['contact-id']);
//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
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// 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)
);
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if (dbm::is_result($r)) {
foreach ($r as $rr) {
$recipients_followup[] = $rr['id'];
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}
}
}
}
logger("Notify ".$target_item["guid"]." via PuSH: ".($push_notify?"Yes":"No"), LOGGER_DEBUG);
} else {
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$followup = false;
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logger('Distributing directly '.$target_item["guid"], LOGGER_DEBUG);
// don't send deletions onward for other people's stuff
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if ($target_item['deleted'] && (! intval($target_item['wall']))) {
logger('notifier: ignoring delete notification for non-wall item');
return;
}
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if ((strlen($parent['allow_cid']))
|| (strlen($parent['allow_gid']))
|| (strlen($parent['deny_cid']))
|| (strlen($parent['deny_gid']))) {
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$public_message = false; // private recipients, not public
}
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$allow_people = expand_acl($parent['allow_cid']);
$allow_groups = expand_groups(expand_acl($parent['allow_gid']),true);
$deny_people = expand_acl($parent['deny_cid']);
$deny_groups = expand_groups(expand_acl($parent['deny_gid']));
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// 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
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if ((intval($parent['forum_mode']) == 1) && (! $top_level) && ($cmd !== 'uplink')) {
proc_run($priority, 'include/notifier.php', 'uplink', $item_id);
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}
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$conversants = array();
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foreach ($items as $item) {
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$recipients[] = $item['contact-id'];
$conversants[] = $item['contact-id'];
// pull out additional tagged people to notify (if public message)
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if ($public_message && strlen($item['inform'])) {
$people = explode(',',$item['inform']);
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foreach ($people as $person) {
if (substr($person,0,4) === 'cid:') {
$recipients[] = intval(substr($person,4));
$conversants[] = intval(substr($person,4));
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} else {
$url_recipients[] = substr($person,4);
}
}
}
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}
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if (count($url_recipients))
logger('notifier: '.$target_item["guid"].' url_recipients ' . print_r($url_recipients,true));
$conversants = array_unique($conversants);
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$recipients = array_unique(array_merge($recipients,$allow_people,$allow_groups));
$deny = array_unique(array_merge($deny_people,$deny_groups));
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$recipients = array_diff($recipients,$deny);
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$conversant_str = dbesc(implode(', ',$conversants));
}
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// 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
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$r = q("SELECT `url`, `notify` FROM `contact` WHERE `nurl`='%s' AND `uid` IN (0, %d) AND `notify` != ''",
dbesc(normalise_link($thr_parent[0]['author-link'])),
intval($uid));
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if (dbm::is_result($r)) {
$probed_contact = $r[0];
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} else {
$probed_contact = probe_url($thr_parent[0]['author-link']);
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}
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($uid));
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if (dbm::is_result($r)) {
$probed_contact = $r[0];
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} else {
$probed_contact = probe_url($thr_parent[0]['owner-link']);
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}
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']);
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foreach ($arr as $x) {
//logger('Checking tag '.$x, LOGGER_DEBUG);
$matches = null;
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if (preg_match('/@\[url=([^\]]*)\]/',$x,$matches)) {
$probed_contact = probe_url($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
$sql_extra = " AND `network` IN ('".NETWORK_OSTATUS."', '".NETWORK_DFRN."')";
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} else {
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$sql_extra = " AND `network` IN ('".NETWORK_OSTATUS."', '".NETWORK_DFRN."', '".NETWORK_DIASPORA."', '".NETWORK_MAIL."', '".NETWORK_MAIL2."')";
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}
} else {
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$public_message = false;
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}
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// If this is a public message and pubmail is set on the parent, include all your email contacts
$mail_disabled = ((function_exists('imap_open') && (! get_config('system','imap_disabled'))) ? 0 : 1);
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if (! $mail_disabled) {
if ((! strlen($target_item['allow_cid'])) && (! strlen($target_item['allow_gid']))
&& (! strlen($target_item['deny_cid'])) && (! strlen($target_item['deny_gid']))
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&& (intval($target_item['pubmail']))) {
$r = q("SELECT `id` FROM `contact` WHERE `uid` = %d AND `network` = '%s'",
intval($uid),
dbesc(NETWORK_MAIL)
);
if (dbm::is_result($r)) {
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foreach ($r as $rr) {
$recipients[] = $rr['id'];
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}
}
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}
}
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if ($followup) {
$recip_str = implode(', ', $recipients_followup);
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} else {
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$recip_str = implode(', ', $recipients);
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}
if ($relocate) {
$r = $recipients_relocate;
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} 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($recip_str)
);
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}
// delivery loop
if (dbm::is_result($r)) {
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foreach ($r as $contact) {
if ($contact['self']) {
continue;
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}
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logger("Deliver ".$target_item["guid"]." to ".$contact['url']." via network ".$contact['network'], LOGGER_DEBUG);
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proc_run(array('priority' => $priority, 'dont_fork' => true), 'include/delivery.php', $cmd, $item_id, $contact['id']);
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}
}
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// send salmon slaps to mentioned remote tags (@foo@example.com) in OStatus posts
// They are especially used for notifications to OStatus users that don't follow us.
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if ($slap && count($url_recipients) && ($public_message || $push_notify) && $normal_mode) {
if (!get_config('system','dfrn_only')) {
foreach ($url_recipients as $url) {
if ($url) {
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logger('notifier: urldelivery: ' . $url);
$deliver_status = slapper($owner,$url,$slap);
/// @TODO Redeliver/queue these items on failure, though there is no contact record
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}
}
}
}
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if ($public_message) {
$r0 = array();
$r1 = array();
if ($diaspora_delivery) {
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if (!$followup) {
$r0 = Diaspora::relay_list();
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}
$r1 = q("SELECT `batch`, ANY_VALUE(`id`) AS `id`, ANY_VALUE(`name`) AS `name`, ANY_VALUE(`network`) AS `network`
FROM `contact` WHERE `network` = '%s'
AND `uid` = %d AND `rel` != %d AND NOT `blocked` AND NOT `pending` AND NOT `archive` GROUP BY `batch` ORDER BY rand()",
dbesc(NETWORK_DIASPORA),
intval($owner['uid']),
intval(CONTACT_IS_SHARING)
);
}
$r2 = q("SELECT `id`, `name`,`network` FROM `contact`
WHERE `network` in ( '%s', '%s') AND `uid` = %d AND NOT `blocked` AND NOT `pending` AND NOT `archive`
AND `rel` != %d order by rand() ",
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dbesc(NETWORK_DFRN),
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dbesc(NETWORK_MAIL2),
intval($owner['uid']),
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intval(CONTACT_IS_SHARING)
);
$r = array_merge($r2,$r1,$r0);
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if (dbm::is_result($r)) {
logger('pubdeliver '.$target_item["guid"].': '.print_r($r,true), LOGGER_DEBUG);
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foreach ($r as $rr) {
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// except for Diaspora batch jobs
// Don't deliver to folks who have already been delivered to
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if (($rr['network'] !== NETWORK_DIASPORA) && (in_array($rr['id'],$conversants))) {
logger('notifier: already delivered id=' . $rr['id']);
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continue;
}
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if ((! $mail) && (! $fsuggest) && (! $followup)) {
logger('notifier: delivery agent: '.$rr['name'].' '.$rr['id'].' '.$rr['network'].' '.$target_item["guid"]);
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proc_run(array('priority' => $priority, 'dont_fork' => true), 'include/delivery.php', $cmd, $item_id, $rr['id']);
}
}
}
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$push_notify = true;
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}
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// Notify PuSH subscribers (Used for OStatus distribution of regular posts)
if ($push_notify && strlen($hub)) {
$hubs = explode(',', $hub);
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if (count($hubs)) {
foreach ($hubs as $h) {
$h = trim($h);
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if (! strlen($h)) {
continue;
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}
if ($h === '[internal]') {
// Set push flag for PuSH subscribers to this topic,
// they will be notified in queue.php
q("UPDATE `push_subscriber` SET `push` = 1 ".
"WHERE `nickname` = '%s' AND `push` = 0", dbesc($owner['nickname']));
logger('Activating internal PuSH for item '.$item_id, LOGGER_DEBUG);
} else {
$params = 'hub.mode=publish&hub.url=' . urlencode( App::get_baseurl() . '/dfrn_poll/' . $owner['nickname'] );
post_url($h,$params);
logger('publish for item '.$item_id.' ' . $h . ' ' . $params . ' returned ' . $a->get_curl_code());
}
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if (count($hubs) > 1) {
sleep(7); // try and avoid multiple hubs responding at precisely the same time
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}
}
}
// Handling the pubsubhubbub requests
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proc_run(array('priority' => PRIORITY_HIGH, 'dont_fork' => true), 'include/pubsubpublish.php');
}
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logger('notifier: calling hooks', LOGGER_DEBUG);
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if ($normal_mode) {
call_hooks('notifier_normal',$target_item);
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}
call_hooks('notifier_end',$target_item);
return;
}