friendica_2021-01/src/Worker/Delivery.php

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<?php
/**
* @file src/Worker/Delivery.php
*/
namespace Friendica\Worker;
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use Friendica\Core\Config;
use Friendica\Core\L10n;
use Friendica\Core\System;
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use Friendica\Database\DBM;
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use Friendica\Model\Contact;
use Friendica\Model\Item;
use Friendica\Model\Queue;
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use Friendica\Model\User;
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use Friendica\Protocol\DFRN;
use Friendica\Protocol\Diaspora;
use Friendica\Protocol\Email;
use dba;
require_once 'include/items.php';
/// @todo This is some ugly code that needs to be split into several methods
class Delivery {
public static function execute($cmd, $item_id, $contact_id) {
global $a;
logger('delivery: invoked: '.$cmd.': '.$item_id.' to '.$contact_id, LOGGER_DEBUG);
$top_level = false;
$recipients = [];
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$followup = false;
$recipients[] = $contact_id;
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if ($cmd == DELIVER_MAIL) {
$target_item = dba::selectFirst('mail', [], ['id' => $item_id]);
if (!DBM::is_result($message)) {
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return;
}
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$uid = $target_item['uid'];
$recipients[] = $target_item['contact-id'];
} elseif ($cmd == DELIVER_SUGGESTION) {
$target_item = dba::selectFirst('fsuggest', [], ['id' => $item_id]);
if (!DBM::is_result($message)) {
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return;
}
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$uid = $target_item['uid'];
$recipients[] = $target_item['contact-id'];
} elseif ($cmd == DELIVER_RELOCATION) {
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$uid = $item_id;
} else {
// find ancestors
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$target_item = dba::fetch_first("SELECT `item`.*, `contact`.`uid` AS `cuid`,
`sign`.`signed_text`,`sign`.`signature`,`sign`.`signer`
FROM `item`
INNER JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
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LEFT JOIN `sign` ON `sign`.`iid` = `item`.`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 = $target_item['edited'];
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$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",
intval($parent_id)
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);
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if (!DBM::is_result($items)) {
return;
}
$icontacts = null;
$contacts_arr = [];
foreach ($items as $item) {
if (!in_array($item['contact-id'],$contacts_arr)) {
$contacts_arr[] = intval($item['contact-id']);
}
}
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if (count($contacts_arr)) {
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$str_contacts = implode(',',$contacts_arr);
$icontacts = q("SELECT * FROM `contact`
WHERE `id` IN ( $str_contacts ) "
);
}
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if (!DBM::is_result($icontacts)) {
return;
}
// avoid race condition with deleting entries
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if ($items[0]['deleted']) {
foreach ($items as $item) {
$item['deleted'] = 1;
}
}
// When commenting too fast after delivery, a post wasn't recognized as top level post.
// The count then showed more than one entry. The additional check should help.
// The check for the "count" should be superfluous, but I'm not totally sure by now, so we keep it.
if ((($items[0]['id'] == $item_id) || (count($items) == 1)) && ($items[0]['uri'] === $items[0]['parent-uri'])) {
logger('delivery: top level post');
$top_level = true;
}
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}
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$owner = User::getOwnerDataById($uid);
if (!$owner) {
return;
}
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// We don't treat Forum posts as "wall-to-wall" to be able to post them via Diaspora
$walltowall = $top_level && ($owner['id'] != $items[0]['contact-id']) & ($owner['account-type'] != ACCOUNT_TYPE_COMMUNITY);
$public_message = true;
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if (!in_array($cmd, [DELIVER_MAIL, DELIVER_SUGGESTION, DELIVER_RELOCATION])) {
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$parent = $items[0];
// 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 $parent['wall'] == 1 we will already have the parent message in our array
// and we will relay the whole lot.
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$localhost = $a->get_hostname();
if (strpos($localhost,':')) {
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$localhost = substr($localhost,0,strpos($localhost,':'));
}
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/**
*
* Be VERY CAREFUL if you make any changes to the following line. Seemingly innocuous changes
* have been known to cause runaway conditions which affected several servers, along with
* permissions issues.
*
*/
if (!$top_level && ($parent['wall'] == 0) && stristr($target_item['uri'], $localhost)) {
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logger('followup '.$target_item["guid"], LOGGER_DEBUG);
// local followup to remote post
$followup = true;
}
if (strlen($parent['allow_cid'])
|| strlen($parent['allow_gid'])
|| strlen($parent['deny_cid'])
|| strlen($parent['deny_gid'])
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|| $parent["private"]) {
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$public_message = false; // private recipients, not public
}
}
// We don't deliver our items to blocked or pending contacts, and not to ourselves either
$contact = dba::selectFirst('contact', [],
['id' => $contact_id, 'blocked' => false, 'pending' => false, 'self' => false]
);
if (!DBM::is_result($contact)) {
return;
}
$deliver_status = 0;
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logger("Delivering " . $cmd . " followup=$followup - network ".$contact['network']);
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switch ($contact['network']) {
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case NETWORK_DFRN:
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self::deliverDFRN($cmd, $contact, $icontacts, $owner, $items, $target_item, $public_message, $top_level, $followup);
break;
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case NETWORK_DIASPORA:
self::deliverDiaspora($cmd, $contact, $owner, $target_item, $public_message, $top_level, $followup, $walltowall);
break;
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case NETWORK_OSTATUS:
// Do not send to otatus if we are not configured to send to public networks
if ($owner['prvnets']) {
break;
}
if (Config::get('system','ostatus_disabled') || Config::get('system','dfrn_only')) {
break;
}
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// There is currently no code here to distribute anything to OStatus.
// This is done in "notifier.php" (See "url_recipients" and "push_notify")
break;
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case NETWORK_MAIL:
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self::deliverMail($cmd, $contact, $owner, $target_item);
break;
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default:
break;
}
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return;
}
private static function deliverDFRN($cmd, $contact, $icontacts, $owner, $items, $target_item, $public_message, $top_level, $followup)
{
logger('notifier: '.$target_item["guid"].' dfrndelivery: '.$contact['name']);
if ($cmd == DELIVER_MAIL) {
$item = $target_item;
$item['body'] = Item::fixPrivatePhotos($item['body'], $owner['uid'], null, $item['contact-id']);
$atom = DFRN::mail($item, $owner);
} elseif ($cmd == DELIVER_SUGGESTION) {
$item = $target_item;
$atom = DFRN::fsuggest($item, $owner);
dba::delete('fsuggest', ['id' => $item['id']]);
} elseif ($cmd == DELIVER_RELOCATION) {
$atom = DFRN::relocate($owner, $owner['uid']);
} elseif ($followup) {
$msgitems = [];
$msgitems[] = $target_item;
$atom = DFRN::entries($msgitems, $owner);
} else {
$msgitems = [];
foreach ($items as $item) {
if (!$item['parent']) {
return;
}
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// private emails may be in included in public conversations. Filter them.
if ($public_message && $item['private']) {
return;
}
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$item_contact = self::getItemContact($item, $icontacts);
if (!$item_contact) {
return;
}
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if (!in_array($cmd, [DELIVER_MAIL, DELIVER_SUGGESTION, DELIVER_RELOCATION])) {
// Only add the parent when we don't delete other items.
if ($target_item['id'] == $item['id'] || (($item['id'] == $item['parent']) && ($cmd != DELIVER_DELETION))) {
$item["entry:comment-allow"] = true;
$item["entry:cid"] = ($top_level ? $contact['id'] : 0);
$msgitems[] = $item;
}
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} else {
$item["entry:comment-allow"] = true;
$msgitems[] = $item;
}
}
$atom = DFRN::entries($msgitems,$owner);
}
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logger('notifier entry: '.$contact["url"].' '.$target_item["guid"].' entry: '.$atom, LOGGER_DEBUG);
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logger('notifier: '.$atom, LOGGER_DATA);
$basepath = implode('/', array_slice(explode('/',$contact['url']),0,3));
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// perform local delivery if we are on the same site
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if (link_compare($basepath, System::baseUrl())) {
$condition = ['nurl' => normalise_link($contact['url']), 'self' => true];
$target_self = dba::selectFirst('contact', ['uid'], $condition);
if (!DBM::is_result($target_self)) {
return;
}
$target_uid = $target_self['uid'];
// Check if the user has got this contact
$cid = Contact::getIdForURL($owner['url'], $target_uid);
if (!$cid) {
// Otherwise there should be a public contact
$cid = Contact::getIdForURL($owner['url']);
if (!$cid) {
return;
}
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}
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// We now have some contact, so we fetch it
$target_importer = dba::fetch_first("SELECT *, `name` as `senderName`
FROM `contact`
WHERE NOT `blocked` AND `id` = ? LIMIT 1",
$cid);
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// This should never fail
if (!DBM::is_result($target_importer)) {
return;
}
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// Set the user id. This is important if this is a public contact
$target_importer['importer_uid'] = $target_uid;
DFRN::import($atom, $target_importer);
return;
}
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if ($items[0]['uid'] == 0) {
$deliver_status = DFRN::transmit($owner, $contact, $atom);
if ($deliver_status < 200) {
// Transmit via Diaspora if not possible via Friendica
self::deliverDiaspora($cmd, $contact, $owner, $target_item, $public_message, $top_level, $followup, false);
return;
}
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$deliver_status = DFRN::deliver($owner, $contact, $atom);
}
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logger('notifier: dfrn_delivery to '.$contact["url"].' with guid '.$target_item["guid"].' returns '.$deliver_status);
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if ($deliver_status < 0) {
logger('notifier: delivery failed: queuing message');
Queue::add($contact['id'], NETWORK_DFRN, $atom, false, $target_item['guid']);
}
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if (($deliver_status >= 200) && ($deliver_status <= 299)) {
// We successfully delivered a message, the contact is alive
Contact::unmarkForArchival($contact);
} else {
// The message could not be delivered. We mark the contact as "dead"
Contact::markForArchival($contact);
}
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}
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private static function deliverDiaspora($cmd, $contact, $owner, $target_item, $public_message, $top_level, $followup, $walltowall)
{
if ($public_message) {
$loc = 'public batch ' . $contact['batch'];
} else {
$loc = $contact['name'];
}
logger('delivery: diaspora batch deliver: ' . $loc);
if (Config::get('system', 'dfrn_only') || !Config::get('system', 'diaspora_enabled')) {
return;
}
if ($cmd == DELIVER_MAIL) {
Diaspora::sendMail($target_item, $owner, $contact);
return;
}
if ($cmd == DELIVER_SUGGESTION) {
return;
}
if (!$contact['pubkey'] && !$public_message) {
return;
}
if (($target_item['deleted']) && (($target_item['uri'] === $target_item['parent-uri']) || $followup)) {
// top-level retraction
logger('diaspora retract: ' . $loc);
Diaspora::sendRetraction($target_item, $owner, $contact, $public_message);
return;
} elseif ($cmd == DELIVER_RELOCATION) {
Diaspora::sendAccountMigration($owner, $contact, $owner['uid']);
return;
} elseif ($followup) {
// send comments and likes to owner to relay
logger('diaspora followup: ' . $loc);
Diaspora::sendFollowup($target_item, $owner, $contact, $public_message);
return;
} elseif ($target_item['uri'] !== $target_item['parent-uri']) {
// we are the relay - send comments, likes and relayable_retractions to our conversants
logger('diaspora relay: ' . $loc);
Diaspora::sendRelay($target_item, $owner, $contact, $public_message);
return;
} elseif ($top_level && !$walltowall) {
// currently no workable solution for sending walltowall
logger('diaspora status: ' . $loc);
Diaspora::sendStatus($target_item, $owner, $contact, $public_message);
return;
}
logger('Unknown mode ' . $cmd . ' for '.$contact['name']);
}
private static function deliverMail($cmd, $contact, $owner, $target_item)
{
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global $a;
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if (Config::get('system','dfrn_only')) {
return;
}
// WARNING: does not currently convert to RFC2047 header encodings, etc.
$addr = $contact['addr'];
if (!strlen($addr)) {
return;
}
if (!in_array($cmd, [DELIVER_POST, DELIVER_COMMENT])) {
return;
}
$local_user = dba::selectFirst('user', [], ['uid' => $owner['uid']]);
if (!DBM::is_result($local_user)) {
return;
}
$reply_to = '';
$mailacct = dba::selectFirst('mailacct', ['reply_to'], ['uid' => $owner['uid']]);
if (DBM::is_result($mailacct) && !empty($mailacct['reply_to'])) {
$reply_to = $mailacct['reply_to'];
}
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$subject = ($target_item['title'] ? Email::encodeHeader($target_item['title'], 'UTF-8') : L10n::t("\x28no subject\x29"));
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// only expose our real email address to true friends
if (($contact['rel'] == CONTACT_IS_FRIEND) && !$contact['blocked']) {
if ($reply_to) {
$headers = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8') . ' <' . $reply_to.'>' . "\n";
$headers .= 'Sender: ' . $local_user['email'] . "\n";
} else {
$headers = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8').' <' . $local_user['email'] . '>' . "\n";
}
} else {
$headers = 'From: '. Email::encodeHeader($local_user['username'], 'UTF-8') . ' <noreply@' . $a->get_hostname() . '>' . "\n";
}
$headers .= 'Message-Id: <' . Email::iri2msgid($target_item['uri']) . '>' . "\n";
if ($target_item['uri'] !== $target_item['parent-uri']) {
$headers .= "References: <" . Email::iri2msgid($target_item["parent-uri"]) . ">";
// If Threading is enabled, write down the correct parent
if (($target_item["thr-parent"] != "") && ($target_item["thr-parent"] != $target_item["parent-uri"])) {
$headers .= " <".Email::iri2msgid($target_item["thr-parent"]).">";
}
$headers .= "\n";
if (empty($target_item['title'])) {
$condition = ['uri' => $target_item['parent-uri'], 'uid' => $owner['uid']];
$title = dba::selectFirst('item', ['title'], $condition);
if (DBM::is_result($title) && ($title['title'] != '')) {
$subject = $title['title'];
} else {
$condition = ['parent-uri' => $target_item['parent-uri'], 'uid' => $owner['uid']];
$title = dba::selectFirst('item', ['title'], $condition);
if (DBM::is_result($title) && ($title['title'] != '')) {
$subject = $title['title'];
}
}
}
if (strncasecmp($subject, 'RE:', 3)) {
$subject = 'Re: ' . $subject;
}
}
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Email::send($addr, $subject, $headers, $target_item);
}
private static function getItemContact($item, $contacts)
{
if (!count($contacts) || !is_array($item)) {
return false;
}
foreach ($contacts as $contact) {
if ($contact['id'] == $item['contact-id']) {
return $contact;
}
}
return false;
}
}