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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friendica/src/Protocol/Diaspora.php

4197 lines
129 KiB

<?php
/**
* @copyright Copyright (C) 2010-2022, the Friendica project
*
* @license GNU AGPL version 3 or any later version
*
* This program 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.
*
* This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
namespace Friendica\Protocol;
use Friendica\Content\Feature;
use Friendica\Content\Text\BBCode;
use Friendica\Content\Text\Markdown;
use Friendica\Core\Cache\Enum\Duration;
use Friendica\Core\Logger;
use Friendica\Core\Protocol;
use Friendica\Core\System;
use Friendica\Core\Worker;
use Friendica\Database\DBA;
use Friendica\DI;
use Friendica\Model\Contact;
use Friendica\Model\Conversation;
use Friendica\Model\FContact;
use Friendica\Model\GServer;
use Friendica\Model\Item;
use Friendica\Model\ItemURI;
use Friendica\Model\Mail;
use Friendica\Model\Post;
use Friendica\Model\Tag;
use Friendica\Model\User;
use Friendica\Network\HTTPClient\Client\HttpClientAccept;
use Friendica\Network\Probe;
use Friendica\Util\Crypto;
use Friendica\Util\DateTimeFormat;
use Friendica\Util\Map;
use Friendica\Util\Network;
use Friendica\Util\Strings;
use Friendica\Util\XML;
use Friendica\Worker\Delivery;
use GuzzleHttp\Psr7\Uri;
use SimpleXMLElement;
/**
* This class contain functions to create and send Diaspora XML files
*/
class Diaspora
{
const PUSHED = 0;
const FETCHED = 1;
const FORCED_FETCH = 2;
/**
* Return a list of participating contacts for a thread
*
* This is used for the participation feature.
* One of the parameters is a contact array.
* This is done to avoid duplicates.
*
* @param array $item Item that is about to be delivered
* @param array $contacts The previously fetched contacts
*
* @return array of relay servers
* @throws \Exception
*/
public static function participantsForThread(array $item, array $contacts): array
{
if (!in_array($item['private'], [Item::PUBLIC, Item::UNLISTED]) || in_array($item['verb'], [Activity::FOLLOW, Activity::TAG])) {
Logger::info('Item is private or a participation request. It will not be relayed', ['guid' => $item['guid'], 'private' => $item['private'], 'verb' => $item['verb']]);
return $contacts;
}
$items = Post::select(['author-id', 'author-link', 'parent-author-link', 'parent-guid', 'guid'],
['parent' => $item['parent'], 'gravity' => [GRAVITY_COMMENT, GRAVITY_ACTIVITY]]);
while ($item = Post::fetch($items)) {
$contact = DBA::selectFirst('contact', ['id', 'url', 'name', 'protocol', 'batch', 'network'],
['id' => $item['author-id']]);
if (!DBA::isResult($contact) || empty($contact['batch']) ||
($contact['network'] != Protocol::DIASPORA) ||
Strings::compareLink($item['parent-author-link'], $item['author-link'])) {
continue;
}
$exists = false;
foreach ($contacts as $entry) {
if ($entry['batch'] == $contact['batch']) {
$exists = true;
}
}
if (!$exists) {
Logger::info('Add participant to receiver list', ['parent' => $item['parent-guid'], 'item' => $item['guid'], 'participant' => $contact['url']]);
$contacts[] = $contact;
}
}
DBA::close($items);
return $contacts;
}
/**
* verify the envelope and return the verified data
*
* @param string $envelope The magic envelope
*
* @return string|bool verified data or false on error
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function verifyMagicEnvelope(string $envelope)
{
$basedom = XML::parseString($envelope, true);
if (!is_object($basedom)) {
Logger::notice('Envelope is no XML file');
return false;
}
$children = $basedom->children(ActivityNamespace::SALMON_ME);
if (sizeof($children) == 0) {
Logger::notice('XML has no children');
return false;
}
$handle = '';
$data = Strings::base64UrlDecode($children->data);
$type = $children->data->attributes()->type[0];
$encoding = $children->encoding;
$alg = $children->alg;
$sig = Strings::base64UrlDecode($children->sig);
$key_id = $children->sig->attributes()->key_id[0];
if ($key_id != '') {
$handle = Strings::base64UrlDecode($key_id);
}
$b64url_data = Strings::base64UrlEncode($data);
$msg = str_replace(["\n", "\r", " ", "\t"], ['', '', '', ''], $b64url_data);
$signable_data = $msg . '.' . Strings::base64UrlEncode($type) . '.' . Strings::base64UrlEncode($encoding) . '.' . Strings::base64UrlEncode($alg);
if ($handle == '') {
Logger::notice('No author could be decoded. Discarding. Message: ' . $envelope);
return false;
}
$key = self::key($handle);
if ($key == '') {
Logger::notice("Couldn't get a key for handle " . $handle . ". Discarding.");
return false;
}
$verify = Crypto::rsaVerify($signable_data, $sig, $key);
if (!$verify) {
Logger::notice('Message from ' . $handle . ' did not verify. Discarding.');
return false;
}
return $data;
}
/**
* encrypts data via AES
*
* @param string $key The AES key
* @param string $iv The IV (is used for CBC encoding)
* @param string $data The data that is to be encrypted
*
* @return string encrypted data
*/
private static function aesEncrypt(string $key, string $iv, string $data): string
{
return openssl_encrypt($data, 'aes-256-cbc', str_pad($key, 32, "\0"), OPENSSL_RAW_DATA, str_pad($iv, 16, "\0"));
}
/**
* decrypts data via AES
*
* @param string $key The AES key
* @param string $iv The IV (is used for CBC encoding)
* @param string $encrypted The encrypted data
*
* @return string decrypted data
*/
private static function aesDecrypt(string $key, string $iv, string $encrypted): string
{
return openssl_decrypt($encrypted, 'aes-256-cbc', str_pad($key, 32, "\0"), OPENSSL_RAW_DATA, str_pad($iv, 16, "\0"));
}
/**
* Decodes incoming Diaspora message in the new format. This method returns false on an error.
*
* @param string $raw raw post message
* @param string $privKey The private key of the importer
* @param boolean $no_exit Don't do an http exit on error
*
* @return bool|array
* 'message' -> decoded Diaspora XML message
* 'author' -> author diaspora handle
* 'key' -> author public key (converted to pkcs#8)
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
public static function decodeRaw(string $raw, string $privKey = '', bool $no_exit = false)
{
$data = json_decode($raw);
// Is it a private post? Then decrypt the outer Salmon
if (is_object($data)) {
$encrypted_aes_key_bundle = base64_decode($data->aes_key);
$ciphertext = base64_decode($data->encrypted_magic_envelope);
$outer_key_bundle = '';
@openssl_private_decrypt($encrypted_aes_key_bundle, $outer_key_bundle, $privKey);
$j_outer_key_bundle = json_decode($outer_key_bundle);
if (!is_object($j_outer_key_bundle)) {
Logger::notice('Outer Salmon did not verify. Discarding.');
if ($no_exit) {
return false;
} else {
throw new \Friendica\Network\HTTPException\BadRequestException();
}
}
$outer_iv = base64_decode($j_outer_key_bundle->iv);
$outer_key = base64_decode($j_outer_key_bundle->key);
$xml = self::aesDecrypt($outer_key, $outer_iv, $ciphertext);
} else {
$xml = $raw;
}
$basedom = XML::parseString($xml, true);
if (!is_object($basedom)) {
Logger::notice('Received data does not seem to be an XML. Discarding. '.$xml);
if ($no_exit) {
return false;
} else {
throw new \Friendica\Network\HTTPException\BadRequestException();
}
}
$base = $basedom->children(ActivityNamespace::SALMON_ME);
// Not sure if this cleaning is needed
$data = str_replace([" ", "\t", "\r", "\n"], ['', '', '', ''], $base->data);
// Build the signed data
$type = $base->data[0]->attributes()->type[0];
$encoding = $base->encoding;
$alg = $base->alg;
$signed_data = $data . '.' . Strings::base64UrlEncode($type) . '.' . Strings::base64UrlEncode($encoding) . '.' . Strings::base64UrlEncode($alg);
// This is the signature
$signature = Strings::base64UrlDecode($base->sig);
// Get the senders' public key
$key_id = $base->sig[0]->attributes()->key_id[0];
$author_addr = base64_decode($key_id);
if ($author_addr == '') {
Logger::notice('No author could be decoded. Discarding. Message: ' . $xml);
if ($no_exit) {
return false;
} else {
throw new \Friendica\Network\HTTPException\BadRequestException();
}
}
$key = self::key($author_addr);
if ($key == '') {
Logger::notice("Couldn't get a key for handle " . $author_addr . ". Discarding.");
if ($no_exit) {
return false;
} else {
throw new \Friendica\Network\HTTPException\BadRequestException();
}
}
$verify = Crypto::rsaVerify($signed_data, $signature, $key);
if (!$verify) {
Logger::notice('Message did not verify. Discarding.');
if ($no_exit) {
return false;
} else {
throw new \Friendica\Network\HTTPException\BadRequestException();
}
}
return [
'message' => (string)Strings::base64UrlDecode($base->data),
'author' => XML::unescape($author_addr),
'key' => (string)$key
];
}
/**
* Decodes incoming Diaspora message in the deprecated format
*
* @param string $xml urldecoded Diaspora salmon
* @param string $privKey The private key of the importer
*
* @return array
* 'message' -> decoded Diaspora XML message
* 'author' -> author diaspora handle
* 'key' -> author public key (converted to pkcs#8)
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
public static function decode(string $xml, string $privKey = '')
{
$public = false;
$basedom = XML::parseString($xml);
if (!is_object($basedom)) {
Logger::notice('XML is not parseable.');
return false;
}
$children = $basedom->children('https://joindiaspora.com/protocol');
$inner_aes_key = null;
$inner_iv = null;
if ($children->header) {
$public = true;
$author_link = str_replace('acct:', '', $children->header->author_id);
} else {
// This happens with posts from a relais
if (empty($privKey)) {
Logger::info('This is no private post in the old format');
return false;
}
$encrypted_header = json_decode(base64_decode($children->encrypted_header));
$encrypted_aes_key_bundle = base64_decode($encrypted_header->aes_key);
$ciphertext = base64_decode($encrypted_header->ciphertext);
$outer_key_bundle = '';
openssl_private_decrypt($encrypted_aes_key_bundle, $outer_key_bundle, $privKey);
$j_outer_key_bundle = json_decode($outer_key_bundle);
$outer_iv = base64_decode($j_outer_key_bundle->iv);
$outer_key = base64_decode($j_outer_key_bundle->key);
$decrypted = self::aesDecrypt($outer_key, $outer_iv, $ciphertext);
Logger::info('decrypted', ['data' => $decrypted]);
$idom = XML::parseString($decrypted);
$inner_iv = base64_decode($idom->iv);
$inner_aes_key = base64_decode($idom->aes_key);
$author_link = str_replace('acct:', '', $idom->author_id);
}
$dom = $basedom->children(ActivityNamespace::SALMON_ME);
// figure out where in the DOM tree our data is hiding
$base = null;
if ($dom->provenance->data) {
$base = $dom->provenance;
} elseif ($dom->env->data) {
$base = $dom->env;
} elseif ($dom->data) {
$base = $dom;
}
if (!$base) {
Logger::notice('unable to locate salmon data in xml');
throw new \Friendica\Network\HTTPException\BadRequestException();
}
// Stash the signature away for now. We have to find their key or it won't be good for anything.
$signature = Strings::base64UrlDecode($base->sig);
// unpack the data
// strip whitespace so our data element will return to one big base64 blob
$data = str_replace([" ", "\t", "\r", "\n"], ['', '', '', ''], $base->data);
// stash away some other stuff for later
$type = $base->data[0]->attributes()->type[0];
$keyhash = $base->sig[0]->attributes()->keyhash[0];
$encoding = $base->encoding;
$alg = $base->alg;
$signed_data = $data.'.'.Strings::base64UrlEncode($type).'.'.Strings::base64UrlEncode($encoding).'.'.Strings::base64UrlEncode($alg);
// decode the data
$data = Strings::base64UrlDecode($data);
if ($public) {
$inner_decrypted = $data;
} else {
// Decode the encrypted blob
$inner_encrypted = base64_decode($data);
$inner_decrypted = self::aesDecrypt($inner_aes_key, $inner_iv, $inner_encrypted);
}
if (!$author_link) {
Logger::notice('Could not retrieve author URI.');
throw new \Friendica\Network\HTTPException\BadRequestException();
}
// Once we have the author URI, go to the web and try to find their public key
// (first this will look it up locally if it is in the fcontact cache)
// This will also convert diaspora public key from pkcs#1 to pkcs#8
Logger::notice('Fetching key for '.$author_link);
$key = self::key($author_link);
if (!$key) {
Logger::notice('Could not retrieve author key.');
throw new \Friendica\Network\HTTPException\BadRequestException();
}
$verify = Crypto::rsaVerify($signed_data, $signature, $key);
if (!$verify) {
Logger::notice('Message did not verify. Discarding.');
throw new \Friendica\Network\HTTPException\BadRequestException();
}
Logger::notice('Message verified.');
return [
'message' => (string)$inner_decrypted,
'author' => XML::unescape($author_link),
'key' => (string)$key
];
}
/**
* Dispatches public messages and find the fitting receivers
*
* @param array $msg The post that will be dispatched
* @param int $direction Indicates if the message had been fetched or pushed (self::PUSHED, self::FETCHED, self::FORCED_FETCH)
*
* @return int|bool The message id of the generated message, "true" or "false" if there was an error
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
public static function dispatchPublic(array $msg, int $direction)
{
$enabled = intval(DI::config()->get('system', 'diaspora_enabled'));
if (!$enabled) {
Logger::notice('Diaspora is disabled');
return false;
}
if (!($fields = self::validPosting($msg))) {
Logger::warning('Invalid posting');
return false;
}
$importer = [
'uid' => 0,
'page-flags' => User::PAGE_FLAGS_FREELOVE
];
$success = self::dispatch($importer, $msg, $fields, $direction);
return $success;
}
/**
* Dispatches the different message types to the different functions
*
* @param array $importer Array of the importer user
* @param array $msg The post that will be dispatched
* @param SimpleXMLElement $fields SimpleXML object that contains the message
* @param int $direction Indicates if the message had been fetched or pushed (self::PUSHED, self::FETCHED, self::FORCED_FETCH)
*
* @return int|bool The message id of the generated message, "true" or "false" if there was an error
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
public static function dispatch(array $importer, array $msg, SimpleXMLElement $fields = null, int $direction = self::PUSHED)
{
// The sender is the handle of the contact that sent the message.
// This will often be different with relayed messages (for example "like" and "comment")
$sender = $msg['author'];
// This is only needed for private postings since this is already done for public ones before
if (is_null($fields)) {
$private = true;
if (!($fields = self::validPosting($msg))) {
Logger::warning('Invalid posting');
return false;
}
} else {
$private = false;
}
$type = $fields->getName();
Logger::info('Received message', ['type' => $type, 'sender' => $sender, 'user' => $importer['uid']]);
switch ($type) {
case 'account_migration':
if (!$private) {
Logger::notice('Message with type ' . $type . ' is not private, quitting.');
return false;
}
return self::receiveAccountMigration($importer, $fields);
case 'account_deletion':
return self::receiveAccountDeletion($fields);
case 'comment':
return self::receiveComment($importer, $sender, $fields, $msg['message'], $direction);
case 'contact':
if (!$private) {
Logger::notice('Message with type ' . $type . ' is not private, quitting.');
return false;
}
return self::receiveContactRequest($importer, $fields);
case 'conversation':
if (!$private) {
Logger::notice('Message with type ' . $type . ' is not private, quitting.');
return false;
}
return self::receiveConversation($importer, $msg, $fields);
case 'like':
return self::receiveLike($importer, $sender, $fields, $direction);
case 'message':
if (!$private) {
Logger::notice('Message with type ' . $type . ' is not private, quitting.');
return false;
}
return self::receiveMessage($importer, $fields);
case 'participation':
if (!$private) {
Logger::notice('Message with type ' . $type . ' is not private, quitting.');
return false;
}
return self::receiveParticipation($importer, $fields, $direction);
case 'photo': // Not implemented
return self::receivePhoto($importer, $fields);
case 'poll_participation': // Not implemented
return self::receivePollParticipation($importer, $fields);
case 'profile':
if (!$private) {
Logger::notice('Message with type ' . $type . ' is not private, quitting.');
return false;
}
return self::receiveProfile($importer, $fields);
case 'reshare':
return self::receiveReshare($importer, $fields, $msg['message'], $direction);
case 'retraction':
return self::receiveRetraction($importer, $sender, $fields);
case 'status_message':
return self::receiveStatusMessage($importer, $fields, $msg['message'], $direction);
default:
Logger::notice('Unknown message type ' . $type);
return false;
}
}
/**
* Checks if a posting is valid and fetches the data fields.
*
* This function does not only check the signature.
* It also does the conversion between the old and the new diaspora format.
*
* @param array $msg Array with the XML, the sender handle and the sender signature
*
* @return bool|SimpleXMLElement If the posting is valid then an array with an SimpleXML object is returned
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function validPosting(array $msg)
{
$data = XML::parseString($msg['message']);
if (!is_object($data)) {
Logger::info('No valid XML', ['message' => $msg['message']]);
return false;
}
// Is this the new or the old version?
if ($data->getName() == 'XML') {
$oldXML = true;
foreach ($data->post->children() as $child) {
$element = $child;
}
} else {
$oldXML = false;
$element = $data;
}
$type = $element->getName();
$orig_type = $type;
Logger::debug('Got message', ['type' => $type, 'message' => $msg['message']]);
// All retractions are handled identically from now on.
// In the new version there will only be "retraction".
if (in_array($type, ['signed_retraction', 'relayable_retraction']))
$type = 'retraction';
if ($type == 'request') {
$type = 'contact';
}
$fields = new SimpleXMLElement('<' . $type . '/>');
$signed_data = '';
$author_signature = null;
$parent_author_signature = null;
foreach ($element->children() as $fieldname => $entry) {
if ($oldXML) {
// Translation for the old XML structure
if ($fieldname == 'diaspora_handle') {
$fieldname = 'author';
}
if ($fieldname == 'participant_handles') {
$fieldname = 'participants';
}
if (in_array($type, ['like', 'participation'])) {
if ($fieldname == 'target_type') {
$fieldname = 'parent_type';
}
}
if ($fieldname == 'sender_handle') {
$fieldname = 'author';
}
if ($fieldname == 'recipient_handle') {
$fieldname = 'recipient';
}
if ($fieldname == 'root_diaspora_id') {
$fieldname = 'root_author';
}
if ($type == 'status_message') {
if ($fieldname == 'raw_message') {
$fieldname = 'text';
}
}
if ($type == 'retraction') {
if ($fieldname == 'post_guid') {
$fieldname = 'target_guid';
}
if ($fieldname == 'type') {
$fieldname = 'target_type';
}
}
}
if (($fieldname == 'author_signature') && ($entry != '')) {
$author_signature = base64_decode($entry);
} elseif (($fieldname == 'parent_author_signature') && ($entry != '')) {
$parent_author_signature = base64_decode($entry);
} elseif (!in_array($fieldname, ['author_signature', 'parent_author_signature', 'target_author_signature'])) {
if ($signed_data != '') {
$signed_data .= ';';
}
$signed_data .= $entry;
}
if (!in_array($fieldname, ['parent_author_signature', 'target_author_signature'])
|| ($orig_type == 'relayable_retraction')
) {
XML::copy($entry, $fields, $fieldname);
}
}
// This is something that shouldn't happen at all.
if (in_array($type, ['status_message', 'reshare', 'profile'])) {
if ($msg['author'] != $fields->author) {
Logger::notice('Message handle is not the same as envelope sender. Quitting this message.', ['author1' => $msg['author'], 'author2' => $fields->author]);
return false;
}
}
// Only some message types have signatures. So we quit here for the other types.
if (!in_array($type, ['comment', 'like'])) {
return $fields;
}
if (!isset($author_signature) && ($msg['author'] == $fields->author)) {
Logger::debug('No author signature, but the sender matches the author', ['type' => $type, 'msg-author' => $msg['author'], 'message' => $msg['message']]);
return $fields;
}
// No author_signature? This is a must, so we quit.
if (!isset($author_signature)) {
Logger::info('No author signature', ['type' => $type, 'msg-author' => $msg['author'], 'fields-author' => $fields->author, 'message' => $msg['message']]);
return false;
}
if (isset($parent_author_signature)) {
$key = self::key($msg['author']);
if (empty($key)) {
Logger::info('No key found for parent', ['author' => $msg['author']]);
return false;
}
if (!Crypto::rsaVerify($signed_data, $parent_author_signature, $key, 'sha256')) {
Logger::info('No valid parent author signature for parent author ' . $msg['author'] . ' in type ' . $type . ' - signed data: ' . $signed_data . ' - Message: ' . $msg['message'] . ' - Signature ' . $parent_author_signature);
return false;
}
}
$key = self::key($fields->author);
if (empty($key)) {
Logger::info('No key found', ['author' => $fields->author]);
return false;
}
if (!Crypto::rsaVerify($signed_data, $author_signature, $key, 'sha256')) {
Logger::info('No valid author signature for author ' . $fields->author . ' in type ' . $type . ' - signed data: ' . $signed_data . ' - Message: ' . $msg['message'] . ' - Signature ' . $author_signature);
return false;
} else {
return $fields;
}
}
/**
* Fetches the public key for a given handle
*
* @param string $handle The handle
*
* @return string The public key
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function key(string $handle = null): string
{
$handle = strval($handle);
Logger::notice('Fetching diaspora key', ['handle' => $handle, 'callstack' => System::callstack(20)]);
$fcontact = FContact::getByURL($handle);
if (!empty($fcontact['pubkey'])) {
return $fcontact['pubkey'];
}
return '';
}
/**
* get a handle (user@domain.tld) from a given contact id
*
* @param int $contact_id The id in the contact table
* @param int $pcontact_id The id in the contact table (Used for the public contact)
*
* @return string the handle
* @throws \Exception
*/
private static function handleFromContact(int $contact_id, int $pcontact_id = 0): string
{
$handle = '';
if ($pcontact_id != 0) {
$contact = Contact::getById($pcontact_id, ['addr']);
if (DBA::isResult($contact)) {
$handle = $contact['addr'];
}
}
if (empty($handle)) {
$contact = Contact::getById($contact_id, ['addr']);
if (DBA::isResult($contact)) {
$handle = $contact['addr'];
}
}
return strtolower($handle);
}
/**
* Get a contact id for a given handle
*
* @todo Move to Friendica\Model\Contact
*
* @param int $uid The user id
* @param string $handle The handle in the format user@domain.tld
*
* @return array Contact data
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function contactByHandle(int $uid, string $handle): array
{
return Contact::getByURL($handle, null, [], $uid);
}
/**
* Checks if the given contact url does support ActivityPub
*
* @param string $url profile url
* @param boolean $update true = always update, false = never update, null = update when not found or outdated
* @return boolean
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
public static function isSupportedByContactUrl(string $url, $update = null)
{
return !empty(FContact::getByURL($url, $update));
}
/**
* Check if posting is allowed for this contact
*
* @param array $importer Array of the importer user
* @param array $contact The contact that is checked
* @param bool $is_comment Is the check for a comment?
*
* @return bool is the contact allowed to post?
*/
private static function postAllow(array $importer, array $contact, bool $is_comment = false): bool
{
/*
* Perhaps we were already sharing with this person. Now they're sharing with us.
* That makes us friends.
* Normally this should have handled by getting a request - but this could get lost
*/
// It is deactivated by now, due to side effects. See issue https://github.com/friendica/friendica/pull/4033
// It is not removed by now. Possibly the code is needed?
//if (!$is_comment && $contact["rel"] == Contact::FOLLOWER && in_array($importer["page-flags"], array(User::PAGE_FLAGS_FREELOVE))) {
// Contact::update(
// array('rel' => Contact::FRIEND, 'writable' => true),
// array('id' => $contact["id"], 'uid' => $contact["uid"])
// );
//
// $contact["rel"] = Contact::FRIEND;
// Logger::notice("defining user ".$contact["nick"]." as friend");
//}
// Contact server is blocked
if (Network::isUrlBlocked($contact['url'])) {
return false;
// We don't seem to like that person
} elseif ($contact['blocked']) {
// Maybe blocked, don't accept.
return false;
// We are following this person?
} elseif (($contact['rel'] == Contact::SHARING) || ($contact['rel'] == Contact::FRIEND)) {
// Yes, then it is fine.
return true;
// Is the message a global user or a comment?
} elseif (($importer['uid'] == 0) || $is_comment) {
// Messages for the global users and comments are always accepted
return true;
}
return false;
}
/**
* Fetches the contact id for a handle and checks if posting is allowed
*
* @param array $importer Array of the importer user
* @param string $handle The checked handle in the format user@domain.tld
* @param bool $is_comment Is the check for a comment?
*
* @return array|bool The contact data or false on error
* @throws \Exception
*/
private static function allowedContactByHandle(array $importer, string $handle, bool $is_comment = false)
{
$contact = self::contactByHandle($importer['uid'], $handle);
if (!$contact) {
Logger::notice('A Contact for handle ' . $handle . ' and user ' . $importer['uid'] . ' was not found');
// If a contact isn't found, we accept it anyway if it is a comment
if ($is_comment && ($importer['uid'] != 0)) {
return self::contactByHandle(0, $handle);
} elseif ($is_comment) {
return $importer;
} else {
return false;
}
}
if (!self::postAllow($importer, $contact, $is_comment)) {
Logger::notice('The handle: ' . $handle . ' is not allowed to post to user ' . $importer['uid']);
return false;
}
return $contact;
}
/**
* Does the message already exists on the system?
*
* @param int $uid The user id
* @param string $guid The guid of the message
*
* @return int|bool message id if the message already was stored into the system - or false.
* @throws \Exception
*/
private static function messageExists(int $uid, string $guid)
{
$item = Post::selectFirst(['id'], ['uid' => $uid, 'guid' => $guid]);
if (DBA::isResult($item)) {
Logger::notice('Message ' . $guid . ' already exists for user ' . $uid);
return $item['id'];
}
return false;
}
/**
* Checks for links to posts in a message
*
* @param array $item The item array
* @return void
*/
private static function fetchGuid(array $item)
{
preg_replace_callback(
"=diaspora://.*?/post/([0-9A-Za-z\-_@.:]{15,254}[0-9A-Za-z])=ism",
function ($match) use ($item) {
self::fetchGuidSub($match, $item);
},
$item['body']
);
preg_replace_callback(
"&\[url=/?posts/([^\[\]]*)\](.*)\[\/url\]&Usi",
function ($match) use ($item) {
self::fetchGuidSub($match, $item);
},
$item['body']
);
}
/**
* Checks for relative /people/* links in an item body to match local
* contacts or prepends the remote host taken from the author link.
*
* @param string $body The item body to replace links from
* @param string $author_link The author link for missing local contact fallback
*
* @return string the replaced string
*/
public static function replacePeopleGuid(string $body, string $author_link): string
{
$return = preg_replace_callback(
"&\[url=/people/([^\[\]]*)\](.*)\[\/url\]&Usi",
function ($match) use ($author_link) {
// $match
// 0 => '[url=/people/0123456789abcdef]Foo Bar[/url]'
// 1 => '0123456789abcdef'
// 2 => 'Foo Bar'
$handle = FContact::getUrlByGuid($match[1]);
if ($handle) {
$return = '@[url=' . $handle . ']' . $match[2] . '[/url]';
} else {
// No local match, restoring absolute remote URL from author scheme and host
$author_url = parse_url($author_link);
$return = '[url=' . $author_url['scheme'] . '://' . $author_url['host'] . '/people/' . $match[1] . ']' . $match[2] . '[/url]';
}
return $return;
},
$body
);
return $return;
}
/**
* sub function of "fetchGuid" which checks for links in messages
*
* @param array $match array containing a link that has to be checked for a message link
* @param array $item The item array
* @return void
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function fetchGuidSub(array $match, array $item)
{
if (!self::storeByGuid($match[1], $item['author-link'], true)) {
self::storeByGuid($match[1], $item['owner-link'], true);
}
}
/**
* Fetches an item with a given guid from a given server
*
* @param string $guid the message guid
* @param string $server The server address
* @param bool $force Forced fetch
*
* @return int|bool the message id of the stored message or false
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function storeByGuid(string $guid, string $server, bool $force)
{
$serverparts = parse_url($server);
if (empty($serverparts['host']) || empty($serverparts['scheme'])) {
return false;
}
$server = $serverparts['scheme'] . '://' . $serverparts['host'];
Logger::info('Trying to fetch item ' . $guid . ' from ' . $server);
$msg = self::message($guid, $server);
if (!$msg) {
return false;
}
Logger::info('Successfully fetched item ' . $guid . ' from ' . $server);
// Now call the dispatcher
return self::dispatchPublic($msg, $force ? self::FORCED_FETCH : self::FETCHED);
}
/**
* Fetches a message from a server
*
* @param string $guid message guid
* @param string $server The url of the server
* @param int $level Endless loop prevention
*
* @return array
* 'message' => The message XML
* 'author' => The author handle
* 'key' => The public key of the author
* @throws \Exception
*/
public static function message(string $guid, string $server, int $level = 0)
{
if ($level > 5) {
return false;
}
// This will work for new Diaspora servers and Friendica servers from 3.5
$source_url = $server . '/fetch/post/' . urlencode($guid);
Logger::info('Fetch post from ' . $source_url);
$envelope = DI::httpClient()->fetch($source_url, HttpClientAccept::MAGIC);
if ($envelope) {
Logger::info('Envelope was fetched.');
$x = self::verifyMagicEnvelope($envelope);
if (!$x) {
Logger::info('Envelope could not be verified.');
} else {
Logger::info('Envelope was verified.');
}
} else {
$x = false;
}
if (!$x) {
return false;
}
$source_xml = XML::parseString($x);
if (!is_object($source_xml)) {
return false;
}
if ($source_xml->post->reshare) {
// Reshare of a reshare - old Diaspora version
Logger::info('Message is a reshare');
return self::message($source_xml->post->reshare->root_guid, $server, ++$level);
} elseif ($source_xml->getName() == 'reshare') {
// Reshare of a reshare - new Diaspora version
Logger::info('Message is a new reshare');
return self::message($source_xml->root_guid, $server, ++$level);
}
$author = '';
// Fetch the author - for the old and the new Diaspora version
if ($source_xml->post->status_message && $source_xml->post->status_message->diaspora_handle) {
$author = (string)$source_xml->post->status_message->diaspora_handle;
} elseif ($source_xml->author && ($source_xml->getName() == 'status_message')) {
$author = (string)$source_xml->author;
}
// If this isn't a "status_message" then quit
if (!$author) {
Logger::info("Message doesn't seem to be a status message");
return false;
}
return [
'message' => $x,
'author' => $author,
'key' => self::key($author)
];
}
/**
* Fetches an item with a given URL
*
* @param string $url the message url
* @param int $uid User id
*
* @return int|bool the message id of the stored message or false
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
public static function fetchByURL(string $url, int $uid = 0)
{
// Check for Diaspora (and Friendica) typical paths
if (!preg_match('=(https?://.+)/(?:posts|display|objects)/([a-zA-Z0-9-_@.:%]+[a-zA-Z0-9])=i', $url, $matches)) {
Logger::info('Invalid url', ['url' => $url]);
return false;
}
$guid = urldecode($matches[2]);
$item = Post::selectFirst(['id'], ['guid' => $guid, 'uid' => $uid]);
if (DBA::isResult($item)) {
Logger::info('Found', ['id' => $item['id']]);
return $item['id'];
}
Logger::info('Fetch GUID from origin', ['guid' => $guid, 'server' => $matches[1]]);
$ret = self::storeByGuid($guid, $matches[1], true);
Logger::info('Result', ['ret' => $ret]);
$item = Post::selectFirst(['id'], ['guid' => $guid, 'uid' => $uid]);
if (DBA::isResult($item)) {
Logger::info('Found', ['id' => $item['id']]);
return $item['id'];
} else {
Logger::info('Not found', ['guid' => $guid, 'uid' => $uid]);
return false;
}
}
/**
* Fetches the item record of a given guid
*
* @param int $uid The user id
* @param string $guid message guid
* @param string $author The handle of the item
* @param array $contact The contact of the item owner
*
* @return array|bool the item record or false on failure
* @throws \Exception
*/
private static function parentItem(int $uid, string $guid, string $author, array $contact)
{
$fields = ['id', 'parent', 'body', 'wall', 'uri', 'guid', 'private', 'origin',
'author-name', 'author-link', 'author-avatar', 'gravity',
'owner-name', 'owner-link', 'owner-avatar'];
$condition = ['uid' => $uid, 'guid' => $guid];
$item = Post::selectFirst($fields, $condition);
if (!DBA::isResult($item)) {
$person = FContact::getByURL($author);
$result = self::storeByGuid($guid, $person['url'], false);
// We don't have an url for items that arrived at the public dispatcher
if (!$result && !empty($contact['url'])) {
$result = self::storeByGuid($guid, $contact['url'], false);
}
if ($result) {
Logger::info('Fetched missing item ' . $guid . ' - result: ' . $result);
$item = Post::selectFirst($fields, $condition);
}
}
if (!DBA::isResult($item)) {
Logger::notice('Parent item not found: parent: ' . $guid . ' - user: ' . $uid);
return false;
} else {
Logger::notice('Parent item found: parent: ' . $guid . ' - user: ' . $uid);
return $item;
}
}
/**
* returns contact details
*
* @param array $def_contact The default contact if the person isn't found
* @param array $person The record of the person
* @param int $uid The user id
*
* @return array
* 'cid' => contact id
* 'network' => network type
* @throws \Exception
*/
private static function authorContactByUrl(array $def_contact, array $person, int $uid): array
{
$condition = ['nurl' => Strings::normaliseLink($person['url']), 'uid' => $uid];
$contact = DBA::selectFirst('contact', ['id', 'network'], $condition);
if (DBA::isResult($contact)) {
$cid = $contact['id'];
$network = $contact['network'];
} else {
$cid = $def_contact['id'];
$network = Protocol::DIASPORA;
}
return [
'cid' => $cid,
'network' => $network
];
}
/**
* Is the profile a hubzilla profile?
*
* @param string $url The profile link
*
* @return bool is it a hubzilla server?
*/
private static function isHubzilla(string $url): bool
{
return strstr($url, '/channel/');
}
/**
* Generate a post link with a given handle and message guid
*
* @param string $addr The user handle
* @param string $guid message guid
* @param string $parent_guid optional parent guid
*
* @return string the post link
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function plink(string $addr, string $guid, string $parent_guid = ''): string
{
$contact = Contact::getByURL($addr);
if (empty($contact)) {
Logger::info('No contact data for address', ['addr' => $addr]);
return '';
}
if (empty($contact['baseurl'])) {
$contact['baseurl'] = 'https://' . substr($addr, strpos($addr, '@') + 1);
Logger::info('Create baseurl from address', ['baseurl' => $contact['baseurl'], 'url' => $contact['url']]);
}
$platform = '';
$gserver = DBA::selectFirst('gserver', ['platform'], ['nurl' => Strings::normaliseLink($contact['baseurl'])]);
if (!empty($gserver['platform'])) {
$platform = strtolower($gserver['platform']);
Logger::info('Detected platform', ['platform' => $platform, 'url' => $contact['url']]);
}
if (!in_array($platform, ['diaspora', 'friendica', 'hubzilla', 'socialhome'])) {
if (self::isHubzilla($contact['url'])) {
Logger::info('Detected unknown platform as Hubzilla', ['platform' => $platform, 'url' => $contact['url']]);
$platform = 'hubzilla';
} elseif ($contact['network'] == Protocol::DFRN) {
Logger::info('Detected unknown platform as Friendica', ['platform' => $platform, 'url' => $contact['url']]);
$platform = 'friendica';
}
}
if ($platform == 'friendica') {
return str_replace('/profile/' . $contact['nick'] . '/', '/display/' . $guid, $contact['url'] . '/');
}
if ($platform == 'hubzilla') {
return $contact['baseurl'] . '/item/' . $guid;
}
if ($platform == 'socialhome') {
return $contact['baseurl'] . '/content/' . $guid;
}
if ($platform != 'diaspora') {
Logger::info('Unknown platform', ['platform' => $platform, 'url' => $contact['url']]);
return '';
}
if ($parent_guid != '') {
return $contact['baseurl'] . '/posts/' . $parent_guid . '#' . $guid;
} else {
return $contact['baseurl'] . '/posts/' . $guid;
}
}
/**
* Receives account migration
*
* @param array $importer Array of the importer user
* @param SimpleXMLElement $data The message object
*
* @return bool Success
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function receiveAccountMigration(array $importer, SimpleXMLElement $data): bool
{
$old_handle = XML::unescape($data->author);
$new_handle = XML::unescape($data->profile->author);
$signature = XML::unescape($data->signature);
$contact = self::contactByHandle($importer['uid'], $old_handle);
if (!$contact) {
Logger::notice('Cannot find contact for sender: ' . $old_handle . ' and user ' . $importer['uid']);
return false;
}
Logger::notice('Got migration for ' . $old_handle . ', to ' . $new_handle . ' with user ' . $importer['uid']);
// Check signature
$signed_text = 'AccountMigration:' . $old_handle . ':' . $new_handle;
$key = self::key($old_handle);
if (!Crypto::rsaVerify($signed_text, $signature, $key, 'sha256')) {
Logger::notice('No valid signature for migration.');
return false;
}
// Update the profile
self::receiveProfile($importer, $data->profile);
// change the technical stuff in contact
$data = Probe::uri($new_handle);
if ($data['network'] == Protocol::PHANTOM) {
Logger::notice("Account for " . $new_handle . " couldn't be probed.");
return false;
}
$fields = [
'url' => $data['url'],
'nurl' => Strings::normaliseLink($data['url']),
'name' => $data['name'],
'nick' => $data['nick'],
'addr' => $data['addr'],
'batch' => $data['batch'],
'notify' => $data['notify'],
'poll' => $data['poll'],
'network' => $data['network'],
];
Contact::update($fields, ['addr' => $old_handle]);
Logger::notice('Contacts are updated.');
return true;
}
/**
* Processes an account deletion
*
* @param SimpleXMLElement $data The message object
*
* @return bool Success
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
private static function receiveAccountDeletion(SimpleXMLElement $data): bool
{
$author = XML::unescape($data->author);
$contacts = DBA::select('contact', ['id'], ['addr' => $author]);
while ($contact = DBA::fetch($contacts)) {
Contact::remove($contact['id']);
}
DBA::close($contacts);
Logger::notice('Removed contacts for ' . $author);
return true;
}
/**
* Fetch the uri from our database if we already have this item (maybe from ourselves)
*
* @param string $author Author handle
* @param string $guid Message guid
* @param boolean $onlyfound Only return uri when found in the database
*
* @return string The constructed uri or the one from our database or empty string on if $onlyfound is true
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function getUriFromGuid(string $author, string $guid, bool $onlyfound = false): string
{
$item = Post::selectFirst(['uri'], ['guid' => $guid]);
if (DBA::isResult($item)) {
return $item['uri'];
} elseif (!$onlyfound) {
$person = FContact::getByURL($author);
$parts = parse_url($person['url']);
unset($parts['path']);
$host_url = (string)Uri::fromParts($parts);
return $host_url . '/objects/' . $guid;
}
return '';
}
/**
* Store the mentions in the tag table
*
* @param integer $uriid
* @param string $text
*/
private static function storeMentions(int $uriid, string $text)
{
preg_match_all('/([@!]){(?:([^}]+?); ?)?([^} ]+)}/', $text, $matches, PREG_SET_ORDER);
if (empty($matches)) {
return;
}
/*
* Matching values for the preg match
* [1] = mention type (@ or !)
* [2] = name (optional)
* [3] = profile URL
*/
foreach ($matches as $match) {
if (empty($match)) {
continue;
}
$person = FContact::getByURL($match[3]);
if (empty($person)) {
continue;
}
Tag::storeByHash($uriid, $match[1], $person['name'] ?: $person['nick'], $person['url']);
}
}
/**
* Processes an incoming comment
*
* @param array $importer Array of the importer user
* @param string $sender The sender of the message
* @param SimpleXMLElement $data The message object
* @param string $xml The original XML of the message
* @param int $direction Indicates if the message had been fetched or pushed (self::PUSHED, self::FETCHED, self::FORCED_FETCH)
*
* @return int The message id of the generated comment or "false" if there was an error
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function receiveComment(array $importer, string $sender, SimpleXMLElement $data, string $xml, int $direction): bool
{
$author = XML::unescape($data->author);
$guid = XML::unescape($data->guid);
$parent_guid = XML::unescape($data->parent_guid);
$text = XML::unescape($data->text);
if (isset($data->created_at)) {
$created_at = DateTimeFormat::utc(XML::unescape($data->created_at));
} else {
$created_at = DateTimeFormat::utcNow();
}
if (isset($data->thread_parent_guid)) {
$thread_parent_guid = XML::unescape($data->thread_parent_guid);
$thr_parent = self::getUriFromGuid('', $thread_parent_guid, true);
} else {
$thr_parent = '';
}
$contact = self::allowedContactByHandle($importer, $sender, true);
if (!$contact) {
return false;
}
if (!empty($contact['gsid'])) {
GServer::setProtocol($contact['gsid'], Post\DeliveryData::DIASPORA);
}
$message_id = self::messageExists($importer['uid'], $guid);
if ($message_id) {
return true;
}
$toplevel_parent_item = self::parentItem($importer['uid'], $parent_guid, $author, $contact);
if (!$toplevel_parent_item) {
return false;
}
$person = FContact::getByURL($author);
if (!is_array($person)) {
Logger::notice('Unable to find author details');
return false;
}
// Fetch the contact id - if we know this contact
$author_contact = self::authorContactByUrl($contact, $person, $importer['uid']);
$datarray = [];
$datarray['uid'] = $importer['uid'];
$datarray['contact-id'] = $author_contact['cid'];
$datarray['network'] = $author_contact['network'];
$datarray['author-link'] = $person['url'];
$datarray['author-id'] = Contact::getIdForURL($person['url'], 0);
$datarray['owner-link'] = $contact['url'];
$datarray['owner-id'] = Contact::getIdForURL($contact['url'], 0);
// Will be overwritten for sharing accounts in Item::insert
$datarray = self::setDirection($datarray, $direction);
$datarray['guid'] = $guid;
$datarray['uri'] = self::getUriFromGuid($author, $guid);
$datarray['uri-id'] = ItemURI::insert(['uri' => $datarray['uri'], 'guid' => $datarray['guid']]);
$datarray['verb'] = Activity::POST;
$datarray['gravity'] = GRAVITY_COMMENT;
$datarray['thr-parent'] = $thr_parent ?: $toplevel_parent_item['uri'];
$datarray['object-type'] = Activity\ObjectType::COMMENT;
$datarray['post-type'] = Item::PT_NOTE;
$datarray['protocol'] = Conversation::PARCEL_DIASPORA;
$datarray['source'] = $xml;
$datarray = self::setDirection($datarray, $direction);
$datarray['changed'] = $datarray['created'] = $datarray['edited'] = $created_at;
$datarray['plink'] = self::plink($author, $guid, $toplevel_parent_item['guid']);
$body = Markdown::toBBCode($text);
$datarray['body'] = self::replacePeopleGuid($body, $person['url']);
self::storeMentions($datarray['uri-id'], $text);
Tag::storeRawTagsFromBody($datarray['uri-id'], $datarray['body']);
self::fetchGuid($datarray);
// If we are the origin of the parent we store the original data.
// We notify our followers during the item storage.
if ($toplevel_parent_item['origin']) {
$datarray['diaspora_signed_text'] = json_encode($data);
}
if (Item::isTooOld($datarray)) {
Logger::info('Comment is too old', ['created' => $datarray['created'], 'uid' => $datarray['uid'], 'guid' => $datarray['guid']]);
return false;
}
$message_id = Item::insert($datarray);
if ($message_id <= 0) {
return false;
}
if ($message_id) {
Logger::info('Stored comment ' . $datarray['guid'] . ' with message id ' . $message_id);
if ($datarray['uid'] == 0) {
Item::distribute($message_id, json_encode($data));
}
}
return true;
}
/**
* processes and stores private messages
*
* @param array $importer Array of the importer user
* @param array $contact The contact of the message
* @param SimpleXMLElement $data The message object
* @param array $msg Array of the processed message, author handle and key
* @param object $mesg The private message
* @param array $conversation The conversation record to which this message belongs
*
* @return bool "true" if it was successful
* @throws \Exception
* @todo Find type-hint for $mesg and update documentation
*/
private static function receiveConversationMessage(array $importer, array $contact, SimpleXMLElement $data, array $msg, $mesg, array $conversation): bool
{
$author = XML::unescape($data->author);
$guid = XML::unescape($data->guid);
$subject = XML::unescape($data->subject);
// "diaspora_handle" is the element name from the old version
// "author" is the element name from the new version
if ($mesg->author) {
$msg_author = XML::unescape($mesg->author);
} elseif ($mesg->diaspora_handle) {
$msg_author = XML::unescape($mesg->diaspora_handle);
} else {
return false;
}
$msg_guid = XML::unescape($mesg->guid);
$msg_conversation_guid = XML::unescape($mesg->conversation_guid);
$msg_text = XML::unescape($mesg->text);
$msg_created_at = DateTimeFormat::utc(XML::unescape($mesg->created_at));
if ($msg_conversation_guid != $guid) {
Logger::notice('Message conversation guid does not belong to the current conversation.', ['guid' => $guid]);
return false;
}
$body = Markdown::toBBCode($msg_text);
$message_uri = $msg_author . ':' . $msg_guid;
$person = FContact::getByURL($msg_author);
return Mail::insert([
'uid' => $importer['uid'],
'guid' => $msg_guid,
'convid' => $conversation['id'],
'from-name' => $person['name'],
'from-photo' => $person['photo'],
'from-url' => $person['url'],
'contact-id' => $contact['id'],
'title' => $subject,
'body' => $body,
'uri' => $message_uri,
'parent-uri' => $author . ':' . $guid,
'created' => $msg_created_at
]);
}
/**
* Processes new private messages (answers to private messages are processed elsewhere)
*
* @param array $importer Array of the importer user
* @param array $msg Array of the processed message, author handle and key
* @param SimpleXMLElement $data The message object
*
* @return bool Success
* @throws \Exception
*/
private static function receiveConversation(array $importer, array $msg, SimpleXMLElement $data)
{
$author = XML::unescape($data->author);
$guid = XML::unescape($data->guid);
$subject = XML::unescape($data->subject);
$created_at = DateTimeFormat::utc(XML::unescape($data->created_at));
$participants = XML::unescape($data->participants);
$messages = $data->message;
if (!count($messages)) {
Logger::notice('Empty conversation');
return false;
}
$contact = self::allowedContactByHandle($importer, $msg['author'], true);
if (!$contact) {
return false;
}
if (!empty($contact['gsid'])) {
GServer::setProtocol($contact['gsid'], Post\DeliveryData::DIASPORA);
}
$conversation = DBA::selectFirst('conv', [], ['uid' => $importer['uid'], 'guid' => $guid]);
if (!DBA::isResult($conversation)) {
$r = DBA::insert('conv', [
'uid' => $importer['uid'],
'guid' => $guid,
'creator' => $author,
'created' => $created_at,
'updated' => DateTimeFormat::utcNow(),
'subject' => $subject,
'recips' => $participants
]);
if ($r) {
$conversation = DBA::selectFirst('conv', [], ['uid' => $importer['uid'], 'guid' => $guid]);
}
}
if (!$conversation) {
Logger::warning('Unable to create conversation.');
return false;
}
foreach ($messages as $mesg) {
self::receiveConversationMessage($importer, $contact, $data, $msg, $mesg, $conversation);
}
return true;
}
/**
* Processes "like" messages
*
* @param array $importer Array of the importer user
* @param string $sender The sender of the message
* @param SimpleXMLElement $data The message object
* @param int $direction Indicates if the message had been fetched or pushed (self::PUSHED, self::FETCHED, self::FORCED_FETCH)
*
* @return bool Success or failure
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function receiveLike(array $importer, string $sender, SimpleXMLElement $data, int $direction): bool
{
$author = XML::unescape($data->author);
$guid = XML::unescape($data->guid);
$parent_guid = XML::unescape($data->parent_guid);
$parent_type = XML::unescape($data->parent_type);
$positive = XML::unescape($data->positive);
// likes on comments aren't supported by Diaspora - only on posts
// But maybe this will be supported in the future, so we will accept it.
if (!in_array($parent_type, ['Post', 'Comment'])) {
return false;
}
$contact = self::allowedContactByHandle($importer, $sender, true);
if (!$contact) {
return false;
}
if (!empty($contact['gsid'])) {
GServer::setProtocol($contact['gsid'], Post\DeliveryData::DIASPORA);
}
$message_id = self::messageExists($importer['uid'], $guid);
if ($message_id) {
return true;
}
$toplevel_parent_item = self::parentItem($importer['uid'], $parent_guid, $author, $contact);
if (!$toplevel_parent_item) {
return false;
}
$person = FContact::getByURL($author);
if (!is_array($person)) {
Logger::notice('Unable to find author details');
return false;
}
// Fetch the contact id - if we know this contact
$author_contact = self::authorContactByUrl($contact, $person, $importer['uid']);
// "positive" = "false" would be a Dislike - wich isn't currently supported by Diaspora
// We would accept this anyhow.
if ($positive == 'true') {
$verb = Activity::LIKE;
} else {
$verb = Activity::DISLIKE;
}
$datarray = [];
$datarray['protocol'] = Conversation::PARCEL_DIASPORA;
$datarray['uid'] = $importer['uid'];
$datarray['contact-id'] = $author_contact['cid'];
$datarray['network'] = $author_contact['network'];
$datarray = self::setDirection($datarray, $direction);
$datarray['owner-link'] = $datarray['author-link'] = $person['url'];
$datarray['owner-id'] = $datarray['author-id'] = Contact::getIdForURL($person['url'], 0);
$datarray['guid'] = $guid;
$datarray['uri'] = self::getUriFromGuid($author, $guid);
$datarray['verb'] = $verb;
$datarray['gravity'] = GRAVITY_ACTIVITY;
$datarray['thr-parent'] = $toplevel_parent_item['uri'];
$datarray['object-type'] = Activity\ObjectType::NOTE;
$datarray['body'] = $verb;
// Diaspora doesn't provide a date for likes
$datarray['changed'] = $datarray['created'] = $datarray['edited'] = DateTimeFormat::utcNow();
// like on comments have the comment as parent. So we need to fetch the toplevel parent
if ($toplevel_parent_item['gravity'] != GRAVITY_PARENT) {
$toplevel = Post::selectFirst(['origin'], ['id' => $toplevel_parent_item['parent']]);
$origin = $toplevel['origin'];
} else {
$origin = $toplevel_parent_item['origin'];
}
// If we are the origin of the parent we store the original data.
// We notify our followers during the item storage.
if ($origin) {
$datarray['diaspora_signed_text'] = json_encode($data);
}
if (Item::isTooOld($datarray)) {
Logger::info('Like is too old', ['created' => $datarray['created'], 'uid' => $datarray['uid'], 'guid' => $datarray['guid']]);
return false;
}
$message_id = Item::insert($datarray);
if ($message_id <= 0) {
return false;
}
if ($message_id) {
Logger::info('Stored like ' . $datarray['guid'] . ' with message id ' . $message_id);
if ($datarray['uid'] == 0) {
Item::distribute($message_id, json_encode($data));
}
}
return true;
}
/**
* Processes private messages
*
* @param array $importer Array of the importer user
* @param SimpleXMLElement $data The message object
*
* @return bool Success?
* @throws \Exception
*/
private static function receiveMessage(array $importer, SimpleXMLElement $data): bool
{
$author = XML::unescape($data->author);
$guid = XML::unescape($data->guid);
$conversation_guid = XML::unescape($data->conversation_guid);
$text = XML::unescape($data->text);
$created_at = DateTimeFormat::utc(XML::unescape($data->created_at));
$contact = self::allowedContactByHandle($importer, $author, true);
if (!$contact) {
return false;
}
if (!empty($contact['gsid'])) {
GServer::setProtocol($contact['gsid'], Post\DeliveryData::DIASPORA);
}
$conversation = null;
$condition = ['uid' => $importer['uid'], 'guid' => $conversation_guid];
$conversation = DBA::selectFirst('conv', [], $condition);
if (!DBA::isResult($conversation)) {
Logger::notice('Conversation not available.');
return false;
}
$message_uri = $author . ':' . $guid;
$person = FContact::getByURL($author);
if (!$person) {
Logger::notice('Unable to find author details');
return false;
}
$body = Markdown::toBBCode($text);
$body = self::replacePeopleGuid($body, $person['url']);
return Mail::insert([
'uid' => $importer['uid'],
'guid' => $guid,
'convid' => $conversation['id'],
'from-name' => $person['name'],
'from-photo' => $person['photo'],
'from-url' => $person['url'],
'contact-id' => $contact['id'],
'title' => $conversation['subject'],
'body' => $body,
'reply' => 1,
'uri' => $message_uri,
'parent-uri' => $author . ':' . $conversation['guid'],
'created' => $created_at
]);
}
/**
* Processes participations - unsupported by now
*
* @param array $importer Array of the importer user
* @param SimpleXMLElement $data The message object
* @param int $direction Indicates if the message had been fetched or pushed (self::PUSHED, self::FETCHED, self::FORCED_FETCH)
*
* @return bool success
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function receiveParticipation(array $importer, SimpleXMLElement $data, int $direction): bool
{
$author = strtolower(XML::unescape($data->author));
$guid = XML::unescape($data->guid);
$parent_guid = XML::unescape($data->parent_guid);
$contact = self::allowedContactByHandle($importer, $author, true);
if (!$contact) {
return false;
}
if (!empty($contact['gsid'])) {
GServer::setProtocol($contact['gsid'], Post\DeliveryData::DIASPORA);
}
if (self::messageExists($importer['uid'], $guid)) {
return true;
}
$toplevel_parent_item = self::parentItem($importer['uid'], $parent_guid, $author, $contact);
if (!$toplevel_parent_item) {
return false;
}
if (!$toplevel_parent_item['origin']) {
Logger::info('Not our origin. Participation is ignored', ['parent_guid' => $parent_guid, 'guid' => $guid, 'author' => $author]);
}
if (!in_array($toplevel_parent_item['private'], [Item::PUBLIC, Item::UNLISTED])) {
Logger::info('Item is not public, participation is ignored', ['parent_guid' => $parent_guid, 'guid' => $guid, 'author' => $author]);
return false;
}
$person = FContact::getByURL($author);
if (!is_array($person)) {
Logger::notice('Person not found: ' . $author);
return false;
}
$author_contact = self::authorContactByUrl($contact, $person, $importer['uid']);
// Store participation
$datarray = [];
$datarray['protocol'] = Conversation::PARCEL_DIASPORA;
$datarray['uid'] = $importer['uid'];
$datarray['contact-id'] = $author_contact['cid'];
$datarray['network'] = $author_contact['network'];
$datarray = self::setDirection($datarray, $direction);
$datarray['owner-link'] = $datarray['author-link'] = $person['url'];
$datarray['owner-id'] = $datarray['author-id'] = Contact::getIdForURL($person['url'], 0);
$datarray['guid'] = $guid;
$datarray['uri'] = self::getUriFromGuid($author, $guid);
$datarray['verb'] = Activity::FOLLOW;
$datarray['gravity'] = GRAVITY_ACTIVITY;
$datarray['thr-parent'] = $toplevel_parent_item['uri'];
$datarray['object-type'] = Activity\ObjectType::NOTE;
$datarray['body'] = Activity::FOLLOW;
// Diaspora doesn't provide a date for a participation
$datarray['changed'] = $datarray['created'] = $datarray['edited'] = DateTimeFormat::utcNow();
if (Item::isTooOld($datarray)) {
Logger::info('Participation is too old', ['created' => $datarray['created'], 'uid' => $datarray['uid'], 'guid' => $datarray['guid']]);
return false;
}
$message_id = Item::insert($datarray);
Logger::info('Participation stored', ['id' => $message_id, 'guid' => $guid, 'parent_guid' => $parent_guid, 'author' => $author]);
// Send all existing comments and likes to the requesting server
$comments = Post::select(['id', 'uri-id', 'parent-author-network', 'author-network', 'verb'],
['parent' => $toplevel_parent_item['id'], 'gravity' => [GRAVITY_COMMENT, GRAVITY_ACTIVITY]]);
while ($comment = Post::fetch($comments)) {
if (in_array($comment['verb'], [Activity::FOLLOW, Activity::TAG])) {
Logger::info('participation messages are not relayed', ['item' => $comment['id']]);
continue;
}
if ($comment['author-network'] == Protocol::ACTIVITYPUB) {
Logger::info('Comments from ActivityPub authors are not relayed', ['item' => $comment['id']]);
continue;
}
if ($comment['parent-author-network'] == Protocol::ACTIVITYPUB) {
Logger::info('Comments to comments from ActivityPub authors are not relayed', ['item' => $comment['id']]);
continue;
}
Logger::info('Deliver participation', ['item' => $comment['id'], 'contact' => $author_contact['cid']]);
if (Worker::add(PRIORITY_HIGH, 'Delivery', Delivery::POST, $comment['id'], $author_contact['cid'])) {
Post\DeliveryData::incrementQueueCount($comment['uri-id'], 1);
}
}
DBA::close($comments);
return true;
}
/**
* Processes photos - unneeded
*
* @param array $importer Array of the importer user
* @param SimpleXMLElement $data The message object
*
* @return bool always true
*/
private static function receivePhoto(array $importer, $data)
{
// There doesn't seem to be a reason for this function,
// since the photo data is transmitted in the status message as well
return true;
}
/**
* Processes poll participations - unssupported
*
* @param array $importer Array of the importer user
* @param object $data The message object
*
* @return bool always true
*/
private static function receivePollParticipation(array $importer, $data)
{
// We don't support polls by now
return true;
}
/**
* Processes incoming profile updates
*
* @param array $importer Array of the importer user
* @param SimpleXMLElement $data The message object
*
* @return bool Success
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function receiveProfile(array $importer, SimpleXMLElement $data): bool
{
$author = strtolower(XML::unescape($data->author));
$contact = self::contactByHandle($importer['uid'], $author);
if (!$contact) {
return false;
}
$name = XML::unescape($data->first_name).((strlen($data->last_name)) ? ' ' . XML::unescape($data->last_name) : '');
$image_url = XML::unescape($data->image_url);
$birthday = XML::unescape($data->birthday);
$about = Markdown::toBBCode(XML::unescape($data->bio));
$location = Markdown::toBBCode(XML::unescape($data->location));
$searchable = (XML::unescape($data->searchable) == 'true');
$nsfw = (XML::unescape($data->nsfw) == 'true');
$tags = XML::unescape($data->tag_string);
$tags = explode('#', $tags);
$keywords = [];
foreach ($tags as $tag) {
$tag = trim(strtolower($tag));
if ($tag != '') {
$keywords[] = $tag;
}
}
$keywords = implode(', ', $keywords);
$handle_parts = explode('@', $author);
$nick = $handle_parts[0];
if ($name === '') {
$name = $handle_parts[0];
}
if (preg_match('|^https?://|', $image_url) === 0) {
// @TODO No HTTPS here?
$image_url = 'http://' . $handle_parts[1] . $image_url;
}
Contact::updateAvatar($contact['id'], $image_url);
// Generic birthday. We don't know the timezone. The year is irrelevant.
$birthday = str_replace('1000', '1901', $birthday);
if ($birthday != '') {
$birthday = DateTimeFormat::utc($birthday, 'Y-m-d');
}
// this is to prevent multiple birthday notifications in a single year
// if we already have a stored birthday and the 'm-d' part hasn't changed, preserve the entry, which will preserve the notify year
if (substr($birthday, 5) === substr($contact['bd'], 5)) {
$birthday = $contact['bd'];
}
$fields = ['name' => $name, 'location' => $location,
'name-date' => DateTimeFormat::utcNow(), 'about' => $about,
'addr' => $author, 'nick' => $nick, 'keywords' => $keywords,
'unsearchable' => !$searchable, 'sensitive' => $nsfw];
if (!empty($birthday)) {
$fields['bd'] = $birthday;
}
Contact::update($fields, ['id' => $contact['id']]);
Logger::info('Profile of contact ' . $contact['id'] . ' stored for user ' . $importer['uid']);
return true;
}
/**
* Processes incoming friend requests
*
* @param array $importer Array of the importer user
* @param array $contact The contact that send the request
* @return void
* @throws \Exception
*/
private static function receiveRequestMakeFriend(array $importer, array $contact)
{
if ($contact['rel'] == Contact::SHARING) {
Contact::update(
['rel' => Contact::FRIEND, 'writable' => true],
['id' => $contact['id'], 'uid' => $importer['uid']]
);
}
}
/**
* Processes incoming sharing notification
*
* @param array $importer Array of the importer user
* @param SimpleXMLElement $data The message object
*
* @return bool Success
* @throws \Exception
*/
private static function receiveContactRequest(array $importer, SimpleXMLElement $data): bool
{
$author = XML::unescape($data->author);
$recipient = XML::unescape($data->recipient);
if (!$author || !$recipient) {
return false;
}
// the current protocol version doesn't know these fields
// That means that we will assume their existance
if (isset($data->following)) {
$following = (XML::unescape($data->following) == 'true');
} else {
$following = true;
}
if (isset($data->sharing)) {
$sharing = (XML::unescape($data->sharing) == 'true');
} else {
$sharing = true;
}
$contact = self::contactByHandle($importer['uid'], $author);
// perhaps we were already sharing with this person. Now they're sharing with us.
// That makes us friends.
if ($contact) {
if ($following) {
Logger::info('Author ' . $author . ' (Contact ' . $contact['id'] . ') wants to follow us.');
self::receiveRequestMakeFriend($importer, $contact);
// refetch the contact array
$contact = self::contactByHandle($importer['uid'], $author);
// If we are now friends, we are sending a share message.
// Normally we needn't to do so, but the first message could have been vanished.
if (in_array($contact['rel'], [Contact::FRIEND])) {
$user = DBA::selectFirst('user', [], ['uid' => $importer['uid']]);
if (DBA::isResult($user)) {
Logger::info('Sending share message to author ' . $author . ' - Contact: ' . $contact['id'] . ' - User: ' . $importer['uid']);
self::sendShare($user, $contact);
}
}
return true;
} else {
Logger::info("Author " . $author . " doesn't want to follow us anymore.");
Contact::removeFollower($contact);
return true;
}
}
if (!$following && $sharing && in_array($importer['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_NORMAL])) {
Logger::info("Author " . $author . " wants to share with us - but doesn't want to listen. Request is ignored.");
return false;
} elseif (!$following && !$sharing) {
Logger::info("Author " . $author . " doesn't want anything - and we don't know the author. Request is ignored.");
return false;
} elseif (!$following && $sharing) {
Logger::info("Author " . $author . " wants to share with us.");
} elseif ($following && $sharing) {
Logger::info("Author " . $author . " wants to have a bidirectional conection.");
} elseif ($following && !$sharing) {
Logger::info("Author " . $author . " wants to listen to us.");
}
$ret = FContact::getByURL($author);
if (!$ret || ($ret['network'] != Protocol::DIASPORA)) {
Logger::notice("Cannot resolve diaspora handle " . $author . " for ".$recipient);
return false;
}
$cid = Contact::getIdForURL($ret['url'], $importer['uid']);
if (!empty($cid)) {
$contact = DBA::selectFirst('contact', [], ['id' => $cid, 'network' => Protocol::NATIVE_SUPPORT]);
} else {
$contact = [];
}
$item = ['author-id' => Contact::getIdForURL($ret['url']),
'author-link' => $ret['url']];
$result = Contact::addRelationship($importer, $contact, $item, false);
if ($result === true) {
$contact_record = self::contactByHandle($importer['uid'], $author);
if (!$contact_record) {
Logger::info('unable to locate newly created contact record.');
return false;
}
$user = DBA::selectFirst('user', [], ['uid' => $importer['uid']]);
if (DBA::isResult($user)) {
self::sendShare($user, $contact_record);
// Send the profile data, maybe it weren't transmitted before
self::sendProfile($importer['uid'], [$contact_record]);
}
}
return true;
}
/**
* Fetches a message with a given guid
*
* @param string $guid message guid
* @param string $orig_author handle of the original post
* @return array|bool The fetched item or false on failure
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
public static function originalItem(string $guid, string $orig_author)
{
if (empty($guid)) {
Logger::notice('Empty guid. Quitting.');
return false;
}
// Do we already have this item?
$fields = ['body', 'title', 'app', 'created', 'object-type', 'uri', 'guid',
'author-name', 'author-link', 'author-avatar', 'plink', 'uri-id'];
$condition = ['guid' => $guid, 'visible' => true, 'deleted' => false, 'private' => [Item::PUBLIC, Item::UNLISTED]];
$item = Post::selectFirst($fields, $condition);
if (DBA::isResult($item)) {
Logger::notice("reshared message " . $guid . " already exists on system.");
// Maybe it is already a reshared item?
// Then refetch the content, if it is a reshare from a reshare.
// If it is a reshared post from another network then reformat to avoid display problems with two share elements
if (self::isReshare($item['body'], true)) {
$item = [];
} elseif (self::isReshare($item['body'], false) || strstr($item['body'], '[share')) {
$item['body'] = Markdown::toBBCode(BBCode::toMarkdown($item['body']));
$item['body'] = self::replacePeopleGuid($item['body'], $item['author-link']);
return $item;
} else {
return $item;
}
}
if (!DBA::isResult($item)) {
if (empty($orig_author)) {
Logger::notice('Empty author for guid ' . $guid . '. Quitting.');
return false;
}
$server = 'https://' . substr($orig_author, strpos($orig_author, '@') + 1);
Logger::notice('1st try: reshared message ' . $guid . ' will be fetched via SSL from the server ' . $server);
$stored = self::storeByGuid($guid, $server, true);
if (!$stored) {
$server = 'http://' . substr($orig_author, strpos($orig_author, '@') + 1);
Logger::notice('2nd try: reshared message ' . $guid . ' will be fetched without SSL from the server ' . $server);
$stored = self::storeByGuid($guid, $server, true);
}
if ($stored) {
$fields = ['body', 'title', 'app', 'created', 'object-type', 'uri', 'guid',
'author-name', 'author-link', 'author-avatar', 'plink', 'uri-id'];
$condition = ['guid' => $guid, 'visible' => true, 'deleted' => false, 'private' => [Item::PUBLIC, Item::UNLISTED]];
$item = Post::selectFirst($fields, $condition);
if (DBA::isResult($item)) {
// If it is a reshared post from another network then reformat to avoid display problems with two share elements
if (self::isReshare($item['body'], false)) {
$item['body'] = Markdown::toBBCode(BBCode::toMarkdown($item['body']));
$item['body'] = self::replacePeopleGuid($item['body'], $item['author-link']);
}
return $item;
}
}
}
return false;
}
/**
* Stores a reshare activity
*
* @param array $item Array of reshare post
* @param integer $parent_message_id Id of the parent post
* @param string $guid GUID string of reshare action
* @param string $author Author handle
*/
private static function addReshareActivity(array $item, int $parent_message_id, string $guid, string $author)
{
$parent = Post::selectFirst(['uri', 'guid'], ['id' => $parent_message_id]);
$datarray = [];
$datarray['uid'] = $item['uid'];
$datarray['contact-id'] = $item['contact-id'];
$datarray['network'] = $item['network'];
$datarray['author-link'] = $item['author-link'];
$datarray['author-id'] = $item['author-id'];
$datarray['owner-link'] = $datarray['author-link'];
$datarray['owner-id'] = $datarray['author-id'];
$datarray['guid'] = $parent['guid'] . '-' . $guid;
$datarray['uri'] = self::getUriFromGuid($author, $datarray['guid']);
$datarray['thr-parent'] = $parent['uri'];
$datarray['verb'] = $datarray['body'] = Activity::ANNOUNCE;
$datarray['gravity'] = GRAVITY_ACTIVITY;
$datarray['object-type'] = Activity\ObjectType::NOTE;
$datarray['protocol'] = $item['protocol'];
$datarray['source'] = $item['source'];
$datarray['direction'] = $item['direction'];
$datarray['post-reason'] = $item['post-reason'];
$datarray['plink'] = self::plink($author, $datarray['guid']);
$datarray['private'] = $item['private'];
$datarray['changed'] = $datarray['created'] = $datarray['edited'] = $item['created'];
if (Item::isTooOld($datarray)) {
Logger::info('Reshare activity is too old', ['created' => $datarray['created'], 'uid' => $datarray['uid'], 'guid' => $datarray['guid']]);
return false;
}
$message_id = Item::insert($datarray);
if ($message_id) {
Logger::info('Stored reshare activity.', ['guid' => $guid, 'id' => $message_id]);
if ($datarray['uid'] == 0) {
Item::distribute($message_id);
}
}
}
/**
* Processes a reshare message
*
* @param array $importer Array of the importer user
* @param SimpleXMLElement $data The message object
* @param string $xml The original XML of the message
* @param int $direction Indicates if the message had been fetched or pushed (self::PUSHED, self::FETCHED, self::FORCED_FETCH)
*
* @return bool Success or failure
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function receiveReshare(array $importer, SimpleXMLElement $data, string $xml, int $direction): bool
{
$author = XML::unescape($data->author);
$guid = XML::unescape($data->guid);
$created_at = DateTimeFormat::utc(XML::unescape($data->created_at));
$root_author = XML::unescape($data->root_author);
$root_guid = XML::unescape($data->root_guid);
/// @todo handle unprocessed property "provider_display_name"
$public = XML::unescape($data->public);
$contact = self::allowedContactByHandle($importer, $author, false);
if (!$contact) {
return false;
}
if (!empty($contact['gsid'])) {
GServer::setProtocol($contact['gsid'], Post\DeliveryData::DIASPORA);
}
$message_id = self::messageExists($importer['uid'], $guid);
if ($message_id) {
return true;
}
$original_item = self::originalItem($root_guid, $root_author);
if (!$original_item) {
return false;
}
if (empty($original_item['plink'])) {
$original_item['plink'] = self::plink($root_author, $root_guid);
}
$datarray = [];
$datarray['uid'] = $importer['uid'];
$datarray['contact-id'] = $contact['id'];
$datarray['network'] = Protocol::DIASPORA;
$datarray['author-link'] = $contact['url'];
$datarray['author-id'] = Contact::getIdForURL($contact['url'], 0);
$datarray['owner-link'] = $datarray['author-link'];
$datarray['owner-id'] = $datarray['author-id'];
$datarray['guid'] = $guid;
$datarray['uri'] = $datarray['thr-parent'] = self::getUriFromGuid($author, $guid);
$datarray['uri-id'] = ItemURI::insert(['uri' => $datarray['uri'], 'guid' => $datarray['guid']]);
$datarray['verb'] = Activity::POST;
$datarray['gravity'] = GRAVITY_PARENT;
$datarray['protocol'] = Conversation::PARCEL_DIASPORA;
$datarray['source'] = $xml;
$datarray = self::setDirection($datarray, $direction);
/// @todo Copy tag data from original post
$prefix = BBCode::getShareOpeningTag(
$original_item['author-name'],
$original_item['author-link'],
$original_item['author-avatar'],
$original_item['plink'],
$original_item['created'],
$original_item['guid']
);
if (!empty($original_item['title'])) {
$prefix .= '[h3]' . $original_item['title'] . "[/h3]\n";
}
$datarray['body'] = $prefix.$original_item['body'] . '[/share]';
Tag::storeFromBody($datarray['uri-id'], $datarray['body']);
$datarray['app'] = $original_item['app'];
$datarray['plink'] = self::plink($author, $guid);
$datarray['private'] = (($public == 'false') ? Item::PRIVATE : Item::PUBLIC);
$datarray['changed'] = $datarray['created'] = $datarray['edited'] = $created_at;
$datarray['object-type'] = $original_item['object-type'];
self::fetchGuid($datarray);
if (Item::isTooOld($datarray)) {
Logger::info('Reshare is too old', ['created' => $datarray['created'], 'uid' => $datarray['uid'], 'guid' => $datarray['guid']]);
return false;
}
$message_id = Item::insert($datarray);
self::sendParticipation($contact, $datarray);
$root_message_id = self::messageExists($importer['uid'], $root_guid);
if ($root_message_id) {
self::addReshareActivity($datarray, $root_message_id, $guid, $author);
}
if ($message_id) {
Logger::info('Stored reshare ' . $datarray['guid'] . ' with message id ' . $message_id);
if ($datarray['uid'] == 0) {
Item::distribute($message_id);
}
return true;
} else {
return false;
}
}
/**
* Processes retractions
*
* @param array $importer Array of the importer user
* @param array $contact The contact of the item owner
* @param SimpleXMLElement $data The message object
*
* @return bool success
* @throws \Exception
*/
private static function itemRetraction(array $importer, array $contact, SimpleXMLElement $data): bool
{
$author = XML::unescape($data->author);
$target_guid = XML::unescape($data->target_guid);
$target_type = XML::unescape($data->target_type);
$person = FContact::getByURL($author);
if (!is_array($person)) {
Logger::notice('Unable to find author detail for ' . $author);
return false;
}
if (empty($contact['url'])) {
$contact['url'] = $person['url'];
}
// Fetch items that are about to be deleted
$fields = ['uid', 'id', 'parent', 'author-link', 'uri-id'];
// When we receive a public retraction, we delete every item that we find.
if ($importer['uid'] == 0) {
$condition = ['guid' => $target_guid, 'deleted' => false];
} else {
$condition = ['guid' => $target_guid, 'deleted' => false, 'uid' => $importer['uid']];
}
$r = Post::select($fields, $condition);
if (!DBA::isResult($r)) {
Logger::notice('Target guid ' . $target_guid . ' was not found on this system for user ' . $importer['uid'] . '.');
return false;
}
while ($item = Post::fetch($r)) {
if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
Logger::info("Target guid " . $target_guid . " for user " . $item['uid'] . " is filed. So it won't be deleted.");
continue;
}
// Fetch the parent item
$parent = Post::selectFirst(['author-link'], ['id' => $item['parent']]);
// Only delete it if the parent author really fits
if (!Strings::compareLink($parent['author-link'], $contact['url']) && !Strings::compareLink($item['author-link'], $contact['url'])) {
Logger::info("Thread author " . $parent['author-link'] . " and item author " . $item['author-link'] . " don't fit to expected contact " . $contact['url']);
continue;
}
Item::markForDeletion(['id' => $item['id']]);
Logger::info('Deleted target ' . $target_guid . ' (' . $item['id'] . ') from user ' . $item['uid'] . ' parent: ' . $item['parent']);
}
DBA::close($r);
return true;
}
/**
* Receives retraction messages
*
* @param array $importer Array of the importer user
* @param string $sender The sender of the message
* @param SimpleXMLElement $data The message object
*
* @return bool Success
* @throws \Exception
*/
private static function receiveRetraction(array $importer, string $sender, SimpleXMLElement $data)
{
$target_type = XML::unescape($data->target_type);
$contact = self::contactByHandle($importer['uid'], $sender);
if (!$contact && (in_array($target_type, ['Contact', 'Person']))) {
Logger::notice('Cannot find contact for sender: ' . $sender . ' and user ' . $importer['uid']);
return false;
}
if (!$contact) {
$contact = [];
}
Logger::info('Got retraction for ' . $target_type . ', sender ' . $sender . ' and user ' . $importer['uid']);
switch ($target_type) {
case 'Comment':
case 'Like':
case 'Post':
case 'Reshare':
case 'StatusMessage':
return self::itemRetraction($importer, $contact, $data);
case 'PollParticipation':
case 'Photo':
// Currently unsupported
break;
default:
Logger::notice('Unknown target type ' . $target_type);
return false;
}
return true;
}
/**
* Checks if an incoming message is wanted
*
* @param array $item
* @param string $author
* @param string $body
* @param int $direction Indicates if the message had been fetched or pushed (self::PUSHED, self::FETCHED, self::FORCED_FETCH)
*
* @return boolean Is the message wanted?
*/
private static function isSolicitedMessage(array $item, string $author, string $body, int $direction): bool
{
$contact = Contact::getByURL($author);
if (DBA::exists('contact', ['`nurl` = ? AND `uid` != ? AND `rel` IN (?, ?)', $contact['nurl'], 0, Contact::FRIEND, Contact::SHARING])) {
Logger::debug('Author has got followers - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri'], 'author' => $author]);
return true;
}
if ($direction == self::FORCED_FETCH) {
Logger::debug('Post is a forced fetch - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri'], 'author' => $author]);
return true;
}
$tags = array_column(Tag::getByURIId($item['uri-id'], [Tag::HASHTAG]), 'name');
if (Relay::isSolicitedPost($tags, $body, $contact['id'], $item['uri'], Protocol::DIASPORA)) {
Logger::debug('Post is accepted because of the relay settings', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri'], 'author' => $author]);
return true;
} else {
return false;
}
}
/**
* Store an attached photo in the post-media table
*
* @param int $uriid
* @param object $photo
* @return void
*/
private static function storePhotoAsMedia(int $uriid, $photo)
{
// @TODO Need to find object type, roland@f.haeder.net
Logger::debug('photo='.get_class($photo));
$data = [];
$data['uri-id'] = $uriid;
$data['type'] = Post\Media::IMAGE;
$data['url'] = XML::unescape($photo->remote_photo_path) . XML::unescape($photo->remote_photo_name);
$data['height'] = (int)XML::unescape($photo->height ?? 0);
$data['width'] = (int)XML::unescape($photo->width ?? 0);
$data['description'] = XML::unescape($photo->text ?? '');
Post\Media::insert($data);
}
/**
* Set direction and post reason
*
* @param array $datarray
* @param integer $direction
*
* @return array
*/
public static function setDirection(array $datarray, int $direction): array
{
$datarray['direction'] = in_array($direction, [self::FETCHED, self::FORCED_FETCH]) ? Conversation::PULL : Conversation::PUSH;
if (in_array($direction, [self::FETCHED, self::FORCED_FETCH])) {
$datarray['post-reason'] = Item::PR_FETCHED;
} elseif ($datarray['uid'] == 0) {
$datarray['post-reason'] = Item::PR_GLOBAL;
} else {
$datarray['post-reason'] = Item::PR_PUSHED;
}
return $datarray;
}
/**
* Receives status messages
*
* @param array $importer Array of the importer user
* @param SimpleXMLElement $data The message object
* @param string $xml The original XML of the message
* @param int $direction Indicates if the message had been fetched or pushed (self::PUSHED, self::FETCHED, self::FORCED_FETCH)
*
* @return int|bool The message id of the newly created item or false on error
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function receiveStatusMessage(array $importer, SimpleXMLElement $data, string $xml, int $direction)
{
$author = XML::unescape($data->author);
$guid = XML::unescape($data->guid);
$created_at = DateTimeFormat::utc(XML::unescape($data->created_at));
$public = XML::unescape($data->public);
$text = XML::unescape($data->text);