Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
/**
* @file src/Protocol/diaspora.php
* @brief The implementation of the diaspora protocol
*
* The new protocol is described here: http://diaspora.github.io/diaspora_federation/index.html
* This implementation here interprets the old and the new protocol and sends the new one.
* In the future we will remove most stuff from "validPosting" and interpret only the new protocol.
*/
namespace Friendica\Protocol;
use Friendica\Content\Feature;
use Friendica\Content\Text\BBCode;
use Friendica\Content\Text\Markdown;
use Friendica\Core\Cache\Cache;
use Friendica\Core\Config;
use Friendica\Core\L10n;
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\GContact;
use Friendica\Model\Item;
use Friendica\Model\ItemDeliveryData;
use Friendica\Model\Mail;
use Friendica\Model\Profile;
use Friendica\Model\User;
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 SimpleXMLElement;
/**
* @brief This class contain functions to create and send Diaspora XML files
*
*/
class Diaspora
{
/**
* Mark the relay contact of the given contact for archival
* This is called whenever there is a communication issue with the server.
* It avoids sending stuff to servers who don't exist anymore.
* The relay contact is a technical contact entry that exists once per server.
*
* @param array $contact of the relay contact
*/
public static function markRelayForArchival(array $contact)
{
if (!empty($contact['contact-type']) && ($contact['contact-type'] == Contact::TYPE_RELAY)) {
// This is already the relay contact, we don't need to fetch it
$relay_contact = $contact;
} elseif (empty($contact['baseurl'])) {
if (!empty($contact['batch'])) {
$condition = ['uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => Contact::TYPE_RELAY];
$relay_contact = DBA::selectFirst('contact', [], $condition);
} else {
return;
}
} else {
$relay_contact = self::getRelayContact($contact['baseurl'], []);
}
if (!empty($relay_contact)) {
Logger::info('Relay contact will be marked for archival', ['id' => $relay_contact['id'], 'url' => $relay_contact['url']]);
Contact::markForArchival($relay_contact);
}
}
/**
* @brief Return a list of relay servers
*
* The list contains not only the official relays but also servers that we serve directly
*
* @param integer $item_id The id of the item that is sent
* @param array $contacts The previously fetched contacts
*
* @return array of relay servers
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
public static function relayList($item_id, array $contacts = [])
{
$serverlist = [];
// Fetching relay servers
$serverdata = Config::get("system", "relay_server");
if (!empty($serverdata)) {
$servers = explode(",", $serverdata);
foreach ($servers as $server) {
$serverlist[$server] = trim($server);
}
}
if (Config::get("system", "relay_directly", false)) {
// We distribute our stuff based on the parent to ensure that the thread will be complete
$parent = Item::selectFirst(['parent'], ['id' => $item_id]);
if (!DBA::isResult($parent)) {
return;
}
// Servers that want to get all content
$servers = DBA::select('gserver', ['url'], ['relay-subscribe' => true, 'relay-scope' => 'all']);
while ($server = DBA::fetch($servers)) {
$serverlist[$server['url']] = $server['url'];
}
// All tags of the current post
$condition = ['otype' => TERM_OBJ_POST, 'type' => TERM_HASHTAG, 'oid' => $parent['parent']];
$tags = DBA::select('term', ['term'], $condition);
$taglist = [];
while ($tag = DBA::fetch($tags)) {
$taglist[] = $tag['term'];
}
// All servers who wants content with this tag
$tagserverlist = [];
if (!empty($taglist)) {
$tagserver = DBA::select('gserver-tag', ['gserver-id'], ['tag' => $taglist]);
while ($server = DBA::fetch($tagserver)) {
$tagserverlist[] = $server['gserver-id'];
}
}
// All adresses with the given id
if (!empty($tagserverlist)) {
$servers = DBA::select('gserver', ['url'], ['relay-subscribe' => true, 'relay-scope' => 'tags', 'id' => $tagserverlist]);
while ($server = DBA::fetch($servers)) {
$serverlist[$server['url']] = $server['url'];
}
}
}
// Now we are collecting all relay contacts
foreach ($serverlist as $server_url) {
// We don't send messages to ourselves
if (Strings::compareLink($server_url, DI::baseUrl())) {
continue;
}
$contact = self::getRelayContact($server_url);
if (is_bool($contact)) {
continue;
}
$exists = false;
foreach ($contacts as $entry) {
if ($entry['batch'] == $contact['batch']) {
$exists = true;
}
}
if (!$exists) {
$contacts[] = $contact;
}
}
return $contacts;
}
/**
* @brief Return a contact for a given server address or creates a dummy entry
*
* @param string $server_url The url of the server
* @param array $fields Fieldlist
* @return array with the contact
* @throws \Exception
*/
private static function getRelayContact(string $server_url, array $fields = ['batch', 'id', 'url', 'name', 'network', 'protocol', 'archive', 'blocked'])
{
// Fetch the relay contact
$condition = ['uid' => 0, 'nurl' => Strings::normaliseLink($server_url),
'contact-type' => Contact::TYPE_RELAY];
$contact = DBA::selectFirst('contact', $fields, $condition);
if (DBA::isResult($contact)) {
if ($contact['archive'] || $contact['blocked']) {
return false;
}
return $contact;
} else {
self::setRelayContact($server_url);
$contact = DBA::selectFirst('contact', $fields, $condition);
if (DBA::isResult($contact)) {
return $contact;
}
}
// It should never happen that we arrive here
return [];
}
/**
* @brief Update or insert a relay contact
*
* @param string $server_url The url of the server
* @param array $network_fields Optional network specific fields
* @throws \Exception
*/
public static function setRelayContact($server_url, array $network_fields = [])
{
$fields = ['created' => DateTimeFormat::utcNow(),
'name' => 'relay', 'nick' => 'relay', 'url' => $server_url,
'nurl' => Strings::normaliseLink($server_url),
'network' => Protocol::DIASPORA, 'uid' => 0,
'batch' => $server_url . '/receive/public',
'rel' => Contact::FOLLOWER, 'blocked' => false,
'pending' => false, 'writable' => true,
'baseurl' => $server_url, 'contact-type' => Contact::TYPE_RELAY];
$fields = array_merge($fields, $network_fields);
$condition = ['uid' => 0, 'nurl' => Strings::normaliseLink($server_url)];
$old = DBA::selectFirst('contact', [], $condition);
if (DBA::isResult($old)) {
unset($fields['created']);
$condition = ['id' => $old['id']];
Logger::info('Update relay contact', ['fields' => $fields, 'condition' => $condition]);
DBA::update('contact', $fields, $condition, $old);
} else {
Logger::info('Create relay contact', ['fields' => $fields]);
Contact::insert($fields);
}
}
/**
* @brief 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 integer $thread The id of the thread
* @param array $contacts The previously fetched contacts
*
* @return array of relay servers
* @throws \Exception
*/
public static function participantsForThread($thread, array $contacts)
{
$r = DBA::p("SELECT `contact`.`batch`, `contact`.`id`, `contact`.`url`, `contact`.`name`, `contact`.`network`, `contact`.`protocol`,
`fcontact`.`batch` AS `fbatch`, `fcontact`.`network` AS `fnetwork` FROM `participation`
INNER JOIN `contact` ON `contact`.`id` = `participation`.`cid`
INNER JOIN `fcontact` ON `fcontact`.`id` = `participation`.`fid`
WHERE `participation`.`iid` = ? AND NOT `contact`.`archive`", $thread);
while ($contact = DBA::fetch($r)) {
if (!empty($contact['fnetwork'])) {
$contact['network'] = $contact['fnetwork'];
}
unset($contact['fnetwork']);
if (empty($contact['protocol'])) {
$contact['protocol'] = $contact['network'];
}
if (empty($contact['batch']) && !empty($contact['fbatch'])) {
$contact['batch'] = $contact['fbatch'];
}
unset($contact['fbatch']);
$exists = false;
foreach ($contacts as $entry) {
if ($entry['batch'] == $contact['batch']) {
$exists = true;
}
}
if (!$exists) {
$contacts[] = $contact;
}
}
DBA::close($r);
return $contacts;
}
/**
* @brief repairs a signature that was double encoded
*
* The function is unused at the moment. It was copied from the old implementation.
*
* @param string $signature The signature
* @param string $handle The handle of the signature owner
* @param integer $level This value is only set inside this function to avoid endless loops
*
* @return string the repaired signature
* @throws \Exception
*/
private static function repairSignature($signature, $handle = "", $level = 1)
{
if ($signature == "") {
return ($signature);
}
if (base64_encode(base64_decode(base64_decode($signature))) == base64_decode($signature)) {
$signature = base64_decode($signature);
Logger::log("Repaired double encoded signature from Diaspora/Hubzilla handle ".$handle." - level ".$level, Logger::DEBUG);
// Do a recursive call to be able to fix even multiple levels
if ($level < 10) {
$signature = self::repairSignature($signature, $handle, ++$level);
}
}
return($signature);
}
/**
* @brief verify the envelope and return the verified data
*
* @param string $envelope The magic envelope
*
* @return string verified data
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function verifyMagicEnvelope($envelope)
{
$basedom = XML::parseString($envelope);
if (!is_object($basedom)) {
Logger::log("Envelope is no XML file");
return false;
}
$children = $basedom->children('http://salmon-protocol.org/ns/magic-env');
if (sizeof($children) == 0) {
Logger::log("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::log('No author could be decoded. Discarding. Message: ' . $envelope);
return false;
}
$key = self::key($handle);
if ($key == '') {
Logger::log("Couldn't get a key for handle " . $handle . ". Discarding.");
return false;
}
$verify = Crypto::rsaVerify($signable_data, $sig, $key);
if (!$verify) {
Logger::log('Message from ' . $handle . ' did not verify. Discarding.');
return false;
}
return $data;
}
/**
* @brief encrypts data via AES
*
* @param string $key The AES key
* @param string $iv The IV (is used for CBC encoding)
* @param string $data The data that is to be encrypted
*
* @return string encrypted data
*/
private static function aesEncrypt($key, $iv, $data)
{
return openssl_encrypt($data, 'aes-256-cbc', str_pad($key, 32, "\0"), OPENSSL_RAW_DATA, str_pad($iv, 16, "\0"));
}
/**
* @brief decrypts data via AES
*
* @param string $key The AES key
* @param string $iv The IV (is used for CBC encoding)
* @param string $encrypted The encrypted data
*
* @return string decrypted data
*/
private static function aesDecrypt($key, $iv, $encrypted)
{
return openssl_decrypt($encrypted, 'aes-256-cbc', str_pad($key, 32, "\0"), OPENSSL_RAW_DATA, str_pad($iv, 16, "\0"));
}
/**
* @brief: Decodes incoming Diaspora message in the new format
*
* @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 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($j_outer_key_bundle)) {
Logger::log('Outer Salmon did not verify. Discarding.');
if ($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);
if (!is_object($basedom)) {
Logger::log('Received data does not seem to be an XML. Discarding. '.$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::log('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::log("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::log('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];
}
/**
* @brief: 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::log("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::log("This is no private post in the old format", Logger::DEBUG);
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, $ciphertext);
Logger::log('decrypted: '.$decrypted, Logger::DEBUG);
$idom = XML::parseString($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::log('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::log('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::log('Fetching key for '.$author_link);
$key = self::key($author_link);
if (!$key) {
Logger::log('Could not retrieve author key.');
throw new \Friendica\Network\HTTPException\BadRequestException();
}
$verify = Crypto::rsaVerify($signed_data, $signature, $key);
if (!$verify) {
Logger::log('Message did not verify. Discarding.');
throw new \Friendica\Network\HTTPException\BadRequestException();
}
Logger::log('Message verified.');
return ['message' => (string)$inner_decrypted,
'author' => XML::unescape($author_link),
'key' => (string)$key];
}
/**
* @brief Dispatches public messages and find the fitting receivers
*
* @param array $msg The post that will be dispatched
*
* @return int The message id of the generated message, "true" or "false" if there was an error
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
public static function dispatchPublic($msg)
{
$enabled = intval(Config::get("system", "diaspora_enabled"));
if (!$enabled) {
Logger::log("diaspora is disabled");
return false;
}
if (!($fields = self::validPosting($msg))) {
Logger::log("Invalid posting");
return false;
}
$importer = ["uid" => 0, "page-flags" => User::PAGE_FLAGS_FREELOVE];
$success = self::dispatch($importer, $msg, $fields);
return $success;
}
/**
* @brief 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
*
* @return int 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, $msg, SimpleXMLElement $fields = null)
{
// 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::log("Invalid posting");
return false;
}
} else {
$private = false;
}
$type = $fields->getName();
Logger::log("Received message type ".$type." from ".$sender." for user ".$importer["uid"], Logger::DEBUG);
switch ($type) {
case "account_migration":
if (!$private) {
Logger::log('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, $msg["message"]);
case "contact":
if (!$private) {
Logger::log('Message with type ' . $type . ' is not private, quitting.');
return false;
}
return self::receiveContactRequest($importer, $fields);
case "conversation":
if (!$private) {
Logger::log('Message with type ' . $type . ' is not private, quitting.');
return false;
}
return self::receiveConversation($importer, $msg, $fields);
case "like":
return self::receiveLike($importer, $sender, $fields);
case "message":
if (!$private) {
Logger::log('Message with type ' . $type . ' is not private, quitting.');
return false;
}
return self::receiveMessage($importer, $fields);
case "participation":
if (!$private) {
Logger::log('Message with type ' . $type . ' is not private, quitting.');
return false;
}
return self::receiveParticipation($importer, $fields);
case "photo": // Not implemented
return self::receivePhoto($importer, $fields);
case "poll_participation": // Not implemented
return self::receivePollParticipation($importer, $fields);
case "profile":
if (!$private) {
Logger::log('Message with type ' . $type . ' is not private, quitting.');
return false;
}
return self::receiveProfile($importer, $fields);
case "reshare":
return self::receiveReshare($importer, $fields, $msg["message"]);
case "retraction":
return self::receiveRetraction($importer, $sender, $fields);
case "status_message":
return self::receiveStatusMessage($importer, $fields, $msg["message"]);
default:
Logger::log("Unknown message type ".$type);
return false;
}
}
/**
* @brief 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 $msg Array with the XML, the sender handle and the sender signature
*
* @return bool|SimpleXMLElement If the posting is valid then an array with an SimpleXML object is returned
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function validPosting($msg)
{
$data = XML::parseString($msg["message"]);
if (!is_object($data)) {
Logger::log("No valid XML ".$msg["message"], Logger::DEBUG);
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 = $type;
Logger::log("Got message type ".$type.": ".$msg["message"], Logger::DATA);
// All retractions are handled identically from now on.
// In the new version there will only be "retraction".
if (in_array($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"] != $fields->author) {
Logger::log("Message handle is not the same as envelope sender. Quitting this message.");
return false;
}
}
// Only some message types have signatures. So we quit here for the other types.
if (!in_array($type, ["comment", "like"])) {
return $fields;
}
// No author_signature? This is a must, so we quit.
if (!isset($author_signature)) {
Logger::log("No author signature for type ".$type." - Message: ".$msg["message"], Logger::DEBUG);
return false;
}
if (isset($parent_author_signature)) {
$key = self::key($msg["author"]);
if (empty($key)) {
Logger::log("No key found for parent author ".$msg["author"], Logger::DEBUG);
return false;
}
if (!Crypto::rsaVerify($signed_data, $parent_author_signature, $key, "sha256")) {
Logger::log("No valid parent author signature for parent author ".$msg["author"]. " in type ".$type." - signed data: ".$signed_data." - Message: ".$msg["message"]." - Signature ".$parent_author_signature, Logger::DEBUG);
return false;
}
}
$key = self::key($fields->author);
if (empty($key)) {
Logger::log("No key found for author ".$fields->author, Logger::DEBUG);
return false;
}
if (!Crypto::rsaVerify($signed_data, $author_signature, $key, "sha256")) {
Logger::log("No valid author signature for author ".$fields->author. " in type ".$type." - signed data: ".$signed_data." - Message: ".$msg["message"]." - Signature ".$author_signature, Logger::DEBUG);
return false;
} else {
return $fields;
}
}
/**
* @brief Fetches the public key for a given handle
*
* @param string $handle The handle
*
* @return string The public key
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function key($handle)
{
$handle = strval($handle);
Logger::log("Fetching diaspora key for: ".$handle);
$r = self::personByHandle($handle);
if ($r) {
return $r["pubkey"];
}
return "";
}
/**
* @brief Fetches data for a given handle
*
* @param string $handle The handle
* @param boolean $update true = always update, false = never update, null = update when not found or outdated
*
* @return array the queried data
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
public static function personByHandle($handle, $update = null)
{
$person = DBA::selectFirst('fcontact', [], ['network' => Protocol::DIASPORA, 'addr' => $handle]);
if (!DBA::isResult($person)) {
$urls = [$handle, str_replace('http://', 'https://', $handle), Strings::normaliseLink($handle)];
$person = DBA::selectFirst('fcontact', [], ['network' => Protocol::DIASPORA, 'url' => $urls]);
}
if (DBA::isResult($person)) {
Logger::debug("In cache " . print_r($person, true));
if (is_null($update)) {
// update record occasionally so it doesn't get stale
$d = strtotime($person["updated"]." +00:00");
if ($d < strtotime("now - 14 days")) {
$update = true;
}
if ($person["guid"] == "") {
$update = true;
}
}
} elseif (is_null($update)) {
$update = !DBA::isResult($person);
} else {
$person = [];
}
if ($update) {
Logger::log("create or refresh", Logger::DEBUG);
$r = Probe::uri($handle, Protocol::DIASPORA);
// Note that Friendica contacts will return a "Diaspora person"
// if Diaspora connectivity is enabled on their server
if ($r && ($r["network"] === Protocol::DIASPORA)) {
self::updateFContact($r);
$person = self::personByHandle($handle, false);
}
}
return $person;
}
/**
* @brief Updates the fcontact table
*
* @param array $arr The fcontact data
* @throws \Exception
*/
private static function updateFContact($arr)
{
$fields = ['name' => $arr["name"], 'photo' => $arr["photo"],
'request' => $arr["request"], 'nick' => $arr["nick"],
'addr' => strtolower($arr["addr"]), 'guid' => $arr["guid"],
'batch' => $arr["batch"], 'notify' => $arr["notify"],
'poll' => $arr["poll"], 'confirm' => $arr["confirm"],
'alias' => $arr["alias"], 'pubkey' => $arr["pubkey"],
'updated' => DateTimeFormat::utcNow()];
$condition = ['url' => $arr["url"], 'network' => $arr["network"]];
DBA::update('fcontact', $fields, $condition, true);
}
/**
* @brief get a handle (user@domain.tld) from a given contact id
*
* @param int $contact_id The id in the contact table
* @param int $pcontact_id The id in the contact table (Used for the public contact)
*
* @return string the handle
* @throws \Exception
*/
private static function handleFromContact($contact_id, $pcontact_id = 0)
{
$handle = false;
Logger::log("contact id is ".$contact_id." - pcontact id is ".$pcontact_id, Logger::DEBUG);
if ($pcontact_id != 0) {
$contact = DBA::selectFirst('contact', ['addr'], ['id' => $pcontact_id]);
if (DBA::isResult($contact) && !empty($contact["addr"])) {
return strtolower($contact["addr"]);
}
}
$r = q(
"SELECT `network`, `addr`, `self`, `url`, `nick` FROM `contact` WHERE `id` = %d",
intval($contact_id)
);
if (DBA::isResult($r)) {
$contact = $r[0];
Logger::log("contact 'self' = ".$contact['self']." 'url' = ".$contact['url'], Logger::DEBUG);
if ($contact['addr'] != "") {
$handle = $contact['addr'];
} else {
$baseurl_start = strpos($contact['url'], '://') + 3;
// allows installations in a subdirectory--not sure how Diaspora will handle
$baseurl_length = strpos($contact['url'], '/profile') - $baseurl_start;
$baseurl = substr($contact['url'], $baseurl_start, $baseurl_length);
$handle = $contact['nick'].'@'.$baseurl;
}
}
return strtolower($handle);
}
/**
* @brief get a url (scheme://domain.tld/u/user) from a given Diaspora*
* fcontact guid
*
* @param mixed $fcontact_guid Hexadecimal string guid
*
* @return string the contact url or null
* @throws \Exception
*/
public static function urlFromContactGuid($fcontact_guid)
{
Logger::log("fcontact guid is ".$fcontact_guid, Logger::DEBUG);
$r = q(
"SELECT `url` FROM `fcontact` WHERE `url` != '' AND `network` = '%s' AND `guid` = '%s'",
DBA::escape(Protocol::DIASPORA),
DBA::escape($fcontact_guid)
);
if (DBA::isResult($r)) {
return $r[0]['url'];
}
return null;
}
/**
* @brief Get a contact id for a given handle
*
* @todo Move to Friendica\Model\Contact
*
* @param int $uid The user id
* @param string $handle The handle in the format user@domain.tld
*
* @return array Contact data
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function contactByHandle($uid, $handle)
{
$cid = Contact::getIdForURL($handle, $uid);
if (!$cid) {
Logger::log("Haven't found a contact for user " . $uid . " and handle " . $handle, Logger::DEBUG);
return false;
}
$contact = DBA::selectFirst('contact', [], ['id' => $cid]);
if (!DBA::isResult($contact)) {
// This here shouldn't happen at all
Logger::log("Haven't found a contact for user " . $uid . " and handle " . $handle, Logger::DEBUG);
return false;
}
return $contact;
}
/**
* Checks if the given contact url does support ActivityPub
*
* @param string $url profile url
* @param boolean $update true = always update, false = never update, null = update when not found or outdated
* @return boolean
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
public static function isSupportedByContactUrl($url, $update = null)
{
return !empty(self::personByHandle($url, $update));
}
/**
* @brief 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, $is_comment = false)
{
/*
* Perhaps we were already sharing with this person. Now they're sharing with us.
* That makes us friends.
* Normally this should have handled by getting a request - but this could get lost
*/
// It is deactivated by now, due to side effects. See issue https://github.com/friendica/friendica/pull/4033
// It is not removed by now. Possibly the code is needed?
//if (!$is_comment && $contact["rel"] == Contact::FOLLOWER && in_array($importer["page-flags"], array(User::PAGE_FLAGS_FREELOVE))) {
// DBA::update(
// 'contact',
// array('rel' => Contact::FRIEND, 'writable' => true),
// array('id' => $contact["id"], 'uid' => $contact["uid"])
// );
//
// $contact["rel"] = Contact::FRIEND;
// Logger::log("defining user ".$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 it a post to a community?
} elseif (($contact["rel"] == Contact::FOLLOWER) && in_array($importer["page-flags"], [User::PAGE_FLAGS_COMMUNITY, User::PAGE_FLAGS_PRVGROUP])) {
// That's good
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;
}
/**
* @brief 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 The contact data
* @throws \Exception
*/
private static function allowedContactByHandle(array $importer, $handle, $is_comment = false)
{
$contact = self::contactByHandle($importer["uid"], $handle);
if (!$contact) {
Logger::log("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, $is_comment)) {
Logger::log("The handle: ".$handle." is not allowed to post to user ".$importer["uid"]);
return false;
}
return $contact;
}
/**
* @brief Does the message already exists on the system?
*
* @param int $uid The user id
* @param string $guid The guid of the message
*
* @return int|bool message id if the message already was stored into the system - or false.
* @throws \Exception
*/
private static function messageExists($uid, $guid)
{
$item = Item::selectFirst(['id'], ['uid' => $uid, 'guid' => $guid]);
if (DBA::isResult($item)) {
Logger::log("message ".$guid." already exists for user ".$uid);
return $item["id"];
}
return false;
}
/**
* @brief Checks for links to posts in a message
*
* @param array $item The item array
* @return void
*/
private static function fetchGuid(array $item)
{
$expression = "=diaspora://.*?/post/([0-9A-Za-z\-_@.:]{15,254}[0-9A-Za-z])=ism";
preg_replace_callback(
$expression,
function ($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"]
);
}
/**
* @brief 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 $author_link The author link for missing local contact fallback
*
* @return string the replaced string
*/
public static function replacePeopleGuid($body, $author_link)
{
$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'
$handle = self::urlFromContactGuid($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;
}
/**
* @brief 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 $item The item array
* @return void
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function fetchGuidSub($match, $item)
{
if (!self::storeByGuid($match[1], $item["author-link"])) {
self::storeByGuid($match[1], $item["owner-link"]);
}
}
/**
* @brief Fetches an item with a given guid from a given server
*
* @param string $guid the message guid
* @param string $server The server address
* @param int $uid The user id of the user
*
* @return int the message id of the stored message or false
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function storeByGuid($guid, $server, $uid = 0)
{
$serverparts = parse_url($server);
if (empty($serverparts["host"]) || empty($serverparts["scheme"])) {
return false;
}
$server = $serverparts["scheme"]."://".$serverparts["host"];
Logger::log("Trying to fetch item ".$guid." from ".$server, Logger::DEBUG);
$msg = self::message($guid, $server);
if (!$msg) {
return false;
}
Logger::log("Successfully fetched item ".$guid." from ".$server, Logger::DEBUG);
// Now call the dispatcher
return self::dispatchPublic($msg);
}
/**
* @brief Fetches a message from a server
*
* @param string $guid message guid
* @param string $server The url of the server
* @param int $level Endless loop prevention
*
* @return array
* 'message' => The message XML
* 'author' => The author handle
* 'key' => The public key of the author
* @throws \Exception
*/
private static function message($guid, $server, $level = 0)
{
if ($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::log("Fetch post from ".$source_url, Logger::DEBUG);
$envelope = Network::fetchUrl($source_url);
if ($envelope) {
Logger::log("Envelope was fetched.", Logger::DEBUG);
$x = self::verifyMagicEnvelope($envelope);
if (!$x) {
Logger::log("Envelope could not be verified.", Logger::DEBUG);
} else {
Logger::log("Envelope was verified.", Logger::DEBUG);
}
} 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::log("Message is a reshare", Logger::DEBUG);
return self::message($source_xml->post->reshare->root_guid, $server, ++$level);
} elseif ($source_xml->getName() == "reshare") {
// Reshare of a reshare - new Diaspora version
Logger::log("Message is a new reshare", Logger::DEBUG);
return self::message($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::log("Message doesn't seem to be a status message", Logger::DEBUG);
return false;
}
$msg = ["message" => $x, "author" => $author];
$msg["key"] = self::key($msg["author"]);
return $msg;
}
/**
* @brief Fetches an item with a given URL
*
* @param string $url the message url
*
* @return int the message id of the stored message or false
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
public static function fetchByURL($url, $uid = 0)
{
// Check for Diaspora (and Friendica) typical paths
if (!preg_match("=(https?://.+)/(?:posts|display)/([a-zA-Z0-9-_@.:%]+[a-zA-Z0-9])=i", $url, $matches)) {
return false;
}
$guid = urldecode($matches[2]);
$item = Item::selectFirst(['id'], ['guid' => $guid, 'uid' => $uid]);
if (DBA::isResult($item)) {
return $item['id'];
}
self::storeByGuid($guid, $matches[1], $uid);
$item = Item::selectFirst(['id'], ['guid' => $guid, 'uid' => $uid]);
if (DBA::isResult($item)) {
return $item['id'];
} else {
return false;
}
}
/**
* @brief 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 $contact The contact of the item owner
*
* @return array the item record
* @throws \Exception
*/
private static function parentItem($uid, $guid, $author, array $contact)
{
$fields = ['id', 'parent', 'body', 'wall', 'uri', 'guid', 'private', 'origin',
'author-name', 'author-link', 'author-avatar',
'owner-name', 'owner-link', 'owner-avatar'];
$condition = ['uid' => $uid, 'guid' => $guid];
$item = Item::selectFirst($fields, $condition);
if (!DBA::isResult($item)) {
$person = self::personByHandle($author);
$result = self::storeByGuid($guid, $person["url"], $uid);
// We don't have an url for items that arrived at the public dispatcher
if (!$result && !empty($contact["url"])) {
$result = self::storeByGuid($guid, $contact["url"], $uid);
}
if ($result) {
Logger::log("Fetched missing item ".$guid." - result: ".$result, Logger::DEBUG);
$item = Item::selectFirst($fields, $condition);
}
}
if (!DBA::isResult($item)) {
Logger::log("parent item not found: parent: ".$guid." - user: ".$uid);
return false;
} else {
Logger::log("parent item found: parent: ".$guid." - user: ".$uid);
return $item;
}
}
/**
* @brief 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 $uid The user id
*
* @return array
* 'cid' => contact id
* 'network' => network type
* @throws \Exception
*/
private static function authorContactByUrl($def_contact, $person, $uid)
{
$condition = ['nurl' => Strings::normaliseLink($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];
}
/**
* @brief Is the profile a hubzilla profile?
*
* @param string $url The profile link
*
* @return bool is it a hubzilla server?
*/
public static function isRedmatrix($url)
{
return(strstr($url, "/channel/"));
}
/**
* @brief Generate a post link with a given handle and message guid
*
* @param string $addr The user handle
* @param string $guid message guid
* @param string $parent_guid optional parent guid
*
* @return string the post link
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function plink($addr, $guid, $parent_guid = '')
{
$contact = Contact::getDetailsByAddr($addr);
// Fallback
if (!$contact) {
if ($parent_guid != '') {
return "https://" . substr($addr, strpos($addr, "@") + 1) . "/posts/" . $parent_guid . "#" . $guid;
} else {
return "https://" . substr($addr, strpos($addr, "@") + 1) . "/posts/" . $guid;
}
}
if ($contact["network"] == Protocol::DFRN) {
return str_replace("/profile/" . $contact["nick"] . "/", "/display/" . $guid, $contact["url"] . "/");
}
if (self::isRedmatrix($contact["url"])) {
return $contact["url"] . "/?mid=" . $guid;
}
if ($parent_guid != '') {
return "https://" . substr($addr, strpos($addr, "@") + 1) . "/posts/" . $parent_guid . "#" . $guid;
} else {
return "https://" . substr($addr, strpos($addr, "@") + 1) . "/posts/" . $guid;
}
}
/**
* @brief Receives account migration
*
* @param array $importer Array of the importer user
* @param object $data The message object
*
* @return bool Success
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function receiveAccountMigration(array $importer, $data)
{
$old_handle = Strings::escapeTags(XML::unescape($data->author));
$new_handle = Strings::escapeTags(XML::unescape($data->profile->author));
$signature = Strings::escapeTags(XML::unescape($data->signature));
$contact = self::contactByHandle($importer["uid"], $old_handle);
if (!$contact) {
Logger::log("cannot find contact for sender: ".$old_handle." and user ".$importer["uid"]);
return false;
}
Logger::log("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, $key, "sha256")) {
Logger::log('No valid signature for migration.');
return false;
}
// Update the profile
self::receiveProfile($importer, $data->profile);
// change the technical stuff in contact and gcontact
$data = Probe::uri($new_handle);
if ($data['network'] == Protocol::PHANTOM) {
Logger::log('Account for '.$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']];
DBA::update('contact', $fields, ['addr' => $old_handle]);
$fields = ['url' => $data['url'], 'nurl' => Strings::normaliseLink($data['url']),
'name' => $data['name'], 'nick' => $data['nick'],
'addr' => $data['addr'], 'connect' => $data['addr'],
'notify' => $data['notify'], 'photo' => $data['photo'],
'server_url' => $data['baseurl'], 'network' => $data['network']];
DBA::update('gcontact', $fields, ['addr' => $old_handle]);
Logger::log('Contacts are updated.');
return true;
}
/**
* @brief Processes an account deletion
*
* @param object $data The message object
*
* @return bool Success
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
private static function receiveAccountDeletion($data)
{
$author = Strings::escapeTags(XML::unescape($data->author));
$contacts = DBA::select('contact', ['id'], ['addr' => $author]);
while ($contact = DBA::fetch($contacts)) {
Contact::remove($contact["id"]);
}
DBA::delete('gcontact', ['addr' => $author]);
Logger::log('Removed contacts for ' . $author);
return true;
}
/**
* @brief 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 $onlyfound Only return uri when found in the database
*
* @return string The constructed uri or the one from our database
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function getUriFromGuid($author, $guid, $onlyfound = false)
{
$item = Item::selectFirst(['uri'], ['guid' => $guid]);
if (DBA::isResult($item)) {
return $item["uri"];
} elseif (!$onlyfound) {
$person = self::personByHandle($author);
$parts = parse_url($person['url']);
unset($parts['path']);
$host_url = Network::unparseURL($parts);
return $host_url . '/objects/' . $guid;
}
return "";
}
/**
* @brief Fetch the guid from our database with a given uri
*
* @param string $uri Message uri
* @param string $uid Author handle
*
* @return string The post guid
* @throws \Exception
*/
private static function getGuidFromUri($uri, $uid)
{
$item = Item::selectFirst(['guid'], ['uri' => $uri, 'uid' => $uid]);
if (DBA::isResult($item)) {
return $item["guid"];
} else {
return false;
}
}
/**
* @brief Find the best importer for a comment, like, ...
*
* @param string $guid The guid of the item
*
* @return array|boolean the origin owner of that post - or false
* @throws \Exception
*/
private static function importerForGuid($guid)
{
$item = Item::selectFirst(['uid'], ['origin' => true, 'guid' => $guid]);
if (DBA::isResult($item)) {
Logger::log("Found user ".$item['uid']." as owner of item ".$guid, Logger::DEBUG);
$contact = DBA::selectFirst('contact', [], ['self' => true, 'uid' => $item['uid']]);
if (DBA::isResult($contact)) {
return $contact;
}
}
return false;
}
/**
* @brief Processes an incoming comment
*
* @param array $importer Array of the importer user
* @param string $sender The sender of the message
* @param object $data The message object
* @param string $xml The original XML of the message
*
* @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, $sender, $data, $xml)
{
$author = Strings::escapeTags(XML::unescape($data->author));
$guid = Strings::escapeTags(XML::unescape($data->guid));
$parent_guid = Strings::escapeTags(XML::unescape($data->parent_guid));
$text = XML::unescape($data->text);
if (isset($data->created_at)) {
$created_at = DateTimeFormat::utc(Strings::escapeTags(XML::unescape($data->created_at)));
} else {
$created_at = DateTimeFormat::utcNow();
}
if (isset($data->thread_parent_guid)) {
$thread_parent_guid = Strings::escapeTags(XML::unescape($data->thread_parent_guid));
$thr_uri = self::getUriFromGuid("", $thread_parent_guid, true);
} else {
$thr_uri = "";
}
$contact = self::allowedContactByHandle($importer, $sender, true);
if (!$contact) {
return false;
}
$message_id = self::messageExists($importer["uid"], $guid);
if ($message_id) {
return true;
}
$parent_item = self::parentItem($importer["uid"], $parent_guid, $author, $contact);
if (!$parent_item) {
return false;
}
$person = self::personByHandle($author);
if (!is_array($person)) {
Logger::log("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);
$datarray["guid"] = $guid;
$datarray["uri"] = self::getUriFromGuid($author, $guid);
$datarray["verb"] = Activity::POST;
$datarray["gravity"] = GRAVITY_COMMENT;
if ($thr_uri != "") {
$datarray["parent-uri"] = $thr_uri;
} else {
$datarray["parent-uri"] = $parent_item["uri"];
}
$datarray["object-type"] = Activity\ObjectType::COMMENT;
$datarray["protocol"] = Conversation::PARCEL_DIASPORA;
$datarray["source"] = $xml;
$datarray["changed"] = $datarray["created"] = $datarray["edited"] = $created_at;
$datarray["plink"] = self::plink($author, $guid, $parent_item['guid']);
$body = Markdown::toBBCode($text);
$datarray["body"] = self::replacePeopleGuid($body, $person["url"]);
self::fetchGuid($datarray);
// If we are the origin of the parent we store the original data.
// We notify our followers during the item storage.
if ($parent_item["origin"]) {
$datarray['diaspora_signed_text'] = json_encode($data);
}
$message_id = Item::insert($datarray);
if ($message_id <= 0) {
return false;
}
if ($message_id) {
Logger::log("Stored comment ".$datarray["guid"]." with message id ".$message_id, Logger::DEBUG);
if ($datarray['uid'] == 0) {
Item::distribute($message_id, json_encode($data));
}
}
return true;
}
/**
* @brief processes and stores private messages
*
* @param array $importer Array of the importer user
* @param array $contact The contact of the message
* @param object $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
*/
private static function receiveConversationMessage(array $importer, array $contact, $data, $msg, $mesg, $conversation)
{
$author = Strings::escapeTags(XML::unescape($data->author));
$guid = Strings::escapeTags(XML::unescape($data->guid));
$subject = Strings::escapeTags(XML::unescape($data->subject));
// "diaspora_handle" is the element name from the old version
// "author" is the element name from the new version
if ($mesg->author) {
$msg_author = Strings::escapeTags(XML::unescape($mesg->author));
} elseif ($mesg->diaspora_handle) {
$msg_author = Strings::escapeTags(XML::unescape($mesg->diaspora_handle));
} else {
return false;
}
$msg_guid = Strings::escapeTags(XML::unescape($mesg->guid));
$msg_conversation_guid = Strings::escapeTags(XML::unescape($mesg->conversation_guid));
$msg_text = XML::unescape($mesg->text);
$msg_created_at = DateTimeFormat::utc(Strings::escapeTags(XML::unescape($mesg->created_at)));
if ($msg_conversation_guid != $guid) {
Logger::log("message conversation guid does not belong to the current conversation.");
return false;
}
$body = Markdown::toBBCode($msg_text);
$message_uri = $msg_author.":".$msg_guid;
$person = self::personByHandle($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
]);
}
/**
* @brief 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 object $data The message object
*
* @return bool Success
* @throws \Exception
*/
private static function receiveConversation(array $importer, $msg, $data)
{
$author = Strings::escapeTags(XML::unescape($data->author));
$guid = Strings::escapeTags(XML::unescape($data->guid));
$subject = Strings::escapeTags(XML::unescape($data->subject));
$created_at = DateTimeFormat::utc(Strings::escapeTags(XML::unescape($data->created_at)));
$participants = Strings::escapeTags(XML::unescape($data->participants));
$messages = $data->message;
if (!count($messages)) {
Logger::log("empty conversation");
return false;
}
$contact = self::allowedContactByHandle($importer, $msg["author"], true);
if (!$contact) {
return false;
}
$conversation = DBA::selectFirst('conv', [], ['uid' => $importer["uid"], 'guid' => $guid]);
if (!DBA::isResult($conversation)) {
$r = q(
"INSERT INTO `conv` (`uid`, `guid`, `creator`, `created`, `updated`, `subject`, `recips`)
VALUES (%d, '%s', '%s', '%s', '%s', '%s', '%s')",
intval($importer["uid"]),
DBA::escape($guid),
DBA::escape($author),
DBA::escape($created_at),
DBA::escape(DateTimeFormat::utcNow()),
DBA::escape($subject),
DBA::escape($participants)
);
if ($r) {
$conversation = DBA::selectFirst('conv', [], ['uid' => $importer["uid"], 'guid' => $guid]);
}
}
if (!$conversation) {
Logger::log("unable to create conversation.");
return false;
}
foreach ($messages as $mesg) {
self::receiveConversationMessage($importer, $contact, $data, $msg, $mesg, $conversation);
}
return true;
}
/**
* @brief Processes "like" messages
*
* @param array $importer Array of the importer user
* @param string $sender The sender of the message
* @param object $data The message object
*
* @return int The message id of the generated like or "false" if there was an error
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function receiveLike(array $importer, $sender, $data)
{
$author = Strings::escapeTags(XML::unescape($data->author));
$guid = Strings::escapeTags(XML::unescape($data->guid));
$parent_guid = Strings::escapeTags(XML::unescape($data->parent_guid));
$parent_type = Strings::escapeTags(XML::unescape($data->parent_type));
$positive = Strings::escapeTags(XML::unescape($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;
}
$message_id = self::messageExists($importer["uid"], $guid);
if ($message_id) {
return true;
}
$parent_item = self::parentItem($importer["uid"], $parent_guid, $author, $contact);
if (!$parent_item) {
return false;
}
$person = self::personByHandle($author);
if (!is_array($person)) {
Logger::log("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["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["parent-uri"] = $parent_item["uri"];
$datarray["object-type"] = Activity\ObjectType::NOTE;
$datarray["body"] = $verb;
// Diaspora doesn't provide a date for likes
$datarray["changed"] = $datarray["created"] = $datarray["edited"] = DateTimeFormat::utcNow();
// like on comments have the comment as parent. So we need to fetch the toplevel parent
if ($parent_item["id"] != $parent_item["parent"]) {
$toplevel = Item::selectFirst(['origin'], ['id' => $parent_item["parent"]]);
$origin = $toplevel["origin"];
} else {
$origin = $parent_item["origin"];
}
// If we are the origin of the parent we store the original data.
// We notify our followers during the item storage.
if ($origin) {
$datarray['diaspora_signed_text'] = json_encode($data);
}
$message_id = Item::insert($datarray);
if ($message_id <= 0) {
return false;
}
if ($message_id) {
Logger::log("Stored like ".$datarray["guid"]." with message id ".$message_id, Logger::DEBUG);
if ($datarray['uid'] == 0) {
Item::distribute($message_id, json_encode($data));
}
}
return true;
}
/**
* @brief Processes private messages
*
* @param array $importer Array of the importer user
* @param object $data The message object
*
* @return bool Success?
* @throws \Exception
*/
private static function receiveMessage(array $importer, $data)
{
$author = Strings::escapeTags(XML::unescape($data->author));
$guid = Strings::escapeTags(XML::unescape($data->guid));
$conversation_guid = Strings::escapeTags(XML::unescape($data->conversation_guid));
$text = XML::unescape($data->text);
$created_at = DateTimeFormat::utc(Strings::escapeTags(XML::unescape($data->created_at)));
$contact = self::allowedContactByHandle($importer, $author, true);
if (!$contact) {
return false;
}
$conversation = null;
$condition = ['uid' => $importer["uid"], 'guid' => $conversation_guid];
$conversation = DBA::selectFirst('conv', [], $condition);
if (!DBA::isResult($conversation)) {
Logger::log("conversation not available.");
return false;
}
$message_uri = $author.":".$guid;
$person = self::personByHandle($author);
if (!$person) {
Logger::log("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
]);
}
/**
* @brief Processes participations - unsupported by now
*
* @param array $importer Array of the importer user
* @param object $data The message object
*
* @return bool always true
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function receiveParticipation(array $importer, $data)
{
$author = strtolower(Strings::escapeTags(XML::unescape($data->author)));
$parent_guid = Strings::escapeTags(XML::unescape($data->parent_guid));
$contact_id = Contact::getIdForURL($author);
if (!$contact_id) {
Logger::log('Contact not found: '.$author);
return false;
}
$person = self::personByHandle($author);
if (!is_array($person)) {
Logger::log("Person not found: ".$author);
return false;
}
$item = Item::selectFirst(['id'], ['guid' => $parent_guid, 'origin' => true, 'private' => false]);
if (!DBA::isResult($item)) {
Logger::log('Item not found, no origin or private: '.$parent_guid);
return false;
}
$author_parts = explode('@', $author);
if (isset($author_parts[1])) {
$server = $author_parts[1];
} else {
// Should never happen
$server = $author;
}
Logger::log('Received participation for ID: '.$item['id'].' - Contact: '.$contact_id.' - Server: '.$server, Logger::DEBUG);
if (!DBA::exists('participation', ['iid' => $item['id'], 'server' => $server])) {
DBA::insert('participation', ['iid' => $item['id'], 'cid' => $contact_id, 'fid' => $person['id'], 'server' => $server]);
}
// Send all existing comments and likes to the requesting server
$comments = Item::select(['id', 'parent', 'verb', 'self'], ['parent' => $item['id']]);
while ($comment = Item::fetch($comments)) {
if ($comment['id'] == $comment['parent']) {
continue;
}
Logger::info('Deliver participation', ['item' => $comment['id'], 'contact' => $contact_id]);
if (Worker::add(PRIORITY_HIGH, 'Delivery', Delivery::POST, $comment['id'], $contact_id)) {
ItemDeliveryData::incrementQueueCount($comment['id'], 1);
}
}
DBA::close($comments);
return true;
}
/**
* @brief Processes photos - unneeded
*
* @param array $importer Array of the importer user
* @param object $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;
}
/**
* @brief 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;
}
/**
* @brief Processes incoming profile updates
*
* @param array $importer Array of the importer user
* @param object $data The message object
*
* @return bool Success
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function receiveProfile(array $importer, $data)
{
$author = strtolower(Strings::escapeTags(XML::unescape($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);
$gender = XML::unescape($data->gender);
$about = Markdown::toBBCode(XML::unescape($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) {
$image_url = "http://".$handle_parts[1].$image_url;
}
Contact::updateAvatar($image_url, $importer["uid"], $contact["id"]);
// 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, 'gender' => $gender,
'addr' => $author, 'nick' => $nick, 'keywords' => $keywords,
'unsearchable' => !$searchable, 'sensitive' => $nsfw];
if (!empty($birthday)) {
$fields['bd'] = $birthday;
}
DBA::update('contact', $fields, ['id' => $contact['id']]);
// @todo Update the public contact, then update the gcontact from that
$gcontact = ["url" => $contact["url"], "network" => Protocol::DIASPORA, "generation" => 2,
"photo" => $image_url, "name" => $name, "location" => $location,
"about" => $about, "birthday" => $birthday, "gender" => $gender,
"addr" => $author, "nick" => $nick, "keywords" => $keywords,
"hide" => !$searchable, "nsfw" => $nsfw];
$gcid = GContact::update($gcontact);
GContact::link($gcid, $importer["uid"], $contact["id"]);
Logger::log("Profile of contact ".$contact["id"]." stored for user ".$importer["uid"], Logger::DEBUG);
return true;
}
/**
* @brief 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) {
DBA::update(
'contact',
['rel' => Contact::FRIEND, 'writable' => true],
['id' => $contact["id"], 'uid' => $importer["uid"]]
);
}
}
/**
* @brief Processes incoming sharing notification
*
* @param array $importer Array of the importer user
* @param object $data The message object
*
* @return bool Success
* @throws \Exception
*/
private static function receiveContactRequest(array $importer, $data)
{
$author = XML::unescape($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 ($following) {
Logger::log("Author ".$author." (Contact ".$contact["id"].") wants to follow us.", Logger::DEBUG);
self::receiveRequestMakeFriend($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::log("Sending share message to author ".$author." - Contact: ".$contact["id"]." - User: ".$importer["uid"], Logger::DEBUG);
self::sendShare($user, $contact);
}
}
return true;
} else {
Logger::log("Author ".$author." doesn't want to follow us anymore.", Logger::DEBUG);
Contact::removeFollower($importer, $contact);
return true;
}
}
if (!$following && $sharing && in_array($importer["page-flags"], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_NORMAL])) {
Logger::log("Author ".$author." wants to share with us - but doesn't want to listen. Request is ignored.", Logger::DEBUG);
return false;
} elseif (!$following && !$sharing) {
Logger::log("Author ".$author." doesn't want anything - and we don't know the author. Request is ignored.", Logger::DEBUG);
return false;
} elseif (!$following && $sharing) {
Logger::log("Author ".$author." wants to share with us.", Logger::DEBUG);
} elseif ($following && $sharing) {
Logger::log("Author ".$author." wants to have a bidirectional conection.", Logger::DEBUG);
} elseif ($following && !$sharing) {
Logger::log("Author ".$author." wants to listen to us.", Logger::DEBUG);
}
$ret = self::personByHandle($author);
if (!$ret || ($ret["network"] != Protocol::DIASPORA)) {
Logger::log("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;
}
$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;
}
/**
* @brief Fetches a message with a given guid
*
* @param string $guid message guid
* @param string $orig_author handle of the original post
* @return array The fetched item
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
public static function originalItem($guid, $orig_author)
{
if (empty($guid)) {
Logger::log('Empty guid. Quitting.');
return false;
}
// Do we already have this item?
$fields = ['body', 'title', 'attach', 'tag', 'app', 'created', 'object-type', 'uri', 'guid',
'author-name', 'author-link', 'author-avatar'];
$condition = ['guid' => $guid, 'visible' => true, 'deleted' => false, 'private' => false];
$item = Item::selectFirst($fields, $condition);
if (DBA::isResult($item)) {
Logger::log("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"]);
// Add OEmbed and other information to the body
$item["body"] = add_page_info_to_body($item["body"], false, true);
return $item;
} else {
return $item;
}
}
if (!DBA::isResult($item)) {
if (empty($orig_author)) {
Logger::log('Empty author for guid ' . $guid . '. Quitting.');
return false;
}
$server = "https://".substr($orig_author, strpos($orig_author, "@") + 1);
Logger::log("1st try: reshared message ".$guid." will be fetched via SSL from the server ".$server);
$stored = self::storeByGuid($guid, $server);
if (!$stored) {
$server = "http://".substr($orig_author, strpos($orig_author, "@") + 1);
Logger::log("2nd try: reshared message ".$guid." will be fetched without SSL from the server ".$server);
$stored = self::storeByGuid($guid, $server);
}
if ($stored) {
$fields = ['body', 'title', 'attach', 'tag', 'app', 'created', 'object-type', 'uri', 'guid',
'author-name', 'author-link', 'author-avatar'];
$condition = ['guid' => $guid, 'visible' => true, 'deleted' => false, 'private' => false];
$item = Item::selectFirst($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;
}
/**
* @brief 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 $author Author handle
*/
private static function addReshareActivity($item, $parent_message_id, $guid, $author)
{
$parent = Item::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['parent-uri'] = $parent['uri'];
$datarray['verb'] = $datarray['body'] = Activity::ANNOUNCE;
$datarray['gravity'] = GRAVITY_ACTIVITY;
$datarray['object-type'] = Activity\ObjectType::NOTE;
$datarray['protocol'] = $item['protocol'];
$datarray['plink'] = self::plink($author, $datarray['guid']);
$datarray['private'] = $item['private'];
$datarray['changed'] = $datarray['created'] = $datarray['edited'] = $item['created'];
$message_id = Item::insert($datarray);
if ($message_id) {
Logger::info('Stored reshare activity.', ['guid' => $guid, 'id' => $message_id]);
if ($datarray['uid'] == 0) {
Item::distribute($message_id);
}
}
}
/**
* @brief Processes a reshare message
*
* @param array $importer Array of the importer user
* @param object $data The message object
* @param string $xml The original XML of the message
*
* @return int the message id
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function receiveReshare(array $importer, $data, $xml)
{
$author = Strings::escapeTags(XML::unescape($data->author));
$guid = Strings::escapeTags(XML::unescape($data->guid));
$created_at = DateTimeFormat::utc(Strings::escapeTags(XML::unescape($data->created_at)));
$root_author = Strings::escapeTags(XML::unescape($data->root_author));
$root_guid = Strings::escapeTags(XML::unescape($data->root_guid));
/// @todo handle unprocessed property "provider_display_name"
$public = Strings::escapeTags(XML::unescape($data->public));
$contact = self::allowedContactByHandle($importer, $author, false);
if (!$contact) {
return false;
}
$message_id = self::messageExists($importer["uid"], $guid);
if ($message_id) {
return true;
}
$original_item = self::originalItem($root_guid, $root_author);
if (!$original_item) {
return false;
}
$orig_url = DI::baseUrl()."/display/".$original_item["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"] = $datarray["parent-uri"] = self::getUriFromGuid($author, $guid);
$datarray["verb"] = Activity::POST;
$datarray["gravity"] = GRAVITY_PARENT;
$datarray["protocol"] = Conversation::PARCEL_DIASPORA;
$datarray["source"] = $xml;
$prefix = share_header(
$original_item["author-name"],
$original_item["author-link"],
$original_item["author-avatar"],
$original_item["guid"],
$original_item["created"],
$orig_url
);
if (!empty($original_item['title'])) {
$prefix .= '[h3]' . $original_item['title'] . "[/h3]\n";
}
$datarray["body"] = $prefix.$original_item["body"]."[/share]";
$datarray["tag"] = $original_item["tag"];
$datarray["attach"] = $original_item["attach"];
$datarray["app"] = $original_item["app"];
$datarray["plink"] = self::plink($author, $guid);
$datarray["private"] = (($public == "false") ? 1 : 0);
$datarray["changed"] = $datarray["created"] = $datarray["edited"] = $created_at;
$datarray["object-type"] = $original_item["object-type"];
self::fetchGuid($datarray);
$message_id = Item::insert($datarray);
self::sendParticipation($contact, $datarray);
$root_message_id = self::messageExists($importer["uid"], $root_guid);
if ($root_message_id) {
self