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 include/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 "valid_posting" and interpret only the new protocol.
*/
use Friendica\App;
use Friendica\Core\System;
use Friendica\Core\Config;
require_once 'include/items.php';
require_once 'include/bb2diaspora.php';
require_once 'include/probe.php';
require_once 'include/Contact.php';
require_once 'include/Photo.php';
require_once 'include/socgraph.php';
require_once 'include/group.php';
require_once 'include/xml.php';
require_once 'include/datetime.php';
require_once 'include/queue_fn.php';
require_once 'include/cache.php';
/**
* @brief This class contain functions to create and send Diaspora XML files
*
*/
class Diaspora {
/**
* @brief Return a list of relay servers
*
* This is an experimental Diaspora feature.
*
* @return array of relay servers
*/
public static function relay_list() {
$serverdata = get_config("system", "relay_server");
if ($serverdata == "")
return array();
$relay = array();
$servers = explode(",", $serverdata);
foreach ($servers AS $server) {
$server = trim($server);
$addr = "relay@".str_replace("http://", "", normalise_link($server));
$batch = $server."/receive/public";
$relais = q("SELECT `batch`, `id`, `name`,`network` FROM `contact` WHERE `uid` = 0 AND `batch` = '%s' AND `addr` = '%s' AND `nurl` = '%s' LIMIT 1",
dbesc($batch), dbesc($addr), dbesc(normalise_link($server)));
if (!$relais) {
$r = q("INSERT INTO `contact` (`uid`, `created`, `name`, `nick`, `addr`, `url`, `nurl`, `batch`, `network`, `rel`, `blocked`, `pending`, `writable`, `name-date`, `uri-date`, `avatar-date`)
VALUES (0, '%s', '%s', 'relay', '%s', '%s', '%s', '%s', '%s', %d, 0, 0, 1, '%s', '%s', '%s')",
datetime_convert(),
dbesc($addr),
dbesc($addr),
dbesc($server),
dbesc(normalise_link($server)),
dbesc($batch),
dbesc(NETWORK_DIASPORA),
intval(CONTACT_IS_FOLLOWER),
dbesc(datetime_convert()),
dbesc(datetime_convert()),
dbesc(datetime_convert())
);
$relais = q("SELECT `batch`, `id`, `name`,`network` FROM `contact` WHERE `uid` = 0 AND `batch` = '%s' LIMIT 1", dbesc($batch));
if ($relais)
$relay[] = $relais[0];
} else
$relay[] = $relais[0];
}
return $relay;
}
/**
* @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 $level This value is only set inside this function to avoid endless loops
*
* @return string the repaired signature
*/
private static function repair_signature($signature, $handle = "", $level = 1) {
if ($signature == "")
return ($signature);
if (base64_encode(base64_decode(base64_decode($signature))) == base64_decode($signature)) {
$signature = base64_decode($signature);
logger("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)
$signature = self::repair_signature($signature, $handle, ++$level);
}
return($signature);
}
/**
* @brief verify the envelope and return the verified data
*
* @param string $envelope The magic envelope
*
* @return string verified data
*/
private static function verify_magic_envelope($envelope) {
$basedom = parse_xml_string($envelope, false);
if (!is_object($basedom)) {
logger("Envelope is no XML file");
return false;
}
$children = $basedom->children('http://salmon-protocol.org/ns/magic-env');
if (sizeof($children) == 0) {
logger("XML has no children");
return false;
}
$handle = "";
$data = base64url_decode($children->data);
$type = $children->data->attributes()->type[0];
$encoding = $children->encoding;
$alg = $children->alg;
$sig = base64url_decode($children->sig);
$key_id = $children->sig->attributes()->key_id[0];
if ($key_id != "")
$handle = base64url_decode($key_id);
$b64url_data = base64url_encode($data);
$msg = str_replace(array("\n", "\r", " ", "\t"), array("", "", "", ""), $b64url_data);
$signable_data = $msg.".".base64url_encode($type).".".base64url_encode($encoding).".".base64url_encode($alg);
$key = self::key($handle);
$verify = rsa_verify($signable_data, $sig, $key);
if (!$verify) {
logger('Message 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 $data The data that is to be encrypted
*
* @return string encrypted data
*/
private static function aes_encrypt($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 $encrypted The encrypted data
*
* @return string decrypted data
*/
private static function aes_decrypt($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 array $importer Array of the importer user
* @param string $raw raw post message
*
* @return array
* 'message' -> decoded Diaspora XML message
* 'author' -> author diaspora handle
* 'key' -> author public key (converted to pkcs#8)
*/
public static function decode_raw($importer, $raw) {
$data = json_decode($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, $importer['prvkey']);
$j_outer_key_bundle = json_decode($outer_key_bundle);
if (!is_object($j_outer_key_bundle)) {
logger('Outer Salmon did not verify. Discarding.');
http_status_exit(400);
}
$outer_iv = base64_decode($j_outer_key_bundle->iv);
$outer_key = base64_decode($j_outer_key_bundle->key);
$xml = diaspora::aes_decrypt($outer_key, $outer_iv, $ciphertext);
} else {
$xml = $raw;
}
$basedom = parse_xml_string($xml);
if (!is_object($basedom)) {
logger('Received data does not seem to be an XML. Discarding.');
http_status_exit(400);
}
$base = $basedom->children(NAMESPACE_SALMON_ME);
// Not sure if this cleaning is needed
$data = str_replace(array(" ", "\t", "\r", "\n"), array("", "", "", ""), $base->data);
// Build the signed data
$type = $base->data[0]->attributes()->type[0];
$encoding = $base->encoding;
$alg = $base->alg;
$signed_data = $data.'.'.base64url_encode($type).'.'.base64url_encode($encoding).'.'.base64url_encode($alg);
// This is the signature
$signature = base64url_decode($base->sig);
// Get the senders' public key
$key_id = $base->sig[0]->attributes()->key_id[0];
$author_addr = base64_decode($key_id);
$key = diaspora::key($author_addr);
$verify = rsa_verify($signed_data, $signature, $key);
if (!$verify) {
logger('Message did not verify. Discarding.');
http_status_exit(400);
}
return array('message' => (string)base64url_decode($base->data),
'author' => unxmlify($author_addr),
'key' => (string)$key);
}
/**
* @brief: Decodes incoming Diaspora message in the deprecated format
*
* @param array $importer Array of the importer user
* @param string $xml urldecoded Diaspora salmon
*
* @return array
* 'message' -> decoded Diaspora XML message
* 'author' -> author diaspora handle
* 'key' -> author public key (converted to pkcs#8)
*/
public static function decode($importer, $xml) {
$public = false;
$basedom = parse_xml_string($xml);
if (!is_object($basedom)) {
logger("XML is not parseable.");
return false;
}
$children = $basedom->children('https://joindiaspora.com/protocol');
if ($children->header) {
$public = true;
$author_link = str_replace('acct:','',$children->header->author_id);
} else {
// This happens with posts from a relais
if (!$importer) {
logger("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,$outer_key_bundle,$importer['prvkey']);
$j_outer_key_bundle = json_decode($outer_key_bundle);
$outer_iv = base64_decode($j_outer_key_bundle->iv);
$outer_key = base64_decode($j_outer_key_bundle->key);
$decrypted = self::aes_decrypt($outer_key, $outer_iv, $ciphertext);
logger('decrypted: '.$decrypted, LOGGER_DEBUG);
$idom = parse_xml_string($decrypted,false);
$inner_iv = base64_decode($idom->iv);
$inner_aes_key = base64_decode($idom->aes_key);
$author_link = str_replace('acct:','',$idom->author_id);
}
$dom = $basedom->children(NAMESPACE_SALMON_ME);
// figure out where in the DOM tree our data is hiding
if ($dom->provenance->data)
$base = $dom->provenance;
elseif ($dom->env->data)
$base = $dom->env;
elseif ($dom->data)
$base = $dom;
if (!$base) {
logger('unable to locate salmon data in xml');
http_status_exit(400);
}
// Stash the signature away for now. We have to find their key or it won't be good for anything.
$signature = base64url_decode($base->sig);
// unpack the data
// strip whitespace so our data element will return to one big base64 blob
$data = str_replace(array(" ","\t","\r","\n"),array("","","",""),$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 = $data.'.'.base64url_encode($type).'.'.base64url_encode($encoding).'.'.base64url_encode($alg);
// decode the data
$data = base64url_decode($data);
if ($public)
$inner_decrypted = $data;
else {
// Decode the encrypted blob
$inner_encrypted = base64_decode($data);
$inner_decrypted = self::aes_decrypt($inner_aes_key, $inner_iv, $inner_encrypted);
}
if (!$author_link) {
logger('Could not retrieve author URI.');
http_status_exit(400);
}
// 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('Fetching key for '.$author_link);
$key = self::key($author_link);
if (!$key) {
logger('Could not retrieve author key.');
http_status_exit(400);
}
$verify = rsa_verify($signed_data,$signature,$key);
if (!$verify) {
logger('Message did not verify. Discarding.');
http_status_exit(400);
}
logger('Message verified.');
return array('message' => (string)$inner_decrypted,
'author' => unxmlify($author_link),
'key' => (string)$key);
}
/**
* @brief Dispatches public messages and find the fitting receivers
*
* @param array $msg The post that will be dispatched
*
* @return int The message id of the generated message, "true" or "false" if there was an error
*/
public static function dispatch_public($msg) {
$enabled = intval(get_config("system", "diaspora_enabled"));
if (!$enabled) {
logger("diaspora is disabled");
return false;
}
if (!($postdata = self::valid_posting($msg))) {
logger("Invalid posting");
return false;
}
$fields = $postdata['fields'];
// Is it a an action (comment, like, ...) for our own post?
if (isset($fields->parent_guid) && !$postdata["relayed"]) {
$guid = notags(unxmlify($fields->parent_guid));
$importer = self::importer_for_guid($guid);
if (is_array($importer)) {
logger("delivering to origin: ".$importer["name"]);
$message_id = self::dispatch($importer, $msg, $fields);
return $message_id;
}
}
// Process item retractions. This has to be done separated from the other stuff,
// since retractions for comments could come even from non followers.
if (!empty($fields) && in_array($fields->getName(), array('retraction'))) {
$target = notags(unxmlify($fields->target_type));
if (in_array($target, array("Comment", "Like", "Post", "Reshare", "StatusMessage"))) {
logger('processing retraction for '.$target, LOGGER_DEBUG);
$importer = array("uid" => 0, "page-flags" => PAGE_FREELOVE);
$message_id = self::dispatch($importer, $msg, $fields);
return $message_id;
}
}
// Now distribute it to the followers
$r = q("SELECT `user`.* FROM `user` WHERE `user`.`uid` IN
(SELECT `contact`.`uid` FROM `contact` WHERE `contact`.`network` = '%s' AND `contact`.`addr` = '%s')
AND NOT `account_expired` AND NOT `account_removed`",
dbesc(NETWORK_DIASPORA),
dbesc($msg["author"])
);
if (dbm::is_result($r)) {
foreach ($r as $rr) {
logger("delivering to: ".$rr["username"]);
self::dispatch($rr, $msg, $fields);
}
} elseif (!Config::get('system', 'relay_subscribe', false)) {
logger("Unwanted message from ".$msg["author"]." send by ".$_SERVER["REMOTE_ADDR"]." with ".$_SERVER["HTTP_USER_AGENT"].": ".print_r($msg, true), LOGGER_DEBUG);
} else {
// Use a dummy importer to import the data for the public copy
$importer = array("uid" => 0, "page-flags" => PAGE_FREELOVE);
$message_id = self::dispatch($importer, $msg, $fields);
}
return $message_id;
}
/**
* @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 object $fields SimpleXML object that contains the message
*
* @return int The message id of the generated message, "true" or "false" if there was an error
*/
public static function dispatch($importer, $msg, $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)) {
if (!($postdata = self::valid_posting($msg))) {
logger("Invalid posting");
return false;
}
$fields = $postdata['fields'];
}
$type = $fields->getName();
logger("Received message type ".$type." from ".$sender." for user ".$importer["uid"], LOGGER_DEBUG);
switch ($type) {
case "account_deletion":
return self::receive_account_deletion($importer, $fields);
case "comment":
return self::receive_comment($importer, $sender, $fields, $msg["message"]);
case "contact":
return self::receive_contact_request($importer, $fields);
case "conversation":
return self::receive_conversation($importer, $msg, $fields);
case "like":
return self::receive_like($importer, $sender, $fields);
case "message":
return self::receive_message($importer, $fields);
case "participation": // Not implemented
return self::receive_participation($importer, $fields);
case "photo": // Not implemented
return self::receive_photo($importer, $fields);
case "poll_participation": // Not implemented
return self::receive_poll_participation($importer, $fields);
case "profile":
return self::receive_profile($importer, $fields);
case "reshare":
return self::receive_reshare($importer, $fields, $msg["message"]);
case "retraction":
return self::receive_retraction($importer, $sender, $fields);
case "status_message":
return self::receive_status_message($importer, $fields, $msg["message"]);
default:
logger("Unknown message type ".$type);
return false;
}
return true;
}
/**
* @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 $msg Array with the XML, the sender handle and the sender signature
*
* @return bool|array If the posting is valid then an array with an SimpleXML object is returned
*/
private static function valid_posting($msg) {
$data = parse_xml_string($msg["message"], false);
if (!is_object($data)) {
logger("No valid XML ".$msg["message"], LOGGER_DEBUG);
return false;
}
$first_child = $data->getName();
// Is this the new or the old version?
if ($data->getName() == "XML") {
$oldXML = true;
foreach ($data->post->children() as $child)
$element = $child;
} else {
$oldXML = false;
$element = $data;
}
$type = $element->getName();
$orig_type = $type;
logger("Got message type ".$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, array("signed_retraction", "relayable_retraction")))
$type = "retraction";
if ($type == "request")
$type = "contact";
$fields = new SimpleXMLElement("<".$type."/>");
$signed_data = "";
foreach ($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, array("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($fieldname, array("author_signature", "parent_author_signature", "target_author_signature"))) {
if ($signed_data != "") {
$signed_data .= ";";
$signed_data_parent .= ";";
}
$signed_data .= $entry;
}
if (!in_array($fieldname, array("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, array("status_message", "reshare", "profile")))
if ($msg["author"] != $fields->author) {
logger("Message handle is not the same as envelope sender. Quitting this message.");
return false;
}
// Only some message types have signatures. So we quit here for the other types.
if (!in_array($type, array("comment", "like"))) {
return array("fields" => $fields, "relayed" => false);
}
// No author_signature? This is a must, so we quit.
if (!isset($author_signature)) {
logger("No author signature for type ".$type." - Message: ".$msg["message"], LOGGER_DEBUG);
return false;
}
if (isset($parent_author_signature)) {
$relayed = true;
$key = self::key($msg["author"]);
if (!rsa_verify($signed_data, $parent_author_signature, $key, "sha256")) {
logger("No valid parent author signature for parent author ".$msg["author"]. " in type ".$type." - signed data: ".$signed_data." - Message: ".$msg["message"]." - Signature ".$parent_author_signature, LOGGER_DEBUG);
return false;
}
} else {
$relayed = false;
}
$key = self::key($fields->author);
if (!rsa_verify($signed_data, $author_signature, $key, "sha256")) {
logger("No valid author signature for author ".$fields->author. " in type ".$type." - signed data: ".$signed_data." - Message: ".$msg["message"]." - Signature ".$author_signature, LOGGER_DEBUG);
return false;
} else {
return array("fields" => $fields, "relayed" => $relayed);
}
}
/**
* @brief Fetches the public key for a given handle
*
* @param string $handle The handle
*
* @return string The public key
*/
private static function key($handle) {
$handle = strval($handle);
logger("Fetching diaspora key for: ".$handle);
$r = self::person_by_handle($handle);
if ($r)
return $r["pubkey"];
return "";
}
/**
* @brief Fetches data for a given handle
*
* @param string $handle The handle
*
* @return array the queried data
*/
public static function person_by_handle($handle) {
$r = q("SELECT * FROM `fcontact` WHERE `network` = '%s' AND `addr` = '%s' LIMIT 1",
dbesc(NETWORK_DIASPORA),
dbesc($handle)
);
if ($r) {
$person = $r[0];
logger("In cache ".print_r($r,true), LOGGER_DEBUG);
// 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"] == "")
$update = true;
}
if (!$person || $update) {
logger("create or refresh", LOGGER_DEBUG);
$r = probe_url($handle, PROBE_DIASPORA);
// Note that Friendica contacts will return a "Diaspora person"
// if Diaspora connectivity is enabled on their server
if ($r && ($r["network"] === NETWORK_DIASPORA)) {
self::add_fcontact($r, $update);
$person = $r;
}
}
return $person;
}
/**
* @brief Updates the fcontact table
*
* @param array $arr The fcontact data
* @param bool $update Update or insert?
*
* @return string The id of the fcontact entry
*/
private static function add_fcontact($arr, $update = false) {
if ($update) {
$r = q("UPDATE `fcontact` SET
`name` = '%s',
`photo` = '%s',
`request` = '%s',
`nick` = '%s',
`addr` = '%s',
`guid` = '%s',
`batch` = '%s',
`notify` = '%s',
`poll` = '%s',
`confirm` = '%s',
`alias` = '%s',
`pubkey` = '%s',
`updated` = '%s'
WHERE `url` = '%s' AND `network` = '%s'",
dbesc($arr["name"]),
dbesc($arr["photo"]),
dbesc($arr["request"]),
dbesc($arr["nick"]),
dbesc(strtolower($arr["addr"])),
dbesc($arr["guid"]),
dbesc($arr["batch"]),
dbesc($arr["notify"]),
dbesc($arr["poll"]),
dbesc($arr["confirm"]),
dbesc($arr["alias"]),
dbesc($arr["pubkey"]),
dbesc(datetime_convert()),
dbesc($arr["url"]),
dbesc($arr["network"])
);
} else {
$r = q("INSERT INTO `fcontact` (`url`,`name`,`photo`,`request`,`nick`,`addr`, `guid`,
`batch`, `notify`,`poll`,`confirm`,`network`,`alias`,`pubkey`,`updated`)
VALUES ('%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s')",
dbesc($arr["url"]),
dbesc($arr["name"]),
dbesc($arr["photo"]),
dbesc($arr["request"]),
dbesc($arr["nick"]),
dbesc($arr["addr"]),
dbesc($arr["guid"]),
dbesc($arr["batch"]),
dbesc($arr["notify"]),
dbesc($arr["poll"]),
dbesc($arr["confirm"]),
dbesc($arr["network"]),
dbesc($arr["alias"]),
dbesc($arr["pubkey"]),
dbesc(datetime_convert())
);
}
return $r;
}
/**
* @brief get a handle (user@domain.tld) from a given contact id or gcontact id
*
* @param int $contact_id The id in the contact table
* @param int $gcontact_id The id in the gcontact table
*
* @return string the handle
*/
public static function handle_from_contact($contact_id, $gcontact_id = 0) {
$handle = false;
logger("contact id is ".$contact_id." - gcontact id is ".$gcontact_id, LOGGER_DEBUG);
if ($gcontact_id != 0) {
$r = q("SELECT `addr` FROM `gcontact` WHERE `id` = %d AND `addr` != ''",
intval($gcontact_id));
if (dbm::is_result($r)) {
return strtolower($r[0]["addr"]);
}
}
$r = q("SELECT `network`, `addr`, `self`, `url`, `nick` FROM `contact` WHERE `id` = %d",
intval($contact_id));
if (dbm::is_result($r)) {
$contact = $r[0];
logger("contact 'self' = ".$contact['self']." 'url' = ".$contact['url'], LOGGER_DEBUG);
if ($contact['addr'] != "") {
$handle = $contact['addr'];
} else {
$baseurl_start = strpos($contact['url'],'://') + 3;
$baseurl_length = strpos($contact['url'],'/profile') - $baseurl_start; // allows installations in a subdirectory--not sure how Diaspora will handle
$baseurl = substr($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 $fcontact_guid Hexadecimal string guid
*
* @return string the contact url or null
*/
public static function url_from_contact_guid($fcontact_guid) {
logger("fcontact guid is ".$fcontact_guid, LOGGER_DEBUG);
$r = q("SELECT `url` FROM `fcontact` WHERE `url` != '' AND `network` = '%s' AND `guid` = '%s'",
dbesc(NETWORK_DIASPORA),
dbesc($fcontact_guid)
);
if (dbm::is_result($r)) {
return $r[0]['url'];
}
return null;
}
/**
* @brief Get a contact id for a given handle
*
* @param int $uid The user id
* @param string $handle The handle in the format user@domain.tld
*
* @return The contact id
*/
private static function contact_by_handle($uid, $handle) {
// First do a direct search on the contact table
$r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `addr` = '%s' LIMIT 1",
intval($uid),
dbesc($handle)
);
if (dbm::is_result($r)) {
return $r[0];
} else {
/*
* We haven't found it?
* We use another function for it that will possibly create a contact entry.
*/
$cid = get_contact($handle, $uid);
if ($cid > 0) {
/// @TODO Contact retrieval should be encapsulated into an "entity" class like `Contact`
$r = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1", intval($cid));
if (dbm::is_result($r)) {
return $r[0];
}
}
}
$handle_parts = explode("@", $handle);
$nurl_sql = "%%://".$handle_parts[1]."%%/profile/".$handle_parts[0];
$r = q("SELECT * FROM `contact` WHERE `network` = '%s' AND `uid` = %d AND `nurl` LIKE '%s' LIMIT 1",
dbesc(NETWORK_DFRN),
intval($uid),
dbesc($nurl_sql)
);
if (dbm::is_result($r)) {
return $r[0];
}
logger("Haven't found contact for user ".$uid." and handle ".$handle, LOGGER_DEBUG);
return false;
}
/**
* @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 $is_comment Is the check for a comment?
*
* @return bool is the contact allowed to post?
*/
private static function post_allow($importer, $contact, $is_comment = false) {
/*
* Perhaps we were already sharing with this person. Now they're sharing with us.
* That makes us friends.
* Normally this should have handled by getting a request - but this could get lost
*/
if ($contact["rel"] == CONTACT_IS_FOLLOWER && in_array($importer["page-flags"], array(PAGE_FREELOVE))) {
dba::update('contact', array('rel' => CONTACT_IS_FRIEND, 'writable' => true),
array('id' => $contact["id"], 'uid' => $contact["uid"]));
$contact["rel"] = CONTACT_IS_FRIEND;
logger("defining user ".$contact["nick"]." as friend");
}
// We don't seem to like that person
if ($contact["blocked"] || $contact["readonly"] || $contact["archive"]) {
// Maybe blocked, don't accept.
return false;
// We are following this person?
} elseif (($contact["rel"] == CONTACT_IS_SHARING) || ($contact["rel"] == CONTACT_IS_FRIEND)) {
// Yes, then it is fine.
return true;
// Is it a post to a community?
} elseif (($contact["rel"] == CONTACT_IS_FOLLOWER) && ($importer["page-flags"] == PAGE_COMMUNITY)) {
// That's good
return true;
// Is the message a global user or a comment?
} elseif (($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 $is_comment Is the check for a comment?
*
* @return array The contact data
*/
private static function allowed_contact_by_handle($importer, $handle, $is_comment = false) {
$contact = self::contact_by_handle($importer["uid"], $handle);
if (!$contact) {
logger("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) {
return $importer;
} else {
return false;
}
}
if (!self::post_allow($importer, $contact, $is_comment)) {
logger("The handle: ".$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 $guid The guid of the message
*
* @return int|bool message id if the message already was stored into the system - or false.
*/
private static function message_exists($uid, $guid) {
$r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
intval($uid),
dbesc($guid)
);
if (dbm::is_result($r)) {
logger("message ".$guid." already exists for user ".$uid);
return $r[0]["id"];
}
return false;
}
/**
* @brief Checks for links to posts in a message
*
* @param array $item The item array
*/
private static function fetch_guid($item) {
$expression = "=diaspora://.*?/post/([0-9A-Za-z\-_@.:]{15,254}[0-9A-Za-z])=ism";
preg_replace_callback($expression,
function ($match) use ($item) {
return self::fetch_guid_sub($match, $item);
}, $item["body"]);
preg_replace_callback("&\[url=/posts/([^\[\]]*)\](.*)\[\/url\]&Usi",
function ($match) use ($item) {
return self::fetch_guid_sub($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 $author_link The author link for missing local contact fallback
*
* @return the replaced string
*/
public static function replace_people_guid($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'
$handle = self::url_from_contact_guid($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 "fetch_guid" which checks for links in messages
*
* @param array $match array containing a link that has to be checked for a message link
* @param array $item The item array
*/
private static function fetch_guid_sub($match, $item) {
if (!self::store_by_guid($match[1], $item["author-link"]))
self::store_by_guid($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 $uid The user id of the user
*
* @return int the message id of the stored message or false
*/
private static function store_by_guid($guid, $server, $uid = 0) {
$serverparts = parse_url($server);
$server = $serverparts["scheme"]."://".$serverparts["host"];
logger("Trying to fetch item ".$guid." from ".$server, LOGGER_DEBUG);
$msg = self::message($guid, $server);
if (!$msg)
return false;
logger("Successfully fetched item ".$guid." from ".$server, LOGGER_DEBUG);
// Now call the dispatcher
return self::dispatch_public($msg);
}
/**
* @brief Fetches a message from a server
*
* @param string $guid message guid
* @param string $server The url of the server
* @param int $level Endless loop prevention
*
* @return array
* 'message' => The message XML
* 'author' => The author handle
* 'key' => The public key of the author
*/
private static function message($guid, $server, $level = 0) {
if ($level > 5)
return false;
// This will work for new Diaspora servers and Friendica servers from 3.5
$source_url = $server."/fetch/post/".$guid;
logger("Fetch post from ".$source_url, LOGGER_DEBUG);
$envelope = fetch_url($source_url);
if ($envelope) {
logger("Envelope was fetched.", LOGGER_DEBUG);
$x = self::verify_magic_envelope($envelope);
if (!$x)
logger("Envelope could not be verified.", LOGGER_DEBUG);
else
logger("Envelope was verified.", LOGGER_DEBUG);
} else
$x = false;
// This will work for older Diaspora and Friendica servers
if (!$x) {
$source_url = $server."/p/".$guid.".xml";
logger("Fetch post from ".$source_url, LOGGER_DEBUG);
$x = fetch_url($source_url);
if (!$x)
return false;
}
$source_xml = parse_xml_string($x, false);
if (!is_object($source_xml))
return false;
if ($source_xml->post->reshare) {
// Reshare of a reshare - old Diaspora version
logger("Message is a reshare", LOGGER_DEBUG);
return self::message($source_xml->post->reshare->root_guid, $server, ++$level);
} elseif ($source_xml->getName() == "reshare") {
// Reshare of a reshare - new Diaspora version
logger("Message is a new reshare", LOGGER_DEBUG);
return self::message($source_xml->root_guid, $server, ++$level);
}
$author = "";
// Fetch the author - for the old and the new Diaspora version
if ($source_xml->post->status_message->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("Message doesn't seem to be a status message", LOGGER_DEBUG);
return false;
}
$msg = array("message" => $x, "author" => $author);
$msg["key"] = self::key($msg["author"]);
return $msg;
}
/**
* @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 $contact The contact of the item owner
*
* @return array the item record
*/
private static function parent_item($uid, $guid, $author, $contact) {
$r = q("SELECT `id`, `parent`, `body`, `wall`, `uri`, `guid`, `private`, `origin`,
`author-name`, `author-link`, `author-avatar`,
`owner-name`, `owner-link`, `owner-avatar`
FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
intval($uid), dbesc($guid));
if (!$r) {
$result = self::store_by_guid($guid, $contact["url"], $uid);
if (!$result) {
$person = self::person_by_handle($author);
$result = self::store_by_guid($guid, $person["url"], $uid);
}
if ($result) {
logger("Fetched missing item ".$guid." - result: ".$result, LOGGER_DEBUG);
$r = q("SELECT `id`, `body`, `wall`, `uri`, `private`, `origin`,
`author-name`, `author-link`, `author-avatar`,
`owner-name`, `owner-link`, `owner-avatar`
FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
intval($uid), dbesc($guid));
}
}
if (!$r) {
logger("parent item not found: parent: ".$guid." - user: ".$uid);
return false;
} else {
logger("parent item found: parent: ".$guid." - user: ".$uid);
return $r[0];
}
}
/**
* @brief returns contact details
*
* @param array $contact The default contact if the person isn't found
* @param array $person The record of the person
* @param int $uid The user id
*
* @return array
* 'cid' => contact id
* 'network' => network type
*/
private static function author_contact_by_url($contact, $person, $uid) {
$r = q("SELECT `id`, `network`, `url` FROM `contact` WHERE `nurl` = '%s' AND `uid` = %d LIMIT 1",
dbesc(normalise_link($person["url"])), intval($uid));
if ($r) {
$cid = $r[0]["id"];
$network = $r[0]["network"];
// We are receiving content from a user that possibly is about to be terminated
// This means the user is vital, so we remove a possible termination date.
unmark_for_death($r[0]);
} else {
$cid = $contact["id"];
$network = NETWORK_DIASPORA;
}
return array("cid" => $cid, "network" => $network);
}
/**
* @brief Is the profile a hubzilla profile?
*
* @param string $url The profile link
*
* @return bool is it a hubzilla server?
*/
public static function is_redmatrix($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 $guid message guid
*
* @return string the post link
*/
private static function plink($addr, $guid, $parent_guid = '') {
$r = q("SELECT `url`, `nick`, `network` FROM `fcontact` WHERE `addr`='%s' LIMIT 1", dbesc($addr));
// Fallback
if (!dbm::is_result($r)) {
if ($parent_guid != '') {
return "https://".substr($addr,strpos($addr,"@") + 1)."/posts/".$parent_guid."#".$guid;
} else {
return "https://".substr($addr,strpos($addr,"@") + 1)."/posts/".$guid;
}
}
// Friendica contacts are often detected as Diaspora contacts in the "fcontact" table
// So we try another way as well.
$s = q("SELECT `network` FROM `gcontact` WHERE `nurl`='%s' LIMIT 1", dbesc(normalise_link($r[0]["url"])));
if (dbm::is_result($s)) {
$r[0]["network"] = $s[0]["network"];
}
if ($r[0]["network"] == NETWORK_DFRN) {
return str_replace("/profile/".$r[0]["nick"]."/", "/display/".$guid, $r[0]["url"]."/");
}
if (self::is_redmatrix($r[0]["url"])) {
return $r[0]["url"]."/?f=&mid=".$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 Processes an account deletion
*
* @param array $importer Array of the importer user
* @param object $data The message object
*
* @return bool Success
*/
private static function receive_account_deletion($importer, $data) {
/// @todo Account deletion should remove the contact from the global contacts as well
$author = notags(unxmlify($data->author));
$contact = self::contact_by_handle($importer["uid"], $author);
if (!$contact) {
logger("cannot find contact for author: ".$author);
return false;
}
// We now remove the contact
contact_remove($contact["id"]);
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 $onlyfound Only return uri when found in the database
*
* @return string The constructed uri or the one from our database
*/
private static function get_uri_from_guid($author, $guid, $onlyfound = false) {
$r = q("SELECT `uri` FROM `item` WHERE `guid` = '%s' LIMIT 1", dbesc($guid));
if (dbm::is_result($r)) {
return $r[0]["uri"];
} elseif (!$onlyfound) {
return $author.":".$guid;
}
return "";
}
/**
* @brief Fetch the guid from our database with a given uri
*
* @param string $author Author handle
* @param string $uri Message uri
*
* @return string The post guid
*/
private static function get_guid_from_uri($uri, $uid) {
$r = q("SELECT `guid` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1", dbesc($uri), intval($uid));
if (dbm::is_result($r)) {
return $r[0]["guid"];
} else {
return false;
}
}
/**
* @brief Find the best importer for a comment, like, ...
*
* @param string $guid The guid of the item
*
* @return array|boolean the origin owner of that post - or false
*/
private static function importer_for_guid($guid) {
$item = dba::fetch_first("SELECT `uid` FROM `item` WHERE `origin` AND `guid` = ? LIMIT 1", $guid);
if (dbm::is_result($item)) {
logger("Found user ".$item['uid']." as owner of item ".$guid, LOGGER_DEBUG);
$contact = dba::fetch_first("SELECT * FROM `contact` WHERE `self` AND `uid` = ?", $item['uid']);
if (dbm::is_result($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 $xml The original XML of the message
*
* @return int The message id of the generated comment or "false" if there was an error
*/
private static function receive_comment($importer, $sender, $data, $xml) {
$author = notags(unxmlify($data->author));
$guid = notags(unxmlify($data->guid));
$parent_guid = notags(unxmlify($data->parent_guid));
$text = unxmlify($data->text);
if (isset($data->created_at)) {
$created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at)));
} else {
$created_at = datetime_convert();
}
if (isset($data->thread_parent_guid)) {
$thread_parent_guid = notags(unxmlify($data->thread_parent_guid));
$thr_uri = self::get_uri_from_guid("", $thread_parent_guid, true);
} else {
$thr_uri = "";
}
$contact = self::allowed_contact_by_handle($importer, $sender, true);
if (!$contact) {
return false;
}
$message_id = self::message_exists($importer["uid"], $guid);
if ($message_id) {
return true;
}
$parent_item = self::parent_item($importer["uid"], $parent_guid, $author, $contact);
if (!$parent_item) {
return false;
}
$person = self::person_by_handle($author);
if (!is_array($person)) {
logger("unable to find author details");
return false;
}
// Fetch the contact id - if we know this contact
$author_contact = self::author_contact_by_url($contact, $person, $importer["uid"]);
$datarray = array();
$datarray["uid"] = $importer["uid"];
$datarray["contact-id"] = $author_contact["cid"];
$datarray["network"] = $author_contact["network"];
$datarray["author-name"] = $person["name"];
$datarray["author-link"] = $person["url"];
$datarray["author-avatar"] = ((x($person,"thumb")) ? $person["thumb"] : $person["photo"]);
$datarray["owner-name"] = $contact["name"];
$datarray["owner-link"] = $contact["url"];
$datarray["owner-avatar"] = ((x($contact,"thumb")) ? $contact["thumb"] : $contact["photo"]);
$datarray["guid"] = $guid;
$datarray["uri"] = self::get_uri_from_guid($author, $guid);
$datarray["type"] = "remote-comment";
$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_OBJ_COMMENT;
$datarray["protocol"] = PROTOCOL_DIASPORA;
$datarray["source"] = $xml;
$datarray["changed"] = $datarray["created"] = $datarray["edited"] = $created_at;
$datarray["plink"] = self::plink($author, $guid, $parent_item['guid']);
$body = diaspora2bb($text);
$datarray["body"] = self::replace_people_guid($body, $person["url"]);
self::fetch_guid($datarray);
$message_id = item_store($datarray);
if ($message_id <= 0) {
return false;
}
if ($message_id) {
logger("Stored comment ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG);
}
// If we are the origin of the parent we store the original data and notify our followers
if ($message_id && $parent_item["origin"]) {
// Formerly we stored the signed text, the signature and the author in different fields.
// We now store the raw data so that we are more flexible.
dba::insert('sign', array('iid' => $message_id, 'signed_text' => json_encode($data)));
// notify others
proc_run(PRIORITY_HIGH, "include/notifier.php", "comment-import", $message_id);
}
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 $conversation The conversation record to which this message belongs
*
* @return bool "true" if it was successful
*/
private static function receive_conversation_message($importer, $contact, $data, $msg, $mesg, $conversation) {
$author = notags(unxmlify($data->author));
$guid = notags(unxmlify($data->guid));
$subject = notags(unxmlify($data->subject));
// "diaspora_handle" is the element name from the old version
// "author" is the element name from the new version
if ($mesg->author) {
$msg_author = notags(unxmlify($mesg->author));
} elseif ($mesg->diaspora_handle) {
$msg_author = notags(unxmlify($mesg->diaspora_handle));
} else {
return false;
}
$msg_guid = notags(unxmlify($mesg->guid));
$msg_conversation_guid = notags(unxmlify($mesg->conversation_guid));
$msg_text = unxmlify($mesg->text);
$msg_created_at = datetime_convert("UTC", "UTC", notags(unxmlify($mesg->created_at)));
if ($msg_conversation_guid != $guid) {
logger("message conversation guid does not belong to the current conversation.");
return false;
}
$body = diaspora2bb($msg_text);
$message_uri = $msg_author.":".$msg_guid;
$person = self::person_by_handle($msg_author);
dba::lock('mail');
$r = q("SELECT `id` FROM `mail` WHERE `guid` = '%s' AND `uid` = %d LIMIT 1",
dbesc($msg_guid),
intval($importer["uid"])
);
if (dbm::is_result($r)) {
logger("duplicate message already delivered.", LOGGER_DEBUG);
return false;
}
q("INSERT INTO `mail` (`uid`, `guid`, `convid`, `from-name`,`from-photo`,`from-url`,`contact-id`,`title`,`body`,`seen`,`reply`,`uri`,`parent-uri`,`created`)
VALUES (%d, '%s', %d, '%s', '%s', '%s', %d, '%s', '%s', %d, %d, '%s','%s','%s')",
intval($importer["uid"]),
dbesc($msg_guid),
intval($conversation["id"]),
dbesc($person["name"]),
dbesc($person["photo"]),
dbesc($person["url"]),
intval($contact["id"]),
dbesc($subject),
dbesc($body),
0,
0,
dbesc($message_uri),
dbesc($author.":".$guid),
dbesc($msg_created_at)
);
dba::unlock();
dba::update('conv', array('updated' => datetime_convert()), array('id' => $conversation["id"]));
notification(array(
"type" => NOTIFY_MAIL,
"notify_flags" => $importer["notify-flags"],
"language" => $importer["language"],
"to_name" => $importer["username"],
"to_email" => $importer["email"],
"uid" =>$importer["uid"],
"item" => array("subject" => $subject, "body" => $body),
"source_name" => $person["name"],
"source_link" => $person["url"],
"source_photo" => $person["thumb"],
"verb" => ACTIVITY_POST,
"otype" => "mail"
));
return true;
}
/**
* @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 $data The message object
*
* @return bool Success
*/
private static function receive_conversation($importer, $msg, $data) {
$author = notags(unxmlify($data->author));
$guid = notags(unxmlify($data->guid));
$subject = notags(unxmlify($data->subject));
$created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at)));
$participants = notags(unxmlify($data->participants));
$messages = $data->message;
if (!count($messages)) {
logger("empty conversation");
return false;
}
$contact = self::allowed_contact_by_handle($importer, $msg["author"], true);
if (!$contact)
return false;
$conversation = null;
$c = q("SELECT * FROM `conv` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
intval($importer["uid"]),
dbesc($guid)
);
if ($c)
$conversation = $c[0];
else {
$r = q("INSERT INTO `conv` (`uid`, `guid`, `creator`, `created`, `updated`, `subject`, `recips`)
VALUES (%d, '%s', '%s', '%s', '%s', '%s', '%s')",
intval($importer["uid"]),
dbesc($guid),
dbesc($author),
dbesc($created_at),
dbesc(datetime_convert()),
dbesc($subject),
dbesc($participants)
);
if ($r)
$c = q("SELECT * FROM `conv` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
intval($importer["uid"]),
dbesc($guid)
);
if ($c)
$conversation = $c[0];
}
if (!$conversation) {
logger("unable to create conversation.");
return false;
}
foreach ($messages as $mesg)
self::receive_conversation_message($importer, $contact, $data, $msg, $mesg, $conversation);
return true;
}
/**
* @brief Creates the body for a "like" message
*
* @param array $contact The contact that send us the "like"
* @param array $parent_item The item array of the parent item
* @param string $guid message guid
*
* @return string the body
*/
private static function construct_like_body($contact, $parent_item, $guid) {
$bodyverb = t('%1$s likes %2$s\'s %3$s');
$ulink = "[url=".$contact["url"]."]".$contact["name"]."[/url]";
$alink = "[url=".$parent_item["author-link"]."]".$parent_item["author-name"]."[/url]";
$plink = "[url=".System::baseUrl()."/display/".urlencode($guid)."]".t("status")."[/url]";
return sprintf($bodyverb, $ulink, $alink, $plink);
}
/**
* @brief Creates a XML object for a "like"
*
* @param array $importer Array of the importer user
* @param array $parent_item The item array of the parent item
*
* @return string The XML
*/
private static function construct_like_object($importer, $parent_item) {
$objtype = ACTIVITY_OBJ_NOTE;
$link = '<link rel="alternate" type="text/html" href="'.System::baseUrl()."/display/".$importer["nickname"]."/".$parent_item["id"].'" />';
$parent_body = $parent_item["body"];
$xmldata = array("object" => array("type" => $objtype,
"local" => "1",
"id" => $parent_item["uri"],
"link" => $link,
"title" => "",
"content" => $parent_body));
return xml::from_array($xmldata, $xml, true);
}
/**
* @brief Processes "like" messages
*
* @param array $importer Array of the importer user
* @param string $sender The sender of the message
* @param object $data The message object
*
* @return int The message id of the generated like or "false" if there was an error
*/
private static function receive_like($importer, $sender, $data) {
$author = notags(unxmlify($data->author));
$guid = notags(unxmlify($data->guid));
$parent_guid = notags(unxmlify($data->parent_guid));
$parent_type = notags(unxmlify($data->parent_type));
$positive = notags(unxmlify($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, array("Post", "Comment")))
return false;
$contact = self::allowed_contact_by_handle($importer, $sender, true);
if (!$contact)
return false;
$message_id = self::message_exists($importer["uid"], $guid);
if ($message_id)
return true;
$parent_item = self::parent_item($importer["uid"], $parent_guid, $author, $contact);
if (!$parent_item)
return false;
$person = self::person_by_handle($author);
if (!is_array($person)) {
logger("unable to find author details");
return false;
}
// Fetch the contact id - if we know this contact
$author_contact = self::author_contact_by_url($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 = array();
$datarray["protocol"] = PROTOCOL_DIASPORA;
$datarray["uid"] = $importer["uid"];
$datarray["contact-id"] = $author_contact["cid"];
$datarray["network"] = $author_contact["network"];
$datarray["author-name"] = $person["name"];
$datarray["author-link"] = $person["url"];
$datarray["author-avatar"] = ((x($person,"thumb")) ? $person["thumb"] : $person["photo"]);
$datarray["owner-name"] = $contact["name"];
$datarray["owner-link"] = $contact["url"];
$datarray["owner-avatar"] = ((x($contact,"thumb")) ? $contact["thumb"] : $contact["photo"]);
$datarray["guid"] = $guid;
$datarray["uri"] = self::get_uri_from_guid($author, $guid);
$datarray["type"] = "activity";
$datarray["verb"] = $verb;
$datarray["gravity"] = GRAVITY_LIKE;
$datarray["parent-uri"] = $parent_item["uri"];
$datarray["object-type"] = ACTIVITY_OBJ_NOTE;
$datarray["object"] = self::construct_like_object($importer, $parent_item);
$datarray["body"] = self::construct_like_body($contact, $parent_item, $guid);
$message_id = item_store($datarray);
if ($message_id <= 0) {
return false;
}
if ($message_id) {
logger("Stored like ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG);
}
// like on comments have the comment as parent. So we need to fetch the toplevel parent
if ($parent_item["id"] != $parent_item["parent"]) {
$toplevel = dba::select('item', array('origin'), array('id' => $parent_item["parent"]), array('limit' => 1));
$origin = $toplevel["origin"];
} else {
$origin = $parent_item["origin"];
}
// If we are the origin of the parent we store the original data and notify our followers
if ($message_id && $origin) {
// Formerly we stored the signed text, the signature and the author in different fields.
// We now store the raw data so that we are more flexible.
dba::insert('sign', array('iid' => $message_id, 'signed_text' => json_encode($data)));
// notify others
proc_run(PRIORITY_HIGH, "include/notifier.php", "comment-import", $message_id);
}
return true;
}
/**
* @brief Processes private messages
*
* @param array $importer Array of the importer user
* @param object $data The message object
*
* @return bool Success?
*/
private static function receive_message($importer, $data) {
$author = notags(unxmlify($data->author));
$guid = notags(unxmlify($data->guid));
$conversation_guid = notags(unxmlify($data->conversation_guid));
$text = unxmlify($data->text);
$created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at)));
$contact = self::allowed_contact_by_handle($importer, $author, true);
if (!$contact) {
return false;
}
$conversation = null;
$c = q("SELECT * FROM `conv` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
intval($importer["uid"]),
dbesc($conversation_guid)
);
if ($c) {
$conversation = $c[0];
} else {
logger("conversation not available.");
return false;
}
$message_uri = $author.":".$guid;
$person = self::person_by_handle($author);
if (!$person) {
logger("unable to find author details");
return false;
}
$body = diaspora2bb($text);
$body = self::replace_people_guid($body, $person["url"]);
dba::lock('mail');
$r = q("SELECT `id` FROM `mail` WHERE `guid` = '%s' AND `uid` = %d LIMIT 1",
dbesc($guid),
intval($importer["uid"])
);
if (dbm::is_result($r)) {
logger("duplicate message already delivered.", LOGGER_DEBUG);
return false;
}
q("INSERT INTO `mail` (`uid`, `guid`, `convid`, `from-name`,`from-photo`,`from-url`,`contact-id`,`title`,`body`,`seen`,`reply`,`uri`,`parent-uri`,`created`)
VALUES ( %d, '%s', %d, '%s', '%s', '%s', %d, '%s', '%s', %d, %d, '%s','%s','%s')",
intval($importer["uid"]),
dbesc($guid),
intval($conversation["id"]),
dbesc($person["name"]),
dbesc($person["photo"]),
dbesc($person["url"]),
intval($contact["id"]),
dbesc($conversation["subject"]),
dbesc($body),
0,
1,
dbesc($message_uri),
dbesc($author.":".$conversation["guid"]),
dbesc($created_at)
);
dba::unlock();
dba::update('conv', array('updated' => datetime_convert()), array('id' => $conversation["id"]));
return true;
}
/**
* @brief Processes participations - unsupported by now
*
* @param array $importer Array of the importer user
* @param object $data The message object
*
* @return bool always true
*/
private static function receive_participation($importer, $data) {
// I'm not sure if we can fully support this message type
return true;
}
/**
* @brief Processes photos - unneeded
*
* @param array $importer Array of the importer user
* @param object $data The message object
*
* @return bool always true
*/
private static function receive_photo($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 $data The message object
*
* @return bool always true
*/
private static function receive_poll_participation($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 $data The message object
*
* @return bool Success
*/
private static function receive_profile($importer, $data) {
$author = strtolower(notags(unxmlify($data->author)));
$contact = self::contact_by_handle($importer["uid"], $author);
if (!$contact)
return false;
$name = unxmlify($data->first_name).((strlen($data->last_name)) ? " ".unxmlify($data->last_name) : "");
$image_url = unxmlify($data->image_url);
$birthday = unxmlify($data->birthday);
$gender = unxmlify($data->gender);
$about = diaspora2bb(unxmlify($data->bio));
$location = diaspora2bb(unxmlify($data->location));
$searchable = (unxmlify($data->searchable) == "true");
$nsfw = (unxmlify($data->nsfw) == "true");
$tags = unxmlify($data->tag_string);
$tags = explode("#", $tags);
$keywords = array();
foreach ($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].$image_url;
update_contact_avatar($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 = datetime_convert("UTC", "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"];
$r = q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `addr` = '%s', `name-date` = '%s', `bd` = '%s',
`location` = '%s', `about` = '%s', `keywords` = '%s', `gender` = '%s' WHERE `id` = %d AND `uid` = %d",
dbesc($name),
dbesc($nick),
dbesc($author),
dbesc(datetime_convert()),
dbesc($birthday),
dbesc($location),
dbesc($about),
dbesc($keywords),
dbesc($gender),
intval($contact["id"]),
intval($importer["uid"])
);
$gcontact = array("url" => $contact["url"], "network" => NETWORK_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);
$gcid = update_gcontact($gcontact);
link_gcontact($gcid, $importer["uid"], $contact["id"]);
logger("Profile of contact ".$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 $contact The contact that send the request
*/
private static function receive_request_make_friend($importer, $contact) {
$a = get_app();
if ($contact["rel"] == CONTACT_IS_SHARING) {
dba::update('contact', array('rel' => CONTACT_IS_FRIEND, 'writable' => true),
array('id' => $contact["id"], 'uid' => $importer["uid"]));
}
// send notification
$r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
intval($importer["uid"])
);
if ($r && !$r[0]["hide-friends"] && !$contact["hidden"] && intval(get_pconfig($importer["uid"], "system", "post_newfriend"))) {
$self = q("SELECT * FROM `contact` WHERE `self` AND `uid` = %d LIMIT 1",
intval($importer["uid"])
);
// they are not CONTACT_IS_FOLLOWER anymore but that's what we have in the array
if ($self && $contact["rel"] == CONTACT_IS_FOLLOWER) {
$arr = array();
$arr["protocol"] = PROTOCOL_DIASPORA;
$arr["uri"] = $arr["parent-uri"] = item_new_uri($a->get_hostname(), $importer["uid"]);
$arr["uid"] = $importer["uid"];
$arr["contact-id"] = $self[0]["id"];
$arr["wall"] = 1;
$arr["type"] = 'wall';
$arr["gravity"] = 0;
$arr["origin"] = 1;
$arr["author-name"] = $arr["owner-name"] = $self[0]["name"];
$arr["author-link"] = $arr["owner-link"] = $self[0]["url"];
$arr["author-avatar"] = $arr["owner-avatar"] = $self[0]["thumb"];
$arr["verb"] = ACTIVITY_FRIEND;
$arr["object-type"] = ACTIVITY_OBJ_PERSON;
$A = "[url=".$self[0]["url"]."]".$self[0]["name"]."[/url]";
$B = "[url=".$contact["url"]."]".$contact["name"]."[/url]";
$BPhoto = "[url=".$contact["url"]."][img]".$contact["thumb"]."[/img][/url]";
$arr["body"] = sprintf(t("%1$s is now friends with %2$s"), $A, $B)."\n\n\n".$Bphoto;
$arr["object"] = self::construct_new_friend_object($contact);
$arr["last-child"] = 1;
$arr["allow_cid"] = $user[0]["allow_cid"];
$arr["allow_gid"] = $user[0]["allow_gid"];
$arr["deny_cid"] = $user[0]["deny_cid"];
$arr["deny_gid"] = $user[0]["deny_gid"];
$i = item_store($arr);
if ($i)
proc_run(PRIORITY_HIGH, "include/notifier.php", "activity", $i);
}
}
}
/**
* @brief Creates a XML object for a "new friend" message
*
* @param array $contact Array of the contact
*
* @return string The XML
*/
private static function construct_new_friend_object($contact) {
$objtype = ACTIVITY_OBJ_PERSON;
$link = '<link rel="alternate" type="text/html" href="'.$contact["url"].'" />'."\n".
'<link rel="photo" type="image/jpeg" href="'.$contact["thumb"].'" />'."\n";
$xmldata = array("object" => array("type" => $objtype,
"title" => $contact["name"],
"id" => $contact["url"]."/".$contact["name"],
"link" => $link));
return xml::from_array($xmldata, $xml, true);
}
/**
* @brief Processes incoming sharing notification
*
* @param array $importer Array of the importer user
* @param object $data The message object
*
* @return bool Success
*/
private static function receive_contact_request($importer, $data) {
$author = unxmlify($data->author);
$recipient = unxmlify($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)) {
$following = (unxmlify($data->following) == "true");
} else {
$following = true;
}
if (isset($data->sharing)) {
$sharing = (unxmlify($data->sharing) == "true");
} else {
$sharing = true;
}
$contact = self::contact_by_handle($importer["uid"],$author);
// perhaps we were already sharing with this person. Now they're sharing with us.
// That makes us friends.
if ($contact) {
if ($following) {
logger("Author ".$author." (Contact ".$contact["id"].") wants to follow us.", LOGGER_DEBUG);
self::receive_request_make_friend($importer, $contact);
// refetch the contact array
$contact = self::contact_by_handle($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"], array(CONTACT_IS_FRIEND))) {
$u = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1", intval($importer["uid"]));
if ($u) {
logger("Sending share message to author ".$author." - Contact: ".$contact["id"]." - User: ".$importer["uid"], LOGGER_DEBUG);
$ret = self::send_share($u[0], $contact);
}
}
return true;
} else {
logger("Author ".$author." doesn't want to follow us anymore.", LOGGER_DEBUG);
lose_follower($importer, $contact);
return true;
}
}
if (!$following && $sharing && in_array($importer["page-flags"], array(PAGE_SOAPBOX, PAGE_NORMAL))) {
logger("Author ".$author." wants to share with us - but doesn't want to listen. Request is ignored.", LOGGER_DEBUG);
return false;
} elseif (!$following && !$sharing) {
logger("Author ".$author." doesn't want anything - and we don't know the author. Request is ignored.", LOGGER_DEBUG);
return false;
} elseif (!$following && $sharing) {
logger("Author ".$author." wants to share with us.", LOGGER_DEBUG);
} elseif ($following && $sharing) {
logger("Author ".$author." wants to have a bidirectional conection.", LOGGER_DEBUG);
} elseif ($following && !$sharing) {
logger("Author ".$author." wants to listen to us.", LOGGER_DEBUG);
}
$ret = self::person_by_handle($author);
if (!$ret || ($ret["network"] != NETWORK_DIASPORA)) {
logger("Cannot resolve diaspora handle ".$author." for ".$recipient);
return false;
}
$batch = (($ret["batch"]) ? $ret["batch"] : implode("/", array_slice(explode("/", $ret["url"]), 0, 3))."/receive/public");
$r = q("INSERT INTO `contact` (`uid`, `network`,`addr`,`created`,`url`,`nurl`,`batch`,`name`,`nick`,`photo`,`pubkey`,`notify`,`poll`,`blocked`,`priority`)
VALUES (%d, '%s', '%s', '%s', '%s','%s','%s','%s','%s','%s','%s','%s','%s',%d,%d)",
intval($importer["uid"]),
dbesc($ret["network"]),
dbesc($ret["addr"]),
datetime_convert(),
dbesc($ret["url"]),
dbesc(normalise_link($ret["url"])),
dbesc($batch),
dbesc($ret["name"]),
dbesc($ret["nick"]),
dbesc($ret["photo"]),
dbesc($ret["pubkey"]),
dbesc($ret["notify"]),
dbesc($ret["poll"]),
1,
2
);
// find the contact record we just created
$contact_record = self::contact_by_handle($importer["uid"],$author);
if (!$contact_record) {
logger("unable to locate newly created contact record.");
return;
}
logger("Author ".$author." was added as contact number ".$contact_record["id"].".", LOGGER_DEBUG);
$def_gid = get_default_group($importer['uid'], $ret["network"]);
if (intval($def_gid))
group_add_member($importer["uid"], "", $contact_record["id"], $def_gid);
update_contact_avatar($ret["photo"], $importer['uid'], $contact_record["id"], true);
if ($importer["page-flags"] == PAGE_NORMAL) {
logger("Sending intra message for author ".$author.".", LOGGER_DEBUG);
$hash = random_string().(string)time(); // Generate a confirm_key
$ret = q("INSERT INTO `intro` (`uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
VALUES (%d, %d, %d, %d, '%s', '%s', '%s')",
intval($importer["uid"]),
intval($contact_record["id"]),
0,
0,
dbesc(t("Sharing notification from Diaspora network")),
dbesc($hash),
dbesc(datetime_convert())
);
} else {
// automatic friend approval
logger("Does an automatic friend approval for author ".$author.".", LOGGER_DEBUG);
update_contact_avatar($contact_record["photo"],$importer["uid"],$contact_record["id"]);
// technically they are sharing with us (CONTACT_IS_SHARING),
// but if our page-type is PAGE_COMMUNITY or PAGE_SOAPBOX
// we are going to change the relationship and make them a follower.
if (($importer["page-flags"] == PAGE_FREELOVE) && $sharing && $following)
$new_relation = CONTACT_IS_FRIEND;
elseif (($importer["page-flags"] == PAGE_FREELOVE) && $sharing)
$new_relation = CONTACT_IS_SHARING;
else
$new_relation = CONTACT_IS_FOLLOWER;
$r = q("UPDATE `contact` SET `rel` = %d,
`name-date` = '%s',
`uri-date` = '%s',
`blocked` = 0,
`pending` = 0,
`writable` = 1
WHERE `id` = %d
",
intval($new_relation),
dbesc(datetime_convert()),
dbesc(datetime_convert()),
intval($contact_record["id"])
);
$u = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1", intval($importer["uid"]));
if ($u) {
logger("Sending share message (Relation: ".$new_relation.") to author ".$author." - Contact: ".$contact_record["id"]." - User: ".$importer["uid"], LOGGER_DEBUG);
$ret = self::send_share($u[0], $contact_record);
// Send the profile data, maybe it weren't transmitted before
self::send_profile($importer["uid"], array($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
* @param string $author handle of the sharer
*
* @return array The fetched item
*/
private static function original_item($guid, $orig_author, $author) {
// Do we already have this item?
$r = q("SELECT `body`, `tag`, `app`, `created`, `object-type`, `uri`, `guid`,
`author-name`, `author-link`, `author-avatar`
FROM `item` WHERE `guid` = '%s' AND `visible` AND NOT `deleted` AND `body` != '' LIMIT 1",
dbesc($guid));
if (dbm::is_result($r)) {
logger("reshared message ".$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::is_reshare($r[0]["body"], true)) {
$r = array();
} elseif (self::is_reshare($r[0]["body"], false)) {
$r[0]["body"] = diaspora2bb(bb2diaspora($r[0]["body"]));
$r[0]["body"] = self::replace_people_guid($r[0]["body"], $r[0]["author-link"]);
// Add OEmbed and other information to the body
$r[0]["body"] = add_page_info_to_body($r[0]["body"], false, true);
return $r[0];
} else {
return $r[0];
}
}
if (!dbm::is_result($r)) {
$server = "https://".substr($orig_author, strpos($orig_author, "@") + 1);
logger("1st try: reshared message ".$guid." will be fetched via SSL from the server ".$server);
$item_id = self::store_by_guid($guid, $server);
if (!$item_id) {
$server = "http://".substr($orig_author, strpos($orig_author, "@") + 1);
logger("2nd try: reshared message ".$guid." will be fetched without SLL from the server ".$server);
$item_id = self::store_by_guid($guid, $server);
}
if ($item_id) {
$r = q("SELECT `body`, `tag`, `app`, `created`, `object-type`, `uri`, `guid`,
`author-name`, `author-link`, `author-avatar`
FROM `item` WHERE `id` = %d AND `visible` AND NOT `deleted` AND `body` != '' LIMIT 1",
intval($item_id));
if (dbm::is_result($r)) {
// If it is a reshared post from another network then reformat to avoid display problems with two share elements
if (self::is_reshare($r[0]["body"], false)) {
$r[0]["body"] = diaspora2bb(bb2diaspora($r[0]["body"]));
$r[0]["body"] = self::replace_people_guid($r[0]["body"], $r[0]["author-link"]);
}
return $r[0];
}
}
}
return false;
}
/**
* @brief Processes a reshare message
*
* @param array $importer Array of the importer user
* @param object $data The message object
* @param string $xml The original XML of the message
*
* @return int the message id
*/
private static function receive_reshare($importer, $data, $xml) {
$author = notags(unxmlify($data->author));
$guid = notags(unxmlify($data->guid));
$created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at)));
$root_author = notags(unxmlify($data->root_author));
$root_guid = notags(unxmlify($data->root_guid));
/// @todo handle unprocessed property "provider_display_name"
$public = notags(unxmlify($data->public));
$contact = self::allowed_contact_by_handle($importer, $author, false);
if (!$contact) {
return false;
}
$message_id = self::message_exists($importer["uid"], $guid);
if ($message_id) {
return true;
}
$original_item = self::original_item($root_guid, $root_author, $author);
if (!$original_item) {
return false;
}
$orig_url = System::baseUrl()."/display/".$original_item["guid"];
$datarray = array();
$datarray["uid"] = $importer["uid"];
$datarray["contact-id"] = $contact["id"];
$datarray["network"] = NETWORK_DIASPORA;
$datarray["author-name"] = $contact["name"];
$datarray["author-link"] = $contact["url"];
$datarray["author-avatar"] = ((x($contact,"thumb")) ? $contact["thumb"] : $contact["photo"]);
$datarray["owner-name"] = $datarray["author-name"];
$datarray["owner-link"] = $datarray["author-link"];
$datarray["owner-avatar"] = $datarray["author-avatar"];
$datarray["guid"] = $guid;
$datarray["uri"] = $datarray["parent-uri"] = self::get_uri_from_guid($author, $guid);
$datarray["verb"] = ACTIVITY_POST;
$datarray["gravity"] = GRAVITY_PARENT;
$datarray["protocol"] = PROTOCOL_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);
$datarray["body"] = $prefix.$original_item["body"]."[/share]";
$datarray["tag"] = $original_item["tag"];
$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"] = $original_item["object-type"];
self::fetch_guid($datarray);
$message_id = item_store($datarray);
if ($message_id) {
logger("Stored reshare ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG);
return true;
} else {
return false;
}
}
/**
* @brief Processes retractions
*
* @param array $importer Array of the importer user
* @param array $contact The contact of the item owner
* @param object $data The message object
*
* @return bool success
*/
private static function item_retraction($importer, $contact, $data) {
$author = notags(unxmlify($data->author));
$target_guid = notags(unxmlify($data->target_guid));
$target_type = notags(unxmlify($data->target_type));
$person = self::person_by_handle($author);
if (!is_array($person)) {
logger("unable to find author detail for ".$author);
return false;
}
if (empty($contact["url"])) {
$contact["url"] = $person["url"];
}
// Fetch items that are about to be deleted
$fields = array('uid', 'id', 'parent', 'parent-uri', 'author-link');
// When we receive a public retraction, we delete every item that we find.
if ($importer['uid'] == 0) {
$condition = array("`guid` = ? AND NOT `file` LIKE '%%[%%' AND NOT `deleted`", $target_guid);
} else {
$condition = array("`guid` = ? AND `uid` = ? AND NOT `file` LIKE '%%[%%' AND NOT `deleted`", $target_guid, $importer['uid']);
}
$r = dba::select('item', $fields, $condition);
if (!dbm::is_result($r)) {
logger("Target guid ".$target_guid." was not found on this system for user ".$importer['uid'].".");
return false;
}
while ($item = dba::fetch($r)) {
// Fetch the parent item
$parent = dba::select('item', array('author-link', 'origin'), array('id' => $item["parent"]), array('limit' => 1));
// Only delete it if the parent author really fits
if (!link_compare($parent["author-link"], $contact["url"]) && !link_compare($item["author-link"], $contact["url"])) {
logger("Thread author ".$parent["author-link"]." and item author ".$item["author-link"]." don't fit to expected contact ".$contact["url"], LOGGER_DEBUG);
continue;
}
// Currently we don't have a central deletion function that we could use in this case. The function "item_drop" doesn't work for that case
dba::update('item', array('deleted' => true, 'title' => '', 'body' => '',
'edited' => datetime_convert(), 'changed' => datetime_convert()),
array('id' => $item["id"]));
// Delete the thread - if it is a starting post and not a comment
if ($target_type != 'Comment') {
delete_thread($item["id"], $item["parent-uri"]);
}
logger("Deleted target ".$target_guid." (".$item["id"].") from user ".$item["uid"]." parent: ".$item["parent"], LOGGER_DEBUG);
// Now check if the retraction needs to be relayed by us
if ($parent["origin"]) {
// notify others
proc_run(PRIORITY_HIGH, "include/notifier.php", "drop", $item["id"]);
}
}
return true;
}
/**
* @brief Receives retraction messages
*
* @param array $importer Array of the importer user
* @param string $sender The sender of the message
* @param object $data The message object
*
* @return bool Success
*/
private static function receive_retraction($importer, $sender, $data) {
$target_type = notags(unxmlify($data->target_type));
$contact = self::contact_by_handle($importer["uid"], $sender);
if (!$contact && (in_array($target_type, array("Contact", "Person")))) {
logger("cannot find contact for sender: ".$sender." and user ".$importer["uid"]);
return false;
}
logger("Got retraction for ".$target_type.", sender ".$sender." and user ".$importer["uid"],