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https://codeberg.org/streams/streams.git
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3257 lines
99 KiB
PHP
3257 lines
99 KiB
PHP
<?php
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namespace Zotlabs\Lib;
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/**
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* @brief lowlevel implementation of Zot6 protocol.
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*
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*/
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use App;
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use Zotlabs\Web\HTTPSig;
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use Zotlabs\Access\Permissions;
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use Zotlabs\Access\PermissionLimits;
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use Zotlabs\Access\PermissionRoles;
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use Zotlabs\Daemon\Master;
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class Libzot {
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/**
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* @brief Generates a unique string for use as a zot guid.
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*
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* Generates a unique string for use as a zot guid using our DNS-based url, the
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* channel nickname and some entropy.
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* The entropy ensures uniqueness against re-installs where the same URL and
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* nickname are chosen.
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*
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* @note zot doesn't require this to be unique. Internally we use a whirlpool
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* hash of this guid and the signature of this guid signed with the channel
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* private key. This can be verified and should make the probability of
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* collision of the verified result negligible within the constraints of our
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* immediate universe.
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*
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* @param string $channel_nick a unique nickname of controlling entity
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* @returns string
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*/
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static function new_uid($channel_nick) {
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$rawstr = z_root() . '/' . $channel_nick . '.' . mt_rand();
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return(base64url_encode(hash('whirlpool', $rawstr, true), true));
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}
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/**
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* @brief Generates a portable hash identifier for a channel.
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*
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* Generates a portable hash identifier for the channel identified by $guid and
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* $pubkey.
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*
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* @note This ID is portable across the network but MUST be calculated locally
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* by verifying the signature and can not be trusted as an identity.
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*
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* @param string $guid
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* @param string $pubkey
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*/
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static function make_xchan_hash($guid, $pubkey) {
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return base64url_encode(hash('whirlpool', $guid . $pubkey, true));
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}
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/**
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* @brief Given a zot hash, return all distinct hubs.
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*
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* This function is used in building the zot discovery packet and therefore
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* should only be used by channels which are defined on this hub.
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*
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* @param string $hash - xchan_hash
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* @returns array of hubloc (hub location structures)
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*
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*/
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static function get_hublocs($hash) {
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/* Only search for active hublocs - e.g. those that haven't been marked deleted */
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$ret = q("select * from hubloc where hubloc_hash = '%s' and hubloc_deleted = 0 order by hubloc_url ",
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dbesc($hash)
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);
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return $ret;
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}
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/**
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* @brief Builds a zot6 notification packet.
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*
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* Builds a zot6 notification packet that you can either store in the queue with
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* a message array or call zot_zot to immediately zot it to the other side.
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*
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* @param array $channel
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* sender channel structure
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* @param string $type
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* packet type: one of 'ping', 'pickup', 'purge', 'refresh', 'keychange', 'force_refresh', 'notify', 'auth_check'
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* @param array $recipients
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* envelope recipients, array of portable_id's; empty for public posts
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* @param string msg
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* optional message
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* @param string $remote_key
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* optional public site key of target hub used to encrypt entire packet
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* NOTE: remote_key and encrypted packets are required for 'auth_check' packets, optional for all others
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* @param string $methods
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* optional comma separated list of encryption methods @ref self::best_algorithm()
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* @returns string json encoded zot packet
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*/
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static function build_packet($channel, $type = 'activity', $recipients = null, $msg = '', $encoding = 'activitystreams', $remote_key = null, $methods = '') {
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$sig_method = get_config('system','signature_algorithm','sha256');
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$data = [
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'type' => $type,
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'encoding' => $encoding,
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'sender' => $channel['channel_hash'],
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'site_id' => self::make_xchan_hash(z_root(), get_config('system','pubkey')),
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'version' => System::get_zot_revision(),
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];
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if ($recipients) {
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$data['recipients'] = $recipients;
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}
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if ($msg) {
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$actor = channel_url($channel);
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if ($encoding === 'activitystreams' && array_key_exists('actor',$msg) && is_string($msg['actor']) && $actor === $msg['actor']) {
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$msg = JSalmon::sign($msg,$actor,$channel['channel_prvkey']);
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}
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$data['data'] = $msg;
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}
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else {
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unset($data['encoding']);
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}
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logger('packet: ' . print_r($data,true), LOGGER_DATA, LOG_DEBUG);
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if ($remote_key) {
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$algorithm = self::best_algorithm($methods);
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if ($algorithm) {
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$data = Crypto::encapsulate(json_encode($data),$remote_key, $algorithm);
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}
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}
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return json_encode($data);
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}
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/**
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* @brief Choose best encryption function from those available on both sites.
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*
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* @param string $methods
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* comma separated list of encryption methods
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* @return string first match from our site method preferences crypto_methods() array
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* of a method which is common to both sites; or 'aes256cbc' if no matches are found.
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*/
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static function best_algorithm($methods) {
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$x = [
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'methods' => $methods,
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'result' => ''
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];
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/**
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* @hooks zot_best_algorithm
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* Called when negotiating crypto algorithms with remote sites.
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* * \e string \b methods - comma separated list of encryption methods
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* * \e string \b result - the algorithm to return
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*/
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call_hooks('zot_best_algorithm', $x);
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if ($x['result']) {
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return $x['result'];
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}
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if ($methods) {
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$x = explode(',', $methods);
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if ($x) {
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$y = Crypto::methods();
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if ($y) {
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foreach ($y as $yv) {
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$yv = trim($yv);
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if (in_array($yv, $x)) {
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return($yv);
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}
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}
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}
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}
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}
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return '';
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}
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/**
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* @brief send a zot message
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*
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* @see z_post_url()
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*
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* @param string $url
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* @param array $data
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* @param array $channel (required if using zot6 delivery)
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* @param array $crypto (required if encrypted httpsig, requires hubloc_sitekey and site_crypto elements)
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* @return array see z_post_url() for returned data format
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*/
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static function zot($url, $data, $channel = null,$crypto = null) {
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if ($channel) {
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$headers = [
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'X-Zot-Token' => random_string(),
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'Digest' => HTTPSig::generate_digest_header($data),
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'Content-type' => 'application/x-zot+json',
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'(request-target)' => 'post ' . get_request_string($url)
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];
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$h = HTTPSig::create_sig($headers,$channel['channel_prvkey'],channel_url($channel),false,'sha512',
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(($crypto) ? [ 'key' => $crypto['hubloc_sitekey'], 'algorithm' => self::best_algorithm($crypto['site_crypto']) ] : false));
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}
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else {
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$h = [];
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}
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$redirects = 0;
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return z_post_url($url,$data,$redirects,((empty($h)) ? [] : [ 'headers' => $h ]));
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}
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/**
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* @brief Refreshes after permission changed or friending, etc.
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*
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*
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* refresh is typically invoked when somebody has changed permissions of a channel and they are notified
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* to fetch new permissions via a finger/discovery operation. This may result in a new connection
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* (abook entry) being added to a local channel and it may result in auto-permissions being granted.
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*
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* Friending in zot is accomplished by sending a refresh packet to a specific channel which indicates a
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* permission change has been made by the sender which affects the target channel. The hub controlling
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* the target channel does targetted discovery (a zot-finger request requesting permissions for the local
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* channel). These are decoded here, and if necessary and abook structure (addressbook) is created to store
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* the permissions assigned to this channel.
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*
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* Initially these abook structures are created with a 'pending' flag, so that no reverse permissions are
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* implied until this is approved by the owner channel. A channel can also auto-populate permissions in
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* return and send back a refresh packet of its own. This is used by forum and group communication channels
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* so that friending and membership in the channel's "club" is automatic.
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*
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* @param array $them => xchan structure of sender
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* @param array $channel => local channel structure of target recipient, required for "friending" operations
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* @param array $force (optional) default false
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*
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* @return boolean
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* * \b true if successful
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* * otherwise \b false
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*/
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static function refresh($them, $channel = null, $force = false) {
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logger('them: ' . print_r($them,true), LOGGER_DATA, LOG_DEBUG);
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if ($channel) {
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logger('channel: ' . print_r($channel,true), LOGGER_DATA, LOG_DEBUG);
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}
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$url = null;
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if ($them['hubloc_id_url']) {
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$url = $them['hubloc_id_url'];
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}
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else {
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$r = null;
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// if they re-installed the server we could end up with the wrong record - pointing to the old install.
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// We'll order by reverse id to try and pick off the newest one first and hopefully end up with the
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// correct hubloc. If this doesn't work we may have to re-write this section to try them all.
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if(array_key_exists('xchan_addr',$them) && $them['xchan_addr']) {
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$r = q("select hubloc_id_url, hubloc_primary from hubloc where hubloc_addr = '%s' and hubloc_network = 'zot6' order by hubloc_id desc",
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dbesc($them['xchan_addr'])
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);
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}
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if (! $r) {
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$r = q("select hubloc_id_url, hubloc_primary from hubloc where hubloc_hash = '%s' and hubloc_network = 'zot6' order by hubloc_id desc",
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dbesc($them['xchan_hash'])
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);
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}
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if ($r) {
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foreach ($r as $rr) {
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if (intval($rr['hubloc_primary'])) {
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$url = $rr['hubloc_id_url'];
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$record = $rr;
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}
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}
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if (! $url) {
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$url = $r[0]['hubloc_id_url'];
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}
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}
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}
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if (! $url) {
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logger('zot_refresh: no url');
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return false;
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}
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$s = q("select site_dead from site where site_url = '%s' limit 1",
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dbesc($url)
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);
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if ($s && intval($s[0]['site_dead']) && (! $force)) {
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logger('zot_refresh: site ' . $url . ' is marked dead and force flag is not set. Cancelling operation.');
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return false;
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}
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$record = Zotfinger::exec($url,$channel);
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// Check the HTTP signature
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$hsig = $record['signature'];
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if ($hsig && $hsig['signer'] === $url && $hsig['header_valid'] === true && $hsig['content_valid'] === true) {
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$hsig_valid = true;
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}
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if (! $hsig_valid) {
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logger('http signature not valid: ' . print_r($hsig,true));
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return false;
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}
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logger('zot-info: ' . print_r($record,true), LOGGER_DATA, LOG_DEBUG);
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$x = self::import_xchan($record['data'], (($force) ? UPDATE_FLAGS_FORCED : UPDATE_FLAGS_UPDATED));
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if (! $x['success']) {
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return false;
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}
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if ($channel && $record['data']['permissions']) {
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$old_read_stream_perm = their_perms_contains($channel['channel_id'],$x['hash'],'view_stream');
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set_abconfig($channel['channel_id'],$x['hash'],'system','their_perms',$record['data']['permissions']);
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if (array_key_exists('profile',$record['data']) && array_key_exists('next_birthday',$record['data']['profile'])) {
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$next_birthday = datetime_convert('UTC','UTC',$record['data']['profile']['next_birthday']);
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}
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else {
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$next_birthday = NULL_DATE;
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}
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$profile_assign = get_pconfig($channel['channel_id'],'system','profile_assign','');
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// Keep original perms to check if we need to notify them
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$previous_perms = get_all_perms($channel['channel_id'],$x['hash']);
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$r = q("select * from abook where abook_xchan = '%s' and abook_channel = %d and abook_self = 0 limit 1",
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dbesc($x['hash']),
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intval($channel['channel_id'])
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);
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if ($r) {
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// connection exists
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// if the dob is the same as what we have stored (disregarding the year), keep the one
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// we have as we may have updated the year after sending a notification; and resetting
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// to the one we just received would cause us to create duplicated events.
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if (substr($r[0]['abook_dob'],5) == substr($next_birthday,5))
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$next_birthday = $r[0]['abook_dob'];
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$y = q("update abook set abook_dob = '%s'
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where abook_xchan = '%s' and abook_channel = %d
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and abook_self = 0 ",
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dbescdate($next_birthday),
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dbesc($x['hash']),
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intval($channel['channel_id'])
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);
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if (! $y) {
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logger('abook update failed');
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}
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else {
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// if we were just granted read stream permission and didn't have it before, try to pull in some posts
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if ((! $old_read_stream_perm) && (intval($permissions['view_stream'])))
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Master::Summon([ 'Onepoll', $r[0]['abook_id'] ]);
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}
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}
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else {
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// limit the ability to do connection spamming, this limit is per channel
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$lim = intval(get_config('system','max_connections_per_day',50));
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if ($lim) {
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$n = q("select count(abook_id) as total from abook where abook_channel = %d and abook_created > '%s'",
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intval($channel['channel_id']),
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dbesc(datetime_convert('UTC','UTC','now - 24 hours'))
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);
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if ($n && intval($n['total']) > $lim) {
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logger('channel: ' . $channel['channel_id'] . ' too many new connections per day. This one from ' . $hsig['signer'], LOGGER_NORMAL, LOG_WARNING);
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return false;
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}
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}
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$p = Permissions::connect_perms($channel['channel_id']);
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$my_perms = Permissions::serialise($p['perms']);
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$automatic = $p['automatic'];
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// new connection
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if ($my_perms) {
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set_abconfig($channel['channel_id'],$x['hash'],'system','my_perms',$my_perms);
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}
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$closeness = get_pconfig($channel['channel_id'],'system','new_abook_closeness',80);
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// check if it is a sub-channel (collection) and auto-friend if it is
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$is_collection = false;
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$cl = q("select channel_id from channel where channel_hash = '%s' and channel_parent = '%s' and channel_account_id = %d limit 1",
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dbesc($x['hash']),
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dbesc($channel['channel_hash']),
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intval($channel['channel_account_id'])
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);
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if ($cl) {
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$is_collection = true;
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$automatic = true;
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$closeness = 10;
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}
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$y = abook_store_lowlevel(
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[
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'abook_account' => intval($channel['channel_account_id']),
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'abook_channel' => intval($channel['channel_id']),
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'abook_closeness' => intval($closeness),
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'abook_xchan' => $x['hash'],
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'abook_profile' => $profile_assign,
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'abook_created' => datetime_convert(),
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'abook_updated' => datetime_convert(),
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'abook_dob' => $next_birthday,
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'abook_pending' => intval(($automatic) ? 0 : 1)
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]
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);
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if ($y) {
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logger("New introduction received for {$channel['channel_name']}");
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$new_perms = get_all_perms($channel['channel_id'],$x['hash']);
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// Send a clone sync packet and a permissions update if permissions have changed
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$new_connection = q("select * from abook left join xchan on abook_xchan = xchan_hash where abook_xchan = '%s' and abook_channel = %d and abook_self = 0 order by abook_created desc limit 1",
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dbesc($x['hash']),
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intval($channel['channel_id'])
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);
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if ($new_connection) {
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if (! Permissions::PermsCompare($new_perms,$previous_perms)) {
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Master::Summon([ 'Notifier', 'permissions_create', $new_connection[0]['abook_id'] ]);
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}
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if (! $is_collection) {
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Enotify::submit(
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[
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'type' => NOTIFY_INTRO,
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'from_xchan' => $x['hash'],
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'to_xchan' => $channel['channel_hash'],
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'link' => z_root() . '/connedit/' . $new_connection[0]['abook_id']
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]
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);
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}
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if (intval($permissions['view_stream'])) {
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if (intval(get_pconfig($channel['channel_id'],'perm_limits','send_stream') & PERMS_PENDING)
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|| (! intval($new_connection[0]['abook_pending'])))
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Master::Summon([ 'Onepoll', $new_connection[0]['abook_id'] ]);
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}
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// If there is a default group for this channel, add this connection to it
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// for pending connections this will happens at acceptance time.
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if (! intval($new_connection[0]['abook_pending'])) {
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$default_group = $channel['channel_default_group'];
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if ($default_group) {
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$g = AccessList::rec_byhash($channel['channel_id'],$default_group);
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if ($g) {
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AccessList::member_add($channel['channel_id'],'',$x['hash'],$g['id']);
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}
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}
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}
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unset($new_connection[0]['abook_id']);
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unset($new_connection[0]['abook_account']);
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unset($new_connection[0]['abook_channel']);
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$abconfig = load_abconfig($channel['channel_id'],$new_connection['abook_xchan']);
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if ($abconfig) {
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$new_connection['abconfig'] = $abconfig;
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}
|
|
Libsync::build_sync_packet($channel['channel_id'], array('abook' => $new_connection));
|
|
}
|
|
}
|
|
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @brief Look up if channel is known and previously verified.
|
|
*
|
|
* A guid and a url, both signed by the sender, distinguish a known sender at a
|
|
* known location.
|
|
* This function looks these up to see if the channel is known and therefore
|
|
* previously verified. If not, we will need to verify it.
|
|
*
|
|
* @param array $arr an associative array which must contain:
|
|
* * \e string \b id => id of conversant
|
|
* * \e string \b id_sig => id signed with conversant's private key
|
|
* * \e string \b location => URL of the origination hub of this communication
|
|
* * \e string \b location_sig => URL signed with conversant's private key
|
|
* @param boolean $multiple (optional) default false
|
|
*
|
|
* @return array|null
|
|
* * null if site is blacklisted or not found
|
|
* * otherwise an array with an hubloc record
|
|
*/
|
|
|
|
static function gethub($arr, $multiple = false) {
|
|
|
|
if ($arr['id'] && $arr['id_sig'] && $arr['location'] && $arr['location_sig']) {
|
|
|
|
if (! check_siteallowed($arr['location'])) {
|
|
logger('blacklisted site: ' . $arr['location']);
|
|
return null;
|
|
}
|
|
|
|
$limit = (($multiple) ? '' : ' limit 1 ');
|
|
|
|
$r = q("select hubloc.*, site.site_crypto from hubloc left join site on hubloc_url = site_url
|
|
where hubloc_guid = '%s' and hubloc_guid_sig = '%s'
|
|
and hubloc_url = '%s' and hubloc_url_sig = '%s'
|
|
and hubloc_site_id = '%s' and hubloc_network = 'zot6'
|
|
$limit",
|
|
dbesc($arr['id']),
|
|
dbesc($arr['id_sig']),
|
|
dbesc($arr['location']),
|
|
dbesc($arr['location_sig']),
|
|
dbesc($arr['site_id'])
|
|
);
|
|
if ($r) {
|
|
logger('Found', LOGGER_DEBUG);
|
|
return (($multiple) ? $r : $r[0]);
|
|
}
|
|
}
|
|
logger('Not found: ' . print_r($arr,true), LOGGER_DEBUG);
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
|
|
|
|
static function valid_hub($sender,$site_id) {
|
|
|
|
$r = q("select hubloc.*, site.site_crypto from hubloc left join site on hubloc_url = site_url where hubloc_hash = '%s' and hubloc_site_id = '%s' limit 1",
|
|
dbesc($sender),
|
|
dbesc($site_id)
|
|
);
|
|
if (! $r) {
|
|
return null;
|
|
}
|
|
|
|
if (! check_siteallowed($r[0]['hubloc_url'])) {
|
|
logger('blacklisted site: ' . $r[0]['hubloc_url']);
|
|
return null;
|
|
}
|
|
|
|
if (! check_channelallowed($r[0]['hubloc_hash'])) {
|
|
logger('blacklisted channel: ' . $r[0]['hubloc_hash']);
|
|
return null;
|
|
}
|
|
|
|
return $r[0];
|
|
}
|
|
|
|
/**
|
|
* @brief Registers an unknown hub.
|
|
*
|
|
* A communication has been received which has an unknown (to us) sender.
|
|
* Perform discovery based on our calculated hash of the sender at the
|
|
* origination address. This will fetch the discovery packet of the sender,
|
|
* which contains the public key we need to verify our guid and url signatures.
|
|
*
|
|
* @param array $arr an associative array which must contain:
|
|
* * \e string \b guid => guid of conversant
|
|
* * \e string \b guid_sig => guid signed with conversant's private key
|
|
* * \e string \b url => URL of the origination hub of this communication
|
|
* * \e string \b url_sig => URL signed with conversant's private key
|
|
*
|
|
* @return array An associative array with
|
|
* * \b success boolean true or false
|
|
* * \b message (optional) error string only if success is false
|
|
*/
|
|
|
|
static function register_hub($id) {
|
|
|
|
$id_hash = false;
|
|
$valid = false;
|
|
$hsig_valid = false;
|
|
|
|
$result = [ 'success' => false ];
|
|
|
|
if (! $id) {
|
|
return $result;
|
|
}
|
|
|
|
$record = Zotfinger::exec($id);
|
|
|
|
// Check the HTTP signature
|
|
|
|
$hsig = $record['signature'];
|
|
if ($hsig['signer'] === $id && $hsig['header_valid'] === true && $hsig['content_valid'] === true) {
|
|
$hsig_valid = true;
|
|
}
|
|
if (! $hsig_valid) {
|
|
logger('http signature not valid: ' . print_r($hsig,true));
|
|
return $result;
|
|
}
|
|
|
|
$c = self::import_xchan($record['data']);
|
|
if ($c['success']) {
|
|
$result['success'] = true;
|
|
}
|
|
else {
|
|
logger('Failure to verify zot packet');
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* @brief Takes an associative array of a fetch discovery packet and updates
|
|
* all internal data structures which need to be updated as a result.
|
|
*
|
|
* @param array $arr => json_decoded discovery packet
|
|
* @param int $ud_flags
|
|
* Determines whether to create a directory update record if any changes occur, default is UPDATE_FLAGS_UPDATED
|
|
* $ud_flags = UPDATE_FLAGS_FORCED indicates a forced refresh where we unconditionally create a directory update record
|
|
* this typically occurs once a month for each channel as part of a scheduled ping to notify the directory
|
|
* that the channel still exists
|
|
* @param array $ud_arr
|
|
* If set [typically by update_directory_entry()] indicates a specific update table row and more particularly
|
|
* contains a particular address (ud_addr) which needs to be updated in that table.
|
|
*
|
|
* @return array An associative array with:
|
|
* * \e boolean \b success boolean true or false
|
|
* * \e string \b message (optional) error string only if success is false
|
|
*/
|
|
|
|
static function import_xchan($arr, $ud_flags = UPDATE_FLAGS_UPDATED, $ud_arr = null) {
|
|
|
|
/**
|
|
* @hooks import_xchan
|
|
* Called when processing the result of zot_finger() to store the result
|
|
* * \e array
|
|
*/
|
|
call_hooks('import_xchan', $arr);
|
|
|
|
$ret = array('success' => false);
|
|
$dirmode = intval(get_config('system','directory_mode'));
|
|
|
|
$changed = false;
|
|
$what = '';
|
|
|
|
if (! is_array($arr)) {
|
|
logger('Not an array: ' . print_r($arr,true), LOGGER_DEBUG);
|
|
return $ret;
|
|
}
|
|
|
|
if (! ($arr['id'] && $arr['id_sig'])) {
|
|
logger('No identity information provided. ' . print_r($arr,true));
|
|
return $ret;
|
|
}
|
|
|
|
$xchan_hash = self::make_xchan_hash($arr['id'],$arr['public_key']);
|
|
$arr['hash'] = $xchan_hash;
|
|
|
|
$import_photos = false;
|
|
|
|
$sig_methods = ((array_key_exists('signing',$arr) && is_array($arr['signing'])) ? $arr['signing'] : [ 'sha256' ]);
|
|
$verified = false;
|
|
|
|
if (! self::verify($arr['id'],$arr['id_sig'],$arr['public_key'])) {
|
|
logger('Unable to verify channel signature for ' . $arr['address']);
|
|
return $ret;
|
|
}
|
|
else {
|
|
$verified = true;
|
|
}
|
|
|
|
if (! $verified) {
|
|
$ret['message'] = t('Unable to verify channel signature');
|
|
return $ret;
|
|
}
|
|
|
|
logger('import_xchan: ' . $xchan_hash, LOGGER_DEBUG);
|
|
|
|
$r = q("select * from xchan where xchan_hash = '%s' limit 1",
|
|
dbesc($xchan_hash)
|
|
);
|
|
|
|
if (! array_key_exists('connect_url', $arr)) {
|
|
$arr['connect_url'] = '';
|
|
}
|
|
|
|
if ($r) {
|
|
if ($arr['photo'] && array_key_exists('updated',$arr['photo']) && $r[0]['xchan_photo_date'] != $arr['photo']['updated']) {
|
|
$import_photos = true;
|
|
}
|
|
|
|
// if we import an entry from a site that's not ours and either or both of us is off the grid - hide the entry.
|
|
/** @TODO: check if we're the same directory realm, which would mean we are allowed to see it */
|
|
|
|
$dirmode = get_config('system','directory_mode');
|
|
|
|
if ((($arr['site']['directory_mode'] === 'standalone') || ($dirmode & DIRECTORY_MODE_STANDALONE)) && ($arr['site']['url'] != z_root())) {
|
|
$arr['searchable'] = false;
|
|
}
|
|
|
|
$hidden = (1 - intval($arr['searchable']));
|
|
|
|
$hidden_changed = $adult_changed = $deleted_changed = $type_changed = 0;
|
|
|
|
if (intval($r[0]['xchan_hidden']) != (1 - intval($arr['searchable']))) {
|
|
$hidden_changed = 1;
|
|
}
|
|
if (intval($r[0]['xchan_selfcensored']) != intval($arr['adult_content'])) {
|
|
$adult_changed = 1;
|
|
}
|
|
if (intval($r[0]['xchan_deleted']) != intval($arr['deleted'])) {
|
|
$deleted_changed = 1;
|
|
}
|
|
|
|
if ($arr['channel_type'] === 'collection') {
|
|
$px = 2;
|
|
}
|
|
elseif ($arr['channel_type'] === 'group') {
|
|
$px = 1;
|
|
}
|
|
else {
|
|
$px = 0;
|
|
}
|
|
if (array_key_exists('public_forum',$arr) && intval($arr['public_forum'])) {
|
|
$px = 1;
|
|
}
|
|
|
|
if (intval($r[0]['xchan_type']) !== $px) {
|
|
$type_changed = true;
|
|
}
|
|
|
|
if ($arr['protocols']) {
|
|
$protocols = implode(',',$arr['protocols']);
|
|
if ($protocols !== 'zot6') {
|
|
set_xconfig($xchan_hash,'system','protocols',$protocols);
|
|
}
|
|
else {
|
|
del_xconfig($xchan_hash,'system','protocols');
|
|
}
|
|
}
|
|
|
|
if (($r[0]['xchan_name_date'] != $arr['name_updated'])
|
|
|| ($r[0]['xchan_connurl'] != $arr['primary_location']['connections_url'])
|
|
|| ($r[0]['xchan_addr'] != $arr['primary_location']['address'])
|
|
|| ($r[0]['xchan_follow'] != $arr['primary_location']['follow_url'])
|
|
|| ($r[0]['xchan_connpage'] != $arr['connect_url'])
|
|
|| ($r[0]['xchan_url'] != $arr['primary_location']['url'])
|
|
|| $hidden_changed || $adult_changed || $deleted_changed || $type_changed ) {
|
|
$rup = q("update xchan set xchan_name = '%s', xchan_name_date = '%s', xchan_connurl = '%s', xchan_follow = '%s',
|
|
xchan_connpage = '%s', xchan_hidden = %d, xchan_selfcensored = %d, xchan_deleted = %d, xchan_type = %d,
|
|
xchan_addr = '%s', xchan_url = '%s' where xchan_hash = '%s'",
|
|
dbesc(($arr['name']) ? escape_tags($arr['name']) : '-'),
|
|
dbesc($arr['name_updated']),
|
|
dbesc($arr['primary_location']['connections_url']),
|
|
dbesc($arr['primary_location']['follow_url']),
|
|
dbesc($arr['primary_location']['connect_url']),
|
|
intval(1 - intval($arr['searchable'])),
|
|
intval($arr['adult_content']),
|
|
intval($arr['deleted']),
|
|
intval($px),
|
|
dbesc(escape_tags($arr['primary_location']['address'])),
|
|
dbesc(escape_tags($arr['primary_location']['url'])),
|
|
dbesc($xchan_hash)
|
|
);
|
|
|
|
logger('Update: existing: ' . print_r($r[0],true), LOGGER_DATA, LOG_DEBUG);
|
|
logger('Update: new: ' . print_r($arr,true), LOGGER_DATA, LOG_DEBUG);
|
|
$what .= 'xchan ';
|
|
$changed = true;
|
|
}
|
|
}
|
|
else {
|
|
$import_photos = true;
|
|
|
|
if ((($arr['site']['directory_mode'] === 'standalone')
|
|
|| ($dirmode & DIRECTORY_MODE_STANDALONE))
|
|
&& ($arr['site']['url'] != z_root())) {
|
|
$arr['searchable'] = false;
|
|
}
|
|
|
|
|
|
if ($arr['channel_type'] === 'collection') {
|
|
$px = 2;
|
|
}
|
|
elseif ($arr['channel_type'] === 'group') {
|
|
$px = 1;
|
|
}
|
|
else {
|
|
$px = 0;
|
|
}
|
|
|
|
if (array_key_exists('public_forum',$arr) && intval($arr['public_forum'])) {
|
|
$px = 1;
|
|
}
|
|
|
|
$x = xchan_store_lowlevel(
|
|
[
|
|
'xchan_hash' => $xchan_hash,
|
|
'xchan_guid' => $arr['id'],
|
|
'xchan_guid_sig' => $arr['id_sig'],
|
|
'xchan_pubkey' => $arr['public_key'],
|
|
'xchan_photo_mimetype' => $arr['photo_mimetype'],
|
|
'xchan_photo_l' => $arr['photo'],
|
|
'xchan_addr' => escape_tags($arr['primary_location']['address']),
|
|
'xchan_url' => escape_tags($arr['primary_location']['url']),
|
|
'xchan_connurl' => $arr['primary_location']['connections_url'],
|
|
'xchan_follow' => $arr['primary_location']['follow_url'],
|
|
'xchan_connpage' => $arr['connect_url'],
|
|
'xchan_name' => (($arr['name']) ? escape_tags($arr['name']) : '-'),
|
|
'xchan_network' => 'zot6',
|
|
'xchan_photo_date' => $arr['photo_updated'],
|
|
'xchan_name_date' => $arr['name_updated'],
|
|
'xchan_hidden' => intval(1 - intval($arr['searchable'])),
|
|
'xchan_selfcensored' => $arr['adult_content'],
|
|
'xchan_deleted' => $arr['deleted'],
|
|
'xchan_type' => $px
|
|
]
|
|
);
|
|
|
|
$what .= 'new_xchan';
|
|
$changed = true;
|
|
}
|
|
|
|
if ($import_photos) {
|
|
|
|
require_once('include/photo_factory.php');
|
|
|
|
// see if this is a channel clone that's hosted locally - which we treat different from other xchans/connections
|
|
|
|
$local = q("select channel_account_id, channel_id from channel where channel_hash = '%s' limit 1",
|
|
dbesc($xchan_hash)
|
|
);
|
|
if ($local) {
|
|
$ph = z_fetch_url($arr['photo']['url'], true);
|
|
if ($ph['success']) {
|
|
$hash = import_channel_photo($ph['body'], $arr['photo']['type'], $local[0]['channel_account_id'], $local[0]['channel_id']);
|
|
|
|
if ($hash) {
|
|
// unless proven otherwise
|
|
$is_default_profile = 1;
|
|
|
|
$profile = q("select is_default from profile where aid = %d and uid = %d limit 1",
|
|
intval($local[0]['channel_account_id']),
|
|
intval($local[0]['channel_id'])
|
|
);
|
|
if ($profile) {
|
|
if (! intval($profile[0]['is_default'])) {
|
|
$is_default_profile = 0;
|
|
}
|
|
}
|
|
|
|
// If setting for the default profile, unset the profile photo flag from any other photos I own
|
|
if ($is_default_profile) {
|
|
q("UPDATE photo SET photo_usage = %d WHERE photo_usage = %d AND resource_id != '%s' AND aid = %d AND uid = %d",
|
|
intval(PHOTO_NORMAL),
|
|
intval(PHOTO_PROFILE),
|
|
dbesc($hash),
|
|
intval($local[0]['channel_account_id']),
|
|
intval($local[0]['channel_id'])
|
|
);
|
|
}
|
|
}
|
|
|
|
// reset the names in case they got messed up when we had a bug in this function
|
|
$photos = array(
|
|
z_root() . '/photo/profile/l/' . $local[0]['channel_id'],
|
|
z_root() . '/photo/profile/m/' . $local[0]['channel_id'],
|
|
z_root() . '/photo/profile/s/' . $local[0]['channel_id'],
|
|
$arr['photo_mimetype'],
|
|
false
|
|
);
|
|
}
|
|
}
|
|
else {
|
|
$photos = import_xchan_photo($arr['photo']['url'], $xchan_hash);
|
|
}
|
|
if ($photos) {
|
|
if ($photos[4]) {
|
|
// importing the photo failed somehow. Leave the photo_date alone so we can try again at a later date.
|
|
// This often happens when somebody joins the matrix with a bad cert.
|
|
$r = q("update xchan set xchan_photo_l = '%s', xchan_photo_m = '%s', xchan_photo_s = '%s', xchan_photo_mimetype = '%s'
|
|
where xchan_hash = '%s'",
|
|
dbesc($photos[0]),
|
|
dbesc($photos[1]),
|
|
dbesc($photos[2]),
|
|
dbesc($photos[3]),
|
|
dbesc($xchan_hash)
|
|
);
|
|
}
|
|
else {
|
|
$r = q("update xchan set xchan_photo_date = '%s', xchan_photo_l = '%s', xchan_photo_m = '%s', xchan_photo_s = '%s', xchan_photo_mimetype = '%s'
|
|
where xchan_hash = '%s'",
|
|
dbescdate(datetime_convert('UTC','UTC',$arr['photo_updated'])),
|
|
dbesc($photos[0]),
|
|
dbesc($photos[1]),
|
|
dbesc($photos[2]),
|
|
dbesc($photos[3]),
|
|
dbesc($xchan_hash)
|
|
);
|
|
}
|
|
$what .= 'photo ';
|
|
$changed = true;
|
|
}
|
|
}
|
|
|
|
// what we are missing for true hub independence is for any changes in the primary hub to
|
|
// get reflected not only in the hublocs, but also to update the URLs and addr in the appropriate xchan
|
|
|
|
$s = Libsync::sync_locations($arr, $arr);
|
|
|
|
if ($s) {
|
|
if ($s['change_message']) {
|
|
$what .= $s['change_message'];
|
|
}
|
|
if ($s['changed']) {
|
|
$changed = $s['changed'];
|
|
}
|
|
if ($s['message']) {
|
|
$ret['message'] .= $s['message'];
|
|
}
|
|
}
|
|
|
|
// Which entries in the update table are we interested in updating?
|
|
|
|
$address = (($ud_arr && $ud_arr['ud_addr']) ? $ud_arr['ud_addr'] : $arr['address']);
|
|
|
|
|
|
// Are we a directory server of some kind?
|
|
|
|
$other_realm = false;
|
|
$realm = get_directory_realm();
|
|
if (array_key_exists('site',$arr)
|
|
&& array_key_exists('realm',$arr['site'])
|
|
&& (strpos($arr['site']['realm'],$realm) === false))
|
|
$other_realm = true;
|
|
|
|
|
|
if ($dirmode != DIRECTORY_MODE_NORMAL) {
|
|
|
|
// We're some kind of directory server. However we can only add directory information
|
|
// if the entry is in the same realm (or is a sub-realm). Sub-realms are denoted by
|
|
// including the parent realm in the name. e.g. 'RED_GLOBAL:foo' would allow an entry to
|
|
// be in directories for the local realm (foo) and also the RED_GLOBAL realm.
|
|
|
|
if (array_key_exists('profile',$arr) && is_array($arr['profile']) && (! $other_realm)) {
|
|
$profile_changed = Libzotdir::import_directory_profile($xchan_hash,$arr['profile'],$address,$ud_flags, 1);
|
|
if ($profile_changed) {
|
|
$what .= 'profile ';
|
|
$changed = true;
|
|
}
|
|
}
|
|
else {
|
|
logger('Profile not available - hiding');
|
|
// they may have made it private
|
|
$r = q("delete from xprof where xprof_hash = '%s'",
|
|
dbesc($xchan_hash)
|
|
);
|
|
$r = q("delete from xtag where xtag_hash = '%s' and xtag_flags = 0",
|
|
dbesc($xchan_hash)
|
|
);
|
|
}
|
|
}
|
|
|
|
if (array_key_exists('site',$arr) && is_array($arr['site'])) {
|
|
$profile_changed = self::import_site($arr['site']);
|
|
if ($profile_changed) {
|
|
$what .= 'site ';
|
|
$changed = true;
|
|
}
|
|
}
|
|
|
|
if (($changed) || ($ud_flags == UPDATE_FLAGS_FORCED)) {
|
|
$guid = random_string() . '@' . App::get_hostname();
|
|
Libzotdir::update_modtime($xchan_hash,$guid,$address,$ud_flags);
|
|
logger('Changed: ' . $what,LOGGER_DEBUG);
|
|
}
|
|
elseif (! $ud_flags) {
|
|
// nothing changed but we still need to update the updates record
|
|
q("update updates set ud_flags = ( ud_flags | %d ) where ud_addr = '%s' and not (ud_flags & %d) > 0 ",
|
|
intval(UPDATE_FLAGS_UPDATED),
|
|
dbesc($address),
|
|
intval(UPDATE_FLAGS_UPDATED)
|
|
);
|
|
}
|
|
|
|
if (! x($ret,'message')) {
|
|
$ret['success'] = true;
|
|
$ret['hash'] = $xchan_hash;
|
|
}
|
|
|
|
logger('Result: ' . print_r($ret,true), LOGGER_DATA, LOG_DEBUG);
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* @brief Called immediately after sending a zot message which is using queue processing.
|
|
*
|
|
* Updates the queue item according to the response result and logs any information
|
|
* returned to aid communications troubleshooting.
|
|
*
|
|
* @param string $hub - url of site we just contacted
|
|
* @param array $arr - output of z_post_url()
|
|
* @param array $outq - The queue structure attached to this request
|
|
*/
|
|
|
|
static function process_response($hub, $arr, $outq) {
|
|
|
|
logger('remote: ' . print_r($arr,true),LOGGER_DATA);
|
|
|
|
if (! $arr['success']) {
|
|
logger('Failed: ' . $hub);
|
|
return;
|
|
}
|
|
|
|
$x = json_decode($arr['body'], true);
|
|
|
|
if (! $x) {
|
|
logger('No json from ' . $hub);
|
|
logger('Headers: ' . print_r($arr['header'], true), LOGGER_DATA, LOG_DEBUG);
|
|
}
|
|
|
|
$x = Crypto::unencapsulate($x, get_config('system','prvkey'));
|
|
if (! is_array($x)) {
|
|
$x = json_decode($x,true);
|
|
}
|
|
|
|
if (! is_array($x)) {
|
|
btlogger('failed communication - no useful response: ' . $x);
|
|
}
|
|
|
|
if ($x) {
|
|
if (! $x['success']) {
|
|
|
|
// handle remote validation issues
|
|
|
|
$b = q("update dreport set dreport_result = '%s', dreport_time = '%s' where dreport_queue = '%s'",
|
|
dbesc(($x['message']) ? $x['message'] : 'unknown delivery error'),
|
|
dbesc(datetime_convert()),
|
|
dbesc($outq['outq_hash'])
|
|
);
|
|
}
|
|
|
|
if (is_array($x) && array_key_exists('delivery_report',$x) && is_array($x['delivery_report'])) {
|
|
foreach ($x['delivery_report'] as $xx) {
|
|
call_hooks('dreport_process',$xx);
|
|
if (is_array($xx) && array_key_exists('message_id',$xx) && DReport::is_storable($xx)) {
|
|
q("insert into dreport ( dreport_mid, dreport_site, dreport_recip, dreport_name, dreport_result, dreport_time, dreport_xchan ) values ( '%s', '%s', '%s','%s','%s','%s','%s' ) ",
|
|
dbesc($xx['message_id']),
|
|
dbesc($xx['location']),
|
|
dbesc($xx['recipient']),
|
|
dbesc($xx['name']),
|
|
dbesc($xx['status']),
|
|
dbesc(datetime_convert('UTC','UTC',$xx['date'])),
|
|
dbesc($xx['sender'])
|
|
);
|
|
}
|
|
}
|
|
|
|
// we have a more descriptive delivery report, so discard the per hub 'queue' report.
|
|
|
|
q("delete from dreport where dreport_queue = '%s' ",
|
|
dbesc($outq['outq_hash'])
|
|
);
|
|
}
|
|
}
|
|
// update the timestamp for this site
|
|
|
|
q("update site set site_dead = 0, site_update = '%s' where site_url = '%s'",
|
|
dbesc(datetime_convert()),
|
|
dbesc(dirname($hub))
|
|
);
|
|
|
|
// synchronous message types are handled immediately
|
|
// async messages remain in the queue until processed.
|
|
|
|
if (intval($outq['outq_async'])) {
|
|
Queue::remove($outq['outq_hash'],$outq['outq_channel']);
|
|
}
|
|
|
|
logger('zot_process_response: ' . print_r($x,true), LOGGER_DEBUG);
|
|
}
|
|
|
|
/**
|
|
* @brief
|
|
*
|
|
* We received a notification packet (in mod_post) that a message is waiting for us, and we've verified the sender.
|
|
* Check if the site is using zot6 delivery and includes a verified HTTP Signature, signed content, and a 'msg' field,
|
|
* and also that the signer and the sender match.
|
|
* If that happens, we do not need to fetch/pickup the message - we have it already and it is verified.
|
|
* Translate it into the form we need for zot_import() and import it.
|
|
*
|
|
* Otherwise send back a pickup message, using our message tracking ID ($arr['secret']), which we will sign with our site
|
|
* private key.
|
|
* The entire pickup message is encrypted with the remote site's public key.
|
|
* If everything checks out on the remote end, we will receive back a packet containing one or more messages,
|
|
* which will be processed and delivered before this function ultimately returns.
|
|
*
|
|
* @see zot_import()
|
|
*
|
|
* @param array $arr
|
|
* decrypted and json decoded notify packet from remote site
|
|
* @return array from zot_import()
|
|
*/
|
|
|
|
static function fetch($arr,$hub = null) {
|
|
|
|
logger('zot_fetch: ' . print_r($arr,true), LOGGER_DATA, LOG_DEBUG);
|
|
|
|
return self::import($arr,$hub);
|
|
|
|
}
|
|
|
|
/**
|
|
* @brief Process incoming messages.
|
|
*
|
|
* Process incoming messages and import, update, delete as directed
|
|
*
|
|
* The message types handled here are 'activity' (e.g. posts), and 'sync'.
|
|
*
|
|
* @param array $arr
|
|
* 'pickup' structure returned from remote site
|
|
* @param string $sender_url
|
|
* the url specified by the sender in the initial communication.
|
|
* We will verify the sender and url in each returned message structure and
|
|
* also verify that all the messages returned match the site url that we are
|
|
* currently processing.
|
|
*
|
|
* @returns array
|
|
* Suitable for logging remotely, enumerating the processing results of each message/recipient combination
|
|
* * [0] => \e string $channel_hash
|
|
* * [1] => \e string $delivery_status
|
|
* * [2] => \e string $address
|
|
*/
|
|
|
|
static function import($arr,$hub = null) {
|
|
|
|
$env = $arr;
|
|
$private = false;
|
|
$return = [];
|
|
|
|
$result = null;
|
|
|
|
logger('Notify: ' . print_r($env,true), LOGGER_DATA, LOG_DEBUG);
|
|
|
|
if (! is_array($env)) {
|
|
logger('decode error');
|
|
return;
|
|
}
|
|
|
|
$message_request = false;
|
|
|
|
|
|
$has_data = array_key_exists('data',$env) && $env['data'];
|
|
$data = (($has_data) ? $env['data'] : false);
|
|
|
|
$AS = null;
|
|
|
|
if ($env['encoding'] === 'activitystreams') {
|
|
|
|
$AS = new ActivityStreams($data);
|
|
if (! $AS->is_valid()) {
|
|
logger('Activity rejected: ' . print_r($data,true));
|
|
return;
|
|
}
|
|
|
|
if (is_array($AS->obj)) {
|
|
$arr = Activity::decode_note($AS);
|
|
}
|
|
else {
|
|
$arr = [];
|
|
}
|
|
|
|
logger($AS->debug(), LOGGER_DATA);
|
|
}
|
|
|
|
|
|
// There is nothing inherently wrong with getting a message-id which isn't a canonical URI/URL, but
|
|
// at the present time (2019/02) during the Hubzilla transition to zot6 it is likely to cause lots of duplicates for
|
|
// messages arriving from different protocols and sources with different message-id semantics. This
|
|
// restriction can be relaxed once most Hubzilla sites are upgraded to > 4.0.
|
|
// Don't check sync packets since they have a different encoding
|
|
|
|
if ($arr && $env['type'] !== 'sync') {
|
|
if (strpos($arr['mid'],'http') === false && strpos($arr['mid'],'x-zot') === false) {
|
|
logger('activity rejected: legacy message-id');
|
|
return;
|
|
}
|
|
|
|
if ($arr['verb'] === 'Create' && ActivityStreams::is_an_actor($arr['obj_type'])) {
|
|
logger('activity rejected: create actor');
|
|
return;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
$deliveries = null;
|
|
|
|
if (array_key_exists('recipients',$env) && count($env['recipients'])) {
|
|
logger('specific recipients');
|
|
logger('recipients: ' . print_r($env['recipients'],true),LOGGER_DEBUG);
|
|
|
|
$recip_arr = [];
|
|
foreach ($env['recipients'] as $recip) {
|
|
$recip_arr[] = $recip;
|
|
}
|
|
|
|
$r = false;
|
|
if ($recip_arr) {
|
|
stringify_array_elms($recip_arr,true);
|
|
$recips = implode(',',$recip_arr);
|
|
$r = q("select channel_hash as hash from channel where channel_hash in ( " . $recips . " ) and channel_removed = 0 ");
|
|
}
|
|
|
|
if (! $r) {
|
|
logger('recips: no recipients on this site');
|
|
return;
|
|
}
|
|
|
|
// Response messages will inherit the privacy of the parent
|
|
|
|
if ($env['type'] !== 'response') {
|
|
$private = true;
|
|
}
|
|
|
|
$deliveries = ids_to_array($r,'hash');
|
|
|
|
// We found somebody on this site that's in the recipient list.
|
|
}
|
|
else {
|
|
|
|
logger('public post');
|
|
|
|
|
|
// Public post. look for any site members who are or may be accepting posts from this sender
|
|
// and who are allowed to see them based on the sender's permissions
|
|
// @fixme;
|
|
|
|
$deliveries = self::public_recips($env,$AS);
|
|
}
|
|
|
|
$deliveries = array_unique($deliveries);
|
|
|
|
if (! $deliveries) {
|
|
logger('No deliveries on this site');
|
|
return;
|
|
}
|
|
|
|
|
|
if ($has_data) {
|
|
|
|
if (in_array($env['type'],['activity','response'])) {
|
|
|
|
$r = q("select hubloc_hash, hubloc_network, hubloc_url from hubloc where hubloc_id_url = '%s'",
|
|
dbesc($AS->actor['id'])
|
|
);
|
|
|
|
if ($r) {
|
|
$r = self::zot_record_preferred($r);
|
|
$arr['author_xchan'] = $r['hubloc_hash'];
|
|
}
|
|
|
|
if (! $arr['author_xchan']) {
|
|
logger('No author!');
|
|
return;
|
|
}
|
|
|
|
$s = q("select hubloc_hash, hubloc_url from hubloc where hubloc_id_url = '%s' and hubloc_network = 'zot6' limit 1",
|
|
dbesc($env['sender'])
|
|
);
|
|
|
|
// in individual delivery, change owner if needed
|
|
if ($s) {
|
|
$arr['owner_xchan'] = $s[0]['hubloc_hash'];
|
|
}
|
|
else {
|
|
$arr['owner_xchan'] = $env['sender'];
|
|
}
|
|
|
|
if ($private && (! intval($arr['item_private']))) {
|
|
$arr['item_private'] = 1;
|
|
}
|
|
if ($arr['mid'] === $arr['parent_mid']) {
|
|
if (is_array($AS->obj) && array_key_exists('commentPolicy',$AS->obj)) {
|
|
$p = strstr($AS->obj['commentPolicy'],'until=');
|
|
if($p !== false) {
|
|
$arr['comments_closed'] = datetime_convert('UTC','UTC', substr($p,6));
|
|
$arr['comment_policy'] = trim(str_replace($p,'',$AS->obj['commentPolicy']));
|
|
}
|
|
else {
|
|
$arr['comment_policy'] = $AS->obj['commentPolicy'];
|
|
}
|
|
}
|
|
}
|
|
if ($AS->data['hubloc']) {
|
|
$arr['item_verified'] = true;
|
|
|
|
if (! array_key_exists('comment_policy',$arr)) {
|
|
// set comment policy depending on source hub. Unknown or osada is ActivityPub.
|
|
// Anything else we'll say is zot - which could have a range of project names
|
|
$s = q("select site_project from site where site_url = '%s' limit 1",
|
|
dbesc($r[0]['hubloc_url'])
|
|
);
|
|
|
|
if ((! $s) || (in_array($s[0]['site_project'],[ '', 'osada' ]))) {
|
|
$arr['comment_policy'] = 'authenticated';
|
|
}
|
|
else {
|
|
$arr['comment_policy'] = 'contacts';
|
|
}
|
|
}
|
|
}
|
|
if ($AS->data['signed_data']) {
|
|
IConfig::Set($arr,'activitypub','signed_data',$AS->data['signed_data'],false);
|
|
$j = json_decode($AS->data['signed_data'],true);
|
|
if ($j) {
|
|
IConfig::Set($arr,'activitypub','rawmsg',json_encode(JSalmon::unpack($j['data'])),true);
|
|
}
|
|
}
|
|
|
|
logger('Activity received: ' . print_r($arr,true), LOGGER_DATA, LOG_DEBUG);
|
|
logger('Activity recipients: ' . print_r($deliveries,true), LOGGER_DATA, LOG_DEBUG);
|
|
|
|
$relay = (($env['type'] === 'response') ? true : false );
|
|
|
|
$result = self::process_delivery($env['sender'],$AS,$arr,$deliveries,$relay,false,$message_request);
|
|
}
|
|
elseif ($env['type'] === 'sync') {
|
|
|
|
$arr = json_decode($data,true);
|
|
|
|
logger('Channel sync received: ' . print_r($arr,true), LOGGER_DATA, LOG_DEBUG);
|
|
logger('Channel sync recipients: ' . print_r($deliveries,true), LOGGER_DATA, LOG_DEBUG);
|
|
|
|
$result = Libsync::process_channel_sync_delivery($env['sender'],$arr,$deliveries);
|
|
}
|
|
}
|
|
if ($result) {
|
|
$return = array_merge($return, $result);
|
|
}
|
|
return $return;
|
|
}
|
|
|
|
|
|
static function is_top_level($env,$act) {
|
|
if ($env['encoding'] === 'zot' && array_key_exists('flags',$env) && in_array('thread_parent', $env['flags'])) {
|
|
return true;
|
|
}
|
|
if ($act) {
|
|
if (in_array($act->type, ['Like','Dislike'])) {
|
|
return false;
|
|
}
|
|
$x = self::find_parent($env,$act);
|
|
if ($x === $act->id || (is_array($act->obj) && array_key_exists('id',$act->obj) && $x === $act->obj['id'])) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
static function find_parent($env,$act) {
|
|
if ($act) {
|
|
if (in_array($act->type, ['Like','Dislike'])) {
|
|
return $act->obj['id'];
|
|
}
|
|
if ($act->parent_id) {
|
|
return $act->parent_id;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief
|
|
*
|
|
* A public message with no listed recipients can be delivered to anybody who
|
|
* has PERMS_NETWORK for that type of post, PERMS_AUTHED (in-network senders are
|
|
* by definition authenticated) or PERMS_SITE and is one the same site,
|
|
* or PERMS_SPECIFIC and the sender is a contact who is granted permissions via
|
|
* their connection permissions in the address book.
|
|
* Here we take a given message and construct a list of hashes of everybody
|
|
* on the site that we should try and deliver to.
|
|
* Some of these will be rejected, but this gives us a place to start.
|
|
*
|
|
* @param array $msg
|
|
* @return NULL|array
|
|
*/
|
|
|
|
static function public_recips($msg, $act) {
|
|
|
|
$check_mentions = false;
|
|
$include_sys = false;
|
|
|
|
if ($msg['type'] === 'activity') {
|
|
$disable_discover_tab = get_config('system','disable_discover_tab') || get_config('system','disable_discover_tab') === false;
|
|
if (! $disable_discover_tab) {
|
|
$include_sys = true;
|
|
}
|
|
|
|
$perm = 'send_stream';
|
|
|
|
if (self::is_top_level($msg,$act)) {
|
|
$check_mentions = true;
|
|
}
|
|
}
|
|
elseif ($msg['type'] === 'mail') {
|
|
$perm = 'post_mail';
|
|
}
|
|
|
|
$r = [];
|
|
|
|
$c = q("select channel_id, channel_hash from channel where channel_removed = 0");
|
|
|
|
if ($c) {
|
|
foreach ($c as $cc) {
|
|
|
|
// top level activity sent to ourself: ignore. Clones will get a sync activity
|
|
// which is a true clone of the original item. Everything else is a duplicate.
|
|
|
|
if ($check_mentions && $cc['channel_hash'] === $msg['sender']) {
|
|
continue;
|
|
}
|
|
|
|
if (perm_is_allowed($cc['channel_id'],$msg['sender'],$perm)) {
|
|
$r[] = $cc['channel_hash'];
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($include_sys) {
|
|
$sys = get_sys_channel();
|
|
if ($sys) {
|
|
$r[] = $sys['channel_hash'];
|
|
}
|
|
}
|
|
|
|
// look for any public mentions on this site
|
|
// They will get filtered by tgroup_check() so we don't need to check permissions now
|
|
|
|
if ($check_mentions) {
|
|
// It's a top level post. Look at the tags. See if any of them are mentions and are on this hub.
|
|
if ($act && $act->obj) {
|
|
if (is_array($act->obj['tag']) && $act->obj['tag']) {
|
|
foreach ($act->obj['tag'] as $tag) {
|
|
if ($tag['type'] === 'Mention' && (strpos($tag['href'],z_root()) !== false)) {
|
|
$address = basename($tag['href']);
|
|
if ($address) {
|
|
$z = q("select channel_hash as hash from channel where channel_address = '%s'
|
|
and channel_hash != '%s' and channel_removed = 0 limit 1",
|
|
dbesc($address),
|
|
dbesc($msg['sender'])
|
|
);
|
|
if ($z) {
|
|
$r[] = $z[0]['hash'];
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($tag['type'] === 'topicalCollection' && strpos($tag['name'],App::get_hostname())) {
|
|
$address = substr($tag['name'],0,strpos($tag['name'],'@'));
|
|
if ($address) {
|
|
$z = q("select channel_hash as hash from channel where channel_address = '%s'
|
|
and channel_hash != '%s' and channel_removed = 0 limit 1",
|
|
dbesc($address),
|
|
dbesc($msg['sender'])
|
|
);
|
|
if ($z) {
|
|
$r[] = $z[0]['hash'];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
// This is a comment. We need to find any parent with ITEM_UPLINK set. But in fact, let's just return
|
|
// everybody that stored a copy of the parent. This way we know we're covered. We'll check the
|
|
// comment permissions when we deliver them.
|
|
|
|
$thread_parent = self::find_parent($msg,$act);
|
|
|
|
if ($thread_parent) {
|
|
$z = q("select channel_hash as hash from channel left join item on channel.channel_id = item.uid where ( item.thr_parent = '%s' OR item.parent_mid = '%s' ) ",
|
|
dbesc($thread_parent),
|
|
dbesc($thread_parent)
|
|
);
|
|
if ($z) {
|
|
foreach ($z as $zv) {
|
|
$r[] = $zv['hash'];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// There are probably a lot of duplicates in $r at this point. We need to filter those out.
|
|
// It's a bit of work since it's a multi-dimensional array
|
|
|
|
if ($r) {
|
|
$r = array_values(array_unique($r));
|
|
}
|
|
|
|
logger('public_recips: ' . print_r($r,true), LOGGER_DATA, LOG_DEBUG);
|
|
return $r;
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief
|
|
*
|
|
* @param array $sender
|
|
* @param ActivityStreams object $act
|
|
* @param array $msg_arr
|
|
* @param array $deliveries
|
|
* @param boolean $relay
|
|
* @param boolean $public (optional) default false
|
|
* @param boolean $request (optional) default false
|
|
* @return array
|
|
*/
|
|
|
|
static function process_delivery($sender, $act, $msg_arr, $deliveries, $relay, $public = false, $request = false) {
|
|
|
|
$result = [];
|
|
|
|
//logger('msg_arr: ' . print_r($msg_arr,true),LOGGER_ALL);
|
|
|
|
// If an upstream hop used ActivityPub, set the identities to zot6 nomadic identities where applicable
|
|
// else things could easily get confused
|
|
|
|
$msg_arr['author_xchan'] = Activity::find_best_identity($msg_arr['author_xchan']);
|
|
$msg_arr['owner_xchan'] = Activity::find_best_identity($msg_arr['owner_xchan']);
|
|
|
|
// We've validated the sender. Now make sure that the sender is the owner or author
|
|
|
|
if (! $public) {
|
|
if ($sender != $msg_arr['owner_xchan'] && $sender != $msg_arr['author_xchan']) {
|
|
logger("Sender $sender is not owner {$msg_arr['owner_xchan']} or author {$msg_arr['author_xchan']} - mid {$msg_arr['mid']}");
|
|
return;
|
|
}
|
|
}
|
|
|
|
foreach ($deliveries as $d) {
|
|
|
|
$local_public = $public;
|
|
|
|
// if any further changes are to be made, change a copy and not the original
|
|
$arr = $msg_arr;
|
|
|
|
$DR = new DReport(z_root(),$sender,$d,$arr['mid']);
|
|
|
|
$channel = channelx_by_hash($d);
|
|
|
|
if (! $channel) {
|
|
$DR->update('recipient not found');
|
|
$result[] = $DR->get();
|
|
continue;
|
|
}
|
|
|
|
$DR->set_name($channel['channel_name'] . ' <' . channel_reddress($channel) . '>');
|
|
|
|
if (($act) && ($act->obj) && (! is_array($act->obj))) {
|
|
|
|
// The initial object fetch failed using the sys channel credentials.
|
|
// Try again using the delivery channel credentials.
|
|
// We will also need to re-parse the $item array,
|
|
// but preserve any values that were set during anonymous parsing.
|
|
|
|
$o = Activity::fetch($act->obj,$channel);
|
|
if ($o) {
|
|
$act->obj = $o;
|
|
$arr = array_merge(Activity::decode_note($act),$arr);
|
|
}
|
|
else {
|
|
$DR->update('Incomplete or corrupt activity');
|
|
$result[] = $DR->get();
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* We need to block normal top-level message delivery from our clones, as the delivered
|
|
* message doesn't have ACL information in it as the cloned copy does. That copy
|
|
* will normally arrive first via sync delivery, but this isn't guaranteed.
|
|
* There's a chance the current delivery could take place before the cloned copy arrives
|
|
* hence the item could have the wrong ACL and *could* be used in subsequent deliveries or
|
|
* access checks.
|
|
*/
|
|
|
|
if ($sender === $channel['channel_hash'] && $arr['author_xchan'] === $channel['channel_hash'] && $arr['mid'] === $arr['parent_mid']) {
|
|
$DR->update('self delivery ignored');
|
|
$result[] = $DR->get();
|
|
continue;
|
|
}
|
|
|
|
// allow public postings to the sys channel regardless of permissions, but not
|
|
// for comments travelling upstream. Wait and catch them on the way down.
|
|
// They may have been blocked by the owner.
|
|
|
|
if (intval($channel['channel_system']) && (! $arr['item_private']) && (! $relay)) {
|
|
$local_public = true;
|
|
|
|
if (! check_pubstream_channelallowed($sender)) {
|
|
$local_public = false;
|
|
continue;
|
|
}
|
|
|
|
// don't allow pubstream posts if the sender even has a clone on a pubstream blacklisted site
|
|
|
|
$siteallowed = true;
|
|
$h = q("select hubloc_url from hubloc where hubloc_hash = '%s'",
|
|
dbesc($sender)
|
|
);
|
|
if ($h) {
|
|
foreach ($h as $hub) {
|
|
if (! check_pubstream_siteallowed($hub['hubloc_url'])) {
|
|
$siteallowed = false;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (! $siteallowed) {
|
|
$local_public = false;
|
|
continue;
|
|
}
|
|
|
|
$r = q("select xchan_selfcensored from xchan where xchan_hash = '%s' limit 1",
|
|
dbesc($sender)
|
|
);
|
|
// don't import sys channel posts from selfcensored authors
|
|
if ($r && (intval($r[0]['xchan_selfcensored']))) {
|
|
$local_public = false;
|
|
continue;
|
|
}
|
|
if (! MessageFilter::evaluate($arr,get_config('system','pubstream_incl'),get_config('system','pubstream_excl'))) {
|
|
$local_public = false;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
$tag_delivery = tgroup_check($channel['channel_id'],$arr);
|
|
|
|
$perm = 'send_stream';
|
|
if (($arr['mid'] !== $arr['parent_mid']) && ($relay))
|
|
$perm = 'post_comments';
|
|
|
|
// This is our own post, possibly coming from a channel clone
|
|
|
|
if ($arr['owner_xchan'] == $d) {
|
|
$arr['item_wall'] = 1;
|
|
}
|
|
else {
|
|
$arr['item_wall'] = 0;
|
|
}
|
|
|
|
$friendofriend = false;
|
|
|
|
if ((! $tag_delivery) && (! $local_public)) {
|
|
$allowed = (perm_is_allowed($channel['channel_id'],$sender,$perm));
|
|
if ((! $allowed) && $perm === 'post_comments') {
|
|
$parent = q("select * from item where mid = '%s' and uid = %d limit 1",
|
|
dbesc($arr['parent_mid']),
|
|
intval($channel['channel_id'])
|
|
);
|
|
if ($parent) {
|
|
$allowed = can_comment_on_post($sender,$parent[0]);
|
|
}
|
|
}
|
|
if ($request) {
|
|
|
|
// Conversation fetches (e.g. $request == true) take place for
|
|
// a) new comments on expired posts
|
|
// b) hyperdrive (friend-of-friend) conversations
|
|
|
|
|
|
// over-ride normal connection permissions for hyperdrive (friend-of-friend) conversations
|
|
// (if hyperdrive is enabled).
|
|
// If $allowed is already true, this is probably the conversation of a direct friend or a
|
|
// conversation fetch for a new comment on an expired post
|
|
// Comments of all these activities are allowed and will only be rejected (later) if the parent
|
|
// doesn't exist.
|
|
|
|
if ($perm === 'send_stream') {
|
|
if (get_pconfig($channel['channel_id'],'system','hyperdrive',false)) {
|
|
$allowed = true;
|
|
}
|
|
}
|
|
else {
|
|
$allowed = true;
|
|
}
|
|
|
|
$friendofriend = true;
|
|
}
|
|
|
|
if (! $allowed) {
|
|
logger("permission denied for delivery to channel {$channel['channel_id']} {$channel['channel_address']}");
|
|
$DR->update('permission denied');
|
|
$result[] = $DR->get();
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if ($arr['mid'] !== $arr['parent_mid']) {
|
|
|
|
if (perm_is_allowed($channel['channel_id'],$sender,'moderated') && $relay) {
|
|
$arr['item_blocked'] = ITEM_MODERATED;
|
|
}
|
|
|
|
// check source route.
|
|
// We are only going to accept comments from this sender if the comment has the same route as the top-level-post,
|
|
// this is so that permissions mismatches between senders apply to the entire conversation
|
|
// As a side effect we will also do a preliminary check that we have the top-level-post, otherwise
|
|
// processing it is pointless.
|
|
|
|
$r = q("select route, id, parent_mid, mid, owner_xchan, item_private from item where mid = '%s' and uid = %d limit 1",
|
|
dbesc($arr['parent_mid']),
|
|
intval($channel['channel_id'])
|
|
);
|
|
if ($r) {
|
|
// if this is a multi-threaded conversation, preserve the threading information
|
|
if ($r[0]['parent_mid'] !== $r[0]['mid']) {
|
|
$arr['thr_parent'] = $arr['parent_mid'];
|
|
$arr['parent_mid'] = $r[0]['parent_mid'];
|
|
}
|
|
}
|
|
else {
|
|
$DR->update('comment parent not found');
|
|
$result[] = $DR->get();
|
|
|
|
// We don't seem to have a copy of this conversation or at least the parent
|
|
// - so request a copy of the entire conversation to date.
|
|
// Don't do this if it's a relay post as we're the ones who are supposed to
|
|
// have the copy and we don't want the request to loop.
|
|
// Also don't do this if this comment came from a conversation request packet.
|
|
// It's possible that comments are allowed but posting isn't and that could
|
|
// cause a conversation fetch loop.
|
|
// We'll also check the send_stream permission - because if it isn't allowed,
|
|
// the top level post is unlikely to be imported and
|
|
// this is just an exercise in futility.
|
|
|
|
if ((! $relay) && (! $request) && (! $local_public)
|
|
&& perm_is_allowed($channel['channel_id'],$sender,'send_stream')) {
|
|
self::fetch_conversation($channel,$arr['parent_mid']);
|
|
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if ($relay || $friendofriend || (intval($r[0]['item_private']) === 0 && intval($arr['item_private']) === 0)) {
|
|
// reset the route in case it travelled a great distance upstream
|
|
// use our parent's route so when we go back downstream we'll match
|
|
// with whatever route our parent has.
|
|
// Also friend-of-friend conversations may have been imported without a route,
|
|
// but we are now getting comments via listener delivery
|
|
// and if there is no privacy on this or the parent, we don't care about the route,
|
|
// so just set the owner and route accordingly.
|
|
$arr['route'] = $r[0]['route'];
|
|
$arr['owner_xchan'] = $r[0]['owner_xchan'];
|
|
}
|
|
else {
|
|
|
|
// going downstream check that we have the same upstream provider that
|
|
// sent it to us originally. Ignore it if it came from another source
|
|
// (with potentially different permissions).
|
|
// only compare the last hop since it could have arrived at the last location any number of ways.
|
|
// Always accept empty routes and firehose items (route contains 'undefined') .
|
|
|
|
$existing_route = explode(',', $r[0]['route']);
|
|
$routes = count($existing_route);
|
|
if ($routes) {
|
|
$last_hop = array_pop($existing_route);
|
|
$last_prior_route = implode(',',$existing_route);
|
|
}
|
|
else {
|
|
$last_hop = '';
|
|
$last_prior_route = '';
|
|
}
|
|
|
|
if (in_array('undefined',$existing_route) || $last_hop == 'undefined' || $sender == 'undefined') {
|
|
$last_hop = '';
|
|
}
|
|
|
|
$current_route = (($arr['route']) ? $arr['route'] . ',' : '') . $sender;
|
|
|
|
if ($last_hop && $last_hop != $sender) {
|
|
logger('comment route mismatch: parent route = ' . $r[0]['route'] . ' expected = ' . $current_route, LOGGER_DEBUG);
|
|
logger('comment route mismatch: parent msg = ' . $r[0]['id'],LOGGER_DEBUG);
|
|
$DR->update('comment route mismatch');
|
|
$result[] = $DR->get();
|
|
continue;
|
|
}
|
|
|
|
// we'll add sender onto this when we deliver it. $last_prior_route now has the previously stored route
|
|
// *except* for the sender which would've been the last hop before it got to us.
|
|
|
|
$arr['route'] = $last_prior_route;
|
|
}
|
|
}
|
|
|
|
$ab = q("select * from abook where abook_channel = %d and abook_xchan = '%s'",
|
|
intval($channel['channel_id']),
|
|
dbesc($arr['owner_xchan'])
|
|
);
|
|
$abook = (($ab) ? $ab[0] : null);
|
|
|
|
if (intval($arr['item_deleted'])) {
|
|
|
|
// remove_community_tag is a no-op if this isn't a community tag activity
|
|
self::remove_community_tag($sender,$arr,$channel['channel_id']);
|
|
|
|
// set these just in case we need to store a fresh copy of the deleted post.
|
|
// This could happen if the delete got here before the original post did.
|
|
|
|
$arr['aid'] = $channel['channel_account_id'];
|
|
$arr['uid'] = $channel['channel_id'];
|
|
|
|
$item_id = self::delete_imported_item($sender,$arr,$channel['channel_id'],$relay);
|
|
$DR->update(($item_id) ? 'deleted' : 'delete_failed');
|
|
$result[] = $DR->get();
|
|
|
|
if ($relay && $item_id) {
|
|
logger('process_delivery: invoking relay');
|
|
Master::Summon([ 'Notifier', 'relay', intval($item_id) ]);
|
|
$DR->update('relayed');
|
|
$result[] = $DR->get();
|
|
}
|
|
continue;
|
|
}
|
|
|
|
|
|
$r = q("select * from item where mid = '%s' and uid = %d limit 1",
|
|
dbesc($arr['mid']),
|
|
intval($channel['channel_id'])
|
|
);
|
|
if ($r) {
|
|
// We already have this post.
|
|
$item_id = $r[0]['id'];
|
|
|
|
if (intval($r[0]['item_deleted'])) {
|
|
// It was deleted locally.
|
|
$DR->update('update ignored');
|
|
$result[] = $DR->get();
|
|
|
|
continue;
|
|
}
|
|
// Maybe it has been edited?
|
|
elseif ($arr['edited'] > $r[0]['edited']) {
|
|
$arr['id'] = $r[0]['id'];
|
|
$arr['uid'] = $channel['channel_id'];
|
|
if (($arr['mid'] == $arr['parent_mid']) && (! post_is_importable($channel['channel_id'],$arr,$abook))) {
|
|
$DR->update('update ignored');
|
|
$result[] = $DR->get();
|
|
}
|
|
else {
|
|
$item_result = self::update_imported_item($sender,$arr,$r[0],$channel['channel_id'],$tag_delivery);
|
|
$DR->update('updated');
|
|
$result[] = $DR->get();
|
|
if(! $relay)
|
|
add_source_route($item_id,$sender);
|
|
}
|
|
}
|
|
else {
|
|
$DR->update('update ignored');
|
|
$result[] = $DR->get();
|
|
|
|
// We need this line to ensure wall-to-wall comments are relayed (by falling through to the relay bit),
|
|
// and at the same time not relay any other relayable posts more than once, because to do so is very wasteful.
|
|
if (! intval($r[0]['item_origin'])) {
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
$arr['aid'] = $channel['channel_account_id'];
|
|
$arr['uid'] = $channel['channel_id'];
|
|
|
|
// if it's a sourced post, call the post_local hooks as if it were
|
|
// posted locally so that crosspost connectors will be triggered.
|
|
|
|
if (check_item_source($arr['uid'], $arr)) {
|
|
/**
|
|
* @hooks post_local
|
|
* Called when an item has been posted on this machine via mod/item.php (also via API).
|
|
* * \e array with an item
|
|
*/
|
|
call_hooks('post_local', $arr);
|
|
}
|
|
|
|
$item_id = 0;
|
|
|
|
if (($arr['mid'] == $arr['parent_mid']) && (! post_is_importable($arr['uid'],$arr,$abook))) {
|
|
$DR->update('post ignored');
|
|
$result[] = $DR->get();
|
|
}
|
|
else {
|
|
|
|
// Strip old-style hubzilla bookmarks
|
|
if (strpos($arr['body'],"#^[") !== false) {
|
|
$arr['body'] = str_replace("#^[","[",$arr['body']);
|
|
}
|
|
|
|
$item_result = item_store($arr);
|
|
if ($item_result['success']) {
|
|
$item_id = $item_result['item_id'];
|
|
$parr = [
|
|
'item_id' => $item_id,
|
|
'item' => $arr,
|
|
'sender' => $sender,
|
|
'channel' => $channel
|
|
];
|
|
/**
|
|
* @hooks activity_received
|
|
* Called when an activity (post, comment, like, etc.) has been received from a zot source.
|
|
* * \e int \b item_id
|
|
* * \e array \b item
|
|
* * \e array \b sender
|
|
* * \e array \b channel
|
|
*/
|
|
call_hooks('activity_received', $parr);
|
|
// don't add a source route if it's a relay or later recipients will get a route mismatch
|
|
if (! $relay) {
|
|
add_source_route($item_id,$sender);
|
|
}
|
|
}
|
|
$DR->update(($item_id) ? 'posted' : 'storage failed: ' . $item_result['message']);
|
|
$result[] = $DR->get();
|
|
}
|
|
}
|
|
|
|
// preserve conversations with which you are involved from expiration
|
|
|
|
$stored = (($item_result && $item_result['item']) ? $item_result['item'] : false);
|
|
if ((is_array($stored)) && ($stored['id'] != $stored['parent'])
|
|
&& ($stored['author_xchan'] === $channel['channel_hash'])) {
|
|
retain_item($stored['item']['parent']);
|
|
}
|
|
|
|
if ($relay && $item_id) {
|
|
logger('Invoking relay');
|
|
Master::Summon([ 'Notifier', 'relay', intval($item_id) ]);
|
|
$DR->addto_update('relayed');
|
|
$result[] = $DR->get();
|
|
}
|
|
}
|
|
|
|
if (! $deliveries) {
|
|
$result[] = array('', 'no recipients', '', $arr['mid']);
|
|
}
|
|
|
|
logger('Local results: ' . print_r($result, true), LOGGER_DEBUG);
|
|
|
|
return $result;
|
|
}
|
|
|
|
static public function hyperdrive_enabled($channel,$item) {
|
|
|
|
if (get_pconfig($channel['channel_id'],'system','hyperdrive',true)) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static public function fetch_conversation($channel,$mid) {
|
|
|
|
// Use Zotfinger to create a signed request
|
|
|
|
logger('fetching conversation: ' . $mid, LOGGER_DEBUG);
|
|
|
|
$a = Zotfinger::exec($mid,$channel);
|
|
|
|
logger('received conversation: ' . print_r($a,true), LOGGER_DATA);
|
|
|
|
if (! $a) {
|
|
return false;
|
|
}
|
|
|
|
if ($a['data']['type'] !== 'OrderedCollection') {
|
|
return false;
|
|
}
|
|
|
|
if (! intval($a['data']['totalItems'])) {
|
|
return false;
|
|
}
|
|
|
|
$ret = [];
|
|
|
|
|
|
$signer = q("select hubloc_hash, hubloc_url from hubloc where hubloc_id_url = '%s' and hubloc_network = 'zot6' limit 1",
|
|
dbesc($a['signature']['signer'])
|
|
);
|
|
|
|
|
|
foreach ($a['data']['orderedItems'] as $activity) {
|
|
|
|
$AS = new ActivityStreams($activity);
|
|
if (! $AS->is_valid()) {
|
|
logger('FOF Activity rejected: ' . print_r($activity,true));
|
|
continue;
|
|
}
|
|
$arr = Activity::decode_note($AS);
|
|
|
|
// logger($AS->debug());
|
|
|
|
$r = q("select hubloc_hash from hubloc where hubloc_id_url = '%s' limit 1",
|
|
dbesc($AS->actor['id'])
|
|
);
|
|
|
|
if (! $r) {
|
|
$y = import_author_xchan([ 'url' => $AS->actor['id'] ]);
|
|
if ($y) {
|
|
$r = q("select hubloc_hash from hubloc where hubloc_id_url = '%s' limit 1",
|
|
dbesc($AS->actor['id'])
|
|
);
|
|
}
|
|
if (! $r) {
|
|
logger('FOF Activity: no actor');
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if ($AS->obj['actor'] && $AS->obj['actor']['id'] && $AS->obj['actor']['id'] !== $AS->actor['id']) {
|
|
$y = import_author_xchan([ 'url' => $AS->obj['actor']['id'] ]);
|
|
if (! $y) {
|
|
logger('FOF Activity: no object actor');
|
|
continue;
|
|
}
|
|
}
|
|
|
|
|
|
if ($r) {
|
|
$arr['author_xchan'] = $r[0]['hubloc_hash'];
|
|
}
|
|
|
|
if ($signer) {
|
|
$arr['owner_xchan'] = $signer[0]['hubloc_hash'];
|
|
}
|
|
else {
|
|
$arr['owner_xchan'] = $a['signature']['signer'];
|
|
}
|
|
|
|
if ($AS->data['hubloc'] || $arr['author_xchan'] === $arr['owner_xchan']) {
|
|
$arr['item_verified'] = true;
|
|
}
|
|
|
|
// set comment policy depending on source hub. Unknown or osada is ActivityPub.
|
|
// Anything else we'll say is zot - which could have a range of project names
|
|
|
|
if ($signer) {
|
|
$s = q("select site_project from site where site_url = '%s' limit 1",
|
|
dbesc($signer[0]['hubloc_url'])
|
|
);
|
|
if ((! $s) || (in_array($s[0]['site_project'],[ '', 'osada' ]))) {
|
|
$arr['comment_policy'] = 'authenticated';
|
|
}
|
|
else {
|
|
$arr['comment_policy'] = 'contacts';
|
|
}
|
|
|
|
}
|
|
|
|
if ($AS->data['signed_data']) {
|
|
IConfig::Set($arr,'activitystreams','signed_data',$AS->data['signed_data'],false);
|
|
}
|
|
|
|
logger('FOF Activity received: ' . print_r($arr,true), LOGGER_DATA, LOG_DEBUG);
|
|
logger('FOF Activity recipient: ' . $channel['channel_hash'], LOGGER_DATA, LOG_DEBUG);
|
|
|
|
$result = self::process_delivery($arr['owner_xchan'],$AS,$arr, [ $channel['channel_hash'] ],false,false,true);
|
|
if ($result) {
|
|
$ret = array_merge($ret, $result);
|
|
}
|
|
}
|
|
|
|
return $ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Remove community tag.
|
|
*
|
|
* @param array $sender an associative array with
|
|
* * \e string \b hash a xchan_hash
|
|
* @param array $arr an associative array
|
|
* * \e int \b verb
|
|
* * \e int \b obj_type
|
|
* * \e int \b mid
|
|
* @param int $uid
|
|
*/
|
|
|
|
static function remove_community_tag($sender, $arr, $uid) {
|
|
|
|
if (! (activity_match($arr['verb'], ACTIVITY_TAG) && ($arr['obj_type'] == ACTIVITY_OBJ_TAGTERM)))
|
|
return;
|
|
|
|
logger('remove_community_tag: invoked');
|
|
|
|
if (! get_pconfig($uid,'system','blocktags')) {
|
|
logger('Permission denied.');
|
|
return;
|
|
}
|
|
|
|
$r = q("select * from item where mid = '%s' and uid = %d limit 1",
|
|
dbesc($arr['mid']),
|
|
intval($uid)
|
|
);
|
|
if (! $r) {
|
|
logger('No item');
|
|
return;
|
|
}
|
|
|
|
if (($sender != $r[0]['owner_xchan']) && ($sender != $r[0]['author_xchan'])) {
|
|
logger('Sender not authorised.');
|
|
return;
|
|
}
|
|
|
|
$i = $r[0];
|
|
|
|
if ($i['target']) {
|
|
$i['target'] = json_decode($i['target'],true);
|
|
}
|
|
if ($i['object']) {
|
|
$i['object'] = json_decode($i['object'],true);
|
|
}
|
|
if (! ($i['target'] && $i['object'])) {
|
|
logger('No target/object');
|
|
return;
|
|
}
|
|
|
|
$message_id = $i['target']['id'];
|
|
|
|
$r = q("select id from item where mid = '%s' and uid = %d limit 1",
|
|
dbesc($message_id),
|
|
intval($uid)
|
|
);
|
|
if (! $r) {
|
|
logger('No parent message');
|
|
return;
|
|
}
|
|
|
|
q("delete from term where uid = %d and oid = %d and otype = %d and ttype in ( %d, %d ) and term = '%s' and url = '%s'",
|
|
intval($uid),
|
|
intval($r[0]['id']),
|
|
intval(TERM_OBJ_POST),
|
|
intval(TERM_HASHTAG),
|
|
intval(TERM_COMMUNITYTAG),
|
|
dbesc($i['object']['title']),
|
|
dbesc(get_rel_link($i['object']['link'],'alternate'))
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @brief Updates an imported item.
|
|
*
|
|
* @see item_store_update()
|
|
*
|
|
* @param array $sender
|
|
* @param array $item
|
|
* @param array $orig
|
|
* @param int $uid
|
|
* @param boolean $tag_delivery
|
|
*/
|
|
|
|
static function update_imported_item($sender, $item, $orig, $uid, $tag_delivery) {
|
|
|
|
// If this is a comment being updated, remove any privacy information
|
|
// so that item_store_update will set it from the original.
|
|
|
|
if ($item['mid'] !== $item['parent_mid']) {
|
|
unset($item['allow_cid']);
|
|
unset($item['allow_gid']);
|
|
unset($item['deny_cid']);
|
|
unset($item['deny_gid']);
|
|
unset($item['item_private']);
|
|
}
|
|
|
|
// we need the tag_delivery check for downstream flowing posts as the stored post
|
|
// may have a different owner than the one being transmitted.
|
|
|
|
if (($sender != $orig['owner_xchan'] && $sender != $orig['author_xchan']) && (! $tag_delivery)) {
|
|
logger('sender is not owner or author');
|
|
return;
|
|
}
|
|
|
|
|
|
$x = item_store_update($item);
|
|
|
|
// If we're updating an event that we've saved locally, we store the item info first
|
|
// because event_addtocal will parse the body to get the 'new' event details
|
|
|
|
if ($orig['resource_type'] === 'event') {
|
|
$res = event_addtocal($orig['id'], $uid);
|
|
if (! $res) {
|
|
logger('update event: failed');
|
|
}
|
|
}
|
|
|
|
if (! $x['item_id']) {
|
|
logger('update_imported_item: failed: ' . $x['message']);
|
|
}
|
|
else {
|
|
logger('update_imported_item');
|
|
}
|
|
|
|
return $x;
|
|
}
|
|
|
|
/**
|
|
* @brief Deletes an imported item.
|
|
*
|
|
* @param array $sender
|
|
* * \e string \b hash a xchan_hash
|
|
* @param array $item
|
|
* @param int $uid
|
|
* @param boolean $relay
|
|
* @return boolean|int post_id
|
|
*/
|
|
|
|
static function delete_imported_item($sender, $item, $uid, $relay) {
|
|
|
|
logger('invoked', LOGGER_DEBUG);
|
|
|
|
$ownership_valid = false;
|
|
$item_found = false;
|
|
$post_id = 0;
|
|
|
|
$r = q("select * from item where ( author_xchan = '%s' or owner_xchan = '%s' or source_xchan = '%s' )
|
|
and mid = '%s' and uid = %d limit 1",
|
|
dbesc($sender),
|
|
dbesc($sender),
|
|
dbesc($sender),
|
|
dbesc($item['mid']),
|
|
intval($uid)
|
|
);
|
|
|
|
if ($r) {
|
|
$stored = $r[0];
|
|
if ($stored['author_xchan'] === $sender || $stored['owner_xchan'] === $sender || $stored['source_xchan'] === $sender) {
|
|
$ownership_valid = true;
|
|
}
|
|
|
|
$post_id = $stored['id'];
|
|
$item_found = true;
|
|
}
|
|
else {
|
|
|
|
// perhaps the item is still in transit and the delete notification got here before the actual item did. Store it with the deleted flag set.
|
|
// item_store() won't try to deliver any notifications or start delivery chains if this flag is set.
|
|
// This means we won't end up with potentially even more delivery threads trying to push this delete notification.
|
|
// But this will ensure that if the (undeleted) original post comes in at a later date, we'll reject it because it will have an older timestamp.
|
|
|
|
logger('delete received for non-existent item - storing item data.');
|
|
|
|
if ($item['author_xchan'] === $sender || $item['owner_xchan'] === $sender || $item['source_xchan'] === $sender) {
|
|
$ownership_valid = true;
|
|
$item_result = item_store($item);
|
|
$post_id = $item_result['item_id'];
|
|
}
|
|
}
|
|
|
|
if ($ownership_valid === false) {
|
|
logger('delete_imported_item: failed: ownership issue');
|
|
return false;
|
|
}
|
|
|
|
if ($stored['resource_type'] === 'event') {
|
|
$i = q("SELECT * FROM event WHERE event_hash = '%s' AND uid = %d LIMIT 1",
|
|
dbesc($stored['resource_id']),
|
|
intval($uid)
|
|
);
|
|
if ($i) {
|
|
if ($i[0]['event_xchan'] === $sender) {
|
|
q("delete from event where event_hash = '%s' and uid = %d",
|
|
dbesc($stored['resource_id']),
|
|
intval($uid)
|
|
);
|
|
}
|
|
else {
|
|
logger('delete linked event: not owner');
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
if ($item_found) {
|
|
if (intval($stored['item_deleted'])) {
|
|
logger('delete_imported_item: item was already deleted');
|
|
if (! $relay) {
|
|
return false;
|
|
}
|
|
|
|
// This is a bit hackish, but may have to suffice until the notification/delivery loop is optimised
|
|
// a bit further. We're going to strip the ITEM_ORIGIN on this item if it's a comment, because
|
|
// it was already deleted, and we're already relaying, and this ensures that no other process or
|
|
// code path downstream can relay it again (causing a loop). Since it's already gone it's not coming
|
|
// back, and we aren't going to (or shouldn't at any rate) delete it again in the future - so losing
|
|
// this information from the metadata should have no other discernible impact.
|
|
|
|
if (($stored['id'] != $stored['parent']) && intval($stored['item_origin'])) {
|
|
q("update item set item_origin = 0 where id = %d and uid = %d",
|
|
intval($stored['id']),
|
|
intval($stored['uid'])
|
|
);
|
|
}
|
|
}
|
|
|
|
|
|
// Use phased deletion to set the deleted flag, call both tag_deliver and the notifier to notify downstream channels
|
|
// and then clean up after ourselves with a cron job after several days to do the delete_item_lowlevel() (DROPITEM_PHASE2).
|
|
|
|
drop_item($post_id, false, DROPITEM_PHASE1);
|
|
tag_deliver($uid, $post_id);
|
|
}
|
|
|
|
return $post_id;
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Processes delivery of profile.
|
|
*
|
|
* @see import_directory_profile()
|
|
* @param array $sender an associative array
|
|
* * \e string \b hash a xchan_hash
|
|
* @param array $arr
|
|
* @param array $deliveries (unused)
|
|
*/
|
|
|
|
static function process_profile_delivery($sender, $arr, $deliveries) {
|
|
|
|
logger('process_profile_delivery', LOGGER_DEBUG);
|
|
|
|
$r = q("select xchan_addr from xchan where xchan_hash = '%s' limit 1",
|
|
dbesc($sender['hash'])
|
|
);
|
|
if ($r) {
|
|
Libzotdir::import_directory_profile($sender, $arr, $r[0]['xchan_addr'], UPDATE_FLAGS_UPDATED, 0);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief
|
|
*
|
|
* @param array $sender an associative array
|
|
* * \e string \b hash a xchan_hash
|
|
* @param array $arr
|
|
* @param array $deliveries (unused) deliveries is irrelevant
|
|
*/
|
|
static function process_location_delivery($sender, $arr, $deliveries) {
|
|
|
|
// deliveries is irrelevant
|
|
logger('process_location_delivery', LOGGER_DEBUG);
|
|
|
|
$r = q("select * from xchan where xchan_hash = '%s' limit 1",
|
|
dbesc($sender)
|
|
);
|
|
if ($r) {
|
|
$xchan = [ 'id' => $r[0]['xchan_guid'], 'id_sig' => $r[0]['xchan_guid_sig'],
|
|
'hash' => $r[0]['xchan_hash'], 'public_key' => $r[0]['xchan_pubkey'] ];
|
|
}
|
|
if (array_key_exists('locations',$arr) && $arr['locations']) {
|
|
$x = Libsync::sync_locations($xchan,$arr,true);
|
|
logger('results: ' . print_r($x,true), LOGGER_DEBUG);
|
|
if ($x['changed']) {
|
|
$guid = random_string() . '@' . App::get_hostname();
|
|
Libzotdir::update_modtime($sender,$r[0]['xchan_guid'],$arr['locations'][0]['address'],UPDATE_FLAGS_UPDATED);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Checks for a moved channel and sets the channel_moved flag.
|
|
*
|
|
* Currently the effect of this flag is to turn the channel into 'read-only' mode.
|
|
* New content will not be processed (there was still an issue with blocking the
|
|
* ability to post comments as of 10-Mar-2016).
|
|
* We do not physically remove the channel at this time. The hub admin may choose
|
|
* to do so, but is encouraged to allow a grace period of several days in case there
|
|
* are any issues migrating content. This packet will generally be received by the
|
|
* original site when the basic channel import has been processed.
|
|
*
|
|
* This will only be executed on the old location
|
|
* if a new location is reported and there is only one location record.
|
|
* The rest of the hubloc syncronisation will be handled within
|
|
* sync_locations
|
|
*
|
|
* @param string $sender_hash A channel hash
|
|
* @param array $locations
|
|
*/
|
|
|
|
static function check_location_move($sender_hash, $locations) {
|
|
|
|
if (! $locations) {
|
|
return;
|
|
}
|
|
|
|
if (count($locations) != 1) {
|
|
return;
|
|
}
|
|
|
|
$loc = $locations[0];
|
|
|
|
$r = q("select * from channel where channel_hash = '%s' limit 1",
|
|
dbesc($sender_hash)
|
|
);
|
|
|
|
if (! $r) {
|
|
return;
|
|
}
|
|
|
|
if ($loc['url'] !== z_root()) {
|
|
$x = q("update channel set channel_moved = '%s' where channel_hash = '%s' limit 1",
|
|
dbesc($loc['url']),
|
|
dbesc($sender_hash)
|
|
);
|
|
|
|
// federation plugins may wish to notify connections
|
|
// of the move on singleton networks
|
|
|
|
$arr = [
|
|
'channel' => $r[0],
|
|
'locations' => $locations
|
|
];
|
|
/**
|
|
* @hooks location_move
|
|
* Called when a new location has been provided to a UNO channel (indicating a move rather than a clone).
|
|
* * \e array \b channel
|
|
* * \e array \b locations
|
|
*/
|
|
call_hooks('location_move', $arr);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* @brief Returns an array with all known distinct hubs for this channel.
|
|
*
|
|
* @see self::get_hublocs()
|
|
* @param array $channel an associative array which must contain
|
|
* * \e string \b channel_hash the hash of the channel
|
|
* @return array an array with associative arrays
|
|
*/
|
|
|
|
static function encode_locations($channel) {
|
|
$ret = [];
|
|
|
|
$x = self::get_hublocs($channel['channel_hash']);
|
|
|
|
if ($x && count($x)) {
|
|
foreach ($x as $hub) {
|
|
|
|
// if this is a local channel that has been deleted, the hubloc is no good - make sure it is marked deleted
|
|
// so that nobody tries to use it.
|
|
|
|
if (intval($channel['channel_removed']) && $hub['hubloc_url'] === z_root()) {
|
|
$hub['hubloc_deleted'] = 1;
|
|
}
|
|
|
|
$ret[] = [
|
|
'host' => $hub['hubloc_host'],
|
|
'address' => $hub['hubloc_addr'],
|
|
'id_url' => $hub['hubloc_id_url'],
|
|
'primary' => (intval($hub['hubloc_primary']) ? true : false),
|
|
'url' => $hub['hubloc_url'],
|
|
'url_sig' => $hub['hubloc_url_sig'],
|
|
'site_id' => $hub['hubloc_site_id'],
|
|
'callback' => $hub['hubloc_callback'],
|
|
'sitekey' => $hub['hubloc_sitekey'],
|
|
'deleted' => (intval($hub['hubloc_deleted']) ? true : false)
|
|
];
|
|
}
|
|
}
|
|
|
|
return $ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief
|
|
*
|
|
* @param array $arr
|
|
* @param string $pubkey
|
|
* @return boolean true if updated or inserted
|
|
*/
|
|
|
|
static function import_site($arr) {
|
|
|
|
if ( (! is_array($arr)) || (! $arr['url']) || (! $arr['site_sig'])) {
|
|
return false;
|
|
}
|
|
|
|
if (! self::verify($arr['url'], $arr['site_sig'], $arr['sitekey'])) {
|
|
logger('Bad url_sig');
|
|
return false;
|
|
}
|
|
|
|
$update = false;
|
|
$exists = false;
|
|
|
|
$r = q("select * from site where site_url = '%s' limit 1",
|
|
dbesc($arr['url'])
|
|
);
|
|
if ($r) {
|
|
$exists = true;
|
|
$siterecord = $r[0];
|
|
}
|
|
|
|
$site_directory = 0;
|
|
if ($arr['directory_mode'] == 'normal') {
|
|
$site_directory = DIRECTORY_MODE_NORMAL;
|
|
}
|
|
if ($arr['directory_mode'] == 'primary') {
|
|
$site_directory = DIRECTORY_MODE_PRIMARY;
|
|
}
|
|
if ($arr['directory_mode'] == 'secondary') {
|
|
$site_directory = DIRECTORY_MODE_SECONDARY;
|
|
}
|
|
if ($arr['directory_mode'] == 'standalone') {
|
|
$site_directory = DIRECTORY_MODE_STANDALONE;
|
|
}
|
|
|
|
$register_policy = 0;
|
|
if ($arr['register_policy'] == 'closed') {
|
|
$register_policy = REGISTER_CLOSED;
|
|
}
|
|
if ($arr['register_policy'] == 'open') {
|
|
$register_policy = REGISTER_OPEN;
|
|
}
|
|
if ($arr['register_policy'] == 'approve') {
|
|
$register_policy = REGISTER_APPROVE;
|
|
}
|
|
|
|
$access_policy = 0;
|
|
if (array_key_exists('access_policy',$arr)) {
|
|
if ($arr['access_policy'] === 'private') {
|
|
$access_policy = ACCESS_PRIVATE;
|
|
}
|
|
if ($arr['access_policy'] === 'paid') {
|
|
$access_policy = ACCESS_PAID;
|
|
}
|
|
if ($arr['access_policy'] === 'free') {
|
|
$access_policy = ACCESS_FREE;
|
|
}
|
|
if ($arr['access_policy'] === 'tiered') {
|
|
$access_policy = ACCESS_TIERED;
|
|
}
|
|
}
|
|
|
|
// don't let insecure sites register as public hubs
|
|
|
|
if (strpos($arr['url'],'https://') === false) {
|
|
$access_policy = ACCESS_PRIVATE;
|
|
}
|
|
|
|
if ($access_policy != ACCESS_PRIVATE) {
|
|
$x = z_fetch_url($arr['url'] . '/siteinfo.json');
|
|
if (! $x['success'])
|
|
$access_policy = ACCESS_PRIVATE;
|
|
}
|
|
|
|
$directory_url = htmlspecialchars($arr['directory_url'],ENT_COMPAT,'UTF-8',false);
|
|
$url = htmlspecialchars(strtolower($arr['url']),ENT_COMPAT,'UTF-8',false);
|
|
$sellpage = htmlspecialchars($arr['sellpage'],ENT_COMPAT,'UTF-8',false);
|
|
$site_location = htmlspecialchars($arr['location'],ENT_COMPAT,'UTF-8',false);
|
|
$site_realm = htmlspecialchars($arr['realm'],ENT_COMPAT,'UTF-8',false);
|
|
$site_project = htmlspecialchars($arr['project'],ENT_COMPAT,'UTF-8',false);
|
|
$site_crypto = ((array_key_exists('encryption',$arr) && is_array($arr['encryption'])) ? htmlspecialchars(implode(',',$arr['encryption']),ENT_COMPAT,'UTF-8',false) : '');
|
|
$site_version = ((array_key_exists('version',$arr)) ? htmlspecialchars($arr['version'],ENT_COMPAT,'UTF-8',false) : '');
|
|
|
|
// You can have one and only one primary directory per realm.
|
|
// Downgrade any others claiming to be primary. As they have
|
|
// flubbed up this badly already, don't let them be directory servers at all.
|
|
|
|
if (($site_directory === DIRECTORY_MODE_PRIMARY)
|
|
&& ($site_realm === get_directory_realm())
|
|
&& ($arr['url'] != get_directory_primary())) {
|
|
$site_directory = DIRECTORY_MODE_NORMAL;
|
|
}
|
|
|
|
$site_flags = $site_directory;
|
|
|
|
if (array_key_exists('zot',$arr)) {
|
|
set_sconfig($arr['url'],'system','zot_version',$arr['zot']);
|
|
}
|
|
|
|
if ($exists) {
|
|
if (($siterecord['site_flags'] != $site_flags)
|
|
|| ($siterecord['site_access'] != $access_policy)
|
|
|| ($siterecord['site_directory'] != $directory_url)
|
|
|| ($siterecord['site_sellpage'] != $sellpage)
|
|
|| ($siterecord['site_location'] != $site_location)
|
|
|| ($siterecord['site_register'] != $register_policy)
|
|
|| ($siterecord['site_project'] != $site_project)
|
|
|| ($siterecord['site_realm'] != $site_realm)
|
|
|| ($siterecord['site_crypto'] != $site_crypto)
|
|
|| ($siterecord['site_version'] != $site_version) ) {
|
|
|
|
$update = true;
|
|
|
|
// logger('import_site: input: ' . print_r($arr,true));
|
|
// logger('import_site: stored: ' . print_r($siterecord,true));
|
|
|
|
$r = q("update site set site_dead = 0, site_location = '%s', site_flags = %d, site_access = %d, site_directory = '%s', site_register = %d, site_update = '%s', site_sellpage = '%s', site_realm = '%s', site_type = %d, site_project = '%s', site_version = '%s', site_crypto = '%s'
|
|
where site_url = '%s'",
|
|
dbesc($site_location),
|
|
intval($site_flags),
|
|
intval($access_policy),
|
|
dbesc($directory_url),
|
|
intval($register_policy),
|
|
dbesc(datetime_convert()),
|
|
dbesc($sellpage),
|
|
dbesc($site_realm),
|
|
intval(SITE_TYPE_ZOT),
|
|
dbesc($site_project),
|
|
dbesc($site_version),
|
|
dbesc($site_crypto),
|
|
dbesc($url)
|
|
);
|
|
if (! $r) {
|
|
logger('Update failed. ' . print_r($arr,true));
|
|
}
|
|
}
|
|
else {
|
|
// update the timestamp to indicate we communicated with this site
|
|
q("update site set site_dead = 0, site_update = '%s' where site_url = '%s'",
|
|
dbesc(datetime_convert()),
|
|
dbesc($url)
|
|
);
|
|
}
|
|
}
|
|
else {
|
|
$update = true;
|
|
|
|
$r = site_store_lowlevel(
|
|
[
|
|
'site_location' => $site_location,
|
|
'site_url' => $url,
|
|
'site_access' => intval($access_policy),
|
|
'site_flags' => intval($site_flags),
|
|
'site_update' => datetime_convert(),
|
|
'site_directory' => $directory_url,
|
|
'site_register' => intval($register_policy),
|
|
'site_sellpage' => $sellpage,
|
|
'site_realm' => $site_realm,
|
|
'site_type' => intval(SITE_TYPE_ZOT),
|
|
'site_project' => $site_project,
|
|
'site_version' => $site_version,
|
|
'site_crypto' => $site_crypto
|
|
]
|
|
);
|
|
|
|
if (! $r) {
|
|
logger('Record create failed. ' . print_r($arr,true));
|
|
}
|
|
}
|
|
|
|
return $update;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns path to /rpost
|
|
*
|
|
* @todo We probably should make rpost discoverable.
|
|
*
|
|
* @param array $observer
|
|
* * \e string \b xchan_url
|
|
* @return string
|
|
*/
|
|
static function get_rpost_path($observer) {
|
|
if (! $observer) {
|
|
return EMPTY_STR;
|
|
}
|
|
|
|
$parsed = parse_url($observer['xchan_url']);
|
|
|
|
return $parsed['scheme'] . '://' . $parsed['host'] . (($parsed['port']) ? ':' . $parsed['port'] : '') . '/rpost?f=';
|
|
}
|
|
|
|
/**
|
|
* @brief
|
|
*
|
|
* @param array $x
|
|
* @return boolean|string return false or a hash
|
|
*/
|
|
|
|
static function import_author_zot($x) {
|
|
|
|
// Check that we have both a hubloc and xchan record - as occasionally storage calls will fail and
|
|
// we may only end up with one; which results in posts with no author name or photo and are a bit
|
|
// of a hassle to repair. If either or both are missing, do a full discovery probe.
|
|
|
|
if (! array_key_exists('id',$x)) {
|
|
return import_author_activitypub($x);
|
|
}
|
|
|
|
$hash = self::make_xchan_hash($x['id'],$x['key']);
|
|
|
|
$desturl = $x['url'];
|
|
|
|
$r1 = q("select hubloc_url, hubloc_updated, site_dead from hubloc left join site on
|
|
hubloc_url = site_url where hubloc_guid = '%s' and hubloc_guid_sig = '%s' and hubloc_primary = 1 limit 1",
|
|
dbesc($x['id']),
|
|
dbesc($x['id_sig'])
|
|
);
|
|
|
|
$r2 = q("select xchan_hash from xchan where xchan_guid = '%s' and xchan_guid_sig = '%s' limit 1",
|
|
dbesc($x['id']),
|
|
dbesc($x['id_sig'])
|
|
);
|
|
|
|
$site_dead = false;
|
|
|
|
if ($r1 && intval($r1[0]['site_dead'])) {
|
|
$site_dead = true;
|
|
}
|
|
|
|
// We have valid and somewhat fresh information. Always true if it is our own site.
|
|
|
|
if ($r1 && $r2 && ( $r1[0]['hubloc_updated'] > datetime_convert('UTC','UTC','now - 1 week') || $r1[0]['hubloc_url'] === z_root() ) ) {
|
|
logger('in cache', LOGGER_DEBUG);
|
|
return $hash;
|
|
}
|
|
|
|
logger('not in cache or cache stale - probing: ' . print_r($x,true), LOGGER_DEBUG,LOG_INFO);
|
|
|
|
// The primary hub may be dead. Try to find another one associated with this identity that is
|
|
// still alive. If we find one, use that url for the discovery/refresh probe. Otherwise, the dead site
|
|
// is all we have and there is no point probing it. Just return the hash indicating we have a
|
|
// cached entry and the identity is valid. It's just unreachable until they bring back their
|
|
// server from the grave or create another clone elsewhere.
|
|
|
|
if ($site_dead) {
|
|
logger('dead site - ignoring', LOGGER_DEBUG,LOG_INFO);
|
|
|
|
$r = q("select hubloc_id_url from hubloc left join site on hubloc_url = site_url
|
|
where hubloc_hash = '%s' and site_dead = 0",
|
|
dbesc($hash)
|
|
);
|
|
if ($r) {
|
|
logger('found another site that is not dead: ' . $r[0]['hubloc_url'], LOGGER_DEBUG,LOG_INFO);
|
|
$desturl = $r[0]['hubloc_url'];
|
|
}
|
|
else {
|
|
return $hash;
|
|
}
|
|
}
|
|
|
|
$them = [ 'hubloc_id_url' => $desturl ];
|
|
if (self::refresh($them)) {
|
|
return $hash;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static function zotinfo($arr) {
|
|
|
|
$ret = [];
|
|
|
|
$zhash = ((x($arr,'guid_hash')) ? $arr['guid_hash'] : '');
|
|
$zguid = ((x($arr,'guid')) ? $arr['guid'] : '');
|
|
$zguid_sig = ((x($arr,'guid_sig')) ? $arr['guid_sig'] : '');
|
|
$zaddr = ((x($arr,'address')) ? $arr['address'] : '');
|
|
$ztarget = ((x($arr,'target_url')) ? $arr['target_url'] : '');
|
|
$zsig = ((x($arr,'target_sig')) ? $arr['target_sig'] : '');
|
|
$zkey = ((x($arr,'key')) ? $arr['key'] : '');
|
|
$mindate = ((x($arr,'mindate')) ? $arr['mindate'] : '');
|
|
$token = ((x($arr,'token')) ? $arr['token'] : '');
|
|
$feed = ((x($arr,'feed')) ? intval($arr['feed']) : 0);
|
|
|
|
if ($ztarget) {
|
|
$t = q("select * from hubloc where hubloc_id_url = '%s' and hubloc_network = 'zot6' limit 1",
|
|
dbesc($ztarget)
|
|
);
|
|
if ($t) {
|
|
$ztarget_hash = $t[0]['hubloc_hash'];
|
|
}
|
|
else {
|
|
|
|
// should probably perform discovery of the requestor (target) but if they actually had
|
|
// permissions we would know about them and we only want to know who they are to
|
|
// enumerate their specific permissions
|
|
|
|
$ztarget_hash = EMPTY_STR;
|
|
}
|
|
}
|
|
|
|
$r = null;
|
|
|
|
if (strlen($zhash)) {
|
|
$r = q("select channel.*, xchan.* from channel left join xchan on channel_hash = xchan_hash
|
|
where channel_hash = '%s' limit 1",
|
|
dbesc($zhash)
|
|
);
|
|
}
|
|
elseif (strlen($zguid) && strlen($zguid_sig)) {
|
|
$r = q("select channel.*, xchan.* from channel left join xchan on channel_hash = xchan_hash
|
|
where channel_guid = '%s' and channel_guid_sig = '%s' limit 1",
|
|
dbesc($zguid),
|
|
dbesc($zguid_sig)
|
|
);
|
|
}
|
|
elseif (strlen($zaddr)) {
|
|
if (strpos($zaddr,'[system]') === false) { /* normal address lookup */
|
|
$r = q("select channel.*, xchan.* from channel left join xchan on channel_hash = xchan_hash
|
|
where ( channel_address = '%s' or xchan_addr = '%s' ) limit 1",
|
|
dbesc($zaddr),
|
|
dbesc($zaddr)
|
|
);
|
|
}
|
|
else {
|
|
|
|
/**
|
|
* The special address '[system]' will return a system channel if one has been defined,
|
|
* Or the first valid channel we find if there are no system channels.
|
|
*
|
|
* This is used by magic-auth if we have no prior communications with this site - and
|
|
* returns an identity on this site which we can use to create a valid hub record so that
|
|
* we can exchange signed messages. The precise identity is irrelevant. It's the hub
|
|
* information that we really need at the other end - and this will return it.
|
|
*
|
|
*/
|
|
|
|
$r = q("select channel.*, xchan.* from channel left join xchan on channel_hash = xchan_hash
|
|
where channel_system = 1 order by channel_id limit 1");
|
|
if (! $r) {
|
|
$r = q("select channel.*, xchan.* from channel left join xchan on channel_hash = xchan_hash
|
|
where channel_removed = 0 order by channel_id limit 1");
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
$ret['message'] = 'Invalid request';
|
|
return($ret);
|
|
}
|
|
|
|
if (! $r) {
|
|
$ret['message'] = 'Item not found.';
|
|
return($ret);
|
|
}
|
|
|
|
$e = $r[0];
|
|
|
|
$id = $e['channel_id'];
|
|
|
|
$sys_channel = (intval($e['channel_system']) ? true : false);
|
|
$special_channel = (($e['channel_pageflags'] & PAGE_PREMIUM) ? true : false);
|
|
$adult_channel = (($e['channel_pageflags'] & PAGE_ADULT) ? true : false);
|
|
$censored = (($e['channel_pageflags'] & PAGE_CENSORED) ? true : false);
|
|
$searchable = (($e['channel_pageflags'] & PAGE_HIDDEN) ? false : true);
|
|
$deleted = (intval($e['xchan_deleted']) ? true : false);
|
|
|
|
if ($deleted || $censored || $sys_channel) {
|
|
$searchable = false;
|
|
}
|
|
|
|
// now all forums (public, restricted, and private) set the public_forum flag. So it really means "is a group"
|
|
// and has nothing to do with accessibility.
|
|
|
|
$role = get_pconfig($e['channel_id'],'system','permissions_role');
|
|
$rolesettings = PermissionRoles::role_perms($role);
|
|
|
|
$channel_type = isset($rolesettings['channel_type']) ? $rolesettings['channel_type'] : 'normal';
|
|
|
|
// This is for birthdays and keywords, but must check access permissions
|
|
$p = q("select * from profile where uid = %d and is_default = 1",
|
|
intval($e['channel_id'])
|
|
);
|
|
|
|
$profile = array();
|
|
|
|
if ($p) {
|
|
|
|
if (! intval($p[0]['publish']))
|
|
$searchable = false;
|
|
|
|
$profile['description'] = $p[0]['pdesc'];
|
|
$profile['birthday'] = $p[0]['dob'];
|
|
if (($profile['birthday'] != '0000-00-00') && (($bd = z_birthday($p[0]['dob'],$e['channel_timezone'])) !== '')) {
|
|
$profile['next_birthday'] = $bd;
|
|
}
|
|
|
|
if ($age = age($p[0]['dob'],$e['channel_timezone'],'')) {
|
|
$profile['age'] = $age;
|
|
}
|
|
$profile['gender'] = $p[0]['gender'];
|
|
$profile['marital'] = $p[0]['marital'];
|
|
$profile['sexual'] = $p[0]['sexual'];
|
|
$profile['locale'] = $p[0]['locality'];
|
|
$profile['region'] = $p[0]['region'];
|
|
$profile['postcode'] = $p[0]['postal_code'];
|
|
$profile['country'] = $p[0]['country_name'];
|
|
$profile['about'] = $p[0]['about'];
|
|
$profile['homepage'] = $p[0]['homepage'];
|
|
$profile['hometown'] = $p[0]['hometown'];
|
|
|
|
if ($p[0]['keywords']) {
|
|
$tags = array();
|
|
$k = explode(' ',$p[0]['keywords']);
|
|
if ($k) {
|
|
foreach ($k as $kk) {
|
|
if (trim($kk," \t\n\r\0\x0B,")) {
|
|
$tags[] = trim($kk," \t\n\r\0\x0B,");
|
|
}
|
|
}
|
|
}
|
|
if ($tags) {
|
|
$profile['keywords'] = $tags;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Communication details
|
|
|
|
$ret['id'] = $e['xchan_guid'];
|
|
$ret['id_sig'] = self::sign($e['xchan_guid'], $e['channel_prvkey']);
|
|
|
|
$ret['primary_location'] = [
|
|
'address' => $e['xchan_addr'],
|
|
'url' => $e['xchan_url'],
|
|
'connections_url' => $e['xchan_connurl'],
|
|
'follow_url' => $e['xchan_follow'],
|
|
];
|
|
|
|
$ret['public_key'] = $e['xchan_pubkey'];
|
|
$ret['username'] = $e['channel_address'];
|
|
$ret['name'] = $e['xchan_name'];
|
|
$ret['name_updated'] = $e['xchan_name_date'];
|
|
$ret['photo'] = [
|
|
'url' => $e['xchan_photo_l'],
|
|
'type' => $e['xchan_photo_mimetype'],
|
|
'updated' => $e['xchan_photo_date']
|
|
];
|
|
|
|
$ret['channel_role'] = get_pconfig($e['channel_id'],'system','permissions_role','custom');
|
|
$ret['channel_type'] = $channel_type;
|
|
$ret['protocols'] = [ 'zot6' ];
|
|
$ret['searchable'] = $searchable;
|
|
$ret['adult_content'] = $adult_channel;
|
|
|
|
$ret['comments'] = map_scope(PermissionLimits::Get($e['channel_id'],'post_comments'));
|
|
|
|
if ($deleted) {
|
|
$ret['deleted'] = $deleted;
|
|
}
|
|
|
|
if (intval($e['channel_removed'])) {
|
|
$ret['deleted_locally'] = true;
|
|
}
|
|
|
|
// premium or other channel desiring some contact with potential followers before connecting.
|
|
// This is a template - %s will be replaced with the follow_url we discover for the return channel.
|
|
|
|
if ($special_channel) {
|
|
$ret['connect_url'] = (($e['xchan_connpage']) ? $e['xchan_connpage'] : z_root() . '/connect/' . $e['channel_address']);
|
|
}
|
|
|
|
// This is a template for our follow url, %s will be replaced with a webbie
|
|
if (! $ret['follow_url']) {
|
|
$ret['follow_url'] = z_root() . '/follow?f=&url=%s';
|
|
}
|
|
|
|
$permissions = get_all_perms($e['channel_id'],$ztarget_hash,false);
|
|
|
|
if ($ztarget_hash) {
|
|
$permissions['connected'] = false;
|
|
$b = q("select * from abook where abook_xchan = '%s' and abook_channel = %d limit 1",
|
|
dbesc($ztarget_hash),
|
|
intval($e['channel_id'])
|
|
);
|
|
if ($b) {
|
|
$permissions['connected'] = true;
|
|
}
|
|
}
|
|
|
|
if ($permissions['view_profile']) {
|
|
$ret['profile'] = $profile;
|
|
}
|
|
|
|
|
|
$concise_perms = [];
|
|
if ($permissions) {
|
|
foreach ($permissions as $k => $v) {
|
|
if ($v) {
|
|
$concise_perms[] = $k;
|
|
}
|
|
}
|
|
$permissions = implode(',',$concise_perms);
|
|
}
|
|
|
|
$ret['permissions'] = $permissions;
|
|
$ret['permissions_for'] = $ztarget;
|
|
|
|
|
|
// array of (verified) hubs this channel uses
|
|
|
|
$x = self::encode_locations($e);
|
|
if ($x) {
|
|
$ret['locations'] = $x;
|
|
}
|
|
$ret['site'] = self::site_info();
|
|
|
|
call_hooks('zotinfo',$ret);
|
|
|
|
return($ret);
|
|
|
|
}
|
|
|
|
|
|
static function site_info() {
|
|
|
|
$signing_key = get_config('system','prvkey');
|
|
$sig_method = get_config('system','signature_algorithm','sha256');
|
|
|
|
$ret = [];
|
|
$ret['site'] = [];
|
|
$ret['site']['url'] = z_root();
|
|
$ret['site']['site_sig'] = self::sign(z_root(), $signing_key);
|
|
$ret['site']['post'] = z_root() . '/zot';
|
|
$ret['site']['openWebAuth'] = z_root() . '/owa';
|
|
$ret['site']['authRedirect'] = z_root() . '/magic';
|
|
$ret['site']['sitekey'] = get_config('system','pubkey');
|
|
|
|
$dirmode = get_config('system','directory_mode');
|
|
if (($dirmode === false) || ($dirmode == DIRECTORY_MODE_NORMAL)) {
|
|
$ret['site']['directory_mode'] = 'normal';
|
|
}
|
|
|
|
if ($dirmode == DIRECTORY_MODE_PRIMARY) {
|
|
$ret['site']['directory_mode'] = 'primary';
|
|
}
|
|
elseif ($dirmode == DIRECTORY_MODE_SECONDARY) {
|
|
$ret['site']['directory_mode'] = 'secondary';
|
|
}
|
|
elseif ($dirmode == DIRECTORY_MODE_STANDALONE) {
|
|
$ret['site']['directory_mode'] = 'standalone';
|
|
}
|
|
if ($dirmode != DIRECTORY_MODE_NORMAL) {
|
|
$ret['site']['directory_url'] = z_root() . '/dirsearch';
|
|
}
|
|
|
|
|
|
$ret['site']['encryption'] = Crypto::methods();
|
|
$ret['site']['zot'] = System::get_zot_revision();
|
|
|
|
// hide detailed site information if you're off the grid
|
|
|
|
if ($dirmode != DIRECTORY_MODE_STANDALONE) {
|
|
|
|
$register_policy = intval(get_config('system','register_policy'));
|
|
|
|
if ($register_policy == REGISTER_CLOSED) {
|
|
$ret['site']['register_policy'] = 'closed';
|
|
}
|
|
if ($register_policy == REGISTER_APPROVE) {
|
|
$ret['site']['register_policy'] = 'approve';
|
|
}
|
|
if ($register_policy == REGISTER_OPEN) {
|
|
$ret['site']['register_policy'] = 'open';
|
|
}
|
|
|
|
$access_policy = intval(get_config('system','access_policy'));
|
|
|
|
if ($access_policy == ACCESS_PRIVATE) {
|
|
$ret['site']['access_policy'] = 'private';
|
|
}
|
|
if ($access_policy == ACCESS_PAID) {
|
|
$ret['site']['access_policy'] = 'paid';
|
|
}
|
|
if ($access_policy == ACCESS_FREE) {
|
|
$ret['site']['access_policy'] = 'free';
|
|
}
|
|
if ($access_policy == ACCESS_TIERED) {
|
|
$ret['site']['access_policy'] = 'tiered';
|
|
}
|
|
|
|
$ret['site']['accounts'] = account_total();
|
|
|
|
$ret['site']['channels'] = channel_total();
|
|
|
|
$ret['site']['admin'] = get_config('system','admin_email');
|
|
|
|
$visible_plugins = [];
|
|
if (is_array(App::$plugins) && count(App::$plugins)) {
|
|
$r = q("select * from addon where hidden = 0");
|
|
if ($r) {
|
|
foreach ($r as $rr) {
|
|
$visible_plugins[] = $rr['aname'];
|
|
}
|
|
}
|
|
}
|
|
|
|
$ret['site']['plugins'] = $visible_plugins;
|
|
$ret['site']['sitehash'] = get_config('system','location_hash');
|
|
$ret['site']['sitename'] = get_config('system','sitename');
|
|
$ret['site']['sellpage'] = get_config('system','sellpage');
|
|
$ret['site']['location'] = get_config('system','site_location');
|
|
$ret['site']['realm'] = get_directory_realm();
|
|
$ret['site']['project'] = System::get_platform_name();
|
|
$ret['site']['version'] = System::get_project_version();
|
|
|
|
}
|
|
|
|
return $ret['site'];
|
|
|
|
}
|
|
|
|
/**
|
|
* @brief
|
|
*
|
|
* @param array $hub
|
|
* @param string $sitekey (optional, default empty)
|
|
*
|
|
* @return string hubloc_url
|
|
*/
|
|
|
|
static function update_hub_connected($hub, $site_id = '') {
|
|
|
|
if ($site_id) {
|
|
|
|
/*
|
|
* This hub has now been proven to be valid.
|
|
* Any hub with the same URL and a different sitekey cannot be valid.
|
|
* Get rid of them (mark them deleted). There's a good chance they were re-installs.
|
|
*/
|
|
|
|
q("update hubloc set hubloc_deleted = 1, hubloc_error = 1 where hubloc_hash = '%s' and hubloc_url = '%s' and hubloc_site_id != '%s' ",
|
|
dbesc($hub['hubloc_hash']),
|
|
dbesc($hub['hubloc_url']),
|
|
dbesc($site_id)
|
|
);
|
|
|
|
}
|
|
else {
|
|
$site_id = $hub['hubloc_site_id'];
|
|
}
|
|
|
|
// $sender['sitekey'] is a new addition to the protocol to distinguish
|
|
// hublocs coming from re-installed sites. Older sites will not provide
|
|
// this field and we have to still mark them valid, since we can't tell
|
|
// if this hubloc has the same sitekey as the packet we received.
|
|
// Update our DB to show when we last communicated successfully with this hub
|
|
// This will allow us to prune dead hubs from using up resources
|
|
|
|
$t = datetime_convert('UTC', 'UTC', 'now - 15 minutes');
|
|
|
|
$r = q("update hubloc set hubloc_connected = '%s' where hubloc_id = %d and hubloc_site_id = '%s' and hubloc_connected < '%s' ",
|
|
dbesc(datetime_convert()),
|
|
intval($hub['hubloc_id']),
|
|
dbesc($site_id),
|
|
dbesc($t)
|
|
);
|
|
|
|
// a dead hub came back to life - reset any tombstones we might have
|
|
|
|
if (intval($hub['hubloc_error']) || intval($hub['hubloc_deleted'])) {
|
|
q("update hubloc set hubloc_error = 0, hubloc_deleted = 0 where hubloc_id = %d and hubloc_site_id = '%s' ",
|
|
intval($hub['hubloc_id']),
|
|
dbesc($site_id)
|
|
);
|
|
if (intval($hub['hubloc_orphancheck'])) {
|
|
q("update hubloc set hubloc_orphancheck = 0 where hubloc_id = %d and hubloc_site_id = '%s' ",
|
|
intval($hub['hubloc_id']),
|
|
dbesc($site_id)
|
|
);
|
|
}
|
|
q("update xchan set xchan_orphan = 0 where xchan_orphan = 1 and xchan_hash = '%s'",
|
|
dbesc($hub['hubloc_hash'])
|
|
);
|
|
}
|
|
|
|
return $hub['hubloc_url'];
|
|
}
|
|
|
|
|
|
static function sign($data,$key,$alg = 'sha256') {
|
|
if (! $key) {
|
|
return 'no key';
|
|
}
|
|
$sig = '';
|
|
openssl_sign($data,$sig,$key,$alg);
|
|
return $alg . '.' . base64url_encode($sig);
|
|
}
|
|
|
|
static function verify($data,$sig,$key) {
|
|
|
|
$verify = 0;
|
|
|
|
$x = explode('.',$sig,2);
|
|
|
|
if ($key && count($x) === 2) {
|
|
$alg = $x[0];
|
|
$signature = base64url_decode($x[1]);
|
|
|
|
$verify = @openssl_verify($data,$signature,$key,$alg);
|
|
|
|
if ($verify === (-1)) {
|
|
while ($msg = openssl_error_string()) {
|
|
logger('openssl_verify: ' . $msg,LOGGER_NORMAL,LOG_ERR);
|
|
}
|
|
btlogger('openssl_verify: key: ' . $key, LOGGER_DEBUG, LOG_ERR);
|
|
}
|
|
}
|
|
return(($verify > 0) ? true : false);
|
|
}
|
|
|
|
|
|
|
|
static function is_zot_request() {
|
|
|
|
$x = getBestSupportedMimeType([ 'application/x-zot+json' ]);
|
|
return(($x) ? true : false);
|
|
}
|
|
|
|
|
|
static public function zot_record_preferred($arr, $check = 'hubloc_network') {
|
|
|
|
if (! $arr) {
|
|
return $arr;
|
|
}
|
|
|
|
foreach ($arr as $v) {
|
|
if($v[$check] === 'zot6') {
|
|
return $v;
|
|
}
|
|
}
|
|
return $arr[0];
|
|
}
|
|
|
|
}
|