<?php
namespace Zotlabs\Zot6;
use Zotlabs\Lib\Libzot;
use Zotlabs\Lib\Queue;
class Zot6Handler implements IHandler {
function Notify($data,$hub) {
return self::reply_notify($data,$hub);
}
function Request($data,$hub) {
return self::reply_message_request($data,$hub);
}
function Rekey($sender,$data,$hub) {
return self::reply_rekey_request($sender,$data,$hub);
}
function Refresh($sender,$recipients,$hub) {
return self::reply_refresh($sender,$recipients,$hub);
}
function Purge($sender,$recipients,$hub) {
return self::reply_purge($sender,$recipients,$hub);
}
// Implementation of specific methods follows;
// These generally do a small amout of validation and call Libzot
// to do any heavy lifting
static function reply_notify($data,$hub) {
$ret = [ 'success' => false ];
logger('notify received from ' . $hub['hubloc_url']);
$x = Libzot::fetch($data);
$ret['delivery_report'] = $x;
$ret['success'] = true;
return $ret;
}
/**
* @brief Remote channel info (such as permissions or photo or something)
* has been updated. Grab a fresh copy and sync it.
*
* The difference between refresh and force_refresh is that force_refresh
* unconditionally creates a directory update record, even if no changes were
* detected upon processing.
*
* @param array $sender
* @param array $recipients
*
* @return json_return_and_die()
*/
static function reply_refresh($sender, $recipients,$hub) {
$ret = array('success' => false);
if($recipients) {
// This would be a permissions update, typically for one connection
foreach ($recipients as $recip) {
$r = q("select channel.*,xchan.* from channel
left join xchan on channel_hash = xchan_hash
where xchan_hash ='%s' limit 1",
dbesc($recip)
);
$x = Libzot::refresh( [ 'hubloc_id_url' => $hub['hubloc_id_url'] ], $r[0], (($msgtype === 'force_refresh') ? true : false));
}
}
else {
// system wide refresh
$x = Libzot::refresh( [ 'hubloc_id_url' => $hub['hubloc_id_url'] ], null, (($msgtype === 'force_refresh') ? true : false));
}
$ret['success'] = true;
return $ret;
}
/**
* @brief Process a message request.
*
* If a site receives a comment to a post but finds they have no parent to attach it with, they
* may send a 'request' packet containing the message_id of the missing parent. This is the handler
* for that packet. We will create a message_list array of the entire conversation starting with
* the missing parent and invoke delivery to the sender of the packet.
*
* Zotlabs/Daemon/Deliver.php (for local delivery) and
* mod/post.php???? @fixme (for web delivery) detect the existence of
* this 'message_list' at the destination and split it into individual messages which are
* processed/delivered in order.
*
*
* @param array $data
* @return array
*/
static function reply_message_request($data,$hub) {
$ret = [ 'success' => false ];
$message_id = EMPTY_STR;
if(array_key_exists('data',$data))
$ptr = $data['data'];
if(is_array($ptr) && array_key_exists(0,$ptr)) {
$ptr = $ptr[0];
}
if(is_string($ptr)) {
$message_id = $ptr;
}
if(is_array($ptr) && array_key_exists('id',$ptr)) {
$message_id = $ptr['id'];
}
if (! $message_id) {
$ret['message'] = 'no message_id';
logger('no message_id');
return $ret;
}
$sender = $hub['hubloc_hash'];
/*
* Find the local channel in charge of this post (the first and only recipient of the request packet)
*/
$arr = $data['recipients'][0];
$c = q("select * from channel left join xchan on channel_hash = xchan_hash where channel_hash = '%s' limit 1",
dbesc($arr['portable_id'])
);
if (! $c) {
logger('recipient channel not found.');
$ret['message'] .= 'recipient not found.' . EOL;
return $ret;
}
/*
* fetch the requested conversation
*/
$messages = zot_feed($c[0]['channel_id'],$sender_hash, [ 'message_id' => $data['message_id'], 'encoding' => 'activitystreams' ]);
return (($messages) ? : [] );
}
static function rekey_request($sender,$data,$hub) {
$ret = array('success' => false);
// newsig is newkey signed with oldkey
// The original xchan will remain. In Zot/Receiver we will have imported the new xchan and hubloc to verify
// the packet authenticity. What we will do now is verify that the keychange operation was signed by the
// oldkey, and if so change all the abook, abconfig, group, and permission elements which reference the
// old xchan_hash.
if((! $data['old_key']) && (! $data['new_key']) && (! $data['new_sig']))
return $ret;
$old = null;
if(Libzot::verify($data['old_guid'],$data['old_guid_sig'],$data['old_key'])) {
$oldhash = make_xchan_hash($data['old_guid'],$data['old_key']);
$old = q("select * from xchan where xchan_hash = '%s' limit 1",
dbesc($oldhash)
);
}
else
return $ret;
if(! $old) {
return $ret;
}
$xchan = $old[0];
if(! Libzot::verify($data['new_key'],$data['new_sig'],$xchan['xchan_pubkey'])) {
return $ret;
}
$r = q("select * from xchan where xchan_hash = '%s' limit 1",
dbesc($sender)
);
$newxchan = $r[0];
// @todo
// if ! $update create a linked identity
xchan_change_key($xchan,$newxchan,$data);
$ret['success'] = true;
return $ret;
}
/**
* @brief
*
* @param array $sender
* @param array $recipients
*
* return json_return_and_die()
*/
static function reply_purge($sender, $recipients, $hub) {
$ret = array('success' => false);
if ($recipients) {
// basically this means "unfriend"
foreach ($recipients as $recip) {
$r = q("select channel.*,xchan.* from channel
left join xchan on channel_hash = xchan_hash
where channel_hash = '%s' and channel_guid_sig = '%s' limit 1",
dbesc($recip)
);
if ($r) {
$r = q("select abook_id from abook where uid = %d and abook_xchan = '%s' limit 1",
intval($r[0]['channel_id']),
dbesc($sender)
);
if ($r) {
contact_remove($r[0]['channel_id'],$r[0]['abook_id']);
}
}
}
$ret['success'] = true;
}
else {
// Unfriend everybody - basically this means the channel has committed suicide
remove_all_xchan_resources($sender);
$ret['success'] = true;
}
return $ret;
}
}
