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streams/Zotlabs/Daemon/Notifier.php

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<?php /** @file */
namespace Zotlabs\Daemon;
require_once('include/queue_fn.php');
require_once('include/html2plain.php');
require_once('include/conversation.php');
/*
* This file was at one time responsible for doing all deliveries, but this caused
* big problems on shared hosting systems, where the process might get killed by the
* hosting provider and nothing would get delivered.
* It now only delivers one message under certain cases, and invokes a queued
* delivery mechanism (include/deliver.php) to deliver individual contacts at
* controlled intervals.
* This has a much better chance of surviving random processes getting killed
* by the hosting provider.
*
* The basic flow is:
* Identify the type of message
* Collect any information that needs to be sent
* Convert it into a suitable generic format for sending
* Figure out who the recipients are and if we need to relay
* through a conversation owner
* Once we know what recipients are involved, collect a list of
* destination sites
* Build and store a queue item for each unique site and invoke
* a delivery process for each site or a small number of sites (1-3)
* and add a slight delay between each delivery invocation if desired (usually)
*
*/
/*
* The notifier is typically called with:
*
* Zotlabs\Daemon\Master::Summon(array('Notifier', COMMAND, ITEM_ID));
*
* where COMMAND is one of the following:
*
* activity (in diaspora.php, dfrn_confirm.php, profiles.php)
* comment-import (in diaspora.php, items.php)
* comment-new (in item.php)
* drop (in diaspora.php, items.php, photos.php)
* edit_post (in item.php)
* event (in events.php)
* expire (in items.php)
* like (in like.php, poke.php)
* mail (in message.php)
* tag (in photos.php, poke.php, tagger.php)
* tgroup (in items.php)
* wall-new (in photos.php, item.php)
*
* and ITEM_ID is the id of the item in the database that needs to be sent to others.
*
* ZOT
* permission_create abook_id
* permission_update abook_id
* refresh_all channel_id
* purge_all channel_id
* expire channel_id
* relay item_id (item was relayed to owner, we will deliver it as owner)
* single_activity item_id (deliver to a singleton network from the appropriate clone)
* single_mail mail_id (deliver to a singleton network from the appropriate clone)
* location channel_id
* request channel_id xchan_hash message_id
* rating xlink_id
*
*/
require_once('include/zot.php');
require_once('include/queue_fn.php');
require_once('include/datetime.php');
require_once('include/items.php');
require_once('include/bbcode.php');
require_once('include/channel.php');
class Notifier {
static public function run($argc,$argv){
if($argc < 3)
return;
logger('notifier: invoked: ' . print_r($argv,true), LOGGER_DEBUG);
$cmd = $argv[1];
$item_id = $argv[2];
$extra = (($argc > 3) ? $argv[3] : null);
if(! $item_id)
return;
$sys = get_sys_channel();
$deliveries = array();
$dead_hubs = array();
$dh = q("select site_url from site where site_dead = 1");
if($dh) {
foreach($dh as $dead) {
$dead_hubs[] = $dead['site_url'];
}
}
$request = false;
$mail = false;
$top_level = false;
$location = false;
$recipients = array();
$url_recipients = array();
$normal_mode = true;
$packet_type = 'undefined';
if($cmd === 'mail' || $cmd === 'single_mail') {
$normal_mode = false;
$mail = true;
$private = true;
$message = q("SELECT * FROM mail WHERE id = %d LIMIT 1",
intval($item_id)
);
if(! $message) {
return;
}
xchan_mail_query($message[0]);
$uid = $message[0]['channel_id'];
$recipients[] = $message[0]['from_xchan']; // include clones
$recipients[] = $message[0]['to_xchan'];
$item = $message[0];
$encoded_item = encode_mail($item);
$s = q("select * from channel where channel_id = %d limit 1",
intval($item['channel_id'])
);
if($s)
$channel = $s[0];
}
elseif($cmd === 'request') {
$channel_id = $item_id;
$xchan = $argv[3];
$request_message_id = $argv[4];
$s = q("select * from channel where channel_id = %d limit 1",
intval($channel_id)
);
if($s)
$channel = $s[0];
$private = true;
$recipients[] = $xchan;
$packet_type = 'request';
$normal_mode = false;
}
elseif($cmd == 'permission_update' || $cmd == 'permission_create') {
// Get the (single) recipient
$r = q("select * from abook left join xchan on abook_xchan = xchan_hash where abook_id = %d and abook_self = 0",
intval($item_id)
);
if($r) {
$uid = $r[0]['abook_channel'];
// Get the sender
$channel = channelx_by_n($uid);
if($channel) {
$perm_update = array('sender' => $channel, 'recipient' => $r[0], 'success' => false, 'deliveries' => '');
if($cmd == 'permission_create')
call_hooks('permissions_create',$perm_update);
else
call_hooks('permissions_update',$perm_update);
if($perm_update['success']) {
if($perm_update['deliveries']) {
$deliveries[] = $perm_update['deliveries'];
do_delivery($deliveries);
}
return;
}
else {
$recipients[] = $r[0]['abook_xchan'];
$private = false;
$packet_type = 'refresh';
$packet_recips = array(array('guid' => $r[0]['xchan_guid'],'guid_sig' => $r[0]['xchan_guid_sig'],'hash' => $r[0]['xchan_hash']));
}
}
}
}
elseif($cmd === 'refresh_all') {
logger('notifier: refresh_all: ' . $item_id);
$uid = $item_id;
$channel = channelx_by_n($item_id);
$r = q("select abook_xchan from abook where abook_channel = %d",
intval($item_id)
);
if($r) {
foreach($r as $rr) {
$recipients[] = $rr['abook_xchan'];
}
}
$private = false;
$packet_type = 'refresh';
}
elseif($cmd === 'location') {
logger('notifier: location: ' . $item_id);
$s = q("select * from channel where channel_id = %d limit 1",
intval($item_id)
);
if($s)
$channel = $s[0];
$uid = $item_id;
$recipients = array();
$r = q("select abook_xchan from abook where abook_channel = %d",
intval($item_id)
);
if($r) {
foreach($r as $rr) {
$recipients[] = $rr['abook_xchan'];
}
}
$encoded_item = array('locations' => zot_encode_locations($channel),'type' => 'location', 'encoding' => 'zot');
$target_item = array('aid' => $channel['channel_account_id'],'uid' => $channel['channel_id']);
$private = false;
$packet_type = 'location';
$location = true;
}
elseif($cmd === 'purge_all') {
logger('notifier: purge_all: ' . $item_id);
$s = q("select * from channel where channel_id = %d limit 1",
intval($item_id)
);
if($s)
$channel = $s[0];
$uid = $item_id;
$recipients = array();
$r = q("select abook_xchan from abook where abook_channel = %d and abook_self = 0",
intval($item_id)
);
if($r) {
foreach($r as $rr) {
$recipients[] = $rr['abook_xchan'];
}
}
$private = false;
$packet_type = 'purge';
}
else {
// Normal items
// Fetch the target item
$r = q("SELECT * FROM item WHERE id = %d and parent != 0 LIMIT 1",
intval($item_id)
);
if(! $r)
return;
xchan_query($r);
$r = fetch_post_tags($r);
$target_item = $r[0];
$deleted_item = false;
if(intval($target_item['item_deleted'])) {
logger('notifier: target item ITEM_DELETED', LOGGER_DEBUG);
$deleted_item = true;
}
if(intval($target_item['item_type']) != ITEM_TYPE_POST) {
logger('notifier: target item not forwardable: type ' . $target_item['item_type'], LOGGER_DEBUG);
return;
}
// Check for non published items, but allow an exclusion for transmitting hidden file activities
if(intval($target_item['item_unpublished']) || intval($target_item['item_delayed']) ||
( intval($target_item['item_hidden']) && ($target_item['obj_type'] !== ACTIVITY_OBJ_FILE))) {
logger('notifier: target item not published, so not forwardable', LOGGER_DEBUG);
return;
}
if(strpos($target_item['postopts'],'nodeliver') !== false) {
logger('notifier: target item is undeliverable', LOGGER_DEBUG);
return;
}
$s = q("select * from channel left join xchan on channel_hash = xchan_hash where channel_id = %d limit 1",
intval($target_item['uid'])
);
if($s)
$channel = $s[0];
if($channel['channel_hash'] !== $target_item['author_xchan'] && $channel['channel_hash'] !== $target_item['owner_xchan']) {
logger("notifier: Sending channel {$channel['channel_hash']} is not owner {$target_item['owner_xchan']} or author {$target_item['author_xchan']}", LOGGER_NORMAL, LOG_WARNING);
return;
}
if($target_item['id'] == $target_item['parent']) {
$parent_item = $target_item;
$top_level_post = true;
}
else {
// fetch the parent item
$r = q("SELECT * from item where id = %d order by id asc",
intval($target_item['parent'])
);
if(! $r)
return;
if(strpos($r[0]['postopts'],'nodeliver') !== false) {
logger('notifier: target item is undeliverable', LOGGER_DEBUG, LOG_NOTICE);
return;
}
xchan_query($r);
$r = fetch_post_tags($r);
$parent_item = $r[0];
$top_level_post = false;
}
// avoid looping of discover items 12/4/2014
if($sys && $parent_item['uid'] == $sys['channel_id'])
return;
$encoded_item = encode_item($target_item);
// Send comments to the owner to re-deliver to everybody in the conversation
// We only do this if the item in question originated on this site. This prevents looping.
// To clarify, a site accepting a new comment is responsible for sending it to the owner for relay.
// Relaying should never be initiated on a post that arrived from elsewhere.
// We should normally be able to rely on ITEM_ORIGIN, but start_delivery_chain() incorrectly set this
// flag on comments for an extended period. So we'll also call comment_local_origin() which looks at
// the hostname in the message_id and provides a second (fallback) opinion.
$relay_to_owner = (((! $top_level_post) && (intval($target_item['item_origin'])) && comment_local_origin($target_item)) ? true : false);
$uplink = false;
// $cmd === 'relay' indicates the owner is sending it to the original recipients
// don't allow the item in the relay command to relay to owner under any circumstances, it will loop
logger('notifier: relay_to_owner: ' . (($relay_to_owner) ? 'true' : 'false'), LOGGER_DATA, LOG_DEBUG);
logger('notifier: top_level_post: ' . (($top_level_post) ? 'true' : 'false'), LOGGER_DATA, LOG_DEBUG);
// tag_deliver'd post which needs to be sent back to the original author
if(($cmd === 'uplink') && intval($parent_item['item_uplink']) && (! $top_level_post)) {
logger('notifier: uplink');
$uplink = true;
}
if(($relay_to_owner || $uplink) && ($cmd !== 'relay')) {
logger('notifier: followup relay', LOGGER_DEBUG);
$recipients = array(($uplink) ? $parent_item['source_xchan'] : $parent_item['owner_xchan']);
$private = true;
if(! $encoded_item['flags'])
$encoded_item['flags'] = array();
$encoded_item['flags'][] = 'relay';
}
else {
logger('notifier: normal distribution', LOGGER_DEBUG);
if($cmd === 'relay')
logger('notifier: owner relay');
// if our parent is a tag_delivery recipient, uplink to the original author causing
// a delivery fork.
if(($parent_item) && intval($parent_item['item_uplink']) && (! $top_level_post) && ($cmd !== 'uplink')) {
// don't uplink a relayed post to the relay owner
if($parent_item['source_xchan'] !== $parent_item['owner_xchan']) {
logger('notifier: uplinking this item');
Master::Summon(array('Notifier','uplink',$item_id));
}
}
$private = false;
$recipients = collect_recipients($parent_item,$private);
// FIXME add any additional recipients such as mentions, etc.
// don't send deletions onward for other people's stuff
// TODO verify this is needed - copied logic from same place in old code
if(intval($target_item['item_deleted']) && (! intval($target_item['item_wall']))) {
logger('notifier: ignoring delete notification for non-wall item', LOGGER_NORMAL, LOG_NOTICE);
return;
}
}
}
$walltowall = (($top_level_post && $channel['xchan_hash'] === $target_item['author_xchan']) ? true : false);
// Generic delivery section, we have an encoded item and recipients
// Now start the delivery process
$x = $encoded_item;
$x['title'] = 'private';
$x['body'] = 'private';
logger('notifier: encoded item: ' . print_r($x,true), LOGGER_DATA, LOG_DEBUG);
stringify_array_elms($recipients);
if(! $recipients)
return;
// logger('notifier: recipients: ' . print_r($recipients,true), LOGGER_NORMAL, LOG_DEBUG);
$env_recips = (($private) ? array() : null);
$details = q("select xchan_hash, xchan_instance_url, xchan_network, xchan_addr, xchan_guid, xchan_guid_sig from xchan where xchan_hash in (" . implode(',',$recipients) . ")");
$recip_list = array();
if($details) {
foreach($details as $d) {
$recip_list[] = $d['xchan_addr'] . ' (' . $d['xchan_hash'] . ')';
if($private)
$env_recips[] = array('guid' => $d['xchan_guid'],'guid_sig' => $d['xchan_guid_sig'],'hash' => $d['xchan_hash']);
if($d['xchan_network'] === 'mail' && $normal_mode) {
$delivery_options = get_xconfig($d['xchan_hash'],'system','delivery_mode');
if(! $delivery_options)
format_and_send_email($channel,$d,$target_item);
}
}
}
$narr = array(
'channel' => $channel,
'env_recips' => $env_recips,
'packet_recips' => $packet_recips,
'recipients' => $recipients,
'item' => $item,
'target_item' => $target_item,
'top_level_post' => $top_level_post,
'private' => $private,
'relay_to_owner' => $relay_to_owner,
'uplink' => $uplink,
'cmd' => $cmd,
'mail' => $mail,
'single' => (($cmd === 'single_mail' || $cmd === 'single_activity') ? true : false),
'location' => $location,
'request' => $request,
'normal_mode' => $normal_mode,
'packet_type' => $packet_type,
'walltowall' => $walltowall,
'queued' => array()
);
call_hooks('notifier_process', $narr);
if($narr['queued']) {
foreach($narr['queued'] as $pq)
$deliveries[] = $pq;
}
// notifier_process can alter the recipient list
$recipients = $narr['recipients'];
$env_recips = $narr['env_recips'];
$packet_recips = $narr['packet_recips'];
if(($private) && (! $env_recips)) {
// shouldn't happen
logger('notifier: private message with no envelope recipients.' . print_r($argv,true), LOGGER_NORMAL, LOG_NOTICE);
}
logger('notifier: recipients (may be delivered to more if public): ' . print_r($recip_list,true), LOGGER_DEBUG);
// Now we have collected recipients (except for external mentions, FIXME)
// Let's reduce this to a set of hubs.
$r = q("select * from hubloc where hubloc_hash in (" . implode(',',$recipients) . ")
and hubloc_error = 0 and hubloc_deleted = 0"
);
if(! $r) {
logger('notifier: no hubs', LOGGER_NORMAL, LOG_NOTICE);
return;
}
$hubs = $r;
/**
* Reduce the hubs to those that are unique. For zot hubs, we need to verify uniqueness by the sitekey, since it may have been
* a re-install which has not yet been detected and pruned.
* For other networks which don't have or require sitekeys, we'll have to use the URL
*/
$hublist = array(); // this provides an easily printable list for the logs
$dhubs = array(); // delivery hubs where we store our resulting unique array
$keys = array(); // array of keys to check uniquness for zot hubs
$urls = array(); // array of urls to check uniqueness of hubs from other networks
foreach($hubs as $hub) {
if(in_array($hub['hubloc_url'],$dead_hubs)) {
logger('skipping dead hub: ' . $hub['hubloc_url'], LOGGER_DEBUG, LOG_INFO);
continue;
}
if($hub['hubloc_network'] == 'zot') {
if(! in_array($hub['hubloc_sitekey'],$keys)) {
$hublist[] = $hub['hubloc_host'];
$dhubs[] = $hub;
$keys[] = $hub['hubloc_sitekey'];
}
}
else {
if(! in_array($hub['hubloc_url'],$urls)) {
$hublist[] = $hub['hubloc_host'];
$dhubs[] = $hub;
$urls[] = $hub['hubloc_url'];
}
}
}
logger('notifier: will notify/deliver to these hubs: ' . print_r($hublist,true), LOGGER_DEBUG, LOG_DEBUG);
foreach($dhubs as $hub) {
if($hub['hubloc_network'] !== 'zot') {
$narr = array(
'channel' => $channel,
'env_recips' => $env_recips,
'packet_recips' => $packet_recips,
'recipients' => $recipients,
'item' => $item,
'target_item' => $target_item,
'hub' => $hub,
'top_level_post' => $top_level_post,
'private' => $private,
'relay_to_owner' => $relay_to_owner,
'uplink' => $uplink,
'cmd' => $cmd,
'mail' => $mail,
'single' => (($cmd === 'single_mail' || $cmd === 'single_activity') ? true : false),
'location' => $location,
'request' => $request,
'normal_mode' => $normal_mode,
'packet_type' => $packet_type,
'walltowall' => $walltowall,
'queued' => array()
);
call_hooks('notifier_hub',$narr);
if($narr['queued']) {
foreach($narr['queued'] as $pq)
$deliveries[] = $pq;
}
continue;
}
// singleton deliveries by definition 'not got zot'.
// Single deliveries are other federated networks (plugins) and we're essentially
// delivering only to those that have this site url in their abook_instance
// and only from within a sync operation. This means if you post from a clone,
// and a connection is connected to one of your other clones; assuming that hub
// is running it will receive a sync packet. On receipt of this sync packet it
// will invoke a delivery to those connections which are connected to just that
// hub instance.
if($cmd === 'single_mail' || $cmd === 'single_activity') {
continue;
}
// default: zot protocol
$hash = random_string();
$packet = null;
if($packet_type === 'refresh' || $packet_type === 'purge') {
$packet = zot_build_packet($channel,$packet_type,(($packet_recips) ? $packet_recips : null));
}
elseif($packet_type === 'request') {
$packet = zot_build_packet($channel,$packet_type,$env_recips,$hub['hubloc_sitekey'],$hash,
array('message_id' => $request_message_id)
);
}
if($packet) {
queue_insert(array(
'hash' => $hash,
'account_id' => $channel['channel_account_id'],
'channel_id' => $channel['channel_id'],
'posturl' => $hub['hubloc_callback'],
'notify' => $packet
));
}
else {
$packet = zot_build_packet($channel,'notify',$env_recips,(($private) ? $hub['hubloc_sitekey'] : null),$hash);
queue_insert(array(
'hash' => $hash,
'account_id' => $target_item['aid'],
'channel_id' => $target_item['uid'],
'posturl' => $hub['hubloc_callback'],
'notify' => $packet,
'msg' => json_encode($encoded_item)
));
// only create delivery reports for normal undeleted items
if(is_array($target_item) && array_key_exists('postopts',$target_item) && (! $target_item['item_deleted']) && (! get_config('system','disable_dreport'))) {
q("insert into dreport ( dreport_mid, dreport_site, dreport_recip, dreport_result, dreport_time, dreport_xchan, dreport_queue ) values ( '%s','%s','%s','%s','%s','%s','%s' ) ",
dbesc($target_item['mid']),
dbesc($hub['hubloc_host']),
dbesc($hub['hubloc_host']),
dbesc('queued'),
dbesc(datetime_convert()),
dbesc($channel['channel_hash']),
dbesc($hash)
);
}
}
$deliveries[] = $hash;
}
if($normal_mode) {
$x = q("select * from hook where hook = 'notifier_normal'");
if($x)
Master::Summon(array('Deliver_hooks',$target_item['id']));
}
if($deliveries)
do_delivery($deliveries);
logger('notifier: basic loop complete.', LOGGER_DEBUG);
call_hooks('notifier_end',$target_item);
logger('notifer: complete.');
return;
}
}
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