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|
<?php
namespace Zotlabs\Module;
use Zotlabs\Lib\IConfig;
use Zotlabs\Lib\Enotify;
use Zotlabs\Web\Controller;
use Zotlabs\Daemon\Master;
use Zotlabs\Lib\Activity as ZlibActivity;
use Zotlabs\Lib\ActivityStreams;
use Zotlabs\Lib\LDSignatures;
use Zotlabs\Web\HTTPSig;
use Zotlabs\Lib\Libzot;
use Zotlabs\Lib\ThreadListener;
use App;
class Activity extends Controller {
function init() {
if (Libzot::is_zot_request()) {
$item_id = argv(1);
if (! $item_id)
http_status_exit(404, 'Not found');
$portable_id = EMPTY_STR;
$item_normal = " and item.item_hidden = 0 and item.item_type = 0 and item.item_unpublished = 0 and item.item_delayed = 0 and item.item_blocked = 0 ";
$i = null;
// do we have the item (at all)?
$r = q("select * from item where mid = '%s' $item_normal limit 1",
dbesc(z_root() . '/activity/' . $item_id)
);
if (! $r) {
http_status_exit(404,'Not found');
}
// process an authenticated fetch
$sigdata = HTTPSig::verify(EMPTY_STR);
if($sigdata['portable_id'] && $sigdata['header_valid']) {
$portable_id = $sigdata['portable_id'];
observer_auth($portable_id);
// first see if we have a copy of this item's parent owned by the current signer
// include xchans for all zot-like networks - these will have the same guid and public key
$x = q("select * from xchan where xchan_hash = '%s'",
dbesc($sigdata['portable_id'])
);
if ($x) {
$xchans = q("select xchan_hash from xchan where xchan_hash = '%s' OR ( xchan_guid = '%s' AND xchan_pubkey = '%s' ) ",
dbesc($sigdata['portable_id']),
dbesc($x[0]['xchan_guid']),
dbesc($x[0]['xchan_pubkey'])
);
if ($xchans) {
$hashes = ids_to_querystr($xchans,'xchan_hash',true);
$i = q("select id as item_id from item where mid = '%s' $item_normal and owner_xchan in ( " . protect_sprintf($hashes) . " ) limit 1",
dbesc($r[0]['parent_mid'])
);
}
}
}
// if we don't have a parent id belonging to the signer see if we can obtain one as a visitor that we have permission to access
// with a bias towards those items owned by channels on this site (item_wall = 1)
$sql_extra = item_permissions_sql(0);
if (! $i) {
$i = q("select id as item_id from item where mid = '%s' $item_normal $sql_extra order by item_wall desc limit 1",
dbesc($r[0]['parent_mid'])
);
}
if(! $i) {
http_status_exit(403,'Forbidden');
}
$parents_str = ids_to_querystr($i,'item_id');
$items = q("SELECT item.*, item.id AS item_id FROM item WHERE item.parent IN ( %s ) $item_normal ",
dbesc($parents_str)
);
if(! $items) {
http_status_exit(404, 'Not found');
}
xchan_query($items,true);
$items = fetch_post_tags($items,true);
$observer = App::get_observer();
$parent = $items[0];
$recips = (($parent['owner']['xchan_network'] === 'activitypub') ? get_iconfig($parent['id'],'activitypub','recips', []) : []);
$to = (($recips && array_key_exists('to',$recips) && is_array($recips['to'])) ? $recips['to'] : null);
$nitems = [];
foreach($items as $i) {
$mids = [];
if(intval($i['item_private'])) {
if(! $observer) {
continue;
}
// ignore private reshare, possibly from hubzilla
if($i['verb'] === 'Announce') {
if(! in_array($i['thr_parent'],$mids)) {
$mids[] = $i['thr_parent'];
}
continue;
}
// also ignore any children of the private reshares
if(in_array($i['thr_parent'],$mids)) {
continue;
}
if((! $to) || (! in_array($observer['xchan_url'],$to))) {
continue;
}
}
$nitems[] = $i;
}
if(! $nitems)
http_status_exit(404, 'Not found');
$chan = channelx_by_n($nitems[0]['uid']);
if(! $chan)
http_status_exit(404, 'Not found');
if(! perm_is_allowed($chan['channel_id'],get_observer_hash(),'view_stream'))
http_status_exit(403, 'Forbidden');
$i = ZlibActivity::encode_item_collection($nitems,'conversation/' . $item_id,'OrderedCollection');
if($portable_id) {
ThreadListener::store(z_root() . '/activity/' . $item_id,$portable_id);
}
if(! $i)
http_status_exit(404, 'Not found');
$x = array_merge(['@context' => [
ACTIVITYSTREAMS_JSONLD_REV,
'https://w3id.org/security/v1',
z_root() . ZOT_APSCHEMA_REV
]], $i);
$headers = [];
$headers['Content-Type'] = 'application/x-zot+json' ;
$x['signature'] = LDSignatures::sign($x,$chan);
$ret = json_encode($x, JSON_UNESCAPED_SLASHES);
$headers['Digest'] = HTTPSig::generate_digest_header($ret);
$headers['(request-target)'] = strtolower($_SERVER['REQUEST_METHOD']) . ' ' . $_SERVER['REQUEST_URI'];
$h = HTTPSig::create_sig($headers,$chan['channel_prvkey'],channel_url($chan));
HTTPSig::set_headers($h);
echo $ret;
killme();
}
}
}
|
