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<?php
namespace Zotlabs\Module;
use Zotlabs\Web\Controller;
use Zotlabs\Lib\ActivityStreams;
use Zotlabs\Lib\Activity;
use Zotlabs\Lib\Libzot;
use Zotlabs\Web\HTTPSig;
use Zotlabs\Lib\LDSignatures;
use Zotlabs\Lib\ThreadListener;
use Zotlabs\Lib\Config;
use App;
class Conversation extends Controller {
public function init() {
if (ActivityStreams::is_as_request()) {
$item_id = argv(1);
if (!$item_id) {
http_status_exit(404, 'Not found');
}
$portable_id = EMPTY_STR;
$item_normal_extra = sprintf(" and not verb in ('%s', '%s') ",
dbesc(ACTIVITY_FOLLOW),
dbesc(ACTIVITY_UNFOLLOW)
);
$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 $item_normal_extra ";
$i = null;
// do we have the item (at all)?
$r = q("select parent_mid from item where mid = '%s' or uuid = '%s' $item_normal order by item_wall desc limit 1",
dbesc(z_root() . '/item/' . $item_id),
dbesc($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'])
);
}
}
}
elseif (Config::get('system', 'require_authenticated_fetch', false)) {
http_status_exit(403, 'Permission denied');
}
// 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');
$itemspage = 30;
$page = $_REQUEST['page'] ?? 1;
$offset = (intval($page) - 1) * $itemspage;
$items = dbq("SELECT item.*,
item.id AS item_id,
(SELECT count(*) FROM item WHERE item.parent IN ( $parents_str ) $item_normal) AS total
FROM item WHERE item.parent IN ( $parents_str ) $item_normal order by item.id LIMIT $itemspage OFFSET $offset"
);
if (!$items) {
http_status_exit(404, 'Not found');
}
xchan_query($items, true);
$items = fetch_post_tags($items);
$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');
}
App::set_pager_total($nitems[0]['total']);
App::set_pager_itemspage($itemspage);
$channel = channelx_by_n($nitems[0]['uid']);
if (!$channel) {
http_status_exit(404, 'Not found');
}
if (!perm_is_allowed($channel['channel_id'], get_observer_hash(), 'view_stream')) {
http_status_exit(403, 'Forbidden');
}
$i = Activity::encode_item_collection($nitems, App::$query_string, 'OrderedCollection', $nitems[0]['total']);
if (!$i) {
http_status_exit(404, 'Not found');
}
if ($portable_id && (!intval($nitems[0]['item_private']))) {
$c = q("select abook_id from abook where abook_channel = %d and abook_xchan = '%s'",
intval($nitems[0]['uid']),
dbesc($portable_id)
);
if (!$c) {
ThreadListener::store(z_root() . '/item/' . $item_id, $portable_id);
}
}
as_return_and_die($i, $channel);
}
goaway(z_root() . '/item/' . argv(1));
}
}
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