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180 lines
6.4 KiB
PHP
180 lines
6.4 KiB
PHP
<?php
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namespace Code\Module;
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use Code\Web\Controller;
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use Code\Lib\ActivityStreams;
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use Code\Lib\Activity as ZlibActivity;
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use Code\Lib\Libzot;
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use Code\Web\HTTPSig;
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use Code\Lib\ThreadListener;
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use Code\Lib\Channel;
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use App;
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class Conversation extends Controller
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{
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public function init()
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{
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if (ActivityStreams::is_as_request() || Libzot::is_nomad_request()) {
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$item_id = argv(1);
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if (!$item_id) {
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http_status_exit(404, 'Not found');
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}
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$portable_id = EMPTY_STR;
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$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 and not verb in ( 'Follow', 'Ignore' ) ";
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$i = null;
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// do we have the item (at all)?
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$test = q(
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"select * from item where mid = '%s' $item_normal limit 1",
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dbesc(z_root() . '/activity/' . $item_id)
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);
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if (!$test) {
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$test = q(
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"select * from item where mid = '%s' $item_normal limit 1",
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dbesc(z_root() . '/item/' . $item_id)
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);
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if (!$test) {
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http_status_exit(404, 'Not found');
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}
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}
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// process an authenticated fetch
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$sigdata = HTTPSig::verify(EMPTY_STR);
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if ($sigdata['portable_id'] && $sigdata['header_valid']) {
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$portable_id = $sigdata['portable_id'];
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observer_auth($portable_id);
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// first see if we have a copy of this item's parent owned by the current signer
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// include xchans for all zot-like networks - these will have the same guid and public key
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$x = q(
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"select * from xchan where xchan_hash = '%s'",
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dbesc($sigdata['portable_id'])
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);
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if ($x) {
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$xchans = q(
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"select xchan_hash from xchan where xchan_hash = '%s' OR ( xchan_guid = '%s' AND xchan_pubkey = '%s' ) ",
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dbesc($sigdata['portable_id']),
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dbesc($x[0]['xchan_guid']),
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dbesc($x[0]['xchan_pubkey'])
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);
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if ($xchans) {
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$hashes = ids_to_querystr($xchans, 'xchan_hash', true);
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$i = q(
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"select id as item_id, item_private, uid from item where mid = '%s' $item_normal and owner_xchan in ( " . protect_sprintf($hashes) . " ) limit 1",
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dbesc($test[0]['parent_mid'])
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);
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}
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}
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}
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// if we don't have a parent id belonging to the signer see if we can obtain one as a visitor that we have permission to access
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// with a bias towards those items owned by channels on this site (item_wall = 1)
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$sql_extra = item_permissions_sql(0);
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if (!$i) {
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$i = q(
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"select id as item_id from item, item_private, uid where mid = '%s' $item_normal $sql_extra order by item_wall desc limit 1",
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dbesc($test[0]['parent_mid'])
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);
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}
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if (!$i) {
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http_status_exit(403, 'Forbidden');
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}
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$parents_str = ids_to_querystr($i, 'item_id');
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$items = q(
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"SELECT item.*, item.id AS item_id FROM item WHERE item.parent IN ( %s ) $item_normal and verb = 'Add' and item_private = %d and uid = %d",
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dbesc($parents_str),
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intval($i[0]['item_private']),
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intval($i[0]['uid'])
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);
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if (!$items) {
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http_status_exit(404, 'Not found');
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}
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xchan_query($items, true);
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$items = fetch_post_tags($items);
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$observer = App::get_observer();
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$parent = $items[0];
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$recips = (($parent['owner']['xchan_network'] === 'activitypub') ? get_iconfig($parent['id'], 'activitypub', 'recips', []) : []);
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$to = (($recips && array_key_exists('to', $recips) && is_array($recips['to'])) ? $recips['to'] : null);
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$nitems = [];
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foreach ($items as $i) {
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$mids = [];
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if (intval($i['item_private'])) {
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if (!$observer) {
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continue;
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}
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// ignore private reshare, possibly from hubzilla
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if ($i['verb'] === 'Announce') {
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if (!in_array($i['thr_parent'], $mids)) {
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$mids[] = $i['thr_parent'];
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}
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continue;
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}
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// also ignore any children of the private reshares
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if (in_array($i['thr_parent'], $mids)) {
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continue;
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}
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if ($observer['xchan_hash'] !== $i['owner_xchan']) {
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if (empty($to)) {
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continue;
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}
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if (!in_array($observer['xchan_url'], $to)) {
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continue;
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}
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}
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}
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$nitems[] = $i;
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}
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if (!$nitems) {
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http_status_exit(404, 'Not found');
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}
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$chan = Channel::from_id($nitems[0]['uid']);
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if (!$chan) {
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http_status_exit(404, 'Not found');
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}
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if (!perm_is_allowed($chan['channel_id'], get_observer_hash(), 'view_stream')) {
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http_status_exit(403, 'Forbidden');
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}
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$i = ZlibActivity::encode_item_collection($nitems, 'conversation/' . $item_id, 'OrderedCollection', true, z_root() . '/channel/' . $chan['channel_address'], count($nitems));
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if ($portable_id && (!intval($items[0]['item_private']))) {
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ThreadListener::store(z_root() . '/activity/' . $item_id, $portable_id);
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}
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if (!$i) {
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http_status_exit(404, 'Not found');
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}
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$channel = Channel::from_id($items[0]['uid']);
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as_return_and_die($i, $channel);
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}
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goaway(z_root() . '/item/' . argv(1));
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}
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}
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