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-rw-r--r--Zotlabs/Module/Conversation.php188
1 files changed, 188 insertions, 0 deletions
diff --git a/Zotlabs/Module/Conversation.php b/Zotlabs/Module/Conversation.php
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+++ b/Zotlabs/Module/Conversation.php
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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));
+ }
+}