diff options
Diffstat (limited to 'Zotlabs/Module/Activity.php')
| -rw-r--r-- | Zotlabs/Module/Activity.php | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/Zotlabs/Module/Activity.php b/Zotlabs/Module/Activity.php new file mode 100644 index 000000000..93b5a15fc --- /dev/null +++ b/Zotlabs/Module/Activity.php @@ -0,0 +1,175 @@ +<?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(); + + } + + } + +} |