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-rw-r--r--Zotlabs/Module/Activity.php175
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();
+
+ }
+
+ }
+
+}