support zot location independent urls

1 files changed, 186 insertions, 0 deletions

diff --git a/Zotlabs/Module/Id.php b/Zotlabs/Module/Id.php
new file mode 100644
index 000000000..9addd673f
--- /dev/null
+++ b/Zotlabs/Module/Id.php
@@ -0,0 +1,186 @@
+<?php
+
+namespace Zotlabs\Module;
+
+/**
+ *
+ * Controller for responding to x-zot: protocol requests
+ * x-zot:_jkfRG85nJ-714zn-LW_VbTFW8jSjGAhAydOcJzHxqHkvEHWG2E0RbA_pbch-h4R63RG1YJZifaNzgccoLa3MQ/453c1678-1a79-4af7-ab65-6b012f6cab77
+ *  
+ */  
+
+use Zotlabs\Lib\Activity;
+use Zotlabs\Lib\ActivityStreams;
+use Zotlabs\Lib\LDSignatures;
+use Zotlabs\Zot6\HTTPSig;
+use Zotlabs\Web\Controller;
+use Zotlabs\Lib\Libzot;
+use Zotlabs\Lib\ThreadListener;
+use Zotlabs\Lib\IConfig;
+use Zotlabs\Lib\Enotify;
+use App;
+
+require_once('include/attach.php');
+require_once('include/bbcode.php');
+require_once('include/security.php');
+
+
+class Id extends Controller {
+
+	function init() {
+
+		if(Libzot::is_zot_request()) {
+
+			$conversation = false;
+
+			$request_portable_id = argv(1);
+			if(argc() > 2) {
+				$item_id = argv(2);
+			}
+
+			$portable_id = EMPTY_STR;
+
+			$sigdata = HTTPSig::verify(EMPTY_STR);
+			if($sigdata['portable_id'] && $sigdata['header_valid']) {
+				$portable_id = $sigdata['portable_id'];
+			}
+
+			$r = q("select channel_id, channel_address from channel where channel_hash = '%s' limit 1",
+				dbesc($request_portable_id)
+			);
+			if($r) {
+				$channel_id = $r[0]['channel_id'];
+				if(! $item_id) {
+					$handler = new Channel();
+					App::$argc = 2;
+					App::$argv[0] = 'channel';
+					App::$argv[1] = $r[0]['channel_address'];
+					$handler->init();
+				}
+			}
+			else {
+				http_status_exit(404, 'Not found');
+			}
+
+
+			$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 ";
+
+			$sql_extra = item_permissions_sql(0);
+
+			$r = q("select * from item where mid like '%s' $item_normal $sql_extra and uid = %d limit 1",
+				dbesc('%/' . $item_id),
+				intval($channel_id)
+			);
+			if(! $r) {
+
+				$r = q("select * from item where mid like '%s' $item_normal and uid = %d limit 1",
+					dbesc('%/' . $item_id),
+					intval($channel_id)
+				);
+				if($r) {
+					http_status_exit(403, 'Forbidden');
+				}
+				http_status_exit(404, 'Not found');
+			}
+
+
+			$items = q("select parent as item_id from item where mid = '%s' and uid = %d $item_normal $sql_extra ",
+				dbesc($r[0]['parent_mid']),
+				intval($r[0]['uid'])
+			);
+			if(! $items) {
+				http_status_exit(404, 'Not found');
+			}
+
+			$r = $items;
+
+			$parents_str = ids_to_querystr($r,'item_id');
+	
+			$items = q("SELECT item.*, item.id AS item_id FROM item WHERE item.parent IN ( %s ) $item_normal $sql_extra ",
+				dbesc($parents_str)
+			);
+
+			if(! $items) {
+				http_status_exit(404, 'Not found');
+			}
+
+			$r = $items;
+			xchan_query($r,true);
+			$items = fetch_post_tags($r,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');
+
+			$i = Activity::encode_item_collection($nitems,'conversation/' . $item_id,'OrderedCollection',( defined('NOMADIC') ? false : true));
+			if($portable_id) {
+				ThreadListener::store(z_root() . '/item/' . $item_id,$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();
+
+		}
+
+	}
+
+}
+
+