From 92e6c21210b71acb2e1071171fa8cd7e76640f7b Mon Sep 17 00:00:00 2001
From: zotlabs <mike@macgirvin.com>
Date: Thu, 7 Feb 2019 14:13:13 -0800
Subject: add missing zot6 conversation completion (required for message
 repeats)

---
 Zotlabs/Lib/ThreadListener.php |  53 +++++++++++++++
 Zotlabs/Module/Item.php        | 144 +++++++++++++++++++++++++++++++++++++++++
 include/items.php              |  19 ++++++
 3 files changed, 216 insertions(+)
 create mode 100644 Zotlabs/Lib/ThreadListener.php

diff --git a/Zotlabs/Lib/ThreadListener.php b/Zotlabs/Lib/ThreadListener.php
new file mode 100644
index 000000000..ad682aac8
--- /dev/null
+++ b/Zotlabs/Lib/ThreadListener.php
@@ -0,0 +1,53 @@
+<?php
+
+namespace Zotlabs\Lib;
+
+class ThreadListener {
+
+	static public function store($target_id,$portable_id,$ltype = 0) {
+		$x = self::fetch($target_id,$portable_id,$ltype = 0);
+		if(! $x) {  
+			$r = q("insert into listeners ( target_id, portable_id, ltype ) values ( '%s', '%s' , %d ) ",
+				dbesc($target_id),
+				dbesc($portable_id),
+				intval($ltype)
+			);
+		}  	
+	}
+
+	static public function fetch($target_id,$portable_id,$ltype = 0) {
+		$x = q("select * from listeners where target_id = '%s' and portable_id = '%s' and ltype = %d limit 1",
+			dbesc($target_id),
+			dbesc($portable_id),
+			intval($ltype)
+		);
+		if($x) {
+			return $x[0];
+		}
+		return false;
+	}
+
+	static public function fetch_by_target($target_id,$ltype = 0) {
+		$x = q("select * from listeners where target_id = '%s' and ltype = %d limit 1",
+			dbesc($target_id),
+			intval($ltype)
+		);
+
+		return $x;
+	}
+
+	static public function delete_by_target($target_id, $ltype = 0) {
+		return q("delete from listeners where target_id = '%s' and ltype = %d",
+			dbesc($target_id),
+			intval($ltype)
+		);
+	}
+
+	static public function delete_by_pid($portable_id, $ltype = 0) {
+		return q("delete from listeners where portable_id = '%s' and ltype = %d",
+			dbesc($portable_id),
+			intval($ltype)
+		);
+	}
+
+}
\ No newline at end of file
diff --git a/Zotlabs/Module/Item.php b/Zotlabs/Module/Item.php
index f19d4907b..843be394f 100644
--- a/Zotlabs/Module/Item.php
+++ b/Zotlabs/Module/Item.php
@@ -6,6 +6,12 @@ use Zotlabs\Lib\IConfig;
 use Zotlabs\Lib\Enotify;
 use Zotlabs\Web\Controller;
 use Zotlabs\Daemon\Master;
+use Zotlabs\Lib\Activity;
+use Zotlabs\Lib\ActivityStreams;
+use Zotlabs\Lib\LDSignatures;
+use Zotlabs\Zot6\HTTPSig;
+use Zotlabs\Lib\Libzot;
+use Zotlabs\Lib\ThreadListener;
 
 require_once('include/crypto.php');
 require_once('include/items.php');
@@ -30,6 +36,144 @@ require_once('include/security.php');
 
 class Item extends Controller {
 
+
+	function init() {
+
+		if(Libzot::is_zot_request()) {
+
+			$conversation = false;
+
+			$item_id = argv(1);
+
+			if(! $item_id)
+				http_status_exit(404, 'Not found');
+
+
+			$portable_id = EMPTY_STR;
+
+			$sigdata = HTTPSig::verify(EMPTY_STR);
+			if($sigdata['portable_id'] && $sigdata['header_valid']) {
+				$portable_id = $sigdata['portable_id'];
+			}
+
+			$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 = '%s' $item_normal $sql_extra limit 1",
+				dbesc(z_root() . '/item/' . $item_id)
+			);
+			if(! $r) {
+
+
+				$r = q("select * from item where mid = '%s' $item_normal limit 1",
+					dbesc(z_root() . '/item/' . $item_id)
+				);
+				if($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();
+
+		}
+	}
+
+
+
 	function post() {
 
 		// This will change. Figure out who the observer is and whether or not
diff --git a/include/items.php b/include/items.php
index 76ae79e6f..a14e3db3a 100755
--- a/include/items.php
+++ b/include/items.php
@@ -7,6 +7,7 @@
 use Zotlabs\Lib\Enotify;
 use Zotlabs\Lib\MarkdownSoap;
 use Zotlabs\Lib\MessageFilter;
+use Zotlabs\Lib\ThreadListener;
 use Zotlabs\Lib\IConfig;
 use Zotlabs\Access\PermissionLimits;
 use Zotlabs\Access\AccessList;
@@ -141,6 +142,22 @@ function collect_recipients($item, &$private_envelope,$include_groups = true) {
 //				$recipients[] = $sys['xchan_hash'];
 		}
 
+
+		// Forward to thread listeners, *unless* there is even a remote hint that the item
+		// might have some privacy attached. This could be (for instance) an ActivityPub DM
+		// in the middle of a public thread. Unless we can guarantee beyond all doubt that
+		// this is public, don't allow it to go to thread listeners.
+
+		if(! intval($item['item_private'])) {
+			$r = ThreadListener::fetch_by_target($item['parent_mid']);
+			if($r) {
+				foreach($r as $rv) {
+					$recipients[] = $rv['portable_id'];
+				}
+			}
+		}
+
+
 		// Add the authors of any posts in this thread, if they are known to us.
 		// This is specifically designed to forward wall-to-wall posts to the original author,
 		// in case they aren't a connection but have permission to write on our wall.
@@ -3867,6 +3884,8 @@ function delete_item_lowlevel($item, $stage = DROPITEM_NORMAL, $force = false) {
 		intval(TERM_OBJ_POST)
 	);
 
+	ThreadListener::delete_by_target($item['mid']);
+
 	/** @FIXME remove notifications for this item */
 
 	return true;
-- 
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