From ae4aeb4b1e57855d8f1788e74c56b57377df59aa Mon Sep 17 00:00:00 2001
From: zotlabs <mike@macgirvin.com>
Date: Fri, 26 Oct 2018 13:00:26 -0700
Subject: delivery chain linkage messed up if original post was edited

---
 include/items.php | 21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/include/items.php b/include/items.php
index 58461cc3a..cae380b01 100755
--- a/include/items.php
+++ b/include/items.php
@@ -2150,6 +2150,7 @@ function item_store_update($arr, $allow_exec = false, $deliver = true) {
 	unset($arr['created']);
 	unset($arr['author_xchan']);
 	unset($arr['owner_xchan']);
+	unset($arr['source_xchan']);
 	unset($arr['thr_parent']);
 	unset($arr['llink']);
 
@@ -2514,7 +2515,7 @@ function tag_deliver($uid, $item_id) {
 		// Just start the second delivery chain to deliver the updated post
 		// after resetting ownership and permission bits
 		logger('updating edited tag_deliver post for ' . $u[0]['channel_address']);
-		start_delivery_chain($u[0], $item, $item_id, 0);
+		start_delivery_chain($u[0], $item, $item_id, 0, true);
 		return;
 	}
 
@@ -2941,7 +2942,7 @@ function tgroup_check($uid, $item) {
  * @param int $item_id
  * @param boolean $parent
  */
-function start_delivery_chain($channel, $item, $item_id, $parent) {
+function start_delivery_chain($channel, $item, $item_id, $parent, $edit = false) {
 
 	$sourced = check_item_source($channel['channel_id'],$item);
 
@@ -2950,7 +2951,7 @@ function start_delivery_chain($channel, $item, $item_id, $parent) {
 			intval($channel['channel_id']),
 			dbesc(($item['source_xchan']) ?  $item['source_xchan'] : $item['owner_xchan'])
 		);
-		if($r) {
+		if($r && ! $edit) {
 			$t = trim($r[0]['src_tag']);
 			if($t) {
 				$tags = explode(',',$t);
@@ -3017,9 +3018,17 @@ function start_delivery_chain($channel, $item, $item_id, $parent) {
 	}
 	else {
 		$item_uplink = 1;
-		$r = q("update item set source_xchan = owner_xchan where id = %d",
-			intval($item_id)
-		);
+
+		// if this is an edit, item_store_update() will have already updated the item
+		// with the correct value for source_xchan (by ignoring it). We cannot set to owner_xchan
+		// in this case because owner_xchan will point to the parent of this chain
+		// and not the original sender.
+
+		if(! $edit) {
+			$r = q("update item set source_xchan = owner_xchan where id = %d",
+				intval($item_id)
+			);
+		}
 	}
 
 	$title = $item['title'];
-- 
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