From 0acb5d4558d3641c47f01a056751c4410b7c4953 Mon Sep 17 00:00:00 2001
From: Michael <heluecht@pirati.ca>
Date: Thu, 28 May 2020 16:02:36 +0000
Subject: [PATCH] "parent = id" is replaced with gravity check

---
 include/api.php           | 11 +++++++----
 include/conversation.php  |  2 +-
 mod/photos.php            |  2 +-
 src/Protocol/DFRN.php     |  2 +-
 src/Protocol/OStatus.php  |  2 +-
 view/theme/frio/theme.php |  2 +-
 6 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/include/api.php b/include/api.php
index f1a8e5ee9..90d0a511b 100644
--- a/include/api.php
+++ b/include/api.php
@@ -1647,7 +1647,8 @@ function api_statuses_home_timeline($type)
 		$condition[] = $max_id;
 	}
 	if ($exclude_replies) {
-		$condition[0] .= ' AND `item`.`parent` = `item`.`id`';
+		$condition[0] .= ' AND `item`.`gravity` = ?';
+		$condition[] = GRAVITY_PARENT;
 	}
 	if ($conversation_id > 0) {
 		$condition[0] .= " AND `item`.`parent` = ?";
@@ -2255,7 +2256,8 @@ function api_statuses_user_timeline($type)
 	}
 
 	if ($exclude_replies) {
-		$condition[0] .= ' AND `item`.`parent` = `item`.`id`';
+		$condition[0] .= ' AND `item`.`gravity` = ?';
+		$condition[] = GRAVITY_PARENT;
 	}
 
 	if ($conversation_id > 0) {
@@ -3305,7 +3307,8 @@ function api_lists_statuses($type)
 		$condition[] = $max_id;
 	}
 	if ($exclude_replies > 0) {
-		$condition[0] .= ' AND `item`.`parent` = `item`.`id`';
+		$condition[0] .= ' AND `item`.`gravity` = ?';
+		$condition[] = GRAVITY_PARENT;
 	}
 	if ($conversation_id > 0) {
 		$condition[0] .= " AND `item`.`parent` = ?";
@@ -5199,7 +5202,7 @@ function api_in_reply_to($item)
 	$in_reply_to['user_id_str'] = null;
 	$in_reply_to['screen_name'] = null;
 
-	if (($item['thr-parent'] != $item['uri']) && (intval($item['parent']) != intval($item['id']))) {
+	if (($item['thr-parent'] != $item['uri']) && ($item['gravity'] != GRAVITY_PARENT)) {
 		$parent = Item::selectFirst(['id'], ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
 		if (DBA::isResult($parent)) {
 			$in_reply_to['status_id'] = intval($parent['id']);
diff --git a/include/conversation.php b/include/conversation.php
index 1f597756f..6fdfd30b4 100644
--- a/include/conversation.php
+++ b/include/conversation.php
@@ -823,7 +823,7 @@ function item_photo_menu($item) {
 	$block_link = '';
 	$ignore_link = '';
 
-	if (local_user() && local_user() == $item['uid'] && $item['parent'] == $item['id'] && !$item['self']) {
+	if (local_user() && local_user() == $item['uid'] && $item['gravity'] == GRAVITY_PARENT && !$item['self']) {
 		$sub_link = 'javascript:dosubthread(' . $item['id'] . '); return false;';
 	}
 
diff --git a/mod/photos.php b/mod/photos.php
index 7b74a39dd..7240c0052 100644
--- a/mod/photos.php
+++ b/mod/photos.php
@@ -1287,7 +1287,7 @@ function photos_content(App $a)
 		}
 
 		if (!empty($link_item['parent']) && !empty($link_item['uid'])) {
-			$condition = ["`parent` = ? AND `parent` != `id`",  $link_item['parent']];
+			$condition = ["`parent` = ? AND `gravity` != ?",  $link_item['parent'], GRAVITY_PARENT];
 			$total = DBA::count('item', $condition);
 
 			$pager = new Pager(DI::l10n(), DI::args()->getQueryString());
diff --git a/src/Protocol/DFRN.php b/src/Protocol/DFRN.php
index 54e44f5b9..10541c0e3 100644
--- a/src/Protocol/DFRN.php
+++ b/src/Protocol/DFRN.php
@@ -960,7 +960,7 @@ class DFRN
 		$dfrnowner = self::addEntryAuthor($doc, "dfrn:owner", $item["owner-link"], $item);
 		$entry->appendChild($dfrnowner);
 
-		if (($item['parent'] != $item['id']) || ($item['parent-uri'] !== $item['uri']) || (($item['thr-parent'] !== '') && ($item['thr-parent'] !== $item['uri']))) {
+		if ($item['gravity'] != GRAVITY_PARENT) {
 			$parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
 			$parent = Item::selectFirst(['guid', 'plink'], ['uri' => $parent_item, 'uid' => $item['uid']]);
 			$attributes = ["ref" => $parent_item, "type" => "text/html",
diff --git a/src/Protocol/OStatus.php b/src/Protocol/OStatus.php
index 24decc000..411bdd63c 100644
--- a/src/Protocol/OStatus.php
+++ b/src/Protocol/OStatus.php
@@ -2020,7 +2020,7 @@ class OStatus
 	{
 		$mentioned = [];
 
-		if (($item['parent'] != $item['id']) || ($item['parent-uri'] !== $item['uri']) || (($item['thr-parent'] !== '') && ($item['thr-parent'] !== $item['uri']))) {
+		if ($item['gravity'] != GRAVITY_PARENT) {
 			$parent = Item::selectFirst(['guid', 'author-link', 'owner-link'], ['id' => $item['parent']]);
 			$parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
 
diff --git a/view/theme/frio/theme.php b/view/theme/frio/theme.php
index 94b29d860..0202fda0e 100644
--- a/view/theme/frio/theme.php
+++ b/view/theme/frio/theme.php
@@ -346,7 +346,7 @@ function frio_display_item(App $a, &$arr)
 	if (
 		local_user()
 		&& local_user() == $arr['item']['uid']
-		&& $arr['item']['parent'] == $arr['item']['id']
+		&& $arr['item']['gravity'] == GRAVITY_PARENT
 		&& !$arr['item']['self'])
 	{
 		$subthread = [