From 7fb02752de4e3ee62d84eaf30bcb4c155ebabf30 Mon Sep 17 00:00:00 2001
From: zotlabs <mike@macgirvin.com>
Date: Tue, 3 Oct 2017 17:03:24 -0700
Subject: hubzilla issue #868

---
 Zotlabs/Module/Thing.php       |  4 ++++
 include/photo/photo_driver.php | 21 +++++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/Zotlabs/Module/Thing.php b/Zotlabs/Module/Thing.php
index 95c6c5636..f816632ab 100644
--- a/Zotlabs/Module/Thing.php
+++ b/Zotlabs/Module/Thing.php
@@ -91,6 +91,7 @@ class Thing extends \Zotlabs\Web\Controller {
 			}
 			$orig_record = $t[0];
 			if($photo != $orig_record['obj_imgurl']) {
+				delete_thing_photo($orig_record['obj_imgurl'],get_observer_hash());
 				$arr = import_xchan_photo($photo,get_observer_hash(),true);
 				$local_photo = $arr[0];
 				$local_photo_type = $arr[3];
@@ -336,6 +337,9 @@ class Thing extends \Zotlabs\Web\Controller {
 				return '';
 			}
 
+
+			delete_thing_photo($r[0]['obj_imgurl'],get_observer_hash());
+
 			$x = q("delete from obj where obj_obj = '%s' and obj_type = %d and obj_channel = %d",
 				dbesc($thing_hash),
 				intval(TERM_OBJ_THING),
diff --git a/include/photo/photo_driver.php b/include/photo/photo_driver.php
index 17ca81419..3b6beabf5 100644
--- a/include/photo/photo_driver.php
+++ b/include/photo/photo_driver.php
@@ -518,6 +518,27 @@ function guess_image_type($filename, $headers = '') {
 
 }
 
+
+function delete_thing_photo($url,$ob_hash) {
+
+	$hash = basename($url);
+	$hash = substr($hash,0,strpos($hash,'-'));
+
+	// hashes should be 32 bytes. 
+
+	if(strlen($hash) < 16)
+		return;	
+
+	$r = q("delete from photo where xchan = '%s' and photo_usage = %d and resource_id = '%s'",
+		dbesc($ob_hash),
+		intval(PHOTO_THING),
+		dbesc($hash)
+	);
+	
+}
+
+
+
 function import_xchan_photo($photo,$xchan,$thing = false) {
 
 	$flags = (($thing) ? PHOTO_THING : PHOTO_XCHAN);
-- 
cgit v1.2.3