diff --git a/include/items.php b/include/items.php
index 85da1d1ccf..d9e96ba814 100644
--- a/include/items.php
+++ b/include/items.php
@@ -1073,20 +1073,6 @@ function get_item_id($guid, $uid = 0) {
 	return ["nick" => $nick, "id" => $id];
 }
 
-// return - test
-/// @TODO move to src/Model/Item.php
-function get_item_contact($item, $contacts) {
-	if (! count($contacts) || (! is_array($item))) {
-		return false;
-	}
-	foreach ($contacts as $contact) {
-		if ($contact['id'] == $item['contact-id']) {
-			return $contact;
-		}
-	}
-	return false;
-}
-
 /**
  * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
  * @param int $uid
@@ -1198,78 +1184,6 @@ function tag_deliver($uid, $item_id)
 
 }
 
-/// @TODO move to src/Protocol/DFRN.php
-function tgroup_check($uid, $item) {
-
-	$mention = false;
-
-	// check that the message originated elsewhere and is a top-level post
-
-	if (($item['wall']) || ($item['origin']) || ($item['uri'] != $item['parent-uri'])) {
-		return false;
-	}
-
-	/// @TODO Encapsulate this or find it encapsulated and replace all occurrances
-	$u = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1",
-		intval($uid)
-	);
-	if (! DBM::is_result($u)) {
-		return false;
-	}
-
-	$community_page = (($u[0]['page-flags'] == PAGE_COMMUNITY) ? true : false);
-	$prvgroup = (($u[0]['page-flags'] == PAGE_PRVGROUP) ? true : false);
-
-	$link = normalise_link(System::baseUrl() . '/profile/' . $u[0]['nickname']);
-
-	/*
-	 * Diaspora uses their own hardwired link URL in @-tags
-	 * instead of the one we supply with webfinger
-	 */
-	$dlink = normalise_link(System::baseUrl() . '/u/' . $u[0]['nickname']);
-
-	$cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
-	if ($cnt) {
-		foreach ($matches as $mtch) {
-			if (link_compare($link, $mtch[1]) || link_compare($dlink, $mtch[1])) {
-				$mention = true;
-				logger('tgroup_check: mention found: ' . $mtch[2]);
-			}
-		}
-	}
-
-	if (! $mention) {
-		return false;
-	}
-
-	/// @TODO Combine both return statements into one
-	return (($community_page) || ($prvgroup));
-}
-
-/**
- * This function returns true if $update has an edited timestamp newer
- * than $existing, i.e. $update contains new data which should override
- * what's already there.  If there is no timestamp yet, the update is
- * assumed to be newer.  If the update has no timestamp, the existing
- * item is assumed to be up-to-date.  If the timestamps are equal it
- * assumes the update has been seen before and should be ignored.
- *
- * @TODO fix type-hints (both array)
- */
-/// @TODO move to src/Protocol/DFRN.php
-function edited_timestamp_is_newer($existing, $update) {
-	if (!x($existing, 'edited') || !$existing['edited']) {
-		return true;
-	}
-	if (!x($update, 'edited') || !$update['edited']) {
-		return false;
-	}
-
-	$existing_edited = datetime_convert('UTC', 'UTC', $existing['edited']);
-	$update_edited = datetime_convert('UTC', 'UTC', $update['edited']);
-	return (strcmp($existing_edited, $update_edited) < 0);
-}
-
 /**
  *
  * consume_feed - process atom feed and update anything/everything we might need to update
diff --git a/src/Protocol/DFRN.php b/src/Protocol/DFRN.php
index 7b76ddc711..15867179cd 100644
--- a/src/Protocol/DFRN.php
+++ b/src/Protocol/DFRN.php
@@ -2075,7 +2075,7 @@ class DFRN
 	{
 		$changed = false;
 
-		if (edited_timestamp_is_newer($current, $item)) {
+		if (self::editedTimestampIsNewer($current, $item)) {
 			// do not accept (ignore) an earlier edit than one we currently have.
 			if (datetime_convert("UTC", "UTC", $item["edited"]) < $current["edited"]) {
 				return false;
@@ -2417,7 +2417,7 @@ class DFRN
 		);
 
 		// Is there an existing item?
-		if (DBM::is_result($current) && edited_timestamp_is_newer($current[0], $item)
+		if (DBM::is_result($current) && self::editedTimestampIsNewer($current[0], $item)
 			&& (datetime_convert("UTC", "UTC", $item["edited"]) < $current[0]["edited"])
 		) {
 			logger("Item ".$item["uri"]." already existed.", LOGGER_DEBUG);
@@ -2708,7 +2708,7 @@ class DFRN
 				$item["owner-avatar"] = $importer["thumb"];
 			}
 
-			if (($importer["rel"] == CONTACT_IS_FOLLOWER) && (!tgroup_check($importer["importer_uid"], $item))) {
+			if (($importer["rel"] == CONTACT_IS_FOLLOWER) && (!self::tgroupCheck($importer["importer_uid"], $item))) {
 				logger("Contact ".$importer["id"]." is only follower and tgroup check was negative.", LOGGER_DEBUG);
 				return;
 			}
@@ -3089,4 +3089,73 @@ class DFRN
 		}
 		return ACTIVITY_POST;
 	}
+
+	private static function tgroupCheck($uid, $item)
+	{
+		$mention = false;
+
+		// check that the message originated elsewhere and is a top-level post
+
+		if ($item['wall'] || $item['origin'] || ($item['uri'] != $item['parent-uri'])) {
+			return false;
+		}
+
+		$u = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1",
+			intval($uid)
+		);
+		if (!DBM::is_result($u)) {
+			return false;
+		}
+
+		$community_page = ($u[0]['page-flags'] == PAGE_COMMUNITY);
+		$prvgroup = ($u[0]['page-flags'] == PAGE_PRVGROUP);
+
+		$link = normalise_link(System::baseUrl() . '/profile/' . $u[0]['nickname']);
+
+		/*
+		 * Diaspora uses their own hardwired link URL in @-tags
+		 * instead of the one we supply with webfinger
+		 */
+		$dlink = normalise_link(System::baseUrl() . '/u/' . $u[0]['nickname']);
+
+		$cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
+		if ($cnt) {
+			foreach ($matches as $mtch) {
+				if (link_compare($link, $mtch[1]) || link_compare($dlink, $mtch[1])) {
+					$mention = true;
+					logger('mention found: ' . $mtch[2]);
+				}
+			}
+		}
+
+		if (!$mention) {
+			return false;
+		}
+
+		return $community_page || $prvgroup;
+	}
+
+	/**
+	 * This function returns true if $update has an edited timestamp newer
+	 * than $existing, i.e. $update contains new data which should override
+	 * what's already there.  If there is no timestamp yet, the update is
+	 * assumed to be newer.  If the update has no timestamp, the existing
+	 * item is assumed to be up-to-date.  If the timestamps are equal it
+	 * assumes the update has been seen before and should be ignored.
+	 *
+	 */
+	private static function editedTimestampIsNewer($existing, $update)
+	{
+		if (!x($existing, 'edited') || !$existing['edited']) {
+			return true;
+		}
+		if (!x($update, 'edited') || !$update['edited']) {
+			return false;
+		}
+
+		$existing_edited = datetime_convert('UTC', 'UTC', $existing['edited']);
+		$update_edited = datetime_convert('UTC', 'UTC', $update['edited']);
+
+		return (strcmp($existing_edited, $update_edited) < 0);
+	}
 }
diff --git a/src/Worker/Delivery.php b/src/Worker/Delivery.php
index b394b0ed30..a5befb8449 100644
--- a/src/Worker/Delivery.php
+++ b/src/Worker/Delivery.php
@@ -238,7 +238,7 @@ class Delivery {
 							return;
 						}
 
-						$item_contact = get_item_contact($item,$icontacts);
+						$item_contact = self::getItemContact($item,$icontacts);
 						if (!$item_contact) {
 							return;
 						}
@@ -505,4 +505,17 @@ class Delivery {
 
 		return;
 	}
+
+	private static function getItemContact($item, $contacts)
+	{
+		if (!count($contacts) || !is_array($item)) {
+			return false;
+		}
+		foreach ($contacts as $contact) {
+			if ($contact['id'] == $item['contact-id']) {
+				return $contact;
+			}
+		}
+		return false;
+	}
 }