From fc246424a907e91fc19a4aa9ac7ef3526523607e Mon Sep 17 00:00:00 2001
From: Hypolite Petovan <hypolite@mrpetovan.com>
Date: Wed, 7 Dec 2022 22:21:23 -0500
Subject: [PATCH] Provide default host value to hash() in
 Model\Item::guidFromUri

- Address part of https://github.com/friendica/friendica/issues/12011#issuecomment-1338133783
---
 src/Contact/Avatar.php |  2 +-
 src/Model/Contact.php  |  4 ++--
 src/Model/Item.php     | 10 ++++++++--
 src/Model/Mail.php     |  3 +--
 src/Protocol/Feed.php  |  4 ++--
 5 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/src/Contact/Avatar.php b/src/Contact/Avatar.php
index 0cfc8df345..711a8549f2 100644
--- a/src/Contact/Avatar.php
+++ b/src/Contact/Avatar.php
@@ -125,7 +125,7 @@ class Avatar
 
 	private static function getFilename(string $url): string
 	{
-		$guid = Item::guidFromUri($url, parse_url($url, PHP_URL_HOST));
+		$guid = Item::guidFromUri($url);
 
 		return substr($guid, 0, 2) . '/' . substr($guid, 3, 2) . '/' . substr($guid, 5, 3) . '/' .
 			substr($guid, 9, 2) .'/' . substr($guid, 11, 2) . '/' . substr($guid, 13, 4). '/' . substr($guid, 18) . '-';
diff --git a/src/Model/Contact.php b/src/Model/Contact.php
index 873de08906..4a10fd98ea 100644
--- a/src/Model/Contact.php
+++ b/src/Model/Contact.php
@@ -2099,7 +2099,7 @@ class Contact
 		if ($static) {
 			$query_params['static'] = true;
 		}
-		
+
 		return $url . ($guid ?: $cid) . (!empty($query_params) ? '?' . http_build_query($query_params) : '');
 	}
 
@@ -2675,7 +2675,7 @@ class Contact
 		}
 
 		$update = false;
-		$guid = ($ret['guid'] ?? '') ?: Item::guidFromUri($ret['url'], parse_url($ret['url'], PHP_URL_HOST));
+		$guid = ($ret['guid'] ?? '') ?: Item::guidFromUri($ret['url']);
 
 		// make sure to not overwrite existing values with blank entries except some technical fields
 		$keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
diff --git a/src/Model/Item.php b/src/Model/Item.php
index ff4791a7cc..8b9909f8bf 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -2034,9 +2034,10 @@ class Item
 	 * Posts that are created on this system are using System::createUUID.
 	 * Received ActivityPub posts are using Processor::getGUIDByURL.
 	 *
-	 * @param string      $uri uri of an item entry
+	 * @param string      $uri  uri of an item entry
 	 * @param string|null $host hostname for the GUID prefix
 	 * @return string Unique guid
+	 * @throws \Exception
 	 */
 	public static function guidFromUri(string $uri, string $host = null): string
 	{
@@ -2047,11 +2048,16 @@ class Item
 		// Remove the scheme to make sure that "https" and "http" doesn't make a difference
 		unset($parsed['scheme']);
 
+		$hostPart = $host ?? $parsed['host'] ?? '';
+		if (!$hostPart) {
+			Logger::warning('Empty host GUID part', ['uri' => $uri, 'host' => $host, 'parsed' => $parsed, 'callstack' => System::callstack(10)]);
+		}
+
 		// Glue it together to be able to make a hash from it
 		$host_id = implode('/', $parsed);
 
 		// Use a mixture of several hashes to provide some GUID like experience
-		return hash('crc32', $host) . '-'. hash('joaat', $host_id) . '-'. hash('fnv164', $host_id);
+		return hash('crc32', $hostPart) . '-' . hash('joaat', $host_id) . '-' . hash('fnv164', $host_id);
 	}
 
 	/**
diff --git a/src/Model/Mail.php b/src/Model/Mail.php
index 6ccce24ba7..9469483d9a 100644
--- a/src/Model/Mail.php
+++ b/src/Model/Mail.php
@@ -59,8 +59,7 @@ class Mail
 		}
 
 		if (empty($msg['guid'])) {
-			$host = parse_url($msg['from-url'], PHP_URL_HOST);
-			$msg['guid'] = Item::guidFromUri($msg['uri'], $host);
+			$msg['guid'] = Item::guidFromUri($msg['uri'], parse_url($msg['from-url'], PHP_URL_HOST));
 		}
 
 		$msg['created'] = (!empty($msg['created']) ? DateTimeFormat::utc($msg['created']) : DateTimeFormat::utcNow());
diff --git a/src/Protocol/Feed.php b/src/Protocol/Feed.php
index 29b1923316..dec463820d 100644
--- a/src/Protocol/Feed.php
+++ b/src/Protocol/Feed.php
@@ -625,8 +625,8 @@ class Feed
 
 			$notify = Item::isRemoteSelf($contact, $item);
 
-			// Distributed items should have a well formatted URI.
-			// Additionally we have to avoid conflicts with identical URI between imported feeds and these items.
+			// Distributed items should have a well-formatted URI.
+			// Additionally, we have to avoid conflicts with identical URI between imported feeds and these items.
 			if ($notify) {
 				$item['guid'] = Item::guidFromUri($orig_plink, DI::baseUrl()->getHostname());
 				$item['uri'] = Item::newURI($item['guid']);