From: Michael <heluecht@pirati.ca>
Date: Sun, 19 Jan 2020 14:33:16 +0000 (+0000)
Subject: AP: Create a GUID out of an URL
X-Git-Url: https://git.mxchange.org/?a=commitdiff_plain;h=bb253ceeaafaa317276ad38c692b292692a2cadf;p=friendica.git

AP: Create a GUID out of an URL
---

diff --git a/src/Protocol/ActivityPub/Processor.php b/src/Protocol/ActivityPub/Processor.php
index 89abac6c94..cc5c90d3b8 100644
--- a/src/Protocol/ActivityPub/Processor.php
+++ b/src/Protocol/ActivityPub/Processor.php
@@ -389,6 +389,26 @@ class Processor
 		return $item;
 	}
 
+	/**
+	 * Generate a GUID out of an URL
+	 *
+	 * @param string $url message URL
+	 * @return string with GUID
+	 */
+	private static function getGUIDByURL(string $url)
+	{
+		$parsed = parse_url($url);
+
+		$host_hash = hash('crc32', $parsed['host']);
+
+		unset($parsed["scheme"]);
+		unset($parsed["host"]);
+
+		$path = implode("/", $parsed);
+
+		return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
+	}
+
 	/**
 	 * Creates an item post
 	 *
@@ -431,7 +451,7 @@ class Processor
 
 		$item['created'] = DateTimeFormat::utc($activity['published']);
 		$item['edited'] = DateTimeFormat::utc($activity['updated']);
-		$item['guid'] = $activity['diaspora:guid'];
+		$item['guid'] = $activity['diaspora:guid'] ?: self::getGUIDByURL($item['uri']);
 
 		$item = self::processContent($activity, $item);
 		if (empty($item)) {