From 34cb0aa406969967fa521211116564805ef6b631 Mon Sep 17 00:00:00 2001
From: Michael <heluecht@pirati.ca>
Date: Thu, 20 Sep 2018 05:30:07 +0000
Subject: [PATCH] JSON-LD stuff is now in a separate file

---
 src/Protocol/ActivityPub.php | 47 -------------------------
 src/Util/JsonLD.php          | 68 ++++++++++++++++++++++++++++++++++++
 2 files changed, 68 insertions(+), 47 deletions(-)
 create mode 100644 src/Util/JsonLD.php

diff --git a/src/Protocol/ActivityPub.php b/src/Protocol/ActivityPub.php
index 4a2394a24..36cc32d64 100644
--- a/src/Protocol/ActivityPub.php
+++ b/src/Protocol/ActivityPub.php
@@ -19,8 +19,6 @@ use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Crypto;
 use Friendica\Content\Text\BBCode;
 use Friendica\Content\Text\HTML;
-use Friendica\Core\Cache;
-use digitalbazaar\jsonld;
 
 /**
  * @brief ActivityPub Protocol class
@@ -58,51 +56,6 @@ class ActivityPub
 {
 	const PUBLIC = 'https://www.w3.org/ns/activitystreams#Public';
 
-public static function jsonld_document_loader($url)
-{
-	$recursion = 0;
-
-	$x = debug_backtrace();
-	if ($x) {
-		foreach ($x as $n) {
-			if ($n['function'] === __FUNCTION__)  {
-				$recursion ++;
-			}
-		}
-	}
-
-	if ($recursion > 5) {
-		logger('jsonld bomb detected at: ' . $url);
-		exit();
-	}
-
-	$result = Cache::get('jsonld_document_loader:' . $url);
-	if (!is_null($result)) {
-		return $result;
-	}
-
-	$data = jsonld_default_document_loader($url);
-	Cache::set('jsonld_document_loader:' . $url, $data, CACHE_DAY);
-	return $data;
-}
-
-	public static function compactJsonLD($json)
-	{
-		jsonld_set_document_loader('Friendica\Protocol\ActivityPub::jsonld_document_loader');
-
-		$context = (object)['as' => 'https://www.w3.org/ns/activitystreams',
-			'w3sec' => 'https://w3id.org/security',
-			'ostatus' => (object)['@id' => 'http://ostatus.org#', '@type' => '@id'],
-			'vcard' => (object)['@id' => 'http://www.w3.org/2006/vcard/ns#', '@type' => '@id'],
-			'uuid' => (object)['@id' => 'http://schema.org/identifier', '@type' => '@id']];
-
-		$jsonobj = json_decode(json_encode($json));
-
-		$compacted = jsonld_compact($jsonobj, $context);
-
-		return json_decode(json_encode($compacted), true);
-	}
-
 	public static function isRequest()
 	{
 		return stristr(defaults($_SERVER, 'HTTP_ACCEPT', ''), 'application/activity+json') ||
diff --git a/src/Util/JsonLD.php b/src/Util/JsonLD.php
new file mode 100644
index 000000000..e8ff5888d
--- /dev/null
+++ b/src/Util/JsonLD.php
@@ -0,0 +1,68 @@
+<?php
+/**
+ * @file src/Util/JsonLD.php
+ */
+namespace Friendica\Util;
+
+use Friendica\Core\Cache;
+use digitalbazaar\jsonld as DBJsonLD;
+
+/**
+ * @brief This class contain methods to work with JsonLD data
+ */
+class JsonLD
+{
+	public static function documentLoader($url)
+	{
+		$recursion = 0;
+
+		$x = debug_backtrace();
+		if ($x) {
+			foreach ($x as $n) {
+				if ($n['function'] === __FUNCTION__)  {
+					$recursion ++;
+				}
+			}
+		}
+
+		if ($recursion > 5) {
+			logger('jsonld bomb detected at: ' . $url);
+			exit();
+		}
+
+		$result = Cache::get('documentLoader:' . $url);
+		if (!is_null($result)) {
+			return $result;
+		}
+
+		$data = jsonld_default_document_loader($url);
+		Cache::set('documentLoader:' . $url, $data, CACHE_DAY);
+		return $data;
+	}
+
+	public static function normalize($json)
+	{
+		jsonld_set_document_loader('Friendica\Util\JsonLD::documentLoader');
+
+		$jsonobj = json_decode(json_encode($json));
+
+		return jsonld_normalize($jsonobj, array('algorithm' => 'URDNA2015', 'format' => 'application/nquads'));
+	}
+
+	public static function compact($json)
+	{
+		jsonld_set_document_loader('Friendica\Util\JsonLD::documentLoader');
+
+		$context = (object)['as' => 'https://www.w3.org/ns/activitystreams',
+			'w3sec' => 'https://w3id.org/security',
+			'ostatus' => (object)['@id' => 'http://ostatus.org#', '@type' => '@id'],
+			'vcard' => (object)['@id' => 'http://www.w3.org/2006/vcard/ns#', '@type' => '@id'],
+			'uuid' => (object)['@id' => 'http://schema.org/identifier', '@type' => '@id']];
+
+		$jsonobj = json_decode(json_encode($json));
+
+		$compacted = jsonld_compact($jsonobj, $context);
+
+		return json_decode(json_encode($compacted), true);
+	}
+}