X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FCore%2FACL.php;h=a4acf58bad4fb0fb54590ad47e63e268379af375;hb=384fe562a8dff1bbc584c17e78c4f79bf3d5b7e9;hp=2a9c02e81216fc5468cb92117728f1990ebdd671;hpb=b5d2d32b443f7aa8ec6e0e91f36da3cc0a0f2a82;p=friendica.git

diff --git a/src/Core/ACL.php b/src/Core/ACL.php
index 2a9c02e812..a4acf58bad 100644
--- a/src/Core/ACL.php
+++ b/src/Core/ACL.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * @copyright Copyright (C) 2010-2021, the Friendica project
+ * @copyright Copyright (C) 2010-2022, the Friendica project
  *
  * @license GNU AGPL version 3 or any later version
  *
@@ -341,4 +341,62 @@ class ACL
 
 		return $o;
 	}
+
+	/**
+	 * Checks the validity of the given ACL string
+	 *
+	 * @param string $acl_string
+	 * @param int    $uid
+	 * @return bool
+	 * @throws Exception
+	 */
+	public static function isValidContact($acl_string, $uid)
+	{
+		if (empty($acl_string)) {
+			return true;
+		}
+
+		// split <x><y><z> into array of cids
+		preg_match_all('/<[A-Za-z0-9]+>/', $acl_string, $array);
+
+		// check for each cid if the contact is valid for the given user
+		$cid_array = $array[0];
+		foreach ($cid_array as $cid) {
+			$cid = str_replace(['<', '>'], ['', ''], $cid);
+			if (!DBA::exists('contact', ['id' => $cid, 'uid' => $uid])) {
+				return false;
+			}
+		}
+
+		return true;
+	}
+
+	/**
+	 * Checks the validity of the given ACL string
+	 *
+	 * @param string $acl_string
+	 * @param int    $uid
+	 * @return bool
+	 * @throws Exception
+	 */
+	public static function isValidGroup($acl_string, $uid)
+	{
+		if (empty($acl_string)) {
+			return true;
+		}
+
+		// split <x><y><z> into array of cids
+		preg_match_all('/<[A-Za-z0-9]+>/', $acl_string, $array);
+
+		// check for each cid if the contact is valid for the given user
+		$gid_array = $array[0];
+		foreach ($gid_array as $gid) {
+			$gid = str_replace(['<', '>'], ['', ''], $gid);
+			if (!DBA::exists('group', ['id' => $gid, 'uid' => $uid, 'deleted' => false])) {
+				return false;
+			}
+		}
+
+		return true;
+	}
 }