Work out which attributes are available to a DN

app/Ldap/Entry.php

@@ -103,6 +103,21 @@ class Entry extends Model
 		return Crypt::encryptString($this->getDn());
 	}
 
+	/**
+	 * Return a list of available attributes - as per the objectClass entry of the record
+	 *
+	 * @return Collection
+	 */
+	public function getAvailableAttributes(): Collection
+	{
+		$result = collect();
+
+		foreach ($this->objectclass as $oc)
+			$result = $result->merge(config('server')->schema('objectclasses',$oc)->attributes);
+
+		return $result;
+	}
+
 	/**
 	 * Return a list of LDAP internal attributes
 	 *
@@ -115,6 +130,16 @@ class Entry extends Model
 		});
 	}
 
+	/**
+	 * Return a list of attributes without any values
+	 *
+	 * @return Collection
+	 */
+	public function getMissingAttributes(): Collection
+	{
+		return $this->getAvailableAttributes()->diff($this->getVisibleAttributes());
+	}
+
 	/**
 	 * Return this list of user attributes
 	 *