/*
* InspIRCd -- Internet Relay Chat Daemon
*
+ * Copyright (C) 2013, 2019, 2021 Sadie Powell <sadie@witchery.services>
+ * Copyright (C) 2013 Attila Molnar <attilamolnar@hush.com>
+ * Copyright (C) 2012 Robby <robby@chatbelgie.be>
+ * Copyright (C) 2010 Craig Edwards <brain@inspircd.org>
* Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#pragma once
-/**
- * This is the maximum length of a UUID (unique user identifier).
- * This length is set in compliance with TS6 protocol, and really should not be changed. Ever.
- * It allows for a lot of clients as-is. -- w00t.
- */
-#define UUID_LENGTH 10
+class CoreExport UIDGenerator
+{
+ private:
+ /** Holds the current UID. Used to generate the next one.
+ */
+ std::string current_uid;
+
+ /** Increments the current UID by one.
+ */
+ void IncrementUID(unsigned int pos);
+
+ public:
+ /**
+ * This is the maximum length of a UUID (unique user identifier).
+ * It allows up to 12,960 servers and 2,176,782,336 users per server.
+ */
+ static const unsigned int UUID_LENGTH = 9;
+
+ /** Initializes this UID generator with the given SID
+ * @param sid SID that conforms to InspIRCd::IsSID()
+ */
+ void init(const std::string& sid);
+ /** Returns the next available UID for this server.
+ */
+ std::string GetUID();
+ /** Generates a pseudorandom SID based on a servername and a description
+ * Guaranteed to return the same if invoked with the same parameters
+ * @param servername The server name to use as seed
+ * @param serverdesc The server description to use as seed
+ * @return A valid SID
+ */
+ static std::string GenerateSID(const std::string& servername, const std::string& serverdesc);
+};