From 96befc58f073b4f96771b57d728b16742294c2fe Mon Sep 17 00:00:00 2001
From: Sadie Powell
Date: Tue, 22 Dec 2020 03:53:00 +0000
Subject: Send RPL_SAVENICK from irc2 when renaming a user to their UUID.

---
 src/modules/m_codepage.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/modules/m_codepage.cpp')

diff --git a/src/modules/m_codepage.cpp b/src/modules/m_codepage.cpp
index 7a20e6e52..4054c72c1 100644
--- a/src/modules/m_codepage.cpp
+++ b/src/modules/m_codepage.cpp
@@ -83,7 +83,10 @@ class ModuleCodepage
 		{
 			LocalUser* user = *iter;
 			if (user->nick != user->uuid && !ServerInstance->IsNick(user->nick))
+			{
+				user->WriteNumeric(RPL_SAVENICK, user->uuid, "Your nickname is no longer valid.");
 				user->ChangeNick(user->uuid);
+			}
 		}
 	}
 
-- 
cgit v1.3.1-10-gc9f91


From 79cc3caeb8f485ab0bdc405ab4ead54a25ab097c Mon Sep 17 00:00:00 2001
From: Sadie Powell
Date: Tue, 22 Dec 2020 04:10:07 +0000
Subject: After changing the codepage rename duplicate users to their UUID.

---
 src/modules/m_codepage.cpp | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'src/modules/m_codepage.cpp')

diff --git a/src/modules/m_codepage.cpp b/src/modules/m_codepage.cpp
index 4054c72c1..45fdb3d83 100644
--- a/src/modules/m_codepage.cpp
+++ b/src/modules/m_codepage.cpp
@@ -76,6 +76,21 @@ class ModuleCodepage
 		hashmap.swap(newhash);
 	}
 
+	void CheckDuplicateNick()
+	{
+		insp::flat_set<std::string, irc::insensitive_swo> duplicates;
+		const UserManager::LocalList& list = ServerInstance->Users.GetLocalUsers();
+		for (UserManager::LocalList::const_iterator iter = list.begin(); iter != list.end(); ++iter)
+		{
+			LocalUser* user = *iter;
+			if (user->nick != user->uuid && !duplicates.insert(user->nick).second)
+			{
+				user->WriteNumeric(RPL_SAVENICK, user->uuid, "Your nickname is no longer available.");
+				user->ChangeNick(user->uuid);
+			}
+		}
+	}
+
 	void CheckInvalidNick()
 	{
 		const UserManager::LocalList& list = ServerInstance->Users.GetLocalUsers();
@@ -115,6 +130,7 @@ class ModuleCodepage
 
 		ServerInstance->Config->CaseMapping = origcasemapname;
 		national_case_insensitive_map = origcasemap;
+		CheckDuplicateNick();
 		CheckRehash(casemap);
 
 		ServerInstance->ISupport.Build();
-- 
cgit v1.3.1-10-gc9f91