From 7ed7c7ba0dfd3f73a7d8a621988d7e99f07a23ef Mon Sep 17 00:00:00 2001
From: Sadie Powell
Date: Thu, 12 Mar 2026 15:15:38 +0000
Subject: Move <options:defaultmodes> to <channels> and rework.

- The default prefix modes are now separate from the default channel
  modes. This should result in less accidentally broken configs.

- The privs are now pre-parsed to a list of mode references. This
  should improve performance slightly as the repeated mode lookups
  are gone. It also allows us to write warnings to the debug log
  when the default privs are invalid.

- Channels can now have a default topic.
---
 src/channels.cpp | 56 ++++++--------------------------------------------------
 1 file changed, 6 insertions(+), 50 deletions(-)

(limited to 'src/channels.cpp')

diff --git a/src/channels.cpp b/src/channels.cpp
index 7df30b452..67c0b1179 100644
--- a/src/channels.cpp
+++ b/src/channels.cpp
@@ -119,42 +119,6 @@ Membership* Channel::GetUser(User* user) const
 	return i->second;
 }
 
-void Channel::SetDefaultModes()
-{
-	ServerInstance->Logs.Debug("CHANNELS", "Setting default modes on {}: {}", name,
-		ServerInstance->Config->DefaultModes);
-	irc::spacesepstream list(ServerInstance->Config->DefaultModes);
-	std::string modeseq;
-	std::string parameter;
-
-	list.GetToken(modeseq);
-
-	for (const auto modechr : modeseq)
-	{
-		ModeHandler* mode = ServerInstance->Modes.FindMode(modechr, MODETYPE_CHANNEL);
-		if (mode)
-		{
-			if (mode->IsPrefixMode())
-				continue;
-
-			if (mode->NeedsParam(true))
-			{
-				// If the parameter is missing or begins with a ':' then it's invalid
-				if (!list.GetToken(parameter) || parameter[0] == ':')
-					continue;
-			}
-			else
-			{
-				// The mode does not take a parameter.
-				parameter.clear();
-			}
-
-			Modes::Change modechange(mode, true, parameter);
-			mode->OnModeChange(ServerInstance->FakeClient, ServerInstance->FakeClient, this, modechange);
-		}
-	}
-}
-
 /*
  * add a channel to a user, creating the record for it if needed and linking
  * it to the user record
@@ -173,12 +137,10 @@ Membership* Channel::JoinUser(LocalUser* user, std::string cname, bool override,
 
 	auto* chan = ServerInstance->Channels.Find(cname);
 	bool created_by_local = !chan; // Flag that will be passed to ForceJoin later
-	std::string privs; // Prefix mode(letter)s to give to the joining user
+	PrefixMode::Set privs; // Prefix modes to give to the joining user
 
 	if (!chan)
 	{
-		privs = ServerInstance->Config->DefaultModes.substr(0, ServerInstance->Config->DefaultModes.find(' '));
-
 		// Ask the modules whether they're ok with the join, pass NULL as Channel* as the channel is yet to be created
 		ModResult modres;
 		FIRST_MOD_RESULT(OnUserPreJoin, modres, (user, nullptr, cname, privs, key, override));
@@ -186,8 +148,6 @@ Membership* Channel::JoinUser(LocalUser* user, std::string cname, bool override,
 			return nullptr; // A module wasn't happy with the join, abort
 
 		chan = new Channel(cname, ServerInstance->Time());
-		// Set the default modes on the channel (<options:defaultmodes>)
-		chan->SetDefaultModes();
 	}
 	else
 	{
@@ -209,7 +169,7 @@ Membership* Channel::JoinUser(LocalUser* user, std::string cname, bool override,
 	return chan->ForceJoin(user, &privs, false, created_by_local);
 }
 
-Membership* Channel::ForceJoin(User* user, const std::string* privs, bool bursting, bool created_by_local)
+Membership* Channel::ForceJoin(User* user, const PrefixMode::Set* privs, bool bursting, bool created_by_local)
 {
 	if (user->IsServer())
 	{
@@ -228,15 +188,11 @@ Membership* Channel::ForceJoin(User* user, const std::string* privs, bool bursti
 	{
 		// If the user was granted prefix modes (in the OnUserPreJoin hook, or they're a
 		// remote user and their own server set the modes), then set them internally now
-		for (const auto priv : *privs)
+		for (auto* priv : *privs)
 		{
-			PrefixMode* mh = ServerInstance->Modes.FindPrefixMode(priv);
-			if (mh)
-			{
-				// Set the mode on the user.
-				Modes::Change modechange(mh, true, user->nick);
-				mh->OnModeChange(ServerInstance->FakeClient, nullptr, this, modechange);
-			}
+			// Set the mode on the user.
+			Modes::Change modechange(priv, true, user->nick);
+			priv->OnModeChange(ServerInstance->FakeClient, nullptr, this, modechange);
 		}
 	}
 
-- 
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